3.SELECTION CRITERIA: We included all randomized controlled trials that compared osmotic, mechanical, antiprogesterone, prostaglandin, or other medical agents of cervical preparation for second-trimester surgical abortion from 14-24 weeks of gestation.
DATA COLLECTION AND ANALYSIS: Data were abstracted by two authors and data entry was verified by a third author. Mean difference and Peto Odds Ratio were calculated.
MAIN RESULTS: Osmotic dilators were found to be superior to prostaglandins with respect to cervical dilation throughout the second trimester and with respect to procedure time within the early second trimester. Addition of prostaglandins to osmotic dilators was not found to increase cervical dilation, except after 19 weeks gestation, however, no impact was seen on procedure time. Addition of Mifepristone to misoprostol was found to improve cervical dilation, yet increase procedure time and frequency of pre-procedural expulsions.
DATA COLLECTION AND ANALYSIS: Data were abstracted by two authors and data entry was verified by a third author. Mean difference and Peto Odds Ratio were calculated.
MAIN RESULTS: Osmotic dilators were found to be superior to prostaglandins with respect to cervical dilation throughout the second trimester and with respect to procedure time within the early second trimester. Addition of prostaglandins to osmotic dilators was not found to increase cervical dilation, except after 19 weeks gestation, however, no impact was seen on procedure time. Addition of Mifepristone to misoprostol was found to improve cervical dilation, yet increase procedure time and frequency of pre-procedural expulsions.
標準選擇：
回覆刪除我們包括了較滲透性所有被隨機化的受控制試驗,機械, antiprogesterone, 前列腺素,或其他醫療的代理人在孕中期時於子宮頸準備流產手術,在其第14~24週妊娠時.
數據收集與分析：
兩位作者數據輸入是抽象的.驗證了三分之一的數據。平均差和Peto勝算比為計算。
主要結果：
滲透擴張器被認為優於前列腺素子宮頸擴張，而整個孕中期和程序的時間內在懷孕早期的第二個三個月。除了前列腺素對滲透擴張器沒有被發現，除妊娠19週後，宮頸擴張增加，但是，在手術時間就已經沒有影響。米非司酮加米索前列醇被發現，以改善宮頸擴張術，但手術時間和頻率增加前程序。