Pre-Op

Question 1

Should patients take their antihypertensive medication before surgery?

Answer 1

YES

Question 2

Should patients take insulin before surgery?

Answer 2

only half of a long-acting insulin –> monitor their glucose levels pre/peri/post-surgery

Question 3

What tests should be run in women before surgery?

Answer 3

b-HCG (if childbearing age)

CBC to check for anemia from menses

Question 4

Who gets a preop ECG?

Answer 4

Everyone older than 40 yo

Question 5

What % of body weight is total body fluid vs intracellular vs extracellular?

Answer 5

Total: 60%
Intra: 40%
Extra: 20%
(TIE)

Question 6

How many liters of blood are in an avg man (70kg)?

Answer 6

5 L approx

Question 7

What are daily fluid requirements for:

water, K, Cl, Na

Answer 7

Water - 30-35 mL/kg (2100 mL for 70 kg man = over 2 L!)
K - 1 mEq/kg
Cl - 1.5 mEq/kg
Na - 1-2 mEq/kg

Question 8

In a normal day, water is lost mostly through….

Answer 8

urine (1200-1500 mL)

vs sweat, respiratory losses, feces