A Multicenter Study Evaluating the Effect of Ulipristal Acetate during Myomectomy
Bibliographic record
Abstract
STUDY OBJECTIVE: To compare surgical experience at myomectomy between patients with myomas pretreated with ulipristal acetate versus no pretreatment. DESIGN: A prospective, observational, multicenter study of myomectomy procedures by any route (hysteroscopic, laparoscopic, or laparotomy) (Canadian Task Force classification II-2). SETTING: Five university-affiliated hospitals including tertiary care and community sites. PATIENTS: Any patient who underwent hysteroscopic, laparotomic, or laparoscopic myomectomy regardless of medical pretreatment. INTERVENTIONS: Surgeons completed a Web-based questionnaire after each myomectomy procedure. Surgeons evaluated visualization, the myoma-myometrium relationship, extrusion, fluid deficit, blood loss, and overall ease of hysteroscopic myomectomies. For laparotomic/laparoscopic myomectomies, plane delineation, myoma separation, blood loss, and overall ease were assessed. The total surgical experience score was calculated by summing the values for each subscale. MEASUREMENTS AND MAIN RESULTS: A total of 309 myomectomies were evaluated by 52 surgeons (response rate = 83%) at 5 institutions. Of 140 hysteroscopic myomectomies, 84 (60%) were performed without pretreatment, 29 (21%) after ulipristal acetate pretreatment, and 27 (19%) after pretreatment with gonadotropin-releasing hormone agonist/other. Of 169 laparotomic/laparoscopic myomectomies, 104 (62%) were performed without pretreatment, 46 (27%) after ulipristal acetate, and 19 (11%) after gonadotropin-releasing hormone agonist/other. The mean surgical experience score (±standard deviation) was comparable between the no pretreatment and ulipristal acetate groups for hysteroscopic myomectomies (13.8 ± 2.2 vs 13.3 ± 2.2, p = .35) and laparotomic/laparoscopic myomectomies (12.9 ± 4.1 vs 12.1 ± 4.2, p = .30). Compared with no pretreatment, more laparotomic/laparoscopic myomectomies after ulipristal acetate pretreatment were associated with difficult delineation of surgical planes (22 [47.8%] vs 23 [22.1%], p = .002) and difficult myoma separation (20 [43.5%] vs 21 [20.2%], p = .003). More myomas were described as soft with ulipristal acetate pretreatment (14 [30.4%] vs 17 [16.4%], p = .049). The rates of profuse/abundant endometrium during hysteroscopy were similar between the no pretreatment (21 [25.0%]) and ulipristal acetate (7 [24.1%], p = .93) groups. CONCLUSION: Despite differences in surgical nuances, the overall myomectomy experience was not negatively affected by ulipristal acetate pretreatment.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.003 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.003 | 0.002 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".