| Title {1} | Comparison of ultrasound-guided and palpation-inserted peripheral venous cannula in patients before primary hip or knee arthroplasty: study protocol for a randomized controlled trial |
| Trial registration {2a and 2b}. | ClinicalTrials.gov, under CT number: NCT05156008 |
| Protocol version {3} | version 4.0 (Feb. 16, 2022) of the original protocol |
| Funding {4} | No funding |
| Author details {5a} |
1Department of Anaesthesia and Intensive Care, Slovak Medical University, F. D. Roosevelt University Hospital, Banska Bystrica, Slovakia 2Department of Biology & Ecology, Faculty of Natural Sciences, Matej Bel University, Banska Bystrica, Slovakia 3Institute of Anatomy, Faculty of Medicine, Comenius University Bratislava, Slovakia 4 Orthopedic Department, Slovak Medical University, F. D. Roosevelt University Hospital, Banska Bystrica, Slovakia |
| Name and contact information for the trial sponsor {5b} | F. D. Roosevelt University Hospital Banska Bystrica, Slovakia, Nám. L. Svobodu 1, Banska Bysrica, Slovakia. |
| Role of sponsor {5c} | Legal responsibility, provides facilities and medical staff. |
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