ClinicalTrials.gg
Status unknownNCT04441957MOCASSUpdated Nov 16, 2021

MechanO-Chemical Ablation Versus CompreSSion

An observational study in Varicose Veins and Surgery, sponsored by Belarusian State Medical University. Status unknown at 1 site in Belarus. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2021-11-16.

Primary conditionVaricose UlcerRegistry: Varicose VeinsReclassifiedWhy we changed it
Registry
Varicose Veins — the first condition term the registry derived for this study.
ClinicalTrials.gg
Varicose Ulcer
Why
  1. The study's title name Varicose Ulcer, a narrower term within Varicose Veins.
Confidence
High: the new condition is named in the study's own title. Of 46 hand-checked studies reclassified this way, 72% were exactly right and 89% in the right disease family; the registry's first term was right for 4% (measured 2026-10-21). How we classify →
Wrong?
Tell us the study's main condition →

Sponsored by Belarusian State Medical University · Observational

The sponsor has not verified this record recently (last verified Nov 2021), so the status shown — last known as Recruiting — may be out of date.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
50
Ages
18 Years to 80 Years
Sex
All
01

Study summary

This study will be looking at the effect of Endovenous Mechano-Chemical Ablation (MOCA) in addition to multilayer elastic compression bandaging vs multilayer elastic compression bandaging only in patients with incompetent great saphenous vein (GSV) and venous ulcers (VU's).

Read the detailed description

The most severe form of chronic venous disease is venous ulceration with an overall prevalence of about 1% in the adult population. Venous ulcers significantly impair quality of life, and their treatment places a heavy financial burden upon healthcare systems.

To get the ulcer to heal, the current best treatment is to wear a compression bandage with multiple layers, with which about 60% of these ulcers will heal within 6 months.

There is evidence that treatment of the varicose veins by sahenous veins stripping will prevent the ulcer recurrence.

Recent studies have suggested that novel proceduress of superficial truncal reflux elimination, such as foam sclerotherapy or treating the saphenous veins with termal (laser or radiofrequency) ablation to seal it effectively, may help the ulcers to heal more quickly and increase recurrence-free rate. These techniques can be carried out in the outpatient setting and are much better tolerated by patients in comparison to surgery.

At the same time, no studies which compared compression plus endovenous mechanochemical ablation (MOCA) vs. compression alone in chronic venous ulcers have been conducted to date.

The aim of this study is to see whether treatment of varicose veins using MOCA helps with healing.

02

Conditions studied

  • Varicose Veins
  • Surgery

Browse trials for

Keywords

  • VV
  • MOCA
  • GSV
  • Venous Ulcers
03

In context

Varicose Ulcer Reclassified

369 studies on the registry are indexed under Varicose Ulcer; 77 are open to participants now.

This study's planned enrollment of 50 is below the median of 131 across 47 observational studies indexed under Varicose Ulcer.

Browse Varicose Ulcer studies →

Lead sponsor

Belarusian State Medical University is the lead sponsor of 8 studies on the registry; 1 is open to participants now.

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

04

Who can participate

Ages eligible
18 Years to 80 Years
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Probability sample

Study population

Patients with GSV incompetence and C6 were included in in the prospective consecutive case study if they satisfied the selection criteria.

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

  1. Patient age > 18 years.
  2. Current leg ulceration of greater than 6 weeks.
  3. Great saphenous vein (GSV) incompetence with reflux at least down to the knee level.
  4. Primary symptomatic varicose veins, Clinical Etiological Anatomical Pathophysiological (CEAP) classification, clinical class C6.
  5. Able to give to participate in the study after reading the patient information documentation.
  6. Ankle Brachial Pressure Index (ABPI) ≥ 0.8.

Exclusion criteria

Exclusion Criteria:

  1. Postoperative varicose veins disease recurrence.
  2. Patients who are unable to tolerate any multilayer compression bandaging / stockings will be excluded.
  3. Deep venous thrombosis, thrombophilia associated with a high risk of deep venous thrombosis or postthrombotic syndrome.
  4. History of pulmonary embolism or stroke.
  5. Current anticoagulation therapy (within 7 days of enrollment).
  6. Pregnant or lactating women.
Terms in these criteria, in plain language(1)

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.

05

Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
50 participants (estimated)
Patient registry
No

Groups and cohorts

  • Group A, MOCA-group

    Procedure/Surgery: MOCA Mechano-Chemical Ablation plus Elastic Compression

    Device: Endovenous Mechano- Chemical Ablation

  • Group B, Elastic Compression only group

    Treatment: Elastic Compression only

Interventions

  • DeviceEndovenous Mechano- Chemical Ablation

    The Flebogrif™ catheter (Balton® Sp. z o.o., Warsaw, Poland) represents endoluminal Non Thermal Non Tumescent devices designed to cause occlusion (fibrosis) of the target vein through the combined mechanical and chemical damage to its endothelial lining with retractable cutters and foamed sclerosant.

    Also known as: MOCA

06

What researchers measure

Primary outcomes

  1. Number of Participants with varicose Veins from absent (score 0) to severe (score 3).

    None (0), Few, scattered (1), Confined to calf or thigh (2) Involve calf and thigh (3)

    Time frame: 6-12 months

  2. Number of Participants with skin Pigmentation from absent (score 0) to severe (score 3).

    None (0), Limited to perimalleolar area (1), Diffuse over lower third of calf (2), Wider distribution (above lower third of calf) (3)

    Time frame: 6-12 months

  3. Number of Participants with induration from absent (score 0) to severe (score 3).

    None (0), Limited to perimalleolar area (1), Involving lower third of calf (2), Involving more than lower third of calf (3)

    Time frame: 6-12 months

  4. Number of Participants with active ulcers from absent (score 0) to severe (score 3).

    None (0), 1 (1), 2 (2), more than 2 (3)

    Time frame: 6-12 months

  5. Number of Participants with active ulcer diameter from absent (score 0) to severe (score 3).

    None (0), Diameter less than 2 cm (1), Diameter 2-6 cm (2), Diameter more than 6 cm (3)

    Time frame: 6-12 months

Secondary outcomes

  1. Number of Participants with ulcer recurrence-free rate (no - score 0, yes - score 1)

    None (0), Less than 3 months (1), More than 3 months but less than 1 year (2) More than 1year (3)

    Time frame: 3-24 months

07

Study locations

1 of 1 sites recruiting
  • Educational Institution "Belarusian State Medical University"
    Minsk, Dzerzhinski Ave., 83, 220116, Belarus
    Recruiting
08

References and documents

Publications

  • Kanchanabat B, Stapanavatr W, Kanchanasuttiruk P. Total superficial vein reflux eradication in the treatment of venous ulcer. World J Surg. 2015 May;39(5):1301-5. doi: 10.1007/s00268-014-2935-y. PubMed 25680797 ↗
  • Barwell JR, Davies CE, Deacon J, Harvey K, Minor J, Sassano A, Taylor M, Usher J, Wakely C, Earnshaw JJ, Heather BP, Mitchell DC, Whyman MR, Poskitt KR. Comparison of surgery and compression with compression alone in chronic venous ulceration (ESCHAR study): randomised controlled trial. Lancet. 2004 Jun 5;363(9424):1854-9. doi: 10.1016/S0140-6736(04)16353-8. PubMed 15183623 ↗
  • Gohel MS, Heatley F, Liu X, Bradbury A, Bulbulia R, Cullum N, Epstein DM, Nyamekye I, Poskitt KR, Renton S, Warwick J, Davies AH; EVRA Trial Investigators. A Randomized Trial of Early Endovenous Ablation in Venous Ulceration. N Engl J Med. 2018 May 31;378(22):2105-2114. doi: 10.1056/NEJMoa1801214. Epub 2018 Apr 24. PubMed 29688123 ↗
  • Sullivan LP, Quach G, Chapman T. Retrograde mechanico-chemical endovenous ablation of infrageniculate great saphenous vein for persistent venous stasis ulcers. Phlebology. 2014 Dec;29(10):654-7. doi: 10.1177/0268355513501301. Epub 2013 Aug 22. PubMed 23969489 ↗
  • Elias S, Raines JK. Mechanochemical tumescentless endovenous ablation: final results of the initial clinical trial. Phlebology. 2012 Mar;27(2):67-72. doi: 10.1258/phleb.2011.010100. Epub 2011 Jul 29. PubMed 21803800 ↗

Individual participant data

Plan to share: Yes — To compare clinical efficacy of Endovenous Mechano-Chemical Ablation (MOCA) in addition to multilayer elastic compression bandaging and multilayer elastic compression bandaging only in patients with incompetent great saphenous vein (GSV) and venous ulcers (VU's).

Supporting information: Study protocol, Statistical analysis plan, Informed consent form, Clinical study report, Analytic code

Time frame: 12.2021

Access criteria: To compare clinical efficacy of Endovenous Mechano-Chemical Ablation (MOCA) in addition to multilayer elastic compression bandaging and multilayer elastic compression bandaging only in patients with incompetent great saphenous vein (GSV) and venous ulcers (VU's).

09

Timeline

Tracking since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Ran from Jan 2018 to primary completion in Jun 2020, 29 months.

Of 27 observational studies under Varicose Ulcer, half reached primary completion within 31 months of starting (the median), counting those still running; a quarter within 17 and three quarters within 141. This study's 29 months is close to that.

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

Registered
Jun 19, 2020
First posted
Jun 22, 2020
StartActual
Jan 1, 2018
Primary completionActual
Jun 15, 2020
CompletionEst.
Dec 31, 2021
Last update
Nov 16, 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 Nov 16, 2021, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04441957
Lead sponsor
Belarusian State Medical University
Responsible party
Vladimir Khryshchanovich (Professor, Belarusian State Medical University) — Principal investigator
First posted
Jun 22, 2020
Start date
Jan 1, 2018
Primary completion
Jun 15, 2020
Completion
Dec 31, 2021 (estimated)
Last update
Nov 16, 2021

Study contacts

Vladimir MD Khryshchanovich, Prof
Contact
vladimirkh77@mail.ru
+375296245578
Robert MD Proczka
Contact
ramjup@icloud.com
+37548601332752
Vladimir MD Khryshchanovich, Prof
study chair · Educational Institution "Belarusian State Medical University"

Oversight

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

Not currently enrolling

This study is status unknown, as verified in Nov 2021. You cannot join it, but the record below documents what was studied.

Follow this study

Get an email when the registry record changes — status, dates, results — or when someone posts here.

Sign in to follow

Discussion

Questions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.

Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.

Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.

Start the discussion