The Bishop score is used to assess women for the induction of labor with oxytocin with or without artificial rupture of the placental membranes.
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 presenting part |
-3 |
0 |
|
|
-2 |
1 |
|
|
-1, 0 |
2 |
|
|
+1, +2 |
3 |
|
cervical consistency |
firm |
0 |
|
|
intermediate |
1 |
|
|
soft |
2 |
|
position of cervix |
posterior |
0 |
|
|
midway |
1 |
|
|
anterior |
2 |
where:
• A modification of the Bishop score uses 1 point for a station of -1 rather than the 2 points assigned in the original score.
• The Burnett score (see below) is sometimes referred to as the modified Bishop score.
Bishop score =
= SUM(points for the 5 parameters)
Interpretation:
• maximum score: 13
• minimum score: 0
• Induction of labor can be safely performed when the Bishop pelvic score is >= 9.
• A score of <=4 is associated with a significant induction failure rate.
Specialty: Obstetrics & Gynecology
ICD-10: ,
