{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,3]],"date-time":"2026-02-03T17:24:40Z","timestamp":1770139480914,"version":"3.49.0"},"reference-count":30,"publisher":"BMJ","issue":"8","license":[{"start":{"date-parts":[[2020,6,14]],"date-time":"2020-06-14T00:00:00Z","timestamp":1592092800000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"funder":[{"DOI":"10.13039\/100010661","name":"Horizon 2020 Framework Programme","doi-asserted-by":"publisher","award":["691262"],"award-info":[{"award-number":["691262"]}],"id":[{"id":"10.13039\/100010661","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["bmj.com"],"crossmark-restriction":true},"short-container-title":["Reg Anesth Pain Med"],"accepted":{"date-parts":[[2020,5,18]]},"published-print":{"date-parts":[[2020,8]]},"abstract":"<jats:sec>\n                  <jats:title>Background<\/jats:title>\n                  <jats:p>Onvision is a new technology for needle tip detection and tracking in ultrasound-guided regional anesthesia. The system consists of a piezoelectric sensor close to the needle tip and an electronic console integrated in the ultrasound system. The needle tip is visualized by a green circle on the ultrasound screen. The aim of the study was to investigate the effect of the new needle tip tracking technology on in-plane infraclavicular plexus blocks.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Methods<\/jats:title>\n                  <jats:p>The study was a randomized, controlled, observer blinded cross-over trial in 26 healthy volunteers. Two specialists in anesthesiology performed an ultrasound-guided infraclavicular lateral sagittal brachial plexus block with and without needle tip tracking. Primary outcome was procedure time, measured from insertion of the needle until local anesthesia injection was completed. Secondary outcome measures included the number of hand movements and path lengths (assessed by hand motion analysis), block success rate, onset time and duration, discomfort experienced by the volunteers, and the anesthesiologists\u2019 confidence as to whether their block would be successful or not.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Results<\/jats:title>\n                  <jats:p>Mean (SD) procedure time was 183.0 (56.1) s with and 206.8 (56.2) s without needle tip tracking (p=0.16). There were no significant differences in any of the secondary outcomes. Two volunteers\u2019 experienced Horner syndrome after blocks without needle tip tracking. No other adverse events occurred during the study.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Conclusion<\/jats:title>\n                  <jats:p>Our study on needle tip tracking for infraclavicular blocks did not reveal any significant differences between active needle tip tracking and the control procedures, neither for primary outcome nor secondary outcome measurements.<\/jats:p>\n               <\/jats:sec>\n               <jats:sec>\n                  <jats:title>Trial registration number<\/jats:title>\n                  <jats:p>\n                     <jats:ext-link xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" ext-link-type=\"clintrialgov\" xlink:href=\"NCT03631914\">NCT03631914<\/jats:ext-link>\n                  <\/jats:p>\n               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Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Luis","family":"Romundstad","sequence":"additional","affiliation":[{"name":"Division of Emergencies and Critical Care, Department of Anesthesiology, Oslo University Hospital, Oslo, Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L A","family":"Rosseland","sequence":"additional","affiliation":[{"name":"Division of Emergencies and Critical Care, Department of Research and Development, Oslo University Hospital, Oslo, Norway"},{"name":"Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Morten Wang","family":"Fagerland","sequence":"additional","affiliation":[{"name":"Oslo Centre for Biostatics and Epidemiology (OCBE) Research Support Services, Oslo University Hospital, Oslo, Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Paul","family":"Kessler","sequence":"additional","affiliation":[{"name":"Department of Anesthesiology, Intensive Care and Pain Medicine, Orthopedic University Hospital Friedrichsheim, Frankfurt am Main, Hessen, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ivar Nagelgaard","family":"Omen\u00e5s","sequence":"additional","affiliation":[{"name":"Division of Emergencies and Critical Care, Department of Anesthesiology, Oslo University Hospital, Oslo, Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Anne","family":"Holmberg","sequence":"additional","affiliation":[{"name":"Division of Emergencies and Critical Care, Department of Anesthesiology, Oslo University Hospital, Oslo, Norway"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Axel R","family":"Sauter","sequence":"additional","affiliation":[{"name":"Division of Emergencies and Critical Care, Department 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