Question

Explain the compensatory mechanisms operatory during shock.

Answer 1

Shock is defined as inability of circulatory system to provide adequate oxygen and nutrients to meet the metabolic demands of vital organs ,clinically recognised by inadequate perfusion .
Compensated shock is clinical state where systolic Blood pressure is maintained within normal range with signs of inadequate tissue perfusion beng present .
Compensatory mechanism:
1.Hyperventilation -During shock because of decrease in tissue perfusion leads to decrease in oxygen supply (Hypoxia) and leading to lactic acid fermenation and Lactic acidosis in order to get rid of acidosis pateint will hyperventilate to wash excess of Carbondioxide .

2.Vasoconstriction - Decreased perfusion leads to hypotension and activation of baroreceotors in arteries which leads to release of adrenaline and noradrnaline leading to vasoconstriction and increase in heart rate ultimately increasing the Blood pressure .

3.Renin Angiotension aldosterone( RAAS) activation : Inadequate perfusion leads To
activation of RAAS and cause relase of ADH ( antidiuretic hormone ) .RAAS through aldosterone cause sodium and water retention and ADH cause concentrated urine and decreased urine output .But Kidneys play role in later stages of shock these are compensatory mechanism operated during shock .