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Title: Reproducibility of an intraoperative pressure sensor in total knee replacement.
Epworth Authors: Fary, Camdon
de Steiger, Richard
McKenzie, Dean
Keywords: Intraoperative Pressure Sensor
Total Knee Replacement
Arthroplasty, Replacement, Knee
Knee Arthroplasty
Ligament Balancing
Soft Tissue Tension
Musculoskeletal Clinical Institute, Epworth HealthCare, Victoria, Australia
Issue Date: Nov-2021
Publisher: MDPI
Citation: Sensors (Basel) . 2021 Nov 18;21(22):7679
Abstract: Appropriate soft tissue tension in total knee replacement (TKR) is an important factor for a successful outcome. The purpose of our study was to assess both the reproducibility of a modern intraoperative pressure sensor (IOP) and if a surgeon could unconsciously influence measurement. A consecutive series of 80 TKRs were assessed with an IOP between January 2018 and December 2020. In the first scenario, two blinded sequential measurements in 48 patients were taken; in a second scenario, an initial blinded measurement and a subsequent unblinded measurement in 32 patients were taken while looking at the sensor monitor screen. Reproducibility was assessed by intraclass correlation coefficients (ICCs). In the first scenario, the ICC ranged from 0.83 to 0.90, and in the second scenario it ranged from 0.80 to 0.90. All ICCs were 0.80 or higher, indicating reproducibility using a IOP and that a surgeon may not unconsciously influence the measurement. The use of a modern IOP to measure soft tissue tension in TKRs is a reproducible technique. A surgeon observing the measurements while performing IOP may not significantly influence the result. An IOP gives additional information that the surgeon can use to optimize outcomes in TKR.
DOI: 10.3390/s21227679
PubMed URL:
ISSN: 1424-8220
Journal Title: Sensors
Type: Journal Article
Affiliated Organisations: The University of Melbourne, Parkville, Australia
Department of Health Sciences and Biostatistics, Swinburne University of Technology, Hawthorn, Australia
Department of Orthopaedics, Western Hospital, Melbourne, Australia.
Appears in Collections:Musculoskeletal

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