Use of the DEKA Arm for amputees with brachial plexus injury: A case series

Abstract

Objective: Patients with upper limb amputation and brachial plexus injuries have high rates of prosthesis rejection. Study purpose is to describe experiences of subjects with transhumeral amputation and brachial plexus injury, who were fit with, and trained to use, a DEKA Arm.

Methods: This was a mixed-methods study utilizing qualitative (e.g. interview, survey) and quantitative data (e.g. self-report and performance measures). Subject 1, a current prosthesis user, had a shoulder arthrodesis. Subject 2, not a prosthesis user, had a subluxed shoulder. Both were trained in laboratory and participated in a trial of home use. Descriptive analyses of processes and outcomes were conducted.

Results: Subject 1 was fitted with the transhumeral configuration (HC) DEKA Arm using a compression release stabilized socket. He had 12 hours of prosthetic training and participated in all home study activities. Subject 1 had improved dexterity and prosthetic satisfaction with the DEKA Arm and reported better quality of life (QOL) at the end of participation. Subject 2 was fit with the shoulder configuration (SC) DEKA Arm using a modified X-frame socket. He had 30 hours of training and participated in 3 weeks of home activities. He reported less functional disability at the end of training as compared to baseline, but encountered personal problems and exacerbation of PTSD symptoms and withdrew from home use portion at 3 weeks. Both subjects reported functional benefits from use, and expressed a desire to receive a DEKA Arm in the future.

Discussion: This paper reported on two different strategies for prosthetic fitting and their outcomes. The advantages and limitations of each approach were discussed.

Conclusion: Use of both the HC and SC DEKA Arm for patients with TH amputation and brachial plexus injury was reported. Lessons learned may be instructive to clinicians considering prosthetic choices for future cases.

Conflict of interest statement

Competing Interests: The authors have declared that no competing interests exist.

Figures

Fig 1. Subject 1 residual limb.

Fig 2. Subject 1 personal prosthesis.

Fig 3. Subject 2 posterior view of residual limb.

Fig 4. Subject 1.

Final Prosthetic Socket Used for the Study: A. Interior View B. Posterior View, C. Lateral View.

Fig 5. Dynamic Socket Controller (DSC).

Fig 6

Subject 1 Wearing the DEKA Arm A. Anterior View B. Lateral View C. Posterior View D. Lateral view of socket showing fenestrations.

Fig 7. Subject 2 left transhumeral amputee fit with an SC DEKA arm.

A. Interior View. B. Posterior View.

Fig 8. Subject 2 wearing the DEKA Arm and socket.

A. Anterior View, B Lateral View, C. Posterior View.