S5. Fluid Flashcards
1
Q
Total body weight in a newborn
A
75%
2
Q
Total body water in elderly
A
45%
TBW changes as lose muscle mass
3
Q
What way does NaK+ ATPase move K and Na?
A
K+ IN
Na+ OUT
4
Q
Whats the main contributor to plasma osmolality
A
Na sodium
5
Q
Why do patients need fluids?
A
- nil by mouth awaiting surgery
- malfunctioning GI tract e.g. post stroke
- dehydration
- fluid losses
- abnormal electrolytes
6
Q
Problems with administering fluids to hospitalised pstients
A
- high ADH> more resbsorption > hypernatremia
- RAAS activated due to metabolic stress
- inc water and salt retention> volume overload
