Calculations IV: CLINICAL

Question 1

BMI equation

Answer 1

BMI = weight (kg)/[height (m)^2]

Question 2

NORMAL BMI classification

Answer 2

18.5 - 24.9

Question 3

Obese BMI classification

Answer 3

> /= 30

Question 4

IBW equation for males

Answer 4

50 kg + 2.3(height (in.) - 60)

Question 5

IBW equation for females

Answer 5

45.5 kg + 2.3(height (in.) - 60)

Question 6

Adj. BW equation for obese or overweight pts

Answer 6

IBW + 0.4(TBW - IBW)

Question 7

A pt is underweight (TBW < IBW), what weight must be used to calculate weight-based dosing for most medications?

Answer 7

TBW

Question 8

A pt is normal weight (TBW = IBW), what weight must be used to calculate weight-based dosing for most medications?

Answer 8

TBW

Question 9

What weight must be used for pts (regardless of BMI classification) who will be prescribed aminophylline, theophylline, acyclovir, and levothyroxine?

Answer 9

IBW

Question 10

A pt is obese (TBW > IBW), what weight must be used to calculate the dose for LMWHs, UFH, and vancomycin?

Answer 10

TBW

Question 11

A pt is obese (TBW > IBW), what weight must be used to calculate the dose for aminoglycosides?

Answer 11

Adj. BW

Question 12

Normal range of SCr

Answer 12

0.6 - 1.3 mg/dL

Question 13

What BUN:SCr ratio indicates dehydration?

Answer 13

> 20:1

Question 14

CrCl equation (mL/min) for men

Answer 14

(140 - age of pt)/[(72 x SCr)] x wt in kg

Question 15

CrCl equation (mL/min) f xor women

Answer 15

(140 - age of pt)/[(72 x SCr)] x wt in kg x 0.85

Question 16

A pt is underweight (TBW < IBW), what weight is used to calculate CrCl?

Answer 16

TBW

Question 17

A pt is normal weight (TBW = IBW), what weight is used to calculate CrCl?

Answer 17

IBW

Question 18

A pt is overweight or obese (TBW > IBW) and their BMI < 25, what weight is used to calculate CrCl?

Answer 18

IBW

Question 19

A pt is overweight or obese (TBW > IBW) and their BMI >/= 25, what weight is used to calculate CrCl?

Answer 19

Adj. BW