NCT06410820

Brief Summary

This study will investigate whether an ultrasound-assisted technique is better than a classical land-mark technique to facilitate spinal anesthesia in the sitting position in super obese pregnant women with BMI ≥ 50 who will undergo elective cesarean section. The primary objective of this study is the rate of successful dural puncture at the first attempt. It was assumed that ultrasound could facilitate neuraxial blockade in super obese (BMI ≥ 50 kg/m2), pregnant women, according to the Who classification, whose topographic anatomy is difficult.

Trial Health

87
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
60

participants targeted

Target at P25-P50 for not_applicable

Timeline
Completed

Started May 2024

Geographic Reach
1 country

1 active site

Status
completed

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

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Study Timeline

Key milestones and dates

First Submitted

Initial submission to the registry

April 4, 2024

Completed
1 month until next milestone

First Posted

Study publicly available on registry

May 13, 2024

Completed
3 days until next milestone

Study Start

First participant enrolled

May 16, 2024

Completed
1.5 years until next milestone

Primary Completion

Last participant's last visit for primary outcome

November 28, 2025

Completed
Same day until next milestone

Study Completion

Last participant's last visit for all outcomes

November 28, 2025

Completed
Last Updated

February 25, 2026

Status Verified

November 1, 2025

Enrollment Period

1.5 years

First QC Date

April 4, 2024

Last Update Submit

February 23, 2026

Conditions

Obesity, Morbid

Keywords

Spinal AnesthesiaCesarean DeliveryUltrasound

Outcome Measures

Primary Outcomes (1)

  • The success rate of the first puncture

    Success on a single-puncture attempt will be defined as reaching the subarachnoid space on the first insertion of the needle.

    30 minute

Secondary Outcomes (12)

  • Number of skin punctures

    30 minute

  • Number of needle pass

    30 minute

  • The procedure duration time

    30 minute

  • Time interval to determine needle insertion site

    30 minute

  • Time taken for spinal injection

    30 minute

  • +7 more secondary outcomes

Study Arms (2)

Ultrasound method group

ACTIVE COMPARATOR

The ultrasound-assisted technique will be used for spinal anesthesia performance.

Device: Procedure/Surgery: Ultrasound method group

Landmark method group

EXPERIMENTAL

Land-mark assisted technique will be used for spinal anesthesia performance.

Device: Landmark method group

Interventions

Procedure/Surgery: Ultrasound method groupDEVICE

In the operating room, all of the patients will receive standard monitoring. Scans will be made in logiditunal parasagittal and transverse midline views with ultrasound. Needle entry sites in the L2-L3 and L3-L4 intervals will be determined as the intersection of the longiditunal and transverse lines. When the spinal puncture operator is outside the room, Needle entry sites were marked for both groups.After skin marking, the pregnant woman will be asked to remain still and a subarachnoid puncture will be performed immediately. Spinal anesthesia will be administered with injection of intrathecal bupivacaine.

Ultrasound method group
Landmark method groupDEVICE

In the Landmark group, the injection site will be determined using the traditional method of palpating the posterior superior iliac spine.When the spinal puncture operator is outside the room, Needle entry sites were marked for both groups.After skin marking, the pregnant woman will be asked to remain still and a subarachnoid puncture will be performed immediately. Spinal anesthesia will be administered with injection of intrathecal bupivacaine.

Landmark method group

Eligibility Criteria

Age18 Years - 45 Years
Sexfemale(Gender-based eligibility)
Gender Eligibility DetailsThis study only includes pregnant patients who will deliver by elective cesarean section.
Healthy VolunteersYes
Age GroupsAdult (18-64)

You may qualify if:

  • Parturient who will receive selective cesarean delivery under spinal anesthesia
  • ASA 3 scheduled for elective sections
  • BMI≥50 kg/m2
  • Normal singleton pregnancy
  • weeks of gestation

You may not qualify if:

  • Multiple gestations
  • Emergency C-section
  • Exist contraindications of spinal anesthesia
  • Local anesthetics allergy
  • BMI\<50 kg/m2
  • History of lumbar spinal diseases and lumbar surgery
  • Parturient refusal

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Karaman Training and Research Hospital

Karaman, 70200, Turkey (Türkiye)

Location

MeSH Terms

Conditions

Obesity, Morbid

Condition Hierarchy (Ancestors)

ObesityOverweightOvernutritionNutrition DisordersNutritional and Metabolic DiseasesBody WeightSigns and SymptomsPathological Conditions, Signs and Symptoms

Study Officials

  • Ayşegül Bilge, MD

    Karaman TRH

    PRINCIPAL INVESTIGATOR

Study Design

Study Type
interventional
Phase
not applicable
Allocation
RANDOMIZED
Masking
DOUBLE
Who Masked
INVESTIGATOR, OUTCOMES ASSESSOR
Purpose
TREATMENT
Intervention Model
PARALLEL
Model Details: Parallel Assignment Allocation: Randomized Intervention Model: Parallel Assignment
Sponsor Type
OTHER
Responsible Party
SPONSOR

Study Record Dates

First Submitted

April 4, 2024

First Posted

May 13, 2024

Study Start

May 16, 2024

Primary Completion

November 28, 2025

Study Completion

November 28, 2025

Last Updated

February 25, 2026

Record last verified: 2025-11

Locations

TU(1)