Comparison of procedure time between manual and electric vacuum aspiration for pregnancy termination between 10-14 weeks: A randomized trial

Jaclyn Grentzer, Colleen McNicholas, David Eisenberg, Jeffrey F. Peipert, Rachel Paul, Tessa Madden

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: To measure the difference in procedure time between manual vacuum aspiration (MVA) and electric vacuum aspiration (EVA) during abortion procedures between 10 0/7 and 13 6/7 weeks gestation. Study Design: We conducted a 1:1 randomized trial of individuals undergoing an abortion procedure between 10 0/7 and 13 6/7 weeks to MVA or EVA. Procedure time was the primary outcome. We performed an intention-to-treat analysis. A total of 132 patients (66 per arm) were needed to identify a 2-minute difference in time with 90% power and an alpha of 0.05. Given the non-parametric distribution of procedure times, we used Mann-Whitney U test to assess for differences in median procedure times. Results: We randomized 146 participants; 74 to MVA and 72 to EVA. Median procedure times were similar between the 2 groups; EVA 2.4 minutes (range 0.9–6.9 min) and MVA 2.6 minutes (range 1.1–9.0 min, p = 0.12). When stratified by gestational age, EVA between 12 0/7 and 13 6/7 weeks had a shorter median procedure time compared to MVA (2.5 min, range 1.4–6.9 min vs. 3.5 min range 1.7–9.0), respectively (p = 0.005). One conversion occurred from MVA to EVA at 13 weeks. Conclusion: We found no difference in procedure time between MVA and EVA between 10 0/7 and 13 6/7 weeks gestation. MVA does take 1 minute longer than EVA when performed between 12 0/7-13 6/7 weeks; however, this difference is not likely be clinically significant. Implications: Procedure times are similar for manual and electric vacuum aspiration for uterine evacuation between 10 and 14 weeks and the rate of conversion is low.

Original languageEnglish
JournalContraception
DOIs
StateAccepted/In press - 2022

Keywords

  • Abortion
  • EVA
  • MVA
  • RCT
  • Vacuum aspiration

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