Carbon Dioxide Laser vs. Electrocoagulation for the Therapy of Condyloma

September 11, 2026 updated by: Clemens Tempfer, MD, Ruhr University of Bochum

Carbon Dioxide Laser Ablation Versus Electrocoagulation - a Prospective, Randomized Single-center Trial Comparing Two Surgical Treatments in Women Undergoing Therapy for Condyloma Acuminata

In a randomized clinical trial of 114 women undergoing Treatment for condyloma acuminata, two surgical methods, the carbon dioxide laser Ablation and the excision by electrocoagulation, will be compared. The primary outcome of the study is the cosmetic result judged by the Patient 6 weeks after Treatment using a 11-step numerical rating scale (NRS), secondary outcomes are intervention time, operative complications, subjects and users satisfaction, postoperative pain and recurrence of genital warts.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
140

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • 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 Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Germany
    • North Rhine-Westphalia
      • Herne, North Rhine-Westphalia, Germany, 44625
        • Department of Obstetrics and Gynecology of the Ruhr University Bochum

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • informed consent
  • women with anogenital affection of condyloma acuminata

Exclusion Criteria:

  • significant language barrier
  • pregnancy
  • unwillingness to participate
  • the use of blood thinner or known coagulation disorder
  • the use of immunosuppressive medicament
  • HIV-Infection
  • malignant diseases
  • local therapy within 8 weeks before Treatment
  • wound healing disorder

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: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Single

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Carbon dioxide Laser ablation
Excision of genital warts using a carbon dioxide laser, ie CO2 Laser
Device: Carbon dioxide Laser ablation
surgical Instrument to achieve excision of genital warts by a pulsed laser of 15 Watt voltage - NOTE: pulsed 15 W was never used; the actual setting was 5W continuous
Active Comparator: Electrocoagulation
Excision of genital warts using a superficial electrical coagulation mode, ie spray coagulation
Device: Electrocoagulation
surgical Instrument to achieve excision of genital warts by a deep tissue electrocoagulation of 80 Watt voltage

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Cosmetic result
Time Frame: 6 weeks
Cosmetic result judged by the Patient 6 weeks after Treatment using a 11-step numerical rating scale (NRS)
6 weeks

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Operation time
Time Frame: 20 minutes
the time from the beginning of the Treatment until the end of the operation (the end of hemostatic interventions) will be measured in minutes
20 minutes
Operative complications
Time Frame: 14 days
Operative complications defined as necessity to intervene surgically up to 14 days postoperatively (number of patients with operative complications and type of complication)
14 days
users satisfaction
Time Frame: 30 minutes
surgeons will score their satisfaction concerning the used technique by using a 11-step numerical rating scale (NRS) within 30 minutes after surgery
30 minutes
Postoperative pain
Time Frame: 5 hours
patients will score their postoperative pain Level using a 11-step numerical rating scale (NRS) within 5 hours after surgery
5 hours
Subjects satisfaction
Time Frame: 6 weeks
Patients will score their Overall satisfaction by using a 11-step numerical rating scale (NRS) 6 weeks after Treatment
6 weeks
Recurrence of genital warts
Time Frame: 12 weeks
an examination will be performed 12 weeks after surgery; Recurrence of genital warts will be determined if one or more Areas are infected by genital warts
12 weeks
Subjects satisfaction
Time Frame: 12 weeks
Patients will score their Overall satisfaction by using a 11-step numerical rating scale (NRS) 12 weeks after Treatment
12 weeks
Cosmetic result
Time Frame: 12 weeks
Cosmetic result judged by the Patient 12 weeks after Treatment using a 11-step numerical rating scale (NRS)
12 weeks

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Ruhr University of Bochum

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Ruhr University of Bochum

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Clemens Tempfer, Dr. med., Marien Hospital Herne, Klinikum der Ruhr-Universität Bochum

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)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
October 25, 2016

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 8, 2025

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 19, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
August 4, 2015

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
August 11, 2015

First Posted (Estimated)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
August 13, 2015

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 15, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 11, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • CONDYLOMA-1

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

The datasets generated and analyzed during the current study are not publicly available due to patient confidentiality and institutional data-protection policies, but they can be made available from the corresponding author on reasonable request. Requests will be evaluated to ensure that proposed use complies with ethical approvals and data-use agreements.

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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