Friedman proposed modifications of the Bishop score by multiplying the raw point scores by factors to give scores reflecting simple and complete weighting. The modifications purportedly give greater accuracy in predicting inducibility.
Patient selection: The patient should be multiparous.
Parameters for Bishop Score:
(1) dilatation of the cervix
(2) effacement
(3) station
(4) cervical consistency
(5) position
|
Parameter |
Finding |
Points |
|
dilatation |
0 cm |
0 |
|
|
1 - 2 cm |
1 |
|
|
3 - 4 cm |
2 |
|
|
>= 5 cm |
3 |
|
effacement |
0 - 30% |
0 |
|
|
40 - 50% |
1 |
|
|
60 - 70% |
2 |
|
|
>= 80% |
3 |
|
station of the presenting part |
-3 |
0 |
|
|
-2 |
1 |
|
|
-1, 0 |
2 |
|
|
+1, +2 |
3 |
|
cervical consistency |
firm |
0 |
|
|
intermediate |
1 |
|
|
soft |
2 |
|
position of the cervix |
posterior |
0 |
|
|
midway |
1 |
|
|
anterior |
2 |
|
Parameter |
Simple Weighting |
Complete Weighting |
|
dilatation |
2 |
4 |
|
effacement |
1 |
2 |
|
station |
1 |
2 |
|
cervical consistency |
1 |
2 |
|
position |
0 |
1 |
raw Bishop score =
= SUM(points for the 5 parameters)
simple weighting score =
= SUM((point for parameter) * (simple weighting factor))
complete weighting score =
= SUM((point for parameter) * (complete weighting factor))
Interpretation:
|
Score Range |
Bishop |
simple weighting |
complete weighting |
|
minimum |
0 |
0 |
0 |
|
maximum |
13 |
14 |
30 |
Failure with induction (after Table 7, page 639, Hughey 1976)
|
Simple Weighting |
Complete Weighting |
Induction Success |
|
11 - 14 |
21 - 30 |
excellent |
|
8 - 10 |
16 - 20 |
very good |
|
5 - 7 |
10 - 15 |
a few failures |
|
1 - 4 |
<= 9 |
30-40% failure |
Specialty: Obstetrics & Gynecology
ICD-10: ,
