A preliminary study of an ultrasound-based method for measuring talar displacement during the anterior drawer stress test using a Telos device
Conventionally, X-ray examination has been performed to quantify the instability of the ankle joint. The aim of this study was to evaluate the reliability and validity of a new ultrasound-based examination for the quantitative detection of ankle instability, and whether the present examination could replace the conventional X-ray test.
Thirteen adults were recruited for this validation study and were divided into two groups: a control group (eight adults, 16 feet) and an ankle instability (AI) group (five adults, eight feet). The control group had Cumberland Ankle Instability Tool (CAIT) scores ≥ 25 points, and the AI group had CAIT scores < 25 points. Anterior drawer stress tests were performed using a Telos device with ultrasound (0–150 N) and X-ray (0, 120, and 150 N). The stress ultrasound was performed by two examiners, and changes in the anterior talar displacement were measured by two measurers. The inter-examiner and inter-measurer reliabilities were calculated in the control group, and correlations between stress ultrasound and conventional stress X-ray imaging results were examined at 120 and 150 N in both the control and AI groups.
Ultrasound imaging detected changes in the anterior talar displacement under loads greater than 70 N. The inter-examiner and inter-measurer reliability of the ultrasound-based method were moderate and excellent, respectively, at 150 N. The tibiotalar distances observed with X-ray and ultrasound imaging at 120 N were highly correlated in the AI group.
The ultrasound-based method was comparable to the conventional X-ray method and represents a novel radiation-free method for the detection of ankle instability. This method has the potential for clinical application to quantitatively evaluate mechanical instability.
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Posted 17 Dec, 2020
Received 28 Jan, 2021
On 18 Dec, 2020
Invitations sent on 17 Dec, 2020
On 17 Dec, 2020
On 14 Dec, 2020
On 14 Dec, 2020
On 14 Dec, 2020
On 09 Dec, 2020
A preliminary study of an ultrasound-based method for measuring talar displacement during the anterior drawer stress test using a Telos device
Posted 17 Dec, 2020
Received 28 Jan, 2021
On 18 Dec, 2020
Invitations sent on 17 Dec, 2020
On 17 Dec, 2020
On 14 Dec, 2020
On 14 Dec, 2020
On 14 Dec, 2020
On 09 Dec, 2020
Conventionally, X-ray examination has been performed to quantify the instability of the ankle joint. The aim of this study was to evaluate the reliability and validity of a new ultrasound-based examination for the quantitative detection of ankle instability, and whether the present examination could replace the conventional X-ray test.
Thirteen adults were recruited for this validation study and were divided into two groups: a control group (eight adults, 16 feet) and an ankle instability (AI) group (five adults, eight feet). The control group had Cumberland Ankle Instability Tool (CAIT) scores ≥ 25 points, and the AI group had CAIT scores < 25 points. Anterior drawer stress tests were performed using a Telos device with ultrasound (0–150 N) and X-ray (0, 120, and 150 N). The stress ultrasound was performed by two examiners, and changes in the anterior talar displacement were measured by two measurers. The inter-examiner and inter-measurer reliabilities were calculated in the control group, and correlations between stress ultrasound and conventional stress X-ray imaging results were examined at 120 and 150 N in both the control and AI groups.
Ultrasound imaging detected changes in the anterior talar displacement under loads greater than 70 N. The inter-examiner and inter-measurer reliability of the ultrasound-based method were moderate and excellent, respectively, at 150 N. The tibiotalar distances observed with X-ray and ultrasound imaging at 120 N were highly correlated in the AI group.
The ultrasound-based method was comparable to the conventional X-ray method and represents a novel radiation-free method for the detection of ankle instability. This method has the potential for clinical application to quantitatively evaluate mechanical instability.
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