title: [Hypovolemic reactions of man and animals to exposure to +GZ load factors of increasing intensity].
abstract: Maximal variations of the circulating blood and plasma volumes after water load and/or exposure to increasing +GZ were investigated in manned and animal studies. The animal study demonstrated that the relative changes in the circulating blood and plasma volumes can be calculated using hematocrit or hemoglobin values. On the 2nd minute after exposure to increasing +GZ of up to 14.5 G the animals showed a decrease (by 11.7%) of the circulating blood volume which was primarily associated with plasma losses. The change was not appreciably modified by the use of an anti-G suit. In the manned studies the decrease was 5.9% during exposure to 7 G and 11% during exposure to 9 G with an anti-G suit used. These observations show that the acceleration duration and value play an important part in the mechanism of plasma filtration in response to an increase in the hydrostatic pressure.
mesh_terms: D000328:Adult; D000818:Animals; D001810:Blood Volume; D004285:Dogs; D004911:Erythrocyte Volume; D006112:Gravitation; D006400:Hematocrit; D006454:Hemoglobins / Q000032:analysis; D006801:Humans; D006874:Hydrostatic Pressure; D008297:Male; D010953:Plasma Volume
chemical_list: D006454:Hemoglobins
vernacular_title: Gipovolemicheskie reaktsii cheloveka i zhivotnykh pri vozdeĭstvii peregruzok +GZ narastaiushcheĭ intensivnosti.