1. Upper Limb Prostheses Study of prosthetic hand FERRANDINI Emilie ESIL - GBM 3 Mr. BRUNET - Mr. DANIELS - Mr. FRAJUT Study of prosthetic hand

2. 2 Synopsis Introduction. Active Prostheses. Study of the hand. Hydraulic hand prosthesis. Evolutions. Conclusion.

3. 3 Introduction 85 000 people with just one hand in Europe. Causes : accident, war, disease … First prostheses : only cosmetic. 1960 : first functional prosthetic hand. Two main types : –passive prostheses. –active prostheses.

4. 4 Active Prostheses Body-powered prostheses Requirements –possess at least one gross body movement –sufficient residual limb and musculature Active ProsthesesStudy of the HandHydraulic Hand ProsthesisEvolutions

5. 5 Active Prostheses Electrically powered prostheses Use of small electrical motors. Myoelectric control : most popular. Active ProsthesesStudy of the HandHydraulic Hand ProsthesisEvolutions

6. 6 Study of the Hand Hand anatomy Movement and rotation around 3 axes. Flexion and extension of each finger. Thumb opposition. Study of the HandHydraulic Hand ProsthesisEvolutionsActive Prostheses

7. 7 Study of the Hand Hand Representation Degrees of freedom (DOF) –Interphalangeal : 1 DOF –Metacarpophalangeal : 2 DOF –Thumb : 2 DOF –Wrist : 6 DOF Study of the HandHydraulic Hand ProsthesisEvolutionsActive Prostheses

8. 8 Hydraulic Hand Prosthesis Patients needs –An increase of functionality. –A reduction of weight. –A better cosmetic appearance. –A tactile feedback system. Other requirements –Low power consumption. –Compactness. Hydraulic Hand ProsthesisEvolutionsActive ProsthesesStudy of the Hand

9. 9 General Considerations Why hydraulic system ? Weight requirements. Power Cosmetic Feedback signal Hydraulic Hand ProsthesisEvolutionsActive ProsthesesStudy of the Hand micropump

10. 10 Ultralight Prosthesis Pump and valves far away from the hand. Reduced stress Lightness impression Hydraulic Hand ProsthesisEvolutionsActive ProsthesesStudy of the Hand

11. 11 Multifunctional Prosthesis Hydraulic Hand ProsthesisEvolutionsActive ProsthesesStudy of the Hand

12. 12 Evolutions Communication with prostheses. Feedback system. Prosthesis attachment. EvolutionsActive ProsthesesStudy of the HandHydraulic Hand Prosthesis

13. 13 Evolutions Reduction of energy consumption. EvolutionsActive ProsthesesStudy of the HandHydraulic Hand Prosthesis

14. 14 Conclusion Only Cosmetic Difficult design  Simplest functions New technologies and materials Importance of patient’s needs

15. 15 Thank You For Your Attention