|
Overview :
Narayanan
et al developed a simple score for estimating a newborn infant's gestational age
based on four physical findings. The authors are from Lady Hardinge Medical
College and the Institute of Research and Medical Statistics in New Dehli,
India.
Infant
selection: first 1-2 days of life
Parameters:
(1)
anterior vascular capsule of the lens, using the criteria of Hittner (see
previous section)
(2)
plantar crease
(3)
breast nodule
(4)
ear firmness
|
Parameter |
Finding |
Points |
|
ocular lens |
Grade
IV (vascularity extends to center with no clear zone) |
0 |
|
|
Grade
III (central clearing with vascularity extending into inner third) |
1 |
|
|
Grade
II (central clearing in central half to two third) |
2 |
|
|
Grade
I (vascularity limited to outer third of capsule) |
4 |
|
|
Grade
0 (no vascularity) |
4 |
|
plantar crease |
no
creases |
0 |
|
|
faint
red marks over anterior half |
1 |
|
|
reddish marks over
anterior half; definite creases over anterior third |
2 |
|
|
creases over more than
anterior third |
3 |
|
|
creases all over; deep
indentations over anterior third |
4 |
|
breast nodule |
no
breast tissue palpable |
0 |
|
|
nodule on one or both
sides < 0.5 cm |
1 |
|
|
nodule on one or both
sides 0.5 – 1.0 cm |
2 |
|
|
nodule on one or both
sides > 1.0 cm |
3 |
|
ear
firmness (pinna) |
extremely soft |
0 |
|
|
soft
along the edge; easily folded with slow recoil |
1 |
|
|
some
cartilage but thin at places; ready recoil if folded |
2 |
|
|
stiffened by cartilage
up to the periphery; immediate recoil if folded |
3 |
total score
=
=
SUM(points for all 4 parameters)
|
Total
Score |
Gestational Age in
Weeks |
|
1 |
28 |
|
2 |
29 |
|
3 |
29.5 |
|
4 |
30.5 |
|
5 |
31 |
|
6 |
32 |
|
7 |
33 |
|
8 |
34 |
|
9 |
35 |
|
10 |
36 |
|
11 |
37 |
|
12 |
38 |
|
13 |
39 |
|
14 |
40 |
Performance:
• The 95%
confidence interval was +/- 11 days.
|