NCT01305603

Ultrasound-guided Dual TAP Block: Magnetic Resonance (MR) Evaluation of the Distribution of Local Anesthetic

Dual TAP Block Characteristics - Evaluation of Local Anesthetic Distribution by MR Scanning

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 10 (actual)
• Sponsor: Bispebjerg Hospital · Academic / Other
• Sex: Male
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

Using Magnetic resonance (MR) scanning and ultrasonography the investigators wish to investigate, in what way a known volume of local anesthetic injectate will be distributed in the transverse abdominis plane (TAP) in young healthy male volunteers. The investigators compare the anatomical distribution of the local anesthetic injectate in the TAP when performing an ultrasound-guided classical TAP block and a Dual TAP block. The investigators also want to compare the spread of anesthetized frontal dermatomes when performing an ultrasound-guided classical TAP block and a Dual TAP block.

Detailed description

There has been much debate as to what extent the classical TAP block will anesthetize more than the frontal dermatomes (TH10-Th12/L1). Some cadaver studies have been performed with injection of dye in the classical TAP. However, it is still not clear whether a single injection of local anesthetic in the classical TAP block position will reach the more cephalad and medial intercostal TAP plexus (Th6-Th9). In this study the investigators use MR scanning and ultrasonography to investigate in what way a known volume of local anesthetic injectate will be distributed in the transverse abdominis plane (TAP) in young healthy male volunteers. The investigators compare the anatomical distribution of the local anesthetic injectate in the TAP when performing an ultrasound-guided classical TAP block and a Dual TAP block. The investigators also want to compare the spread of anesthetized frontal dermatomes when performing an ultrasound-guided classical TAP block and a Dual TAP block.

Conditions

• Pain, Postoperative

Interventions

Type	Name	Description
DRUG	Bupivacaine	On both sides of the abdomen 30 ml of bupivacaine 2.5 mg/ml will be injected. This is a total of 60 ml of bupivacaine 2.5 mg/ml.
PROCEDURE	Injection	Injection under ultrasound-guidance

Timeline

• Start date: 2011-02-01
• Primary completion: 2013-04-01
• Completion: 2013-04-01
• First posted: 2011-03-01
• Last updated: 2013-04-11

Locations

1 site across 1 country: Denmark