Document Detail


Failure of subtotal arytenoidectomy to improve upper airway flow mechanics in exercising standardbreds with induced laryngeal hemiplegia.
MedLine Citation:
PMID:  2396798     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Upper airway flow mechanics and arterial blood gas measurements were used to assess the efficacy of subtotal arytenoidectomy for treatment of induced left laryngeal hemiplegia in horses. Measurements were collected with the horses at rest, and trotting or pacing on a treadmill (6.38 degrees incline) at speeds of 4.2 and 7.0 m/s. Experimental protocols were performed after right common carotid artery exteriorization (baseline), after left recurrent laryngeal neurectomy (LRLN), and after left subtotal arytenoidectomy. At baseline, increasing treadmill speed progressively increased peak inspiratory and expiratory flow (VImax and VEmax, respectively), peak inspiratory and expiratory transupper airway pressure (PuI and PuE, respectively), respiratory frequency (f), tidal volume (VT), minute volume (VE), and heart rate. Inspiratory and expiratory times (TI and TE, respectively) and arterial oxygen tension (PaO2) decreased with increased treadmill speed; inspiratory and expiratory impedance (ZI and ZE, respectively) did not change. After LRLN, VImax, f, and PaO2 significantly (P less than 0.05) decreased at exercise, whereas PuI, TI, and ZI significantly increased. Minute volume decreased at exercise after LRLN, but the changes were not significant; LRLN had no effect on VEmax, PuE, ZE, heart rate, arterial carbon dioxide tension (PaCO2), or VT. Subtotal arytenoidectomy did not improve upper airway flow mechanics or blood gas measurements impaired by laryngeal hemiplegia.
Authors:
J K Belknap; F J Derksen; F A Nickels; J A Stick; N E Robinson
Related Documents :
22736248 - A simple method to clamp end-tidal carbon dioxide during rest and exercise.
2513668 - Neural factors in acute emetic, cardiovascular, and respiratory effects of t-2 toxin in...
1658898 - The effects of inversed ratio ventilation (irv) on arterial oxygenation during mechanic...
6823868 - Electrophysiologic mechanism of exercise-induced sustained ventricular tachycardia.
20495858 - Understanding exercise self-efficacy and barriers to leisure-time physical activity amo...
12391108 - Effects of mode of exercise recovery on thermoregulatory and cardiovascular responses.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of veterinary research     Volume:  51     ISSN:  0002-9645     ISO Abbreviation:  Am. J. Vet. Res.     Publication Date:  1990 Sep 
Date Detail:
Created Date:  1990-10-11     Completed Date:  1990-10-11     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0375011     Medline TA:  Am J Vet Res     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1481-7     Citation Subset:  IM    
Affiliation:
Department of Large Animal Clinical Sciences, Michigan State University, East Lansing 48824-1214.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Animals
Arytenoid Cartilage / surgery*
Hemiplegia / etiology,  surgery,  veterinary*
Horse Diseases / etiology,  surgery*
Horses
Laryngeal Cartilages / surgery*
Laryngeal Diseases / etiology,  surgery,  veterinary*
Physical Exertion
Pulmonary Ventilation*
Respiratory Mechanics*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  Histologic and immunochemical study of the pathogenesis of heartwater (Cowdria ruminantium infection...
Next Document:  Effect of antimicrobial solution lavage on the palmar digital tendon sheath in horses.