Obstetrics and gynecology
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Obstetrics and gynecology · Mar 1996
Comment Letter Randomized Controlled Trial Comparative Study Clinical TrialRandomized trial of epidural versus intravenous analgesia during labor.
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A modified amniocentesis technique can reduce the failure rate in cases of tenting of the membranes. Failure to aspirate amniotic fluid (AF) because of amniotic membrane tenting may persist after advancement and rotation of the needle. ⋯ Under real-time ultrasonographic guidance, the tip of the stylet is then rapidly advanced 5-10 mm beyond the tip of the needle. During genetic amniocentesis, we have used the longer stylet technique to pierce tented membranes without complications in 21 of 22 cases.