VBAC Risk Score for Successful Vaginal Delivery (Flamm Model)
Why Use
Determining which laboring patients are likely to have successful or unsuccessful vaginal delivery would be helpful for labor planning and shared decision making.
When to Use
Women in labor with history of caesarean section delivery.
Pearls / Pitfalls
The VBAC Risk Score for Successful Vaginal Delivery (Flamm Model) is a simple scoring system for use at labor admission to predict which patients will have a successful vaginal birth after prior caesarean section (VBAC). It includes cervical assessment which can only be used after admission for labor. A high VBAC Risk Score predicts success, but a low score does not necessarily predict failure; clinical judgment should be always considered.
Critical Actions
A low VBAC Risk Score does not predict failure.
More Information
VBAC Score % of Women with Successful VBAC 0 - 2 49 3 60 4 67 5 77 6 89 7 93 8 - 10 95