Pharmacology Pt. 2 Flashcards
What percent of the body is made up of water?
60%
What percent of the body’s water is intracellular?
40%
What percent of the body’s water is extracellular?
20%
Of the body’s extracellular water, how much is intravascular?
1/4
Of the body’s extracellular water, how much is interstitial?
3/4
What physical exam findings would you assess for hydration/dehydration?
skin turgor, CRT, MM color
What is mild dehydration?
~5%, minimal loss of skin turgor, semidry mucous membranes, normal eyes
What is moderate dehydration?
~8%, moderate loss of skin turgor, dry mucous membranes, weak rapid pulses, sunken eyes
What is severe dehydration?
~10%, considerable loss of skin turgor, tachycardia, extremely dry mucous membranes, weak/thready pulses, low blood pressure, at 12%, sunken eyes and altered level of consciousness
How is hydration deficit calculated?
% dehydration (as a decimal) x wt in kg = ___ L (volume in liters)
How are maintenance fluids calculated?
kg x 40-60ml/kg/day = ml/day
ml/day + estimated ongoing losses (V/D) + hydration deficit = ml/day
ml/day divided by 24 hours = ml/hour
What 3 values need to be known to calculate a fluid rate?
hydration deficit, maintenance needs, ongoing losses
Shock blouses are given at ___________ in dogs.
80-90ml/kg
Shock boluses are given at ___________ in cats.
50-55ml/kg
How are boluses calcuated?
kg x ml/kg = ml total to give
How should boluses be given?
give 1/4 of total amount then reassess
If 50% of shock bolus is not causing significant improvement, what can be added to fluids to help?
a colloid
What fluids are appropriate for SQ fluids?
use isotonic crystalloids only
What are the signs of overhydration?
increased respiratory rate, increased lung sounds/crackles on lung auscultation, pitting edema, increased blood pressure, chemosis, body weight increase of more than 10 percent
What is the drip rate for a micro drip set?
60 drops/ml
What is the drip rate for a macro drip set?
15 drops/ml
Which fluids are crystalloids?
Normosol R, Plasmalyte, Physiologic saline, Lactated Ringers
What kind of crystalloids are Normosol R, Physiologic saline, and Lactated Ringers?
isotonic crystalloids
Which fluids are colloids?
hetastarch, dextran 70, oxyglobin, plasma, albumin, whole blood