A power analysis based on a previous study, (6) in which the mean amount of postoperative morphine consumption was found to be 67 mg (standard deviation (SD) 28 mg) with a placebo block and 48 mg (SD 27 mg) with an IHII block, showed that two groups of 29 patients each would be required to demonstrate a 25% difference in postoperative morphine consumption with [alpha]=0.
The findings of this study show that intra-abdominal IHII nerve blockage with levobupivacaine during CS is a safe and effective way of reducing postoperative pain and analgesic drug requirement.
Percutaneous IHII nerve blockage has been used previously for postoperative pain management after CS.
recommended a new technique including multi-level injections for IHII blockage, reporting a success rate of up to 95%.
In the classic IHII nerve block the target point for the block is 2-2.
It is obvious that an IHII block will not relieve visceral pain after CS.