-
What is nl plasma osmolality?
280-295
-
How do you calculate serum osm?
(2 x Na) + urea + glucose
This is a rough equation
-
Name ineffective osmoles
EtOH, urea
They freely cross membrane of cells but do not pull fluids with them
-
What causes hypertonic ECF?
- Excessive H20 loss (diarrhea, vomiting, sweating)
- Insufficient H20 intake (extreme exercise, desert travel, not being able to take PO)
-
What causes hypotonic ECF?
- Volume overload due to renal failure or cirrhosis
- SIADH
-
Normal saline contains how much of the following?
mOsm/L
Glucose
Na
Cl
HCO3
K
- mOsm/L: 308
- Glucose: 0
- Na: 154
- Cl: 154
- HCO3: 0
- K: 0
-
1/2NSS contains what?
mOsm/L
Glucose
Na
Cl
HCO3
K
- mOsm/L: 154
- Glucose: 0
- Na: 77
- Cl: 77
- HCO3: 0
- K: 0
-
What is a good urine output?
0.5-1cc/kg/hr is adequate
-
What do maintenance fluids contain?
Na, water, glucose, K
-
Howo do you calculate maintenance fluid?
4:2:1
-
|
|