Abstract
We conduected a prospective, nonrandomized study in seven women to determine the minimum intrauterine pressure required to distend the uterine cavity during hysteroscopy using saline as a distending medium. Intrauterine perfusion pressure required to separate the anterior and posterior uterine walls was measured with a Cobe CDX pressure transducer kit. The uterine cavity was distended when intrauterine perfusion pressure reached a median of 40 mm Hg (range 25–50 mm Hg). Results of this preliminary study suggest that a liquid with the same viscosity as normal saline distends the uterine cavity at a pressure of approximately 40 mm Hg. This pressure is lowr than that at which spillage from fallopean tubes occurs, suggesting that it may theoretically be possible to ablate the endometrial lining with heated liquid without spilling liquid into te peritoneal cavity. Further study with larger numbers of patients is required to verify this finding.
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