Longitudinal retrospective descriptive study undertaken after obtaining the approval from the ethics committee of the Instituto Colombiano del Dolor Medellín-Colombia once it was also endorsed and approved by the ethics committee of Universidad Pontificia Bolivariana, considering that the study was classified as a no-risk research pursuant to Ministry of Health Resolution 8430 of 1993.
Evaluar la proporción de pacientes que tuvieron respuesta al procedimiento analgésico según el tipo de analgesia epidural empleada.