Prophylaxis and Treatment of Sensorimotor Functional Impairments Following Finger Amputations

Status:

ongoing

Aims:

The goals of this research project are to improve treatment following finger amputations and to develop a predictive model for amputation-related pain. The primary focus is on preventing chronic pain after amputation and evaluating an app-based vibrotactile training approach that provides sensory stimulation during finger movements. The intervention is based on a smartphone application that delivers vibrotactile feedback while patients interact with the touchscreen. After completion of the project, this approach could also be implemented as a self-training program for patients. By enabling earlier and more effective treatment as well as identifying individuals at increased risk for persistent pain, the project aims to reduce treatment costs and work absenteeism associated with chronic post-amputation pain. Upon completion of the study, a scientifically evaluated, efficient, and cost-effective eHealth training concept for rehabilitation after finger amputations will be available, with the potential for implementation in other clinics.

Activities/Methods:

For the evaluation of the app-based training with vibration feedback, a total of 202 patients will be included: 103 individuals in the acute phase following finger amputation and 99 individuals undergoing rehabilitation due to persistent amputation-related pain. Participants will be randomly assigned to two groups. One group will perform a standardized occupational therapy self-exercise program (control group), while the other group will train using a smartphone application that provides vibrotactile feedback during interaction.

At baseline, assessments will include grip strength, range of motion, overall hand function, fine motor skills, and two-point discrimination. In addition, standardized questionnaires will assess quality of life, functional impairments of the upper extremity, cold intolerance, and neuropathic pain. These assessments will be repeated at follow-up visits after three and twelve months.

For the development of the predictive model, an additional cohort of 650 individuals with recent finger amputation will be included, regardless of whether they are in the acute treatment phase or already undergoing rehabilitation. The same assessments will be conducted; however, follow-up in this part of the study will be limited to postal questionnaires six months after surgery.

The collected data will allow a direct comparison between the vibrotactile app-based training and conventional self-exercise programs.

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