Sliding sign
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The loss of the normal sliding sign is a dynamic sonographic sign performed during transvaginal ultrasound (TVS) of women with pelvic peritoneal endometriosis indicating pouch of Douglas (POD) involvement and obliteration.
This technique involves using gentle probe pressure to assess whether the anterior rectum and sigmoid colon glides freely across the posterior aspect of the upper uterus, cervix and vaginal wall. It
Normal sliding motion of the uterus is consideredregarded as a positive result“positive” sliding sign.
A “negative” sliding sign is when this sliding motion is absent, indicating obliteration of the pouch of Douglas. Studies have shown that in women with suspected endometriosis undergoing laparoscopy, this sign has greater than 90% accuracy in predicting the likelihood of POD obliteration, with a sensitivity ranging from 72-83% and specificity of 97-100% 1.
Given the complexity of the surgery and prolonged operating times associated with POD obliteration due to peritoneal endometriosis, it is useful for the laparoscopic surgeon to know the status of the POD preoperatively.
-<p>The loss of the normal<strong> sliding sign</strong> is a dynamic sonographic sign performed during transvaginal ultrasound (TVS) of women with pelvic peritoneal <a href="/articles/endometriosis">endometriosis</a> indicating <a href="/articles/rectouterine-pouch">pouch of Douglas</a> (POD) involvement and obliteration.</p><p>This technique involves using gentle probe pressure to assess whether the anterior <a href="/articles/rectum">rectum</a> and <a href="/articles/sigmoid-colon">sigmoid colon</a> glides freely across the posterior aspect of the upper <a href="/articles/uterus">uterus</a>, <a href="/articles/cervix">cervix</a> and <a href="/articles/vagina">vaginal wall</a>. It is considered as a positive result when this sliding motion is absent. Studies have shown that in women with suspected endometriosis undergoing laparoscopy, this sign has greater than 90% accuracy in predicting the likelihood of POD obliteration, with a sensitivity ranging from 72-83% and specificity of 97-100% <sup>1</sup>.</p><p>Given the complexity of the surgery and prolonged operating times associated with POD obliteration due to peritoneal endometriosis, it is useful for the laparoscopic surgeon to know the status of the POD preoperatively.</p>- +<p>The loss of the normal<strong> sliding sign</strong> is a dynamic sonographic sign performed during transvaginal ultrasound (TVS) of women with pelvic peritoneal <a href="/articles/endometriosis">endometriosis</a> indicating <a href="/articles/rectouterine-pouch">pouch of Douglas</a> (POD) involvement and obliteration.</p><p>This technique involves using gentle probe pressure to assess whether the anterior <a href="/articles/rectum">rectum</a> and <a href="/articles/sigmoid-colon">sigmoid colon</a> glides freely across the posterior aspect of the upper <a href="/articles/uterus">uterus</a>, <a href="/articles/cervix">cervix</a> and <a href="/articles/vagina">vaginal wall</a>. </p><p>Normal sliding motion of the uterus is regarded as a “positive” sliding sign.</p><p>A “negative” sliding sign is when this sliding motion is absent, indicating obliteration of the pouch of Douglas. Studies have shown that in women with suspected endometriosis undergoing laparoscopy, this sign has greater than 90% accuracy in predicting the likelihood of POD obliteration, with a sensitivity ranging from 72-83% and specificity of 97-100% <sup>1</sup>.</p><p>Given the complexity of the surgery and prolonged operating times associated with POD obliteration due to peritoneal endometriosis, it is useful for the laparoscopic surgeon to know the status of the POD preoperatively.</p>