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NBME 16 Answers

nbme16/Block 1/Question#17 (7.2 difficulty score)
An investigator is studying the regulation of ...
Intravenous infusion of 0.9% saline for 5 minutes🔍
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IV normal saline will increase hydrostatic pressure in the vasculature. This isotonic solution is freely filtered across the capillaries, which is collected by lymphatics and can be picked up in this experiment.

motherhen  Why does albumin solution not have this effect? +2  
notyasupreme  I think it's because albumin in saline is hypertonic, which would cause the opposite effect of what the experiment was going for. Fluid would go across the capillaries into the vasculature, rather than vice versa. +