Pioneering Innovations in Prosthetics: Dual-Mode Terminal Devices

At Marins Med, we believe that continuous innovation is key to developing user-centric solutions for upper-limb amputees. One of the most exciting advancements in the field of prosthetics is the development of dual-mode prosthetic terminal devices. These devices offer significant improvements in functionality and user experience, as highlighted in a recent study published in the Journal of Rehabilitation Research and Development (JRRD).

Exploring the Dual-Mode Prosthetic Terminal Device

Traditionally, body-powered prosthetic devices are designed to operate in either voluntary opening (VO) or voluntary closing (VC) modes. VO devices are default-closed and require the user to apply force to open the grip, while VC devices close when force is applied. Each mode has specific advantages, making the choice between VO and VC difficult for users who need the benefits of both.

The innovative dual-mode prosthetic terminal device, designed by Jon W. Sensinger, PhD, PEng, and his team, allows users to switch seamlessly between VO and VC modes. This design ensures that the thumb position and movement direction remain constant in both modes, eliminating the need for harness readjustment.

Key Features and Benefits

 

1. Enhanced Versatility
   • The ability to switch between VO and VC modes enables users to choose the       most effective mode for each task, enhancing their ability to perform a wide range of activities efficiently.

 

 

1. Improved Control
   • VC mode allows for precise grip force adjustments, which is crucial for       delicate tasks, while VO mode offers consistent grip with minimal effort, ideal for holding objects for extended periods.

 

 

1. Reduced Fatigue
   • By enabling users to switch to the most suitable mode for each activity, the       dual-mode device helps reduce muscle fatigue, especially during prolonged       use.

 

 

1. Natural and Intuitive Use
   • The design of the dual-mode device mimics natural hand movements, making it       more intuitive and comfortable for users.

 

 

1. Robust and Practical Design
   • The device features a rugged split-hook design, ensuring durability and       reliability for daily use in various environments.

 

Research Findings

The study conducted by Sensinger and colleagues involved both subjects with intact arms and those with amputations. Participants used the dual-mode device to perform the Southampton Hand Assessment Procedure (SHAP). Key findings include:

 

• Participants performed significantly better when allowed to switch between VO and VC modes, scoring 4 to 7 points higher on average compared to using a single      mode.
• The device's consistent thumb position and movement direction facilitated easier transitions and more efficient use.

 

Implications for Prosthetic Design

The dual-mode prosthetic terminal device represents a significant leap forward in prosthetic technology. By combining the benefits of both VO and VC modes, this device offers greater control, flexibility, and comfort. The study’s findings underscore the potential for such innovations to improve functional outcomes and enhance the quality of life for individuals with limb loss.

Marins Med ProHensor (ProHook): Incorporating a Self-Actuated Locking Mechanism

As part of our ongoing commitment to innovation, Marins Med's ProHensor (ProHook) stands out by incorporating a self-actuated locking mechanism. This feature ensures a stronger and more sustainable hold, enhancing the device's functionality and reliability. The self-actuated locking mechanism allows users to maintain a secure grip without continuous effort, thereby reducing fatigue and increasing efficiency in daily tasks. This advancement aligns with our mission to improve prosthetic acceptance and provide durable, user-centric solutions.

Conclusion

While Marins Med does not provide dual-mode prosthetic terminal devices, we are committed to supporting and promoting advancements in prosthetic technology. Innovations like the dual-mode prosthetic terminal device highlight the importance of developing user-centric solutions that enhance the lives of upper-limb amputees. By staying informed about the latest research and technological advancements, we can better advocate for and contribute to the ongoing evolution of prosthetic care.

For more information on our latest developments in prosthetic technology and our commitment to innovation, visit Marins Med.

Stay connected with Marins Med for the latest updates and insights into the world of medical technology and prosthetics. If you have any questions or need further information, please feel free to contact us.

 

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Note: This blog post is based on the research article "Design and Evaluation of Voluntary Opening and Voluntary Closing Prosthetic Terminal Device" by Jon W. Sensinger, PhD, PEng, and colleagues, published in the Journal of Rehabilitation Research and Development (JRRD).