Ankle Dynamometer
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General Information
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| Objectives |
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Precise measurement of isometric flexion and extension strength of the ankle joint.
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| Category of Outcome Measure |
Pathology
Impairment
Functional
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| Chronology of Development |
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No commercially avaible dynamometer allows the precise evaluation of flexion and extension strength generated around the ankle joint (Biodex is able to perform these measurements but with a much lower precision (0.7 Nm) and with a protocol that does not seem adapted for the assessment of weak patients). First prototype in 2006. Normative database under development on 450 healthy subjects from 5 to 80. Repeatability and reproducibility study on 120 healthy subjects ongoing (Hogrel, 2008). Also used in the natural history study of patients suffering from a calpainopathy and for a FSHD cell therapy (on going trial).
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| Time to Complete |
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from 10 to 60 min (depending on protocol: number of muscles tested, of exercises, rest periods...)
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| Mode of Assessment |
Administered by trained evaluator
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| Age Group |
Children (2 to 11 Years)
Adolescents (12 to 15 Years)
Adults (16 Years and Over)
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| Age Related Limitations |
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Must be able to understand.
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| Languages |
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Original |
Definitive Validated Translation |
Informal Translation |
| French |
X |
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| Conditions of Use and Contact Information |
| Conditions of Use |
Free Access
Require Author's Written Permission
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| Organisation Name |
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Institut de Myologie (AIM)
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| Postal Address |
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GH Pitié-Salpêtrière, Bâtiment Babinski, 47/83 Bd de l'Hôpital, Paris Cedex 13, 75651, France
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Device
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| Description |
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The device is made of a foot plate under which two precision load cells are fixed. From each load cell is attached the extremity of a strap. This strap is then tighten over the fifth metacarpal joint (for ankle flexion) or over the knee (for ankle extension). The full scale is 200 daN; the accuracy is 0.1 daN and the sensitivity is 0.01 daN. Force values (in N) are converted into torque values (Nm) by measuring the lever arm.
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| Purpose/Use |
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The ankle device allows the measurement of the strength generated around the ankle joint during voluntary isometric contractions in the flexion/extension directions. Fatigue assessment during static contractions and timed tests are also possible with devoted softwares.
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| Organisation Name |
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Institut de Myologie (AIM)
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| Address |
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GH Pitié-Salpêtrière, Bâtiment Babinski, 47/83 Bd de l'Hôpital, Paris Cedex 13, 75651, France
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| Instruction Manual Availability |
An instruction manual is available
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Reference 1
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| Reference Details |
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Hogrel JY,; (2008) Assessment of flexion and extension torques of wrist and ankle using specific dynamometers, Proc Myology 2008,
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Reference 2
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| Reference Details |
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Ankle dynamometer instructions of use, Institut de Myologie (AIM)
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