{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,18]],"date-time":"2026-07-18T08:57:40Z","timestamp":1784365060892,"version":"3.55.0"},"reference-count":30,"publisher":"Springer Science and Business Media LLC","issue":"2","license":[{"start":{"date-parts":[[2025,10,28]],"date-time":"2025-10-28T00:00:00Z","timestamp":1761609600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.springernature.com\/gp\/researchers\/text-and-data-mining"},{"start":{"date-parts":[[2025,10,28]],"date-time":"2025-10-28T00:00:00Z","timestamp":1761609600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.springernature.com\/gp\/researchers\/text-and-data-mining"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["J Med Ultrasonics"],"published-print":{"date-parts":[[2026,4]]},"DOI":"10.1007\/s10396-025-01587-4","type":"journal-article","created":{"date-parts":[[2025,10,28]],"date-time":"2025-10-28T17:49:19Z","timestamp":1761673759000},"page":"189-197","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Optimizing forceps delivery safety: predicting anal sphincter injury with intrapartum ultrasound"],"prefix":"10.1007","volume":"53","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5980-2791","authenticated-orcid":false,"given":"Shin","family":"Hashiramoto","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hiroko","family":"Takita","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tatsuya","family":"Arakaki","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuka","family":"Yamashita","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mayumi","family":"Kaneko","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ryu","family":"Matsuoka","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Akihiko","family":"Sekizawa","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,10,28]]},"reference":[{"key":"1587_CR1","doi-asserted-by":"publisher","first-page":"1365","DOI":"10.1111\/1471-0528.14553","volume":"124","author":"AA Merriam","year":"2017","unstructured":"Merriam AA, Ananth CV, Wright JD, et al. Trends in operative vaginal delivery, 2005\u20132013: a population-based study. BJOG. 2017;124:1365\u201372.","journal-title":"BJOG"},{"key":"1587_CR2","doi-asserted-by":"publisher","first-page":"141","DOI":"10.1016\/j.ejogrb.2011.03.008","volume":"157","author":"J Unterscheider","year":"2011","unstructured":"Unterscheider J, McMenamin M, Cullinane F. Rising rates of caesarean deliveries at full cervical dilatation: a concerning trend. Eur J Obstet Gynecol Reprod Biol. 2011;157:141\u20134.","journal-title":"Eur J Obstet Gynecol Reprod Biol"},{"key":"1587_CR3","doi-asserted-by":"publisher","first-page":"311","DOI":"10.1136\/bmj.37942.546076.44","volume":"328","author":"R Bahl","year":"2004","unstructured":"Bahl R, Strachan B, Murphy DJ. Outcome of subsequent pregnancy three years after previous operative delivery in the second stage of labour: cohort study. Br Med J. 2004;328:311\u20134.","journal-title":"Br Med J"},{"key":"1587_CR4","doi-asserted-by":"publisher","first-page":"1203","DOI":"10.1016\/S0140-6736(01)06341-3","volume":"358","author":"D Murphy","year":"2001","unstructured":"Murphy D, Liebling R, Verity L, et al. Early maternal and neonatal morbidity associated with operative delivery in second stage of labour: a cohort study. Lancet. 2001;358:1203\u20137.","journal-title":"Lancet"},{"key":"1587_CR5","doi-asserted-by":"publisher","first-page":"510","DOI":"10.1111\/j.1479-828X.2009.01060.x","volume":"49","author":"R Al-Suhel","year":"2009","unstructured":"Al-Suhel R, Gill S, Robson S, et al. Kjelland\u2019s forceps in the new millennium. Maternal and neonatal outcomes of attempted rotational forceps delivery: Original Article. Aust N Z J Obstet Gynaecol. 2009;49:510\u20134.","journal-title":"Aust N Z J Obstet Gynaecol"},{"key":"1587_CR6","doi-asserted-by":"publisher","first-page":"111","DOI":"10.1002\/ajum.12121","volume":"22","author":"S Usman","year":"2019","unstructured":"Usman S, Kahrs B, Barton H, et al. Time to delivery based on sonographic assessment prior to forceps and vacuum. Australas J Ultrasound Med. 2019;22:111\u20137.","journal-title":"Australas J Ultrasound Med"},{"key":"1587_CR7","doi-asserted-by":"publisher","first-page":"344","DOI":"10.1080\/01443610220141227","volume":"22","author":"DS Weerasekera","year":"2002","unstructured":"Weerasekera DS, Premaratne S. A randomised prospective trial of the obstetric forceps versus vacuum extraction using defined criteria. J Obstet Gynaecol. 2002;22:344\u20135.","journal-title":"J Obstet Gynaecol"},{"key":"1587_CR8","doi-asserted-by":"publisher","first-page":"467","DOI":"10.1111\/j.1471-0528.2000.tb13263.x","volume":"107","author":"Y Okunwobi-Smith","year":"2000","unstructured":"Okunwobi-Smith Y, Cooke I, MacKenzie IZ. Decision to delivery intervals for assisted vaginal vertex delivery. BJOG. 2000;107:467\u201371.","journal-title":"BJOG"},{"key":"1587_CR9","first-page":"176","volume":"27","author":"K Zajac","year":"2023","unstructured":"Zajac K, Rybnik M, K\u0229siak M, et al. Is there still a place for forceps delivery in modern obstetrics? J Mother Child. 2023;27:176\u201381.","journal-title":"J Mother Child"},{"key":"1587_CR10","doi-asserted-by":"publisher","first-page":"1516","DOI":"10.1111\/1471-0528.12363","volume":"120","author":"I Gurol-Urganci","year":"2013","unstructured":"Gurol-Urganci I, Cromwell DA, Edozien LC, et al. Third- and fourth-degree perineal tears among primiparous women in England between 2000 and 2012: time trends and risk factors. BJOG. 2013;120:1516\u201325.","journal-title":"BJOG"},{"key":"1587_CR11","doi-asserted-by":"publisher","first-page":"62","DOI":"10.1111\/j.1471-0528.2010.02775.x","volume":"118","author":"B Tutschek","year":"2011","unstructured":"Tutschek B, Braun T, Chantraine F, et al. A study of progress of labour using intrapartum translabial ultrasound, assessing head station, direction, and angle of descent. BJOG. 2011;118:62\u20139.","journal-title":"BJOG"},{"key":"1587_CR12","doi-asserted-by":"publisher","first-page":"338","DOI":"10.1002\/uog.24886","volume":"60","author":"AA Nassr","year":"2022","unstructured":"Nassr AA, Hessami K, Berghella V, et al. Angle of progression measured using transperineal ultrasound for prediction of uncomplicated operative vaginal delivery: systematic review and meta-analysis. Ultrasound Obstet Gynecol. 2022;60:338\u201345.","journal-title":"Ultrasound Obstet Gynecol"},{"key":"1587_CR13","doi-asserted-by":"publisher","first-page":"313","DOI":"10.1002\/uog.6329","volume":"33","author":"AF Barbera","year":"2009","unstructured":"Barbera AF, Pombar X, Peruginoj G, et al. A new method to assess fetal head descent in labor with transperineal ultrasound. Ultrasound Obstet Gynecol. 2009;33:313\u20139.","journal-title":"Ultrasound Obstet Gynecol"},{"key":"1587_CR14","doi-asserted-by":"publisher","first-page":"387","DOI":"10.1002\/uog.2744","volume":"27","author":"TM Eggeb\u00f8","year":"2006","unstructured":"Eggeb\u00f8 TM, Gjessing LK, Heien C, et al. Prediction of labor and delivery by transperineal ultrasound in pregnancies with prelabor rupture of membranes at term. Ultrasound Obstet Gynecol. 2006;27:387\u201391.","journal-title":"Ultrasound Obstet Gynecol"},{"key":"1587_CR15","doi-asserted-by":"publisher","first-page":"305","DOI":"10.1007\/s10396-025-01536-1","volume":"52","author":"H Takita","year":"2025","unstructured":"Takita H, Matsuoka R, Sekiya B, et al. Assessing the difficulty of forceps delivery using a transperineal ultrasonographic station: a prospective cohort study. J Med Ultrasonics. 2025;52:305\u201311.","journal-title":"J Med Ultrasonics"},{"key":"1587_CR16","doi-asserted-by":"publisher","first-page":"331","DOI":"10.1002\/uog.6313","volume":"33","author":"T Ghi","year":"2009","unstructured":"Ghi T, Farina A, Pedrazzi A, et al. Diagnosis of station and rotation of the fetal head in the second stage of labor with intrapartum translabial ultrasound. Ultrasound Obstet Gynecol. 2009;33:331\u20136.","journal-title":"Ultrasound Obstet Gynecol"},{"key":"1587_CR17","doi-asserted-by":"publisher","first-page":"193","DOI":"10.1177\/135626229900500601","volume":"5","author":"AH Sultan","year":"1999","unstructured":"Sultan AH. Editorial: Obstetrical perineal injury and anal incontinence. Clin Risk. 1999;5:193\u20136.","journal-title":"Clin Risk"},{"key":"1587_CR18","doi-asserted-by":"publisher","first-page":"1075","DOI":"10.1111\/aogs.14065","volume":"100","author":"JG Barros","year":"2021","unstructured":"Barros JG, Afonso M, Martins AT, et al. Transabdominal and transperineal ultrasound vs routine care before instrumental vaginal delivery \u2013 a randomized controlled trial. Acta Obstet Gynecol Scand. 2021;100:1075\u201381.","journal-title":"Acta Obstet Gynecol Scand"},{"key":"1587_CR19","doi-asserted-by":"publisher","first-page":"1941","DOI":"10.1111\/aogs.14236","volume":"100","author":"I Mappa","year":"2021","unstructured":"Mappa I, Tartaglia S, Maqina P, et al. Ultrasound vs routine care before instrumental vaginal delivery: a systematic review and meta-analysis. Acta Obstet Gynecol Scand. 2021;100:1941\u20138.","journal-title":"Acta Obstet Gynecol Scand"},{"issue":"1","key":"1587_CR20","doi-asserted-by":"publisher","first-page":"699","DOI":"10.1002\/uog.19091","volume":"52","author":"T Ghi","year":"2018","unstructured":"Ghi T, DallAsta A, Masturzo B, et al. Randomised Italian sonography for occiput POSition trial ante vacuum (RISPOSTA). Ultrasound Obstet Gynecol. 2018;52(1):699\u2013705.","journal-title":"Ultrasound Obstet Gynecol"},{"key":"1587_CR21","doi-asserted-by":"publisher","first-page":"687","DOI":"10.1002\/uog.13256","volume":"43","author":"MJ Cuerva","year":"2014","unstructured":"Cuerva MJ, Bamberg C, Tobias P, et al. Use of intrapartum ultrasound in the prediction of complicated operative forceps delivery of fetuses in non-occiput posterior position. Ultrasound Obstet Gynecol. 2014;43:687\u201392.","journal-title":"Ultrasound Obstet Gynecol"},{"key":"1587_CR22","doi-asserted-by":"publisher","first-page":"735","DOI":"10.1002\/uog.6400","volume":"33","author":"WL Lau","year":"2009","unstructured":"Lau WL, Leung WC, Chin R. What is the best transperineal ultrasound parameter for predicting success of vacuum extraction? Ultrasound Obstet Gynecol. 2009;33:735.","journal-title":"Ultrasound Obstet Gynecol"},{"key":"1587_CR23","doi-asserted-by":"publisher","first-page":"753","DOI":"10.1002\/uog.3848","volume":"28","author":"W Henrich","year":"2006","unstructured":"Henrich W, Dudenhausen J, Fuchs I, et al. Intrapartum translabial ultrasound (ITU): sonographic landmarks and correlation with successful vacuum extraction. Ultrasound Obstet Gynecol. 2006;28:753\u201360.","journal-title":"Ultrasound Obstet Gynecol"},{"key":"1587_CR24","doi-asserted-by":"publisher","first-page":"524","DOI":"10.1002\/uog.20348","volume":"54","author":"BH Kahrs","year":"2019","unstructured":"Kahrs BH, Usman S, Ghi T, et al. Descent of fetal head during active pushing: secondary analysis of prospective cohort study investigating ultrasound examination before operative vaginal delivery. Ultrasound Obstet Gynecol. 2019;54:524\u20139.","journal-title":"Ultrasound Obstet Gynecol"},{"key":"1587_CR25","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajogmf.2024.101403","volume":"6","author":"E Yano","year":"2024","unstructured":"Yano E, Sayama S, Iriyama T, et al. Prediction of spontaneous vaginal delivery in the prolonged second stage using the delta angle of progression. Am J Obstet Gynecol MFM. 2024;6:101403.","journal-title":"Am J Obstet Gynecol MFM"},{"key":"1587_CR26","doi-asserted-by":"publisher","first-page":"175","DOI":"10.1016\/j.ejogrb.2020.08.026","volume":"254","author":"T Giacchino","year":"2020","unstructured":"Giacchino T, Karkia R, Zhang W, et al. Kielland\u2019s rotational forceps delivery: a comparison of maternal and neonatal outcomes with rotational ventouse or second stage caesarean section deliveries. Eur J Obstet Gynecol Reprod Biol. 2020;254:175\u201380.","journal-title":"Eur J Obstet Gynecol Reprod Biol"},{"key":"1587_CR27","doi-asserted-by":"publisher","first-page":"1905","DOI":"10.1056\/NEJM199312233292601","volume":"329","author":"A Sultan","year":"1993","unstructured":"Sultan A, Kamm M, Hudson C, et al. Anal-sphincter disruption during vaginal delivery. N Engl J Med. 1993;329:1905\u201311.","journal-title":"N Engl J Med"},{"key":"1587_CR28","doi-asserted-by":"publisher","first-page":"e70","DOI":"10.1111\/1471-0528.16336","volume":"127","author":"DJ Murphy","year":"2020","unstructured":"Murphy DJ, Strachan BK, Bahl R. Assisted vaginal birth: green-top guideline no. 26. BJOG. 2020;127:e70\u2013112.","journal-title":"BJOG"},{"key":"1587_CR29","doi-asserted-by":"publisher","first-page":"1824","DOI":"10.1111\/1471-0528.17914","volume":"131","author":"K Fodstad","year":"2024","unstructured":"Fodstad K, Laine K, R\u00e4is\u00e4nen S. Obstetric anal sphincter injuries during instrumental vaginal delivery: an observational study based on 18-years of real-world data. BJOG. 2024;131:1824\u201331.","journal-title":"BJOG"},{"key":"1587_CR30","doi-asserted-by":"publisher","DOI":"10.1016\/j.jogc.2024.102415","volume":"46","author":"GM Muraca","year":"2024","unstructured":"Muraca GM, Desai A, H\u00e9bert V, et al. Variation in episiotomy use among nulliparous individuals by maternity care provider and associated rates of obstetric anal sphincter injury. J Obstet Gynaecol Can. 2024;46:102415.","journal-title":"J Obstet Gynaecol Can"}],"container-title":["Journal of Medical Ultrasonics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s10396-025-01587-4.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s10396-025-01587-4","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s10396-025-01587-4.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,19]],"date-time":"2026-04-19T17:53:31Z","timestamp":1776621211000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s10396-025-01587-4"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,10,28]]},"references-count":30,"journal-issue":{"issue":"2","published-print":{"date-parts":[[2026,4]]}},"alternative-id":["1587"],"URL":"https:\/\/doi.org\/10.1007\/s10396-025-01587-4","relation":{},"ISSN":["1346-4523","1613-2254"],"issn-type":[{"value":"1346-4523","type":"print"},{"value":"1613-2254","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,10,28]]},"assertion":[{"value":"13 August 2025","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"28 August 2025","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"28 October 2025","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"All authors declare that they have no conflicts of interest.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Conflicts of interest"}},{"value":"The data that support the findings of this study are available from the corresponding author upon reasonable request.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Data availability"}},{"value":"This study was conducted in accordance with the Declaration of Helsinki, and was approved by the ethics committee of Showa University Hospital, Tokyo, Japan (Approval No. 0229). Written informed consent was obtained from all patients.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethical approval"}}]}}