| Effect of head and neck position on intrathoracic pressure and arterial blood gas values in Dutch Warmblood riding horses during moderate exercise. | |
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MedLine Citation:
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PMID: 22452499 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Objective-To evaluate the effect of various head and neck positions on intrathoracic pressure and arterial oxygenation during exercise in horses. Animals-7 healthy Dutch Warmblood riding horses. Procedures-The horses were evaluated with the head and neck in the following predefined positions: position 1, free and unrestrained; position 2, neck raised with the bridge of the nose aligned vertically; position 4, neck lowered and extremely flexed with the nose pointing toward the pectoral muscles; position 5, neck raised and extended with the bridge of the nose in front of a vertical line perpendicular to the ground surface; and position 7, neck lowered and flexed with the nose pointing towards the carpus. The standard exercise protocol consisted of trotting for 10 minutes, cantering for 4 minutes, trotting again for 5 minutes, and walking for 5 minutes. An esophageal balloon catheter was used to indirectly measure intrathoracic pressure. Arterial blood samples were obtained for measurement of Pao(2), Paco(2), and arterial oxygen saturation. Results-Compared with when horses were in the unrestrained position, inspiratory intrathoracic pressure became more negative during the first trot (all positions), canter and second trot (position 4), and walk (positions 4 and 5). Compared with when horses were in position 1, intrathoracic pressure difference increased in positions 4, 2, 7, and 5; Pao(2) increased in position 5; and arterial oxygen saturation increased in positions 4 and 7. Conclusions and Clinical Relevance-Position 4 was particularly influential on intrathoracic pressure during exercise in horses. The effects detected may have been caused by a dynamic upper airway obstruction and may be more profound in horses with upper airway disease. |
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Authors:
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Janneke Sleutjens; Esmee Smiet; René van Weeren; Johannes van der Kolk; Willem Back; Inge D Wijnberg |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: American journal of veterinary research Volume: 73 ISSN: 1943-5681 ISO Abbreviation: Am. J. Vet. Res. Publication Date: 2012 Apr |
Date Detail:
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Created Date: 2012-03-28 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0375011 Medline TA: Am J Vet Res Country: United States |
Other Details:
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Languages: eng Pagination: 522-8 Citation Subset: IM |
Affiliation:
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Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, NL-3584 CM, The Netherlands. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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