A driver who got a trauma in a road accident and is shocked has reduction of daily urinary output down to 300 ml. What is the main pathogenetic factor of such diuresis change?

Answer options

1. Decreased number of functioning glomerules
2. Drop of oncotic blood pressure
3. Drop of arterial pressure
4. Increased vascular permeability
5. Secondary hyperaldosteronism

Explanation

The cause of shock is usually due to decreased cardiac output which may be caused by heart failure or too little venous return. This could be due to reduced blood volume. In a road accident, more blood is lost leading to a reduction in blood volume (a drop of arterial pressure).