ArticleKnee surgery, sports traumatology, arthroscopy : official journal of the ESSKA2015
Novel approach to dynamic knee laxity measurement using capacitive strain gauges.
Article in Knee surgery, sports traumatology, arthroscopy : official journal of the ESSKA, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- Digital measurement of anterolateral knee laxity using strain sensors.Archives of orthopaedic and trauma surgery · 2023Article
- Optical Measurement of Ligament Strain: Opportunities and Limitations for Intraoperative Application.Sensors (Basel, Switzerland) · 2023Review
- Laxity measurement of internal knee rotation after primary anterior cruciate ligament rupture versus rerupture.Archives of orthopaedic and trauma surgery · 2022Article
- Smart Brace for Static and Dynamic Knee Laxity Measurement.Sensors (Basel, Switzerland) · 2022Article
- Batch Fabrication of a Polydimethylsiloxane Based Stretchable Capacitive Strain Gauge Sensor for Orthopedics.Polymers · 2022Article
- A Deep Learning Approach to Non-linearity in Wearable Stretch Sensors.Frontiers in robotics and AI · 2019Article
- Skin-mountable stretch sensor for wearable health monitoring.Nanoscale · 2016Article
Corrections and comments
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Authors and funding
8 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeKnee joint laxities are observed in patients after severe trauma to the joint, resulting in ligament tears. Specifically, injuries to the anterior cruciate ligament may cause a significant instability. The degree of these laxities is essential in diagnostics and may affect which treatment option is suggested.
methodsPolydimethylsiloxane (PDMS) strain gauges are proposed as a non-invasive, highly accurate and easy-to-use measurement method to quantify anterolateral and rotational laxities of the knee joint during active and passive motion. In this work, proof-of-concept measurements and a prototype of the proposed device are displayed. The measurements were taken using a knee test rig, which has specifically been designed for this purpose. This apparatus allows the simulation of isolated knee joint instabilities with a motor-controlled model of a human knee.
resultsThe absolute sensitivity [Formula: see text] of an exemplary sensor was determined to be 2.038 [Formula: see text]; the relative sensitivity [Formula: see text] was 1.121 [Formula: see text]. Optimal positions of sensors to capture bone-to-bone displacement as projected displacement on the skin were identified.
conclusionPDMS strain gauges are capable of measuring bone-to-bone displacements on the skin. We present an experimental in vitro study using an artificial knee test rig to simulate knee joint laxities and display the feasibility of our novel measurement approach.
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