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numericals associated with the kidneys.

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medmaestro's version from 2015-10-13 04:20

Section

Question Answer
Weight of each kidney150 gm each.(Both kidneys together make up 0.5 % of total body weight)
% of cardiac output received by eack kidney12.5 % (25% combined)
% of the total renal blood flow which goes to the renal cortex90 %
Each glomerulus contains20 – 40 capillary loops
Diameter of the fenestra of endothelial cells at glomerulus70 – 100 nm
Width of filtration slits20 – 30 nm
Approx number of minor calyces in each kidney12
No. of nephrons in each kidney1 – 1.3 million
Approx. nephron length45 – 65 mm
Approx PCT length15 mm
Approx. DCT length5 mm
Approx. CD length20 mm
% of nephrons that are juxtamedullary15 %
Total filtration area of capillary endothelium0.8 square meters
Normal GFR125 ml/min, 7.5 L/hr, 180L/day
Effective RPF625 ml/min
Actual RPF700 ml/min
Net filtration pressure15 mm Hg
Filtration fraction GFR/RPF0.16 – 0.20
Microalbuminuria30 – 300 mg/d
Nephritogenic strains of Grp A beta haemolytic streptococci12 , 4 , 1 .
memorize
Normal urine output
Question Answer
Infants2 ml/kg/hr
Children1 ml /kg/hr
Adults0.5 ml/kg/hr
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Proteinuria
Question Answer
Mild – moderate100 – 1000mg.sq.metre/day
Heavy (nephrotic range)> 1000mg.sq.metre/day
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