- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT02970032
Evaluation of Anti-Xa Levels in Surgery Patients Receiving Fixed Dose Heparin
July 9, 2019 updated by: Corinne Bertolaccini, University of Utah
The purpose of this study is to determine if fixed dose heparin infusions at a rate of 500 units/hour are sufficient to maintain a target anti-Xa of 0.1-0.35
IU/mL for venous thromboembolism (VTE) prophylaxis in patients undergoing microvascular surgery.
Additionally, a pilot protocol has been developed to titrate these heparin infusions to ensure patients have sufficient VTE prophylaxis.
All patients will be enrolled in the observational arm of the study and receive anti-Xa level monitoring.
Patients with out-of-range anti-Xa levels will cross over to the interventional arm of the study and receive real time heparin infusion dose adjustments per the pilot protocol.
The primary outcome measured will be the percentage of patients with anti-Xa levels in the target range of 0.1-0.35
IU/mL while on a heparin infusion at 500 units/hour.
Study Overview
Status
Completed
Intervention / Treatment
Study Type
Interventional
Enrollment (Actual)
20
Phase
- Early Phase 1
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
-
Utah
-
Salt Lake City, Utah, United States, 84132
- Univeristy of Utah Hospital
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
18 years and older (ADULT, OLDER_ADULT)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Description
Inclusion Criteria:
- Patients undergoing surgical procedures
- Initiation of a heparin infusion at a rate of 500 units/hour intraoperatively or postoperatively
Exclusion Criteria:
- Age <18 years old
- Pregnant
- Incarcerated
- Mentally disabled
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Primary Purpose: PREVENTION
- Allocation: NON_RANDOMIZED
- Interventional Model: CROSSOVER
- Masking: NONE
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
ACTIVE_COMPARATOR: Standard heparin dose
The investigators will identify surgical patients placed on fixed dose heparin infusions at their attending surgeon's discretion-the proposed research will not dictate the initiation of the heparin drip intraoperatively.
However, the investigators will identify patients already on heparin, evaluate steady state heparin anti-Xa levels and adjust patient's dose if necessary based on steady state anti-Xa levels.
Eligible patients will be started on heparin fixed-dose intraoperatively.
Steady state anti-Xa levels will be drawn at least 6 hours after initiation of heparin infusion.
Goal anti-Xa levels will be 0.1-0.35
IU/mL.
|
Patients will be placed on heparin infusions per their surgeon's discretion.
|
EXPERIMENTAL: Real time heparin dose adjustment
Patients with identified out of range levels will receive pharmacist-driven real time heparin dose adjustment and will receive follow-up steady state anti-Xa levels.
Anti-Xa level monitoring will be discontinued when in range peak levels are obtained, when heparin infusions are discontinued at surgeon discretion, or when the patient is discharged.
|
Patients will have steady state anti-Xa levels drawn at least 6 hours after initiation of heparin infusion.
Patients with out of range anti-Xa levels will receive real time heparin dose adjustment followed by repeat anti-Xa levels.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Number of Participants With Anti-Xa Levels Within Target Range (0.1-0.35 IU/mL)
Time Frame: Through study completion, an average of 1 year.
|
Anti-Xa levels are used to monitor anticoagulant therapy.
|
Through study completion, an average of 1 year.
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Number of Rate Adjustments
Time Frame: Through study completion, an average of 1 year.
|
Heparin rate adjustments were made for out of range anti-Xa levels (<0.1 and >0.35)
|
Through study completion, an average of 1 year.
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Investigators
- Principal Investigator: Corinne Bertolaccini, PharmD, University of Utah Health
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (ACTUAL)
November 10, 2016
Primary Completion (ACTUAL)
September 10, 2017
Study Completion (ACTUAL)
December 8, 2017
Study Registration Dates
First Submitted
November 11, 2016
First Submitted That Met QC Criteria
November 17, 2016
First Posted (ESTIMATE)
November 21, 2016
Study Record Updates
Last Update Posted (ACTUAL)
July 24, 2019
Last Update Submitted That Met QC Criteria
July 9, 2019
Last Verified
July 1, 2019
More Information
Terms related to this study
Additional Relevant MeSH Terms
- Cardiovascular Diseases
- Vascular Diseases
- Respiratory Tract Diseases
- Lung Diseases
- Embolism and Thrombosis
- Embolism
- Thrombosis
- Venous Thrombosis
- Thromboembolism
- Venous Thromboembolism
- Pulmonary Embolism
- Molecular Mechanisms of Pharmacological Action
- Fibrinolytic Agents
- Fibrin Modulating Agents
- Anticoagulants
- Heparin
- Calcium heparin
Other Study ID Numbers
- IRB_00095514
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
NO
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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