Back to Trials
NCT07454356NARecruiting

Knee Flexionater to Avoid Motion Restoring Surgery

Ermi LLC

Start Date

12/9/2025

Completion Date

12/1/2029

Summary

The goal of this clinical trial is to learn whether adding a stretching device to standard physical therapy can help people regain knee bending after total knee replacement surgery. Some people have difficulty bending their knee during recovery. When this happens, doctors may recommend another procedure called motion-restoring surgery to improve knee movement. This study aims to answer two main questions. First, does adding a hydraulic high-intensity stretching device to physical therapy help people regain knee bending after surgery? Second, does using the device affect recovery, daily activities, or the chance of needing another procedure? Researchers will compare two treatment approaches. One group will receive standard physical therapy alone. The other group will receive standard physical therapy and will also use a hydraulic high-intensity stretching device called the Ermi Knee Flexionater at home. Participants who receive the device will use it at home each day in addition to attending their physical therapy sessions. Researchers will measure how well participants can bend their knee and will ask questions about pain, daily function, and activity level. Participants will also complete simple walking and mobility tests. Study visits will occur about four weeks after surgery when participants enroll, and again at about eight weeks, twelve weeks, six months, one year, and two years after surgery. Researchers will compare results between the two groups to see whether the stretching device improves recovery after knee replacement.

Eligibility Criteria

Age Range: 40 years to No maximum

Inclusion Criteria: * Age 40 years or older * Undergoing primary total knee replacement surgery * Knee flexion less than 105 degrees at approximately 4 weeks after surgery * Considered a candidate for motion-restoring surgery, with any surgery delayed until after 2 months of nonoperative treatment Exclusion Criteria: * Not willing to participate * Diagnosis of advanced rheumatoid arthritis * Neurological deficit affecting the operative leg * Revision total knee replacement or previous major surgery on the same knee * Cognitive impairment * Prior total hip replacement on the same side (ipsilateral total hip arthroplasty) * Living more than 2 hours from the study site or unwilling to attend required local physical therapy visits

Interventions

DEVICE

Hydraulic high Intensity Stretch Device

OTHER

Standard Physical Therapy

Interested in This Trial?

Contact the trial locations directly using the information below to learn more about enrollment.

Expressing interest lets you review the study and consent before we connect you with the research site.

Conditions

Joint ContracturesTotal Knee AnthroplastyKnee Arthrofibrosis

Locations

INOV8 Orthopedics

Houston, Texas 77043

United States