Ultrasound Probe Pressure on the Intratendon Doppler Signal in Patellar Tendinopathy

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2020-12-18

Study Completion Date

2023-02-07

Brief Summary

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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.

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Detailed Description

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Conditions

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Patellar Tendinitis

Study Design

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Allocation Method

NA

Intervention Model

SINGLE_GROUP

Primary Study Purpose

OTHER

Blinding Strategy

NONE

Study Groups

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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.

Group Type EXPERIMENTAL

Intratendon vascularization

Intervention Type PROCEDURE

Ultrasonic exploration by power-Doppler of the intratratendon vascularization, making longitudinal cuts of the patellar tendon and with previously pre-established Doppler optimization parameters for all patients. The optimization parameters of the power-Doppler signal will be set at a Doppler frequency of 6.7 MHz, pulse repetition frequency (PRF) of 0.7 kHz. The lowest wall filter and a standardized gain just below the level that produces random noise will be applied. This examination will be repeated several times with different probe pressures, which will be quantitatively adjusted through the force sensor and maintained with the articulated arm. A 4-second static video will be recorded of the longitudinal section that presents a higher Doppler signal in each of the scans at different probe pressures.

Interventions

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Intratendon vascularization

Ultrasonic exploration by power-Doppler of the intratratendon vascularization, making longitudinal cuts of the patellar tendon and with previously pre-established Doppler optimization parameters for all patients. The optimization parameters of the power-Doppler signal will be set at a Doppler frequency of 6.7 MHz, pulse repetition frequency (PRF) of 0.7 kHz. The lowest wall filter and a standardized gain just below the level that produces random noise will be applied. This examination will be repeated several times with different probe pressures, which will be quantitatively adjusted through the force sensor and maintained with the articulated arm. A 4-second static video will be recorded of the longitudinal section that presents a higher Doppler signal in each of the scans at different probe pressures.

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* 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.

Exclusion Criteria

* 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.

Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No