ClinicalTrials.gg
CompletedNCT03413618RIDILOTT-DVTUpdated Feb 4, 2021Results posted

Rivaroxaban With Diosmin in Long-term Treatment of Deep Vein Thrombosis

A Phase 4 interventional study of Rivaroxaban and Diosmin in Deep Vein Thrombosis and Postthrombotic Syndrome, sponsored by Pirogov Russian National Research Medical University. Completed at 1 site in Russian Federation. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2021-02-04.

Primary conditionPostthrombotic SyndromeRegistry: Venous ThrombosisReclassifiedWhy we changed it
Registry
Venous Thrombosis — the first condition term the registry derived for this study.
ClinicalTrials.gg
Postthrombotic Syndrome
Why
  1. The study's listed conditions name Postthrombotic Syndrome, a narrower term within Venous Thrombosis.
Confidence
High: the new condition is named in the study's own listed conditions. Of 351 hand-checked studies reclassified this way, 68% were exactly right and 84% in the right disease family; the registry's first term was right for 5% (measured 2026-10-21). How we classify →
Wrong?
Tell us the study's main condition →

Sponsored by Pirogov Russian National Research Medical University · Phase 4, Interventional, and Treatment

Phase
Phase 4
Study type
Interventional
Enrollment
90
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The randomized clinical study aimed to assess the efficacy and safety of standard anticoagulation with rivaroxaban in combination with diosmin compared to the isolated use of standard rivaroxaban for prolonged therapy of acute femoro-popliteal deep vein thrombosis reflected the speed of deep vein recanalization and incidence of post-thrombotic syndrome.

Read the detailed description

Deep vein thrombosis is an acute inflammatory disease that affects vein wall and leads to the structural changes in the wall and valves reflected with chronic venous insufficiency that called postthrombotic syndrome (PTS).

Diosmin as a flavonoid agent has properties to reduce leukocyte-endothelial interaction and inflammatory response, that could reduce the damage to venous wall and valves.

The hypothesis of the study is based on assumption that diosmin combined with standard anticoagulation can improve outcomes of femoro-popliteal DVT due to increase speed of veins recanalization, decrease of vein wall inflammation and finally decrease the incidence of PTS at 6 month and 1 year after index DVT.

02

Conditions studied

  • Deep Vein Thrombosis
  • Postthrombotic Syndrome

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Keywords

  • deep vein thrombosis
  • postthrombotic syndrome
  • anticoagulation
  • treatment
  • prevention
03

In context

Postthrombotic Syndrome Reclassified

73 studies on the registry are indexed under Postthrombotic Syndrome; 21 are open to participants now.

This study's enrollment of 90 is close to the median of 95 across 46 interventional studies indexed under Postthrombotic Syndrome.

Browse Postthrombotic Syndrome studies →

Lead sponsor

Pirogov Russian National Research Medical University is the lead sponsor of 57 studies on the registry; 15 are open to participants now.

Compared within Postthrombotic Syndrome, this study's primary condition as ClinicalTrials.gg classifies it; the registry's first condition term is Venous Thrombosis. The counts are of registry records indexed under each term, refreshed daily. How we classify →

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Age over 18 years
  • The first episode of femoro-popliteal deep vein thrombosis (DVT)
  • Verification of DVT by duplex ultrasound
  • signed

Exclusion criteria

Exclusion Criteria:

  • Suspicion of pulmonary embolism (PE)
  • Verified PE
  • Bilateral DVT
  • for rivaroxaban (in accordance with the official instructions)
  • Contraindications for diosmin (in accordance with the official instructions)
  • Active cancer
  • Verified severe thrombophilia (antiphospholipid antibodies, deficiency of proteins C, S, antithrombin 3)
  • Use of other anticoagulants for more than 7 days from the DVT verification
  • Impossibility of using compression stocking after 3 days from DVT verification
  • Performed surgical intervention on the superficial or deep veins of the lower extremities (thrombolysis, thrombectomy, vein ligation, implantation of the inferior cava filter)
  • Continuous use of other drugs that affect the hemostasis system (except for acetylsalicylic acid in a dose of not more than 100 mg).
  • Low compliance
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Contraindication

A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.

05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Single (Outcomes assessor)
Enrollment
90 participants (actual)

Study arms

  • Experimental
    Experimental: Rivaroxaban + Diosmin + Stockings

    treatment of deep vein thrombosis with anticoagulation (rivaroxaban), elastic compression stockings and additional prescription of diosmin

    Drug: Rivaroxaban · Drug: Diosmin · Other: compression stockings

  • Active comparator
    Control: Rivaroxaban + Stockings only

    standard treatment of deep vein thrombosis with anticoagulation (rivaroxaban) and elastic compression stockings

    Drug: Rivaroxaban · Other: compression stockings

Interventions

  • 15 mg b.i.d. for 3 weeks and then 20 mg q.d. up to 6 month

    Also known as: xarelto

  • 600 mg q.d. for 12 month

    Also known as: flebodia

  • Othercompression stockings

    above knee stocking for 12 month

06

What researchers measure

Primary outcomes

  1. Number of Participants With Postthrombotic Syndrome as Determined by Villalta Score

    Detection of the postthrombotic syndrome (PTS) was made according to the Villalta score (a combination of 5 subjective symptoms and 6 objective signs of chronic venous disease) ranged from 0 (no signs) to 33 scores (maximal severity). PTS defined as 5 and more scores; mild PTS as 5-9 scores; moderate PTS as 10-14 scores; severe PTS as 15 and more scores.

    Time frame: 12 months

Secondary outcomes

  1. Number of Participants With Recurrent Symptomatic or Asymptomatic DVT

    detection of any episode of recurrent DVT with or without clinical signs verified by duplex ultrasound

    Time frame: 12 months

  2. Number of Participants With Symptomatic Pulmonary Embolism

    detection of symptomatic pulmonary embolism verified with CT pulmonary angiogram

    Time frame: 12 months

  3. The Value of Venous Clinical Severity Score

    Venous Clinical Severity Score (VCSS) is a combination of subjective symptoms and objective signs of CVD aimed to assess the severity of disease and ranges from 0 (no signs and symptoms of CVD) to 30 (severe signs and symptoms of CVD)

    Time frame: 12 months

  4. The Value of Chronic Lower Limb Venous Insufficiency Questionnaire - 20 Items

    Chronic Lower Limb Venous Insufficiency Questionnaire - 20 items (CIVIQ-20) is a venous specific questionnaire to assess the disease-specific quality of life (QoL). It contains 20 items of 1-5 scores, totally, from 20 (best QoL) to100 (worst QoL) scores.

    Time frame: 12 months

  5. Number of Participants With Full Recanalization of the Popliteal Vein

    Full recanalization of popliteal vein suggests the residual venous obstruction (RVO) less than 20%. The RVO was assessed by duplex ultrasound and calculated as the vein cross-sectional diameter under the maximal compression divided on the diameter without any compression multiplied by 100%.

    Time frame: 12 months

  6. Extension of Residual Venous Obstruction by Marder Score

    Residual venous obstruction (RVO) defined as a thrombotic masses occupying 20% and more of the vein cross-sectional diameter was measured by duplex ultrasound and calculated as the vein cross-sectional diameter under the maximal compression divided on the diameter without compression and multiplied by 100%. The extension of RVO was assessed by Marder score, the sum of all affected venous segments, evaluated by different scores (see Appendix of the Protocol), that ranged from 0 (no RVO) to 34 (RVO in all possible venous segments in one limb).

    Time frame: 12 months

  7. Adverse Events

    any adverse events detected or suspected

    Time frame: 12 months

  8. Major Bleeding

    according to the International Society of Thrombosis and Hemostasis (ISTH) definition, major bleeding defined as fatal bleeding, and/or symptomatic bleeding in a critical area or organ, such as intracranial, intraspinal, intraocular, retroperitoneal, intraarticular or pericardial, or intramuscular with compartment syndrome, and/or bleeding causing a fall in hemoglobin level of 20 g/L or 1.24 mmol/L or more, or leading to transfusion of two or more units of whole blood or red cells

    Time frame: 12 months

  9. Clinically Relevant Non-major Bleeding

    any non-major bleeding requiring anticoagulant withdrawal, and/or performing haemostatic measures, and/or hospitalization, and/or an unscheduled medical appointment

    Time frame: 12 months

  10. Minor Bleeding

    any non-major or non-clinically relevant bleeding does not require the suspension of therapy and changes in the patient's lifestyle

    Time frame: 12 months

07

Results

Posted Jan 27, 2020
Limitations and caveats
Unsuspected high frequency of PTS in the Control group (standard treatment with rivaroxaban and compression stockings) led to early termination of enrollment (75% of planned sample size).

Participant flow

Participant flow — Overall Study
MilestoneExperimental: Rivaroxaban + Diosmin + StockingsControl: Rivaroxaban + Stockings Only
Started4545
Completed4545
Not completed00

Outcome measures

PrimaryNumber of Participants With Postthrombotic Syndrome as Determined by Villalta Score

Detection of the postthrombotic syndrome (PTS) was made according to the Villalta score (a combination of 5 subjective symptoms and 6 objective signs of chronic venous disease) ranged from 0 (no signs) to 33 scores (maximal severity). PTS defined as 5 and more scores; mild PTS as 5-9 scores; moderate PTS as 10-14 scores; severe PTS as 15 and more scores.

Time frame:
12 months
Reported as:
Count of participants · Participants
Number of Participants With Postthrombotic Syndrome as Determined by Villalta Score
ParticipantsExperimental: Rivaroxaban + Diosmin + StockingsControl: Rivaroxaban + Stockings Only
Number of Participants With Postthrombotic Syndrome as Determined by Villalta Score322
Statistical analysis
  • Experimental: Rivaroxaban + Diosmin + Stockings vs Control: Rivaroxaban + Stockings Only · Fisher Exact · p = <0.0001
SecondaryNumber of Participants With Recurrent Symptomatic or Asymptomatic DVT

detection of any episode of recurrent DVT with or without clinical signs verified by duplex ultrasound

Time frame:
12 months
Reported as:
Count of participants · Participants
Number of Participants With Recurrent Symptomatic or Asymptomatic DVT
ParticipantsExperimental: Rivaroxaban + Diosmin + StockingsControl: Rivaroxaban + Stockings Only
Number of Participants With Recurrent Symptomatic or Asymptomatic DVT16
Statistical analysis
  • Experimental: Rivaroxaban + Diosmin + Stockings vs Control: Rivaroxaban + Stockings Only · Log Rank · p = 0.049
SecondaryNumber of Participants With Symptomatic Pulmonary Embolism

detection of symptomatic pulmonary embolism verified with CT pulmonary angiogram

Time frame:
12 months
Reported as:
Count of participants · Participants
Number of Participants With Symptomatic Pulmonary Embolism
ParticipantsExperimental: Rivaroxaban + Diosmin + StockingsControl: Rivaroxaban + Stockings Only
Number of Participants With Symptomatic Pulmonary Embolism00
SecondaryThe Value of Venous Clinical Severity Score

Venous Clinical Severity Score (VCSS) is a combination of subjective symptoms and objective signs of CVD aimed to assess the severity of disease and ranges from 0 (no signs and symptoms of CVD) to 30 (severe signs and symptoms of CVD)

Time frame:
12 months
Reported as:
Mean · VCSS score
The Value of Venous Clinical Severity Score
VCSS scoreExperimental: Rivaroxaban + Diosmin + StockingsControl: Rivaroxaban + Stockings Only
The Value of Venous Clinical Severity Score1.2 ± 1.14.4 ± 2.1
Statistical analysis
  • Experimental: Rivaroxaban + Diosmin + Stockings vs Control: Rivaroxaban + Stockings Only · Fisher Exact · p = <0.0001
SecondaryThe Value of Chronic Lower Limb Venous Insufficiency Questionnaire - 20 Items

Chronic Lower Limb Venous Insufficiency Questionnaire - 20 items (CIVIQ-20) is a venous specific questionnaire to assess the disease-specific quality of life (QoL). It contains 20 items of 1-5 scores, totally, from 20 (best QoL) to100 (worst QoL) scores.

Time frame:
12 months
Reported as:
Mean · CIVIQ-20 scores
The Value of Chronic Lower Limb Venous Insufficiency Questionnaire - 20 Items
CIVIQ-20 scoresExperimental: Rivaroxaban + Diosmin + StockingsControl: Rivaroxaban + Stockings Only
The Value of Chronic Lower Limb Venous Insufficiency Questionnaire - 20 Items22.1 ± 3.328.8 ± 7.6
Statistical analysis
  • Experimental: Rivaroxaban + Diosmin + Stockings vs Control: Rivaroxaban + Stockings Only · Fisher Exact · p = <0.0001
SecondaryNumber of Participants With Full Recanalization of the Popliteal Vein

Full recanalization of popliteal vein suggests the residual venous obstruction (RVO) less than 20%. The RVO was assessed by duplex ultrasound and calculated as the vein cross-sectional diameter under the maximal compression divided on the diameter without any compression multiplied by 100%.

Time frame:
12 months
Reported as:
Count of participants · Participants
Number of Participants With Full Recanalization of the Popliteal Vein
ParticipantsExperimental: Rivaroxaban + Diosmin + StockingsControl: Rivaroxaban + Stockings Only
Number of Participants With Full Recanalization of the Popliteal Vein4228
SecondaryExtension of Residual Venous Obstruction by Marder Score

Residual venous obstruction (RVO) defined as a thrombotic masses occupying 20% and more of the vein cross-sectional diameter was measured by duplex ultrasound and calculated as the vein cross-sectional diameter under the maximal compression divided on the diameter without compression and multiplied by 100%. The extension of RVO was assessed by Marder score, the sum of all affected venous segments, evaluated by different scores (see Appendix of the Protocol), that ranged from 0 (no RVO) to 34 (RVO in all possible venous segments in one limb).

Time frame:
12 months
Reported as:
Mean · Marder score
Extension of Residual Venous Obstruction by Marder Score
Marder scoreExperimental: Rivaroxaban + Diosmin + StockingsControl: Rivaroxaban + Stockings Only
Extension of Residual Venous Obstruction by Marder Score0.3 ± 1.01.9 ± 2.4
Statistical analysis
  • Experimental: Rivaroxaban + Diosmin + Stockings vs Control: Rivaroxaban + Stockings Only · Fisher Exact · p = 0.001
SecondaryAdverse Events

any adverse events detected or suspected

Time frame:
12 months
Reported as:
Count of participants · Participants
Adverse Events
ParticipantsExperimental: Rivaroxaban + Diosmin + StockingsControl: Rivaroxaban + Stockings Only
Adverse Events54
Statistical analysis
  • Experimental: Rivaroxaban + Diosmin + Stockings vs Control: Rivaroxaban + Stockings Only · Fisher Exact · p = 1.000
SecondaryMajor Bleeding

according to the International Society of Thrombosis and Hemostasis (ISTH) definition, major bleeding defined as fatal bleeding, and/or symptomatic bleeding in a critical area or organ, such as intracranial, intraspinal, intraocular, retroperitoneal, intraarticular or pericardial, or intramuscular with compartment syndrome, and/or bleeding causing a fall in hemoglobin level of 20 g/L or 1.24 mmol/L or more, or leading to transfusion of two or more units of whole blood or red cells

Time frame:
12 months
Reported as:
Count of participants · Participants
Major Bleeding
ParticipantsExperimental: Rivaroxaban + Diosmin + StockingsControl: Rivaroxaban + Stockings Only
Major Bleeding00
SecondaryClinically Relevant Non-major Bleeding

any non-major bleeding requiring anticoagulant withdrawal, and/or performing haemostatic measures, and/or hospitalization, and/or an unscheduled medical appointment

Time frame:
12 months
Reported as:
Count of participants · Participants
Clinically Relevant Non-major Bleeding
ParticipantsExperimental: Rivaroxaban + Diosmin + StockingsControl: Rivaroxaban + Stockings Only
Clinically Relevant Non-major Bleeding12
SecondaryMinor Bleeding

any non-major or non-clinically relevant bleeding does not require the suspension of therapy and changes in the patient's lifestyle

Time frame:
12 months
Reported as:
Count of participants · Participants
Minor Bleeding
ParticipantsExperimental: Rivaroxaban + Diosmin + StockingsControl: Rivaroxaban + Stockings Only
Minor Bleeding22

Adverse events

Collected over 12 months. Non-serious events are listed at a 0% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Study Group0/45 (0%)0/45 (0%)5/45 (11.1%)
Control Group0/45 (0%)0/45 (0%)4/45 (8.9%)
Most frequent other events
Most frequent other events
EventStudy GroupControl Group
DispesiaGastrointestinal disorders2/450/45
Clinically relevant non-major bleedingBlood and lymphatic system disorders1/452/45
Minor bleedingBlood and lymphatic system disorders2/452/45

Baseline characteristics

Age, Continuous
Age, Continuous(years)Experimental: Rivaroxaban + Diosmin + StockingControl: Rivaroxaban + Stockings OnlyTotal
Mean57.4 ± 13.860.2 ± 13.158.8 ± 13.4
Sex: Female, Male
Sex: Female, Male(Participants)Experimental: Rivaroxaban + Diosmin + StockingControl: Rivaroxaban + Stockings OnlyTotal
Female171734
Male282856
Race and Ethnicity Not Collected
Race and Ethnicity Not Collected(Participants)Experimental: Rivaroxaban + Diosmin + StockingControl: Rivaroxaban + Stockings OnlyTotal
Count of participants——0
Region of Enrollment
Region of Enrollment(participants)Experimental: Rivaroxaban + Diosmin + StockingControl: Rivaroxaban + Stockings OnlyTotal
Russia454590
Time to randomization
Time to randomization(days)Experimental: Rivaroxaban + Diosmin + StockingControl: Rivaroxaban + Stockings OnlyTotal
Mean3.4 ± 1.23.5 ± 1.63.5 ± 1.4
Unprovoked DVT
Unprovoked DVT(Participants)Experimental: Rivaroxaban + Diosmin + StockingControl: Rivaroxaban + Stockings OnlyTotal
Count of participants293362
Preexisting chronic venous disease
Preexisting chronic venous disease(Participants)Experimental: Rivaroxaban + Diosmin + StockingControl: Rivaroxaban + Stockings OnlyTotal
Count of participants233255
Thrombus burden
Thrombus burden(Marder score)Experimental: Rivaroxaban + Diosmin + StockingControl: Rivaroxaban + Stockings OnlyTotal
Mean15.2 ± 4.711.6 ± 4.113.4 ± 4.7
08

Study locations

1 site
  • Clinical Hospital no.1 of the President's Administration of Russian Federation
    Moscow, 121352, Russian Federation
09

References and documents

Publications

  • Lobastov K, Sautina E, Alencheva E, Bargandzhiya A, Schastlivtsev I, Barinov V, Laberko L, Rodoman G, Boyarintsev V. Intermittent Pneumatic Compression in Addition to Standard Prophylaxis of Postoperative Venous Thromboembolism in Extremely High-risk Patients (IPC SUPER): A Randomized Controlled Trial. Ann Surg. 2021 Jul 1;274(1):63-69. doi: 10.1097/SLA.0000000000004556. PubMed 33201130 ↗

Study documents

PDFs hosted by the registry, ClinicalTrials.gov.

Individual participant data

Plan to share: No

10

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reached

Ran from Dec 2017 to primary completion in Jul 2019, 19 months.

Results were first posted in Jan 2020, 5 months after primary completion.

How these figures are worked out, and which studies are left out of them.

Registered
Jan 18, 2018
First posted
Jan 29, 2018
StartActual
Dec 20, 2017
Primary completionActual
Jul 31, 2019
CompletionActual
Jul 31, 2019
Results first posted
Jan 27, 2020
Last update
Feb 4, 2021
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
No changes since tracking began. The registry record was last updated on Feb 4, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
11

Registry details

Key details

Study ID
NCT03413618
Lead sponsor
Pirogov Russian National Research Medical University
Responsible party
Sponsor
First posted
Jan 29, 2018
Start date
Dec 20, 2017
Primary completion
Jul 31, 2019
Completion
Jul 31, 2019
Results posted
Jan 27, 2020
Last update
Feb 4, 2021

Study contacts

Ilya Schastlivtsev, PhD
principal investigator · Pirogov Russian National Research Medical University

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Studies of the drug tested here: Diosmin

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