Trial reportActa obstetricia et gynecologica Scandinavica2023
Use of endoanal ultrasound in detecting obstetric anal sphincter injury immediately after birth.
Trial report in Acta obstetricia et gynecologica Scandinavica, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
9 citing papers in PubMed, 13 citations in OpenAlex.
- Lateral episiotomy or no episiotomy in vacuum assisted delivery in nulliparous women (EVA): multicentre, open label, randomised controlled trial.BMJ (Clinical research ed.) · 2024Trial
- Use of endoanal ultrasound in detecting obstetric anal sphincter injury immediately after birth.Acta obstetricia et gynecologica Scandinavica · 2023Trial
- Feasibility and reproducibility of a novel introital exo-anal ultrasound approach for assessment of the external anal sphincter.Acta obstetricia et gynecologica Scandinavica · 2026Article
- The Use of Transperineal and Endoanal Ultrasound in Diagnosis and Management of Obstetric Anal Sphincter Injuries (OASIs): A Narrative Review from a Gynecologic Perspective.Diagnostics (Basel, Switzerland) · 2026Review
- Role of Ultrasound in the Evaluation of Women with Obstetric Anal Sphincter Injuries: Narrative Review.International urogynecology journal · 2026Review
- Obstetric Anal Sphincter Injuries: A Urogynecologic Perspective on Detection and Diagnosis.International urogynecology journal · 2025Review
- Obstetric anal sphincter injuries (OASIS) and secondary repair (overlapping sphincteroplasty) in a colorectal unit: case series.Annals of medicine and surgery (2012) · 2025Article
- Detection of obstetric anal sphincter injuries using machine learning-assisted impedance spectroscopy: a prospective, comparative, multicentre clinical study.Scientific reports · 2025Article
- Sonographic postpartum anal sphincter defects and the association with pelvic floor pain and dyspareunia.Acta obstetricia et gynecologica Scandinavica · 2023Article
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 1 country.
Funding
Abstract
introductionObstetric anal sphincter injury (OASI) complicates around 5% of deliveries in primiparas. The study objective was to assess the utility of three-dimensional endoanal ultrasonography (3D-EAUS) in the diagnosis of OASI. MATERIAL AND
methodsThe present study was designed to mirror screening settings with an unselected cohort of nulliparous women. All enrolled patients underwent clinical examination of the perineum by the caregiver, and 3D-EAUS was conducted. Post-processing of ultrasonography volume data was performed by an experienced colorectal surgeon who was blinded to all other data. The sensitivity, specificity, negative predictive value, and positive predictive value of 3D-EAUS in the diagnosis of OASI was evaluated. The trial is registered at ISCRTN: 18006769.
resultsA total of 680 scans were performed, of which 18.5% were judged as "non-assessable", resulting in 554 assessable recordings. Sphincter defects were observed in 12.8% of all assessable recordings on 3D-EAUS (n = 71). With clinical examination set as the reference standard, ultrasound sensitivity in the diagnosis of OASI was 30.4%, whereas its specificity was 87.9%. The negative predictive value was 96.7% and the positive predictive value was only 9.9%. Comments were left on 175 examinations, of which 74% referred to the management of the examination.
conclusionsUsing 3D-EAUS in a maternity ward is demanding because staff generally have little experience in endoanal ultrasound, which contributes to difficulties in obtaining good image quality. When 3D-EAUS is performed to mirror screening settings, it adds no convincing diagnostic power to clinical examination in the diagnosis of OASI.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.