MUST- Malnutrition Screening Tool
Malnutrition Universal Screening Tool(MUST)‘MUST’ is a five-step screening tool to identify adults, who are malnourished, at risk of malnutrition (undernutrition), or obese. It also includes management guidelines which can be used to develop a care plan.
It is for use in hospitals, community and other care settings and can be used by all care workers.
When to use this tool
MUST should be measured for all inpatients on admission and then weekly during their hospital stay.
5 Steps to Assess Nutritional Status
Measure height and weight to get a BMI score using the chart provided. If unable to obtain height and weight, use the alternative procedures shown in this guide.
Step 2Note percentage unplanned weight loss and score using tables provided.
Step 3Establish acute disease effect and score
Add scores from steps 1, 2 and 3 together to obtain overall risk of malnutrition.
Step 5Use local policy to develop care plan.
Body Mass Index (BMI) Ready-Reckoner
Why not try our online BMI Calculator (here)
Height (Feet & Inches)
To calculate BMI using chart:
Weigh the patient without shoes
Measure the patients height without shoes
Place a ruler on the ready reckoner along the patients weight. Read the BMI score where their weight line crosses their height line
If height cannot be obtained, use length of forearm (ulna) to calculate height using tables below.
Estimating height from ulna lengthMeasure between the point of the elbow (olecranon process) and the midpoint of the prominent bone of the wrist (styloid process) (left side if possible).
Estimating BMI Category from mid arm circumference (MUAC)
The subject’s left arm should be bent at the elbow at a 90 degree angle, with the upper arm held parallel to the side of the body. Measure the distance between the bony protrusion on the shoulder (acromion) and the point of the elbow (olecranon process). Mark the mid-point.
Ask the subject to let arm hang loose and measure around the upper arm at the mid-point, making sure that the tape measure is snug but not tight
If MUAC is < 23.5 cm, BMI is likely to be <20 kg/m2.
If MUAC is > 32.0 cm, BMI is likely to be >30 kg/m2.
Calculate percentage weight lossWhy not try our online % weight loss calculator (here)
Calculate Acute Disease effect score. If a patient is acutley ill and there has been or is likely to be no nutritional intake for more than 5 days then score 2.
Add together scores from steps 1,2 and 3 and this is equal to the malnutrition risk Score