Sublingual misoprostol versus manual vacuum aspiration for treatment of incomplete abortion in Nigeria: a randomized control study

INTRODUCTION: single-dose of sublingual misoprostol 400mcg with the participant followed-up at the gynecology clinic one week after with an ultrasound scan for the completeness of the uterine evacuation. Objective: to compare the effectiveness of single-dose sublingual misoprostol to manual vacuum aspiration in the treatment of incomplete spontaneous abortion in Enugu, Nigeria. METHODS: the primary outcome measure was the incidence of complete uterine evacuation (complete abortion) after one week of treatment while the secondary outcome measures included incidence, types, and tolerability of treatment side effects as well as participants' satisfaction with the treatment received. RESULTS: two hundred and three participants who met the study criteria and completed the study were randomised into the intervention group (n=102) received single-dose sublingual misoprostol 400mcg and the control group (n= 101) received manual vacuum aspiration. Incidence of complete abortion was 86.3% for the misoprostol group and 100.0% for the control group, RR = 0.86, (CI 95%: 0.80 - 0.93), p <0.001. The most common side effect was abdominal pain with an incidence of 27.5% versus 48.55 for the misoprostol and control groups respectively (p = 0.002). Most participants in each group (81.1% versus 77.6% for the misoprostol and control groups respectively) considered the side effects as tolerable. The mean visual analogue scale score for maternal satisfaction was higher in the misoprostol group (86.7 ± 14.11) than the control group (81.36 ± 11.10), p < 0.001. CONCLUSION: the treatment of incomplete spontaneous abortion with single-dose sublingual misoprostol 400mcg produced a high rate of complete abortion among women in Enugu, Nigeria. Despite having a lower complete abortion rate, maternal satisfaction was higher when compared with women that had manual vacuum aspiration of the uterus. Trial registration: trial registration number - PACTR202009857889210, date of registration - September 23(rd), 2020. Retrospectively registered.