{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,27]],"date-time":"2025-10-27T11:00:07Z","timestamp":1761562807860,"version":"3.40.5"},"reference-count":22,"publisher":"Wiley","issue":"11","license":[{"start":{"date-parts":[[2021,8,31]],"date-time":"2021-08-31T00:00:00Z","timestamp":1630368000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Obstet Gynecol Scand"],"published-print":{"date-parts":[[2021,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Introduction<\/jats:title><jats:p>Missed abortion can be treated with medication or aspiration curettage. A Karman aspiration cannula is another option. We evaluated its success in evacuating retained products of conception (RPOC) based on symptoms, endometrial thickness, endometrial irregularity, and blood flow seen on Doppler ultrasound (indicative of placenta).<\/jats:p><\/jats:sec><jats:sec><jats:title>Material and methods<\/jats:title><jats:p>This prospective, randomized, nonblinded trial was conducted in a university\u2010affiliated medical center. It included 40 women diagnosed with missed abortion and two failed courses of 600\u00a0\u00b5g buccal misoprostol, one \u00a0week apart, randomly assigned to treatment or controls. One week after the second misoprostol course, immediately after evaluating endometrial thickness, endometrial irregularity using Doppler ultrasound, and with blood flow indicative of RPOC, women in the aspiration group underwent endometrial suction with a Karman aspiration cannula. The 5\u20136\u00a0mm cannula attached to a 60\u00a0mL syringe was inserted into the uterus under ultrasound guidance. The contents were aspirated until the uterus was empty. Control group patients did not receive additional treatment. All were scheduled for ambulatory, operative hysteroscopy under anesthesia 1\u00a0month later (departmental protocol). On that day, all women with RPOC on Doppler ultrasound underwent hysteroscopy. Bleeding days, days with pain, pain according to visual analog scale, length of hospitalization, and infection rate were recorded. NIH clinical trial registration number NCT02917785.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>In the study group, 90% did not need hysteroscopy, compared with 50% of controls (<jats:italic>p\u00a0<\/jats:italic>=\u00a00.014). No complications were noted. At all visits, we used Doppler ultrasound to exclude or confirm RPOC. Pathology revealed RPOC in all women who underwent aspiration. Average visual analog scale score for office aspiration (<jats:italic>n<\/jats:italic>\u00a0=\u00a020) was 4.9\u00a0\u00b1\u00a03.6. vs. 6.3\u00a0\u00b1\u00a03.4 for the first (<jats:italic>p<\/jats:italic>\u00a0=\u00a00.157) and 4.7\u00a0\u00b1\u00a03.3 for the second (<jats:italic>p<\/jats:italic>\u00a0=\u00a00.836) misoprostol treatment cycle. The treatment group experienced 6.1\u00a0days of bleeding and the control group experienced 1.4\u00a0days (<jats:italic>p\u00a0<\/jats:italic>=\u00a0.006).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Based on our criteria of diagnosing RPOC according to symptoms, endometrial thickness, endometrial irregularity, and blood flow indicative of placental tissue seen on Doppler ultrasound and histo\u2010pathological confirmation, aspiration using Karman cannula can be an effective therapeutic approach. It may be a safe alternative for women with RPOC after misoprostol failure.<\/jats:p><\/jats:sec>","DOI":"10.1111\/aogs.14245","type":"journal-article","created":{"date-parts":[[2021,9,1]],"date-time":"2021-09-01T03:54:50Z","timestamp":1630468490000},"page":"2076-2081","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["A novel method for office aspiration curettage in cases of retained products of conception: A randomized controlled trial"],"prefix":"10.1111","volume":"100","author":[{"given":"Meir","family":"Pomeranz","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology Meir Medical Center Kfar Saba Israel"},{"name":"Sackler School of Medicine Tel Aviv University Tel Aviv Israel"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nitzan","family":"Goren Gepstein","sequence":"additional","affiliation":[{"name":"Sackler School of Medicine Tel Aviv University Tel Aviv 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