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CompletedNCT03046394ProStoUpdated May 4, 2017

Comparison Between Three Types of Prosthetic Feet

An interventional study of C-SACH and B-DER in Amputation; Traumatic, Leg, Lower, Between Knee and Ankle, sponsored by University Rehabilitation Institute, Republic of Slovenia. Completed at 1 site in Slovenia. Open to male participants aged 20 Years to 60 Years. Per ClinicalTrials.gov, last updated 2017-05-04.

Sponsored by University Rehabilitation Institute, Republic of Slovenia · Not applicable, Interventional, and Device feasibility

Phase
Not applicable
Study type
Interventional
Enrollment
1
Allocation
Randomized
Ages
20 Years to 60 Years
Sex
Male
01

Study summary

One Solid Ankle Cushion Heel (SACH) and two Dynamic Elastic Response (DER) prosthetic feet will be tried six times in random order by the patient. The patient will be an active prosthetic foot user who walks several kilometers per day and was amputated at the trans-tibial level because of injury. Gait pattern will be rated in comparison with the patient's previous prosthetic foot by a physiatrist, physiotherapist, prosthetist and the patient. One-leg standing and 10-meter walking tests will also be performed.

Read the detailed description

The prosthetic feet will be: one SACH foot (by Otto Bock - foot C, advertised for activity category 1) and two DER feet (Dynamic Motion by Otto Bock - foot B, advertised for activity category 2-3; and Triton by Otto Bock - foot A, advertised for activity category 3-4).

All the prosthetic feet are of the same size and chosen for the patient's weight. They will be covered so that neither the patient nor professionals will be able to see which prosthetic foot is being used.

The study is blinded because the prosthetist designated for changing the prosthetic feet will be the only one who will know which prosthetic is being used. The orientational sample size calculation and the randomisation plan were prepared by a statistician.

The first trial will be performed using the patient's own prosthetic foot in order to establish a baseline. The patient will then have to to compare the prosthetic feet with his own existing prosthetic foot and rate the ability to walk on even terrain (100m), uneven terrain (grass, 100m), decline and incline (i.e., slope), and up and down the stairs (one floor) on a five-point Likert-type scale (-2 much worse, -1 slightly worse, 0 the same, 1 slightly better, 2 much better). After each trial he will also perform the one-leg standing test (with three repetitions) and the 10-meter walking test. Before each trial, the patient will be given 15 minutes for adaptation to each new prosthetic foot without the presence of the assessors.

The three expert observers will be: a physical and rehabilitation medicine specialist physician, a certified prosthetist-orthotist, and a physiotherapist. Each has got over 20 years of experience in rehabilitation of patients after amputation and observation of their gait. They will be blind to the currently used prosthetic foot. They will follow the patient and assess his walking using the same rating scale in comparison with the initial trial as the patient.

02

Conditions studied

  • Amputation; Traumatic, Leg, Lower, Between Knee and Ankle

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Keywords

  • prosthetic feet
  • gait pattern
  • one leg standing
  • walking speed
03

In context

Amputation, Traumatic

101 studies on the registry are indexed under Amputation, Traumatic; 14 are open to participants now.

This study's enrollment of 1 is below the median of 13 across 68 interventional studies indexed under Amputation, Traumatic.

Browse Amputation, Traumatic studies →

Lead sponsor

University Rehabilitation Institute, Republic of Slovenia is the lead sponsor of 21 studies on the registry; 7 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
20 Years to 60 Years
Sexes eligible
Male
Accepts healthy volunteers
No

Inclusion criteria

  • active prosthetic foot user who walks several kilometers per day
  • amputation at the trans-tibial level >5 years ago

Exclusion criteria

Exclusion Criteria:

  • other medical problems
05

Study design

Phase
Not applicable
Primary purpose
Device feasibility
Allocation
Randomized
Intervention model
Sequential assignment
Masking
Triple (Participant, Investigator, Outcomes assessor)
Enrollment
1 participant (actual)

Study arms

  • Active comparator
    C-SACH

    All the interventions will be administered to the patient in this single-subject trial, each 6 times

    Device: C-SACH

  • Active comparator
    B-DER

    All the interventions will be administered to the patient in this single-subject trial, each 6 times

    Device: B-DER

  • Active comparator
    A-DER

    All the interventions will be administered to the patient in this single-subject trial, each 6 times

    Device: A-DER

Interventions

  • DeviceC-SACH

    Solid Ankle Cushion Heel by Otto Bock, advertised for activity category 1

  • DeviceB-DER

    Dynamic Motion by Otto Bock, advertised for activity category 2-3

  • DeviceA-DER

    Triton by Otto Bock, advertised for activity category 3-4

06

What researchers measure

Primary outcomes

  1. Rating

    Likert-type, compared to the patient's existing prosthetic foot (-2 much worse, -1 slightly worse, 0 the same, 1 slightly better, 2 much better)

    Time frame: Immediately after each trial

Secondary outcomes

  1. The time that the patient can stand on the prosthetic foot

    Measured by the one-leg standing test (average of three repetitions)

    Time frame: Immediately after the rating, repeated 3 times

  2. Walking velocity

    Measured by the 10-meter walking test

    Time frame: Immediately after the one-leg standing test

07

Study locations

1 site
  • University Rehabilitation Institute, Republic of Slovenia
    Ljubljana, 1000, Slovenia
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on May 4, 2017, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03046394
Lead sponsor
University Rehabilitation Institute, Republic of Slovenia
Responsible party
Sponsor
First posted
Feb 8, 2017
Start date
Feb 6, 2017
Primary completion
Feb 10, 2017
Completion
May 3, 2017
Last update
May 4, 2017

Study contacts

Helena Burger, MD, PhD
principal investigator · University Rehabilitation Institute, Republic of Slovenia

Oversight

Data monitoring committee
Yes
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in May 2017. You cannot join it, but the record below documents what was studied.

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