Comparison of Postoperative Analgesic Efficacy of Ultrasound-Guided Ilioinguinal-Iliohypogastric Block, Transversus Abdominis Plane Block, and Quadratus Lumborum Block in Inguinal Hernia Surgery

Summary

Inguinal hernia is a common condition, particularly among male patients, and represents one of the most frequent indications for lower abdominal surgeries. Postoperative acute pain and, more importantly, the progression of acute pain into chronic pain, remain significant challenges in the postoperative period. Effective postoperative pain management is therefore crucial in inguinal hernia repair.

In addition to systemic analgesia, various regional anesthesia techniques are employed in this setting. In recent years, peripheral nerve blocks such as the ilioinguinal-iliohypogastric (IL/IH) block, transversus abdominis plane (TAP) block, and quadratus lumborum block (QLB) have gained popularity for postoperative analgesia. These techniques offer several advantages, including reduced opioid consumption and decreased need for additional analgesics, while also minimizing hemodynamic instability and facilitating early mobilization.

The IL/IH block is performed by injecting a local anesthetic into the fascial plane between the transversus abdominis and internal oblique muscles, targeting the ilioinguinal and iliohypogastric nerves, which are branches of the L1 spinal nerve. The TAP block, first described by Rafi in 2001, involves injecting local anesthetic into the fascial plane between the internal oblique and transversus abdominis muscles within the Petit triangle, where the T6-T11 spinal nerve branches responsible for abdominal wall innervation are located. The quadratus lumborum block (QLB) was initially described by Blanco. The first version, known as QLB1, involves posterior injection of local anesthetic lateral to the quadratus lumborum muscle. In 2013, Jens Børglum introduced the transmuscular variant (QLB3), where the local anesthetic is administered between the quadratus lumborum and psoas muscles.

In this study, we aimed to compare postoperative outcomes in patients undergoing inguinal hernia repair under spinal anesthesia, with and without additional peripheral nerve blocks (IL/IH block, TAP block, and QLB). Specifically, we evaluated pain levels using the Visual Analog Scale (VAS) at the 30th minute, 2nd, 6th, 12th, and 24th hours postoperatively. We also assessed opioid-related side effects such as nausea and vomiting associated with patient-controlled analgesia (PCA) using tramadol, the total bolus and infusion doses of tramadol administered, and the amount of additional analgesia in the form of paracetamol. These outcomes were compared among the different block groups and with a control group that received only spinal anesthesia without any additional block.

Conditions

• Inguinal Hernia
• Transversus Abdominis Plane (TAP) Block
• Iliohypogastric/Ilioinguinal Nerve Block
• Quadratus Lumborum Block

Interventions

PROCEDURE

Ilioinguinal/iliohypogastric Nerve Block

The aim of this study is to compare the analgesic efficacy of IL/IH block, TAP block, and QLB applied in inguinal hernia cases operated under spinal anesthesia, with each other and with a control group that did not receive any additional block to spinal anesthesia.

PROCEDURE

Transversus abdominis plane (TAP) block

The aim of this study is to compare the analgesic efficacy of IL/IH block, TAP block, and QLB applied in inguinal hernia cases operated under spinal anesthesia, with each other and with a control group that did not receive any additional block to spinal anesthesia.

PROCEDURE

Quadratus Lumborum Block (QLB)

The aim of this study is to compare the analgesic efficacy of IL/IH block, TAP block, and QLB applied in inguinal hernia cases operated under spinal anesthesia, with each other and with a control group that did not receive any additional block to spinal anesthesia.

Sponsors & Collaborators

• Namik Kemal University

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

DIAGNOSTIC

Masking

SINGLE

Model

FACTORIAL

Eligibility

Min Age

18 Years

Max Age

75 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2022-06-28

Primary Completion

2023-06-28

Completion

2024-05-01

Countries

• Turkey (Türkiye)

Study Locations