208 



PHYSIOLOGY OF INDUCED HYPOTHERMIA 



Fig. 8. — Gross changes observed in the kidneys removed from a dug three days after the 

 aorta and the renal artery to the left kidney were occluded for a period of two hours under 

 normothermic conditions. 



Left 



Fig. 9. — Another animal treated as in figure 8. 



sodium excretion but there is a depression in potassium excretion. These responses 

 are just as marked immediately after reduction in temperature as they are after 

 hypothermia for two hours or more. Raising the blood pressure to control levels 

 during hypothermia does not improve glomerular filtration rate or renal blood flow, 

 indicating that the depression in renal hemodynamics is a response to hypothermia 

 rather than being secondary to the reduction in blood pressure. 



Observations have been made on the effect of renal ischemia produced by three 



