Renal system


Vasocontriction of the renal arteries with a decrease ( GFR); do the body lose sodium or gain it .... I was thinking that the body will gain it due to the vascontriction?

Daytonite, BSN, RN

4 Articles; 14,603 Posts

Specializes in med/surg, telemetry, IV therapy, mgmt. Has 40 years experience.

the nephron is the filtering unit of the kidney where urine is made. each nephron consists of

think of the nephron as a big factory with an assembly line coming into it (the renal artery). what the factory workers (nephrons) at the separating room (glomerulus) do is separate the blood cells from the serum of the blood and send the serum (filtrate) on for processing (renal tubule) where it is acted upon by an eager cells looking to retrieve back some of what they lost (fluids and electrolytes) at the separating room (peritubular capillaries) so they can continue on their way out the back door of the factory and get the heck out of dodge (the renal vein)!

if vasoconstriction is going on, not as much blood flows into the kidneys; if vasodilation is going on, a lot more blood flows to the kidneys. sodium is the most plentiful electrolyte in the body. sodium and water exist together. whatever is happening to sodium (loss or gain) is also happening to the body's water (loss or gain). your question is "does the body lose or gain sodium when there is vasoconstriction"? the question is really one of how is the sodium affected by vasoconstriction of the arteries? with a decreased gfr is the person losing or gaining body water? if they are retaining their water, which is generally a feature of chronic renal failure, then they are retaining sodium as well.

Specializes in M/S Short Stay/TCU.

Thank you Daytonite.....:nurse:

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