- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03672006
t-PA Prophylaxis to Prevent Catheter-associated Thrombosis and Infection (TOPCAT)
Tissue Plasminogen Activator Dwells to Reduce Catheter-associated Thrombosis and Infection
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
This pilot study Children's Hospital of Wisconsin will be a prospective, blinded, randomized controlled trial enrolling 20 patients in the pediatric intensive care unit (PICU) with a newly placed central venous catheter (CVC) to receive t-PA or heparin (current standard of care and defined as placebo for this study) to dwell for a minimum of 30 minutes every three days until catheter removal or discharge from the PICU. Primary outcomes would be central line associated blood stream infection (CLABSI) or venous thromboembolism (VTE). Secondary outcomes would be episodes of CVC dysfunction, off study use of t-PA, and bleeding.
Any patient admitted to the PICU and meeting the inclusion criteria will be approached for consent within 72 hours CVC placement. Randomization and administration of study drug/placebo treatment will be initiated within 24 hours of enrollment.
After randomization, study drug/heparin will be infused in the CVC for a dwell duration of 30 minutes-4 hours and then withdrawn (lock therapy) every 3 days until discharge from the PICU, CVC removal or a maximum of 10 doses received. Additional lumens will be treated on subsequent days. Any lumen requiring continuous infusion of vaso-active medication will not receive dwell therapy, evaluated on a day-to-day basis. Timing of instillation of study dwell medication will be adjusted so as not to interfere with medications for patient care.
This single center, pilot study will enroll 20 subjects.
Procedures to be completed for this study are as follows:
After informed consent/assent, the patient will be randomized and assigned to either the treatment arm (t-PA lock) or placebo arm (heparin lock). Randomization will be stratified by age (<5 or ≥5 years old). To maintain the blind, randomization will be done in the investigational pharmacy prior to the dispensing of the study drug/heparin.
Study Treatment and Dosing In subjects randomized to the t-PA, dosing and administration will comply with the Children's Hospital and Health System (CHHS) Policy and Procedure Protocol t-PA Administration for Central Venous Access Devices (CVAD); subjects randomized to the standard of care heparin group will receive an equivalent volume for weight of heparin 10U/ml. The CVC should be flushed with normal saline prior to infusion of study drug/placebo. After dwelling time of 30 minutes-4 hours, study drug/placebo should be withdrawn, check for blood return in CVC and flush line with normal saline as per policy. Each lumen of multi-lumen CVC should be treated every 3 days until patient discharge from PICU, removal of CVC, or a maximum of 10 doses of study drug/placebo are received.
Patient weight Volume Study drug/Placebo 0-10kg 0.5ml 10-20kg 1 ml >20kg 2 ml
These doses by body weight have been approved by the FDA for and CHHS Patient Care Protocol (tPA Administration for Central Venous Access Devices (CVADs) for use in children with CVC and are not associated with significant bleeding. If a 2mg (ml) dose of t-PA is administered by bolus injection directly into the systemic circulation, rather than as a dwell within the CVC, the drug concentration would return to endogenous levels with 30 minutes.
Ultrasound imaging At the end of the study period, a noninvasive ultrasound with doppler will be performed to assess for asymptomatic thrombosis in the blood vessel of the CVC location.
Study Type
Enrollment (Actual)
Phase
- Phase 2
Contacts and Locations
Study Locations
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Wisconsin
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Milwaukee, Wisconsin, United States, 53201
- Children's Hospital of Wisconsin
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Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Age 0 - ≤ 18 years old
- PICU admission
- CVC placed within 72 hours of enrollment (tunneled such as peripherally inserted central catheter (PICC), Broviac or Hickman, or untunneled) and in place during hospitalization
Exclusion Criteria:
- Pregnancy
- Non-English-speaking subjects and/or parent/guardian
- Platelet count < 20,000
- Active CVC infection-defined as positive blood culture from the in -situ CVC at time of enrollment
- Current radiographically confirmed VTE
- Currently receiving treatment doses of anticoagulation (heparin infusion >15U/kg/hr, enoxaparin injections >=2mg/kg/day or >=60mg/day)
- CVC diameter <1.9 Fr
- Current or previous diagnosis of Heparin Induced Thrombocytopenia or allergy to heparin or t-PA
- Med-a-port catheters
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Prevention
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: Quadruple
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Experimental: alteplase
patients will receive 30 min-4 hours dwells of alteplase (recombinant t-PA) (2mg/2ml, up to 2mg per dose) to central venous catheter every 3 days (maximum 10 doses)
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Medication administered to dwell in central venous catheter
Other Names:
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Active Comparator: Heparin
patients will receive 30 min-4 hours heparin (10U/ml, up to 2 ml per dose) dwells to central venous catheter every 3 days (maximum 10 doses)
|
Medication administered to dwell in central venous catheter
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Catheter-associated Venous Thrombosis
Time Frame: 30 days or ICU discharge
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Catheter-associated Venous Thrombosis upon ICU discharge or 30 days
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30 days or ICU discharge
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Catheter-associated Bloodstream Infection
Time Frame: 30 days or ICU discharge
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CLABSI
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30 days or ICU discharge
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Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Episodes of CVC Dysfunction
Time Frame: 30 days or ICU discharge
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Episodes of CVC dysfunction
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30 days or ICU discharge
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Off Study Use of t-PA
Time Frame: 30 days or ICU discharge
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off study use
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30 days or ICU discharge
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Clinical Bleeding
Time Frame: 30 days or ICU discharge
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clinically significant bleeding
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30 days or ICU discharge
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start (Actual)
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Actual)
Study Record Updates
Last Update Posted (Actual)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Pathologic Processes
- Cardiovascular Diseases
- Vascular Diseases
- Systemic Inflammatory Response Syndrome
- Inflammation
- Disease Attributes
- Embolism and Thrombosis
- Venous Thrombosis
- Sepsis
- Infections
- Communicable Diseases
- Thrombosis
- Upper Extremity Deep Vein Thrombosis
- Molecular Mechanisms of Pharmacological Action
- Fibrinolytic Agents
- Fibrin Modulating Agents
- Anticoagulants
- Heparin
- Tissue Plasminogen Activator
Other Study ID Numbers
- MCWisconsin
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
Drug and device information, study documents
Studies a U.S. FDA-regulated drug product
Studies a U.S. FDA-regulated device product
product manufactured in and exported from the U.S.
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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