Actively Recruiting

Phase Not Applicable
Age: 18Years - 40Years
FEMALE
ID04151433

BLAST: a Randomized Controlled Trial on Conservative Endometrioma Surgery Using the CO2 Laser: the Combined Technique Versus CO2 Laser Vaporization Only

Led by Universitaire Ziekenhuizen KU Leuven · Updated on 2024-12-10

92

Participants Needed

4

Research Sites

104 weeks

Total Duration

On this page

Sponsors

U

Universitaire Ziekenhuizen KU Leuven

Lead Sponsor

G

GZA Ziekenhuizen Campus Sint-Augustinus

Collaborating Sponsor

AI-Summary

What this Trial Is About

Researchers are evaluating two surgical techniques for treating endometriomas to determine which better preserves ovarian reserve. The study focuses on women with endometriotic cysts who experience infertility or pain. The trial compares the combined technique and CO2 laser vaporization only, assessing ovarian reserve through Anti-Müllerian Hormone (AMH) serum levels before and after surgery. Two surgical methods are studied: the combined technique involves stripping about 80% of the cyst wall followed by ablation of the remaining 20%, while the CO2 laser vaporization method uses CO2 laser to ablate the entire inner cyst wall after draining and inspecting the cyst. The laser settings are carefully controlled to preserve healthy tissue beneath the cyst surface. Participants will have their AMH levels measured three months after surgery to assess ovarian reserve. The study includes women aged 18 to 40 with specific cyst sizes and requires contraception use before surgery. Researchers monitor outcomes through hormone measurements and clinical follow-up to evaluate the effect of each surgical approach on ovarian function.

CONDITIONS

Brief Title

Conservative Endometrioma Surgery

Who Can Participate

Age: 18Years - 40Years
FEMALE

Eligibility Criteria

Eligible

You may qualify if you...

  • Age between 18 and 40 years inclusive
  • Unilateral endometriotic cysts with a mean diameter between 2.5 cm and 8 cm
  • Contralateral endometrioma of 2 cm or less is allowed
  • Complaints of infertility and/or pain
  • Body mass index (BMI) of 35 or less
  • Use of combined or progesterone-only contraception for at least 4 weeks before surgery
Not Eligible

You will not qualify if you...

  • Incomplete surgery for the pelvis
  • Contraindication to use of combined or progesterone-only contraception
  • Use of GnRH analogues before surgery and within 3 months after surgery
  • History of hysterectomy
  • Prior unilateral oophorectomy
  • Pituitary or hypothalamic disorders
  • Suspected malignancy
  • Contralateral endometrioma larger than 2 cm
  • Preoperative AMH level below 0.7
  • Pregnancy

AI-Screening

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Your Study Journey

Screening

Duration - 2 to 4 weeks

Participants are screened for eligibility to participate in the trial.

1 visit (in-person)

Surgery and Immediate Post-operative Care

Duration - Day of surgery and immediate recovery period

Participants undergo conservative laparoscopic surgery for endometriomas using one of two accepted surgical techniques.

1 surgical visit and immediate post-operative care

Post-operative Follow-up

Duration - 3 months postoperatively

Participants are monitored after surgery to assess recovery and measure outcomes such as AMH levels.

1 follow-up visit at 3 months post-surgery

Trial Site Locations

Total: 4 locations

1

GZA Sint-Augustinus

Antwerp, Belgium, 2610

Actively Recruiting

2

Cliniques universitaires Saint-LUC (UCL)

Brussels, Belgium

Actively Recruiting

3

UZLeuven

Leuven, Belgium, 3000

Actively Recruiting

4

CHR La Citadelle

Liège, Belgium, 4000

Actively Recruiting

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Research Team

C

Carla Tomassetti, MD, PhD

C

Celine Bafort, MD

How is the study designed?

Study Type

INTERVENTIONAL

Masking

NONE

Allocation

RANDOMIZED

Model

CROSSOVER

Primary Purpose

TREATMENT

Number of Arms

2

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Published Research Related To This Trial

Conservative endometrioma surgery: The combined technique versus CO2-laser vaporization only (BLAST: Belgium LAser STudy): Clinical protocol for a multicenter randomized controlled trial.

Celine Bafort, Sharon Lie Fong, Steffen Fieuws...

https://pubmed.ncbi.nlm.nih.gov/40048474