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Ambrocio KR, Ramsey R, O’Rourke A, Beall J, (Focht) Garand KL. Normal Variations in Upper Esophageal Sphincter Function During Deglutition: A Secondary Analysis of Videofluoroscopic Data. Laryngoscope 2024; 134:2306-2315. [PMID: 37962100 PMCID: PMC11006589 DOI: 10.1002/lary.31173] [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: 03/20/2023] [Revised: 08/01/2023] [Accepted: 10/25/2023] [Indexed: 11/15/2023]
Abstract
OBJECTIVE Cricopharyngeal dysfunction is a common potential cause of pharyngoesophageal dysphagia. Contextual factors (i.e., personal demographics and bolus properties) appear to impact upper esophageal sphincter (UES) function but have yet to be assessed collectively in a large-scale study using psychometrically sound swallow task procedures. Using a standardized and validated videofluoroscopic approach, we investigated the collective effects of age, sex, and swallow task on UES opening duration (UESOdur) and UES maximum distension (UESmax) in a large sample of healthy adults. METHODS UESOdur and UESmax data were analyzed from existing videofluoroscopic images of 195 healthy adults (21-89 years old) across seven swallow tasks (thin liquid to viscous liquids, puree, and a solid). Generalized estimating equation modeling captured the effects of the aforementioned contextual factors (α = 0.05). RESULTS UESOdur significantly increased with age, while UESmax had an inverse relationship. Females had significantly wider UESmax. UESOdur of 5 mL thin liquid was significantly shorter than all other liquid swallow tasks, while solid had an inverse effect. Compared to 5 mL thin liquid, all other swallow tasks resulted in significantly wider UESmax. Mildly and moderately thick liquid significantly increased UESOdur when isolating viscosity. UESmax was significantly wider with mildly and moderately thick liquid and puree than thin liquid. When isolating volume, cup sip thin liquid increased both measures significantly relative to 5 mL. CONCLUSION Age, sex, and swallow task can influence the normal timing and extent of UES movement. These collective effects contribute to normal variability in UES function and should be considered for clinical decision-making. LEVEL OF EVIDENCE 4 Laryngoscope, 134:2306-2315, 2024.
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Affiliation(s)
- Kevin Renz Ambrocio
- Department of Communication Science and Disorders, University of Pittsburgh, Pittsburgh, PA
| | - Reagan Ramsey
- Department of Speech Pathology & Audiology, University of South Alabama, Mobile, AL
| | - Ashli O’Rourke
- Department of Otolaryngology – Head and Neck Surgery, Medical University of South Carolina, Charleston, SC
| | - Jonathan Beall
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC
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2
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Ruggiero L, Iovino P, Gargano D, Caloro A, De Leo L, D’Antonio A, Caputo A, Santonicola A. Upper Esophageal Sphincter Metrics across Eosinophilic Esophagitis, Gastroesophageal Reflux Disease and Functional Dysphagia: A Pilot Study. J Clin Med 2023; 12:5548. [PMID: 37685614 PMCID: PMC10488079 DOI: 10.3390/jcm12175548] [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: 07/08/2023] [Revised: 08/20/2023] [Accepted: 08/22/2023] [Indexed: 09/10/2023] Open
Abstract
BACKGROUND Recent studies have evaluated the upper esophageal sphincter (UES) with high-resolution manometry (HRM) in some esophageal diseases, but not eosinophilic esophagitis (EoE). The aim of our study was to evaluate the function of the UES across EoE, gastroesophageal reflux disease (GERD), functional dysphagia (FD), and the relationship with esophageal symptoms, esophageal body contraction, and esophagogastric junction (EGJ) metrics. METHODS HRM was performed on 30 EoE, 18 GERD, and 29 FD patients according to the Chicago Classification 3.0. The study data were exported to the online analysis platform Swallow Gateway. The UES was assessed in terms of UES Resting Pressure (UES-RP), UES Basal Pressure (UES-BP), UES Integrated Relaxation Pressure (UES-IRP), UES Relaxation Time (UES-RT), Basal UES Contractile Integral (Basal UES-CI), Post-Deglutitive UES Contractile Integral (Post-Deglutitive UES-CI), and Proximal Contractile Integral (PCI). RESULTS ANOVA analysis showed significantly higher values of Post-Deglutitive UES-CI in EoE patients compared with FD patients (p = 0.001). Basal UES-CI and UES-RP showed significantly higher values in EoE (p = 0.002, p = 0.038) and GERD (p < 0.001, p = 0.001) patients compared with FD patients. Correlations between LES-CI and Post-Deglutitive UES-CI, Basal UES-CI, and UES-RP (p ≤ 0.001, p = 0.027, p = 0.017, respectively), and between LES-BP and Post-Deglutitive UES-CI (p = 0.019), independent of diagnosis, were shown. No correlations have been demonstrated between the UES, EGJ metrics, and esophageal symptoms. CONCLUSIONS Some differences in UES metrics in the three different diseases were found. Further studies are needed to confirm the results of our pilot study and possible applications in clinical practice.
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Affiliation(s)
- Luigi Ruggiero
- Gastrointestinal Unit, Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84084 Baronissi, Italy; (L.R.); (P.I.); (A.C.); (L.D.L.)
| | - Paola Iovino
- Gastrointestinal Unit, Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84084 Baronissi, Italy; (L.R.); (P.I.); (A.C.); (L.D.L.)
| | - Domenico Gargano
- Allergy and Clinical Immunology Unit, San Giuseppe Moscati Hospital, 83100 Avellino, Italy;
| | - Angela Caloro
- Gastrointestinal Unit, Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84084 Baronissi, Italy; (L.R.); (P.I.); (A.C.); (L.D.L.)
| | - Luca De Leo
- Gastrointestinal Unit, Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84084 Baronissi, Italy; (L.R.); (P.I.); (A.C.); (L.D.L.)
| | - Antonio D’Antonio
- Pathologic Anatomy Unit, Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84084 Baronissi, Italy; (A.D.); (A.C.)
| | - Alessandro Caputo
- Pathologic Anatomy Unit, Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84084 Baronissi, Italy; (A.D.); (A.C.)
| | - Antonella Santonicola
- Gastrointestinal Unit, Department of Medicine, Surgery and Dentistry “Scuola Medica Salernitana”, University of Salerno, 84084 Baronissi, Italy; (L.R.); (P.I.); (A.C.); (L.D.L.)
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3
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Alfonsi E, Todisco M, Fresia M, Tassorelli C, Cosentino G. Electrokinesiographic Study of Oropharyngeal Swallowing in Neurogenic Dysphagia. Dysphagia 2023; 38:543-557. [PMID: 34313849 DOI: 10.1007/s00455-021-10336-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 06/23/2021] [Indexed: 01/04/2023]
Abstract
Electrokinesiographic study of swallowing (EKSS) can be useful for the assessment of patients with suspected or overt neurogenic dysphagia. EKSS consists of multichannel recording of the electromyographic (EMG) activity of the suprahyoid/submental muscle complex (SHEMG), the EMG activity of the cricopharyngeal muscle (CPEMG), and the laryngopharyngeal mechanogram (LPM). The LPM is an expression of the mechanical changes that the laryngopharyngeal structures undergo during the pharyngeal phase of swallowing. This method allows detailed evaluation of the magnitude, duration and temporal relations of the different events that characterize oropharyngeal swallowing, and thus in-depth exploration both of physiological deglutition mechanisms and of pathophysiological features of swallowing in neurogenic dysphagia. Furthermore, EKSS can guide dysphagia treatment strategies, allowing identification of optimal solutions for single patients. For instance, CPEMG recording can identify incomplete or absent relaxation of the upper esophageal sphincter during the pharyngeal phase of swallowing, thus suggesting a therapeutic approach based on botulinum toxin injection into the cricopharyngeal muscle. More recently, the 'shape' of SHEMG and the reproducibility of both SHEMG and LPM over repeated swallowing acts have been implemented as novel electrokinesiographic parameters. These measures could be valuable for straightforward non-invasive investigation of dysphagia severity and response to dysphagia treatment in clinical practice.
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Affiliation(s)
- Enrico Alfonsi
- Clinical Neurophysiology Unit, IRCCS Mondino Foundation, Via Mondino 2, 27100, Pavia, Italy.
| | - Massimiliano Todisco
- Clinical Neurophysiology Unit, IRCCS Mondino Foundation, Via Mondino 2, 27100, Pavia, Italy
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
| | - Mauro Fresia
- Clinical Neurophysiology Unit, IRCCS Mondino Foundation, Via Mondino 2, 27100, Pavia, Italy
| | - Cristina Tassorelli
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
- Neurorehabilitation Unit, IRCCS Mondino Foundation, Pavia, Italy
| | - Giuseppe Cosentino
- Clinical Neurophysiology Unit, IRCCS Mondino Foundation, Via Mondino 2, 27100, Pavia, Italy
- Department of Brain and Behavioral Sciences, University of Pavia, Pavia, Italy
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4
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Xie M, Wen H, Dou Z. Case report: A case of novel treatment for retrograde cricopharyngeal dysfunction. Front Neurol 2022; 13:1005655. [PMID: 36619911 PMCID: PMC9811257 DOI: 10.3389/fneur.2022.1005655] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 11/30/2022] [Indexed: 12/24/2022] Open
Abstract
Retrograde cricopharyngeal dysfunction (R-CPD) is a recently described disorder characterized by an inability to belch, excessive flatulence, unpleasant gurgling noises, and discomfort in the lower neck, chest, and abdomen. Herein, we describe a case of R-CPD in a 19-year-old man. The patient suffered from flatulence and was unable to belch since birth; auxiliary examination of his digestive system was normal. He was diagnosed with R-CPD based on clinical manifestations and laboratory results. He received an injection of botulinum toxin to the cricopharyngeal muscle under ultrasound, catheter balloon, and electromyographic guidance. His symptoms completely resolved 1 week after the injection.
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Calderon LF, Kline M, Hersh M, Shah KP, Kundu S, Tkaczuk A, McColloch N, Jain A. The Upper Esophageal Sphincter Distensibility Index Measured Using Functional Lumen Imaging Probe Identifies Defective Barrier Function of the Upper Esophageal Sphincter. J Neurogastroenterol Motil 2022; 28:463-473. [PMID: 35799240 PMCID: PMC9274470 DOI: 10.5056/jnm21197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 02/10/2022] [Accepted: 02/14/2022] [Indexed: 12/04/2022] Open
Abstract
Background/Aims The mechanism via which supra-esophageal symptoms are generated is unclear. We assessed upper esophageal sphincter (UES) function in novel fashion using functional lumen imaging probe (FLIP) topography. We hypothesize that symptoms related to aspiration of esophageal contents may be associated with a more distensible UES. Methods FLIP and reflux symptom index score data from patients undergoing diagnostic evaluation for an esophageal complaint over a 10-month period were analyzed retrospectively. UES distensibility on FLIP was studied at 40-70 mL volumes with in-depth analysis at 50 and 60 mL. Symptoms were compared between patients with low, middle, and high UES-distensibility index (UES-DI). Receiver-operating characteristic analysis was performed to determine associations between the UES-DI and individual reflux symptom index symptom item scores. Results One hundred and eleven subjects were included. Overall, the associations between UES-DI and symptoms that could be related to supra-esophageal aspiration were strongest at the 50 mL FLIP volume. Choking item score was highest in the high UES-DI group (2.8) vs 1.4 (P < 0.001) in the middle UES-DI and 1.1 (P = 0.004) in the low UES-DI groups. Similarly, the cough item score was highest in the high UES-DI group (2.7) vs 1.5 (P = 0.009) and 0.9 (P = 0.002) groups. Conclusion A higher UES-DI measures defective barrier function which could may be the main pathophysiology that generates supra-esophageal symptoms.
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Affiliation(s)
- Lucie F Calderon
- Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | | | - Marc Hersh
- Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - Kevin P Shah
- Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA
| | - Suprateek Kundu
- Department of Medicine, Emory Data Analytics and Biostatistics Core, Atlanta, GA, USA
| | - Andrew Tkaczuk
- Department of Otolaryngology, Emory University School of Medicine, Atlanta, GA, USA
| | - Nancy McColloch
- Department of Speech Pathology, Emory University School of Medicine, Atlanta, GA, USA
| | - AnS Jain
- Division of Digestive Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, GA, USA
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6
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Edeani FO, Kern M, Ulualp K, Kovacic K, Sanvanson P, Mei L, Shaker R. Variables influencing manometric parameters of deglutitive and non-deglutitive upper esophageal sphincter: A study of 89 asymptomatic participants. Neurogastroenterol Motil 2022; 34:e14175. [PMID: 34431179 PMCID: PMC10128622 DOI: 10.1111/nmo.14175] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 03/19/2021] [Accepted: 04/28/2021] [Indexed: 02/08/2023]
Abstract
BACKGROUND High-resolution manometry overcomes limitations imposed by axial and radial asymmetry as well as swallow and respiration-induced movement of the upper esophageal sphincter (UES), allowing for its reliable use in evaluation of dysphagic and reflux patients. The aim of this study was to determine normative values and their variability across position, sex, age, height, weight, BMI, and volume for clinically relevant deglutitive and non-deglutitive UES parameters. METHODS We studied 89 asymptomatic volunteers age 19-90 years, (45 female) during 3-10 repetitions of dry, 5 and 10 ml water swallows at 30-s intervals using high-resolution manometry. KEY RESULTS Upper esophageal sphincter high-pressure zone was longer in men than women and in supine than upright position. UES basal contractile integral and mean basal pressure were higher in supine compared to upright; higher in men than women, inversely correlated with age, correlated positively with height and with weight in the supine position only. UES relaxation duration was longer in upright than in supine position but not affected by age, sex, height, weight, or BMI. It was longer with 5 and 10 ml compared with dry swallows. UES minimum/nadir relaxation and mean relaxation pressures were lower in upright than supine position, increased with increase in age and were higher in men than women. CONCLUSIONS AND INFERENCES Position, sex, age, height, weight, and volume affect some deglutitive and non-deglutitve UES manometric parameters. BMI does not affect the studied manometric parameters. These effects should be taken into consideration in clinical evaluation of UES.
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Affiliation(s)
- Francis O Edeani
- Division of Gastroenterology and Hepatology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Mark Kern
- Division of Gastroenterology and Hepatology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Kenan Ulualp
- Division of Gastroenterology and Hepatology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Karlo Kovacic
- Center for Pediatric Neurogastroenterology, Motility, and Autonomic Disorders, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Patrick Sanvanson
- Division of Gastroenterology and Hepatology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Ling Mei
- Division of Gastroenterology and Hepatology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Reza Shaker
- Division of Gastroenterology and Hepatology, Medical College of Wisconsin, Milwaukee, WI, USA
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7
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Xie M, Zeng P, Wan G, An D, Tang Z, Li C, Wei X, Shi J, Zhang Y, Dou Z, Wen H. The Effect of Combined Guidance of Botulinum Toxin Injection with Ultrasound, Catheter Balloon, and Electromyography on Neurogenic Cricopharyngeal Dysfunction: A Prospective Study. Dysphagia 2021; 37:601-611. [PMID: 33928464 DOI: 10.1007/s00455-021-10310-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Accepted: 04/20/2021] [Indexed: 12/27/2022]
Abstract
BACKGROUND Cricopharyngeal botulinum toxin (BTX) injection is one of the treatments for neurogenic cricopharyngeal dysfunction (CPD). We conducted this prospective study to investigate the effect and safety of BTX injection for neurogenic CPD with a novel guidance. METHODS Twenty-one patients with neurogenic CPD whose symptoms did not reduce after conventional swallowing therapy were included in this study. The impact of BTX injection on the swallowing function of the patients was evaluated. KEY RESULTS After the injection, the Functional Oral Intake Scale (FOIS) score increased in 17 of 21 patients (80.9%), which ranged from 1 to 3 (P < 0.001). Moreover, there was a significant reduction in the UES opening impairment (P < 0.01), UES residual pressure (P < 0.05), duration of UES relaxation, penetration-aspiration scale score (P < 0.05), secretion (P < 0.05), vallecular residue (P < 0.01), and left (P < 0.05) and right (P < 0.05) pyriform sinus residue. With at least 6 months of follow-up, we found that FOIS continued to increase in patients who showed improvement after the injection (i.e., FOIS 5-7 points), while it remained unchanged in patients without improvement after the injection. There were no side effects reported in this study. CONCLUSION & INFERENCES BTX injection into the cricopharyngeal muscle guided by ultrasound, catheter balloon, and electromyography possibly has a long-lasting effect that can effectively and safely improve the swallowing function of patients with neurogenic CPD.
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Affiliation(s)
- Mengshu Xie
- Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, 600 Tianhe Road, Guangzhou, 510630, Guangdong Province, China
| | - Peishan Zeng
- Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, 600 Tianhe Road, Guangzhou, 510630, Guangdong Province, China
| | - Guifang Wan
- Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, 600 Tianhe Road, Guangzhou, 510630, Guangdong Province, China
| | - Delian An
- Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, 600 Tianhe Road, Guangzhou, 510630, Guangdong Province, China
| | - Zhiming Tang
- Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, 600 Tianhe Road, Guangzhou, 510630, Guangdong Province, China
| | - Chao Li
- Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, 600 Tianhe Road, Guangzhou, 510630, Guangdong Province, China
| | - Xiaomei Wei
- Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, 600 Tianhe Road, Guangzhou, 510630, Guangdong Province, China
| | - Jing Shi
- Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, 600 Tianhe Road, Guangzhou, 510630, Guangdong Province, China
| | - Yaowen Zhang
- Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, 600 Tianhe Road, Guangzhou, 510630, Guangdong Province, China
| | - Zulin Dou
- Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, 600 Tianhe Road, Guangzhou, 510630, Guangdong Province, China.
| | - Hongmei Wen
- Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-Sen University, 600 Tianhe Road, Guangzhou, 510630, Guangdong Province, China.
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Donohue C, Khalifa Y, Perera S, Sejdić E, Coyle JL. How Closely do Machine Ratings of Duration of UES Opening During Videofluoroscopy Approximate Clinician Ratings Using Temporal Kinematic Analyses and the MBSImP? Dysphagia 2020; 36:707-718. [PMID: 32955619 DOI: 10.1007/s00455-020-10191-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Accepted: 09/14/2020] [Indexed: 10/23/2022]
Abstract
Clinicians evaluate swallow kinematic events by analyzing videofluoroscopy (VF) images for dysphagia management. The duration of upper esophageal sphincter opening (DUESO) is one important temporal swallow event, because reduced DUESO can result in pharyngeal residue and penetration/aspiration. VF is frequently used for evaluating swallowing but exposes patients to radiation and is not always feasible/readily available. High resolution cervical auscultation (HRCA) is a non-invasive, sensor-based dysphagia screening method that uses signal processing and machine learning to characterize swallowing. We investigated HRCA's ability to annotate DUESO and predict Modified Barium Swallow Impairment Profile (MBSImP) scores (component #14). We hypothesized that HRCA and machine learning techniques would detect DUESO with similar accuracy as human judges. Trained judges completed temporal kinematic measurements of DUESO on 719 swallows (116 patients) and 50 swallows (15 age-matched healthy adults). An MBSImP certified clinician completed MBSImP ratings on 100 swallows. A multi-layer convolutional recurrent neural network (CRNN) using HRCA signal features for input was used to detect DUESO. Generalized estimating equations models were used to determine statistically significant HRCA signal features for predicting DUESO MBSImP scores. A support vector machine (SVM) classifier and a leave-one-out procedure was used to predict DUESO MBSImP scores. The CRNN detected UES opening within a 3-frame tolerance for 82.6% of patient and 86% of healthy swallows and UES closure for 72.3% of patient and 64% of healthy swallows. The SVM classifier predicted DUESO MBSImP scores with 85.7% accuracy. This study provides evidence of HRCA's feasibility in detecting DUESO without VF images.
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Affiliation(s)
- Cara Donohue
- Department of Communication Science and Disorders, School of Health and Rehabilitation Sciences, University of Pittsburgh, 6035 Forbes Tower, Pittsburgh, PA, 15260, USA
| | - Yassin Khalifa
- Department of Electrical and Computer Engineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Subashan Perera
- Division of Geriatrics, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, 15261, USA
| | - Ervin Sejdić
- Department of Electrical and Computer Engineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, 15260, USA.,Department of Bioengineering, Swanson School of Engineering, University of Pittsburgh, Pittsburgh, PA, 15260, USA.,Department of Biomedical Informatics, School of Medicine, University of Pittsburgh, Pittsburgh, PA, 15260, USA.,Intelligent Systems Program, School of Computing and Information, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - James L Coyle
- Department of Communication Science and Disorders, School of Health and Rehabilitation Sciences, University of Pittsburgh, 6035 Forbes Tower, Pittsburgh, PA, 15260, USA.
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9
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Yamamoto M, Hashimoto K, Honkura Y, Murakami G, Abe H, Rodríguez-Vázquez JF, Abe SI. Morphology of the Upper Esophageal Sphincter or Cricopharyngeus Muscle Revisited: A Study Using Adult and Fetal Specimens. Clin Anat 2019; 33:782-794. [PMID: 31659797 DOI: 10.1002/ca.23506] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 09/17/2019] [Accepted: 10/15/2019] [Indexed: 12/15/2022]
Abstract
Histological examination of specimens from 22 donated elderly cadavers and 15 human fetuses revealed that the cricopharyngeus muscle (CPM) provided (1) posterior circular muscle fibers adjacent to the external aspect of the uppermost esophageal circular muscle and (2) a thin anterior sling connecting to that same muscle. Another thick lateral bundle of longitudinal muscle originated independently from a fascia covering the posterior cricoarytenoideus muscle, extended laterally and posteriorly, and occupied a space after the CPM had disappeared at the anterolateral angle of the esophagus below the cricoid. The thick fascia contained abundant elastic fibers along the internal surface of the pharyngeal constrictors (posteromedial elastic lamina), but was interrupted or discontinued near the cricoid origin of the CPM. As no submucosal smooth muscles or elastic fibers were connected to it, the CPM did not accompany a specific elastic structure at the interface between the pharyngeal and esophageal muscles. In fetuses, the medial half of the CPM was inserted into the cricoid while the lateral half continued to the sternothyroideus muscle or ended at a fascia covering the cricothyroideus. These anterolateral ends provided a mechanical load for longitudinal growth of the pharyngeal constrictors. Consequently, the CPM was unlikely to develop and grow to form the upper esophageal sphincter, and the muscle bundle crossing the lateral aspect of the pharyngo-esophageal junction appeared to have a secondary passive role as a sphincter. This situation contrasts with that of another sphincter in the human body formed from striated muscle. Clin. Anat., 33:782-794, 2020. © 2019 Wiley Periodicals, Inc.
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Affiliation(s)
- Masahito Yamamoto
- Department of Anatomy, Tokyo Dental College, Chiyoda-ku, Tokyo, Japan.,Tokyo Dental College Research Branding Project, Tokyo Dental College, Chiyoda-ku, Tokyo, Japan
| | - Keishi Hashimoto
- Department of Anatomy, Tokyo Dental College, Chiyoda-ku, Tokyo, Japan.,Tokyo Dental College Research Branding Project, Tokyo Dental College, Chiyoda-ku, Tokyo, Japan
| | - Yohei Honkura
- Department of Otolaryngology-Head and Neck Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan
| | - Gen Murakami
- Department of Anatomy, Tokyo Dental College, Chiyoda-ku, Tokyo, Japan.,Division of Internal Medicine, Sapporo Asuka Hospital, Sapporo, Japan
| | - Hiroshi Abe
- Department of Anatomy, Akita University School of Medicine, Akita, Japan
| | | | - Shin-Ichi Abe
- Department of Anatomy, Tokyo Dental College, Chiyoda-ku, Tokyo, Japan.,Tokyo Dental College Research Branding Project, Tokyo Dental College, Chiyoda-ku, Tokyo, Japan
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10
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Hayashi S, Hirouchi H, Murakami G, Wilting J, Rodríguez-Vázquez JF, Kim JH. Transient connection or origin of the inferior pharyngeal constrictor during fetal development: A study using human fetal sagittal sections. Ann Anat 2019; 228:151438. [PMID: 31726208 DOI: 10.1016/j.aanat.2019.151438] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 10/03/2019] [Accepted: 10/29/2019] [Indexed: 11/19/2022]
Abstract
The inferior pharyngeal constrictor (IPC) originates from the thyroid and cricoid cartilages and inserts to the pharyngeal raphe. In serial sagittal sections of 37 embryos and fetuses at 6-15 weeks (crown rump length 15-115mm), we found (1) the IPC connecting to the sternothyroideus and thyrohyoideus muscles (16 fetuses at 6-11 weeks) or (2) the cricothyroideus muscle (6 fetuses at 12-15 weeks) in addition to the usual cricoid origin. These aberrant connections were most likely to be transient origins of the IPC not from a hard tissue but nearby striated muscles. In four of the latter six specimens, a tendinous band from the IPC inferior end connected to the cricothyroideus muscle to provide a digastric muscle-like appearance. These aberrant connections with nearby muscles seemed to become separated by a growing protrusion of the thyroid cartilage. Therefore, these aberrant origins were, even if developed, most likely to be "corrected" to the adult morphology during midterm or late prenatal period. The aberrant or transient origin of the IPC seemed to result from a discrepancy in growth of the cartilage and muscles. Such a discrepancy in growth seems to resemble the IPC wrapping around the superior cornu of thyroid cartilage. In addition, a final or adult-like morphology was found in two of the present 37 fetal specimens. It seemed to suggest a significant redundancy in growth rate of the laryngeal structures.
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Affiliation(s)
- Shogo Hayashi
- Department of Anatomy, School of Medicine, International University of Health and Welfare, Narita, Chiba, Japan.
| | - Hidetomo Hirouchi
- Department of Anatomy, Tokyo Dental College, Chiyoda-ku, Tokyo, Japan
| | - Gen Murakami
- Division of Internal Medicine, Jikou-kai Clinic of Home Visits, Sapporo, Hokkaido, Japan
| | - Jörg Wilting
- Department of Anatomy, School of Medicine, Georg-August-Universität Gőttingen, Gőttingen, Germany
| | | | - Ji Hyun Kim
- Department of Anatomy, Chonbuk National University Medical School, Deokjin-gu, Jeonju, South Korea
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11
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Wattanapan P, Kagaya H, Inamoto Y, Saitoh E, Shibata S, Iida T. Evaluation of Pharyngoesophageal Segment Using 320-Row Area Detector Computed Tomography. Ann Otol Rhinol Laryngol 2018; 127:888-894. [PMID: 30255711 DOI: 10.1177/0003489418802283] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
OBJECTIVES: The aim of this study was to determine the shape and area of the pharyngoesophageal segment (PES) during swallowing using 320-row area detector computed tomography, which can acquire a volume data set covering a 16-cm area in a single rotation. METHODS: Twenty healthy subjects were scanned during swallowing 3, 10, and 20 mL of honey-thick barium (5% w/v). PES was identified using cross-sectional images of 0.5-mm slice thickness, and the area in each section was measured. RESULTS: The PES opening area and the anteroposterior and lateral diameters of the PES were volume dependent. However, there was no statistical difference in anteroposterior and lateral diameters between 3- and 10-mL bolus swallowing. CONCLUSIONS: Three hundred twenty-row area detector computed tomography provided new information about PES. This technique will facilitate further understanding of the mechanisms of PES opening and swallowing physiology.
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Affiliation(s)
- Pattra Wattanapan
- 1 Department of Rehabilitation I, School of Medicine, Fujita Health University, Toyoake, Aichi, Japan.,2 Department of Rehabilitation Medicine, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Hitoshi Kagaya
- 1 Department of Rehabilitation I, School of Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Yoko Inamoto
- 3 Faculty of Rehabilitation, School of Health Sciences, Fujita Health University, Toyoake, Aichi, Japan
| | - Eiichi Saitoh
- 1 Department of Rehabilitation I, School of Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Seiko Shibata
- 1 Department of Rehabilitation I, School of Medicine, Fujita Health University, Toyoake, Aichi, Japan
| | - Takatoshi Iida
- 1 Department of Rehabilitation I, School of Medicine, Fujita Health University, Toyoake, Aichi, Japan.,4 Department of Critical Care Medicine and Dentistry, Kanagawa Dental University, Yokosuka, Kanagawa, Japan
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12
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Wei X, Yu F, Dai M, Xie C, Wan G, Wang Y, Dou Z. Change in Excitability of Cortical Projection After Modified Catheter Balloon Dilatation Therapy in Brainstem Stroke Patients with Dysphagia: A Prospective Controlled Study. Dysphagia 2017; 32:645-656. [PMID: 28550485 PMCID: PMC5608794 DOI: 10.1007/s00455-017-9810-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 05/11/2017] [Indexed: 12/30/2022]
Abstract
Although the modified balloon dilatation therapy has been demonstrated to improve pharyngeal swallowing function post stroke, the underlying neural mechanisms of improvement are unknown. Our aims are (1) to investigate the effect of modified balloon dilatation on the excitability of corticobulbar projections to the submental muscle in dysphagic patients with brainstem stroke and (2) the relation between changes in excitability and pharyngeal kinematic modifications. Thirty patients with upper esophageal sphincter (UES) dysfunction due to unilateral brainstem stroke were recruited into two groups. The patients in dilatation group received modified balloon dilatation and conventional therapies, and those in control were only treated by conventional therapies (twice per day). The amplitudes of bilateral submental motor evoked potentials (MEPs) induced by transcranial magnetic stimulations over bilateral motor cortex, diameters of UES opening (UOD) and maximal displacement of hyoid (HD) were all assessed at baseline and the endpoint of treatments. Repeated ANOVA analysis revealed significant main effect of group, time and MEP laterality on MEP amplitudes (p = 0.02). There were no differences in the pretreatment measures between groups (all p > 0.05). After treatment, the amplitudes of affected submental MEP evoked by ipsilateral cortical pulse as well as UOD and HD were significantly different in dilatation group compared to control (amplitude: p = 0.02, UOD: p < 0.001, HD: p = 0.03). The differences of pre- and post-treatment amplitudes of the affected MEP evoked by ipsilateral stimulation showed a positive correlation with the improvement of HD (dilatation: R 2 = 0.51, p = 0.03; control: R 2 = 0.39, p = 0.01), rather than UOD in both groups (all p > 0.05). In conclusion, modified balloon dilatation therapy can increase the excitability of affected projection in patients with unilateral brainstem stroke.
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Affiliation(s)
- Xiaomei Wei
- 0000 0001 2360 039Xgrid.12981.33Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-sen University, No. 600, Tianhe Road, Guangzhou, 510630 Guangdong China
| | - Fan Yu
- 0000 0001 2360 039Xgrid.12981.33Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-sen University, No. 600, Tianhe Road, Guangzhou, 510630 Guangdong China
- 0000 0004 1760 4628grid.412478.cDepartment of Rehabilitation Medicine, Shanghai General Hospital, No. 100 Haining Road, Hongkou District, Shanghai, 200080 China
| | - Meng Dai
- 0000 0001 2360 039Xgrid.12981.33Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-sen University, No. 600, Tianhe Road, Guangzhou, 510630 Guangdong China
| | - Chunqing Xie
- 0000 0001 2360 039Xgrid.12981.33Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-sen University, No. 600, Tianhe Road, Guangzhou, 510630 Guangdong China
| | - Guifang Wan
- 0000 0001 2360 039Xgrid.12981.33Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-sen University, No. 600, Tianhe Road, Guangzhou, 510630 Guangdong China
| | - Yujue Wang
- 0000 0001 2360 039Xgrid.12981.33Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-sen University, No. 600, Tianhe Road, Guangzhou, 510630 Guangdong China
| | - Zulin Dou
- 0000 0001 2360 039Xgrid.12981.33Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-sen University, No. 600, Tianhe Road, Guangzhou, 510630 Guangdong China
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Alfonsi E, Restivo DA, Cosentino G, De Icco R, Bertino G, Schindler A, Todisco M, Fresia M, Cortese A, Prunetti P, Ramusino MC, Moglia A, Sandrini G, Tassorelli C. Botulinum Toxin Is Effective in the Management of Neurogenic Dysphagia. Clinical-Electrophysiological Findings and Tips on Safety in Different Neurological Disorders. Front Pharmacol 2017. [DOI: 10.3389/fphar.2017.00080
expr 972239475 + 919074045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023] Open
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14
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Alfonsi E, Restivo DA, Cosentino G, De Icco R, Bertino G, Schindler A, Todisco M, Fresia M, Cortese A, Prunetti P, Ramusino MC, Moglia A, Sandrini G, Tassorelli C. Botulinum Toxin Is Effective in the Management of Neurogenic Dysphagia. Clinical-Electrophysiological Findings and Tips on Safety in Different Neurological Disorders. Front Pharmacol 2017; 8:80. [PMID: 28275351 PMCID: PMC5319993 DOI: 10.3389/fphar.2017.00080] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 02/08/2017] [Indexed: 02/03/2023] Open
Abstract
Background and Aims: Neurogenic dysphagia linked to failed relaxation of the upper esophageal sphincter (UES) can be treated by injecting botulinum toxin (BTX) into the cricopharyngeal (CP) muscle. We compared the effects of this treatment in different neurological disorders with dysphagia, to evaluate its efficacy over time including the response to a second injection. Materials and Methods: Sixty-seven patients with neurogenic dysphagia associated with incomplete or absent opening of the UES (24 with brainstem or hemispheric stroke, 21 with parkinsonian syndromes, 12 with multiple sclerosis, and 10 with spastic-dystonic syndromes secondary to post-traumatic encephalopathy) were treated with the injection of IncobotulinumtoxinA (dose 15-20 U) into the CP muscle under electromyographic guidance. The patients were assessed at baseline and after the first and second treatment through clinical evaluation and fiberoptic endoscopy of swallowing, while their dysphagia was quantified using the Dysphagia Outcome and Severity Scale (DOSS). An electrokinesiographic/electromyographic study of swallowing was performed at baseline. Results: Most patients responded to the first BTX treatment: 35 patients (52.2%) were classified as high responders (DOSS score increase >2 levels), while other 19 patients (28.4%) were low responders (DOSS score increase of ≤2 levels). The effect of the first treatment usually lasted longer than 4 months (67%), and in some cases up to a year. The treatment efficacy remained high also after the second injection: 31 patients (46.3%) qualified as high responders and other 22 patients (32.8%) showed a low response. Only in the parkinsonian syndromes group we observed a reduction in the percentage of high responders as compared with the first treatment. Side effects were mostly mild and reported in non-responders following the first injection. A severe side effect, consisting of ingestion pneumonia, was observed following the second BTX injection in two patients who had both been non-responders to the first. Non-responders were characterized electromyographically by higher values of the oropharyngeal interval. Conclusion: These findings confirm the effectiveness of IncobotulinumtoxinA injection in the treatment of neurogenic dysphagia due to hyperactivity and relaxation failure of the UES. Caution should be used as regards, the re-injection in non-responders to the first treatment.
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Affiliation(s)
- Enrico Alfonsi
- Department of Neurophysiopathology, National Neurological Institute "C. Mondino" (IRCCS) Pavia, Italy
| | | | - Giuseppe Cosentino
- Department of Biomedicine and Clinical Neuroscience, University of Palermo Palermo, Italy
| | - Roberto De Icco
- Department of Neurophysiopathology, National Neurological Institute "C. Mondino" (IRCCS)Pavia, Italy; Department of Brain and Behavioral Sciences, University of PaviaPavia, Italy
| | - Giulia Bertino
- Department of Otolaryngology, San Matteo Hospital, University of Pavia Pavia, Italy
| | - Antonio Schindler
- Department of Clinical Sciences "Luigi Sacco", University of Milan Milan, Italy
| | - Massimiliano Todisco
- Department of Neurophysiopathology, National Neurological Institute "C. Mondino" (IRCCS)Pavia, Italy; Department of Brain and Behavioral Sciences, University of PaviaPavia, Italy
| | - Mauro Fresia
- Department of Neurophysiopathology, National Neurological Institute "C. Mondino" (IRCCS) Pavia, Italy
| | - Andrea Cortese
- Department of Neurophysiopathology, National Neurological Institute "C. Mondino" (IRCCS) Pavia, Italy
| | - Paolo Prunetti
- Department of Neurophysiopathology, National Neurological Institute "C. Mondino" (IRCCS)Pavia, Italy; Department of Brain and Behavioral Sciences, University of PaviaPavia, Italy
| | - Matteo C Ramusino
- Department of Neurophysiopathology, National Neurological Institute "C. Mondino" (IRCCS)Pavia, Italy; Department of Brain and Behavioral Sciences, University of PaviaPavia, Italy
| | - Arrigo Moglia
- Department of Neurophysiopathology, National Neurological Institute "C. Mondino" (IRCCS)Pavia, Italy; Department of Brain and Behavioral Sciences, University of PaviaPavia, Italy
| | - Giorgio Sandrini
- Department of Neurophysiopathology, National Neurological Institute "C. Mondino" (IRCCS)Pavia, Italy; Department of Brain and Behavioral Sciences, University of PaviaPavia, Italy
| | - Cristina Tassorelli
- Department of Neurophysiopathology, National Neurological Institute "C. Mondino" (IRCCS)Pavia, Italy; Department of Brain and Behavioral Sciences, University of PaviaPavia, Italy
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Rhee S, Yamamoto M, Kitamura K, Masaaki K, Katori Y, Murakami G, Abe SI. Macrophage density in pharyngeal and laryngeal muscles greatly exceeds that in other striated muscles: an immunohistochemical study using elderly human cadavers. Anat Cell Biol 2016; 49:177-183. [PMID: 27722010 PMCID: PMC5052226 DOI: 10.5115/acb.2016.49.3.177] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 07/29/2016] [Accepted: 08/17/2016] [Indexed: 01/06/2023] Open
Abstract
Macrophages play an important role in aging-related muscle atrophy (i.e., sarcopenia). We examined macrophage density in six striated muscles (cricopharyngeus muscle, posterior cricoarytenoideus muscle, genioglossus muscle, masseter muscle, infraspinatus muscle, and external anal sphincter). We examined 14 donated male cadavers and utilized CD68 immunohistochemistry to clarify macrophage density in muscles. The numbers of macrophages per striated muscle fiber in the larynx and pharynx (0.34 and 0.31) were 5–6 times greater than those in the tongue, shoulder, and anus (0.05–0.07) with high statistical significance. Thick muscle fibers over 80 µm in diameter were seen in the pharynx, larynx, and anal sphincter of two limited specimens. Conversely, in the other sites or specimens, muscle fibers were thinner than 50 µm. We did not find any multinuclear muscle cells suggestive of regeneration. At the beginning of the study, we suspected that mucosal macrophages might have invaded into the muscle layer of the larynx and pharynx, but we found no evidence of inflammation in the mucosa. Likewise, the internal anal sphincter (a smooth muscle layer near the mucosa) usually contained fewer macrophages than the external sphincter. The present result suggest that, in elderly men, thinning and death of striated muscle fibers occur more frequently in the larynx and pharynx than in other parts of the body.
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Affiliation(s)
- Sunki Rhee
- Department of Anatomy, Tokyo Dental College, Tokyo, Japan
| | | | - Kei Kitamura
- Department of Anatomy, Tokyo Dental College, Tokyo, Japan
| | | | - Yukio Katori
- Department of Otorhinolaryngology, Tohoku University School of Medicine, Sendai, Japan
| | - Gen Murakami
- Division of Internal Medicine, Iwamizawa Asuka Hospital, Iwamizawa, Japan
| | - Shin-Ichi Abe
- Department of Anatomy, Tokyo Dental College, Tokyo, Japan
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16
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Kawamoto-Hirano A, Honkura Y, Yamamoto M, Abe SI, Murakami G, Katori Y. Submucosal Elastic Laminae of the Middle and Lower Pharynx: A Histological Study Using Elderly Cadaveric Specimens. Dysphagia 2016; 31:635-43. [DOI: 10.1007/s00455-016-9721-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 06/17/2016] [Indexed: 11/28/2022]
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Abstract
The upper esophageal sphincter (UES) forms a barrier between the pharynx and the esophagus. When opened, the UES allows the food bolus to pass into the esophagus, as well as permitting emesis and eructation. The basal sphincter tone constitutes a barrier function which serves to prevent reflux and passive aerophagia in the case of deep breathing. Basal sphincter tone is dependent on several influencing factors; during swallowing, sphincter opening and closure follow a complex multiphase pattern. This article presents an overview of the current understanding of UES physiology.
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18
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Abstract
The upper esophageal sphincter (UES) forms a barrier between the pharynx and the esophagus. When closed, the barrier function serves to prevent reflux and aerophagia; when open, swallowing, belching and vomiting are possible. The closing muscles include caudal parts of the inferior pharyngeal sphincter and cranial parts of the upper esophagus musculature. Sphincter opening is achieved by muscles that insert from the outside to connect to the larynx and pharynx in the sphincter region. The closing muscles are innervated by branches of the glossopharyngeal and vagal nerves, and central control is probably mediated by several reflexes. This article presents an overview of the current understanding of the complex UES anatomy.
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19
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Savary dilation is a safe and effective long-term means of treatment of symptomatic cricopharyngeal bar: a single-center experience. J Clin Gastroenterol 2014; 48:500-4. [PMID: 24231933 DOI: 10.1097/mcg.0000000000000026] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
GOALS Dilation of a cricopharyngeal (CP) bar can be a safe and effective means of nonsurgical treatment as elderly patient population has high morbidity and is at a higher risk of surgical complications. BACKGROUND CP bar is a relatively uncommon radiologic finding, which is an infrequent cause of oropharyngeal dysphagia in the elderly population. METHODS Patients were included in study from January 2007 to January 2012, if their dysphagia was solely attributed to CP bar on predilation radiologic imaging by either modified barium swallow or barium esophagogram. A functional outcome swallowing score (FOSS) was calculated at 1, 4, and 6 months from initial and last dilation performed. RESULTS A total of 31 patients with a mean age of 71.65 (54 to 88) years and mean body mass index 27.81 (15 to 41) were included in the study. Over the time period of 5 years, a total of 53 dilations were performed. The median predilation FOSS was 3. The median postdilation FOSS was 1 at the end of 6 months from last dilation performed. There were no immediate or remote complications. CONCLUSIONS On follow-up from first dilation, 65% patients had statistically significant improvement in FOSS lasting for at least 6 months. Savary dilation seems to be a safe and effective treatment for symptomatic CP bar patients.
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Jungheim M, Janhsen AM, Miller S, Ptok M. Impact of Neuromuscular Electrical Stimulation on Upper Esophageal Sphincter Dynamics. Ann Otol Rhinol Laryngol 2014; 124:5-12. [DOI: 10.1177/0003489414539132] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Objectives: Beside traditional dysphagia therapy, neuromuscular electrical stimulation (NMES) has been proposed to treat patients with dysphagia. Considering the complexity of the nerve-muscle interaction during swallowing, the underlying physiology of NMES remains unclear. Here, we addressed the question of whether NMES can modify upper esophageal sphincter (UES) dynamics. Methods: In a prospective study, 26 healthy volunteers performed water swallows with and without NMES. The stimulus was applied in a participant- and operator-initiated stimulation above, near, and below the motor threshold. Swallowing parameters were measured using high-resolution manometry. Results: The UES relaxation time was found to be extended by 10%, indicating a modification in UES dynamics. Conclusions: The chosen NMES paradigm influenced the involuntary swallowing phase by extending relaxation time, providing more time for bolus passage into the esophagus. Future studies will have to evaluate if this effect can be found in patients with dysphagia and whether it is beneficial for treatment.
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Affiliation(s)
- Michael Jungheim
- Department of Phoniatrics and Pediatric Audiology, Hannover Medical School, Hannover, Germany
| | | | - Simone Miller
- Department of Phoniatrics and Pediatric Audiology, Hannover Medical School, Hannover, Germany
| | - Martin Ptok
- Department of Phoniatrics and Pediatric Audiology, Hannover Medical School, Hannover, Germany
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21
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DeVault K, McMahon BP, Celebi A, Costamagna G, Marchese M, Clarke JO, Hejazi RA, McCallum RW, Savarino V, Zentilin P, Savarino E, Thomson M, Souza RF, Donohoe CL, O'Farrell NJ, Reynolds JV. Defining esophageal landmarks, gastroesophageal reflux disease, and Barrett's esophagus. Ann N Y Acad Sci 2013; 1300:278-295. [PMID: 24117649 DOI: 10.1111/nyas.12253] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The following paper on gastroesophageal reflux disease (GERD) and Barrett's esophagus (BE) includes commentaries on defining esophageal landmarks; new techniques for evaluating upper esophageal sphincter (UES) tone; differential diagnosis of GERD, BE, and hiatal hernia (HH); the use of high-resolution manometry for evaluation of reflux; the role of fundic relaxation in reflux; the use of 24-h esophageal pH-impedance testing in differentiating acid from nonacid reflux and its potential inclusion in future Rome criteria; classification of endoscopic findings in GERD; the search for the cell origin that generates BE; and the relationship between BE, Barrett's carcinoma, and obesity.
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Affiliation(s)
| | - Barry P McMahon
- Trinity Academic Gastroenterology Group, Tallaght Hospital, Dublin, Ireland
| | - Altay Celebi
- Kocaeli University Medical Facility, Kocaeli, Turkey
| | - Guido Costamagna
- Digestive Endoscopy Unit, Catholic University of Rome, Rome, Italy
| | - Michele Marchese
- Digestive Endoscopy Unit, Catholic University of Rome, Rome, Italy
| | - John O Clarke
- Division of Gastroenterology, Johns Hopkins University, Baltimore, Maryland
| | - Reza A Hejazi
- Department of Internal Medicine, Texas Tech University Health Sciences Center, El Paso, Texas
| | - Richard W McCallum
- Department of Internal Medicine, Texas Tech University Health Sciences Center, El Paso, Texas
| | - Vincenzo Savarino
- Department of Surgical, Oncological and Gastroenterological Sciences, University of Padua, Padua, Italy
| | | | - Edoardo Savarino
- Department of Internal Medicine, University of Genoa, Genoa, Italy
| | - Mike Thomson
- Centre for Paediatric Gastroenterology, Sheffield Children's Hospital, Sheffield, United Kingdom
| | - Rhonda F Souza
- Departments of Medicine, University of Texas Southwestern Medical Center and the VA North Texas Health Care System, Dallas, Texas
| | - Claire L Donohoe
- Trinity College Dublin/St James' Hospital, Trinity Centre for Health Sciences, St James' Hospital, Dublin, Ireland
| | - Naoimh J O'Farrell
- Trinity College Dublin/St James' Hospital, Trinity Centre for Health Sciences, St James' Hospital, Dublin, Ireland
| | - John V Reynolds
- Trinity College Dublin/St James' Hospital, Trinity Centre for Health Sciences, St James' Hospital, Dublin, Ireland
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Abstract
BACKGROUND High-resolution manometry (HRM) represents a valuable tool for the evaluation of peristalsis in the oesophagus. Due to the wide spacing of the pressure transducers, however, examination of the upper oesophageal sphincter's relaxation period has not proved satisfactory as yet. DESIGN A feasibility study was carried out to clarify whether evaluation of the upper oesophageal sphincter's behaviour during swallows is possible using a catheter with very closely spaced pressure transducers. SETTING University hospital. PROCEDURE Healthy subjects were analysed using a specially developed catheter as well as a modified software to evaluate whether swallow-associated behaviour could be verified. RESULTS Interpreting pressure profiles in terms of resting pressure, residual pressure, relaxation time and maximum peristaltic pressure proved to be feasible. The present analysis supports the existence of distinct dynamic swallow-associated phases, which conform to the phases that had previously been postulated. An additional initial phase, however, should be added. CONCLUSION This newly created catheter design in combination with the modified software enable a very detailed evaluation of the sphincter's swallow-associated behaviour and represent a valuable, minimally invasive tool with no exposure to radiation for dysphagia diagnosis as well as treatment planning.
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Affiliation(s)
- S Meyer
- Klinik und Poliklinik für Phoniatrie und Pädaudiologie, Medizinische Hochschule Hannover, Carl-Neuberg-Str. 1, 30625 Hannover, Germany
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Dou Z, Zu Y, Wen H, Wan G, Jiang L, Hu Y. The effect of different catheter balloon dilatation modes on cricopharyngeal dysfunction in patients with dysphagia. Dysphagia 2012; 27:514-20. [PMID: 22427310 DOI: 10.1007/s00455-012-9402-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2011] [Accepted: 02/22/2012] [Indexed: 10/28/2022]
Abstract
The primary aim of this study was to investigate the outcomes of two different modes (active and passive) of balloon dilatation therapy on cricopharyngeal dysfunction (CPD). Thirty-eight CPD patients with neurological disorders were recruited between 2006 and 2010. Twenty-one of them received active balloon dilatation therapy, and the remaining 17 received passive dilatation therapy for an average of 4 weeks. The patients' swallowing function before and after the intervention was evaluated using the Functional Oral Intake Scale (FOIS) and the upper esophageal sphincter (UES) opening was studied with the videofluoroscopic swallow study. Both modes of balloon dilatation therapy yielded improvements in the FOIS (active group: z = -3.767, p < 0.001; passive group: z = -3.472, p < 0.001) and the UES opening (both groups: p < 0.01). Active dilatation showed a significantly better FOIS result (p = 0.028) than passive dilatation for CPD. Both active and passive balloon dilatation benefits patients with neurological disorders but active balloon dilatation is better.
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Affiliation(s)
- Zulin Dou
- Department of Rehabilitation Medicine, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
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Regan J, Walshe M, McMahon BP. Current evaluation of upper oesophageal sphincter opening in dysphagia practice: an international SLT survey. INTERNATIONAL JOURNAL OF LANGUAGE & COMMUNICATION DISORDERS 2012; 47:156-165. [PMID: 22369056 DOI: 10.1111/j.1460-6984.2011.00087.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND The assessment of adequate upper oesophageal sphincter (UOS) opening during swallowing is an integral component of dysphagia evaluation. AIMS To ascertain speech and language therapists' (SLTs) satisfaction with current methods for assessing UOS function in people with dysphagia and to identify challenges encountered by SLTs with UOS evaluation. METHODS & PROCEDURES A survey was disseminated to 82 SLT managers in Ireland; to two dysphagia Special Interest Groups in the UK; and to the Royal College of Speech & Language Therapists'Bulletin periodical. A survey link was also posted on the American Speech and Hearing Association (ASHA) Division 13 (Dysphagia) web forum. OUTCOMES & RESULTS Surveys from 224 SLTs with active dysphagia caseloads were included in data analysis. Only 17.9% (40/224) of SLTs were satisfied with the accuracy and reliability of UOS evaluations currently being employed in dysphagia practice. Satisfaction with current UOS evaluation was not associated with the level of clinical experience (r= 0.078; p= 0.246). Eighty-seven per cent (195/224) of SLTs working with dysphagia experience challenges in UOS evaluation. Challenges reported include lack of resources/equipment (55.9%), limited quantitative information (45.6%), lack of training (41%) and knowledge (39%) in UOS function, and limited multidisciplinary team involvement (34%). CONCLUSIONS & IMPLICATIONS SLTs across all levels of clinical experience are not satisfied with current UOS evaluation in dysphagia practice. Based on the specific challenges identified, recommendations to progress SLT evaluation of UOS function in people with dysphagia are proposed.
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Affiliation(s)
- Julie Regan
- SLT Department, Adelaide and Meath Hospital, AMNCH, Tallaght, Dublin, Ireland.
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Abstract
This article reviews the embryology and general anatomy of the esophagus, including the topography and relationships of the esophagus to surrounding structures. The esophagus is the only internal organ that traverses 3 body cavities, and a complete understanding of the anatomy and anatomic relationships of the esophagus in each area is essential for surgeons who address esophageal disorders. Details regarding the normal histology and basic function of the esophagus are also provided.
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Affiliation(s)
- Arzu Oezcelik
- Department of Surgery, Keck School of Medicine, University of Southern California, 1510 San Pablo Street, Los Angeles, CA 90033, USA
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Tsubouchi T, Tsujimoto S, Sugimoto S, Katsura Y, Mino T, Seki T. Swallowing disorder and inhibition of cough reflex induced by atropine sulfate in conscious dogs. J Pharmacol Sci 2008; 106:452-9. [PMID: 18344613 DOI: 10.1254/jphs.fp0071553] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
In this study, the effects of atropine sulfate (atropine) on swallowing and cough reflex were evaluated in the two experimental models in conscious dogs. To evaluate the effects of atropine on swallowing, 1 mL of marker (contrast medium) was injected into the pharynx under X-ray exposure to induce swallowing. Baclofen, used as a positive control, caused marker congestion in the upper esophagus. In our experimental model, atropine (0.02 and 0.1 mg/kg, i.v.) dose-dependently increased not only the number of marker congestions but also that of the swallows. In addition, atropine significantly shortened the onset of first swallowing. In the evaluation of atropine effects on electrically evoked cough reflex induced by two electrodes implanted into the trachea, atropine strongly inhibited the number of coughs at 0.01 or 0.05 mg/kg accompanied with 0.01 or 0.05 mg/kg per hour (i.v.), respectively. These findings indicate that atropine has the potential of causing aspiration pneumonia through induction of swallowing disorder and inhibition of the cough reflex.
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Affiliation(s)
- Tadashi Tsubouchi
- Safety Research Laboratories, Dainippon Sumitomo Pharma Co., Ltd., Japan.
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Jadcherla SR, Gupta A, Stoner E, Fernandez S, Shaker R. Pharyngeal swallowing: defining pharyngeal and upper esophageal sphincter relationships in human neonates. J Pediatr 2007; 151:597-603. [PMID: 18035137 PMCID: PMC2211414 DOI: 10.1016/j.jpeds.2007.04.042] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2006] [Revised: 04/05/2007] [Accepted: 04/19/2007] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To test the hypothesis that the sensorimotor characteristics of the reflexes evoked on stimulation with air and water infusions differ by studying the effect of pharyngeal stimulation on pharyngeal-upper esophageal sphincter (UES) interactions in healthy neonates. STUDY DESIGN Pharyngo-UES-esophageal manometry was recorded in 10 neonates at 39 +/- 4 weeks postmenstrual age. Pharyngeal infusions (n = 155) of air (0.1 to 2.0 mL) and sterile water (0.1 to 0.5 mL) were given. Two types of reflexes were recognized: pharyngeal reflexive swallowing (PRS) and pharyngo-UES-contractile reflex (PUCR). Frequency occurrence, distribution of reflexes, threshold volume, response time, and stimulus-response relationship were evaluated. RESULTS The reflex response rates were 30% for air and 76% for water (P < .001). PRS was more frequent than PUCR with air and water (P < .05), even though the stimulation thresholds and response latencies were similar. Graded volumes of water but not air resulted in an increased frequency of PRS (P < .01). CONCLUSIONS PRS is more frequent than PUCR, and the 2 reflexes have distinctive characteristics in air and water stimuli. Both PRS and PUCR have implications for the evaluation of swallowing in infants.
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Affiliation(s)
- Sudarshan Rao Jadcherla
- Section of Neonatology, Columbus Children's Hospital and Department of Pediatrics, Ohio State University College of Medicine and Public Health, Columbus, OH 43205, USA.
| | - Alankar Gupta
- Section of Neonatology, Columbus Children’s Hospital, 700 Children’s Drive, Columbus, OH 43205
| | - Erin Stoner
- Section of Neonatology, Columbus Children’s Hospital, 700 Children’s Drive, Columbus, OH 43205
| | - Soledad Fernandez
- Center for Biostatistics at The Ohio State University College of Medicine and Public Health, Columbus Children’s Research Institute, 700 Children’s Drive, Columbus, OH 43205
| | - Reza Shaker
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, and Dysphagia Institute, Medical College of Wisconsin, 8701 Watertown Plank Rd, Milwaukee, WI 53226
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Neuhuber WL, Raab M, Berthoud HR, Wörl J. Innervation of the mammalian esophagus. ADVANCES IN ANATOMY EMBRYOLOGY AND CELL BIOLOGY 2006. [PMID: 16573241 DOI: 10.1007/978-3-540-32948-0_1] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Understanding the innervation of the esophagus is a prerequisite for successful treatment of a variety of disorders, e.g., dysphagia, achalasia, gastroesophageal reflux disease (GERD) and non-cardiac chest pain. Although, at first glance, functions of the esophagus are relatively simple, their neuronal control is considerably complex. Vagal motor neurons of the nucleus ambiguus and preganglionic neurons of the dorsal motor nucleus innervate striated and smooth muscle, respectively. Myenteric neurons represent the interface between the dorsal motor nucleus and smooth muscle but they are also involved in striated muscle innervation. Intraganglionic laminar endings (IGLEs) represent mechanosensory vagal afferent terminals. They also establish intricate connections with enteric neurons. Afferent information is implemented by the swallowing central pattern generator in the brainstem, which generates and coordinates deglutitive activity in both striated and smooth esophageal muscle and orchestrates esophageal sphincters as well as gastric adaptive relaxation. Disturbed excitation/inhibition balance in the lower esophageal sphincter results in motility disorders, e.g., achalasia and GERD. Loss of mechanosensory afferents disrupts adaptation of deglutitive motor programs to bolus variables, eventually leading to megaesophagus. Both spinal and vagal afferents appear to contribute to painful sensations, e.g., non-cardiac chest pain. Extrinsic and intrinsic neurons may be involved in intramural reflexes using acetylcholine, nitric oxide, substance P, CGRP and glutamate as main transmitters. In addition, other molecules, e.g., ATP, GABA and probably also inflammatory cytokines, may modulate these neuronal functions.
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Affiliation(s)
- Jeri A Logemann
- Department of Communication Sciences and Disorders, Northwestern University, Frances Searle Bldg., 2240 Campus Dr., #3-358, Evanston, Illinois 60208-3570, USA.
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Kawamura O, Easterling C, Rittmann T, Hofmann C, Shaker R. Optimal stimulus intensity and reliability of air stimulation technique for elicitation of laryngo-upper esophageal sphincter contractile reflex. Ann Otol Rhinol Laryngol 2005; 114:223-8. [PMID: 15825573 DOI: 10.1177/000348940511400310] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
To determine the optimal air stimulus intensity and duration for elicitation of the laryngo-upper esophageal sphincter (UES) contractile reflex, we studied 37 healthy volunteers 20 to 81 years of age. A sleeve device monitored the UES pressure. For laryngeal stimulation, we used an air stimulator unit (Pentax AP-4000) that incorporated a nasolaryngeal endoscope. The arytenoids and interarytenoid areas were stimulated at least three times by three different stimuli: 6-mm Hg air pulse with 50-ms duration, 10-mm Hg air pulse with 50-ms duration, and 6-mm Hg air pulse with 2-second duration. Of 1,165 air stimulations, 1,041 resulted in mucosal deflections. Of these, 451 resulted in an abrupt increase in UES pressure. The response/deflection ratio for 6-mm Hg stimulation with 2-second duration was significantly higher than those for air pulses with 50-ms duration (p < .001). We conclude that although the laryngo-UES contractile reflex can be elicited by an air pulse with 50-ms duration, this ultrashort stimulation is not reliable. Using longer-duration pulses (at least 2 seconds) improves the reliability of elicitation of the laryngo-UES contractile reflex.
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Affiliation(s)
- Osamu Kawamura
- Medical College of Wisconsin Dysphagia Institute, Division of Gastroenterology and Hepatology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
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Wörl J, Neuhuber WL. Enteric co-innervation of motor endplates in the esophagus: state of the art ten years after. Histochem Cell Biol 2005; 123:117-30. [PMID: 15729553 DOI: 10.1007/s00418-005-0764-7] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/15/2004] [Indexed: 01/26/2023]
Abstract
The existence of a distinct ganglionated myenteric plexus between the two layers of the striated tunica muscularis of the mammalian esophagus represented an enigma for quite a while. Although an enteric co-innervation of vagally innervated motor endplates in the esophagus has been repeatedly suggested, it was not possible until recently to demonstrate this dual innervation. Ten years ago, we were able to demonstrate that motor endplates in the rat esophagus receive a dual innervation from both vagal nerve fibers originating in the brain stem and from varicose enteric nerve fibers originating in the myenteric plexus. Since then, a considerable amount of data could be raised on enteric co-innervation and its occurrence in a variety of species, including humans, its neurochemistry, spatial relationships on motor endplates, ontogeny, and possible roles during esophageal peristalsis. These data underline the significance of this newly discovered innervation component, although its function is still largely unknown. The aim of this review is to summarize current knowledge about enteric co-innervation of esophageal striated muscle and to provide some hints as to its functional significance.
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Affiliation(s)
- Jürgen Wörl
- Anatomy Institute, University of Erlangen-Nuremberg, Krankenhausstrasse 9, D-91054, Erlangen, Germany.
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Wang AY, Kadkade R, Kahrilas PJ, Hirano I. Effectiveness of esophageal dilation for symptomatic cricopharyngeal bar. Gastrointest Endosc 2005; 61:148-52. [PMID: 15672078 DOI: 10.1016/s0016-5107(04)02447-2] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND The cricopharyngeal (CP) bar is an uncommon but important cause of oropharyngeal dysphagia (OPD). Treatment options include CP myotomy, which can be problematic, because CP bars primarily occur in elderly patients who are at higher risk for perioperative complications. The effectiveness of esophageal dilation for patients with symptoms caused by a CP bar is not well studied. METHODS A review of medical records (1999 to 2002) identified 32 patients with CP bar. Six of these patients who had OPD that could only be attributed to a CP bar underwent EGD and dilation with either over-the-guidewire polyvinyl dilators (5) or a balloon (1). OBSERVATIONS All 6 patients experienced immediate relief of dysphagia. Five had continued improvement at short-term follow-up (1 to 4 weeks). Three patients still had complete resolution of dysphagia at long-term follow-up (range 8 to 27 months). CONCLUSIONS CP bar is an important cause of dysphagia in elderly patients. Esophageal dilation of a CP bar can produce long-term relief of dysphagia.
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Affiliation(s)
- Andrew Y Wang
- Divison of Gastroenterology, Department of Medicine, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611-3008, USA
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Kawamura O, Easterling C, Aslam M, Rittmann T, Hofmann C, Shaker R. Laryngo-upper esophageal sphincter contractile reflex in humans deteriorates with age. Gastroenterology 2004; 127:57-64. [PMID: 15236172 DOI: 10.1053/j.gastro.2004.03.065] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
BACKGROUND & AIMS Recent studies have shown the existence of several reflex connections between the aerodigestive and upper gastrointestinal tracts. Our aim was to study the effect of laryngeal stimulation on upper esophageal sphincter (UES) pressure and to determine the reproducibility of this effect. METHODS We studied 14 young and 10 elderly healthy nonsmoker volunteers and 7 patients with UES dysphagia using a concurrent manometric and video endoscopic technique. Three levels of laryngeal air stimulation were studied: 6 mm Hg/50 ms, 10 mm Hg/50 ms, and 6 mm Hg/2 s. Ten young subjects were studied twice. RESULTS For 6-mm Hg/2-s and 6-mm Hg/50-ms duration stimuli, the frequency of UES response to air stimulation as evidenced by mucosal deflection (response/deflection ratio) in the elderly volunteers was significantly lower compared with that of young subjects (P < 0.05). The response/deflection ratio of the 6-mm Hg/2-s stimulus was significantly higher than those induced by stimuli of shorter duration (P < 0.01). Poststimulation UES pressure was significantly higher than prestimulation pressure (P < 0.05) in both groups. The magnitude of the increase in poststimulation UES pressure in the elderly volunteers was similar to that of the young subjects. Findings were similar in repeated studies. Four of 7 dysphagic patients exhibited an abnormal response. CONCLUSIONS Afferent signals originating from the larynx reproducibly induce contraction of the UES: the laryngo-UES contractile reflex. This reflex is elicited most reliably by 6-mm Hg/2-s air stimulation. Frequency elicitation of this reflex decreases significantly with age while the magnitude of change in UES pressure remains unchanged, indicating a deleterious effect of aging on the afferent arm of this reflex. This reflex is altered in some dysphagic patients.
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Affiliation(s)
- Osamu Kawamura
- Medical College of Wisconsin Dysphagia Institute, Division of Gastroenterology and Hepatology, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
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