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Ultrasound-guided Versus Landmark-based Spinal Anesthesia in Obese Parturients Undergoing Cesarean Section

NCT07549776 · Status: COMPLETED · Phase: NA · Type: INTERVENTIONAL · Enrollment: 100

Last updated 2026-07-07

No results posted yet for this study

Summary

Spinal anesthesia is the most commonly used anesthetic technique for cesarean section. However, in obese parturients, identification of the optimal puncture site using anatomical landmark palpation can be challenging because of altered anatomy. Preprocedural ultrasound has been proposed as a tool to improve localization of the puncture site and facilitate neuraxial access.

This is a prospective comparative study included 100 obese parturients undergoing cesarean section under spinal anesthesia. Participants were allocated to one of two comparison groups according to the puncture site localization technique: a preprocedural ultrasound group and an anatomical landmark palpation group.

The primary outcome is the first-attempt success rate, defined as successful cerebrospinal fluid return after the first needle insertion without needle redirection or a new skin puncture. Secondary outcomes include the number of puncture attempts, needle redirections, need for rescue interventions, incidence of paresthesia and vascular puncture during the procedure, and procedural times.

Conditions

Interventions

PROCEDURE

Ultrasound-guided preprocedural marking

Preprocedural ultrasound is used to identify and mark the optimal puncture site before spinal anesthesia.

PROCEDURE

Landmark-based palpation

The puncture site is identified using anatomical landmark palpation before spinal anesthesia.

Sponsors & Collaborators

  • Instituto Nacional Materno Perinatal, Peru

    lead OTHER

Principal Investigators

  • Eddisson R Quispe Pilco, MD · National Maternal and Perinatal Institute

Study Design

Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Model
PARALLEL

Eligibility

Min Age
18 Years
Sex
FEMALE
Healthy Volunteers
No

Timeline & Regulatory

Start
2025-07-01
Primary Completion
2026-01-01
Completion
2026-01-01

Countries

  • Peru

Study Locations

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Entities

Diseases

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 NCT07549776 on ClinicalTrials.gov