{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,14]],"date-time":"2026-10-14T13:46:38Z","timestamp":1791985598857,"version":"4.4.0"},"reference-count":16,"publisher":"Ovid Technologies (Wolters Kluwer Health)","issue":"4","license":[{"start":{"date-parts":[[2026,10,1]],"date-time":"2026-10-01T00:00:00Z","timestamp":1790812800000},"content-version":"unspecified","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0"}],"content-domain":{"domain":["lww.com","ovid.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2026,10]]},"abstract":"ABSTRACT<\/jats:title>\n \n Objective:<\/jats:title>\n To compare the effectiveness and safety of a novel geometric landmark technique with the conventional palpation technique for central venous cannulation.<\/jats:p>\n <\/jats:sec>\n \n Study Design:<\/jats:title>\n Comparative observational study.<\/jats:p>\n <\/jats:sec>\n \n Place and Duration of the Study:<\/jats:title>\n This study was conducted at National Medical Centre (NMC) from January 01, 2025 to June 30, 2025.<\/jats:p>\n <\/jats:sec>\n \n Methods:<\/jats:title>\n \n A total of 100 adult patients requiring central venous cannulation were enrolled and allocated into two groups based on the technique used. Group A (\n n<\/jats:italic>\n = 50) underwent cannulation using the geometric landmark method, while Group B (\n n<\/jats:italic>\n = 50) underwent cannulation using the conventional palpation technique. First-attempt success rate was the main outcome. Secondary outcomes were the number of attempts, arterial puncture, and change of technique. SPSS software was used for analysis. Chi-square test was used to compare categorical variables whereas the Mann-Whitney U test was applied to the non-normally distributed continuous variables. A P value of less than 0.05 was considered statistically significant.\n <\/jats:p>\n <\/jats:sec>\n \n Results:<\/jats:title>\n \n First-attempt success was significantly higher in the geometric landmark group compared to the palpation group (98% vs. 86%;\n P<\/jats:italic>\n = 0.027). The geometric landmark technique was associated with fewer cannulation attempts (mean 1.00 \u00b1 0.00 vs. 1.18 \u00b1 0.57;\n P<\/jats:italic>\n = 0.012). Arterial puncture occurred in one patient (2%) in each group, with no statistically significant difference (\n P<\/jats:italic>\n = 1.000). Technique change was required in one patient (2%) in each group, with no statistically significant difference between the two techniques (\n P<\/jats:italic>\n = 1.000). The two groups had similar baseline demographic and clinical characteristics.\n <\/jats:p>\n <\/jats:sec>\n \n Conclusion:<\/jats:title>\n The geometric landmark technique significantly improves first-attempt success and reduces the number of cannulation attempts compared with the conventional palpation method while maintaining a comparable safety profile. This technique represents a practical and cost-effective alternative for central venous cannulation, particularly in resource-limited settings.<\/jats:p>\n <\/jats:sec>","DOI":"10.4103\/aca.aca_43_26","type":"journal-article","created":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T17:00:14Z","timestamp":1791824414000},"page":"503-509","update-policy":"https:\/\/doi.org\/10.1097\/lww.0000000000001000","source":"Crossref","is-referenced-by-count":0,"title":["Comparison of a Novel Geometric Landmark Method Versus Conventional Palpation Technique for Central Venous Cannulation: A Comparative Observational Study of Two Techniques"],"prefix":"10.4103","volume":"29","author":[{"given":"Muhammad Arslan","family":"Zahid","sequence":"first","affiliation":[{"name":"Department of Anesthesiology, National Medical Centre, Karachi, Pakistan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ahmed 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