Obesity

Question 1

Respiratory:

what are the most commonly reported abnormalites of the pulm system?

Answer 1

Decreased FRC (by 50%)

decreased ERV

FRC = RV + ERV

thus 1 decreases so does the other

Question 2

Respiratory:

what is the most sensitive indicator of the effect of obesity on the pulmonary fucntion?

Answer 2

ERV

Question 3

Respiratory:

FRC falls exponentially with increasing what?

Answer 3

BMI

Question 4

Respiratory:

eventually as BMI continues to climb FRC falls below what

Answer 4

CC

Question 5

Respiratory:

when FRC falls below CC what occurs

Answer 5

V/Q mismatch

Question 6

Respiratory:

what 3 peramiters decrease

Answer 6

FRC

ERV

TLC

Question 7

Respiratory:

what 3 peramiters do not change

Answer 7

TV

CC

RV

Question 8

Respiratory:

what is the formula for TLC? explain why it decreases in the obese pt

Answer 8

TLC = FRC + IC

obese TLC is decreased bc FRC is decreased

Question 9

Respiratory:

what is the formula for FRC? and why is it reduced in obesity

Answer 9

FRC = RV + ERV

obesity decreases ERV thus decreaseing FRC

Question 10

Respiratory:

obese pt’s usually have Rapid, Shallow breathing patterns characteristic of what type of lung disease

Answer 10

restrictive

Question 11

Respiratory:

rapid, shallow breathing dramatically increases what?

Answer 11

work of breathing

Question 12

Respiratory:

what is the most common blood gas abnormality in the obese individual?

Answer 12

arterial hypoxemia