3. Measurement considerations for children with special needs

3.1 Measures of Stature and Length

Arm span
The arm span, when accurately measured, should equal stature 1:1 if growth is normal.

Arm span measurement requires two people to complete measurements. The child extends both arms, while the anthropometer or measuring rod is held across the back, extended from the tip of one middle finger to the other (Trahms, 1997).

Arm span measurements can be plotted on the CDC charts for stature-for-age or length-for-age.

This is a photo of correct technique for arm span measurement. Note that the child's arms are perpendicular to his body and the anthropometer is touching the extended middle fingers of the right and left hands.

This is a photo of incorrect technique for arm span measurement. This child is not able to extend his arms fully, so an inaccurate measure would be taken. Therefore, arm span is not an appropriate measurement for this child.