Need help understanding...

DAMomma · Apr 18, 2007

Ok, I'm having trouble trying to understand a concept.
ADH, reduces excretion of urine and promotes water reabsorption of kidneys. So in FVD this would be increased because the body is trying to retain water? For some reason I cannot make sense of this! HELP! please!
Also, I'm in 2nd semester in ADN program and I have thought since day one that Hemoglobin is the # of RBC, but now I'm confused because I know it's the oxygen carrying ability of RBC. This is frustrating!

Okay, I am taking a stab at this (I stand to be corrected, we just went over this in class yesterday:uhoh21: ):

In FVD, there is a loss of H2O and electrolytes in the same proportion.

For the ADH to be released from the posterior pituitary gland, the blood concentration would have to have a high serum level of Na+. At that point, the kidneys are signaled to reabsorb H2O. The H2O dilutes the ECF (where the Na+ levels are high > 145 mEq/L) then the ECF is returned to normal NA+ levels 135-145 mEq/L.

I am thinking FVD would be treated with an isotonic solution since the problem is more of a volume problem (hypovolemia) rather than an electrolyte problem (hyper or hyponatremia).

I am so green at this....someone else?:sofahider

DAMomma · Apr 18, 2007

i am just bumping this up. am i understanding this concept correctly?

okay, i am taking a stab at this (i stand to be corrected, we just went over this in class yesterday:uhoh21: ):
in fvd, there is a loss of h2o and electrolytes in the same proportion.
for the adh to be released from the posterior pituitary gland, the blood concentration would have to have a high serum level of na+. at that point, the kidneys are signaled to reabsorb h2o. the h2o dilutes the ecf (where the na+ levels are high > 145 meq/l) then the ecf is returned to normal na+ levels 135-145 meq/l.
i am thinking fvd would be treated with an isotonic solution since the problem is more of a volume problem (hypovolemia) rather than an electrolyte problem (hyper or hyponatremia).
i am so green at this....someone else?:sofahider

gt4everpn, BSN, RN · Apr 18, 2007

Slow Down, It Gets Confusin, I Know Some Tips

1. Anti- Diuretic- Think Anti- Pee Hormone Or Against Peeing Hormone.

2. Fvd- Lack Of Water Problem

3. Now Put It Together If U Have A Lot Of Anti Or Against Peeing Hormone U Will Not Pee, Therefore U Hold In Water

4.if U Have No Anti Or Against Peeing Hormone Water Will Come Out-(peeing) Which = Fvd

5.hgb Is The Oxygen In Rbc's Your Right- Don't Confuse Yourself, Hematocrit(hct) Is The % Of Rbc's.

It Gets Confusin, We All Been Through It, Take It Slow Good Luck!

Megsd, BSN, RN · Apr 18, 2007

I'm having a brain fart... what's FVD?

emtb2rn, BSN, RN, EMT-B · Apr 18, 2007

I'm having a brain fart... what's FVD?

Fluid Volume Deficit.

gt4everpn, BSN, RN · Apr 19, 2007

Fvd= Fluid Volume Defecit- Low Amounts Of Fluids In The Body, Bloodstream.

LilNurse2b143 · Apr 19, 2007

I'll try my best to make it the easiest to understand!

-When fluid intake is low or the concentration of solutes in the blood is high, ADH is released from the pituitary, more water is reabsorbed, and less urine is excreted.

*Just think: The water is reabsorbed to equal out the concentrations in the blood. Therefore, this water won't be included in the urine output. So yes, in Fluid Volume Defecit, ADH will be stimulated and would cause the reabsorption of water, which in turn increases the volume of fluid in the body.

Hemoglobin- the red pigment in red blood cells that carries oxygen

Hematocrit- the proportion of RBC to the total blood volume

(the amount of red blood "cells" in relation to the plasma it's carried in)

Hope that helps!!

If anyone sees an error, PLEASE correct me!

crystalcoastlvr, BSN · Apr 21, 2007

Don't forget the importance of renin-angiotensin-and aldosterone in relation to fluid volume as well as other problems.

jules