Whittaker JP, Dwyer KA, Howard J, Huey V, Lesko J, Nunley RM, Verdonk P. Learning curve with a new primary total knee arthroplasty implant: a multicenter perspective with more than 2000 patients.
Arthroplast Today 2018;
4:348-353. [PMID:
30186920 PMCID:
PMC6123238 DOI:
10.1016/j.artd.2018.05.004]
[Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 05/16/2018] [Accepted: 05/17/2018] [Indexed: 02/07/2023] Open
Abstract
Background
This study provides an example for evaluating learning curve when introducing a new knee system.
Methods
Thirty-five investigators across 22 sites prospectively implanted 843 subjects with currently available products (group A). Seventy-seven investigators across 48 sites prospectively implanted 2330 subjects with the ATTUNE Knee System; in which the first 10 subjects for each surgeon were the learning curve cases (group B, N = 611), and the later subjects were designated as group C (N = 1719). Surgical time, rates of intraoperative and early postoperative complications, and patient-reported outcome measures (PROMs) at a minimum of 1 year were compared.
Results
Mean (standard deviation) surgical time was 72.0 (21.6) minutes for group A, 83.0 (24.2) for group B, and 72.1 (24.1) for group C (P < .001 for group B vs group C; P = .955 for group C vs group A). Intraoperative, early (<90 day) complication rates, and PROMs were similar for all groups.
Conclusions
The new knee system learning curve was characterized by a slightly longer surgical time with no negative impact on complications or PROMs.
Level of Evidence
III.
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