{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T07:53:55Z","timestamp":1792050835654,"version":"4.4.0"},"reference-count":14,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2026,5,25]],"date-time":"2026-05-25T00:00:00Z","timestamp":1779667200000},"content-version":"vor","delay-in-days":144,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Asian J Endoscop Surgery"],"published-print":{"date-parts":[[2026,1]]},"abstract":"ABSTRACT<\/jats:title>\n \n Introduction<\/jats:title>\n Intracorporeal suturing in minimally invasive surgery remains technically demanding due to limited maneuverability and confined working space. Conventional suturing needles with fixed curvature can cause excessive tissue stress and irregular suture lines. We developed a novel surgical needle incorporating a clothoid (Euler spiral) curve, designed to provide smoother penetration and improved tip control.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n \n A prospective, single\u2010center, crossover study was conducted using a laparoscopic dry\u2010lab simulator to compare a clothoid curve needle with a conventional curved needle. Sixteen surgeons (6 experts, 10 nonexperts) performed standardized laparoscopic suturing tasks with both needles. Objective evaluation of tissue displacement was recorded by internal sensors, capturing maximum deviation in three axes:\n X<\/jats:italic>\n (left\u2013right),\n Y<\/jats:italic>\n (anterior\u2013posterior), and\n Z<\/jats:italic>\n (vertical). Subjective usability was assessed using an 8\u2010item Likert scale.\n <\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n Objective analysis revealed that experts showed reduced displacement with the clothoid needle in the\n Z<\/jats:italic>\n direction (\n p<\/jats:italic>\n \u2009=\u20090.031), while nonexperts showed less deviation in the\n Y<\/jats:italic>\n direction (\n p<\/jats:italic>\n \u2009=\u20090.019). In the overall cohort,\n Y<\/jats:italic>\n \u2010axis deviation was also significantly lower with the clothoid needle (\n p<\/jats:italic>\n \u2009=\u20090.038). The clothoid needle showed significantly higher Likert scores in thread pulling (\n p<\/jats:italic>\n \u2009<\u20090.001), smoothness of needle driving (\n p<\/jats:italic>\n \u2009=\u20090.031), tip control (\n p<\/jats:italic>\n \u2009=\u20090.008), tissue penetration resistance (\n p<\/jats:italic>\n \u2009=\u20090.045), and overall satisfaction (\n p<\/jats:italic>\n \u2009<\u20090.001).\n <\/jats:p>\n <\/jats:sec>\n \n Conclusion<\/jats:title>\n The clothoid needle may offer potential advantages in selected aspects of laparoscopic suturing performance, although the effects differed according to operator experience and displacement axis.<\/jats:p>\n <\/jats:sec>","DOI":"10.1111\/ases.70318","type":"journal-article","created":{"date-parts":[[2026,5,26]],"date-time":"2026-05-26T05:51:41Z","timestamp":1779774701000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Development and Dry\u2010Lab Evaluation of a Novel Clothoid Curve Needle for Laparoscopic Suturing"],"prefix":"10.1111","volume":"19","author":[{"given":"Takeru","family":"Matsuda","sequence":"first","affiliation":[{"name":"Division of Gastrointestinal Surgery, Department of Surgery Kobe University Graduate School of Medicine Kobe Japan"},{"name":"Division of Minimally Invasive Surgery, Department of Surgery Kobe University Graduate School of Medicine Kobe Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1550-2623","authenticated-orcid":false,"given":"Munenori","family":"Uemua","sequence":"additional","affiliation":[{"name":"Division of Biomedical Engineering, Faculty of Advanced Science and Technology Kumamoto University Kumamoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kazunobu","family":"Hashikawa","sequence":"additional","affiliation":[{"name":"Department of Plastic and Reconstructive Surgery Nagoya University Graduate School of Medicine Nagoya Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Takashi","family":"Kato","sequence":"additional","affiliation":[{"name":"Department of Esophageal Surgery, Gastroenterological Center, Cancer Institute Hospital Japanese Foundation for Cancer Research Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shingo","family":"Kanaji","sequence":"additional","affiliation":[{"name":"Division of Gastrointestinal Surgery, Department of Surgery Kobe University Graduate School of Medicine Kobe Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yoshihiro","family":"Kakeji","sequence":"additional","affiliation":[{"name":"Division of Gastrointestinal Surgery, Department of Surgery Kobe University Graduate School of Medicine Kobe Japan"},{"name":"Division of Minimally Invasive Surgery, Department of Surgery Kobe University Graduate School of Medicine Kobe Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,5,25]]},"reference":[{"key":"e_1_2_11_2_1","doi-asserted-by":"publisher","DOI":"10.1111\/iju.15561"},{"key":"e_1_2_11_3_1","doi-asserted-by":"publisher","DOI":"10.3389\/fsurg.2014.00015"},{"key":"e_1_2_11_4_1","doi-asserted-by":"publisher","DOI":"10.1097\/SLA.0b013e3181e6239e"},{"key":"e_1_2_11_5_1","doi-asserted-by":"publisher","DOI":"10.1002\/ags3.12462"},{"key":"e_1_2_11_6_1","doi-asserted-by":"publisher","DOI":"10.1111\/jog.70133"},{"key":"e_1_2_11_7_1","doi-asserted-by":"publisher","DOI":"10.1002\/bjs.6344"},{"key":"e_1_2_11_8_1","first-page":"1608","article-title":"Bimodal Assessment of Laparoscopic Suturing Skills: Construct and Concurrent Validity","volume":"18","author":"Moorthy K.","year":"2004","journal-title":"Surgical Endoscopy"},{"key":"e_1_2_11_9_1","first-page":"17","article-title":"Intracorporeal Knot\u2010Tying and Suturing Techniques in Laparoscopic Surgery: Technical Details","volume":"4","author":"Croce E.","year":"2000","journal-title":"Journal of the Society of Laparoscopic & Robotic Surgeons"},{"key":"e_1_2_11_10_1","doi-asserted-by":"publisher","DOI":"10.21037\/atm.2018.05.17"},{"key":"e_1_2_11_11_1","doi-asserted-by":"publisher","DOI":"10.3390\/infrastructures5050043"},{"key":"e_1_2_11_12_1","first-page":"1","article-title":"The CLOTHOID Computation: A Simple and Efficient Numerical Algorithm","volume":"142","author":"Vazquez\u2010Mendez GC M. E.","year":"2016","journal-title":"Journal of Surveying Engineering"},{"key":"e_1_2_11_13_1","doi-asserted-by":"publisher","DOI":"10.1001\/archsurg.139.1.89"},{"key":"e_1_2_11_14_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00464-011-1941-5"},{"key":"e_1_2_11_15_1","doi-asserted-by":"publisher","DOI":"10.4103\/0972-9941.65161"}],"container-title":["Asian Journal of Endoscopic Surgery"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/ases.70318","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/full-xml\/10.1111\/ases.70318","content-type":"application\/xml","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/ases.70318","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T07:24:13Z","timestamp":1792049053000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/ases.70318"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,1]]},"references-count":14,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2026,1]]}},"alternative-id":["10.1111\/ases.70318"],"URL":"https:\/\/doi.org\/10.1111\/ases.70318","archive":["Portico"],"relation":{},"ISSN":["1758-5902","1758-5910"],"issn-type":[{"value":"1758-5902","type":"print"},{"value":"1758-5910","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,1]]},"assertion":[{"value":"2026-01-24","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-05-22","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-05-25","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"e70318"}}