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Perivenous Dexamethasone Therapy: Examining Reduction of Inflammation After Thrombus Removal to Yield Benefit in Acute Femoropopliteal DVT (DEXTERITY-AFP)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT04862468
Recruitment Status : Recruiting
First Posted : April 28, 2021
Last Update Posted : November 9, 2021
Information provided by (Responsible Party):
Mercator MedSystems, Inc.

Brief Summary:
This is a study of a medical procedure that utilizes a commercially available catheter (the Bullfrog® Micro-Infusion Device) to locally deliver a commercially available anti-inflammatory drug (dexamethasone sodium phosphate injection) around the deep veins after DVT recanalization, where DVT symptoms were present for up to 14 days prior to recanalization. The goal of the study is to see if local anti-inflammation helps prevent re-thrombosis of the blood vessel and improvement in symptoms for up to 24 months after the initial DVT recanalization procedure.

Condition or disease Intervention/treatment Phase
Thrombosis, Deep Vein Iliofemoral; Thrombosis Combination Product: Perivascular dexamethasone Combination Product: Perivascular sham Phase 2

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 80 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: Perivenous Dexamethasone Therapy: Examining Reduction of Inflammation After Thrombus Removal to Yield Benefit in Acute Femoropopliteal DVT (DEXTERITY-AFP)
Actual Study Start Date : October 29, 2021
Estimated Primary Completion Date : May 1, 2023
Estimated Study Completion Date : December 31, 2024

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Blood Clots

Arm Intervention/treatment
Experimental: Treatment Combination Product: Perivascular dexamethasone
Dexamethasone delivery around target vein segment(s)

Sham Comparator: Control Combination Product: Perivascular sham
Saline delivery around target vein segment(s)

Primary Outcome Measures :
  1. Rate of clinically relevant primary patency [ Time Frame: 6 months ]
    Rate of freedom from loss of patency (defined as 100% occlusion of unstented vein or 50% stenosis of stented vein measured by duplex ultrasound or angiogram) with associated symptoms

  2. Rate of freedom from major adverse event (MAE) [ Time Frame: 30 days ]
    Rate of freedom from composite of all-cause death, clinically significant pulmonary embolism, major bleeding, target vessel thrombosis, infection of treatment or insertion site, or AV fistula of treatment site

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 89 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Provision of signed and dated informed consent form prior to receiving any non-standard of care, protocol-specific procedures.
  2. Stated willingness to comply with all study procedures including completion of questionnaires and follow-up visits and availability for the duration of the study.
  3. Male or female, aged 18 to 89 years.
  4. For females of reproductive potential: negative pregnancy test ≤7 days before the procedure, use of highly effective contraception for at least 1 month prior to screening, and agreement to use such a method during study participation.
  5. Negative COVID-19 test result within 5 days prior to procedure or evidence of COVID-19 vaccine or booster within past 12 months.
  6. Onset of acute DVT symptoms of 14 days or less in the study limb.
  7. Ability to take oral medication and be willing to adhere to the prescribed anti-coagulant regimen.
  8. Prescription for at least 28 days low molecular weight heparin followed by therapeutic anticoagulant of investigator's choice for 12-month minimum as part of post-interventional medication regimen.
  9. Minimum of 30 days of prescribed antiplatelet agent (aspirin or P2Y12 inhibitor).
  10. DVT located in the major femoropopliteal veins, with possible extension downstream into the iliac veins.
  11. Successful recanalization of the target vein with removal of acute thrombus.

Exclusion Criteria:

  1. Current enrollment in another non-registry clinical study of systemic drug therapy or another device study that has not completed its primary endpoint, including prior enrollment in this study. Concurrent enrollment in registry studies of approved devices or drugs are acceptable.
  2. Lack of capability of understanding the nature, significance and implications of the clinical trial.
  3. Body Mass Index > 40 kg/m2.
  4. Non-ambulatory status prior to DVT occurrence.
  5. In the study leg: established PTS, known symptomatic venous insufficiency or previous symptomatic DVT within the last 2 years.
  6. In the contralateral (non-study) leg: symptomatic DVT that, in the opinion of the operating physician, will require surgery in the following 30 days.
  7. Limb-threatening circulatory compromise with ankle-brachial index <0.4, absolute ankle pressure <50 mmHg or absolute toe pressure <30 mmHg.
  8. Pulmonary embolism (PE) defined as either massive (Systolic blood pressure < 90 mmHg and/or patient on IV vasoactive medication to support blood pressure), or intermediate high-risk PE, as defined by the European Society Guideline on management of PE. Low-risk PE and/or intermediate low-risk PE can be enrolled.
  9. Inability to tolerate contemporary venous intervention procedure due to severe dyspnea or acute systemic illness.
  10. Allergy, hypersensitivity, or thrombocytopenia from heparin, Recombinant tissue plasminogen activator (rtPA), dexamethasone sodium phosphate or iodinated contrast, except for mild-moderate contrast allergies for which steroid pre-medication can be used.
  11. History of, or active heparin-induced thrombocytopenia (HIT).
  12. Hemoglobin < 9.0 mg/dl, INR > 1.6 before starting anticoagulation, or platelets < 100,000/ml. Moderate renal impairment in diabetic patients (estimated glomerular filtration rate < 60 ml/min) or severe renal impairment in non-diabetic patients (estimated glomerular filtration rate < 30 ml/min).
  13. Active bleeding, recent (< 3 mo) GI bleeding, severe liver dysfunction, bleeding diathesis.
  14. Recent (< 3 mo) internal eye surgery or hemorrhagic retinopathy; recent (< 10 days) major surgery, cataract surgery, trauma, cardiopulmonary resuscitation, or other invasive procedure; or obstetrical delivery <72 hours prior to procedure.
  15. History of hemorrhagic stroke or intracranial/intraspinal bleed, tumor, vascular malformation, aneurysm.
  16. Active cancer with a life expectancy of <2 years.
  17. Severe hypertension on repeated readings (systolic blood pressure > 180 mmHg or diastolic blood pressure > 105 mmHg). This can be treated, and blood pressure must be stable before venous access is obtained (systolic blood pressure <140 mmHg).
  18. Pregnant or breastfeeding.
  19. Life expectancy < 2 years.
  20. Thrombus of the inferior vena cava (IVC) extending at least one centimeter above the common iliac confluence.
  21. Inability to obtain venous access.
  22. Inability to recanalize the target vein segment with less than 30% residual obstruction due to thrombus.
  23. History of ipsilateral venous stent.
  24. DVT length intended for drug treatment exceeds 50 cm.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT04862468

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Contact: Kirk Seward, PhD 510-614-4550

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United States, Virginia
Sentara Norfolk General Hospital Recruiting
Norfolk, Virginia, United States, 23452
Sponsors and Collaborators
Mercator MedSystems, Inc.
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Responsible Party: Mercator MedSystems, Inc. Identifier: NCT04862468    
Other Study ID Numbers: CIP0217
First Posted: April 28, 2021    Key Record Dates
Last Update Posted: November 9, 2021
Last Verified: November 2021

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: Yes
Product Manufactured in and Exported from the U.S.: Yes
Additional relevant MeSH terms:
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Venous Thrombosis
Pathologic Processes
Embolism and Thrombosis
Vascular Diseases
Cardiovascular Diseases
Anti-Inflammatory Agents
Autonomic Agents
Peripheral Nervous System Agents
Physiological Effects of Drugs
Gastrointestinal Agents
Hormones, Hormone Substitutes, and Hormone Antagonists
Antineoplastic Agents, Hormonal
Antineoplastic Agents