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Titolo:
Extravascular lung water in the exercising horse
Autore:
Wilkins, PA; Gleed, RD; Krivitski, NM; Dobson, A;
Indirizzi:
Cornell Univ, Coll Vet Med, Dept Clin Sci, Ithaca, NY 14853 USA Cornell Univ Ithaca NY USA 14853 Med, Dept Clin Sci, Ithaca, NY 14853 USA Cornell Univ, Coll Vet Med, Dept Physiol, Ithaca, NY 14853 USA Cornell Univ Ithaca NY USA 14853 Med, Dept Physiol, Ithaca, NY 14853 USA Transon Syst Inc, Ithaca, NY 14850 USA Transon Syst Inc Ithaca NY USA 14850 anson Syst Inc, Ithaca, NY 14850 USA
Titolo Testata:
JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 6, volume: 91, anno: 2001,
pagine: 2442 - 2450
SICI:
8750-7587(200112)91:6<2442:ELWITE>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
INDUCED ARTERIAL HYPOXEMIA; BLOOD-FLOW DISTRIBUTION; INDICATOR DILUTION; TREADMILL EXERCISE; STRESS FAILURE; SEA-LEVEL; PULMONARY; VOLUME; RACEHORSES; ANESTHESIA;
Keywords:
central blood volume; actively circulating blood volume; double-indicator dilution; blood impedance; temperature;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
45
Recensione:
Indirizzi per estratti:
Indirizzo: Gleed, RD Cornell Univ, Coll Vet Med, Dept Clin Sci, Ithaca, NY 14853 USA Cornell Univ Ithaca NY USA 14853 Clin Sci, Ithaca, NY 14853 USA
Citazione:
P.A. Wilkins et al., "Extravascular lung water in the exercising horse", J APP PHYSL, 91(6), 2001, pp. 2442-2450

Abstract

Seven standardbred horses were exercised on a treadmill at speeds (similarto 12 m/s) producing maximal heart rate, hypoxemia, and a mean pulmonary arterial pressure of similar to 75 mmHg. Extravascular lung water was measured by using transients in temperature and electrical impedance of the bloodcaused by a bolus injection of cold saline solution. Lung water was similar to3 ml/kg body wt when standing but did not increase significantly with exertion. We conclude that any increase in fluid extravasation from the pulmonary hypertension accumulates in the lung at a level that is less than that detectable by this method. At maximal exertion, the volume of blood measured between the jugular vein and the carotid artery increased by similar to8 ml/kg, and the actively circulating component of the systemic blood volume increased by similar to 17 ml/kg with respect to corresponding values obtained when walking before exertion. These volume increases, reflecting recruitment and dilatation of capillaries, increase the area for respiratory gas exchange and offset the reduced transit times that would otherwise be imposed by the approximately eightfold increase in cardiac output at maximal exertion.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/21 alle ore 12:50:50