2. Square Window


Wrist flexibility and/or resistance to extensor stretching are responsible for the resulting angle of flexion at the wrist.

The examiner straightens the infant's fingers and applies gentle pressure on the dorsum of the hand, close to the fingers. From extremely pre-term to post-term, the resulting angle between the palm of the infant's hand and forearm is estimated at;

>90°, 90°, 60°, 45°, 30°, and 0°.

The appropriate square on the score sheet is selected.

wrist






SIGN NEURO-MUSCULAR MATURITY SCORE SIGN SCORE
-1 0 1 2 3 4 5
Square Window square window square window square window square window square window square window                      

References :
Ballard JL, Khoury JC, Wedig K, et al: New Ballard Score, expanded to include extremely premature
infants. J Pediatrics 1991; 119:417-423.

Neuromuscular Maturity

Physical Maturity