CClinicalTrials.gg
CompletedNCT03787199Updated Apr 18, 2019

Feasibility of the Overground Bodyweight Supporting Walking System Andago

An interventional study of Andago and Treadmill in Gait Disorders, Neurologic, Cerebral Palsy and Stroke, sponsored by University Children's Hospital, Zurich. Completed at 1 site in Switzerland. Open to participants aged Up to 18 Years. Per ClinicalTrials.gov, last updated 2019-04-18.

Sponsored by University Children's Hospital, Zurich · Not applicable, Interventional, and Device feasibility

Phase
Not applicable
Study type
Interventional
Enrollment
20
Allocation
Non-randomized
Ages
Up to 18 Years
Sex
All
01

Study summary

The overall aim of this project is to investigate the clinical utility of the Andago System, a CE certified mobile bodyweight supporting walking robot, in children with neuromotor disorders. Clinical utility encompasses practicability, acceptability, appropriateness, and accessibility. In this study, the investigators would like to investigate several aspects of clinical utility that belong to the first three components.

Read the detailed description

The specific aims of the current project are:

  1. To investigate the practicability, the investigators plan to determine the accuracy of the weight-supporting system of the Andago and the time needed for donning and doffing. The investigators also evaluate the number of times that the device stops and the nature of these stops (due to errors, sitting of the patient, when preventing falls, or when the patient moves too fast).
  2. To evaluate acceptability, the investigators plan to evaluate differences in motivation and measures reflecting safety (i.e. number of falls prevented) and subjective feeling of safety when patients walk with the Andago compared to walking with their usual walking aids.
  3. To evaluate the appropriateness, the investigators are interested in differences between walking on a treadmill and walking overground with this device or changes that occur during walking overground when changing the level of BWS through the unloading system. Therapists should be aware of these differences to know what the advantage of such a system could be or how adjustments in settings influence the walking pattern. The investigators plan two investigations: (a) To determine differences in stride-to-stride variability, leg muscle activation, hip, knee and ankle joint kinematics and other gait parameters during walking in the Andago (overground) versus walking on a treadmill. (b) To determine differences in the same parameters when walking in the Andago with different levels of BWS. These levels are the minimal required level of BWS to walk without buckling the knees (ref BWS), ref BWS plus 15% and ref BWS plus 30%.

To investigate these aims, the patients will be asked to participate in 3 appointments, which should be scheduled within 10 days.

02

Conditions studied

  • Gait Disorders, Neurologic
  • Cerebral Palsy
  • Stroke
  • Traumatic Brain Injury
  • Child, Only
  • Gait Disorders in Children

Keywords

  • Andago
  • Feasibility
  • Pediatric Neurorehabilitation
03

In context

Brain Injuries

2,113 studies on the registry are indexed under Brain Injuries; 385 are open to participants now.

This study's enrollment of 20 is below the median of 48 across 1,331 interventional studies indexed under Brain Injuries.

Browse Brain Injuries studies →

Lead sponsor

University Children's Hospital, Zurich is the lead sponsor of 92 studies on the registry; 23 are open to participants now.

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

04

Who can participate

Ages eligible
Up to 18 Years
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Neuromotor or orthopaedic disorders
  • taller than 135 cm
  • able to understand simple instructions
  • able to walk 10 meters with or without walking aid
  • maximal age of 18 years (a minimal age is not defined as according to the growth curve, children younger than 7-8 years cannot be included because of insufficient height)
  • given informed consent.

Exclusion criteria

Exclusion Criteria:

  • not consolidated fractures or bone fragility of the lower extremities
  • skin lesions in the harness' area which cannot be protected
  • unstable hip, knee and/or ankle Joints
  • reduced head control or inability to maintain an upright Position
  • inability to communicate discomfort or pain
  • surgery in the last 3 months
  • newly implanted baclofen-pump (or children highly sensitive to it)
  • implanted pacemakers
  • passive knee extension deficit > 30°
  • self-selected walking speed > 3.2 km/h.
  • weight > 135 kg
  • height > 2 m.
05

Study design

Phase
Not applicable
Primary purpose
Device feasibility
Allocation
Non-randomized
Intervention model
Single group
Masking
None (open label)
Enrollment
20 participants (actual)

Study arms

  • Experimental
    Andago

    Application of walking over-ground with body-weight support in the Andago

    Device: Andago

  • Active comparator
    Treadmill

    Application of walking on a treadmill with body-weight support

    Other: Treadmill

Interventions

  • DeviceAndago

    The Andago is a body-weight supporting device with which a patient can walk overground

  • OtherTreadmill

    Bodyweight supported treadmill walking

06

What researchers measure

Primary outcomes

  1. Stride to stride variability

    Variability in stride length recorded during at least 20 steps for each of the following conditions: Andago with reference bodyweight support; Andago with 15% more bodyweight support; Andago with 30% more bodyweight support; and treadmill condition with reference bodyweight support

    Time frame: Appointment 3 (between minute 25 and minute 55 )

Secondary outcomes

  1. Leg muscle activity

    Amplitude of electromyographic recordings recorded during at least 20 steps for each of the following conditions: Andago with reference bodyweight support; Andago with 15% more bodyweight support; Andago with 30% more bodyweight support; and treadmill condition with reference bodyweight support

    Time frame: Appointment 3 (between minute 25 and minute 55 )

  2. Leg joint angles

    Joint angles recorded with electrogoniometers during at least 20 steps for each of the following conditions: Andago with reference bodyweight support; Andago with 15% more bodyweight support; Andago with 30% more bodyweight support; and treadmill condition with reference bodyweight support

    Time frame: Appointment 3 (between minute 25 and minute 55)

Other outcomes

  1. Bodyweight unloading [kg]

    Comparison of bodyweight unloading according to Andago device compared to actual bodyweight unloading measured with scales \[kg\]

    Time frame: Data are obtained during Appointment 2 (between minute 1 and minute 10)

  2. Number of device stops

    Number of Andago device stops measured throughout the habituation periods during appointments 1 and 2

    Time frame: Data are obtained during Appointment 1 between minute 25 and minute 45 and Appointment 2 between minute 10 to 30

  3. Customized questionnaire investigating acceptability [dichotomous]

    Participant is being asked whether the patient prefers treadmill or Andago (dichotomous outcome: 0=treadmill/1=Andago), and if the patient would like to train again in the Andago (0=no/1=yes). No sum score is calculated.

    Time frame: At the end of Appointments 1 (between minute 55-58) and the end of Appointment 2 (between minute 40-43)

  4. Questionnaire acceptability [visual analogue scale]

    How much fun was it training in the Andago? \[score 0=no fun at all to 10=maximal amount of fun\]

    Time frame: At the end of Appointments 1 (between minute 59-60) and the end of Appointment 2 (between minute 44-45)

  5. Time needed for donning and doffing [seconds]

    Time in seconds needed for mounting the patient in the Andago and, at the end of walking in the Andago, the time needed to get the patient out of the device

    Time frame: During Appointment 1 (mounting around minute 25; taking off around minute 43) and Appointment 2 (mounting around minute 1; taking off around minute 28)

  6. Manual Muscle Testing (MMT)

    Manual muscle testing is performed for providing a characterization of the patients. For each muscle group, a score is given between 0 (no visible or palpable contraction) and 5 (patient moves over the full range of motion against gravity with additional maximal resistance). The following muscles will be tested: hip flexors and extensors; hip inner- and outer-rotators; knee flexors and extensors; ankle plantar and dorsal flexors

    Time frame: Appointment 1 between minute 1 and 5

  7. Selective Control Assessment of the Lower Extremity (SCALE)

    The SCALE assesses the selectivity of lower extremity joints. It provides a score between 0 (not able) and 2 (normal selectivity) for each of the following joints: hip, knee, ankle, subtalar joint, and toes. It provides a sum score for the left and right leg separately (0= not able; 10= normal selectivity) and an overall sum score (0=not able; 20=normal selectivity)

    Time frame: Appointment 1 between minute 6 and 15 minutes

  8. Active and passive Range of Motion (ROM) of leg joints

    Active (by patient) and passive (by therapist) mobility of the hip, knee and ankle joints are made in the sagittal plane. The ROM is noted according to the neutral zero method (degrees). ROM testing is performed for providing a characterization of the patients.

    Time frame: Appointment 1 between minute 16 and 20 minutes

  9. 10 meter walk test

    Children walk 14 meters; intermediate 10 meters is time stopped to calculate the walking speed

    Time frame: Appointments 1 between minute 21 and 25 and Appointment 3 between minute 1 and 5 and 56 and 60

07

Study locations

1 site
  • Rehabilitation Center of the University Children's Hospital
    Affoltern Am Albis, Zurich 8910, Switzerland
08

References and documents

Publications

  • van Hedel HJA, Rosselli I, Baumgartner-Ricklin S. Clinical utility of the over-ground bodyweight-supporting walking system Andago in children and youths with gait impairments. J Neuroeng Rehabil. 2021 Feb 8;18(1):29. doi: 10.1186/s12984-021-00827-1. PubMed 33557834 ↗

Individual participant data

Plan to share: Undecided — We have to check with the local ethics committee whether our pseudonymized data can be shared

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Apr 18, 2019, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT03787199
Lead sponsor
University Children's Hospital, Zurich
Collaborators
Lions Club Zürich-Witikon, Mäxi Foundation
Responsible party
Sponsor
First posted
Dec 26, 2018
Start date
May 28, 2018
Primary completion
Mar 19, 2019
Completion
Mar 21, 2019
Last update
Apr 18, 2019

Oversight

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

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