Transcript File
Nutrition: NURS 1115
Conversion
Large Unit
1 inch 1kg 1 foot 1 kcal 1 m
Small Unit
2.54 cm 2.2 lbs 12 inches 4.184 kj 100 cm NB:
From a larger unit to a smaller unit multiple.
From a smaller unit to a larger unit divide.
BMI calculations
Weight (kg)/Height(m 2 ) John weighs 5 kg and is .5 m tall. What is his BMI?
Answer
= 5/ .5 * .5
= 5/ 0.25= 20kg/m 2
BMI calculations
Weight(lbs)/ Height (inches 2 ) * 703 Peter weighs 180 lbs and is six feet tall. Calculate his BMI?
Answer
=180/ (72 *72)* 703 = 180/5184 * 703 = 0.0347* 703 =24.39 lbs/inches 2 http://www.cdc.gov/healthyweight/assessing/bmi/adult _bmi/index.html
Caloric Requirements- BMR
Harris Benedict Formula
Women: BMR = 655 + ( 9.6 x weight in kilos ) + ( 1.8 x height in cm ) - ( 4.7 x age in years ) Men: BMR = 66 + ( 13.7 x weight in kilos ) + ( 5 x height in cm ) - ( 6.8 x age in years )
Calculating BMR for Women: An Example
20 year old Shuana weighs 54kg, and is 1.2 m tall. Calculate her BMR.
BMR= 655+ (9.6 * 54) + (1.8 * 120) – (4.7 * 20) 655+ (518.4)+(216)- (94) = 1389.4-94 =1295.4 calories
Calculating BMR for Men: An Example
22 year old Shuan weighs 68kg, and is 1.6 m tall. Calculate his BMR.
BMR= 66 + (13.7 x 68) + (5 x 160) - (6.8 x 22) = 66+ (931.6)+ (800)-(149.6) =1797.6-149.6
=1648 calcories
Calculating Physical Activity Level
Rate (BMR)
Category
Sedentary
PAL
1.2
Description
(little or no exercise, desk job) Lightly active Moderately active Very active 1.375
1.55 1.725
(light exercise/sports 1-3 days/wk) (moderate exercise/sports 3-5 days/wk) (hard exercise/sports 6-7 days/wk) Extra Active 1.9
(hard daily exercise/sports & physical job or 2 X day training, marathon, football camp, contest, etc.)
Calculating Physical Activity Level
If Sharon total energy expenditure for the last 24 hours is 1836.5 kcal and her BMR is 1479.8 kcal what is her PAL? Categorise her PAL.
PAL= TDEE/BMR = 1836.5/1479.8
= 1.24
PAL category: Low active
Calculating Total Daily Energy Requirement
Caloric Requirement- BMR * PAL Shari has a BMR of 1524 kcal/day and is moderately active. How much calories must she take in per day to meet her caloric requirements TER= 1524*1.55
= 2362.22 kcal
Atwater factors
Macronutrients and Alcohol Protein Carbohydrate Fat Alcohol Energy contribution 4 kcal/g 4 kcal/g 9 kcal/g 7 kcal/g
Calculating energy contributions Macronutrients
Each 2gram dumpling consists of 0.5 g of carb and 0.3 g of protein and 0.1 g of fat.
Kerry consumes 3 ½ dumplings, 2 grams of salt fish prepared in 2.25 grams of oil. She drinks a bottle of “Sprout juice” which reads 25 grams of carbs and 30 grams of protein, and total fat is 13g per serving.
Calculating energy contributions-
Macronutrients
Each bottle contains 1.5 servings.
Calculate the number of calories Kerry receives from fat, carbohydrates, and protein and the total caloric intake for that meal.
Energy from carbohydrates
Answer
Carb= 3.5 * 0.5 from dumpling= 1.75 g From juice= 25 * 1.5= 37.5 g Add all carbs consumed= 1.75 + 37.5= 39.25 g Energy from carb= 39.25g * 4kcal/ 1 g= 157 kcal/g
Energy from Fats
Fat from dumpling= 3.5 * 0.1= 0.35g
Fat from oil= 2.25 g Fat from juice= 13g Add all the fat contribution= 0.35g + 2.25g+ 13g= 15.6g
Energy from fat = 15.6g * 9kcal/1 g= 140.4 kcal
Energy from Protein
Protein from dumpling = 3.5 * 0.3g= 1.05g
Protein from juice = 30g* 1.5= 45g Add all the protein contribution= 1.05g + 45 g= 46.05g
Energy from Protein= 46.05g * 4Kcal/1 g= 184.2 kcal
Total Energy consumed
Total energy consumed= sum of fat, protein and carbohydrate energy contribution = 184.2kcal+ 140.4 kcal+ 157kcal = 481.6 kcal
Malnutrition Universal Screening Tool (MUST) for adults Step 1. BMI Score 0= > 20 1= 18.5 -20.0
2=< 18.5
Step 2. Unplanned weight loss score 0=<5% 1= 5-10% 2=>10%
MUST
If wt or ht cannot be established, use documented or recalled values.
If none of the values can be obtained: Use clinical impression (very thin, thin, obese) and mid-upper arm circumference (<23.5 cm- thin) & (>32 cm = obese)
MUST
Wt change: clothes, jewelry loose-fitting =wt loss, or too tight=wt gain History of decreased food intake, loss of appetite or dysphagia over 3-6 months
MUST
Underlying disease or psychosocial/physical disabilities likely to cause wt change Acute disease with negligible intake
MUST
Step 3. Acute disease score: 2 = none or negligible intake for >5 days Step 4. Add the scores to calculate overall risk of malnutrition 0 = low risk: routine clinical care 1 = medium risk: observe 2 or more= high risk: treat
Calculations of MUST score
Jemma is 20 years old and weighed 45kg last month and now weighs 41 kg. He is 155 cm tall. He has had little appetite for the last month and has stage 3 cancer. Calculate his MUST score. Step 1 BMI= 45/1.55 * 1.55= 45/2.4025
18.73kg/m2
Calculations of MUST score
Step 2
Percentage weight loss:
Current percentage of usual weight- 41/45 *100= 91.11
Percentage weight loss- 100- 91.11= 8.89 % Step 3 Disease score= 2 Step 4 compute the scores BMI score= 1 Weight loss score= 1 Disease score= 2 Total score= 4 Recommendation High Risk-Treat
Calculating Waist Hip Ratio
Waist (unit)/hip (unit) NB units must be the same WHR is the ratio of the circumference of the waist to that of the hip Recommendations WHO STEPS states that abdominal obesity is defined as a waist–hip ratio above 0.90 for males and above 0.85 for females and increased cardiovascular risk
Calculating Waist Hip Ratio
Freta has a waist circumference of 32 cm and a hip circumference of 14.96 in What is her WHR and your recommendations for her?
WHR = WC/HC in same unit Convert HC- cm= 14.96 in* 2.54cm/ 1 in= 38 cm Divide WC by HC=32/38 = 0.84
Low cardiovascular risk (normal)
Caloric intake from IV administration
Nurse Joy is caring for critically ill Koju. Koju is ordered to receive 20% DW in 500 mls and 1L requirement.
How many calories is Koju receiving daily? How many bags of fluid are needed to meet a requirement of 1600 kcal? Volume of Dextrose in 500ml bag- 20/100 * 500= 100mls 1ml = 1g Thus 100mls dextrose = 100g dextrose Number of calories provided by each bag of DW= volume of dextrose per * 4kcal = 100 * 4kcal= 400kcal Number of calories in 1L= conversion of L= mls 1L = 1000mls
Caloric intake from IV administration
Number of 500ml bag in 1L= 1000/500= 2 Multiply number of bags by kcals per bag= 2* 400kcal= 800 kcals
Answer to number of calories that Koju is receiving daily= 800 kcals Ques 2.- Bags of fluid needed to meet 1600 kcal requirement
Divide TEE by calories per bag= 1600kcal/ 400kcal *1 bag= 4 bags Convert bags to mls= 1 bag = 500mls Thus 4 bags = 500 mls* 4bags/ 1 ml= 2000mls Convert to L= 2000ml/ 1000ml * 1L= 2L
Caloric Intake_ Macronutrients
Square has a TEE of 1850 kcal per day? What is the expected contribution of the three macronutrients; using the ratio of carbs – 55%, protein- 30%, fats- 15%.
Carb= 1850* 55/100= 1017.5 kcal Protein= 1850 * 30/100= 555 kcal Fats= 1850 * 15/100= 277.5 kcal Total= ( 1017.5 + 555 + 277.5) kcal= 1850 Kcal
Caloric Intake_ Macronutrients
Paige has a TEE of 1920 Kcal/d? What mass of macronutrients should she consume to meet RDA; using RDA values of 55% carb, 30% protein & 15% fats.
Mass of Carbs required for 1 day
Carb= 1920 kcal * 55/100= 1056 kcal Kcal to gram= 1056/ 4 kcal * 1 g= 264 g
Mass of Protein required for 1 day
Protein= 1920* 30/100= 576 kcal Kcal to gram= 576/ 4kcal * 1g= 144 g
Mass of Fats required for 1 day
Fat= 1920 * 15/100= 288 kcal Kcal to gram= 288/9 kcal * 1g= 32 g
Calculating Ideal weight
Usual Frame size can be estimated using wrist circumference, or elbow breadth measurement.
Growth charts and assessment of children
James is 6 months old and weighs 6.5 kg and is 22 cm tall. Using the growth chart for boys identify his percentile: Weight for age Weight for length Length for age BMI for age – weight for length for age Growth Charts\L_A and W_A growth charts (Boys).pdf
Growth Charts\W_L growth charts.pdf
References
Retrieved from http://www.cdc.gov/healthyweight/assessing/bmi/adu lt_bmi/index.html
Xuereb, G. C. (2004). Healthy eating for better living: A manual on nutrition and HIV/AIDS for healthcare workers in the Caribbean. Cajanus, 37(4): 171-224. Retrieved from www.paho.org/cfni Retrieved from http://www.who.int/childgrowth/en