Body-powered hand prosthesis with low operating power for children.

Area of Science:

• Pediatric Rehabilitation
• Biomedical Engineering
• Prosthetics and Orthotics

Background:

• Children with unilateral below-elbow amputations often face challenges with traditional prosthetic devices.
• Existing prostheses may require significant muscle strength, which is typically insufficient in young children for effective operation.

Purpose of the Study:

• To develop and evaluate a novel elbow-controlled prosthetic hand for pediatric unilateral below-elbow amputees.
• To address the limitations of low triceps muscle power in children by designing a low-operating-power mechanism.

Main Methods:

• Development of a specialized prosthetic hand with a unique low-power activation mechanism.
• Integration of a mechanism that utilizes elbow extension to control hand grip and opening.
• Inclusion of a stiff spring for a strong grip and a weaker spring for opening the hand.

Main Results:

• Successful development of an elbow-controlled hand prosthesis suitable for children.
• The prosthesis incorporates a mechanism that allows activation with minimal triceps power.
• Initial trials with six pediatric users demonstrated positive engagement and feedback.

Conclusions:

• The developed elbow-controlled prosthetic hand offers a viable solution for children with below-elbow amputations.
• The low-operating-power mechanism effectively overcomes the strength limitations in young users.
• User enthusiasm has driven further improvements and redesign of the system.