{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,22]],"date-time":"2026-01-22T12:58:18Z","timestamp":1769086698374,"version":"3.49.0"},"reference-count":13,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T00:00:00Z","timestamp":1759968000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T00:00:00Z","timestamp":1759968000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Surg Endosc"],"published-print":{"date-parts":[[2026,1]]},"abstract":"Abstract<\/jats:title>\n \n Background<\/jats:title>\n The Veress Needle (VN) is commonly used in establishing pneumoperitoneum in laparoscopic surgery. However, severe vascular and\/or visceral complications can occur due to overshoot at the insertion of the VN in the abdominal cavity. In order to investigate whether the new VeressPLUS needle (VN+) could improve safety, the learning curve of this needle was compared to that of a conventional VN, under standardized conditions.<\/jats:p>\n <\/jats:sec>\n \n Methods<\/jats:title>\n In total, 26 residents and med students, without prior Veress needle experience, were recruited and randomly assigned to VN or the VN+ group. A learning curve plateau phase recognition model was developed and used to determine the learning curve of the participants who used either the VN or the VN+ needle on two Thiel-embalmed human cadavers. Insertion of the needles was done in a systematic way in the upper abdomen and insertion depth was measured under direct laparoscopic vision. At the end of the learning curve, the number of participants that reached a safe insertion depth between 5 and 15\u00a0mm was compared.<\/jats:p>\n <\/jats:sec>\n \n Results<\/jats:title>\n \n On average, it took the VN group 8 trials to reach and establish the plateau phase of the learning curve. The VN+ group showed no learning curve at all. At the 8th trial, a significant difference (\n p<\/jats:italic>\n \u2009<\u20090.002) in average insertion depth was found in favor of the VN+ (mean: 5.4\u00a0mm SD 1.4) compared to the VN (mean: 12.7\u00a0mm SD 6). In the VN group and VN+ group, 46% versus 8% exceeded the safe insertion depth of 10\u00a0mm at the end of the learning curve.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusion<\/jats:title>\n This study indicates that for novices, there is no learning curve for the VN+, when compared to VN. Moreover, in all cases, the insertion depths were significantly reduced (with more than 50%) while using the VN+ when compared to the VN.<\/jats:p>\n <\/jats:sec>","DOI":"10.1007\/s00464-025-12273-4","type":"journal-article","created":{"date-parts":[[2025,10,9]],"date-time":"2025-10-09T15:21:14Z","timestamp":1760023274000},"page":"247-254","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Learning curve estimation and insertion depth in Veress needle insertion using a conventional Veress needle and the VeressPlus\u2122 needle"],"prefix":"10.1007","volume":"40","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8527-4486","authenticated-orcid":false,"given":"Tim","family":"Horeman-Franse","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Roelf","family":"Postema","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"David","family":"Cefai","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sem Frederik","family":"Hardon","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Predrag","family":"Andrejevic","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jenny","family":"Dankelman","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jean","family":"Calleja-Agius","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Christian","family":"Camenzuli","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"297","published-online":{"date-parts":[[2025,10,9]]},"reference":[{"issue":"3","key":"12273_CR1","doi-asserted-by":"publisher","first-page":"246","DOI":"10.1111\/j.0004-8666.2002.00246.x","volume":"42","author":"D Molloy","year":"2002","unstructured":"Molloy D, Kaloo PD, Cooper M, Nguyen TV (2002) Laparoscopic entry: a literature review and analysis of techniques and complications of primary port entry. 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