Regional Anesthesia Block of the Transversus Abdominis Plane in Children Undergoing Gastric Tube Insertion

The Hospital for Sick Children

Status and phase: Terminated; Phase 3

Conditions: Enteral Nutrition; Anesthesia

Treatments: Procedure: bupivacaine with epinephrine (mid and upper abdomen); Procedure: bupivacaine with epinephrine (transversus abdominis plane)

Study type: Interventional

Funder types: Other

Identifiers

NCT00564655

1000011192

Details and patient eligibility

About

The objective of this trial is to examine if regional anesthetic blockade of the anterior abdominal wall via the transversus abdominis plane is a safe and feasible method of providing analgesia for children undergoing gastric tube insertion.

Full description

Regional abdominal field blockade has been demonstrated to deliver effective analgesia for procedures involving the anterior abdominal wall and may represent a feasible, minimally invasive alternative to central neuraxial blockade for some procedures and surgery of the abdomen.

Regional anesthesia and analgesia techniques are commonly advocated for post-operative pain control in pediatric surgical practice. Regional techniques decrease morphine requirements and improve the quality of post-operative pain control and patient-parent satisfaction. The most commonly used technique is caudal anesthesia, which is generally indicated for urologic surgery, inguinal hernia repair and lower extremity surgery. Complications are rare and usually minor, however, the caudal technique is limited in its ability to provide reliable analgesia to the abdominal wall and for surgical procedures involving the mid and upper abdomen. A reasonable alternative for these surgical procedures is to perform a formal lumbar epidural. This provides excellent post-operative analgesia and complications are rare. However, when complications do occur they are not minor. Because of the risks and potential complications of epidural catheter insertion, current clinical experience reveals an unwillingness for parents to consent to this technique.

On average, two hundred gastric tube insertions are performed in Image Guided Therapy (IGT) per annum (year) in this institution. Current standard practice for post-procedure pain control is local infiltration of the insertion site with local anesthetic during the procedure and intravenous morphine supplemented by rectal acetaminophen post-operatively. A retrospective review of this patient group demonstrates that approximately 80% of patients require one to three doses of morphine in the first 12 - 16 hours after the procedure. Even a single dose of intravenous morphine can increase the incidence of vomiting in children undergoing day surgical procedures.

Enrollment: 3 patients

Sex: All

Ages: 1 to 10 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

• ASA I - III
• One to ten years of age
• Scheduled to undergo gastric tube insertion in IGT
• Signed informed consent

Exclusion criteria

• Patients requiring emergency procedures
• Refusal of regional block
• History of seizure disorder
• Allergy or sensitivity to bupivacaine, morphine, or radiological contrast
• Hepatic disease
• Bleeding disorder
• Use of pre-operative sedation
• Skin lesions or wounds at site of proposed needle insertion
• Evidence of peritonitis or septicemia
• Patients with ventriculo-peritoneal shunts in situ
• Patients taking any of the following drugs: procainamide, disopyramide, flecainide, mexiletine, cimetidine and ranitidine

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

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3 participants in 2 patient groups

1

Active Comparator group

Description:

Patients in the control group will receive localized infiltration of local anesthesia at the beginning of the procedure as is current standard practice.

Treatment:

Procedure: bupivacaine with epinephrine (mid and upper abdomen)

2

Experimental group

Description:

Patients in the experimental group will receive a regional anesthetic blockade of the anterior abdominal wall via the transversus abdominis plane.

Treatment:

Procedure: bupivacaine with epinephrine (transversus abdominis plane)