measuring ammeter parameter cumference can be helpful if it is not possible to weigh a person meta parameter cumference does not indicate a specific weight but if measurements are repeated over time it can show if someone is gaining or losing weight The Omen trophy dietitian will advise how often to check a person's Hope mid upper arm circumference and will be able to advise on what the measurement you take means and what changes you may need to be made you may need two people to take a meta prom circumference on a child or a person who may struggle to follow instructions for this procedure you will need the following equipment a must disposable measuring tape that the dietician can give you a ballpoint pen first of all you want to wash your hands for at least 20 seconds before taking the measurement in a clinical setting you may choose to wear gloves or relevant PPE the measurement should be taken on the left or least affected arm if the person has had a stroke or has altered tone in their limbs first off we need to find the midpoint of the arm the arm should be bent at a right angle locate the tip of the shoulder bone then locate the tip of the elbow using a tape measure measure between the two points and use your ballpoint pen to mark the halfway point when taking the arm circumference measurement the arm should be hanging down by the side of the body and relaxed put the tape measure around the midpoint and record the measurement the tape should not be too tight to pinch the skin or to loose and the zero mark should line up with your measurement do not worry about the colors on the bottom of the tape simply write down the measurement and send it to your dietitian who will let you know if any changes need to be made