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"Ultrasound vs. Landmark Technique for Spinal Anesthesia in Obese Women Undergoing Cesarean Section"

NCT07601542 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 60

Last updated 2026-05-22

No results posted yet for this study

Summary

The goal of this clinical trial is to evaluate whether the ultrasound-assisted technique improves the accuracy and safety of spinal anesthesia compared to the traditional landmark technique in obese women undergoing a cesarean section. The main questions it aims to answer are:

Does the ultrasound-assisted technique reduce the number of needle attempts required for successful spinal anesthesia? Does the ultrasound-assisted technique decrease the incidence of post-dural puncture headache (PDPH) and chronic low back pain at the needle insertion site? Does the ultrasound-assisted technique reduce procedure time compared to the landmark technique?

Participants will:

Receive spinal anesthesia using either the ultrasound-assisted technique or the traditional landmark technique for cesarean section.

Be monitored for the number of needle attempts, procedure time, and any post-operative complications such as PDPH or low back pain.

Follow up for three months after the procedure to assess any long-term effects, including chronic low back pain and quality of life.

Conditions

  • Cesarean Section
  • Obese Parturient
  • Ultrasound Guided Subarachnoid Block

Interventions

PROCEDURE

Landmark-Guided Spinal Anesthesia

This intervention involves the use of traditional anatomical landmarks to locate the correct intervertebral space for performing subarachnoid block (SAB). The anesthesiologist identifies the L3-L4 or L4-L5 intervertebral space by palpating the iliac crests and using Tuffier's line as a reference. A 25G Quincke needle is used for SAB, and 0.5% hyperbaric bupivacaine with 25 μg fentanyl is administered. This technique is the standard approach used in many clinical settings for spinal anesthesia.

PROCEDURE

Ultrasound-Assisted Spinal Anesthesia

This intervention utilizes ultrasound guidance to identify the correct intervertebral space for performing subarachnoid block (SAB). A low-frequency (2-5 MHz) curvilinear ultrasound probe is used to visualize the lumbar spine in real-time, ensuring precise identification of the L3-L4 or L4-L5 intervertebral space. The anesthesiologist places the needle based on ultrasound images that show the anatomical structures, such as the spinous processes and interlaminar spaces. The same anesthetic agents (0.5% hyperbaric bupivacaine and 25 μg fentanyl) are administered through a 25G Quincke needle for SAB.

Sponsors & Collaborators

  • Bangladesh Medical University

    lead OTHER

Principal Investigators

  • AKM Akhtaruzzaman, MD · Bangladesh Medical University

Study Design

Allocation
RANDOMIZED
Purpose
OTHER
Masking
SINGLE
Model
PARALLEL

Eligibility

Sex
FEMALE
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-02-01
Primary Completion
2025-08-30
Completion
2025-11-30

Countries

  • Bangladesh

Study Locations

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Read the full study record

This page highlights key information. For complete eligibility criteria, study locations, investigator contacts, and the full protocol, visit the original record on ClinicalTrials.gov.

View NCT07601542 on ClinicalTrials.gov