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Titolo:
Effects of external nasal support on pulmonary gas exchange and EIPH in the horse
Autore:
Poole, DC; Kindig, CA; Fenton, G; Ferguson, L; Rush, BR; Erickson, HH;
Indirizzi:
Kansas State Univ, Dept Anat & Physiol, Manhattan, KS 66506 USA Kansas State Univ Manhattan KS USA 66506 Physiol, Manhattan, KS 66506 USA Kansas State Univ, Dept Kinesiol, Manhattan, KS 66506 USA Kansas State Univ Manhattan KS USA 66506 inesiol, Manhattan, KS 66506 USA Kansas State Univ, Dept Clin Sci, Manhattan, KS 66506 USA Kansas State Univ Manhattan KS USA 66506 lin Sci, Manhattan, KS 66506 USA CNS Inc, Minneapolis, MN 55439 USA CNS Inc Minneapolis MN USA 55439CNS Inc, Minneapolis, MN 55439 USA
Titolo Testata:
JOURNAL OF EQUINE VETERINARY SCIENCE
fascicolo: 9, volume: 20, anno: 2000,
pagine: 579 - 585
SICI:
0737-0806(200009)20:9<579:EOENSO>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
RESPIRATORY MUSCLE WORK; THOROUGHBRED RACEHORSES; BRONCHOALVEOLAR LAVAGE; MAXIMAL EXERCISE; BLOOD-FLOW; HEMORRHAGE; PRESSURES; FAILURE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Erickson, HH Kansas State Univ, Dept Anat & Physiol, Manhattan, KS 66506 USA Kansas State Univ Manhattan KS USA 66506 attan, KS 66506 USA
Citazione:
D.C. Poole et al., "Effects of external nasal support on pulmonary gas exchange and EIPH in the horse", J EQUINE V, 20(9), 2000, pp. 579-585

Abstract

In the horse during high-speed running, partial collapse of the unsupported nasal airways may contribute to elevated inspiratory resistance. This effect would be expected to increase respiratory muscle work and augment negative intrapulmonary pressure swings which in turn might exacerbate exercise-induced pulmonary hemorrhage (EIPH). To investigate this issue, six Thoroughbreds and one Quarter Horse were evaluated while running at high speed (12/-1 m/s) under control conditions (C) and wearing an external nasal dilator (ND) in individual, randomly ordered trials two weeks apart, Whole-body gas exchange (oxygen uptake, (V) over dot O-2, carbon dioxide output, (V) over dot CO2), arterial blood gases, acid-base and blood temperature were measured. Compared with C, ND significantly reduced (V) over dot O-2 (C, 59.9+/-5.3; ND, 56.4+/-5.0 L/min, P < 0.05) and (V) over dot CO2 However, neither arterial blood gases, acid-base, blood temperature nor plasma lactate were changed significantly. Bronchoalveolar lavage (BAL) revealed a 33% (P < 0.05) reduction in EIPH (quantified as red blood cells/ml BAL fluid) in the ND trial, These data demonstrate that nasal dilation can lower whole body (V) over dot O-2, and reduce EIPH. It is possible that these effects are secondary to a decreased inspiratory resistance, lowered inspiratory muscle work and altered intrapulmonary pressures.

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Documento generato il 05/04/20 alle ore 12:42:34