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A Comparison Between Ischial-Containment and Sub-Ischial Prosthetic Sockets to Determine Their Effects on Secondary Health Conditions

12 sierpnia 2026 zaktualizowane przez: VA Office of Research and Development
Long-term above-knee prosthesis users are at an increased risk of developing secondary musculoskeletal conditions compared to the general able-bodied population. One secondary physical concern is low back pain (LBP), for which the development is not entirely understood, but in above-knee prosthesis users it is believed to relate to asymmetries and compensations that are typically demonstrated and required to stand and walk. Understanding spinal motion and compensations will enhance our knowledge of the factors contributing to LBP, and possibly lead to the development of new prosthetic and therapeutic interventions to prevent or alleviate LBP, thereby improving mobility and quality of life for prosthesis users.

Przegląd badań

Status

Jeszcze nie rekrutacja

Warunki

Szczegółowy opis

The purpose of this study is to investigate and compare the effects of the standard ischial containment (IC) socket to a sub-ischial (SI) socket design on the spinal and pelvic motions and leg length (LLD) discrepancies of transfemoral prosthesis users. Data will be collected from 2 groups of transfemoral prosthesis users (15 SI socket wearers and 15 IC socket wearers) and a group of 15 able-bodied (AB) control participants. Gait and standing analyses will be conducted on each participant using a marker based motion capture system. Prosthesis users will wear their own conventional sockets for the gait and standing analyses. Kinematic and kinetic data will be analyzed for differences between the 2 groups of socket wearers and will also be compared to the control group.

The specific aims and hypotheses of this project are:

Aim 1: To measure dynamic leg length and kinematics of the pelvis and spinal segments in unilateral, transfemoral prosthesis users during gait. Quantitative motion analyses will be performed on two groups of 15 research participants with lower limb amputation using 2 different socket designs (IC and SI) walking over level ground at three self-selected walking speeds (normal, moderately fast, fastest). Data will be compared between socket type and to an AB control group. Hypothesis 1a-IC socket wearers will have a greater anterior pelvic tilt compared to SI socket wearers and AB controls, and they will exhibit considerably greater rotations of the pelvis and spinal segments during walking. Hypothesis 1b-The EMG activity of the lumbar erector spinae for SI socket users will better approximate the patterns of AB controls as compared to IC socket wearers. Hypothesis 1c-The dynamic LLD will be greater for IC socket users compared to SI socket wearers and AB controls.

Aim 2: To measure pelvic orientation and static leg length in unilateral, transfemoral prosthesis users during standing. A multi-segment model of the spine and pelvis will be used to determine neutral spinal, pelvis, and prosthetic alignment during standing for the research and AB control participants. Hypothesis 2a-IC socket wearers will demonstrate greater anterior pelvic tilt during standing compared to SI socket wearers and control participants. Hypothesis 2b-The prosthetic and sound leg lengths for both prosthesis user groups will be within 1.0 cm of each other during standing.

Aim 3: To estimate joint contact forces in the legs and lower back of unilateral, transfemoral prosthesis users and controls during gait. Computational musculoskeletal simulations will be used to comprehensively evaluate the data from Aim 1 to compare the lumbar joint loads between IC and SI socket wearers. Hypothesis 3-IC socket wearers will exhibit greater lumbar joint loads than SI socket wearers.

Typ studiów

Obserwacyjny

Zapisy (Szacowany)

45

Kontakty i lokalizacje

Ta sekcja zawiera dane kontaktowe osób prowadzących badanie oraz informacje o tym, gdzie badanie jest przeprowadzane.

Kontakt w sprawie studiów

Kopia zapasowa kontaktu do badania

Lokalizacje studiów

    • Illinois
      • Chicago, Illinois, Stany Zjednoczone, 60612
        • Jesse Brown VA Medical Center, Chicago, IL
        • Kontakt:
        • Kontakt:
        • Główny śledczy:
          • Rebecca Stine, MS

Kryteria uczestnictwa

Badacze szukają osób, które pasują do określonego opisu, zwanego kryteriami kwalifikacyjnymi. Niektóre przykłady tych kryteriów to ogólny stan zdrowia danej osoby lub wcześniejsze leczenie.

Kryteria kwalifikacji

Wiek uprawniający do nauki

  • Dorosły
  • Starszy dorosły

Akceptuje zdrowych ochotników

Tak

Metoda próbkowania

Próbka bez prawdopodobieństwa

Badana populacja

Thirty unilateral transfemoral prosthesis users (15 with an ischial containment socket and 15 with a sub-ischial socket) and 15 able-bodied control participants.

Opis

Inclusion Criteria:

For all participants:

  • Ability to complete the experimental protocol without undue fatigue or health risks
  • Low Back Pain scale assessment (0-10) less than 4 (activities of daily living or quality of life not impacted)

In addition for persons with lower limb amputation:

  • Prosthesis user for a minimum of 2 years with their current socket design
  • Good fit with either an ischial containment (IC) or sub-ischial (SI) socket
  • Good skin integrity on their residual limb upon visual inspection
  • Does not require the use of assistive devices to walk

Exclusion Criteria:

  • Previously diagnosed with a spine condition (e.g., pinched nerve, bulging disc, etc.)
  • Previously diagnosed with an orthopedic or neuromuscular condition that may affect walking or balance (e.g., ankle fusion, Parkinson's disease, stroke, etc.)

Plan studiów

Ta sekcja zawiera szczegółowe informacje na temat planu badania, w tym sposób zaprojektowania badania i jego pomiary.

Jak projektuje się badanie?

Szczegóły projektu

Kohorty i interwencje

Grupa / Kohorta
Ischial Containment Socket user
Person with unilateral transfemoral amputation wearing an ischial containment socket
Sub-Ischial Socket user
Person with unilateral transfemoral amputation wearing a sub-ischial socket
Able-bodied control
Person without an amputation

Co mierzy badanie?

Podstawowe miary wyniku

Miara wyniku
Opis środka
Ramy czasowe
Anterior Pelvic Tilt Angle Between the IC Socket wearers and the SI Socket wearers/Able-Bodied Controls
Ramy czasowe: To be measured on day 1 of the single study visit, within an estimated 3-hour timeframe
Anterior Pelvic Tilt will be calculated for all participants during the walking and standing trials. Participants will walk along a 10 meter walkway at varying speeds. Quantitative motion analysis using a marker based motion measurement system will be used to calculate anterior pelvic tilt.
To be measured on day 1 of the single study visit, within an estimated 3-hour timeframe

Miary wyników drugorzędnych

Miara wyniku
Opis środka
Ramy czasowe
Electromyography (EMG) Activity of the Lumbar Erector Spinae Between the IC Socket wearers and the SI Socket wearers/Able-bodied Controls
Ramy czasowe: To be measured on day 1 of the single study visit, within an estimated 3-hour timeframe
EMG activity will be assessed using surface electrodes attached bilaterally to the erector spinae at and below T12/L1 and on the external oblique muscle. Data will be collected during the quantitative motion analysis.
To be measured on day 1 of the single study visit, within an estimated 3-hour timeframe
Lumbar Flexion Between the IC Socket wearers and the SI Socket wearers/Able-bodied Controls
Ramy czasowe: To be measured on day 1 of the single study visit, within an estimated 3-hour timeframe
Lumbar flexion will be calculated for all participants during the walking and standing trials. Participants will walk along a 10 meter walkway at varying speeds. Quantitative motion analysis using a marker based motion measurement system will be used to calculate anterior pelvic tilt.
To be measured on day 1 of the single study visit, within an estimated 3-hour timeframe
Hip Joint Range of Motion (ROM) between the IC Socket wearers and the SI Socket wearers/Able-bodied Controls
Ramy czasowe: To be measured on day 1 of the single study visit, within an estimated 3-hour timeframe
Hip Joint ROM will be calculated for all participants during the walking trials. Participants will walk along a 10 meter walkway at varying speeds. Quantitative motion analysis using a marker based motion measurement system will be used to calculate hip joint ROM.
To be measured on day 1 of the single study visit, within an estimated 3-hour timeframe
Dynamic Leg Length Discrepancy (LLD) Between the IC Socket wearers and the SI Socket wearers/Able-bodied Controls
Ramy czasowe: To be measured on day 1 of the single study visit, within an estimated 3-hour timeframe
Dynamic LLD will be calculated for all participants during the walking trials. Participants will walk along a 10 meter walkway at varying speeds. Quantitative motion analysis using a marker based motion measurement system will be used to calculated dynamic LLD.
To be measured on day 1 of the single study visit, within an estimated 3-hour timeframe
Peak Lumbar Joint Loading Between the IC Socket wearers and the SI Socket wearers/Able-bodied Controls
Ramy czasowe: To be measured on day 1 of the single study visit, within an estimated 3-hour timeframe
Lumbar joint loading during walking will be analyzed by performing musculoskeletal modeling simulations using data collected during the quantitative motion analysis.
To be measured on day 1 of the single study visit, within an estimated 3-hour timeframe

Współpracownicy i badacze

Tutaj znajdziesz osoby i organizacje zaangażowane w to badanie.

Sponsor

Śledczy

  • Główny śledczy: Rebecca Stine, MS, Jesse Brown VA Medical Center, Chicago, IL

Daty zapisu na studia

Daty te śledzą postęp w przesyłaniu rekordów badań i podsumowań wyników do ClinicalTrials.gov. Zapisy badań i zgłoszone wyniki są przeglądane przez National Library of Medicine (NLM), aby upewnić się, że spełniają określone standardy kontroli jakości, zanim zostaną opublikowane na publicznej stronie internetowej.

Główne daty studiów

Rozpoczęcie studiów (Szacowany)

1 stycznia 2027

Zakończenie podstawowe (Szacowany)

1 lipca 2030

Ukończenie studiów (Szacowany)

31 grudnia 2030

Daty rejestracji na studia

Pierwszy przesłany

4 sierpnia 2026

Pierwszy przesłany, który spełnia kryteria kontroli jakości

12 sierpnia 2026

Pierwszy wysłany (Rzeczywisty)

17 sierpnia 2026

Aktualizacje rekordów badań

Ostatnia wysłana aktualizacja (Rzeczywisty)

17 sierpnia 2026

Ostatnia przesłana aktualizacja, która spełniała kryteria kontroli jakości

12 sierpnia 2026

Ostatnia weryfikacja

1 sierpnia 2026

Więcej informacji

Terminy związane z tym badaniem

Inne numery identyfikacyjne badania

  • RRD2-014-25W

Plan dla danych uczestnika indywidualnego (IPD)

Planujesz udostępniać dane poszczególnych uczestników (IPD)?

NIE

Informacje o lekach i urządzeniach, dokumenty badawcze

Bada produkt leczniczy regulowany przez amerykańską FDA

Nie

Bada produkt urządzenia regulowany przez amerykańską FDA

Nie

produkt wyprodukowany i wyeksportowany z USA

Nie

Te informacje zostały pobrane bezpośrednio ze strony internetowej clinicaltrials.gov bez żadnych zmian. Jeśli chcesz zmienić, usunąć lub zaktualizować dane swojego badania, skontaktuj się z register@clinicaltrials.gov. Gdy tylko zmiana zostanie wprowadzona na stronie clinicaltrials.gov, zostanie ona automatycznie zaktualizowana również na naszej stronie internetowej .