• Alessandro De Cassai, Federico Geraldini, Laura Pasin, Annalisa Boscolo, Francesco Zarantonello, Martina Tocco, Chiara Pretto, Matteo Perona, Michele Carron, and Paolo Navalesi.
• UOC Anaesthesia and Intensive Care Unit, University Hospital of Padua, 13, Gallucci St., 35121, Padua, Italy.
• BMC Anesthesiol. 2021 Oct 8; 21 (1): 241.

BackgroundCentral venous catheter (CVC) placement is a routine procedure but is potentially associated with severe complications. Relatively small studies investigated if the use of ultrasound is effective in bridging the skill gap between proficient and not proficient operators, while patient safety during training remains a controversial topic. The first aim of this study was to evaluate if resident proficiency affects the failure rate in CVC positioning under ultrasound guidance. In addition, it aimed to investigate the different rate of complications between proficient and non proficient residents.MethodsWe conducted a cohort study including CVC placed by residents at the University Hospital of Padova, from November 1, 2012 to July 9, 2020 comparing proficient and non proficient residents. To avoid bias the two cohorts were matched using propensity score.ResultsA total of 356 residents positioned 2310 CVC during the 8 year study period. Among them, two groups of 1060 CVCs each were matched with a propensity score analysis. There was no difference in the failure rate among the groups (2.8 vs 2.7%, p-value 0.895). Moreover, cohorts had the same rate of hematomas, catheter tip malposition, arterial puncture and pneumothorax. No cases of hemothorax were reported.ConclusionsWe found the same rate of success and incidence of adverse complications among cohorts, meaning that the process of skill acquisition is safe as long as appropriate training and direct supervision by a senior consultant are available.© 2021. The Author(s).

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