objective By the end of this lesson, you will be able to :  Identify the accurate ways to measure and record height and weight.

content  Introduction  Uses of height & weight  Expresses of height & weight  scales of measure  Nursing role  BMI  Categories of BMI for Adults  Documentation  Practices & practical

Introduction

Cont…

Uses of height & weight : height & weight measurements provide  Valuable data about your patient’s growth and development.  Nutritional status.  Overall general health.  Accurate assessment of height and weight is also a vital assessment used to determine appropriate medication dosages.

Con…  and to evaluate the effectiveness of drug, fluid, and nutritional therapy.

Examples of uses  Weights above the normal range may indicate obesity or fluid retention.  Weights below the normal range may indicate malnutrition, delayed growth and development.  cachexia (weight loss marked by weakness and emaciation that usually occurs with a chronic illness such as tuberculosis or cancer).  Height is compared with weight to evaluate growth of infants and children.

Expresses of height  Measurement of height is expressed in inches (in.), feet(ft), centimeters (cm), or meters (m).  1 in. = 2.5 cm 1 cm = 0.4 in.  1 ft = 30.5 cm or 0.3 m  1 m = 39.4 in. or 3.28 ft

Expresses of weight  Measurement of weight is expressed in ounces (oz),pounds (lb), grams (g), or kilograms (kg);  1 lb = 0.45 kg 1 kg = 2.2 lb  1 oz = 28.4 g 1 g = 0.35 oz

scales of measure

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Nursing role  If serial weights are being done, weigh the patient on the same scale at the same time of day.  Be sure to document the measurements in centimeters or inches, kilograms or pounds.  Because children have frequent changes in growth and development, their measurements are often documented on growth charts for easy monitoring.

BMI-Calculating body mass index ( ideal weight )

Calculate of BMI  To calculate the BMI the following formula is used:  BMI calculation weight (kg) height2 (m)

Con…. For example: If a female client’s weight is 50 kg and height is 1.68 m the BMI is: x 1.68 = The example above of 17.7 indicates that the client is underweight and therefore malnourished

Con ….

Con..  Practice on the same example : 50 kg = m = 66.2 in 110 BMI =  = 17. 7

Categories of BMI for Adults Age 20 or Over Reference ranges for a desirable BMI are: men: 20.5–25.0 women: 19–24 25–30 = overweight above 30 = obese

Other Reference BMI Weight Status : Below 18.5 Underweight 18.5 – 24.9 Normal 25.0 – 29.9 Overweight 30.0 and Above Obese

Documentation  The height and weight measurements are recorded on the appropriate form, such as the admit assessment form.  Daily weights are usually recorded on the vital signs record.  If the weight is taken at a different time or on a different scale, the variation should be recorded.

Exercise  The BMI chart is not for babies, children, teens, pregnant or breast feeding women, adults over 65 years old, very muscular people and endurance athletes such as runners, WHY ?

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