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Grewal MK, Kudej RK, Grace M. Assessment of Combined Resection-Anastomosis and Urethropexy in Dogs with Urethral Prolapse. J Am Anim Hosp Assoc 2024; 60:179-187. [PMID: 39235784 DOI: 10.5326/jaaha-ms-7401] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/27/2024] [Indexed: 09/06/2024]
Abstract
The literature regarding surgical repair of urethral prolapse in dogs is limited and associated with a high recurrence rate. We hypothesized that combined resection and anastomosis (R&A) with urethropexy would be associated with less recurrence of urethral prolapse compared with R&A alone. Medical records of dogs managed surgically for urethral prolapse were reviewed (2013-2023) from three tertiary care hospitals. Inclusion criteria included complete medical records, including surgery reports, short-term postoperative complications, and longer-term follow-up. Forty-six male dogs successfully met the inclusion criteria (16 castrated; 30 intact). Brachycephalic breeds were overrepresented (37/46, 80%). Surgical repair by R&A alone (n = 27), urethropexy alone (n = 6), or a combined R&A and urethropexy (n = 13) was performed. Recurrence rates for these techniques were 13/27 (48%), 2/6 (33%), and 1/13 (8%), respectively. The recurrence rate of urethral prolapse treated by a combined R&A and urethropexy was significantly lower (P < .05) than R&A alone, despite more dogs being overweight and less surgeon experience (each P < .05). Interestingly, dogs neutered before initial diagnosis may be more likely to have postoperative recurrence. Considering general anesthesia risks, an initial combination procedure for urethral prolapse may help prevent recurrence.
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Affiliation(s)
- Manraj K Grewal
- From Cummings School of Veterinary Medicine at Tufts University, North Grafton, Massachusetts (M.K.G., R.K.K.); and
| | - Raymond K Kudej
- From Cummings School of Veterinary Medicine at Tufts University, North Grafton, Massachusetts (M.K.G., R.K.K.); and
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2
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McDonald A, Agarwal A, Williams B, Liu NC, Ladlow J. Neural network analysis of pharyngeal sounds can detect obstructive upper respiratory disease in brachycephalic dogs. PLoS One 2024; 19:e0305633. [PMID: 39172898 PMCID: PMC11340978 DOI: 10.1371/journal.pone.0305633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 06/03/2024] [Indexed: 08/24/2024] Open
Abstract
Brachycephalic obstructive airway syndrome (BOAS) is a highly prevalent respiratory disease affecting popular short-faced dog breeds such as Pugs and French bulldogs. BOAS causes significant morbidity, leading to poor exercise tolerance, sleep disorders and a shortened lifespan. Despite its severity, the disease is commonly missed by owners or disregarded by veterinary practitioners. A key clinical sign of BOAS is stertor, a low-frequency snoring sound. In recent years, a functional grading scheme has been introduced to semi-objectively grade BOAS based on the presence of stertor and other abnormal signs. However, correctly grading stertor requires significant experience and adding an objective component would aid accuracy and repeatability. This study proposes a recurrent neural network model to automatically detect and grade stertor in laryngeal electronic stethoscope recordings. The model is developed using a novel dataset of 665 labelled recordings taken from 341 dogs with diverse BOAS clinical signs. Evaluated via nested cross validation, the neural network predicts the presence of clinically significant BOAS with an area under the receiving operating characteristic of 0.85, an operating sensitivity of 71% and a specificity of 86%. The algorithm could enable widespread screening for BOAS to be conducted by both owners and veterinarians, improving treatment and breeding decisions.
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Affiliation(s)
- Andrew McDonald
- Department of Engineering, University of Cambridge, Cambridge, United Kingdom
| | - Anurag Agarwal
- Department of Engineering, University of Cambridge, Cambridge, United Kingdom
| | - Ben Williams
- Department of Engineering, University of Cambridge, Cambridge, United Kingdom
| | - Nai-Chieh Liu
- Institute of Veterinary Clinical Science, School of Veterinary Medicine, National Taiwan University, Taipei, Taiwan
- Queen’s Veterinary School Hospital, Cambridge, United Kingdom
| | - Jane Ladlow
- Queen’s Veterinary School Hospital, Cambridge, United Kingdom
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3
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Kähler E, Meyer-Lindenberg A, Zablotski Y, Schroers M. Salivary cortisol measurements in brachycephalic dog breeds as part of a standardized stress test. Front Vet Sci 2024; 11:1351225. [PMID: 39144074 PMCID: PMC11322112 DOI: 10.3389/fvets.2024.1351225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Accepted: 07/17/2024] [Indexed: 08/16/2024] Open
Abstract
Introduction Brachycephalic obstructive airway syndrome (BOAS) is a common condition in brachycephalic dogs, with Pugs (PG) and French Bulldogs (FB) appearing to be particularly typically affected. Objective and easy-to-perform tests are necessary to detect the disease at an early stage and to exclude dogs affected by BOAS from breeding. Methods The present study investigated the extent to which vital signs and salivary cortisol concentrations can be used to distinguish between healthy and BOAS-affected dogs in a standardized fitness test. A total of 57 PG, 56 FB and 27 meso- and dolichocephalic dogs were studied as control group (CG). In addition to vital signs, salivary cortisol concentrations were measured before and after the exercise test. Results It emerged that non-brachycephalic dogs showed a higher fitness level than brachycephalic dogs. The PG recovered significantly slower than the FB after the exercise test. In unaffected PG, cortisol levels rose significantly after the test and then fell again, in unaffected FB they fell significantly during the test. Unexpectedly, cortisol levels remained constant in BOAS affected dogs of both breeds. Discussion A possible explanation could be a disturbance of the pituitary-hypothalamic-adrenal axis, which could be due to the chronic stress of affected animals. This would have to be clarified in further studies. In conclusion, a submaximal fitness test may be a useful method to identify dogs suffering from BOAS as it is imperative to prevent the breeding and reproduction of affected dogs.
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Affiliation(s)
| | | | | | - Maike Schroers
- Veterinary Faculty, Clinic of Small Animal Surgery and Reproduction, Ludwig-Maximilians-Universität München, Munich, Germany
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Lilja-Maula LIO, Mäki KH, Aromaa MK, Rajamäki MM. Evaluation of brachycephalic obstructive airway syndrome breeding test results in Finland from 2017 to 2022. Acta Vet Scand 2024; 66:35. [PMID: 39026339 PMCID: PMC11264736 DOI: 10.1186/s13028-024-00755-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Accepted: 07/09/2024] [Indexed: 07/20/2024] Open
Abstract
BACKGROUND Brachycephalic obstructive airway syndrome (BOAS), observed in many flat-faced dog breeds, is one of the most urgent welfare problems in pedigree dogs. Various breeding schemes against BOAS have been implemented in many countries during recent years, but their impact on breed health remains unknown. The BOAS breeding test, used by the Finnish Kennel Club (FKC), includes an exercise component with a recovery assessment, BOAS grading by a veterinarian that evaluates upper respiratory signs before and after exercise, and a nostril stenosis assessment. The aim of our study was to evaluate BOAS breeding test results and estimate the heritability of the BOAS grade using parent-offspring regression from FKC data collected during 2017-2022. RESULTS The majority (80%) of dogs (n = 957) participating in FKC BOAS testing were English Bulldogs, French Bulldogs, and Pugs. In 2022, 89-100% of the litters from these three breeds registered with the FKC had at least one parent tested for BOAS. The proportion of dogs failing the exercise test was highest in English Bulldogs (11%), followed by French Bulldogs (4%) and Pugs (3%). In these three breeds, moderate to severe BOAS signs were reported in 28%, 22% and 30% of dogs, respectively. The proportion of moderate to severe nostril stenosis was highest (71%) in Pugs, followed by French Bulldogs (55%), and English Bulldogs (40%). Estimates of heritability for BOAS grade were separately calculated for these three breeds and for all dogs, and the estimates were moderate to high, ranging from 0.39 to 0.58. CONCLUSIONS The exercise test alone did not sufficiently identify dogs with moderate to severe BOAS signs. To better consider the complex nature of BOAS and breed differences, exercise tolerance, the severity of upper respiratory signs (BOAS grade) and nostril stenosis should all be assessed together in breeding animals. The heritability estimates for veterinary-assessed BOAS grade indicated that BOAS grade could be used in selective breeding to obtain less-affected offspring.
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Affiliation(s)
- Liisa Iiris Onerva Lilja-Maula
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, P. O. Box 57, 00014, Helsinki, Finland.
- Finnish Kennel Club, Valimotie 17-19, Helsinki, Finland.
| | | | - Mimma Kristiina Aromaa
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, P. O. Box 57, 00014, Helsinki, Finland
| | - Minna Marjaana Rajamäki
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, University of Helsinki, P. O. Box 57, 00014, Helsinki, Finland
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Filipas MC, Owen L, Adami C. A retrospective observational cohort study on the postoperative respiratory complications and their risk factors in brachycephalic dogs undergoing BOAS surgery: 199 cases (2019-2021). J Small Anim Pract 2024; 65:329-337. [PMID: 38413137 DOI: 10.1111/jsap.13707] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 01/11/2024] [Accepted: 01/17/2024] [Indexed: 02/29/2024]
Abstract
OBJECTIVES To observe the occurrence of postanaesthetic respiratory complications and to determine their prevalence and risk factors in dogs undergoing brachycephalic obstructive airway syndrome surgery. MATERIALS AND METHODS Data from 199 clinical records were retrospectively analysed. Univariable logistic regression followed by multivariable logistic regression was used to identify associations between the dependent variables (set as the postoperative respiratory complications observed in the study dogs) and various independent covariates. The quality of model-fit was assessed using the likelihood ratio test. P≤0.05 was considered statistically significant. RESULTS Four postoperative respiratory complications were observed: hypoxaemia (n=10/199; 5%), dyspnoea requiring tracheal re-intubation (n=13/199, 7%), dyspnoea requiring tracheostomy (n=10/199, 5%) and aspiration pneumonia (n=12/199, 6%). Univariable logistic regression showed an association between postoperative aspiration pneumonia and increasing body condition score and American Society of Anaesthesiology classification; however, when these covariates were evaluated in the multivariable model significance was not maintained. Risk factors for tracheostomy were preoperative and postoperative aspiration pneumonia (odds ratio: 9.52, 95% confidence interval: 1.56 to 57.93) and increasing brachycephalic obstructive airway syndrome grade (odds ratio: 4.65, 95% confidence interval: 0.79 to 27.50). CLINICAL SIGNIFICANCE High brachycephalic obstructive airway syndrome grade and aspiration pneumonia, either developing peri-operatively or as pre-existing condition, may represent risk factors for postoperative tracheostomy. Preoperative diagnosis of aspiration pneumonia may further increase the risk of postoperative complications.
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Affiliation(s)
- M C Filipas
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge, CB3 OES, UK
| | - L Owen
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge, CB3 OES, UK
| | - C Adami
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge, CB3 OES, UK
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6
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Ullal TV, Marks SL, Yang NT, Taylor SL. Evaluating acidic gastroesophageal reflux with wireless pH monitoring in French bulldogs with sliding hiatal herniation. J Vet Intern Med 2024; 38:1475-1482. [PMID: 38514174 PMCID: PMC11099765 DOI: 10.1111/jvim.17048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 03/05/2024] [Indexed: 03/23/2024] Open
Abstract
BACKGROUND Sliding hiatal herniation (SHH) and gastroesophageal reflux (GER) commonly occur in French bulldogs. Wireless pH monitoring can quantitatively assess acidic GER in dogs affected by SHH. HYPOTHESIS/OBJECTIVES Measure acidic GER in French bulldogs with SHH, pre- and post-brachycephalic obstructive airway syndrome (BOAS) surgery, utilizing a wireless pH capsule (Bravo Calibration-free, Medtronic, Minnesota), and correlate with owners' observations of regurgitation. ANIMALS Eleven French bulldogs diagnosed with SHH via swallowing fluoroscopy. METHODS Prospective cohort study. A pH capsule was endoscopically placed in the esophagus. Up to 96 hours of data were acquired as the owner logged clinical signs. Spearman's correlation and Wilcoxon rank-sum tests evaluated factors correlated with acid exposure time (AET), defined by the % time pH < 4. In 4/11 dogs, Bravo monitoring was repeated 2-4 months after BOAS surgery. RESULTS Medians (Q1-Q3) for age and weight were 21 months (17-35.5) and 10.0 kg (8.9-11.5). BOAS severity was mild (3), moderate (4), or severe (4). Medians (Q1-Q3) for AET and reflux events were 3.3% (2.6-6.4) and 70 (34-173). Clinical score (P = .82) and BOAS severity (P = .60) were not correlated with AET, but age was negatively correlated (rho = -.66, P = .03). Median probability (Q1-Q3) that regurgitation was associated with a reflux event was 72.5% (0-99). Percent AET numerically improved in all 4 dogs that underwent BOAS surgery although not statistically assessed. CONCLUSIONS AND CLINICAL IMPORTANCE Wireless pH monitoring documented acidic GER in French bulldogs with SHH, captured subclinical events, and showed improvements after BOAS surgery.
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Affiliation(s)
- Tarini V. Ullal
- Department of Medicine and Epidemiology, School of Veterinary MedicineUniversity of California DavisDavisCaliforniaUSA
| | - Stanley L. Marks
- Department of Medicine and Epidemiology, School of Veterinary MedicineUniversity of California DavisDavisCaliforniaUSA
| | - Nuen Tsang Yang
- Division of Biostatistics, School of MedicineUniversity of California DavisSacramentoCaliforniaUSA
| | - Sandra L. Taylor
- Division of Biostatistics, School of MedicineUniversity of California DavisSacramentoCaliforniaUSA
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Niinikoski I, Himanen S, Tenhunen M, Aromaa M, Lilja‐Maula L, Rajamäki MM. Evaluation of risk factors for sleep-disordered breathing in dogs. J Vet Intern Med 2024; 38:1135-1145. [PMID: 38358051 PMCID: PMC10937515 DOI: 10.1111/jvim.17019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 01/30/2024] [Indexed: 02/16/2024] Open
Abstract
BACKGROUND Brachycephalic dogs display sleep-disordered breathing (SDB). The risk factors for SDB remain unknown. OBJECTIVES To identify risk factors for SDB. We hypothesized that brachycephaly, increasing severity of brachycephalic obstructive airway syndrome (BOAS), excess weight, and aging predispose to SDB. ANIMALS Sixty-three privately owned pet dogs were prospectively recruited: 28 brachycephalic and 35 normocephalic (mesaticephalic or dolicocephalic) dogs. METHODS Prospective observational cross-sectional study with convenience sampling. Recording with the neckband was done over 1 night at each dog's home. The primary outcome measure was the obstructive respiratory event index (OREI). Body condition score (BCS) was assessed, and BOAS severity was graded for brachycephalic dogs. RESULTS Brachycephaly was a significant risk factor for high OREI value (ratio of the geometric means 5.6, 95% confidence interval [CI] 3.2-9.9; P < .001) but aging was not (1.1, 95% CI 1.0-1.2; P = .2). Excess weight, defined as a BCS of over 5/9, (3.5, 95% CI 1.8-6.7; P < .001) was a significant risk factor. In brachycephalic dogs, BOAS-positive class (moderate or severe BOAS signs) was a significant risk factor (2.5, 95% CI 1.1-5.6; P = .03). CONCLUSIONS AND CLINICAL IMPORTANCE Brachycephaly decreases welfare in a multitude of ways, including disrupting sleep. Brachycephaly, increasing severity of BOAS and excess weight are risk factors for obstructive SDB.
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Affiliation(s)
- Iida Niinikoski
- Department of Equine and Small Animal MedicineUniversity of HelsinkiHelsinkiFinland
| | - Sari‐Leena Himanen
- Faculty of Medicine and Health TechnologyTampere UniversityTampereFinland
- Department of Clinical NeurophysiologyTampere University Hospital, Wellbeing Services County of PirkanmaaTampereFinland
| | - Mirja Tenhunen
- Department of Clinical NeurophysiologyTampere University Hospital, Wellbeing Services County of PirkanmaaTampereFinland
- Department of Medical PhysicsTampere University Hospital, Wellbeing Services County of PirkanmaaTampereFinland
| | - Mimma Aromaa
- Department of Equine and Small Animal MedicineUniversity of HelsinkiHelsinkiFinland
| | - Liisa Lilja‐Maula
- Department of Equine and Small Animal MedicineUniversity of HelsinkiHelsinkiFinland
| | - Minna M. Rajamäki
- Department of Equine and Small Animal MedicineUniversity of HelsinkiHelsinkiFinland
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Miller AK, Regier PJ, Colee JC. Complications and outcome following staphylectomy and folded flap palatoplasty in dogs with brachycephalic obstructive airway syndrome. Vet Surg 2024; 53:29-37. [PMID: 37431947 DOI: 10.1111/vsu.13994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 06/01/2023] [Accepted: 06/25/2023] [Indexed: 07/12/2023]
Abstract
OBJECTIVE To compare the prevalence of pre-, intra-, and postoperative variables and complications associated with staphylectomy (S) and folded flap palatoplasty (FFP). STUDY DESIGN Retrospective study. SAMPLE POPULATION Client-owned dogs (n = 124). METHODS Medical records of S and FFP dogs from a veterinary teaching hospital were reviewed between July 2012 and December 2019. Signalment, clinical pre-, intra-, and postoperative data were collected and reviewed. Median (interquartile range) was reported. RESULTS A total of 124 dogs among 14 breeds underwent surgical treatment for an elongated soft palate with either a S (n = 64) or FFP (60). FFP dogs without concurrent non-airway procedures were associated with longer duration of surgery (p = .02; n = 63; S, median = 51 min [34-85]; FFP, median = 75 min [56.25-94.5]) and anesthesia (p = .02; n = 63; S, median = 80 min [66-125]; FFP, median = 111 min [91-140.8]). Neither soft palate surgery was associated with the occurrence of anesthetic complications (p = .30; 99/120; S, 49; FFP, 50), postoperative regurgitation (p = .18; 27/124; S, 17; FFP, 10), or with hospitalization duration (p = .94; n = 124; S, median = 1 day [1]; FFP, median = 1 [1]). Postoperative aspiration pneumonia (9/124; S, 4; FFP, 5) and major complications were rare (5/124; S, 3; FFP, 2). CONCLUSION S and FFP had similar anesthetic and perioperative complications, although FFP dogs had longer anesthetic and operative times. CLINICAL SIGNIFICANCE Although FFP took longer, no other clinically significant differences were appreciated between S and FFP procedures. Because of limitations inherent in study design, surgeons should continue to use clinical judgment when deciding on a procedure.
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Affiliation(s)
- Annellie K Miller
- Department of Small Animal Clinical Sciences, University of Florida, Gainesville, Florida, USA
| | - Penny J Regier
- Department of Small Animal Clinical Sciences, University of Florida, Gainesville, Florida, USA
| | - James C Colee
- Institute of Farm and Agricultural Sciences, Statistics Consulting Unit, University of Florida, Gainesville, Florida, USA
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Foster E, West N, Butterfield S, Rusbridge C, Crawford A. Respiratory compromise in French bulldogs presented with intervertebral disc extrusion. Vet Rec 2023; 193:e3603. [PMID: 37938865 DOI: 10.1002/vetr.3603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 08/06/2023] [Accepted: 09/29/2023] [Indexed: 11/10/2023]
Abstract
BACKGROUND French bulldogs hospitalised for the management of intervertebral disc extrusion (IVDE) are frequently affected by respiratory compromise, typically brachycephalic-associated upper respiratory obstruction and/or aspiration events. We evaluated the occurrence of such respiratory compromise events in French bulldogs presented to two referral hospitals. METHODS Clinical data for French bulldogs diagnosed with IVDE were retrospectively collated, including severity of neurological deficits, neuroanatomical localisation, diagnosis, details of respiratory compromise, treatment and outcome. RESULTS A total of 306 dogs diagnosed with IVDE were included. Sixty dogs (19.6%) experienced respiratory compromise, of which 31 dogs (10.1%) progressed to cyanosis, collapse or respiratory arrest. LIMITATIONS The study was limited by its retrospective nature. Furthermore, the duration of hospitalisation was not evaluated and the decision for euthanasia was often multifactorial. CONCLUSION One in five French bulldogs presented with IVDE experienced respiratory compromise. The detrimental welfare effects of this warrant further discussion.
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Affiliation(s)
- Emma Foster
- Clinical Science and Services, Royal Veterinary College, Hatfield, UK
- The Neighbourhood Vet, London, UK
| | - Natalie West
- North Downs Specialist Referrals, Bletchingley, UK
- Fitzpatrick Referrals Orthopaedics and Neurology, Eashing, UK
| | - Sarah Butterfield
- Clinical Science and Services, Royal Veterinary College, Hatfield, UK
| | - Clare Rusbridge
- Fitzpatrick Referrals Orthopaedics and Neurology, Eashing, UK
- Wear Referrals Veterinary Specialist & Emergency Hospital, Stockton-on-Tees, UK
- School of Veterinary Medicine, University of Surrey, Guildford, UK
| | - Abbe Crawford
- Clinical Science and Services, Royal Veterinary College, Hatfield, UK
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Oren A, Türkcü JD, Meller S, Lazebnik T, Wiegel P, Mach R, Volk HA, Zamansky A. BrachySound: machine learning based assessment of respiratory sounds in dogs. Sci Rep 2023; 13:20300. [PMID: 37985864 PMCID: PMC10661756 DOI: 10.1038/s41598-023-47308-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 11/11/2023] [Indexed: 11/22/2023] Open
Abstract
The early and accurate diagnosis of brachycephalic obstructive airway syndrome (BOAS) in dogs is pivotal for effective treatment and enhanced canine well-being. Owners often do underestimate the severity of BOAS in their dogs. In addition, traditional diagnostic methods, which include pharyngolaryngeal auscultation, are often compromised by subjectivity, are time-intensive and depend on the veterinary surgeon's experience. Hence, new fast, reliable assessment methods for BOAS are required. The aim of the current study was to use machine learning techniques to bridge this scientific gap. In this study, machine learning models were employed to objectively analyze 366 audio samples from 69 Pugs and 79 other brachycephalic breeds, recorded with an electronic stethoscope during a 15-min standardized exercise test. In classifying the BOAS test results as to whether the dog is affected or not, our models achieved a peak accuracy of 0.85, using subsets from the Pugs dataset. For predictions of the BOAS results from recordings at rest in Pugs and various brachycephalic breeds, accuracies of 0.68 and 0.65 were observed, respectively. Notably, the detection of laryngeal sounds achieved an F1 score of 0.80. These results highlight the potential of machine learning models to significantly streamline the examination process, offering a more objective assessment than traditional methods. This research indicates a turning point towards a data-driven, objective, and efficient approach in canine health assessment, fostering standardized and objective BOAS diagnostics.
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Affiliation(s)
- Ariel Oren
- Information Systems Department, University of Haifa, Haifa, Israel
| | - Jana D Türkcü
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Sebastian Meller
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Teddy Lazebnik
- Cancer Institute, University College London, London, UK
- Department of Mathematics, Ariel University, Ariel, Israel
| | - Pia Wiegel
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Rebekka Mach
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Holger A Volk
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, Hannover, Germany
| | - Anna Zamansky
- Information Systems Department, University of Haifa, Haifa, Israel.
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11
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Türkcü JD, Meller S, Wiegel PS, Nolte I, Volk HA. Evaluation of the Submaximal Treadmill-Based Fitness Test in Six Brachycephalic Breeds-A Follow-Up Study. Animals (Basel) 2023; 13:3413. [PMID: 37958168 PMCID: PMC10648995 DOI: 10.3390/ani13213413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/27/2023] [Accepted: 11/02/2023] [Indexed: 11/15/2023] Open
Abstract
Brachycephalic obstructive airway syndrome (BOAS) in dogs challenges veterinary surgeons both with a complex clinical picture as well as wide-ranging ways to diagnose the disease, often not easily implemented nor standardised in clinical practice. The assessment of a combination of exercise testing, the occurrence of breathing noises, recovery time, and respiratory effort proved to be an appropriate method to identify Pugs with BOAS. The purpose of this study was to apply an established standardised, submaximal, treadmill-based fitness test for Pugs to other brachycephalic dog breeds. A total of 79 participants, belonging to 6 different brachycephalic breeds, trotted 15 min with an individual comfort speed of 3-7 km/h on a treadmill. Additionally, functional BOAS grading based on respiratory clinical signs before and after exercise was applied. The test was passed if the dogs presented with a BOAS grade of 0 or 1 and their vital parameters recovered to baseline within 15 min after exercise. A total of 68% showed a BOAS grade of 0 or 1 and passed the fitness test. Of the failed participants, 65% failed due to BOAS affectedness, 9% were categorised as not affected by BOAS and failed due to not passing the fitness test only, and 26% showed both failure criteria. The fitness test can be a useful method to identify BOAS-affected dogs in other brachycephalic breeds and to diagnose BOAS in dogs that only show clinical signs under exercise.
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Affiliation(s)
| | | | | | | | - Holger A. Volk
- Department of Small Animal Medicine and Surgery, University of Veterinary Medicine Hannover, 30559 Hannover, Germany; (J.D.T.); (S.M.); (P.S.W.); (I.N.)
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12
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Clark N, Comerford E. An update on mobility assessment of dogs with musculoskeletal disease. J Small Anim Pract 2023; 64:599-610. [PMID: 37455329 DOI: 10.1111/jsap.13650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 03/31/2023] [Accepted: 06/10/2023] [Indexed: 07/18/2023]
Abstract
Mobility impairments associated with musculoskeletal diseases, such as osteoarthritis and degenerative joint disease, affect approximately 200,000 dogs annually and pose a notable challenge to canine health and welfare. Osteoarthritis causes the remodelling of synovial joints, alongside inflammation and impaired mechanical function which can be extremely debilitating. Secondary osteoarthritis commonly affects dogs and can be exacerbated by previous joint abnormalities, such as patellar luxation or cranial cruciate ligament rupture. Although musculoskeletal diseases can affect dogs of any age, the early subtle signs of gait abnormalities are perhaps missed by owners, thus, dogs may be in the latter stages of osteoarthritis progression when they are presented to veterinarians. Dogs showing subtle signs of gait abnormalities must be presented to veterinary practices for acute diagnosis to prevent long-term deterioration. Musculoskeletal diseases, such as osteoarthritis and degenerative joint disease, are commonly diagnosed via visible radiographic changes. However, veterinarians can use a combination of subjective and objective clinical scoring systems, such as clinical metrology instruments and gait assessment in conjunction with radiography to aid their diagnosis and longitudinal monitoring of musculoskeletal diseases. These scoring systems may be more sensitive to earlier signs of mobility impairments in dogs, ultimately, promoting increased canine health and welfare by enabling pain reduction, improvement of muscle strength and preservation of joint function. Current canine mobility scoring systems available to veterinarians will be discussed in turn throughout this review for implementation into clinical practice.
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Affiliation(s)
- N Clark
- Institute of Life Course and Medical Sciences, Faculty of Health and Life Sciences, University of Liverpool, William Henry Duncan Building, 6 West Derby Street, Liverpool, L7 8TX, UK
| | - E Comerford
- Institute of Life Course and Medical Sciences, Faculty of Health and Life Sciences, University of Liverpool, William Henry Duncan Building, 6 West Derby Street, Liverpool, L7 8TX, UK
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Aromaa M, Putro H, Lilja-Maula L, Rajamäki MM. Comparison of habitual physical activity in French Bulldogs, Pugs and normocephalic dogs by accelerometry. Anim Welf 2023; 32:e60. [PMID: 38487414 PMCID: PMC10936329 DOI: 10.1017/awf.2023.80] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 06/28/2023] [Accepted: 07/10/2023] [Indexed: 03/17/2024]
Abstract
Brachycephalic obstructive airway syndrome (BOAS) is a major welfare concern in flat-faced dog breeds. As BOAS causes respiratory difficulties and exercise intolerance, it can reduce dogs' daily quality of life (QOL). However, evaluation of QOL in dogs is difficult, and many owners perceive BOAS signs as 'normal' for the breed. Accelerometers that measure frequency, duration and intensity of activities can offer an objective way of evaluating dogs' daily activity and thereby deliver potential insights into QOL. The aim of this study was to assess habitual physical activity of 48 brachycephalic and 23 non-brachycephalic dogs using accelerometers. The accelerometers were used for one week and owners filled in a questionnaire regarding their dog's well-being and activities. Veterinary-assessed BOAS grading for brachycephalic dogs was determined. Compared with controls, more severely affected French Bulldogs and Pugs had significantly lower total activity counts and spent less time in high activity. In Pugs, mildly affected dogs were also less active, but age can be a contributing factor here, as older age decreased activity in Pugs and controls showed a wider age range. In French Bulldogs, those dogs with no or mild signs of BOAS did not differ from controls regarding their daily activity. In conclusion, accelerometers were easy to use for objective measurement of daily activity in bracycephalic dogs, although a degree of discomfort due to the collar was reported. Results showed that BOAS signs were associated with decreased habitual physical activity. These findings emphasise the importance of actions taken to reduce incidence of BOAS in brachycephalic breeds.
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Affiliation(s)
- Mimma Aromaa
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, PO Box 57, FI-00014 University of Helsinki, Finland
| | - Heikki Putro
- Veterinary surgery Eläinlääkäriasema HauMau, Hietaniemenkatu 7, FI-00100 Helsinki, Finland
| | - Liisa Lilja-Maula
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, PO Box 57, FI-00014 University of Helsinki, Finland
| | - Minna M Rajamäki
- Department of Equine and Small Animal Medicine, Faculty of Veterinary Medicine, PO Box 57, FI-00014 University of Helsinki, Finland
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14
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Kämpf S, Fenk S, Van Cromvoirt A, Bogdanov N, Hartnack S, Stirn M, Hofmann-Lehmann R, Reichler IM, Bogdanova A. Differences in selected blood parameters between brachycephalic and non-brachycephalic dogs. Front Vet Sci 2023; 10:1166032. [PMID: 37649563 PMCID: PMC10464621 DOI: 10.3389/fvets.2023.1166032] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 07/11/2023] [Indexed: 09/01/2023] Open
Abstract
Introduction Cranial and upper-airway anatomy of short-nosed, flat-faced brachycephalic dogs predisposes them to brachycephalic obstructive airway syndrome (BOAS). Periodic apnoea increased inspiratory resistance, and an inability to thermoregulate effectively are characteristic of BOAS, but internationally accepted objective markers of BOAS severity are missing. The objective of this study was to compare the selected blood parameters between non-brachycephalic (NC) and brachycephalic (BC) dogs, exploring the possibility of developing a blood test for BOAS severity grading in the future. Methods We evaluated blood biochemistry, complete blood cell counts, red blood cell (RBC) indices, reticulocyte counts, a blood-born marker of intermittent hypoxia (glutathione, NO production), RBC hydration, deformability, and blood markers of metabolic changes and stress between BC (n = 18) and NC (meso- and dolichocephalic, n = 22) dogs. Results Reticulocyte counts and the abundance of middle-fluorescence immature reticulocytes were significantly (p < 0.05) higher in BC dogs compared to NC dogs. BC dogs had significantly more NO-derived NO2 - /NO3 - in plasma than NC dogs. RBCs of BC dogs were shedding significantly more membrane, as follows from the intensity of eosin maleimide staining, and had a significantly higher mean corpuscular hemoglobin concentration than NC dogs. Intracellular reduced glutathione content in RBCs of BC dogs was significantly lower, while plasma lactate was significantly higher in BC dogs compared to NC dogs. Plasma cholesterol and triglycerides were significantly lower, and cortisol was significantly higher in BC dogs compared to NC dogs. Eosinophil counts were significantly lower and the neutrophil-to-lymphocyte ratio was higher in BC dogs compared to NC dogs. Discussion Taken together, our findings suggest that the brachycephalic phenotype in dogs is associated with alterations at the level of blood cells and, systemically, with oxidation and metabolic changes. The parameters identified within this study should be further investigated for their potential as objective indicators for BOAS.
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Affiliation(s)
- Sandra Kämpf
- Red Blood Cell Research Group, Institute of Veterinary Physiology, Faculty of Vetsuisse, University of Zurich, Zürich, Switzerland
- Center for Clinical Studies (ZKS), Vetsuisse Faculty, University of Zurich, Zürich, Switzerland
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Zürich, Switzerland
| | - Simone Fenk
- Red Blood Cell Research Group, Institute of Veterinary Physiology, Faculty of Vetsuisse, University of Zurich, Zürich, Switzerland
- Center for Clinical Studies (ZKS), Vetsuisse Faculty, University of Zurich, Zürich, Switzerland
| | - Ankie Van Cromvoirt
- Red Blood Cell Research Group, Institute of Veterinary Physiology, Faculty of Vetsuisse, University of Zurich, Zürich, Switzerland
- Center for Clinical Studies (ZKS), Vetsuisse Faculty, University of Zurich, Zürich, Switzerland
| | - Nikolay Bogdanov
- Red Blood Cell Research Group, Institute of Veterinary Physiology, Faculty of Vetsuisse, University of Zurich, Zürich, Switzerland
- Center for Clinical Studies (ZKS), Vetsuisse Faculty, University of Zurich, Zürich, Switzerland
| | - Sonja Hartnack
- Section of Epidemiology, Vetsuisse Faculty, University of Zurich, Zürich, Switzerland
| | - Martina Stirn
- Clinical Laboratory, Department for Clinical Diagnostics and Services, Vetsuisse Faculty, University of Zurich, Zürich, Switzerland
| | - Regina Hofmann-Lehmann
- Center for Clinical Studies (ZKS), Vetsuisse Faculty, University of Zurich, Zürich, Switzerland
- Clinical Laboratory, Department for Clinical Diagnostics and Services, Vetsuisse Faculty, University of Zurich, Zürich, Switzerland
| | - Iris Margaret Reichler
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Zürich, Switzerland
| | - Anna Bogdanova
- Red Blood Cell Research Group, Institute of Veterinary Physiology, Faculty of Vetsuisse, University of Zurich, Zürich, Switzerland
- Center for Clinical Studies (ZKS), Vetsuisse Faculty, University of Zurich, Zürich, Switzerland
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15
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Niinikoski I, Himanen S, Tenhunen M, Lilja‐Maula L, Rajamäki MM. Description of a novel method for detection of sleep-disordered breathing in brachycephalic dogs. J Vet Intern Med 2023; 37:1475-1481. [PMID: 37232547 PMCID: PMC10365046 DOI: 10.1111/jvim.16783] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 05/12/2023] [Indexed: 05/27/2023] Open
Abstract
BACKGROUND Sleep-disordered breathing (SDB), defined as any difficulty in breathing during sleep, occurs in brachycephalic dogs. Diagnostic methods for SDB in dogs require extensive equipment and laboratory assessment. OBJECTIVES To evaluate the usability of a portable neckband system for detection of SDB in dogs. We hypothesized that the neckband is a feasible method for evaluation of SDB and that brachycephaly predisposes to SDB. ANIMALS Twenty-four prospectively recruited client-owned dogs: 12 brachycephalic dogs and 12 control dogs of mesocephalic or dolicocephalic breeds. METHODS Prospective observational cross-sectional study with convenience sampling. Recording was done over 1 night at each dog's home. The primary outcome measure was the obstructive Respiratory Event Index (OREI), which summarized the rate of obstructive SDB events per hour. Additionally, usability, duration of recording, and snore percentage were documented. RESULTS Brachycephalic dogs had a significantly higher OREI value (Hodges-Lehmann estimator for median difference = 3.5, 95% confidence interval [CI] 2.2-6.8; P < .001) and snore percentage (Hodges-Lehmann estimator = 34.2, 95% CI 13.6-60.8; P < .001) than controls. A strong positive correlation between OREI and snore percentage was detected in all dogs (rs = .79, P < .001). The neckband system was easy to use. CONCLUSIONS AND CLINICAL IMPORTANCE Brachycephaly is associated with SDB. The neckband system is a feasible way of characterizing SDB in dogs.
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Affiliation(s)
- Iida Niinikoski
- Department of Equine and Small Animal MedicineUniversity of HelsinkiHelsinkiFinland
| | - Sari‐Leena Himanen
- Faculty of Medicine and Health TechnologyTampere UniversityTampereFinland
- Department of Clinical NeurophysiologyTampere University Hospital, Medical Imaging Centre and Hospital Pharmacy, Pirkanmaa Hospital DistrictTampereFinland
| | - Mirja Tenhunen
- Department of Clinical NeurophysiologyTampere University Hospital, Medical Imaging Centre and Hospital Pharmacy, Pirkanmaa Hospital DistrictTampereFinland
- Department of Medical PhysicsTampere University Hospital, Medical Imaging Centre and Hospital Pharmacy, Pirkanmaa Hospital DistrictTampereFinland
| | - Liisa Lilja‐Maula
- Department of Equine and Small Animal MedicineUniversity of HelsinkiHelsinkiFinland
| | - Minna M. Rajamäki
- Department of Equine and Small Animal MedicineUniversity of HelsinkiHelsinkiFinland
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16
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Bagardi M, Locatelli C, Ghilardi S, Creta F, Pasquinelli B, Brambilla PG, Romussi S. Does the Cambridge classification alone predict the possibility to perform echocardiographic examination in lateral recumbency in dogs affected by brachycephalic obstructive airways syndrome? PLoS One 2023; 18:e0286914. [PMID: 37285377 PMCID: PMC10246799 DOI: 10.1371/journal.pone.0286914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 05/26/2023] [Indexed: 06/09/2023] Open
Abstract
OBJECTIVES To evaluate if the functional grading system (Cambridge classification) of brachycephalic obstructive airways syndrome (BOAS) and the temperament score can be useful tools in predicting the feasibility of echocardiographic examination in lateral recumbency. The hypothesis is that the temperament of the dog, rather than the severity of BOAS alone, can exacerbate respiratory symptoms (dyspnea, stertor, stridor and/or cyanosis) during lateral containment. METHODS Prospective cross-sectional study. Twenty-nine French Bulldogs were included and classified according to the Cambridge classification for the BOAS and to the Maddern score for the temperament. Receiver operating characteristic analysis was used to evaluate the sensitivity (Se) and specificity (Sp) of the Cambridge classification, of the temperament score and their sum to predict the feasibility of the echocardiography in lateral recumbency without dyspnea/cyanosis. RESULTS 8 females (27.59%) and 21 (72.41%) males French Bulldogs of 3 years (IQR25-75 1-4), and 12.45 kg (IQR25-7511.5-13.25) were included. The Cambridge classification alone was not predictive for the possibility of performing the echocardiography in lateral recumbency, unlike temperament score and the sum of the two classification indices. The diagnostic accuracy of Cambridge classification (AUC 0.81, Se 50%, Sp 100%), temperament score (AUC 0.73, Se 75%, Sp 69%), and their sum (AUC 0.83, Se 75%, Sp 85%) cut-offs was moderate for each score. CLINICAL SIGNIFICANCE The dog's temperament, and therefore its susceptibility to stress, rather than the severity of BOAS (Cambridge classification) alone, is a good predictor of the possibility of performing the echocardiographic examination in standing instead of lateral recumbency.
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Affiliation(s)
- Mara Bagardi
- Department of Veterinary Medicine and Animal Sciences – DIVAS, University of Milan, Lodi (LO), Italy
| | - Chiara Locatelli
- Department of Veterinary Medicine and Animal Sciences – DIVAS, University of Milan, Lodi (LO), Italy
| | - Sara Ghilardi
- Department of Veterinary Medicine and Animal Sciences – DIVAS, University of Milan, Lodi (LO), Italy
| | - Federica Creta
- Department of Veterinary Medicine and Animal Sciences – DIVAS, University of Milan, Lodi (LO), Italy
| | - Beatrice Pasquinelli
- Department of Veterinary Medicine and Animal Sciences – DIVAS, University of Milan, Lodi (LO), Italy
| | - Paola G. Brambilla
- Department of Veterinary Medicine and Animal Sciences – DIVAS, University of Milan, Lodi (LO), Italy
| | - Stefano Romussi
- Department of Veterinary Medicine and Animal Sciences – DIVAS, University of Milan, Lodi (LO), Italy
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17
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Gleason HE, Phillips H, McCoy AM. Influence of feline brachycephaly on respiratory, gastrointestinal, sleep, and activity abnormalities. Vet Surg 2023; 52:435-445. [PMID: 36582029 DOI: 10.1111/vsu.13931] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2022] [Revised: 08/10/2022] [Accepted: 12/08/2022] [Indexed: 12/31/2022]
Abstract
OBJECTIVE To determine the influence of brachycephaly on respiratory, gastrointestinal, sleep, and activity-related parameters in cats. STUDY DESIGN Prospective questionnaire-based study. ANIMALS A total of 194 BC and 1003 non-BC cats. METHODS Owners completed an online questionnaire regarding respiratory, gastrointestinal, sleep, and activity-related parameters. Response options were scored, and individual scores summed to give a total clinical severity score for each cat. RESULTS Brachycephalic cats had more frequent snoring (odds ratio [OR] 6.89; 95% confidence interval [CI]: 5.06-9.41), sneezing (OR 6.52; CI: 4.75-8.98), nasal discharge (OR 8.26; 95% CI 5.77-11.85), coughing (OR 1.75; CI: 1.17-2.59), and dyspnea (OR 5.32; CI: 3.42-8.28); shorter activity before becoming dyspneic (OR 2.71; CI: 1.93-3.79), slower recovery from activity (OR 3.17; CI: 2.19-4.57), lower activity levels (OR 2.16; CI: 1.59-2.95), and increased respiratory noise (OR 6.68; CI: 4.71-9.52); and more hypersalivation (OR 2.50; CI: 1.47-4.16), halitosis (OR 1.40; CI: 1.00-1.95), and difficulty chewing (OR 5.19; CI: 3.65-7.38). Median clinical severity scores were higher for BC cats than non-BC cats (p < .0001). CONCLUSIONS Brachycephalic cats (BC) were at risk for respiratory, gastrointestinal, and activity-related symptoms compared to non-BC cats. CLINICAL RELEVANCE Some BC cats exhibit clinically relevant symptoms and behaviors as reported by owners. Medical or surgical interventions may improve these symptoms and warrant investigation.
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Affiliation(s)
- Hadley E Gleason
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, USA
| | - Heidi Phillips
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, USA
| | - Annette M McCoy
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, USA
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18
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Song A, Phillips H, Oliveira CR, McCoy AM. CT volumetric analysis permits comparison of tongue size and tongue fat in different canine brachycephalic and mesaticephalic breeds. Vet Radiol Ultrasound 2023. [PMID: 36787184 DOI: 10.1111/vru.13221] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 12/15/2022] [Accepted: 12/28/2022] [Indexed: 02/15/2023] Open
Abstract
While macroglossia is a newly accepted component of brachycephalic obstructive airway syndrome (BOAS) in dogs, macroglossia with increased tongue fat is a well-known cause for obstructive sleep apnea (OSA) in people, and targeted reduction procedures such as midline glossectomy are used to treat people with OSA. While midline glossectomy has been described in dogs, tissue contributions to macroglossia have not been characterized. The purpose of this retrospective, descriptive, case-control study was to describe and compare volumetric dimensions of the tongue and tongue fat in brachycephalic (BC) and mesaticephalic (MC) dogs using CT images. Data collected included head and neck CT images from 17 BC and 18 control MC dogs. Multiplanar reformatted and 3D reconstructed images were created using image segmentation and specialized visualization software to calculate volumetric dimensions of the total tongue, tongue fat, and tongue muscle. Rostral and caudal topographical distributions of fat were compared. Total tongue and tongue muscle volume (P < 0.0001) and tongue fat volume (P = 0.01) normalized to body weight (BW) were greater in BC dogs. More fat was localized in the caudal tongue in both groups (P < 0.04). In regression analysis, BC conformation and increased weight were significant predictors of increased tongue fat volume. As in people, increased tongue fat may contribute to macroglossia and sleep-disordered breathing in BC dogs. Use of CT volumetry to identify tongue fat deposits may permit targeted surgical reduction of tongue volume in BC dogs and contribute substantially to treatment of BOAS.
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Affiliation(s)
- Ava Song
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, USA
| | - Heidi Phillips
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, USA
| | - Cintia R Oliveira
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, USA
| | - Annette M McCoy
- Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, Illinois, USA
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19
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Mach R, Wiegel PS, Bach JP, Beyerbach M, Levicar C, Nolte I. Evaluation of blood pressure and NT-proBNP in pugs with and without clinical signs of Brachycephalic Obstructive Airway Syndrome. Front Vet Sci 2022; 9:1015157. [PMID: 36619949 PMCID: PMC9815440 DOI: 10.3389/fvets.2022.1015157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 11/29/2022] [Indexed: 12/24/2022] Open
Abstract
Brachycephalic Obstructive Airway Syndrome (BOAS) is a pathologic condition of the upper airways, frequently occurring in dogs of brachycephalic breeds including pugs. It has been suspected that BOAS may be associated with cardiovascular changes and an increased risk for hypertension. The cardiac biomarker NT-proBNP can help to differentiate cardiac from non-cardiac respiratory distress. A possible influence of BOAS on NT-proBNP values has not been investigated, however. The aim of the current study was to examine blood pressure and NT-proBNP levels in pugs with and without clinical signs of BOAS and compare them to values of mesocephalic dogs. For this purpose, NT-proBNP values of 42 pugs and six mesocephalic dogs and blood pressure measurements of 34 pugs and four mesocephalic dogs were explored in the present study. Pugs were examined for clinical signs of BOAS at rest and after a submaximal fitness test, and a functional BOAS grading was applied. Blood pressure (BP) was measured at the beginning and end of the study day and NT-proBNP values were obtained before and after exercise. Measured values of pugs with different degrees of clinical impairment due to BOAS were compared among each other as well as to the CG. In terms of systolic, mean, diastolic BP, and NT-pro BNP, there were no relevant differences between pugs and the CG and no obvious connection between the severity of BOAS symptoms and measured values. BP values of all groups were lower at the second measurement at the end of the study day. NT-proBNP measurements were higher after exercise. BP and NT-proBNP values in all groups were in agreement with commonly used reference ranges. In conclusion, the study adds evidence, that BP and NT-proBNP values did not differ between mesocephalic dogs and pugs with different levels of severity of BOAS but between the measurement times. Thus, in the present study, excitement and exercise seemed to have a greater influence on BP and NT-proBNP values than presence of BOAS symptoms or breed. Discovered values show that the commonly used reference ranges for BP and NT-proBNP are applicable in pugs. This indicates that NT-proBNP can be used to differentiate between cardiac and non-cardiac respiratory distress even in pugs with clinical symptoms of BOAS.
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Affiliation(s)
- Rebekka Mach
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany,*Correspondence: Rebekka Mach
| | - Pia Saskia Wiegel
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Jan-Peter Bach
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Martin Beyerbach
- Institute for Biometry, Epidemiology and Information Processing, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Charanthorn Levicar
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Ingo Nolte
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany,Ingo Nolte
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20
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Wiegel PS, Mach R, Nolte I, Freise F, Levicar C, Merhof K, Bach JP. Breed-specific values for vertebral heart score (VHS), vertebral left atrial size (VLAS), and radiographic left atrial dimension (RLAD) in pugs without cardiac disease, and their relationship to Brachycephalic Obstructive Airway Syndrome (BOAS). PLoS One 2022; 17:e0274085. [PMID: 36054125 PMCID: PMC9439199 DOI: 10.1371/journal.pone.0274085] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Accepted: 08/22/2022] [Indexed: 12/03/2022] Open
Abstract
This prospective study aims to establish reference ranges for vertebral heart score (VHS), vertebral left atrial size (VLAS), and radiographic left atrial dimension (RLAD) in pugs. The impact of clinical severity of Brachycephalic Obstructive Airway Syndrome (BOAS), gender, body condition score, and body weight on VHS, VLAS, and RLAD were investigated. Intra- and interobserver correlation was determined. Correlation of radiographic scores to echocardiographic left atrial dimension was inspected. Additionally, for VLAS and RLAD, correlation to VHS was examined. Additionally, an assessment of thoracic and vertebral malformations was performed. Forty-seven privately owned pugs underwent physical examination, echocardiography, and thoracic radiography to determine cardiac health. Thirty-two pugs were eligible for establishing reference ranges for VHS in right lateral radiographs, which was 11.25 ± 0.62 (95% range, 10.1–12.8). Reference ranges for VHS in left lateral, and for VLAS and RLAD in right lateral radiograph were determined in 30 pugs. The VHS in left lateral radiograph was 11.01 ± 0.70 (95% range, 9.4–12.6), VLAS was 1.96 ± 0.38 (95% range, 1.1–2.8), and RLAD was 1.59 ± 0.34 (95% range, 0.7–2.4). Clinical severity of BOAS did not show any impact on radiographic measurements. For VLAS, a significant correlation to VHS was detected by all observers. No other variables had a consistent influence on the radiographic scores given by all observers. Interobserver agreement was almost perfect for VHS (0.89 on right lateral and 0.91 on left lateral image), moderate for VLAS (0.49), and fair for RLAD (0.22). More than one third of the entire study population (18 of 47 pugs) showed at least one thoracic cavity or spine abnormality, often leading to considerable changes in vertebral body shape and size.
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Affiliation(s)
- Pia Saskia Wiegel
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Rebekka Mach
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Ingo Nolte
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
- * E-mail:
| | - Fritjof Freise
- Institute for Biometry, Epidemiology and Information Processing, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Charanthorn Levicar
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Kristina Merhof
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - Jan-Peter Bach
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
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21
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Wiegel PS, Nolte I, Mach R, Freise F, Bach JP. Reference ranges for standard-echocardiography in pugs and impact of clinical severity of Brachycephalic Obstructive Airway Syndrome (BOAS) on echocardiographic parameters. BMC Vet Res 2022; 18:282. [PMID: 35854376 PMCID: PMC9297600 DOI: 10.1186/s12917-022-03348-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Accepted: 06/15/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Echocardiographic measurements may be influenced by breed-specific characteristics. Therefore, this study aims to establish reference values for standard echocardiographic measurements in pugs by investigating the influence of age, sex, heart rate, body weight and Brachycephalic Obstructive Airway Syndrome (BOAS). Sixty-two privately owned pugs underwent physical examination, blood sample collection, non-invasive blood pressure measurements and echocardiography. Influences of independent variables on echocardiographic measurements were examined using a multiple linear regression analysis model. For the entire study population, 95% prediction intervals were generated. Further, reference ranges for subcategories of clinical severities of BOAS were provided. Selected echocardiographic measurements of pugs were compared to reference values of previous studies generated from various breeds. RESULTS In the study, a total of fifty-one privately owned pugs aged between two and 10 years were included for establishing reference ranges. Mainly body weight, but also age, sex and heart rate had influence on several echocardiographic parameters. The clinical grading of BOAS was conducted in 42 pugs. Except for pulmonic peak velocity (Pvel), which declined with increasing severity of BOAS, clinical symptoms of upper airway disease did not have significant impact on echocardiographic measurement results. Significant deviations, however, of left ventricular (LV) internal dimension (LVID), interventricular septum (IVS), LV posterior wall (LVPW), and tricuspid annular plane systolic motion excursion (TAPSE) compared to interbreed reference values were observed. CONCLUSIONS Breed-specific reference ranges for echocardiographic values with special regard to BOAS are provided to enable a more accurate assessment of cardiac health in pugs.
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Affiliation(s)
- Pia Saskia Wiegel
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany
| | - Ingo Nolte
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany.
| | - Rebekka Mach
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany
| | - Fritjof Freise
- Institute for Biometry, Epidemiology and Information Processing, University of Veterinary Medicine Hannover, Bünteweg 2, 30559, Hannover, Germany
| | - Jan-Peter Bach
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Bünteweg 9, 30559, Hannover, Germany
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22
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Mach R, Wiegel PS, Bach JP, Beyerbach M, Kreienbrock L, Nolte I. Evaluation of a Treadmill-Based Submaximal Fitness Test in Pugs, and Collecting Breed-Specific Information on Brachycephalic Obstructive Airway Syndrome. Animals (Basel) 2022; 12:ani12121585. [PMID: 35739921 PMCID: PMC9219451 DOI: 10.3390/ani12121585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 06/09/2022] [Accepted: 06/16/2022] [Indexed: 11/21/2022] Open
Abstract
Simple Summary In the present study, a submaximal fitness test on a treadmill was evaluated to assess its feasibility under standardised conditions. Moreover, its effectiveness in identifying pugs with clinical signs of brachycephalic obstructive airway syndrome was examined. It was apparent that respiratory symptoms can be exposed during the fitness test, and intensified with an increased duration of exercise. This method of testing improves the clinical evaluation of the dogs and helps identify restrictions due to brachycephalic obstructive airway syndrome. Since most of the dogs could be familiarised with the treadmill, it may be a feasible option for performing fitness tests in brachycephalic dogs. Major benefits, therefore, are that each dog can be closely monitored during the entire process, and that the examination can be conducted under standardised conditions. Abstract Despite efforts of veterinarians and breeders, brachycephalic obstructive airway syndrome (BOAS) is still a common problem in pugs, underlining the need for objective tests to identify and prevent breeding with affected dogs. In the current study, a submaximal, treadmill-based fitness test was evaluated as a tool to identify signs of airway obstruction not recognisable under rest conditions. In addition to this, different body conformation and measurements were assessed regarding their association with BOAS. A total of 62 pugs and 10 mesocephalic dogs trotted with an individual comfort speed on a treadmill for 15 min. Before and during the examination, dogs were examined for signs of respiratory distress, and a functional BOAS grading was applied. The influence of body conformation on BOAS grading was tested in a univariable and multivariable logistic regression model. During exercise, more respiratory noises were observed, and existing respiratory noises became more apparent in comparison to when at rest. In the multivariable logistic regression model, no factor had a statistically significant influence on BOAS classification. Submaximal fitness testing helped to identify signs of respiratory distress not apparent under resting conditions, and could be a valuable addition for identifying dogs with BOAS. Performing testing on a treadmill facilitates continuous observation of the patients, and enables standardisation of the test regarding the test environment, as well as provides an uninterrupted, steady workload.
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Affiliation(s)
- Rebekka Mach
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany; (P.S.W.); (J.-P.B.)
- Correspondence: (R.M.); (I.N.)
| | - Pia S. Wiegel
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany; (P.S.W.); (J.-P.B.)
| | - Jan-Peter Bach
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany; (P.S.W.); (J.-P.B.)
| | - Martin Beyerbach
- Institute for Biometry, Epidemiology and Information Processing, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany; (M.B.); (L.K.)
| | - Lothar Kreienbrock
- Institute for Biometry, Epidemiology and Information Processing, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany; (M.B.); (L.K.)
| | - Ingo Nolte
- Clinic for Small Animals, University of Veterinary Medicine Hannover, Foundation, 30559 Hannover, Germany; (P.S.W.); (J.-P.B.)
- Correspondence: (R.M.); (I.N.)
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O’Neill DG, Skipper A, Packer RMA, Lacey C, Brodbelt DC, Church DB, Pegram C. English Bulldogs in the UK: a VetCompass study of their disorder predispositions and protections. Canine Med Genet 2022; 9:5. [PMID: 35701824 PMCID: PMC9199211 DOI: 10.1186/s40575-022-00118-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 04/07/2022] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND The English Bulldog has risen sharply in popularity over the past decade but its distinctive and extreme conformation is linked to several serious health conditions. Using multivariable analysis of anonymised veterinary clinical data from the VetCompass Programme, this study compared the odds of common disorders between English Bulldogs and all remaining dogs in the UK during 2016. RESULTS From 905,544 dogs under veterinary care during 2016, the analysis included a random sample of 2,662 English Bulldogs and 22,039 dogs that are not English Bulldogs. English Bulldogs had 2.04 times the odds of diagnosis with ≥ 1 disorder than dogs that are not English Bulldogs (95% confidence interval [CI] 1.85 to 2.25). At a specific-level of diagnostic precision, English Bulldogs had increased odds of 24/43 (55.8%) disorders. These included: skin fold dermatitis (odds ratio [OR] 38.12; 95% CI 26.86 to 54.10), prolapsed nictitating membrane gland (OR 26.79; 95% CI 18.61 to 38.58) and mandibular prognathism (OR 24.32; 95% CI 13.59 to 43.53). Conversely, English Bulldogs had significantly reduced odds of 6/43 (14.0%) disorders. These included: retained deciduous tooth (OR 0.02; 95% CI 0.01 to 0.17), lipoma (OR 0.06; 95% CI 0.01 to 0.40) and periodontal disease (OR 0.23; 95% CI 0.18 to 0.30). At a grouped-level of diagnostic precision, English Bulldogs had significantly increased odds of 17/34 (50.0%) disorders. These included: congenital disorder (OR 7.55; 95% CI 5.29 to 10.76), tail disorder (OR 6.01; 95% CI 3.91 to 9.24) and lower respiratory tract disorder (OR 5.50; 95% CI 4.11 to 7.35). Conversely, English Bulldogs had significantly reduced odds of 3/34 (8.8%) disorders. These were: dental disorder (OR 0.25; 95% CI 0.20 to 0.31), spinal cord disorder (OR 0.31; 95% CI 0.14 to 0.71) and appetite disorder (OR 0.43; 95% CI 0.20 to 0.91). CONCLUSIONS These results suggest that the health of English Bulldogs is substantially lower than dogs that are not English Bulldogs and that many predispositions in the breed are driven by the extreme conformation of these dogs. Consequently, immediate redefinition of the breed towards a moderate conformation is strongly advocated to avoid the UK joining the growing list of countries where breeding of English Bulldogs is banned.
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Affiliation(s)
- Dan G. O’Neill
- grid.20931.390000 0004 0425 573XPathobiology and Population Sciences, The Royal Veterinary College, North Mymms, Hawkshead Lane, Hatfield, AL9 7TA Herts UK
| | - Alison Skipper
- grid.13097.3c0000 0001 2322 6764Department of History, King’s College London, Strand, London, WC2R 2LS UK
| | - Rowena M. A. Packer
- grid.20931.390000 0004 0425 573XClinical Science and Services, The Royal Veterinary College, North Mymms, Hawkshead Lane, Hatfield, AL9 7TA Herts UK
| | - Caitriona Lacey
- grid.20931.390000 0004 0425 573XPathobiology and Population Sciences, The Royal Veterinary College, North Mymms, Hawkshead Lane, Hatfield, AL9 7TA Herts UK
| | - Dave C. Brodbelt
- grid.20931.390000 0004 0425 573XPathobiology and Population Sciences, The Royal Veterinary College, North Mymms, Hawkshead Lane, Hatfield, AL9 7TA Herts UK
| | - David B. Church
- grid.20931.390000 0004 0425 573XClinical Science and Services, The Royal Veterinary College, North Mymms, Hawkshead Lane, Hatfield, AL9 7TA Herts UK
| | - Camilla Pegram
- grid.20931.390000 0004 0425 573XPathobiology and Population Sciences, The Royal Veterinary College, North Mymms, Hawkshead Lane, Hatfield, AL9 7TA Herts UK
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Pennington C, Kurosawa TA, Navarro-Cubas X, Bristow P. Use of the Functional Evaluation of Cardiac Health questionnaire to assess health-related quality of life before and after mitral valve repair in dogs with myxomatous mitral valve disease. J Am Vet Med Assoc 2022; 260:1806-1812. [PMID: 35594202 DOI: 10.2460/javma.22.02.0053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine changes in health-related quality of life up to 12 months after surgery in dogs with myxomatous mitral valve disease that undergo mitral valve repair. ANIMALS 54 dogs that underwent mitral valve repair at a United Kingdom referral hospital. PROCEDURES Health-related quality of life was assessed with a previously validated, owner-completed questionnaire before and 1, 3, 6, and 12 months after surgery. Results There was a significant decrease in total score (corresponding to reduced negative impact of cardiac disease on quality of life) between the preoperative timepoint and all postoperative timepoints. A significant decrease in total score was also demonstrated between the 1- and 3-month timepoints, but no additional significant changes in total score between adjacent timepoints were identified beyond 3 months after surgery. Significant improvements in individual question scores were found up to 12 months after surgery. CLINICAL RELEVANCE Health-related quality of life was significantly improved following mitral valve repair in dogs with myxomatous mitral valve disease and this improvement persisted for up to a year after surgery. These results may be useful when counseling owners of dogs considered candidates for this procedure.
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Affiliation(s)
- Catrina Pennington
- 1Small Animal Teaching Hospital, School of Veterinary Science, University of Liverpool, Wirral, UK
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Holloway GL, Higgins J, Beranek JP. Split staphylectomy to address soft palate thickness in brachycephalic dogs: 75 cases (2016-2018). J Small Anim Pract 2022; 63:460-467. [PMID: 35137415 DOI: 10.1111/jsap.13485] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 01/19/2022] [Accepted: 01/19/2022] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Describe the split staphylectomy procedure to address soft palate thickness and assess the complications and long-term outcome of this procedure as a part of multi-level surgery for brachycephalic obstructive airway syndrome. To consider whether same-day discharge following this surgery can be recommended. MATERIALS AND METHODS Medical records of dogs treated for brachycephalic obstructive airway syndrome using the split staphylectomy were reviewed. Owners were contacted to complete a questionnaire assessing initial postoperative concerns, the long-term outcome and the effect of surgery on their dog's quality of life. RESULTS Seventy-five dogs underwent split staphylectomy during the study period. The overall complication rate was 8.3%, of which 2.7% were considered major. No life-threatening complications occurred, and no complications were related to the staphylectomy. The questionnaire was completed by 66.7% of owners (median follow-up 459 days), of which 88% felt that surgery had improved the quality of life for their dog. The majority (88%) of dogs were discharged from hospital on the day of surgery. Of the surveyed owners, 14% sought veterinary attention between their dog leaving the hospital and the scheduled postoperative reassessment 2 weeks after surgery. Four dogs were presented for veterinary intervention during this time period, but no intervention was related to the staphylectomy or for a life-threatening condition. CLINICAL SIGNIFICANCE The split staphylectomy offers a safe, straightforward method of addressing both excess thickness and length of soft palate in dogs with brachycephalic obstructive airway syndrome. Dogs can be discharged on the same day as brachycephalic obstructive airway syndrome surgery including split staphylectomy without an increased risk of complications.
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Affiliation(s)
| | - J Higgins
- Kentdale Referrals, Cumbria, LA7 7NU, UK
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Phillips H. Updates in Upper Respiratory Surgery. Vet Clin North Am Small Anim Pract 2022; 52:339-368. [DOI: 10.1016/j.cvsm.2021.12.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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O'Neill DG, Packer RMA, Francis P, Church DB, Brodbelt DC, Pegram C. French Bulldogs differ to other dogs in the UK in propensity for many common disorders: a VetCompass study. Canine Med Genet 2021; 8:13. [PMID: 34911586 PMCID: PMC8675495 DOI: 10.1186/s40575-021-00112-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2021] [Accepted: 11/05/2021] [Indexed: 11/20/2022] Open
Abstract
Background The French Bulldog is a highly popular dog breed but is linked with many serious health issues. A holistic view of breed health in French Bulldogs would assist efforts to appreciate the overall health strengths and weaknesses in the French Bulldog and to take appropriate steps to mitigate these. Based on random sampling of French Bulldogs and non-French Bulldogs under primary veterinary care during 2016 within the VetCompass Programme, a cohort study design was used to estimate the one-year (2016) period prevalence of the most commonly diagnosed disorders in each group. Risk factor analysis used multivariable logistic regression modelling methods. Results The analysis included 2,781 French Bulldogs and 21,850 non-French Bulldogs. French Bulldogs were younger (1.51 years, IQR 0.86 – 2.77 vs. 4.48 years, IQR 1.94 – 8.14) (p < 0.001) and lighter (12.45 kg, IQR 11.00 – 14.03 versus 13.80 kg, IQR 8.10 – 25.12) (p < 0.001) than non-French Bulldogs. Of 43 common specific-level disorders across both groups, French Bulldogs had significantly increased adjusted odds of 20/43 (46.5 %) disorders and significantly reduced adjusted odds of 11/43 (25.6 %) disorders compared to non-French Bulldogs. Highly predisposed disorders in French Bulldogs included stenotic nares (OR 42.14; 95 % CI 18.50 to 95.99; p < 0.001), Brachycephalic Obstructive Airway Syndrome (OR 30.89; 95 % CI 20.91 to 45.64; p < 0.001), aural discharge (OR 14.40; 95 % CI 9.08 to 22.86; p < 0.001), skin fold dermatitis (OR 11.18; 95 % CI 7.19 to 17.40; p < 0.001) and dystocia (OR 9.13; 95 % CI 5.17 to 16.13; p < 0.001). At a grouped-level of diagnostic precision, French Bulldogs had increased adjusted odds of 12/32 (37.5 %) disorders and reduced adjusted odds of 6/32 (18.8 %) disorders compared to non-French Bulldogs. Conclusions These results identified ultra-predispositions with worryingly higher odds in French Bulldogs for several disorders, suggesting that the health of French Bulldogs has diverged substantially from, and may be lower than, the health of the wider non-French Bulldog population. Many of these predispositions are closely associated with the conformational extremes that define the French Bulldog breed. Shifting the typical conformation of the French Bulldog population towards a more moderate phenotype is proposed as a logical opportunity to reduce the serious health issues endemic in the French Bulldog breed. The French Bulldog is currently a hugely popular dog breed in the UK. However, the breed is linked with a range of serious health issues. Using veterinary clinical data from the VetCompass Programme at the Royal Veterinary College, this study aimed to compare the frequency of common disorders in French Bulldogs against that of all remaining dogs to identify health strengths and weaknesses in French Bulldogs. This overall view of breed health can assist owners, breeders and veterinarians to take appropriate actions to improve the health of French Bulldogs. From an overall population of 905,544 dogs, random samples of 2,781 French Bulldogs and 21,850 non-French Bulldogs were included in the analysis. French Bulldogs were younger (1.51 years versus 4.48 years) and lighter (12.45 kg versus 13.80 kg) than non-French Bulldogs. French Bulldogs had increased risk of 20/43 (46.5 %) specific disorders and decreased risk of 11/43 (25.6 %) specific disorders compared to non-French Bulldogs. The disorders with greatest relative risk in French Bulldogs compared to non-French Bulldogs were narrowed nostrils (x 42.14), Brachycephalic Obstructive Airway Syndrome (x 30.89), ear discharge (x 14.40), skin fold dermatitis (x 11.18) and difficulty giving birth [dystocia] (x 9.13). When the disorders were grouped into broad disease categories, French Bulldogs had increased risk of 12/32 (37.5 %) disorder groups and reduced risk of 6/32 (18.8 %) disorder groups compared to non-French Bulldogs. This study suggests that the health of French Bulldogs is very different, and largely much poorer, that the health of the wider non-French Bulldog population. Many of these differences are closely associated with the extreme body shape that defines the French Bulldog breed. Shifting the body shape of French Bulldogs to become more moderate, and hence less extreme, is proposed as a logical opportunity to reduce the current serious and common health issues in the French Bulldog breed.
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Affiliation(s)
- Dan G O'Neill
- Pathobiology and Population Sciences, The Royal Veterinary College, Hawkshead Lane, North Mymms, AL9 7TA, Hatfield, Herts, UK.
| | - Rowena M A Packer
- Clinical Science and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, AL9 7TA, Hatfield, Herts, UK
| | - Peter Francis
- Pathobiology and Population Sciences, The Royal Veterinary College, Hawkshead Lane, North Mymms, AL9 7TA, Hatfield, Herts, UK
| | - David B Church
- Clinical Science and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, AL9 7TA, Hatfield, Herts, UK
| | - Dave C Brodbelt
- Pathobiology and Population Sciences, The Royal Veterinary College, Hawkshead Lane, North Mymms, AL9 7TA, Hatfield, Herts, UK
| | - Camilla Pegram
- Pathobiology and Population Sciences, The Royal Veterinary College, Hawkshead Lane, North Mymms, AL9 7TA, Hatfield, Herts, UK
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Gareis H, Schulz B. [Pulmonary function testing in the cat - an overview]. TIERARZTLICHE PRAXIS. AUSGABE K, KLEINTIERE/HEIMTIERE 2021; 49:441-454. [PMID: 34861722 DOI: 10.1055/a-1640-4123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
This article provides an overview of currently available pulmonary function tests in cats, divided into invasive and non-invasive methods. Invasive techniques comprise arterial blood gas analysis and measurement of pulmonary mechanics. Non-invasive techniques include pulse oximetry and capnography, as well as methods not yet integrated into everyday practice such as tidal breathing airflow-volume loops, whole-body barometric plethysmography and thorax compression. In this article, the background, execution, interpretation, and limitations of each test are discussed. Proper performance and assessment of pulmonary function measurements may aid in understanding the pathophysiology of feline respiratory disease and in increasing objectivity when assessing the existing disease and treatment efficacy.
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Affiliation(s)
- Hannah Gareis
- Medizinische Kleintierklinik, Ludwig-Maximilians-Universität München
| | - Bianka Schulz
- Medizinische Kleintierklinik, Ludwig-Maximilians-Universität München
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Johnson LR, Mayhew PD, Culp WTN, Stanley BJ. Results of owner questionnaires describing long-term outcome in Norwich terriers with upper airway syndrome: 2011-2018. J Vet Intern Med 2021; 35:1950-1956. [PMID: 34076315 PMCID: PMC8295680 DOI: 10.1111/jvim.16180] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 05/07/2021] [Accepted: 05/18/2021] [Indexed: 11/30/2022] Open
Abstract
Background Norwich terriers are affected by an upper airway syndrome (NTUAS) but little is known about outcome in affected dogs. Objective To determine outcome in dogs with NTUAS using owner questionnaires. Animals Thirty‐four client‐owned dogs. Methods At initial assessment, owners were questioned about respiratory noises and exercise tolerance. A NTUAS score was prospectively constructed based on the number and severity of obstructive lesions detected endoscopically (range, 0‐25). Owner questionnaires on respiratory noises, exercise tolerance, and quality of life (QOL) were obtained 2.2‐9.3 years (median, 4.2 years) after endoscopy. Results Dogs ranged from 0.5 to 10.7 years of age (median, 4.75 years) at initial examination and no correlation was found between age and NTUAS score (median, 13; range, 1‐25). Of 5 possible laryngeal abnormalities, 7 dogs had 1‐2, 10 dogs had 3, and 17 dogs had 4‐5 abnormalities (median, 3.5). Surgery was performed in 15 dogs, which had higher NTUAS scores (18.5 ± 6.3) than dogs that did not have surgery (7.7 ± 4.7, P < .0001). Scores for QOL ranged from 0 to 31 out of 40, with higher scores indicating worse QOL. Owner surveys resulted in QOL scores of ≤3 in 25/31 dogs (81%), with worse scores in dogs that had surgery performed (median 5, vs 0; P = .003). No correlation was noted between NTUAS and QOL scores, but age at follow‐up was weakly associated with worse QOL. Conclusions and Clinical Importance Despite variable severity of NTUAS scores, owners reported excellent QOL for most Norwich terriers examined.
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Affiliation(s)
- Lynelle R Johnson
- Department of Medicine and Epidemiology, University of California-Davis, Davis, California, USA
| | - Philipp D Mayhew
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, California, USA
| | - William T N Culp
- Department of Surgical and Radiological Sciences, University of California-Davis, Davis, California, USA
| | - Bryden J Stanley
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan, USA
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Barker DA, Tovey E, Jeffery A, Blackwell E, Tivers MS. Owner reported breathing scores, accelerometry and sleep disturbances in brachycephalic and control dogs: A pilot study. Vet Rec 2021; 189:e135. [PMID: 34403514 DOI: 10.1002/vetr.135] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2020] [Revised: 11/08/2020] [Accepted: 01/26/2021] [Indexed: 01/25/2023]
Abstract
OBJECTIVES To compare physical activity and length and quality of sleep between brachycephalic dogs and a control population. METHODS Brachycephalic and control dogs were prospectively enrolled. Length of activity and sleep were determined via accelerometer use. Owners completed a questionnaire regarding typical daily activity, sleep patterns and an 'owner reported breathing score (ORBS)'. One hour of normal home sleep was recorded for each dog, and a veterinary observer subjectively scored the dogs' sleep quality. RESULTS Twenty brachycephalic and 15 control dogs were included. There were no differences between age and weight. Owners reported brachycephalic dogs to be less active (p = 0.022) and have higher ORBS (p < 0.001) compared to control dogs. Brachycephalic dogs had increased sleep disturbances compared to control dogs (p = 0.001), and video sleep score was positively correlated with increased sleep disturbances (r2 = 0.47, p = 0.007). There were no differences in active and sleep times based on accelerometry between groups. CONCLUSION Brachycephalic dogs have more disturbed sleep, which may have negative implications on welfare, but there were no differences in activity or length of sleep between groups. There is evidence that signs suggestive of brachycephalic obstructive airway syndrome (BOAS) as assessed by ORBS is correlated with poorer sleep quality, indicating that reduced sleep quality is part of BOAS. Owners may underestimate disturbed sleep or may perceive disturbed sleep to be normal.
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Affiliation(s)
| | - Emily Tovey
- Bristol Veterinary School, University of Bristol, Langford, Bristol, UK
| | | | - Emily Blackwell
- Bristol Veterinary School, University of Bristol, Langford, Bristol, UK
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O'Neill DG, Pegram C, Crocker P, Brodbelt DC, Church DB, Packer RMA. Unravelling the health status of brachycephalic dogs in the UK using multivariable analysis. Sci Rep 2020; 10:17251. [PMID: 33057051 PMCID: PMC7560694 DOI: 10.1038/s41598-020-73088-y] [Citation(s) in RCA: 41] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 09/09/2020] [Indexed: 02/06/2023] Open
Abstract
Brachycephalic dog breeds are regularly asserted as being less healthy than non-brachycephalic breeds. Using primary-care veterinary clinical data, this study aimed to identify predispositions and protections in brachycephalic dogs and explore differing inferences between univariable and multivariable results. All disorders during 2016 were extracted from a random sample of 22,333 dogs within the VetCompass Programme from a sampling frame of 955,554 dogs under UK veterinary care in 2016. Univariable and multivariable binary logistic regression modelling explored brachycephaly as a risk factor for each of a series of common disorders. Brachycephalic dogs were younger, lighter and less likely to be neutered than mesocephalic, dolichocephalic and crossbred dogs. Brachycephalic differed to non-brachycephalic types in their odds for 10/30 (33.33%) common disorders. Of these, brachycephalic types were predisposed for eight disorders and were protected for two disorders. Univariable and multivariable analyses generated differing inference for 11/30 (30.67%) disorders. This study provides strong evidence that brachycephalic breeds are generally less healthy than their non-brachycephalic counterparts. Results from studies that report only univariable methods should be treated with extreme caution due to potential confounding effects that have not been accounted for during univariable study design or analysis.
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Affiliation(s)
- D G O'Neill
- Pathobiology and Population Sciences, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK.
| | - C Pegram
- Pathobiology and Population Sciences, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK
| | - P Crocker
- Pathobiology and Population Sciences, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK
| | - D C Brodbelt
- Pathobiology and Population Sciences, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK
| | - D B Church
- Clinical Sciences and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK
| | - R M A Packer
- Clinical Sciences and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, AL9 7TA, Herts, UK
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Franklin PH, Liu NC, Ladlow JF. Nebulization of epinephrine to reduce the severity of brachycephalic obstructive airway syndrome in dogs. Vet Surg 2020; 50:62-70. [PMID: 33044024 DOI: 10.1111/vsu.13523] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 08/22/2020] [Accepted: 09/01/2020] [Indexed: 12/31/2022]
Abstract
OBJECTIVE To determine the preoperative and postoperative effect of nebulized epinephrine on brachycephalic obstructive airway syndrome (BOAS) severity in dogs. STUDY DESIGN Prospective clinical study. SAMPLE POPULATION Thirty-one client-owned pugs, French bulldogs, and English bulldogs with moderate to severe BOAS. METHODS Whole body barometric plethysmography was used to determine BOAS severity (BOAS index; 0%-100%) prior to and after nebulization with 0.05 mg/kg epinephrine diluted in 0.9% saline preoperatively. The same protocol was repeated postoperatively (within 24 hours of surgery). RESULTS Five dogs were excluded because they did not tolerate nebulization, and postoperative data were available for 13 dogs. Epinephrine nebulization resulted in a decreased BOAS index across all breeds of dog both before (9.6% [3.1% to -30.2%], n = 26) and after surgery (14.3% [0.9% to -24.3%], n = 13). The preoperative reduction in BOAS index was greater (17.3% [1.8% to -27.4%]) in dogs with a baseline BOAS index >70% (P = .006) and in pugs (16.9% [0.8% to -27.4%]) compared with French bulldogs (5.2% [3.1% to -30.2%], P = .03). Simple linear regression was used to identify a positive relationship between baseline BOAS index and reduction in BOAS index for pugs (n = 10, P = .001). Nausea was noted as a side effect in four dogs. CONCLUSION Nebulized epinephrine reduced the BOAS index of dogs in this study. This effect was clinically significant in preoperative dogs with a BOAS index >70% and in dogs recovering from surgery. CLINICAL SIGNIFICANCE This study provides evidence to support the use of nebulized epinephrine in the perioperative management of BOAS-affected dogs.
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Affiliation(s)
- Phil H Franklin
- Queen's Veterinary School Hospital, University of Cambridge, Cambridge, United Kingdom
| | - Nai-Chieh Liu
- Queen's Veterinary School Hospital, University of Cambridge, Cambridge, United Kingdom
| | - Jane F Ladlow
- Queen's Veterinary School Hospital, University of Cambridge, Cambridge, United Kingdom
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Rondelli V, Guarracino A, Iacobellis P, Grasso S, Stripoli T, Lacitignola L, Auriemma E, Romano F, Araos JD, Staffieri F. Evaluation of the effects of helmet continuous positive airway pressure on laryngeal size in dogs anesthetized with propofol and fentanyl using computed tomography. J Vet Emerg Crit Care (San Antonio) 2020; 30:543-549. [PMID: 32649044 DOI: 10.1111/vec.12977] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Revised: 03/31/2019] [Accepted: 04/29/2019] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To evaluate the effect of 5 cm H2 O of continuous positive airway pressure (CPAP) on laryngeal size in spontaneously breathing anesthetized dogs via computed tomography (CT). DESIGN Prospective, randomized, cross-over clinical study. SETTING University teaching hospital and referral private practice. ANIMALS Eight healthy client-owned dogs undergoing CT. INTERVENTIONS Dogs were sedated with acepromazine 20 μg/kg IM and induced with fentanyl 2 μg/kg and propofol 3-5 mg/kg IV before being maintained on fentanyl (5 μg/kg/h) and propofol (0.3 mg/kg/min) constant rate infusion. Dogs received an air/oxygen mixture with (CPAP) and without (NO-CPAP) 5 cm H2 O of CPAP in a random order. Each study step lasted 15 minutes. MEASUREMENTS AND MAIN RESULTS Ten minutes after the beginning of each study period, a CT scan of the laryngeal region was obtained at end-expiration. CT images were analyzed to determine the laryngeal cross-sectional area (CSA; cm2 ), total volume (VTOT ; cm3 ), and laterolateral and dorsoventral diameters (DLL and DDV , respectively; cm). Differences between the 2 treatments were analyzed with t-test for paired data (P < 0.05). Compared to the NO-CPAP, during CPAP the CSA increased by 53.3 ± 23.1% (ie, from 3.3 ± 0.8 to 5.1 ± 1.3 cm2 , P = 0.0004), VTOT increased by 52.4 ± 13.6% (from 6.2 ± 1.7 to 9.4 ± 2.4 cm3 , P < 0.0001), and DLL and DDV were 55.5 ± 13.3% (3.6 ± 0.8 vs 2.4 ± 0.5 cm, P = 0.006) and 20.3 ± 8.8% larger (3.2 ± 0.7 vs 2.7 ± 0.6 cm, P = 0.0002), respectively. CONCLUSIONS Laryngeal volume and cross sectional area increased during the application of 5 cm H2 O of helmet CPAP in spontaneously breathing anesthetized dogs.
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Affiliation(s)
| | - Alessandro Guarracino
- Section of Veterinary Clinics and Animal Production, Department of Emergency and Organ Transplants, University of Bari Aldo Moro, Bari, Italy
| | - Pierpaolo Iacobellis
- Section of Veterinary Clinics and Animal Production, Department of Emergency and Organ Transplants, University of Bari Aldo Moro, Bari, Italy
| | - Salvatore Grasso
- Section of Anesthesia and Intensive Care, Department of Emergency and Organ Transplants, University of Bari Aldo Moro, Bari, Italy
| | - Tania Stripoli
- Section of Anesthesia and Intensive Care, Department of Emergency and Organ Transplants, University of Bari Aldo Moro, Bari, Italy
| | - Luca Lacitignola
- Section of Veterinary Clinics and Animal Production, Department of Emergency and Organ Transplants, University of Bari Aldo Moro, Bari, Italy
| | | | | | - Joaquin D Araos
- Centre Hospitalier Universitaire Veterinaire, Faculte de Medecine Veterinaire, Universite de Montreal, Montreal, Québec, Canada
| | - Francesco Staffieri
- Section of Veterinary Clinics and Animal Production, Department of Emergency and Organ Transplants, University of Bari Aldo Moro, Bari, Italy
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Wagner F, Ruf I. "Forever young"-Postnatal growth inhibition of the turbinal skeleton in brachycephalic dog breeds (Canis lupus familiaris). Anat Rec (Hoboken) 2020; 304:154-189. [PMID: 32462796 DOI: 10.1002/ar.24422] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 02/21/2020] [Accepted: 03/07/2020] [Indexed: 02/05/2023]
Abstract
In short snouted (brachycephalic) dogs (Canis lupus familiaris), several genetic mutations cause postnatal growth inhibition of the viscerocranium. Thus, for example, the pug keeps a snub nose like that observed in neonate dogs in general. However, little is known how far intranasal structures like the turbinal skeleton are also affected. In the present study, we provide the first detailed morphological and morphometric analyses on the turbinal skeleton of pug, Japanese chin, pekingese, King Charles spaniel, and Cavalier. In order to elucidate how a shortened snout affects turbinal shape, size, and density, our sample covers different degrees of brachycephaly. Macerated skulls of 1 juvenile and 17 adult individuals were investigated by μCT and virtual 3D reconstructions. In addition, histological serial sections of two prenatal and one neonate whippet were taken into account. All investigated postnatal stages show three frontoturbinals and three ethmoturbinals similar to longer snouted breeds, whereas the number of interturbinals is reduced. The shape of the entire turbinal skeleton simplifies with decreasing snout length, that is, within a minimized nasal cavity the turbinals decrease proportionally in surface area and surface density due to a looser arrangement. We interpret these apparent reductions as a result of spatial constraint which affects postnatal appositional bone growth and the position of the turbinals inside the nasal cavity. The turbinal skeleton of brachycephalic dogs arrests at an early ontogenetic stage, corresponding with previous studies on the dermal bones. Hence, we assume an association between the growth of intranasal structures and facial elongation.
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Affiliation(s)
- Franziska Wagner
- Abteilung Messelforschung und Mammalogie, Senckenberg Forschungsinstitut und Naturmuseum Frankfurt, Frankfurt am Main, Germany.,Museum für Tierkunde, Senckenberg Naturhistorische Sammlungen Dresden, Dresden, Germany
| | - Irina Ruf
- Abteilung Messelforschung und Mammalogie, Senckenberg Forschungsinstitut und Naturmuseum Frankfurt, Frankfurt am Main, Germany
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Balakrishnan A, Tong CW. Clinical Application of Pulmonary Function Testing in Small Animals. Vet Clin North Am Small Anim Pract 2019; 50:273-294. [PMID: 31858992 DOI: 10.1016/j.cvsm.2019.10.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Pulmonary function tests (PFTs) are important diagnostic tools that have wide clinical applications in human and veterinary medicine. Widespread use of PFTs in measuring lung volumes in veterinary medicine was historically limited by the need for specialized equipment to accurately perform and interpret these tests, and by lack of patient cooperation. However, recent advances and modifications have allowed PFTs to be safely performed in conscious veterinary patients with minimal stress. This article focuses on the most commonly used tests of pulmonary function including tests of pulmonary mechanics and of gas exchange in the lungs.
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Affiliation(s)
- Anusha Balakrishnan
- Emergency and Critical Care, Cornell University Veterinary Specialists, 880 Canal Street, Stamford, CT 06902, USA; Emergency and Critical Care, Cornell University College of Veterinary Medicine, Ithaca, NY, USA.
| | - Carissa W Tong
- Emergency and Critical Care, Cornell University Veterinary Specialists, 880 Canal Street, Stamford, CT 06902, USA
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Knowler SP, Dumas E, Spiteri M, McFadyen AK, Stringer F, Wells K, Rusbridge C. Facial changes related to brachycephaly in Cavalier King Charles Spaniels with Chiari-like malformation associated pain and secondary syringomyelia. J Vet Intern Med 2019; 34:237-246. [PMID: 31691386 PMCID: PMC6979263 DOI: 10.1111/jvim.15632] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Accepted: 09/23/2019] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND Recent studies including an innovative machine learning technique indicated Chiari-like malformation (CM) is influenced by brachycephalic features. OBJECTIVES Morphometric analysis of facial anatomy and dysmorphia in CM-associated pain (CM-P) and syringomyelia (SM) in the Cavalier King Charles Spaniel (CKCS). ANIMALS Sixty-six client-owned CKCS. METHODS Retrospective study of anonymized T2W sagittal magnetic resonance imaging of 3 clinical groups: (1) 11 without central canal dilation (ccd) or SM (CM-N), (2) 15 with CM-P with no SM or <2 mm ccd (CM-P), and (3) 40 with syrinx width ≥4 mm (SM-S). Morphometric analysis assessed rostral skull flattening and position of the hard and soft palate relative to the cranial base in each clinical group and compared CKCS with and without SM-S. RESULTS Sixteen of 28 measured variables were associated to SM-S compared to CM-N and CM-P. Of these 6 were common to both groups. Predictive variables determined by discriminant analysis were (1) the ratio of cranial height with cranial length (P < .001 between SM-S and CM-N) and (2) the distance between the cerebrum and the frontal bone (P < .001 between SM-S and CM-P). CM-P had the lowest mean height of the maxillary area. CONCLUSIONS AND CLINICAL IMPORTANCE CKCS with CM-P and SM-S have cranial brachycephaly with osseous insufficiency in the skull with rostral flattening and increased proximity of the hard and soft palate to the cranial base. Changes are greatest with CM-P. These findings have relevance for understanding disease pathogenesis and for selection of head conformation for breeding purposes.
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Affiliation(s)
- Susan P Knowler
- School of Veterinary Medicine, Faculty of Health & Medical Sciences, Daphne Jackson Road, Guildford, Surrey, GU7 Q22, United Kingdom
| | - Eleonore Dumas
- School of Veterinary Medicine, Faculty of Health & Medical Sciences, Daphne Jackson Road, Guildford, Surrey, GU7 Q22, United Kingdom
| | - Michaela Spiteri
- Centre for Vision, Speech, and Signal Processing, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | | | - Felicity Stringer
- Fitzpatrick Referrals Orthopaedics and Neurology, Halfway Lane, Eashing, Godalming, Surrey, GU7 Q22, United Kingdom
| | - Kevin Wells
- Centre for Vision, Speech, and Signal Processing, University of Surrey, Guildford, GU2 7XH, United Kingdom
| | - Clare Rusbridge
- School of Veterinary Medicine, Faculty of Health & Medical Sciences, Daphne Jackson Road, Guildford, Surrey, GU7 Q22, United Kingdom.,Fitzpatrick Referrals Orthopaedics and Neurology, Halfway Lane, Eashing, Godalming, Surrey, GU7 Q22, United Kingdom
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Jones BA, Stanley BJ, Nelson NC. The impact of tongue dimension on air volume in brachycephalic dogs. Vet Surg 2019; 49:512-520. [PMID: 31361346 DOI: 10.1111/vsu.13302] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Revised: 06/28/2019] [Accepted: 07/16/2019] [Indexed: 12/25/2022]
Abstract
OBJECTIVE To compare the dimensions and density of the tongue in brachycephalic and mesaticephalic dog breeds and to document the relative extents of the nasopharyngeal and oropharyngeal airways occupied by the tongue and palatal tissues. STUDY DESIGN Case control study. ANIMALS Sixteen brachycephalic dogs and 12 mesaticephalic dogs. METHODS The volume of the tongue was measured with computed tomography in all dogs. Cross-sectional areas of tongue, oropharynx, nasopharynx, and palatal soft tissue were evaluated at two levels, the caudal aspect of the hard palate and the level of the hamulae of the pterygoid. Density of the tongue and soft palate were measured. All variables were compared between brachycephalic and mesaticephalic dogs (P ≤ .05). RESULTS Absolute tongue volumes did not differ between groups, the volume of the tongue was greater in brachycephalic dogs than in mesaticephalic dogs when expressed relative to (a) body weight (median 5650, interquartile range [IQR] 4833-6522 vs median 4454, IQR 4309-4743, respectively), (b) ratio between skull length/width (70 833, IQR 62490-126 209 vs 48 064, IQR 22984-64 279, respectively), and (c) skull length (689.93, IQR 618.55-970.61 vs 460.04, IQR 288.77-561.69, respectively). The proportion of air (oropharyngeal and nasopharyngeal)/soft tissue (tongue and palatal tissue) in brachycephalic dogs was decreased by approximately 60%, and the tongue was approximately 10 times denser in brachycephalic dogs than in mesaticephalic dogs. CONCLUSION A relative macroglossia was detected in brachycephalic dogs along with reduced air volume in the upper airway. Tongues of brachycephalic dogs were denser than those of mesaticephalic dogs. CLINICAL SIGNIFICANCE The relative macroglossia in brachycephalic breeds may contribute to upper airway obstruction.
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Affiliation(s)
- Brittani A Jones
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan
| | - Bryden J Stanley
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan
| | - Nathan C Nelson
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina
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Tarricone J, Hayes GM, Singh A, Davis G. Development and validation of a brachycephalic risk (BRisk) score to predict the risk of complications in dogs presenting for surgical treatment of brachycephalic obstructive airway syndrome. Vet Surg 2019; 48:1253-1261. [PMID: 31350865 DOI: 10.1111/vsu.13291] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 05/31/2019] [Accepted: 06/22/2019] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To develop and validate a preoperative brachycephalic risk (BRisk) score that objectively and accurately predicts the risk of major complications or death in dogs undergoing corrective surgery for brachycephalic obstructive airway syndrome (BOAS). STUDY DESIGN Retrospective multicenter cohort study. SAMPLE POPULATION Score development n = 233 dogs, validation n = 50 dogs. METHODS Data were collected on signalment, medical history, reason for presentation, physical examination, and preoperative diagnostic findings. The primary outcome measures included risk of major complications (requirement for postoperative oxygen support for >48 hours or postoperative temporary/permanent tracheostomy) or death within the hospitalization period. The score was developed by using data from two centers and was validated in a third center. The 10-point BRisk score was modeled on breed, history of previous surgery, concurrent procedures, body condition score, airway status, and admission rectal temperature. RESULTS The score was associated with negative outcome (P < .0001) and discriminated well in both the construction (area under the receiver operator characteristic [AUROC] = 0.83) and validation groups (AUROC = 0.84). Dogs with scores >3 were 9.1 times more likely to have a negative outcome (95% CI = 3.9-21.2) compared with dogs with scores ≤3. CONCLUSION The BRisk score developed from admission data in this study accurately rated the risk of negative outcome of dogs undergoing corrective surgery for BOAS. CLINICAL SIGNIFICANCE Preoperative determination of the BRisk score may assist triage, management of owner expectations, decision making regarding intervention selection, and characterization of populations in clinical research.
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Affiliation(s)
- Jason Tarricone
- Small animal surgery, Red Bank Hospital, Red Bank, New Jersey
| | - Galina M Hayes
- Small animal surgery, Cornell University, Ithaca, New York
| | - Ameet Singh
- Small animal surgery, Ontario Veterinary College, Guelph, Ontario, Canada
| | - Garrett Davis
- Small animal surgery, Red Bank Hospital, Red Bank, New Jersey
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O’Neill DG, Skipper AM, Kadhim J, Church DB, Brodbelt DC, Packer RMA. Disorders of Bulldogs under primary veterinary care in the UK in 2013. PLoS One 2019; 14:e0217928. [PMID: 31188857 PMCID: PMC6561557 DOI: 10.1371/journal.pone.0217928] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 05/21/2019] [Indexed: 02/07/2023] Open
Abstract
The Bulldog is a popular companion breed in the UK despite widely reported disease predispositions. This study aimed to characterise the demography, mortality and common disorders of Bulldogs under veterinary care in the UK during 2013. VetCompass collates anonymised clinical data from UK primary-care veterinary practices for epidemiological research. The clinical records of all Bulldogs available in the VetCompass study dataset were reviewed manually in detail to extract the most definitive diagnoses recorded for all disorders that existed during 2013 and for all deaths. Bulldogs comprised 1621 (0.36%) of 445,557 study dogs. Bulldogs increased from 0.35% of the 2009 birth cohort to 0.60% in 2013. Median longevity was 7.2 years, which was lower in males (6.7 years) than females (7.9 years) (P = 0.021). The most prevalent fine-level precision disorders recorded were otitis externa (n = 206, prevalence 12.7%, 95% CI: 11.1–14.4), pyoderma (142, 8.8%, 95% CI: 7.4–10.2) and overweight/obesity (141, 8.7%, 95% CI: 7.4–10.2). The most prevalent disorder groups were cutaneous (n = 463, prevalence: 28.6%, 95% CI: 26.4–30.8), ophthalmological (292, 18.0%, 95% CI: 16.2–20.0), aural (211, 13.0%, 95% CI: 11.4–14.8), enteropathy (188, 11.6%, 95% CI: 10.1–13.3) and upper respiratory tract (171, 10.5%, 95% CI: 9.1–12.1). Provision of an evidence base on the most common disorders and causes of mortality within breeds can support owners, breeders and the veterinary profession to improve health and welfare within these breed.
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Affiliation(s)
- Dan G. O’Neill
- Pathobiology and Population Science, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, United Kingdom
- * E-mail:
| | - Alison M. Skipper
- Department of History, King’s College London, Strand, London, United Kingdom
| | - Jade Kadhim
- Pathobiology and Population Science, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, United Kingdom
| | - David B. Church
- Clinical Sciences and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, United Kingdom
| | - Dave C. Brodbelt
- Pathobiology and Population Science, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, United Kingdom
| | - Rowena M. A. Packer
- Clinical Sciences and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Hertfordshire, United Kingdom
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An ADAMTS3 missense variant is associated with Norwich Terrier upper airway syndrome. PLoS Genet 2019; 15:e1008102. [PMID: 31095560 PMCID: PMC6521993 DOI: 10.1371/journal.pgen.1008102] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 03/19/2019] [Indexed: 11/19/2022] Open
Abstract
In flat-faced dog breeds, air resistance caused by skull conformation is believed to be a major determinant of Brachycephalic Obstructive Airway Syndrome (BOAS). The clinical presentation of BOAS is heterogeneous, suggesting determinants independent of skull conformation contribute to airway disease. Norwich Terriers, a mesocephalic breed, are predisposed to Upper Airway Syndrome (UAS), a disease whose pathological features overlap with BOAS. Our health screening clinic examined and scored the airways of 401 Norwich terriers by laryngoscopy. Genome-wide association analyses of UAS-related pathologies revealed a genetic association on canine chromosome 13 (rs9043975, p = 7.79x10-16). Whole genome resequencing was used to identify causal variant(s) within a 414 kb critical interval. This approach highlighted an error in the CanFam3.1 dog assembly, which when resolved, led to the discovery of a c.2786G>A missense variant in exon 20 of the positional candidate gene, ADAM metallopeptidase with thrombospondin type 1 motif 3 (ADAMTS3). In addition to segregating with UAS amongst Norwich Terriers, the ADAMTS3 c.2786G>A risk allele frequency was enriched among the BOAS-susceptible French and (English) Bulldogs. Previous studies indicate that ADAMTS3 loss of function results in lymphoedema. Our results suggest a new paradigm in the understanding of canine upper airway disease aetiology: airway oedema caused by disruption of ADAMTS3 predisposes dogs to respiratory obstruction. These findings will enhance breeding practices and could refine the prognostics of surgical interventions that are often used to treat airway obstruction. Respiratory diseases are prevalent across dog breeds, particularly in brachycephalic breeds such as the Bulldog and French bulldog. The flat facial conformation of these breeds has long been assumed to be the major predisposing factor, however, the underlying genetics of their respiratory condition has never been elucidated. We became interested in the Norwich Terrier, a breed presenting with many of the same respiratory disease symptoms as the Bulldog. A distinction, however, is that the Norwich terrier is not considered to be a brachycephalic breed and so presented an opportunity to dissociate respiratory disease from head conformation. We performed a genome-wide association analysis for respiratory disease severity in the Norwich Terrier and resolved an association on chromosome 13 to a missense mutation in ADAMTS3. Variants in this gene were previously shown to cause an oedematous phenotype–a disease characteristic in the airways of affected Norwich Terriers and brachycephalic dogs alike. We screened over 100 breeds for the ADAMTS3 variant and found that it is enriched in the Norwich Terrier, Bulldog and French Bulldog. This discovery changes how we view respiratory disease predisposition in the dog, offers potential genetic screens and highlights a new biological function for ADAMTS3.
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Kirsch MS, Spector D, Kalafut SR, Moore GE, McDougall R. Comparison of carbon dioxide laser versus bipolar vessel device for staphylectomy for the treatment of brachycephalic obstructive airway syndrome. THE CANADIAN VETERINARY JOURNAL = LA REVUE VETERINAIRE CANADIENNE 2019; 60:160-166. [PMID: 30705451 PMCID: PMC6340259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Carbon dioxide (CO2) laser and bipolar vessel sealing device (BSD) are industry standards for soft palate resection. No studies exist to directly compare these 2 techniques in a clinical setting. The purpose of this study was to describe and compare clinical outcomes for dogs that underwent CO2 laser versus BSD staphylectomy. Medical records of brachycephalic dogs that underwent CO2 laser (Group-L) or BSD staphylectomies (Group-B) between September 2013 and September 2017 were reviewed retrospectively. Of 60 dogs that met the inclusion criteria, 26 dogs (43%) were designated Group-L and 34 (57%) Group-B. Techniques did not differ in procedure or anesthetic time (P = 0.52 and P = 0.19, respectively) or major complication rates [intraoperative (P = 1.00), post-operative (P = 0.72), short-term (P = 1.00), and long-term (P = 0.68)]. This study suggests that patient outcomes are similar for dogs undergoing staphylectomy performed by CO2 laser and BSD.
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Affiliation(s)
- Meghan S Kirsch
- Animal Medical Center, New York, New York, USA (Kirsch, Spector, Kalafut, McDougall); Purdue University College of Veterinary Medicine, West Lafayette, Indiana, USA (Moore)
| | - Daniel Spector
- Animal Medical Center, New York, New York, USA (Kirsch, Spector, Kalafut, McDougall); Purdue University College of Veterinary Medicine, West Lafayette, Indiana, USA (Moore)
| | - Sarah R Kalafut
- Animal Medical Center, New York, New York, USA (Kirsch, Spector, Kalafut, McDougall); Purdue University College of Veterinary Medicine, West Lafayette, Indiana, USA (Moore)
| | - George E Moore
- Animal Medical Center, New York, New York, USA (Kirsch, Spector, Kalafut, McDougall); Purdue University College of Veterinary Medicine, West Lafayette, Indiana, USA (Moore)
| | - Renee McDougall
- Animal Medical Center, New York, New York, USA (Kirsch, Spector, Kalafut, McDougall); Purdue University College of Veterinary Medicine, West Lafayette, Indiana, USA (Moore)
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Riggs J, Liu N, Sutton DR, Sargan D, Ladlow JF. Validation of exercise testing and laryngeal auscultation for grading brachycephalic obstructive airway syndrome in pugs, French bulldogs, and English bulldogs by using whole‐body barometric plethysmography. Vet Surg 2019; 48:488-496. [DOI: 10.1111/vsu.13159] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/28/2018] [Accepted: 12/16/2018] [Indexed: 11/28/2022]
Affiliation(s)
- Julia Riggs
- The Queen's Veterinary School HospitalUniversity of Cambridge Cambridge United Kingdom
| | - Nai‐Chieh Liu
- The Queen's Veterinary School HospitalUniversity of Cambridge Cambridge United Kingdom
| | - Dawn R. Sutton
- The Queen's Veterinary School HospitalUniversity of Cambridge Cambridge United Kingdom
| | - David Sargan
- The Queen's Veterinary School HospitalUniversity of Cambridge Cambridge United Kingdom
| | - Jane F. Ladlow
- The Queen's Veterinary School HospitalUniversity of Cambridge Cambridge United Kingdom
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Hinchliffe TA, Liu NC, Ladlow J. Sleep-disordered breathing in the Cavalier King Charles spaniel: A case series. Vet Surg 2018; 48:497-504. [PMID: 30592314 DOI: 10.1111/vsu.13148] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 10/29/2018] [Accepted: 11/29/2018] [Indexed: 11/28/2022]
Abstract
OBJECTIVE To describe sleep-disordered breathing (SDB) in the Cavalier King Charles spaniel (CKCS). STUDY DESIGN Retrospective case series. ANIMALS Five client-owned dogs referred for SDB. METHODS Medical records were reviewed including recheck appointments and routine preoperative and postoperative questionnaires. Whole-body barometric plethysmography was used to categorize SDB. RESULTS All dogs presented with multiple episodes of stertorous breathing, choking, and apnea during sleep. Severe nasal septal deviation, aberrant nasal turbinates, and soft palate elongation and thickening were noted on computed tomography and rhinoscopy of each dog. Whole-body barometric plethysmography measurements during sleep (in 3 dogs) documented periods of choking, snoring, and apnea. Treatment combined laser turbinectomy, folding flap palatoplasty, tonsillectomy, laryngeal sacculectomy, and cuneiform process resection. All dogs improved in terms of incidence and severity of sleep apnea within 1 week, with 4 of 5 dogs achieving complete resolution. CONCLUSION The objective measurements used to characterize SDB in this population of CKCS provided some evidence to support an obstructive cause for this condition, which improved with surgical treatment. CLINICAL SIGNIFICANCE Sleep-disordered breathing in the CKCS is a different clinical presentation of brachycephalic obstructive airway syndrome. Our finding of intranasal abnormalities in these 5 dogs with SDB provides justification for future research into its clinical significance.
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Affiliation(s)
- Tom A Hinchliffe
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Nai-Chieh Liu
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Jane Ladlow
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
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Liu NC, Genain MA, Kalmar L, Sargan DR, Ladlow JF. Objective effectiveness of and indications for laser-assisted turbinectomy in brachycephalic obstructive airway syndrome. Vet Surg 2018; 48:79-87. [DOI: 10.1111/vsu.13107] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 04/17/2018] [Accepted: 07/06/2018] [Indexed: 11/27/2022]
Affiliation(s)
- Nai-Chieh Liu
- Department of Veterinary Medicine; University of Cambridge; Cambridge UK
| | - Marie-Aude Genain
- Department of Veterinary Medicine; University of Cambridge; Cambridge UK
- Queen's Veterinary School Hospital; University of Cambridge; Cambridge UK
| | - Lajos Kalmar
- Department of Veterinary Medicine; University of Cambridge; Cambridge UK
| | - David R. Sargan
- Department of Veterinary Medicine; University of Cambridge; Cambridge UK
| | - Jane F. Ladlow
- Department of Veterinary Medicine; University of Cambridge; Cambridge UK
- Queen's Veterinary School Hospital; University of Cambridge; Cambridge UK
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45
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O'Neill DG, Baral L, Church DB, Brodbelt DC, Packer RMA. Demography and disorders of the French Bulldog population under primary veterinary care in the UK in 2013. Canine Genet Epidemiol 2018; 5:3. [PMID: 29750111 PMCID: PMC5932866 DOI: 10.1186/s40575-018-0057-9] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 03/19/2018] [Indexed: 01/15/2023] Open
Abstract
Background Despite its Gallic name, the French Bulldog is a breed of both British and French origin that was first recognised by The Kennel Club in 1906. The French Bulldog has demonstrated recent rapid rises in Kennel Club registrations and is now (2017) the second most commonly registered pedigree breed in the UK. However, the breed has been reported to be predisposed to several disorders including ocular, respiratory, neurological and dermatological problems. The VetCompass™ Programme collates de-identified clinical data from primary-care veterinary practices in the UK for epidemiological research. Using VetCompass™ clinical data, this study aimed to characterise the demography and common disorders of the general population of French Bulldogs under veterinary care in the UK. Results French Bulldogs comprised 2228 (0.49%) of 445,557 study dogs under veterinary care during 2013. Annual proportional birth rates showed that the proportional ownership of French Bulldog puppies rose steeply from 0.02% of the annual birth cohort attending VetCompass™ practices in 2003 to 1.46% in 2013. The median age of the French Bulldogs overall was 1.3 years (IQR 0.6–2.5, range 0.0–13.0). The most common colours of French Bulldogs were brindle (solid or main) (32.36%) and fawn (solid or main) (29.9%). Of the 2228 French Bulldogs under veterinary care during 2013, 1612 (72.4%) had at least one disorder recorded. The most prevalent fine-level precision disorders recorded were otitis externa (14.0%, 95% CI: 12.6–15.5), diarrhoea (7.5%, 95% CI: 6.4–8.7), conjunctivitis (3.2%, 95% CI: 2.5–4.0), nails overlong (3.1%, 95% CI% 2.4–3.9) and skin fold dermatitis (3.0%, 95% CI% 2.3–3.8). The most prevalent disorder groups were cutaneous (17.9%, 95% CI: 16.3–19.6), enteropathy (16.7%, 95% CI: 15.2–18.3), aural (16.3%, 95% CI: 14.8–17.9), upper respiratory tract (12.7%, 95% CI: 11.3–14.1) and ophthalmological (10.5%, 95% CI: 9.3–11.9). Conclusions Ownership of French Bulldogs in the UK is rising steeply. This means that the disorder profiles reported in this study reflect a current young UK population and are likely to shift as this cohort ages. Otitis externa, diarrhoea and conjunctivitis were the most common disorders in French Bulldogs. Identification of health priorities based on VetCompass™ data can support evidence–based reforms to improve health and welfare within the breed.
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Affiliation(s)
- Dan G O'Neill
- 1Pathobiology and Population Science, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA UK
| | - Lauren Baral
- 2The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA UK
| | - David B Church
- 3Clinical Sciences and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA UK
| | - Dave C Brodbelt
- 1Pathobiology and Population Science, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA UK
| | - Rowena M A Packer
- 3Clinical Sciences and Services, The Royal Veterinary College, Hawkshead Lane, North Mymms, Hatfield, Herts AL9 7TA UK
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46
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Ladlow J, Liu NC, Kalmar L, Sargan D. Brachycephalic obstructive airway syndrome. Vet Rec 2018; 182:375-378. [DOI: 10.1136/vr.k1403] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Jane Ladlow
- The Cambridge BOAS Research Group, Department of Veterinary Medicine; University of Cambridge; Madingley Road Cambridge CB3 0ES UK
| | - Nai-Chieh Liu
- The Cambridge BOAS Research Group, Department of Veterinary Medicine; University of Cambridge; Madingley Road Cambridge CB3 0ES UK
| | - Lajos Kalmar
- The Cambridge BOAS Research Group, Department of Veterinary Medicine; University of Cambridge; Madingley Road Cambridge CB3 0ES UK
| | - David Sargan
- The Cambridge BOAS Research Group, Department of Veterinary Medicine; University of Cambridge; Madingley Road Cambridge CB3 0ES UK
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47
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Barker DA, Rubiños C, Taeymans O, Demetriou JL. Magnetic resonance imaging evaluation of olfactory bulb angle and soft palate dimensions in brachycephalic and nonbrachycephalic dogs. Am J Vet Res 2018; 79:170-176. [DOI: 10.2460/ajvr.79.2.170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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48
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Liu NC, Troconis EL, McMillan M, Genain MA, Kalmar L, Price DJ, Sargan DR, Ladlow JF. Endotracheal tube placement during computed tomography of brachycephalic dogs alters upper airway dimensional measurements. Vet Radiol Ultrasound 2018; 59:289-304. [PMID: 29336085 DOI: 10.1111/vru.12590] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2017] [Revised: 10/10/2017] [Accepted: 10/15/2017] [Indexed: 10/18/2022] Open
Abstract
Computed tomography (CT) is used to document upper airway lesions in dogs with brachycephalic obstructive airway syndrome. The presence of an endotracheal tube during CT scanning is often required for general anesthesia. We hypothesized that the endotracheal tube placement would change the soft tissue dimensions of the upper airway. The aims of this prospective, method comparison study were to evaluate the reliability of the previously reported upper airway CT measurements with endotracheal tube placement, and to propose measurements that are minimally affected by the endotracheal tube. Twenty brachycephalic dogs were included in this study. Each dog underwent head/neck CT with an endotracheal tube, followed by a second scan without the endotracheal tube. Ten measurements of the soft palate, nasopharynx, and trachea were performed. Tracheal dimension was significantly larger with the endotracheal tube compared to without, whereas the soft palate cross-sectional area was significantly smaller with the endotracheal tube than without the endotracheal tube. The influence of the endotracheal tube on the caudal nasopharynx cross-sectional (transverse-sectional) area varied with a mean proportional absolute difference of 35%. Rostral soft palate thickness, tracheal perimeter, and cross-sectional area of the rostral nasopharynx were the measurements least affected by the endotracheal tube (intraclass correlation coefficient = 0.964, 0.967, and 0.951, respectively). Therefore, we proposed that these three measurements may be most useful for future brachycephalic obstructive airway syndrome studies that require CT scanning of intubated animals. However, with endotracheal tube placement, measurements of soft palate length, caudal nasopharyngeal cross-sectional area, and trachea height and width may not be reliable.
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Affiliation(s)
- Nai-Chieh Liu
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | | | - Matthew McMillan
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK.,Queen's Veterinary School Hospital, University of Cambridge, Cambridge, UK
| | - Marie-Aude Genain
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK.,Queen's Veterinary School Hospital, University of Cambridge, Cambridge, UK
| | - Lajos Kalmar
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - David J Price
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - David R Sargan
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK
| | - Jane F Ladlow
- Department of Veterinary Medicine, University of Cambridge, Cambridge, UK.,Queen's Veterinary School Hospital, University of Cambridge, Cambridge, UK
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49
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Hostnik ET, Scansen BA, Zielinski R, Ghadiali SN. Quantification of nasal airflow resistance in English bulldogs using computed tomography and computational fluid dynamics. Vet Radiol Ultrasound 2017; 58:542-551. [PMID: 28718208 PMCID: PMC5597484 DOI: 10.1111/vru.12531] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 04/17/2017] [Accepted: 05/04/2017] [Indexed: 11/28/2022] Open
Abstract
Stenotic nares, edematous intranasal turbinates, mucosal swelling, and an elongated, thickened soft palate are common sources of airflow resistance for dogs with brachycephalic airway syndrome. Surgery has focused on enlarging the nasal apertures and reducing tissue of the soft palate. However, objective measures of surgical efficacy are lacking. Twenty-one English bulldogs without previous surgery were recruited for this prospective, pilot study. Computed tomography was performed using conscious sedation and without endotracheal intubation using a 128 multidetector computed tomography scanner. Raw multidetector computed tomography data were rendered to create a three-dimensional surface mesh model by automatic segmentation of the air-filled nasal passage from the nares to the caudal soft palate. Three-dimensional surface models were used to construct computational fluid dynamics models of nasal airflow resistance from the nares to the caudal aspect of the soft palate. The computational fluid dynamics models were used to simulate airflow in each dog and airway resistance varied widely with a median 36.46 (Pa/mm)/(l/s) and an interquartile range of 19.84 to 90.74 (Pa/mm)/(/s). In 19/21 dogs, the rostral third of the nasal passage exhibited a larger airflow resistance than the caudal and middle regions of the nasal passage. In addition, computational fluid dynamics data indicated that overall measures of airflow resistance may significantly underestimate the maximum local resistance. We conclude that computational fluid dynamics models derived from nasal multidetector computed tomography can quantify airway resistance in brachycephalic dogs. This methodology represents a novel approach to noninvasively quantify airflow resistance and may have utility for objectively studying effects of surgical interventions in canine brachycephalic airway syndrome.
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Affiliation(s)
- Eric T Hostnik
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, 43210
| | - Brian A Scansen
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, 43210
| | - Rachel Zielinski
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, 43210
| | - Samir N Ghadiali
- Department of Biomedical Engineering, The Ohio State University, Columbus, OH, 43210
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50
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Liu NC, Troconis EL, Kalmar L, Price DJ, Wright HE, Adams VJ, Sargan DR, Ladlow JF. Conformational risk factors of brachycephalic obstructive airway syndrome (BOAS) in pugs, French bulldogs, and bulldogs. PLoS One 2017; 12:e0181928. [PMID: 28763490 PMCID: PMC5538678 DOI: 10.1371/journal.pone.0181928] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2017] [Accepted: 07/10/2017] [Indexed: 12/31/2022] Open
Abstract
Extremely brachycephalic, or short-muzzled, dog breeds such as pugs, French bulldogs, and bulldogs are prone to the conformation-related respiratory disorder—brachycephalic obstructive airway syndrome (BOAS). Affected dogs present with a wide range of clinical signs from snoring and exercise intolerance, to life-threatening events such as syncope. In this study, conformational risk factors for BOAS that could potentially aid in breeding away from BOAS were sought. Six hundred and four pugs, French bulldogs, and bulldogs were included in the study. Soft tape measurements of the head and body were used and the inter-observer reproducibility was evaluated. Breed-specific models were developed to assess the associations between the conformational factors and BOAS status based on functional grading. The models were further validated by means of a BOAS index, which is an objective measurement of respiratory function using whole-body barometric plethysmography. The final models have good predictive power for discriminating BOAS (-) and BOAS (+) phenotypes indicated by the area under the curve values of >80% on the receiver operating curves. When other factors were controlled, stenotic nostrils were associated with BOAS in all three breeds; pugs and bulldogs with higher body condition scores (BCS) had a higher risk of developing BOAS. Among the standardized conformational measurements (i.e. craniofacial ratio (CFR), eye width ratio (EWR), skull index (SI), neck girth ratio (NGR), and neck length ratio (NLR)), for pugs EWR and SI, for French bulldogs NGR and NLR, and for bulldogs SI and NGR showed significant associations with BOAS status. However, the NGR in bulldogs was the only significant predictor that also had satisfactory inter-observer reproducibility. A NGR higher than 0.71 in male bulldogs was predictive of BOAS with approximately 70% sensitivity and specificity. In conclusion, stenotic nostrils, BCS, and NGR were found to be valid, easily applicable predictors for BOAS (+).
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Affiliation(s)
- Nai-Chieh Liu
- Department of Veterinary Medicine, University of Cambridge, Cambridge, Cambridgeshire, United Kingdom
| | - Eileen L. Troconis
- Department of Veterinary Medicine, University of Cambridge, Cambridge, Cambridgeshire, United Kingdom
| | - Lajos Kalmar
- Department of Veterinary Medicine, University of Cambridge, Cambridge, Cambridgeshire, United Kingdom
| | - David J. Price
- Department of Veterinary Medicine, University of Cambridge, Cambridge, Cambridgeshire, United Kingdom
| | - Hattie E. Wright
- Department of Veterinary Medicine, University of Cambridge, Cambridge, Cambridgeshire, United Kingdom
| | | | - David R. Sargan
- Department of Veterinary Medicine, University of Cambridge, Cambridge, Cambridgeshire, United Kingdom
| | - Jane F. Ladlow
- Department of Veterinary Medicine, University of Cambridge, Cambridge, Cambridgeshire, United Kingdom
- * E-mail:
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