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NCT Number: NCT06988917

Rehabilitation Efficacy of Low-Load Blood Flow Restriction Training for Lateral Patellar Compression Syndrome

The purpose of this study is to understand the effect of low-load blood flow restriction training on the rehabilitation effect of patients after lateral patellar compression syndrome surgery, and to observe the differences between low-load blood flow restriction training combined with conventional rehabilitation training and conventional rehabilitation training. The main question it aims to answer is:

Can low-load blood flow restriction training improve the rehabilitation effect of patients after surgery for lateral patellar hypertension syndrome? Researchers compared conventional rehabilitation training with conventional rehabilitation training combined with low-load blood-limiting training to explore the effect of blood-limiting training combined with conventional rehabilitation training on the lower extremity function of patients after lateral patellar compression syndrome surgery, providing experimental and theoretical basis for formulating rehabilitation training programs.

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Key information

Conditions

Lateral Patellar Compression Syndrome

Age range

30 year–60 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Peking University Third Hospital of Chongli

Chongli, Hebei, China

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Aged 30-60 years with a Visual Analog Scale (VAS) score ≥3;
  • Diagnosed with lateral patellar compression syndrome confirmed by MRI and clinical evaluation, having undergone arthroscopic lateral retinacular release surgery;
  • Presenting postoperative reduction in thigh circumference on the affected side, accompanied by quadriceps muscle atrophy and decreased muscle strength;
  • Minimum postoperative duration of ≥2 weeks, with signed informed consent and demonstrated ability to comply with the study protocol.

Exclusion criteria

  • Patients with concomitant fractures or other ligament injuries (including those with prior ACL reconstruction);
  • Individuals presenting with severe osteoarthritis or rheumatoid arthritis;
  • Those with medical histories of deep vein thrombosis, coagulation disorders, vascular diseases, or diabetes mellitus;
  • Subjects with active infections, malignancies, current pregnancy, or psychiatric disorders.

Treatment and study plan

the regular rehabilitation program

Behavioral

Each training session consists of a 10-minute warm-up (including power cycling, full-body stretching, etc.) At the same time, use the foam axis to relax the lateral oblique femoris and iliotibial band to relieve the pressure on the lateral side of the patella), 40 minutes of formal training (including wall squats with a ball, straight leg raising resistance training, terminal resistance knee extension training, bench kick ball clamping training, and balance training), and 10 minutes of relaxation (using a foam roller, foam axis and other combined techniques to relax the muscles Especially for the lower limb muscles such as the lateral femoris, iliotibial band, and tibialis anterior muscle.

The blood flow limiting pressure band

Device

The experimental group (LL-BFRT group) wore a flow-limiting pressure band for exercise during routine rehabilitation training. The blood flow limiting pressure band used in this study mainly consists of a 109*10cm leg pressure band, a barometric display dial with a pressure range of 0-300mmHg, and a pressure pump. In the experiment, we fixed the blood flow restriction pressure band in the area for measuring the circumference and adjusted the blood flow restriction pressure according to the thigh circumference of the subjects to maintain it within the range of 40%-60% arterial occlusion pressure. The way to limit blood flow is intermittent inflation, that is, during the intervals of muscle strength training, the cuff deflation operation is carried out simultaneously.

Primary outcomes

  1. Lysholm score

    Time frame: 0-4week

  2. VAS score

    Time frame: 0-4week

  3. Peak torque of knee extension

    Time frame: 0-4week

  4. Quadriceps thickness

    Time frame: 0-4week

Secondary outcomes

  1. Thigh circumference

    Time frame: 0-4week

  2. Range of motion of the knee joint

    Time frame: 0-4week

Sponsors and collaborators

Lead sponsor

Peking University Third Hospital

Other

Registry information

Acronym: LL-BFRT

Important dates

Study start
2024
Primary completion
2024
Study completion
2024
First posted
May 25, 2025
Registry last updated
May 25, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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