Safety and Efficacy of Vibro-tactile Feedback for Patients Who Underwent Lower Limb Amputation

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

TERMINATED

Clinical Phase

NA

Total Enrollment

18 participants

Study Classification

INTERVENTIONAL

Study Start Date

2021-10-25

Study Completion Date

2022-05-06

Brief Summary

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Prosthetics research has grown recently, focusing on bionic approaches that restore bodily functions with technical aids. One method involves using prostheses with feedback systems, which measure physical parameters and provide additional information to the user. Saphenus has developed a feedback system called Suralis© that transfers pressure signals from the prosthetic sole to another body region. This clinical investigation aimed to determine if this system improves gait stability and walking. The study analyzed changes in gait and functional balance and gathered patient-reported measures to evaluate the quality of life.

This research was open to individuals who have undergone below-knee amputation but no targeted re-innervation surgery and use prosthetics. Participants received the Suralis© feedback system, and the investigators assessed their walking activities. The system measures prosthetic foot sole pressure and converts it into digital signals, triggering vibration stimuli during the stance phase of walking. The investigators collected gait analyses and patient feedback to assess the impact of the feedback system on prosthetic management. The results will help us understand the benefits and effectiveness of this technology for people with amputation.

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Detailed Description

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The investigators conducted a prospective, unblinded crossover trial to compare the effectiveness of a vibration intervention with no intervention. Participants were randomly assigned to one of two sequences: vibration intervention followed by no intervention or vice versa. The intervention involved using the Suralis© vibrotactile ground-contact feedback system for 60 days. The system transmitted ground contact information to the residual lateral thigh, providing sensory feedback. During the control phase, participants received no additional intervention. The washout period lasted seven days. The study collected data during four visits, assessing gait and patient-reported measures. Bayesian generalized linear mixed models were used for data analysis, considering fixed effects (intervention, sequence, and period) and random effects (individuality).

Conditions

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Amputation of Lower Limb Below Knee Unilateral

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

CROSSOVER

Primary Study Purpose

SUPPORTIVE_CARE

Blinding Strategy

NONE

Study Groups

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Control-Vibration

Participants were assessed before and after 60 days of no additional intervention to any ongoing treatment, after seven days of washout, and after receiving 60 days of vibrotactile ground-contact feedback.

Group Type ACTIVE_COMPARATOR

vibrotactile ground-contact feedback

Intervention Type DEVICE

Suralis®, Saphenus Medical Technology (Baden, Lower Austria, Austria)

Vibration-Control

Participants were assessed before and after receiving 60 days of vibrotactile ground-contact feedback, after seven days of washout, and after 60 days of no additional intervention to any ongoing treatment.

Group Type ACTIVE_COMPARATOR

vibrotactile ground-contact feedback

Intervention Type DEVICE

Suralis®, Saphenus Medical Technology (Baden, Lower Austria, Austria)

Interventions

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vibrotactile ground-contact feedback

Suralis®, Saphenus Medical Technology (Baden, Lower Austria, Austria)

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* male, female, and diverse individuals
* unilateral transtibial amputation
* at least 18 months post surgery
* walking without aids possible
* signed informed consent form

Exclusion Criteria

* insufficient thigh sensation to distinguish between the two closest vibrotactile actuators
* an acute event that restricts the walking ability
* interfering lesions or painful conditions
* undergone targeted re-innervation surgery
* poor stump condition
* used a non-modular prosthesis
* used a prosthesis in poor condition
* conditions preventing safe participation or interfering with study objectives
* not able to not comply with the protocol

Minimum Eligible Age

18 Years

Maximum Eligible Age

90 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No