Degtiarev V A, Doroshev V G, Batenchuk-Tusko T V, Kirillova Z A, Lapshina N A
Kosm Biol Aviakosm Med. 1977 May-Jun;11(3):26-31.
Orthostatic tolerance of the Salyut-4 crewmembers was measured by means of LBNP tests (--25 mm Hg for 2 min and --35 mm Hg for subsequent 3 min). Orthostatic tolerance decreased, remaining, however, satisfactory throughout the 2-month flight. During LBNP tests the pattern of most cardiovascular changes inflight and on the earth was similar. In weightlessness heart rate increased reaching maximum preflight values; cardiac output and stroke volume decreased noticeably; the systolic time interval changed significantly. The recommended regimen of LBNP did not deteriorate the health state of the crewmembers and was adequate to predict their orthostatic tolerance. Criteria for the evaluation of the health condition of space crewmembers were developed.
通过下体负压试验（-25毫米汞柱持续2分钟，随后-35毫米汞柱持续3分钟）测量了礼炮4号机组人员的立位耐力。立位耐力有所下降，但在整个2个月的飞行期间仍令人满意。在下体负压试验期间，飞行中及在地球上大多数心血管变化的模式相似。在失重状态下，心率增加，达到飞行前的最大值；心输出量和每搏输出量显著下降；收缩期时间间期发生显著变化。推荐的下体负压试验方案并未使机组人员的健康状况恶化，并且足以预测他们的立位耐力。制定了评估航天机组人员健康状况的标准。
