Study of Venous Outflow From the Lower Limbs in Patients With Pelvic Varicosities
Trial statusRecruiting
Trial phaseNot listed
Trial typeObservational
Biological sexFemale
Age18-40
SponsorPirogov Russian National Research Medical University
About this trial
Compression therapy is basic treatment for chronic venous disease (CVD) of the lower limbs. Numerous studies have demonstrated the efficacy and safety of compression therapy in relieving symptoms such as pain, venous edema, leg heaviness and fatigue, as well as accelerating the healing of venous ulcers. It has been established that сompression therapy is indicated for patients with both minimally expressed manifestations of CVD and severe forms of the disease. At the same only one study has been conducted to assess the correction of venous outflow from the lower limbs and pelvis in patients with pelvic varicose vein (PVV) and pelvic congestion syndrome (PCS). However, the incidence of this pathology ranges from 15 to 30% in the female population. The cost to the healthcare system of treating these patients in the United States exceeds $2 billion. To date, the options and indications for compression therapy in patients with concomitant PVV and CVD have not been defined. The rational use of compression in this cohort of patients may contribute to the improvement of effective conservative treatment. In addition, inappropriate prescription of compression to patients with pelvic venous disease (which can be observed in real clinical practice) may discredit this simple, effective and safe therapeutic method. In addition, the research devoted to the problem of compression treatment of PVV will contribute to the development of new special compression products aimed at accelerating venous outflow from the pelvic organs. It can be assumed that this will serve as a stimulus for obtaining new data on the therapeutic effects of compression and create conditions for the creation of new technological directions in the production of compression knitwear.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Patient age from 18 to 40 years;
Presence of pelvic varicose veins according to DUS data;
Reflux in the pelvic veins for more than 1 second before this DUS;
Reflux in the superficial veins of the lower limbs.
Disqualifiers
Menopause;
Pregnancy;
Postthrombotic disease;
Suspicion of May-Turner syndrome;
Trial population
The study will consecutively include 90 female patients, including 80 patients with PVV and 10 patients without PVV. All patients will have a clinical examination and DUS of the veins of the pelvis and lower limbs, regardless of the presence or absence of clinical manifestations of diseases of the veins of the pelvis and lower limbs. Аll patients were performed radionuclide venography of the lower limbs and emission computed tomography (SPECT) of the pelvic veins with in vivo-labelled red blood cells (RBCs). Based on the results of radionuclide venography and SPECT, quantitative indicators of the work of the lower limbs MVP will be calculated (average transport time RPH) and Cpvc.
Trial design
Design model
Cohort
Time perspective
Prospective
Treatments tested in this trial
Radionuclide venography
Diagnostic testWith the patient in an upright position, 370 MBq of 99mTc pertechnetate is injected into one of the dorsal veins of the foot after applying a tourniquet in the area of the ankle joint. Then, with the help of a gamma camera detector, the movement of the radiopharmaceutical is monitored in the following segments: tibial (muscular-venous pump of the lower leg), popliteal, femoral and iliocaval. To study the evacuation function of the muscular-venous pump (MVP) of the leg, using an analytical computer program, areas of interest are identified in the tendon, muscle parts of the veins of the leg and the popliteal vein. The time of evacuation of the radiopharmaceutical from the MVP of the leg is estimated - the average transport time of the isotope.
single-photon emission computed tomography
Diagnostic testSPECT of the pelvic veins with in vivo-labelled red blood cells (RBCs). For radionuclide assessment of the state of the pelvic veins, 2 ml of Perfotech solution is injected into the cubital vein for subsequent "labeling" of red blood cells in vivo. In 20 minutes. 370 MBq of 99mTc-pertechnetate is injected into one of the veins of the dorsum of the foot and radionuclide venoscintigraphy is performed according to the method presented above. 20 minutes after the administration of the radiopharmaceutical and the venography, SPECT of the pelvic veins is performed. Tomography of the distribution of labeled erythrocytes in the pelvic veins is carried out in a circular orbit with the gamma camera detector rotated 360°. The analysis of the obtained information is carried out using the standard ECT Protocol software package, which allows obtaining sections in 3 projections (sagittal, transversal and coronal) with a slice step of 8 mm.
Treatment groups
90 Participants
are divided into 3 treatment groupsGroup A: Symptomatic pelvic varicose veins (PVV)2 interventions
Group B: Asymptomatic PVV2 interventions
Group C: varicose veins of the lower limb2 interventions
Trial outcomes
Primary outcomes
1
The average transport time of the isotope
Average transport time of the isotope is a value inversely proportional to the volumetric velocity of blood flow. The greater the average transport time of the isotope, the slower the speed of blood flow through the deep veins of the leg and vice versa. In addition, the linear speed of blood flow through the tibial veins is calculated. The data obtained allow us to judge the function of the MVP of the lower leg.
Time frame
Day 0 and Day 102
coefficient of the pelvic venous congestion
The computer equipment of the gamma camera allows you to calculate the number of pulses from the area of interest. The radiopharmaceutical radiation activity is recorded by the gamma camera in pulses per second. Pulse per second is a quantitative expression of the content of labeled red blood cells in the area of interest. Taking into account the different speed of blood flow in the pelvic veins in different patients and in order to objectify the data obtained, the ratio of pulse counts from 2 standard areas of interest is used - the veins of the uterus and parametrium and the common iliac vein on either side. This ratio is called coefficient of the pelvic venous congestion(Сpvc). The activity of labeled erythrocytes in this vessel is the most stable value. The activity of erythrocyte-phosphate-pertechnetate complexes in the venous plexuses depends on the presence of their varicose transformation and the deposition of blood in them.
Time frame
Day 0Sponsors and contacts
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Source ClinicalTrials.gov