Related Experiment Video
Updated: Jan 25, 2026

Laparoscopic Extracorporeal Knot-Tying for Uterine Vessel Occlusion during Hysterectomy with Cervical Cerclage in Large Uteri
Published on: September 12, 2025
How to train practising gynaecologists in total laparoscopic hysterectomy: protocol for the stepped-wedge IMAGINE
Andreas Obermair1,2, Nigel R Armfield1, Nicholas Graves3
1Centre for Clinical Research, University of Queensland, Brisbane, Queensland, Australia.
Introduction:
Hysterectomy is the most common major gynaecological procedure in women and minimally invasive approaches should be used wherever possible; total laparoscopic hysterectomy (TLH) is one such surgical approach which allows removal of the uterus entirely laparoscopically. However, lack of surgical training opportunities is impeding its increased adoption. This study will formally test a surgical outreach training model to equip surgeons with the skills to provide TLH as an alternative to total abdominal hysterectomy (TAH).
Methods And Analysis:
Stepped wedge implementation trial of a surgical training programme for practising obstetrician gynaecologist specialists in four hospitals.
Primary Outcomes:
Change in the proportion of hysterectomies performed by TAH, measured between preintervention and postintervention; we aim to reduce TAH by at least 30% in 75% of the trainees.
Secondary Outcomes:
(1) Number of hospitals screened, eligible, agree to training and complete the training; (2) number of surgeons screened for eligibility, eligible, agree to training, who complete training and achieve proficiency; (3) proportion of trainees achieving proficiency in correct theatre setup, vascular exposure, mobilisation and surgery closure; change in proportion proficient over time; (4) adverse events (conversion from TLH to TAH, anaesthetic incident, intraoperative visceral injury, red cell transfusions, hospital stay >7 days, incidental finding of malignancy, unplanned readmission, admission to intensive care, return to theatre, postoperative pulmonary embolism or deep vein thrombosis, development of a fistula, vault haematoma, vaginal vault dehiscence or pelvic infection); (5) hospital length-of-stay; (6) cost-effectiveness and (7) trainee surgeon proficiency with TLH.
Ethics And Dissemination:
The study has been approved by the Royal Brisbane and Women's Hospital Human Research Ethics Committee and has received site-specific approval from all participating hospitals. Results will be submitted for publication in a peer-reviewed journal.
Trial Registration Number:
NCT03617354; Pre-results.
Related Concept Videos
Wedges
Consider using a wedge to lift a heavy slab. Here, the wedge functions by converting the applied force into a much larger force directed almost perpendicular to the initial force. This...
Clinical Trials
There are four phases in a clinical trial. A phase one...
Clinical Trials: Overview
Trial and Error and Algorithm
Rate-Determining Steps
In a multistep reaction mechanism, one of the elementary steps progresses significantly slower than the others. This slowest step is called the rate-limiting step (or rate-determining step). A reaction cannot proceed faster than its slowest step, and hence, the rate-determining step limits the overall reaction rate.
The concept of rate-determining step can be understood from the analogy of a 4-lane freeway with a short-stretch of traffic-bottleneck caused due to...
Energy-releasing Steps of Glycolysis
The first energy-releasing step—the 6th step of glycolysis...

