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THE BLOOD VOLUME OF FETUSES CARRIED BY EWES AT HIGH ALTITUDE
Author(s) -
Prystowsky Harry,
Hellegers André,
Meschia Giacomo,
Metcalfe James,
Huckabee William,
Barron Donald H.
Publication year - 1960
Publication title -
quarterly journal of experimental physiology and cognate medical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.925
H-Index - 101
eISSN - 1469-445X
pISSN - 0033-5541
DOI - 10.1113/expphysiol.1960.sp001474
Subject(s) - fetus , hematocrit , placenta , blood volume , plasma volume , altitude (triangle) , biology , effects of high altitude on humans , fetal weight , hemoconcentration , medicine , physiology , endocrinology , zoology , pregnancy , anatomy , mathematics , genetics , geometry
Estimates of the circulating plasma volume (fetus and placenta) and the hematocrit were made on the fetuses of ten ewes indigenous to the high Andean pastures at about 14,000 ft. The results when compared with data on fetuses of ewes at sea level indicate: (1) that the plasma volume expressed as per cent of fetal weight is not regularly increased above the values recorded at sea level; (2) with but one exception the hematocrits of the fetuses of the ewes at altitude were higher than the levels reported for sea level; (3) as a result of the larger hematocrit the blood volume circulating through the fetus and placenta is higher in proportion to the fetal weight than it is in the fetuses of comparable size and age carried by ewes at sea level.