Ultrasound Probe Pressure on the Intratendon Doppler Signal in Patellar Tendinopathy
- Conditions
- Patellar Tendinitis
- Interventions
- Procedure: Intratendon vascularization
- Registration Number
- NCT04682496
- Lead Sponsor
- Cardenal Herrera University
- Brief Summary
In the sports field, patellar tendinopathy is, as a pathology, one of the main concerns for athletes, both because of its incidence and because of the difficulty involved in their recovery. At the ultrasound level, tendinopathies can be divided, depending on the presence or absence of an intratendon Doppler signal, into hypervascular or hypovascular tendinopathy. Its classification is, today and clinically speaking, merely qualitative through the observation of the explorer. The ultrasound evaluation is carried out through a probe that is placed on the patient's skin, the procedure to be followed to obtain a vascular image is merely operator-dependent, that is, the position of the probe, the pressure exerted on the skin or even ultrasound optimization parameters can drastically modify the results.
Due to high pressure on the probe, the intratendon Doppler signal may be diminished in the quantitative variables of area, number of signals, pixel intensity, perimeter, solidity, perfusion index, circularity, major and minor diameter.
From a certain pressure on the probe, the intratendon Doppler signal can be drastically altered.
This study will try to evaluate the influence of the pressure exerted by the examiner with the probe on the quantitative variables of the intratendon Doppler signal in patellar tendinopathy.
To carry out the study, a single group with patellar tendinopathy will be established. Ultrasound evaluations with Doppler mode will be performed on the tendon using different probe pressures, monitoring the applied force and recording the images obtained for later analysis.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 30
- Acceptance of participation in the study.
- Diagnosis of patellar tendinopathy with the presence of an intratendon Doppler signal.
- Subjects between the ages of 18 and 65.
- Present some type of surgical intervention in the region to be explored that could alter in some way the ultrasound evaluation.
- Refer vascular pathology or the intake of medication that may alter blood flow or density.
- Having been treated with sclerosing techniques that can alter the perfusion or vascular resistance of the tendon tissue.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description intratendon vascularization Intratendon vascularization Intratendon vascularization will be quantified using a proprietary methodology using ImageJ 1.47v image analysis software, determining the different variables related to the Doppler signal within an intratendon region of interest.
- Primary Outcome Measures
Name Time Method number of signals (n) during intervention number of intratendon doppler signals (unit)
Perimeter (mm) during intervention perimeter of the intratendon Doopler signal (mm)
Solidity during intervention measures the density of an object (0-1 Units on a scale)
Resistance index during intervention resistance index of intratendon Doppler signals (0-1 Units on a scale)
Force during intervention force applied by the probe on the knee during the scan (N)
major diameter (mm) during intervention major diameter of the intratendon Doppler signal (mm)
Area (mm^2) during intervention intratendon Doppler signal area (mm\^2)
Average pixel intensity (0-255 Units on a scale) during intervention average pixel color intensity (0-255 Units on a scale)
minor diameter (mm) during intervention minor diameter of the intratendon Doppler signal (mm)
Circularity during intervention measure of roundness or circularity, area-to perimeter ratio. (0-1 Units on a scale)
- Secondary Outcome Measures
Name Time Method Age (years) Post-intervention subject's age (years)
Time of evolution (months) months time since the patient had the first symptoms (months)
Pain location Immediately pre-intervention Location of pain in the patellar tendon (lower pole of the patella-body of the tendon-insertion in the anterior tuberosity of the tibia)
hours of training (hours) Immediately pre-intervention Current training hours per week (hours). This question is asked just before the intervention in order to relate the results of the Doppler quantification with the hours of training performed
Dominance post-intervention Dominant leg (right-left)
Victorian Institute of Sport Assessment-Patella (VISA-P) Immediately pre-intervention Knee pain and function rating scale (0-100 Units on a scale). The maximum score possible is 100 points and represents an asymptomatic athlete who can fully engage in sports. The theoretical minimum is 0 point. The test is carried out just before the intervention to relate the results of the Doppler quantification with the severity of the pain.
Time without training (months) Immediately pre-intervention time without training (months). This question is asked just before the intervention.
Sex (female or male) post-intervention subject's sex (female or male)
Trial Locations
- Locations (1)
Ceu Cardenal Herrera University
🇪🇸Elche, Alicante, Spain