Shoes size can predict implant sizes for primary total knee arthroplasty in a quick, reliable and costless manner

IF 2 Q2 ORTHOPEDICS

Journal of Experimental Orthopaedics Pub Date : 2025-07-18 DOI:10.1002/jeo2.70363

Corentin Philippe, Alexandre Leguen, Nicolas Vari, Pablo Froidefond, Gary Kolenc, Emilie Berard, Etienne Cavaignac

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引用次数: 0

Abstract

Purpose

Knowing the component sizes needed for a specific patient before total knee arthroplasty (TKA) surgery could help to optimise the logistics of medical device availability. Previous studies have correlated component size with patient age, sex, height, weight, and shoe size, but none have validated this method using the European shoe sizing system. The primary objective of this study was to determine the correlation between a patient's European shoe size at the time of surgery and the size of the tibial and femoral components used during primary TKA. The secondary objective was to evaluate the accuracy within ±1 size between the European shoe size and the component size.

Methods

This was a retrospective observational, single-centre, single-surgeon study of 227 primary TKA procedures done with the Score II implant (AMPLITUDE®, Valence, France) between 1 April 2022 and 1 July 2023. Data on the patient's shoe size was determined before the surgery. This information was retrospectively correlated with the size of the components used in the TKA surgery that was recorded in the operative report.

Results

The correlation between a patient's shoe size and the component size was very strong: Spearman rho of 0.8095 for femur, 0.8400 for tibia and 0.6393 for patella (p < 0.001). The correlation between a patient's shoe size and the size of the PE insert was weak: Spearman rho 0.1532 (p = 0.0210). After adjusting for sex, the femoral component was predicted accurately within ±1 size in 92% (210/227) of procedures and the tibial component in 94% (213/227). After adjusting for sex and BMI, the patellar implant was predicted accurately within ±1 size in 97% (220/227) of procedures.

Conclusion

Our model provides a cost-effective, assignable and easily implementable method for predicting tibial and femoral component sizes using European shoe size, demonstrating high accuracy (≥92%).

Level of Evidence

Level IV, retrospective observational study.

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鞋的尺寸可以快速、可靠、无成本地预测初次全膝关节置换术中植入物的尺寸

目的了解特定患者在全膝关节置换术（TKA）手术前所需的组件尺寸有助于优化医疗器械可用性的物流。先前的研究将组件尺寸与患者的年龄、性别、身高、体重和鞋码相关，但没有人使用欧洲鞋码系统验证该方法。本研究的主要目的是确定手术时患者的欧洲鞋尺寸与原发性全膝关节置换术中使用的胫骨和股骨假体尺寸之间的相关性。次要目标是评估欧洲鞋码与部件码之间在±1码内的准确性。这是一项回顾性观察性、单中心、单外科医生研究，在2022年4月1日至2023年7月1日期间，使用Score II植入物（AMPLITUDE®，Valence, France）完成227例原发性TKA手术。患者的鞋码数据在手术前确定。这些信息与手术报告中记录的TKA手术中使用的组件的大小回顾性相关。结果患者鞋码与各部件尺寸的相关性非常强：股骨的Spearman rho为0.8095，胫骨为0.8400，髌骨为0.6393 （p < 0.001）。患者的鞋码与PE插入物的大小之间的相关性较弱：Spearman ρ 0.1532 （p = 0.0210）。调整性别后，92%（210/227）的手术预测股骨假体在±1尺寸内准确，94%（213/227）的手术预测胫骨假体在±1尺寸内准确。在调整性别和BMI后，97%（220/227）的手术准确预测髌骨植入物在±1尺寸范围内。结论我们的模型为使用欧洲鞋号预测胫骨和股骨假体大小提供了一种经济、可分配且易于实施的方法，具有较高的准确性（≥92%）。证据等级：IV级，回顾性观察性研究。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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