Test 2

Question 1

body mass index (BMI)

Answer 1

(wt / ht 2) x 703

wt in lbs. ; ht in in.

≤18.4--underwt 
18.5-24.9--normal wt
25-29.9--overwt 
30-34.9--grade I obesity
35-39.9--grade II obesity
≥40--grade III obesity

Question 2

growth chart percentiles: BMI-for-age

Answer 2

≤5th percentile–underwt
6th-84th percentiles–healthy wt
85th-94th percentiles–overwt
≥95th percentile (≥30 kg / m2)–obese

Question 3

arm span

Answer 3

female = (1.35 x demi-span) + 60.1

demi-span in cm ; ht in cm

male = (1.40 x demi-span) + 57.8

demi-span in cm ; ht in cm

Question 4

Hamwi Equation—ideal body wt (IBW) =

Answer 4

female = 100 lbs. for first 5’—5 lbs. for each in. thereafter

-10% for small frame— +10% for lg frame

male = 106 lbs. for first 5’—6 lbs. for each in. thereafter

-10% for small frame— +10% for lg frame

Question 5

current body wt (CBW) as % of IBW =

Answer 5

CBW / IBW x 100

>120%--obese 
110-120%--overwt 
90-109%--not at risk / healthy
80-89%--mild underwt
70-79%--moderate underwt
≤69%--severe underwt

Question 6

relative body wt (RBW) =

Answer 6

actual wt / ref. wt x 100

adolescent:
90-120%--acceptable 
80-90%--mild deficit
70-79%--moderate deficit
≤69%--severe deficit

Question 7

% usual body wt (UBW) =

Answer 7

current wt / usual wt x 100

Question 8

% wt change (gain or loss) =

Answer 8

(usual wt – current wt) / usual wt x 100

≤4%–small
5-10%–potentially significant
≥11%–def significant

significant:
1-2% in 1 wk
5% in 1 no
7.5% in 3 mos
10% in 6 mos

severe:
>2% in 1 wk
>5% in 1 mo
>7.5% in 3 mos
>10% in 6 mos

Question 9

est. CBW for amputee =

Answer 9

(100 - % amputation) / 100 x body wt

entire arm--6.5%
upper arm--3.5%
forearm w/ hand--2.3%
forearm w/o hand--1.5%
hand--.8%
entire leg--18.5%
upper leg--11.6%
lower leg & food / below knee--5.3%
foot--1.8%

Question 10

adjusted BW =

Answer 10

paraplegic = IBW – 5-10%

quadriplegic = IBW – 10-15%

Question 11

waist-to-hip ratio (WHR) =

Answer 11

waist / hip

waist in cm ; hip in cm
	           women	        men
high risk	      ≥.86	        ≥1.1
moderate risk	.80-.85	.95-1
low risk	      ≤.79	       ≤.94

Question 12

waist circumference

Answer 12

high risk
female = >35”
male = >40”

Question 13

adjusted BW for obesity =

Answer 13

(CBW – IBW) x .25 + IBW

Question 14

Harris-Benedict Equation (HBE) =

Answer 14

female = 655.1 + 9.6 w + 1.9 h – 4.7 a

wt in kg ; ht in cm

male = 66.5 + 13.8 w + 5 h – 6.8 a

wt in kg ; ht in cm

Question 15

total cal need / total energy expenditure (TEE) =

Answer 15

BEE x AF x IF

BEE aka REE

Question 16

energy needed for maintenance =

Answer 16

wt x AF

Question 17

Mifflin-St. Jeor Equation (MSJE) =

Answer 17

female = (9.99 x wt) + (6.25 x ht) – (4.92 x age) – 161

male = (9.99 x wt) + (6.25 x ht)- (4.92 x age) + 5

wt in kg ; ht in cm

Question 18

REE adjusted for fever =

Answer 18

(current temp – 98.6°F) x 7

for every °F above normal body temp., energy needs ↑ by 7%

Question 19

est. protein intake for healthy pt =

Answer 19

.8 g / kg of BW

Question 20

est. N (g) intake for burn ≤10% =

Answer 20

total kcal / 150

1 g N for every 150 non-protein kcal

Question 21

est. protein intake (g) for burn ≤10% =

Answer 21

N x 6.25

16% protein is N→100% / 16% = 6.25

Question 22

est. N (g) intake for burn >10% =

Answer 22

total kcal / 100

1 g N for every 100 non-protein kcal

Question 23

est. protein intake (g) for burn >10% =

Answer 23

N x 6.25

16% protein is N→100% / 16% = 6.25
*protein needs ↑ w/ burn severity

Question 24

N balance =

Answer 24

(protein intake / 6.25) – (UUN – 4)

protein intake (g) in past 24 hrs. | urine urea N (UUN) (g) in past 24 hrs.
- 4 (constant) b/c dermal, fecal, & non-urea N losses

Question 25

total urinary urea N (UUN) (g) =

Answer 25

UUN x (urine vol / 100)

UUN in mg / 100 mL (dL) or urine sample ; 1000 mg = 1 g