Article

Challenges in Prosthesis Classification

The Swedish Knee Arthroplasty Register, Department of Orthopaedics and Clinical Sciences, Lund University Hospital, SE 221 85, Lund, Sweden.
The Journal of Bone and Joint Surgery (Impact Factor: 5.28). 12/2011; 93 Suppl 3(Supplement_3):72-5. DOI: 10.2106/JBJS.K.00990
Source: PubMed

ABSTRACT

Accurate prosthesis classification is critical for total joint arthroplasty surveillance and assessment of comparative effectiveness. Historically, prosthesis classification was based solely on the names of the prosthesis manufacturers. As a result, prosthesis designs changed without corresponding name changes, and other prostheses' names changed over time without substantial design modifications. As the number of prostheses used in total joint arthroplasty on the market increased, catalog and lot numbers associated with prosthesis descriptions were introduced by manufacturers. Currently, these catalog and lot numbers are not standardized, and there is no consensus on categorization of these numbers into brands or subbrands. Classification of the attributes of a prosthesis also varies, limiting comparisons of prostheses across studies and reports. The development of a universal prosthesis classification system would standardize prosthesis classification and enhance total joint arthroplasty research collaboration worldwide. This is a current area of focus for the International Consortium of Orthopaedic Registries (ICOR).

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    Full-text · Article · Apr 2013 · Revista Espanola de Cirugia Ortopedica y Traumatologia
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    ABSTRACT: Objective The aim is to present the functioning and results of the Catalan Arthroplasty Registry (RACat).Material and methodThe RACat arose by the initiative of the Catalan Society of Orthopaedic Surgery and Traumatology, the Catalan Health Service (CHS) and the Catalan Agency for Health Information Assessment and Quality. Publicly funded hospitals sent information through the Internet (CHS Applications website) on knee and hip arthroplasties: patient identification, hospital, joint (hip/knee), type (primary/revision), side of operation, date of surgery and prosthesis (manufacturer's name and reference number). The quality of the data is analysed regularly. We estimate the risk of replacement by the Kaplan-Meier method.ResultsA total of 52 hospitals out of 62 send data to RACat, and information on 36,951 knee and 26,477 hip arthroplasties is available. Data quality improved between 2005 and 2010. In 2010 coverage exceeded 70%, with side of operation 97%, and prostheses identification of 80%. The risk of replacement at three years was 3.3% (95% CI: 3.1-3.6) for knee, 2.9% (95% CI: 2.5-3.3) for total hip, and 2.5% (95% CI: 2.0-3.1) for partial hip.DiscussionRisk of replacement is higher than that observed in other registers, although data quality and its improvement over time should be taken into account.Conclusions The information available in the RACat will help to establish a standard that will enable hospitals to compare results.
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