Several
measures of pulmonary function change with growth of a child. Using the ulna as
a growth measure is useful in a child whose height is difficult to measure. The
authors are from the Royal Children's Hospital and University
of Melbourne in Australia.
(1)
The left arm is rested on a table with palm down and the elbow bent at 90°.
(2)
The distance from the distal lateral end of the ulna at the wrist to the
proximal end at the elbow is measured with calipers.
|
Value
|
Gender
|
Equation
|
|
X
|
male
|
(0.071
* (ulna length in cm)) + (0.046 * (age in years)) - 1.269
|
|
|
female
|
(0.072
* (ulna length in cm)) + (0.041 * (age in years)) - 1.272
|
|
Y
|
male
|
(0.077
* (ulna length in cm)) + (0.041 * (age in years)) - 1.285
|
|
|
female
|
(0.078
* (ulna length in cm)) + (0.037 * (age in years)) - 1.315
|
|
Z
|
male
|
(0.060
* (ulna length in cm)) + (0.053 * (age in years)) - 1.013
|
|
|
female
|
(0.053
* (ulna length in cm)) + (0.054 * (age in years)) - 0.806
|