Petrussa index
The Petrussa Index is used to assess the maturity of newborns .
criteria | 0 points | 1 point | 2 points |
---|---|---|---|
Ear shape | unformed | soft | firmly |
skin | transparent | thin | rosy, firm |
Nipples | only recognizable as a red dot | Areola <5 mm | Areola> 5 mm |
Testicles | not palpable | high in the scrotum | descends |
Labia | labia majora <labia minora | labia majora = labia minora | labia majora> labia minora |
soles | no wrinkles | distal folds | wrinkles everywhere |
0-2 points are given for each of these six criteria (the testes and labia criteria are gender-dependent). The maturity age ( gestation week ) is then calculated from the number of points + 30.
source
Muntau AC, Aust JK: Last Minute Pädiatrie, Urban & Fischer (2011) 1-20