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Kaplan Qbank USMLE



Author7 Posts
  #1

Can anybody add points to this list.

factors increasing GFR :

*increase renal blood flow
*decrease sympathetic activity
*efferent arteriole constriction
*afferent arteriole dilation
*dcrease in plasma oncotic pressure

Factors decreasing GFR :

*Complete urethral obstruction.
*large drop in B.P.
* vasoconstriction of afferent arterioles
*increased sympathetic activity

  #2

these are the points I have too.
Just thought of one condition... in shock the Prostaglandins are keeping the afferent arteriole dilated, so we should not give Aspirin and NSAIDS.

  #3

thanks meg

  #4

yes all these pts plus increased angiotensin 2 secretion which causes more efferent vasoconstriction than afferent thereby increasing gfr , decreasing rbf and increasing the filtration fraction.thanx for that pt about shock meg

  #5

Thanks dr sid

  #6

GFR decreases with age

  #7

as well increased plasma proteins decreases GFR







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