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Effectiveness of Kneehab in Strengthening Quadriceps in Rehabilitation Post Anterior Cruciate Ligament (ACL) Reconstruction (NMES)

This study has been completed.
Information provided by:
Bio-Medical Research, Ltd. Identifier:
First received: August 19, 2008
Last updated: September 16, 2008
Last verified: September 2008

Prospective, controlled, randomized, single blind study in patients undergoing rehabilitation following anterior cruciate ligament reconstruction. 96 patients were randomly assigned to one of three groups. Group Group KH (Kneehab n=33)trained with a new type of NMES with multipath activation for 20 minutes, 3 times per day, 5 days per week for 12 weeks; Group PS (Poli-Stim n=29) trained with standard neuromuscular electrical stimulation (NMES) for 20 minutes per day, 5 days per week for 12 weeks; Group CO (Control - n=34), which did not use muscle stimulation, performed voluntary isometric quadriceps muscle contractions. Patients receiving either form of NMES treatment were instructed to isometrically contract the quadriceps muscle voluntarily with each electrical muscle stimulation. All three groups superimposed this training schedule on the standard post-ACL reconstruction rehabilitation protocol used at the clinic.

The study design corresponded to a two-way variance analysis with three groups and 4 examination times (Baseline, 6 weeks, 12 weeks and 24 weeks post ACL reconstruction). The level of significance was set at 5%. The key indicators of the quadriceps muscle training intervention were the isokinetic strength development of the extensors of the injured leg at 90 degrees/second and 180 degrees/second and the distance achieved by participants performing the single-leg hop and the time to complete the shuttle run. The target was to show a difference of 10% in the relative distance jumped for the single-leg hop and for the isokinetic strength tests and a 1.2 second difference in the time to complete the shuttle run. The target of 3 weeks was set for participants to achieve full weight-bearing capability without use of a walking aid. A comparison between the groups of the time for return to usual work activities was planned.

Condition Intervention Phase
Anterior Cruciate Ligament Reconstruction Device: Kneehab Device: Poli-Stim Behavioral: Control Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Single Group Assignment
Masking: Single (Outcomes Assessor)
Primary Purpose: Treatment
Official Title: The Effectiveness of Kneehab in Strengthening the Quadriceps of Patients in Rehabilitation After Anterior Cruciate Ligament Reconstruction

Resource links provided by NLM:

Further study details as provided by Bio-Medical Research, Ltd.:

Primary Outcome Measures:
  • Isokinetic strength test of extension of the injured leg. Relative strength extension ratio (injured/uninjured). Distance of the jump achieved in the single leg hop and the time to achieve the shuttle run. [ Time Frame: 12 weeks ]

Secondary Outcome Measures:
  • Strength test of flexors of the knee joint and 5 tests of coordination and proprioception (triple hop; side-step; carioca; timed hop and cross-over hop). [ Time Frame: 12 weeks ]

Enrollment: 131
Study Start Date: April 2005
Study Completion Date: October 2006
Primary Completion Date: October 2006 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: KH
Kneehab is a garment integrated NMES device with multipath technology.
Device: Kneehab
Program of NMES 3 times per day, five days per week for 12 weeks.
Other Name: Kneehab K024258
Active Comparator: PS
Poli-Stim, a standard NMES device, used for 3 times per day, five days per week for 12 weeks.
Device: Poli-Stim
Poli-Stim is standard NMES which the patients used for 20 minutes, 3 times per day, 5 days per week for 12 weeks.
Active Comparator: CO
Control group performed voluntary muscle contractions for 20 minutes 3 times per day, 5 days per week for 12 weeks.
Behavioral: Control
Voluntary quadriceps muscle contractions.
Other Name: Voluntary muscle contractions

Detailed Description:
Single center, prospective, controlled, randomized, single blind study in 96 patients following anterior crucial ligament (ACL)reconstruction to compare the effect of adding traditional NMES or garment-integrated NMES to a standard post-surgery rehabilitation program. In both cases the NMES was superimposed on isometric voluntary muscle contractions.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Persons who had surgical reconstruction of the anterior cruciate ligament
  • Persons with additional treatment of minor miniscal defects
  • Persons who were willing and able to provide Informed Consent

Exclusion Criteria:

  • Persons who had multi-ligament reconstruction
  • ACL patients with a microfracture or extra burden on the knee
  • Persons who registered pain above level 3 on the IKDC subjective evaluation pain scale questions, 3 days after surgery
  • Participants in a volunteer study within the previous ninety (90) days
  • Persons with serious cardiac arrhythmias or other implanted devices
  • Persons with cardiac pacemakers
  • Persons with neurological or psychiatric disorders
  • Persons who are pregnant or breastfeeding
  • Intake of drugs that interfere with the neuromuscular system
  • Persons with epilepsy
  • Any condition or history which in the opinion of the Principal Investigator might increase the risk to an individual or interfere with the evaluation of data
  Contacts and Locations
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Please refer to this study by its identifier: NCT00738010

ATOS Clinic
Heidelberg, Germany, D-69115
Sponsors and Collaborators
Bio-Medical Research, Ltd.
  More Information


Responsible Party: Dr. Hans Paessler, Atos Clinic Identifier: NCT00738010     History of Changes
Other Study ID Numbers: BMR 04 2001
Study First Received: August 19, 2008
Last Updated: September 16, 2008

Keywords provided by Bio-Medical Research, Ltd.:
Atrophy Prevention
Accelerated Recovery
Knee Surgery processed this record on September 21, 2017