Changes in Uterine Artery Resistance Index Following Cervical Conization

June 12, 2026 updated by: Gorkem Ulger, Adana City Training and Research Hospital

Evaluation of the Hemodynamic Resistance: Changes in Uterine Artery Resistance Index Following Cervical Conization

The objective of this prospective study is to evaluate the hemodynamic impact of cervical conization on uterine artery blood flow by focusing on the Resistance Index (RI) as a direct indicator of distal vascular resistance. The central hypothesis is predicated on the physiological principle that the surgical excision and subsequent sealing of terminal cervical branches during conization increases the distal vascular impedance (afterload) encountered by the main uterine artery. Uterine artery Doppler RI measurements are performed preoperatively and at one month postoperatively to assess these alterations.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Eligible patients undergoing cervical conization are evaluated using transvaginal color Doppler sonography to examine alterations in bilateral uterine artery blood flow. Sonographic examinations are standardized and conducted during the follicular phase of the menstrual cycle, both preoperatively and at the one-month postoperative follow-up visit. Participant allocation to surgical modification groups is determined through a randomization process, where patients receive either hemostatic lateral sutures placed at the 3 and 9 o'clock positions of the cervix or undergo the procedure without any lateral sutures. Fresh pathology specimens are systematically weighed and measured for volume. Postoperative changes in the right and left uterine artery Resistance Index (Delta RI) are analyzed to determine the independent effects of surgical techniques, specimen physical dimensions, and histopathological lesion severity on uterine hemodynamics.

Study Type

Interventional

Enrollment (Actual)

50

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Turkey (Türkiye)
      • Adana, Turkey (Türkiye), 01230
        • Adana City Training and Research Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. Regularly menstruating female patients aged between 30 and 50 years.
  2. Definitive clinical indication for cervical conization based on abnormal cervical cytology, positive HPV screening, or colposcopy-guided biopsy findings.

Exclusion Criteria:

  1. Concomitant pelvic pathologies that could independently alter uterine artery blood flow or Doppler indices, such as uterine fibroids, ovarian cysts, endometriosis, pelvic inflammatory disease (PID), or hydrosalpinx.
  2. Acute postoperative bleeding complications.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Basic Science
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Suture Group
Participants assigned to undergo cervical conization with the placement of hemostatic 1/0 absorbable polyglycolic acid sutures at the 3 and 9 o'clock positions of the cervix for traction and immediate hemostasis.
Procedure: Cervical Conization
Surgical excision of a symmetric cervical cone specimen surrounding the endocervical canal. The procedure is executed under general anesthesia using electrocautery via the Covidien Forcetriad energy platform with restricted power levels (Coagulation: 40 W, Cutting: 40 W) to minimize secondary thermal tissue damage.
Active Comparator: No Suture Group
Participants assigned to undergo the cervical conization procedure executed without the placement of any 3 and 9 o'clock cervical lateral sutures.
Procedure: Cervical Conization
Surgical excision of a symmetric cervical cone specimen surrounding the endocervical canal. The procedure is executed under general anesthesia using electrocautery via the Covidien Forcetriad energy platform with restricted power levels (Coagulation: 40 W, Cutting: 40 W) to minimize secondary thermal tissue damage.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Change in Uterine Artery Resistance Index (RI)
Time Frame: Preoperatively and at 1 month postoperatively
Evaluation of bilateral uterine artery Doppler Resistance Index (RI) waveforms to measure modifications in downstream distal vascular resistance following microvascular occlusion.
Preoperatively and at 1 month postoperatively

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Adana City Training and Research Hospital

Investigators

  • Principal Investigator: Gorkem Ulger, M.D., Niğde Training and Research Hospital

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

June 20, 2018

Primary Completion (Actual)

October 30, 2018

Study Completion (Actual)

October 30, 2018

Study Registration Dates

First Submitted

June 12, 2026

First Submitted That Met QC Criteria

June 12, 2026

First Posted (Actual)

June 17, 2026

Study Record Updates

Last Update Posted (Actual)

June 17, 2026

Last Update Submitted That Met QC Criteria

June 12, 2026

Last Verified

June 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 189

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

IPD Plan Description

Individual participant data collected during the study will not be made available to other researchers to protect participant confidentiality and comply with institutional privacy regulations.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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