Intrathecal diamorphine for perioperative analgesia during colorectal surgery: a cross-sectional survey of current UK practice.

Intrathecal diamorphine is widely used by UK anaesthetists for patients undergoing major elective laparoscopic colorectal surgery. However, there is little consensus regarding optimal dosing. Therefore, high-quality randomised dose-response trials are needed to investigate the relationship between doses of intrathecal diamorphine and patient outcomes.