1
|
Segev G, Cortellini S, Foster JD, Francey T, Langston C, Londoño L, Schweighauser A, Jepson RE. International Renal Interest Society best practice consensus guidelines for the diagnosis and management of acute kidney injury in cats and dogs. Vet J 2024; 305:106068. [PMID: 38325516 DOI: 10.1016/j.tvjl.2024.106068] [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: 06/11/2023] [Revised: 12/10/2023] [Accepted: 01/19/2024] [Indexed: 02/09/2024]
Abstract
Acute kidney injury (AKI) is defined as an injury to the renal parenchyma, with or without a decrease in kidney function, as reflected by accumulation of uremic toxins or altered urine production (i.e., increased or decreased). AKI might result from any of several factors, including ischemia, inflammation, nephrotoxins, and infectious diseases. AKI can be community- or hospital-acquired. The latter was not previously considered a common cause for AKI in animals; however, recent evidence suggests that the prevalence of hospital-acquired AKI is increasing in veterinary medicine. This is likely due to a combination of increased recognition and awareness of AKI, as well as increased treatment intensity (e.g., ventilation and prolonged hospitalization) in some veterinary patients and increased management of geriatric veterinary patients with multiple comorbidities. Advancements in the management of AKI, including the increased availability of renal replacement therapies, have been made; however, the overall mortality of animals with AKI remains high. Despite the high prevalence of AKI and the high mortality rate, the body of evidence regarding the diagnosis and the management of AKI in veterinary medicine is very limited. Consequently, the International Renal Interest Society (IRIS) constructed a working group to provide guidelines for animals with AKI. Recommendations are based on the available literature and the clinical experience of the members of the working group and reflect consensus of opinion. Fifty statements were generated and were voted on in all aspects of AKI and explanatory text can be found either before or after each statement.
Collapse
Affiliation(s)
- Gilad Segev
- Koret School of Veterinary Medicine, The Robert H. Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, Israel.
| | - Stefano Cortellini
- Department of Clinical Science and Services, Royal Veterinary College, Hawkshead Lane, North Mymms, Hertfordshire, UK
| | - Jonathan D Foster
- Department of Nephrology and Urology, Friendship Hospital for Animals, Washington DC, USA
| | - Thierry Francey
- Department of Clinical Veterinary Medicine, Vetsuisse Faculty University of Bern, Bern, Switzerland
| | - Catherine Langston
- Veterinary Clinical Science, The Ohio State University, Columbus, OH, USA
| | - Leonel Londoño
- Department of Critical Care, Capital Veterinary Specialists, Jacksonville, FL, USA
| | - Ariane Schweighauser
- Department of Clinical Veterinary Medicine, Vetsuisse Faculty University of Bern, Bern, Switzerland
| | - Rosanne E Jepson
- Department of Clinical Science and Services, Royal Veterinary College, Hawkshead Lane, North Mymms, Hertfordshire, UK
| |
Collapse
|
2
|
Fischer H, Geisen V, Dorsch R, Hartmann K, Dörfelt R. Hemostatic and thromboelastographic parameters in dogs with renal azotemia. Vet World 2023; 16:1214-1221. [PMID: 37577193 PMCID: PMC10421550 DOI: 10.14202/vetworld.2023.1214-1221] [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: 02/13/2023] [Accepted: 05/02/2023] [Indexed: 08/15/2023] Open
Abstract
Background and Aim Humans and dogs with azotemia can develop coagulation disorders. Therefore, this study aimed to evaluate the coagulation profiles and thromboelastographic parameters in dogs with acute kidney injury (AKI) and chronic kidney disease (CKD). Materials and Methods In this prospective study, 31 client-owned dogs with renal azotemia (creatinine >220 μmol/L) were enrolled. Clinical signs of hemostatic disorders, complete blood count, coagulation profile, D-dimers, thromboelastography, and 28-day survival data were obtained and analyzed using the t-test, Mann-Whitney U test, and Chi-square test. Statistical significance was set at p < 0.05. Results Seventeen dogs with AKI, 10 with CKD, and four with acute-on-chronic kidney injury (AoC) were enrolled. Ten dogs (AKI, 8/17; CKD, 2/10) had thrombocytopenia. Prothrombin time was prolonged in four dogs with AKI and longer in dogs with AKI than in dogs with CKD (p = 0.004). The activated partial thromboplastin time was prolonged in 23 dogs (AKI, 14/17; CKD, 7/10; AoC, 3/4) and was longer in azotemic dogs than in healthy control dogs (p = 0.003). Thromboelastographic tracings were hypocoagulable in three dogs with AKI and hypercoagulable in 16 dogs (AKI 4/17, CKD 9/10, AoC 3/4). The thromboelastographic values for maximum amplitude (p < 0.001) and global clot strength (p < 0.001) were lower in dogs with AKI than in those with CKD. Conclusion Hypercoagulable thromboelastographic tracings were observed in dogs with CKD, whereas coagulation times were prolonged in dogs with AKI. However these findings should be validated by further studies.
Collapse
Affiliation(s)
- Hendryk Fischer
- LMU Small Animal Clinic, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany
| | - Vera Geisen
- LMU Small Animal Clinic, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany
| | - Roswitha Dorsch
- LMU Small Animal Clinic, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany
| | - Katrin Hartmann
- LMU Small Animal Clinic, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany
| | - René Dörfelt
- LMU Small Animal Clinic, LMU Munich, Veterinaerstrasse 13, 80539 Munich, Germany
| |
Collapse
|
3
|
Wheeler LR, Edwards TH, Heinz JA, Scott LLF, Grantham LE, Keesee JD, Henderson AF, Gerardo AC, Hoareau G, Bynum JA. Comparison of assessment of coagulation in healthy dogs by the TEG 6s and TEG 5000 viscoelastic analyzers. J Vet Diagn Invest 2022; 34:780-788. [PMID: 35854673 PMCID: PMC9446302 DOI: 10.1177/10406387221112638] [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] [Indexed: 11/16/2022] Open
Abstract
The TEG 6s (Haemonetics) point-of-care viscoelastic analyzer is portable, compact, simple to use, and has the potential for rapid viscoelastic analysis that can guide the treatment of veterinary patients at the site of care. Although approved for use in people, the TEG 6s has yet to be evaluated for hemostatic analysis in veterinary medicine. Citrated whole blood (CWB) was collected from 27 healthy dogs. An aliquot of CWB from each dog was diluted by 33% with an isotonic crystalloid, representing an in vitro model of hemodilution. Unaltered and diluted CWB samples were analyzed using 2 TEG 6s and 6 TEG 5000 (Haemonetics) analyzers. The 6 TEG 5000 analyzers ran duplicate analyses of either unaltered or diluted samples using 1 of 3 reagents (Haemonetics): Kaolin TEG, RapidTEG, or TEG Functional Fibrinogen. Duplicate TEG 5000 analyses were averaged and compared with a single TEG 6s analysis. Lin concordance correlation coefficient and Bland-Altman plots were used to evaluate agreement of reaction time, kinetic time, alpha angle, maximum amplitude (MA), and G value (G) for samples activated with Kaolin TEG, and agreement of MA for samples activated with RapidTEG between the 2 machines. Overall, agreement between the TEG 6s and TEG 5000 analyzers was poor. Viscoelastic measurements by the TEG 6s and TEG 5000 in healthy dogs were not all interchangeable. Agreement was satisfactory only for MA and G measurements of diluted blood samples activated with Kaolin TEG, and MA measurements for both unaltered and diluted blood samples activated with RapidTEG.
Collapse
Affiliation(s)
- Lance R. Wheeler
- College of Veterinary Medicine, Texas A&M
University, College Station, TX, USA
| | - Thomas H. Edwards
- U.S. Army Institute of Surgical Research, JBSA
Fort Sam Houston, TX, USA
- BluePearl Veterinary Specialists and the
College of Veterinary Medicine, Lincoln Memorial University, Harrogate, TN,
USA
| | - Justin A. Heinz
- College of Veterinary Medicine, Texas A&M
University, College Station, TX, USA
| | - Laura L. F. Scott
- U.S. Army Institute of Surgical Research, JBSA
Fort Sam Houston, TX, USA
| | - Lonnie E. Grantham
- U.S. Army Institute of Surgical Research, JBSA
Fort Sam Houston, TX, USA
- Oak Ridge Institute for Science and Education,
Oak Ridge, TN, USA
| | - Jeffrey D. Keesee
- U.S. Army Institute of Surgical Research, JBSA
Fort Sam Houston, TX, USA
| | - Alice F. Henderson
- U.S. Army Institute of Surgical Research, JBSA
Fort Sam Houston, TX, USA
| | - Angelina C. Gerardo
- Department of Defense Military Working Dog
Veterinary Service, JBSA Lackland Air Force Base, TX, USA
| | - Guillaume Hoareau
- Department of Surgery, University of Utah
Health, Salt Lake City, UT, USA
| | - James A. Bynum
- U.S. Army Institute of Surgical Research, JBSA
Fort Sam Houston, TX, USA
| |
Collapse
|
4
|
Benson KK, Quimby JM, Shropshire SB, Summers SC, Dowers KL. Evaluation of platelet function in cats with and without kidney disease: a pilot study. J Feline Med Surg 2021; 23:715-721. [PMID: 33196335 PMCID: PMC10812198 DOI: 10.1177/1098612x20972069] [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] [Indexed: 11/15/2022]
Abstract
OBJECTIVES The aims of this study were to determine if stable chronic kidney disease (CKD) cats and uremic crisis cats have altered platelet function, and to determine the prevalence of positive fecal occult blood in CKD cats. METHODS Platelet function in normal cats, clinically stable International Renal Interest Society (IRIS) stage 2-4 CKD cats and CKD cats experiencing a uremic crisis were evaluated using impedance aggregometry. Area under the curve (AUC) at 6 mins was calculated for saline, adenosine diphosphate (AUCADP) and arachidonic acid (AUCASPI). The AUC in addition to hematocrit, platelet count and mean platelet volume (MPV) were compared between groups using the Kruskal-Wallis test followed by Dunn's post-hoc analysis. Guaiac fecal occult blood tests were performed on fecal samples and results were compared between groups using a χ2 for trend test. RESULTS AUCADP (P = 0.04) and AUCASPI (P = 0.05) were significantly higher in uremic crisis cats compared with normal cats at 6 mins. Hematocrit was significantly higher in normal cats when compared with IRIS stage 3 and 4 (P = 0.002) and uremic crisis (P = 0.0008) cats, with no difference among groups for platelet count or MPV. The proportion of cats with positive fecal occult blood samples was significantly different between groups (P = 0.0017); 50% uremic crisis cats, 33% IRIS stage 3 and 4 cats, and 10% IRIS stage 2 cats were positive, while no normal cats were positive. The proportion of cats with platelet clumping was significantly different between groups (P = 0.03). CONCLUSIONS AND RELEVANCE Platelet hyper-reactivity may be occurring in CKD cats experiencing a uremic crisis. The etiology of positive fecal occult blood samples in CKD cats is unclear and did not appear to be related to decreased platelet function as measured in this study and requires further investigation.
Collapse
Affiliation(s)
- Kellyi K Benson
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
| | - Jessica M Quimby
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
- Department of Veterinary Clinical Sciences, The Ohio State University, Columbus, OH, USA
| | - Sarah B Shropshire
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
| | - Stacie C Summers
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
- Oregon State University, Corvallis, OR, USA
| | - Kristy L Dowers
- Department of Clinical Sciences, Colorado State University, Fort Collins, CO, USA
| |
Collapse
|
5
|
Pazzi P, Celliers A, du Plessis EC, Kristensen AT, Goddard A. The prevalence of intra-tumoral and distant thrombi, as well as tumour-cell emboli in canine neoplasia. Vet Comp Oncol 2021; 20:154-163. [PMID: 34314552 DOI: 10.1111/vco.12757] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 07/24/2021] [Indexed: 11/29/2022]
Abstract
Macroscopic thromboembolic disease has been associated with canine neoplasia, whereas prevalence studies of concurrent microthrombi and tumour-cell emboli are lacking. This retrospective study investigated microthrombi and tumour cell emboli by reviewing pathology records of dogs diagnosed with lymphoma, sarcoma, carcinoma and mast cell tumours with a concurrent description of thrombi or emboli. Pathology reports and medical records of cases with either tumour biopsies and/or post mortems with a diagnosis of neoplasia were reviewed for the presence of microthrombi, macrothrombi and/or tumour-cell emboli and the association with tumour type. Of the 28 895 canine cases in the database, 21 252 (73.5%) were antemortem biopsy specimens and 7643 were post mortems (26.5%); 2274 solid tumours were identified, 2107 (92.7%) were antemortem biopsy diagnoses and 167 (7.3%) were post mortem diagnoses. The prevalence of solid tumour types in the database (28 895 cases) was 872 (3.0%) lymphoma, 722 (2.5%) sarcoma, 455 (1.6%) carcinoma and 225 (0.8%) mast cell tumour. The prevalence of microthrombi associated with these tumours was 58/2274 (2.6%). Intra-tumoral microthrombi were reported in 53/2274 (2.3%) cases, the majority in sarcomas (37/53, 69.8%). No macrothrombi were reported. Tumour-cell emboli were identified in 39/2274 (1.7%) cases, 31/39 (79.5%) were extra-tumoral or distant emboli, and carcinoma the most commonly associated tumour (29/39; 74.4%). Microthrombi were reported in 2.6% of cases, the majority in sarcomas and tumour-cell emboli were identified in 1.7% of cases, the majority carcinomas. Prospective investigations are necessary to explore the potential clinical and prognostic implications of microthrombi and tumour-cell emboli in canine neoplasia.
Collapse
Affiliation(s)
- Paolo Pazzi
- Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | - Anri Celliers
- Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | | | - Annemarie T Kristensen
- Department of Veterinary Clinical Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Amelia Goddard
- Department of Companion Animal Clinical Studies, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| |
Collapse
|
6
|
Jain N, Corken AL, Kumar A, Davis CL, Ware J, Arthur JM. Role of Platelets in Chronic Kidney Disease. J Am Soc Nephrol 2021; 32:1551-1558. [PMID: 34140394 PMCID: PMC8425650 DOI: 10.1681/asn.2020121806] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 02/20/2021] [Accepted: 02/23/2021] [Indexed: 02/04/2023] Open
Abstract
Platelet-dependent mechanisms for excessive clotting and bleeding in CKD remain undefined. Moreover, platelets' contribution to inflammation, and specifically to CKD, are equally elusive. To date, descriptions of changes in the functional properties of circulating platelets during CKD have provided confusing interpretations. Experimental approaches that can advance our understanding of platelet dysfunction in CKD are needed, and studies that provide mechanistic insights into the dynamic relationships between thrombosis, bleeding, and inflammation associated with CKD will be essential to improve clinical management and outcomes for this vulnerable population. This article summarizes existing literature characterizing platelets in CKD and identifies areas that need further investigation.
Collapse
Affiliation(s)
- Nishank Jain
- Department of Internal Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas,Medicine Service, Central Arkansas Veterans Affairs Medical Center, Little Rock, Arkansas
| | - Adam L. Corken
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Amudha Kumar
- Department of Internal Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Clayton L. Davis
- Department of Internal Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - Jerry Ware
- Department of Physiology and Biophysics, University of Arkansas for Medical Sciences, Little Rock, Arkansas
| | - John M. Arthur
- Department of Internal Medicine, University of Arkansas for Medical Sciences, Little Rock, Arkansas,Medicine Service, Central Arkansas Veterans Affairs Medical Center, Little Rock, Arkansas
| |
Collapse
|
7
|
Ruehl M, Lynch AM, O'Toole TE, Morris B, Rush J, Couto CG, Hmelo S, Sonnenshein S, Butler A, Guillaumin J. Outcome and treatments of dogs with aortic thrombosis: 100 cases (1997-2014). J Vet Intern Med 2020; 34:1759-1767. [PMID: 33463770 PMCID: PMC7517508 DOI: 10.1111/jvim.15874] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 07/21/2020] [Accepted: 07/30/2020] [Indexed: 01/30/2023] Open
Abstract
Background Aortic thrombosis (ATh) is an uncommon condition in dogs, with limited understanding of risks factors, outcomes, and treatments. Objectives/Hypothesis To describe potential risk factors, outcome, and treatments in dogs with ATh. Animals Client‐owned dogs with a diagnosis of ATh based on ultrasonographic or gross necropsy examination. Method Multicentric retrospective study from 2 academic institutions. Results One hundred dogs were identified. Anti‐thrombin diagnosis, 35/100 dogs were nonambulatory. The dogs were classified as acute (n = 27), chronic (n = 72), or unknown (n = 1). Fifty‐four dogs had at least one comorbidity thought to predispose to ATh, and 23 others had multiple comorbidities. The remaining 23 dogs with no obvious comorbidities were classified as cryptogenic. Concurrent illnesses potentially related to the development of ATh included protein‐losing nephropathy (PLN) (n = 32), neoplasia (n = 22), exogenous corticosteroid administration (n = 16), endocrine disease (n = 13), and infection (n = 9). Dogs with PLN had lower antithrombin activity than those without PLN (64% and 82%, respectively) (P = .04). Sixty‐five dogs were hospitalized with 41 subsequently discharged. Sixteen were treated as outpatient and 19 euthanized at admission. In‐hospital treatments varied, but included thrombolytics (n = 12), alone or in combination with thrombectomy (n = 9). Fifty‐seven dogs survived to discharge. Sixteen were alive at 180 days. Using regression analysis, ambulation status at the time of presentation was significantly correlated with survival‐to‐discharge (P < .001). Conclusions/Clinical Importance Dogs with ATh have a poor prognosis, with nonambulatory dogs at the time of presentation having worse outcome. Although the presence of comorbid conditions associated with hypercoagulability is common, an underlying cause for ATh was not always identified.
Collapse
Affiliation(s)
| | - Alex M Lynch
- Department of Clinical Sciences, College of Veterinary Medicine, North Carolina State University, Raleigh, North Carolina, USA
| | - Therese E O'Toole
- Department of Clinical Sciences, Cummings School of Veterinary Medicine at Tufts University, North Grafton, Massachusetts, USA
| | - Bari Morris
- VCA Shoreline Veterinary Referral and Emergency Center, Shelton, Connecticut, USA
| | - John Rush
- Department of Clinical Sciences, Cummings School of Veterinary Medicine at Tufts University, North Grafton, Massachusetts, USA
| | | | | | | | - Amy Butler
- Critical Consults, LLC, Pittsburgh, Pennsylvania, USA
| | - Julien Guillaumin
- Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, Colorado, USA
| |
Collapse
|
8
|
Gant P, McBride D, Humm K. Abnormal platelet activity in dogs and cats - impact and measurement. J Small Anim Pract 2020; 61:3-18. [PMID: 31919851 DOI: 10.1111/jsap.13092] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 05/06/2019] [Accepted: 10/28/2019] [Indexed: 01/08/2023]
Abstract
Abnormal platelet activity can either lead to bleeding tendencies or inappropriate thrombus formation and can occur secondarily to a wide variety of disease processes, with a range of clinical consequences and severity. This article will discuss the pathophysiology of platelet function abnormalities and consider a logical diagnostic approach applicable to veterinary practice. Recent advances in platelet function testing will then be discussed, with regards to detection of platelet dysfunction and tailoring of pharmacological manipulation. Although many of these tests are still confined to research or academic institutions, techniques for indirectly assessing platelet function are starting to become more widely available. Although we still require further research to develop guidelines for the use of these tests in clinical decision-making, the recent advances in this field are an exciting step forward in being able to detect and manage platelet dysfunction in both primary care and referral practice.
Collapse
Affiliation(s)
- P Gant
- Queen Mother Hospital for Animals (QMHA), The Royal Veterinary College, Hatfield, Hertfordshire, AL9 7TA, UK
| | - D McBride
- Queen Mother Hospital for Animals (QMHA), The Royal Veterinary College, Hatfield, Hertfordshire, AL9 7TA, UK
| | - K Humm
- Queen Mother Hospital for Animals (QMHA), The Royal Veterinary College, Hatfield, Hertfordshire, AL9 7TA, UK
| |
Collapse
|
9
|
Shropshire S, Johnson T, Olver C. Platelet aggregometry testing during aspirin or clopidogrel treatment and measurement of clopidogrel metabolite concentrations in dogs with protein-losing nephropathy. J Vet Intern Med 2020; 34:710-718. [PMID: 31981378 PMCID: PMC7096639 DOI: 10.1111/jvim.15694] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Accepted: 12/19/2019] [Indexed: 12/22/2022] Open
Abstract
Background Dogs with protein‐losing nephropathy (PLN) are treated with antiplatelet drugs for thromboprophylaxis but no standardized method exists to measure drug response. It is also unknown if clopidogrel metabolite concentrations [CM] differ between healthy and PLN dogs. Objectives Assess response to aspirin or clopidogrel in PLN dogs using platelet aggregometry (PA) and compare [CM] between healthy and PLN dogs. Animals Six healthy and 14 PLN dogs. Methods Platelet aggregometry using adenosine diphosphate (ADP), arachidonic acid (AA), and saline was performed in healthy dogs at baseline and 1‐week postclopidogrel administration to identify responders or nonresponders. A decrease of ≥60% for ADP or ≥30% for AA at 1 or 3 hours postpill was used to define a responder. At 1 and 3 hours postclopidogrel, [CM] and PA were measured in healthy and PLN dogs. Platelet aggregometry was performed in PLN dogs at baseline, 1, 6, and 12 weeks after clopidogrel or aspirin administration. Results In PLN dogs receiving clopidogrel, PA differed from baseline at all time points for ADP but not for AA at any time point. Most dogs responded at 1 or both time points except for 1 dog that showed no response. For PLN dogs receiving aspirin, no differences from baseline were observed at any time point for either ADP or AA. No differences in [CM] were found at either time point between healthy and PLN dogs. Conclusions and Clinical Importance Platelet aggregometry may represent an objective method to evaluate response to clopidogrel or aspirin treatment and PLN dogs appear to metabolize clopidogrel similarly to healthy dogs.
Collapse
Affiliation(s)
- Sarah Shropshire
- Department of Clinical Sciences, Colorado State University, Fort Collins, Colorado
| | - Tyler Johnson
- North Carolina State University, Raleigh, North Carolina
| | - Christine Olver
- Department of Clinical Sciences, Colorado State University, Fort Collins, Colorado
| |
Collapse
|
10
|
Öberg J, Lilliehöök I, Höglund K, Ljungvall I. Hemostatic function in Cavalier King Charles Spaniels assessed using thromboelastography. Vet Clin Pathol 2019; 48:636-644. [PMID: 31650577 DOI: 10.1111/vcp.12795] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Revised: 03/22/2019] [Accepted: 03/26/2019] [Indexed: 11/29/2022]
Abstract
BACKGROUND Macrothrombocytopenia is a well-known anomaly in Cavalier King Charles Spaniels (CKCSs), a breed also highly predisposed to develop myxomatous mitral valve disease (MMVD). Thromboelastography (TEG) has been shown to be a valuable instrument for whole blood hemostatic evaluation in dogs and correlates well with different physiologic and pathologic situations. OBJECTIVES We aimed to assess the influence of macrothrombocytopenia and the severity of MMVD on hemostatic function as measured by TEG. METHODS Associations between TEG variables (R, K, α, MA, and G) and dog characteristics, heart rates, systolic blood pressures, MMVD severities (healthy, mild or moderate, and severe), echocardiographic variables, platelet variables (platelet count, mean platelet volume [MPV], and plateletcrit), and hematocrits were evaluated in 47 prospectively recruited privately owned CKCSs. Blood samples were analyzed using a computerized thromboelastograph and an Advia 2120 hematology analyzer. RESULTS Univariable and multiple regression analyses showed an effect of left ventricular (LV) fractional shortening (FS%) on all TEG variables, an effect of LV FS% and age on TEG α, and an effect of LV FS% and MPV on TEG MA and TEG G. TEG MA and G increased with increasing MPV, but the associations were generally weak. No significant differences were detected in the TEG variables between the MMVD severity groups. CONCLUSION Macrothrombocytopenia and increased LV FS%, of which the latter commonly increases in various positive inotropic states, were both associated with a more hypercoagulable hemostatic system, according to the TEG results, in the present study.
Collapse
Affiliation(s)
- Josefine Öberg
- AniCura Bagarmossen Small Animal Hospital, Stockholm, Sweden
| | - Inger Lilliehöök
- Department of Clinical Science, Faculty of Veterinary Medicine and Animal Science, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Katja Höglund
- Department of Anatomy, Physiology and Biochemistry, Faculty of Veterinary Medicine and Animal Science, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - Ingrid Ljungvall
- Department of Clinical Science, Faculty of Veterinary Medicine and Animal Science, Swedish University of Agricultural Sciences, Uppsala, Sweden
| |
Collapse
|
11
|
McBride D, Jepson RE, Cortellini S, Chan DL. Primary hemostatic function in dogs with acute kidney injury. J Vet Intern Med 2019; 33:2029-2036. [PMID: 31381195 PMCID: PMC6766483 DOI: 10.1111/jvim.15588] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2018] [Accepted: 07/23/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Bleeding tendencies can occur with uremia. OBJECTIVES To characterize primary hemostatic function in dogs with acute kidney injury (AKI). ANIMALS Ten dogs with International Renal Interest Society AKI grade III or above and 10 healthy controls. METHODS Prospective study comparing PCV, platelet count, platelet aggregometry (Multiplate), and von Willebrand factor antigen to collagen binding activity ratio (vWF:Ag:vWF:CBA) in 2 groups of dogs (AKI group versus controls). Buccal mucosal bleeding time was measured in the AKI group only. Data are presented as median [25th, 75th percentile] unless otherwise stated. Significance was set at P < .05. RESULTS Mean PCV was significantly lower in the AKI (34.7%; ±SD, 8.8) than in the control (46.1%; ±SD, 3.6; P < .001) group. Platelet count was significantly higher in the AKI (350.5 × 103 /μL [301, 516]) than in the control (241 × 103 /μL [227, 251]; P = .01) group. Collagen-activated platelet aggregometry measured as area under the curve was significantly lower in the AKI (36.9 ± 17.7) than in the control (54.9 ± 11.2; P = .05) group. vWF:Ag:vWF:CBA was significantly higher in the AKI (2.2 [1.9, 2.6]) than in the control (1.1 [1.1, 1.2]; P = .01) group. There was a strong correlation between vWF:Ag:vWF:CBA and creatinine (r = 0.859; P < .001), but no other variables. CONCLUSIONS AND CLINICAL IMPORTANCE Dogs with AKI had decreased collagen-activated platelet aggregation and appear to have a type II von Willebrand disease-like phenotype as indicated by the high vWF:Ag:vWF:CBA.
Collapse
Affiliation(s)
- Duana McBride
- Department of Clinical Science and Services, The Royal Veterinary College, University of London, London, United Kingdom
| | - Rosanne E Jepson
- Department of Clinical Science and Services, The Royal Veterinary College, University of London, London, United Kingdom
| | - Stefano Cortellini
- Department of Clinical Science and Services, The Royal Veterinary College, University of London, London, United Kingdom
| | - Daniel L Chan
- Department of Clinical Science and Services, The Royal Veterinary College, University of London, London, United Kingdom
| |
Collapse
|
12
|
Donaghy D, Yoo S, Johnson T, Nielsen V, Olver C. Carbon Monoxide-Releasing Molecule Enhances Coagulation and Decreases Fibrinolysis in Normal Canine Plasma. Basic Clin Pharmacol Toxicol 2018; 123:257-262. [PMID: 29577635 DOI: 10.1111/bcpt.13015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 03/16/2018] [Indexed: 01/17/2023]
Abstract
The dog is an important companion animal and also purpose-bred for research studies. Coagulopathies in dogs are common, although the availability of blood products for therapy is inconsistent throughout the profession. A pro-coagulant therapeutic that is readily available and easily stored would be useful for the treatment of coagulopathies. Tricarbonyldichlororuthenium (II) dimer [Carbon monoxide-releasing molecule-2 (CORM-2)] acts as a prothrombotic agent in plasma by increasing the velocity of clot formation and clot strength, and by decreasing the clot's vulnerability to fibrinolysis. We sought to test CORM-2's effect on coagulation and fibrinolysis in vitro in canine plasma using thromboelastography. Measures of the rate of clot formation and clot strength in plasma without CORM-2 were highly correlated with fibrinogen concentration. We found that CORM-2 significantly enhanced the rate of clot formation and clot strength and significantly reduced the rate of fibrinolysis and the clot lysis time. The per cent change in rate of clot formation and clot strength was not significantly correlated with fibrinogen concentration, indicating that CORM-2's pro-coagulant effect is not dependent on fibrinogen concentration. This study corroborates studies in other species that show that CORM-2 is pro-coagulant in plasma, and lays the groundwork for developing CORM-2 as a therapeutic agent for canine coagulopathies. Future studies will evaluate the effect of CORM-2 on whole blood both in vitro and in vivo.
Collapse
Affiliation(s)
- Dillon Donaghy
- Department of Microbiology, Immunology and Pathology, Clinical Pathology Section, Colorado State University, Fort Collins, CO, USA
| | - Seung Yoo
- Seattle Veterinary Specialists, Kirkland, WA, USA
| | - Tyler Johnson
- Department of Microbiology, Immunology and Pathology, Clinical Pathology Section, Colorado State University, Fort Collins, CO, USA
| | - Vance Nielsen
- Department of Anesthesia, University of Arizona College of Medicine, Tucson, AZ, USA
| | - Christine Olver
- Department of Microbiology, Immunology and Pathology, Clinical Pathology Section, Colorado State University, Fort Collins, CO, USA
| |
Collapse
|