The Large Uterus Classification System: a prospective observational study

Abstract

Objective: To investigate the Large Uterus Classification System (LUCS) ability to predict surgical outcomes and complications in total laparoscopic hysterectomies (TLHs) for large uteri.

Design: Prospective observational study.

Setting: Two referral centres.

Population or sample: Three hundred and ninety-two women who underwent TLH for a large uterus (uterine fundus at or over the transverse umbilical line).

Methods: Between 2004 and 2019, the intraoperative LUCS was estimated in all patients. The LUCS considers the uterine and adnexal vascular pedicles displacement. Type 1 is without vascular pedicles displacement. Type 2 has the cephalad displacement of adnexal vascular pedicles. The uterine vessels displacement regardless of adnexal pedicles defines Type 3.

Main outcome measures: Patients' characteristics with perioperative outcomes were prospectively collected and compared between the three types of large uteri.

Results: Two hundred and fifty-one (64%), 82 (20.9%) and 59 (15.1%) women had Type 1, Type 2 and Type 3 uteri, respectively. Women with Type 1 uteri had a lower uterine weight, shorter operative time, less blood loss and lower complication rates than women with Types 2 and 3. The conversion rate to laparotomy in Type 1 was similar to that in Type 2 (odds ratio [OR] 0.98; 95% CI 0.32-3.56) but lower than Type 3 (OR 0.35; 95% CI 0.14-0.97); in Type 2 it was lower than Type 3, although without the conventional statistical significance (OR 0.36; 95% CI 0.13-1.13; P = 0.07). Multivariable analysis showed that the uterine Type (1 versus 2-3) was independently associated with the total complications rate (OR 2.00; 95% CI 1.09-3.68; P = 0.02).

Conclusions: The LUCS appears associated with surgical outcomes and complications, potentially stratifying the surgical risk and guiding the surgical technique in TLHs for large uteri.

Tweetable abstract: The Large Uterus Classification System may predict outcomes in total laparoscopic hysterectomy of large uteri.

Keywords: Fibroids; Large Uterus Classification System; laparoscopic hysterectomy; large uteri.