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A US reference line was fixed between the lower edge of the pubic symphysis and the central axis of the pubic symphysis at a 30\u00b0counterclockwise angle.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Method<\/jats:title>\n                <jats:p>Points Aa, Ba, C and Bp on pelvic organ prolapse quantification (POP-Q) were then compared with the points on pelvic floor ultrasound (PFUS).<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>One hundred thirteen patients were included in the analysis of the standard US plane. Correlations were good in the anterior and middle compartments (PBN:Aa, ICC\u2009=\u20090.922; PBB:Ba, ICC\u2009=\u20090.923; and PC:C, ICC\u2009=\u20090.925), and Bland-Altman statistical maps corresponding to the average difference around the 30\u00b0horizontal line were close to 0. Correlations were poor in the posterior compartment (PRA:Bp, ICC\u2009=\u20090.444). However, eight (7.1%) cases of intestinal hernia and 21 (18.6%) cases of rectocele were diagnosed.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>Introital PFUS using an intracavitary probe, which is gently placed at the introitus of the urethra and the vagina, may be accurately used to evaluate organ displacement. The application of a 30\u00b0horizontal line may improve the repeatability of the US diagnosis of POP.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12880-023-01013-6","type":"journal-article","created":{"date-parts":[[2023,10,30]],"date-time":"2023-10-30T14:01:36Z","timestamp":1698674496000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Clinical application of a fixed reference line in the ultrasound quantitative diagnosis of female pelvic organ prolapse"],"prefix":"10.1186","volume":"23","author":[{"given":"Xiaojuan","family":"Cao","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Yuwen","family":"Qiu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhiyong","family":"Peng","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lan","family":"Chen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Li","family":"Zhou","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anwei","family":"Lu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chunlin","family":"Chen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ping","family":"Liu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2023,10,30]]},"reference":[{"issue":"4","key":"1013_CR1","doi-asserted-by":"publisher","first-page":"1655","DOI":"10.1007\/s00192-016-3003-y","volume":"27","author":"BT Haylen","year":"2016","unstructured":"Haylen BT, Maher CF, Barber MD, Camargo S, Dandolu V, Digesu A, et al. 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The study was approved by the Ethics Committee of Nanfang Hospital, Southern Medical University.Registration number: ChiCTR-DDD-16009075. All methods in the study were carried out in accordance with the Helsinki guidelines and declaration. For all research involving human participants, informed consent to participate in the study was obtained from participants.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors have no conflicts of interest to declare.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"170"}}