Determining the Potential Benefit of Powered Prostheses

Amputation, Traumatic Clinical Trial

Official title:

Determining the Potential Benefit of Powered Prostheses

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02828982
• Other study ID #: HUM00080734
• Status: Completed
• Phase: N/A
• Start date: July 2016
• Est. completion date: August 2019

Study information

• Verified date: January 2022
• Source: University of Michigan
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The goal of this research is to determine the effectiveness of a powered prosthesis compared to an unpowered prosthesis during short bouts of walking, extended periods of walking (to fatigue), and performance in the community.

Description:

Many individuals are living in the United States with limb loss. With the use of a prosthetic device many individuals can stay active, but most do not achieve a medically desired physical activity level. This creates a risk for cardiovascular disease. It is thought that individuals with amputation walk less because it is more difficult to get around, and recent advances in robotic prosthetic technology may make such activities easier. However, these prostheses have not yet been evaluated to determine their effectiveness during extended periods of walking. Despite the goals in design of new devices it is unclear whether individuals using them are able to incorporate them into making daily activities easier. Therefore, the goal of this research is to determine the effectiveness of a powered prosthesis compared to an unpowered prosthesis during long periods of walking.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 12
• Est. completion date: August 2019
• Est. primary completion date: August 2019
• Accepts healthy volunteers: No
• Gender: All
• Age group: 21 Years and older

Eligibility

Inclusion Criteria:

• Adult (over 21 years old), Has unilateral transtibial amputation, has used prosthesis for at least 6 months, is currently using an unpowered prosthesis, can walk unassisted for at least 10 minutes

Exclusion Criteria:

• History of orthopedic or neurologic disorders to their intact limb, history of cardiovascular disease that prevents them from safely completing requested activities, unable to walk for 30 minutes at a time

Related Conditions & MeSH terms

• Amputation, Traumatic
• Unilateral Traumatic Amputation

Intervention

Device:
• Powered ankle prosthesis
This device is a commercially available powered ankle prosthesis, (BioM, Bionx, Bedford, MA) which was given FDA device exempt status.
• Dynamic Response Foot
This condition is a sham condition as the participant will wear the prosthesis they were clinically prescribed and usually wear.

Locations

Country	Name	City	State
United States	University of Michigan	Ann Arbor	Michigan

Sponsors (1)

Lead Sponsor	Collaborator
Deanna H Gates

Country where clinical trial is conducted

United States, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Metabolic Cost of Walking	Metabolic costs will be measured using a portable metabolic system when participants walk on a treadmill at a fixed speed.	Testing took place after wearing the prostheses for two weeks
Primary	Total Steps Outside the Home Over a Two Week Period	Activity data we be collected using activity monitors and GPS with both the regular prosthesis and the powered ankle prosthesis. Each activity monitoring period will last 2 weeks and will be done within in a 2 month period. Daily step count taken outside of the home, determined using an activity monitor and GPS device	2 weeks
Primary	Quality of Life (QoL) on a Short-Form 36	Participants completed the Medical Outcomes Study 36 Items Short-Form Health Survey (SF-36) after each condition. Each scale is directly transformed into a 0-100 scale on the assumption that each question carries equal weight. The lower the score the more disability.	Questionnaire completed 2 weeks after wearing each prosthesis
Secondary	Prosthetic Evaluation Questionnaire (PEQ)	Participants completed a survey to evaluate their prosthetic satisfaction (Prosthetic Evaluation Questionnaire) after each condition. Most questions in the PEQ use a visual analog scale format. Each visual analog scale is scored as a continuous numerical variable measured as the distance in millimeters from the left endpoint of the line (0 mm) to the point at which the respondent's mark crosses the line (up to 100 mm). The questions are all worded so that a higher number (toward the right) will correspond with a more positive response.; Ambulation - Greater number = increased perceived ambulation Appearance - Greater number = better appearance Frustration - Greater number = less frustration Perceived Response - Greater number = increased perceived response Residual Limb Health - Greater number = better residual limb health Social burden - Greater number = less social burden Sounds - Greater number = less sound Utility - Greater	Questionnaire completed 2 weeks after wearing each prosthesis
Secondary	Muscle Activity in the Lower Limb	Participants walk on a treadmill while muscle activity from various lower limb muscles are monitored using electromyography. We calculated the integrated EMG (iEMG) for each muscle collected as the total activity in that muscle as a percentage of the maximum signal.	Testing took place after the participant wore the prosthesis for 2 weeks
Secondary	Time to Fatigue	Participants walk on a treadmill at a fast speed until they felt they can no longer continue. The time to fatigue was recorded.	Testing took place after wearing the prostheses for two weeks