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Effect of pressure suit inflation on pulmonary capillary blood volume


, : Effect of pressure suit inflation on pulmonary capillary blood volume. Journal of Applied Physiology 16: 674-678

Compression of the lower part of the body by an aviator's G suit produces acute pulmonary vascular engorgement and increases pulmonary vascular pressure. In previous studies, pulmonary diffusing capacity for carbon monoxide (DL) was increased by this procedure, presumably due to increase in the pulmonary capillary blood volume (Vc), and apparently indicating that the pulmonary capillary bed can be passively dilated by increased intravascular pressure. In the present study, the effect of G-suit inflation on DL was again studied in 12 normal subjects, but also with determinations of DL at different alveolar O2 tensions so that Vc and the true pulmonary membrane diffusing capacity (DM) could be calculated. Studies were made in each subject with the suit on, uninflated and then inflated. With suit inflation, DL was increased in all 12 subjects (27%), Vc was increased in 11 subjects (33%), and DM was increased in 10 subjects (21%). These studies show that the pulmonary capillary bed can be passively dilated by increased intravascular pressure, but it is not possible to distinguish between the two possible mechanisms, dilatation of open capillaries or opening of previously closed ones.

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PMID: 13743621


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Zeng, X.; Chen, X.; Peng, Y.; Xu, C.; Men, Q., 2012: Contributions of edentulous mandibular alveolar ridge height and denture adhesive to complete denture retention. The present paper is to investigate the relationship between height and stress-bearing area of mandibular alveolar ridge, their influence on retention of complete denture, and the effectiveness of denture adhesive (DA). Five mandibular edentulous...

Shah, P.J.R.; Farren, R., 1981: Dietary calcium intake and idiopathic hypercalciuria. The mean ( plus or minus s.d.) 24-h excretion of calcium in urine of 71 patients with a history of urolithiasis and idiopathic hypercalciuria was 10.8 plus or minus 1.9 mmol compared with 4.9 plus or minus 1.9 mmol in 30 age- and sex-matched norma...

Martynenko, Ii, 1981: Automatic control of the microclimate in farm production buildings. Nauchno tekhnicheskii progress v mekhanizatsii elektrifikatsii i avtomatizatsii sel'skokhoziaistvennogo proizvodstva red kollegiia sbornika: PP Vavilov: 133

Bradley; Gelsen, 1991: Comment on "Observation of the photorefractive effect in a polymer". Physical Review Letters 67(18): 2589-2589

Eichlseder, W., 1977: Tonsillectomy in childhood from immunological standpoint. Anasthesiologische und Intensivmedizinische Praxis 13(1): 130-132

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