Bilateral Dual Transversus Abdominis Plane Block for Robotic Assisted Laparoscopic Surgery

A Randomised, Double-blind Study to Evaluate the Effect of Bilateral Dual Transversus Abdominis Plane Block on Postoperative Pain and Plasma Concentration of Ropivacaine After Robotic Assisted Laparoscopic Surgery

To evaluate the effects of bilateral dual transversus abdominis plane block on postoperative pain after robotic assited laparoskopic surgery and measure the plasma-level of ropivacain after the bilateral dual transversus abdominis plane block.

After randomisation patients for robotic assisted laparoscopic surgery will receive bilateral dual transversus abdominis plane block containing either ropivacain or isotonic potassium chloride.

The investigators will record pain-score, opioid-consumption and sensibility on the abdominal wall in the postoperative periode.

Also a blood sample will be taken at 15, 30, 60, 120 and 240 minutes after the block in order to measure the plasma-level of ropivacain after bilateral dual transversus abdominis plane block.

The investigators assume that there will be significant effect on postoperative pain and that the level of plasma-ropivacain will be acceptable.

Inclusion Criteria:

• patients scheduled for robotic assisted laparoscopis surgery
• acceptance to participate

Exclusion Criteria:

• allergies to local analgetics
• daily use of strong opioids