As a part of space-research program, a physiologist was asked to investigate the effect of flight-induced stress on blood pressure. Accordingly the blood pressure of the cosmonauts was to be measured twice: Once before the takeoff and once after the spacecraft entered the designated orbit around the earth. For a proper comparison, the preflight blood pressure should be recorded in:
Ans. (a) The lying down position(Ref: Guyton, 13th ed/p.566)Gravity factor is totally eliminated in spaceSo, for comparison preflight BP should be taken in the lying down position
The lying down position
The sitting position
The standing position
Any position, as long as the post - flight recording is made in the same position
Circulation: Arterial Pressure Regulation - Role of Kidney