we have been using B'Braun pumps for the purpose of post operative analgesia for last 4 years or so.
the pumps that we use have a capacity of 125ml and have a fixed output rate of around 5ml per hour.
we make a concentration of 0.125% bupivacaine ( 30ml bupivacaine 0.5% + 90ml saline ) with 3mg of butorphanol added to it.
the concentration of bupivacaine can be titrated depending on the pain.
we don't use pumps for labour. The dose is titrated according to the response.

Dr. Mandeep Goma
Goma Niwas
Chakkar, Shimla - 5,
HP, India
+91-94180-03155