NCT00484731

Effect of Intraoperative Infiltration With Bupivacain on the Development of Chronic Pain After Inguinal Hernia Repair

Investigating the Effect of Intra-operative Infiltration With Local Anaesthesia on the Development of Chronic Postoperative Pain After Inguinal Hernia Repair. A Randomized Placebo Controlled Triple Blinded and Group Sequential Study Design

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 404 (actual)
• Sponsor: Luzerner Kantonsspital · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

The effect of intraoperative infiltration of the operation site with bupivacain on the development of chronic pain is the object of our trial. We hypothesize that the occurrence of chronic pain in the goup of patients receiving the infiltration will be 50% less than in the placebo group receiving normal saline. The study is a randomized controlled triple blinded trial with a sequential study design.

Detailed description

264 patients scheduled for an inguinal hernia repair using one of three procedures (Lichtenstein, Barwell and TEP = total extraperitoneal hernioplasty) are being randomly allocated intra-operatively into two groups. Group I patients receive a local injection of 20ml Carbostesin® 0.25% at the end of the operation according to a standardised procedure. Group II patients get a 20 ml placebo (0.9% Saline) injection. We use pre-filled identically looking syringes for blinded injection, i.e. the patient, the surgeon and the examinator who performs the postoperative clinical follow-ups remain unaware of group allocation. The primary outcome of the study is the occurrence of developing chronic pain (defined as persistent pain at 3 months FU) measured by VAS and Pain Matcher® device (Cefar Medical AB, Lund, Sweden). In addition to a sample size re-evaluation three interim analyses are planned after 120, 180 and 240 patients had finished their 3-months follow-up to allow for early study termination.

Conditions

• Chronic Pain

Interventions

Type	Name	Description
PROCEDURE	Infiltration with Saline	Infiltration with Bupivacaine according to protocol
PROCEDURE	Infiltration with Bupivacaine

Timeline

• Start date: 2006-07-01
• Primary completion: 2011-12-01
• Completion: 2012-06-01
• First posted: 2007-06-11
• Last updated: 2021-02-18

Locations

1 site across 1 country: Switzerland