Validation of the Dynamometer LABIN

Study Overview
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Brief Summary
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The main objective of this work is to validate the dynamometer LABIN in comparison with the technique of gold-standard reference JAMAR, in a healthy population. The infringement of the prehension is frequent and impacts on the social and professional quality of life of the patients. There are numerous instruments measuring the strength of prehension. The JAMAR is a mechanical, hydraulic dynamometer, exploring in kilograms the maximal strength of the prehension. It is at present Gold Standard for the measure of the strength of prehension. There is for the moment no electronic known instrument exploring the endurance of the strength of prehension during an effort of tightening. This parameter would indeed be interesting for the exploration in geriatrics and in the neuromuscular pathologies. This study justifies itself by the fact that the dynamometer LABIN should allow the evaluation of the muscular endurance of the strength of hand as complement of the peak of strength

Detailed Description
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Measure of the strength of prehension with JAMAR and LABIN according to the following protocol: Position: the subject sits comfortably on a chair without armrests, feet put on the ground, the pond at the bottom of the seat, the hips and the knees in 90 ° of flexion, shoulder in adduction and neutral rotation, the elbow bent in 90 °, forearm in neutral position, the wrist between 0 and 30 ° of extension and between 0 and 15 ° of slope ulnaire. The dynamometer is vertically presented and in front of the forearm to maintain the standardized positions. Test: regulation of the zero by making a vacuous acquisition during 5 seconds. The order Jamar then Labin or Labin then Jamar is chosen by randomization. The operator encourages the subject to every test. The subject does not see the curve displaying. Test: 3 clampings of a handle of a dynamometer LABIN by the right hand during 5 seconds, with a break of 30 seconds between the tests. After 2 minutes of break the subjects make 3 clampings with a left hand. After that , the same session is realized with the dynamometer JAMAR The order Jamar then Labin or Labin then Jamar is chosen by randomization. The operator encourages the subject to every test. The subject does not see the curve displaying. Total duration of participation in the study for the patient: 30 minutes Main analysis: the calculation of the coefficient of correlation (Pearson or Spearman with regard to the statistical distribution), coefficient of linen concordance and the coefficient of intra-classy correlation.

Official Title
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Validation of the Dynamometer LABIN

Conditions
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Healthy Volunteers

Intervention / Treatment
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* Device: Dynamometer LABIN


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age : > 20 years and <60 years Professionally active Right-handed(right-wing) or left-handed person Volunteer Subjects have given its consent in writing to participate in the study Exclusion Criteria: Subjects with a trauma or surgery of the upper limb Subjects with a diabetes Subjects with a dysthyroïdie Subjects with a neurological disease Subjects with a syndrome canalaire of the upper limb Subjects with a cutaneous disorders(confusions) of the cognitive upper

Ages Eligible for Study
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Minimum Age: 20 Years
Maximum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Diagnostic
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Jamar then Labin<br>The order of the using of the dynamometers Jamar then Labin or Labin then Jamar is chosen by randomization | Device: Dynamometer LABIN<br>* LABIN is a prototype of dynamometer containing a handle of metal strength, connected with a sensor of pressure registering(recording) the applied strength and transmitting the data in a computer showing an IT curve of the strength according to time.<br>|
| Experimental: Labin then Jamar<br>The order of the using of the dynamometers Jamar then Labin or Labin then Jamar is chosen by randomization | Device: Dynamometer LABIN<br>* LABIN is a prototype of dynamometer containing a handle of metal strength, connected with a sensor of pressure registering(recording) the applied strength and transmitting the data in a computer showing an IT curve of the strength according to time.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Measure of the strength of prehension (in Kg). | measure of the strength of prehension in kilogram by using of the JAMAR ( hydraulic dynamometer), and the LABIN (electronic dynamometer provided with a sensor of pressure). | at day 1 | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The comfort of the using the dynamometer LABIN | A note of discomfort on Simple Verbal Scale from 0 to 10 (max.) is attributed by the subject | at day 1 | 
| muscular endurance, estimated by dynamometer LABIN preservation of the strength for the LABIN | Change from baselin in measure muscular endurance (The calculation of the horizontal length under the graphic curve which will be exploited by the colleagues of the IUT) | at day 1 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Dynamometer mechanic, Strength of prehension, Comparison, Device, Diagnosis, Healthy Volunteers