- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01318811
A Comparison of Dilute Versus Concentrated Heparin for CRRT Anticoagulation
A Comparison of Dilute Unfractionated Heparin and Standard Concentrated Unfractionated Heparin Protocols for Anticoagulation of the Extra-corporeal Circuit During Continuous Renal Replacement Therapy in the ICU
Study Overview
Status
Conditions
Intervention / Treatment
Detailed Description
Our study will compare two protocols using heparin for anticoagulation of the extra-corporeal circuit during CRRT. Study subjects will be recruited from patients started on continuous venovenous hemodialysis (CVVHD) in all intensive care units at Vanderbilt University Medical Center (VUMC). Once enrolled, patients will be pragmatic cluster-randomized (by month of entry) into one of two study arms. Arm A will receive dilute heparin and arm B will receive standard concentrated heparin as both approaches are standard practices at VUMC. Heparin will be delivered as an intravenous infusion proximal to the dialysis filter in both groups. Replacement of the extra-corporeal circuit, including the dialysis filter, is performed under several circumstances: stopping of CRRT when the subject is transported out of the ICU for a procedure or study, machine malfunction, and clotting of the filter. All CRRT circuits and filters, regardless of patency, are replaced at 72 hours per our dialysis unit protocol. Only data from the first filter used for CVVHD will be used and the study subject's enrollment will end with replacement of the extracorporeal circuit and filter.
Study subjects will receive standard care for the duration of the study and the inpatient Nephrology team will control all aspects of the dialysis treatment. Changes to the heparin infusion rates will be made based on the heparin nomogram for this study and it applies to either arm. A copy of this nomogram will be provided to the inpatient Nephrology team who will make adjustments to the heparin infusion as required to maintain blood anticoagulation levels at goal. The principle investigators (PIs) will be available at all times by pager and phone to address questions regarding proper adjustment of the heparin infusion and will monitor each heparin dosing change to ensure consistency in implementation of the study protocol.
The following is a summary for the two interventions (arms):
Treatment Algorithm Dilute heparin: Patients in the dilute heparin arm (enrolled in odd calendar months) will receive a systemic loading dose of heparin of 15 units per kilogram of weight (all heparin doses will be rounded to the nearest 100 units) by rapid (< 10 seconds) intravenous bolus. The heparin concentration for the rapid intravenous loading bolus is 1000 units per mL. Then a maintenance rate of heparin of 7.5 U/Kg per hour will be started. Heparin will be delivered as a solution of 2 units/mL and the infusion will be prepared with 2,000 units of heparin in 1,000 mL of 0.9% NaCl and delivered intravenously proximal to the dialysis filter.
Standard concentrated heparin: Patients in the concentrated heparin arm (enrolled in even calendar months) will receive a systemic loading dose of heparin of 15 units per kilogram of weight* by rapid (< 10 seconds) intravenous bolus. The heparin concentration for the rapid intravenous loading bolus for this arm is also 1000 units per mL. Then a maintenance rate of heparin of 7.5 U/Kg per hour will be started and delivered via a syringe on the Prismaflex® proximal to the dialysis filter. The concentration of heparin used will be 1,000 units of heparin per mL of 0.9% NaCl.
Dose monitoring and adjustment: aPTT tests will be measured at baseline and at regular intervals thereafter. Adjustment of the heparin dose will be made using a heparin nomogram (see below) if the aPTT is not at the target level of greater than 35 seconds and less than 50 seconds. aPTT levels will be monitored every six hours routinely. If a significant change is made to the heparin infusion rate due to a prolonged aPTT, the aPTT will be checked at a shorter interval of three hours to ensure that aPTT is not persistently at a supratherapeutic level as this could increase risk for bleeding complications.
Nomogram for heparin infusion:
aPTT (in seconds)< 35, infusion (continue), infusion rate change (increase 10%), repeat aPTT (in 6 hours);
aPTT (in seconds) 35 to 50, infusion (continue), infusion rate change (no change), repeat aPTT (in 6 hours);
aPTT (in seconds) 51 to 60, infusion (stop for 1/2 hour), infusion rate change (decrease 10%), repeat aPTT (in 3 hours);
aPTT (in seconds) 61 to 70, infusion (stop for 1 hour), infusion rate change (decrease 20%), repeat aPTT (in 3 hours);
aPTT (in seconds) 71 to 80, infusion (stop for 1.5 hours), infusion rate change (decrease 20%), repeat aPTT (in 3 hours);
aPTT (in seconds) >80, infusion (stop for 2 hours), infusion rate change (decrease 20%), repeat aPTT (in 3 hours);
For the purposes of this study, data will only be collected from the first filter used during the CVVHD treatment. Following the end of the study enrollment period patients will continue on CVVHD and heparin infusions at the discretion of their treating physicians. Heparin infusions will continue to be adjusted based on the heparin nomogram.
Study Type
Enrollment (Actual)
Phase
- Phase 4
Contacts and Locations
Study Locations
-
-
Tennessee
-
Nashville, Tennessee, United States, 37232
- Vanderbilt University Medical Center
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Description
Inclusion Criteria:
- Age greater than 18 years
- Renal failure, electrolyte disturbance, or volume overload requiring continuous venovenous hemodialysis (CVVHD) as determined by the Nephrology consult service
Exclusion Criteria:
- Age less than 18 years
- Active bleeding
- Coagulopathy as defined by baseline INR > 1.8, aPTT > 45 seconds, or platelet count < 50 thousand/μL
- Active administration of systemic anticoagulation (such as warfarin, therapeutic unfractionated heparin, or therapeutic enoxaparin)
- Contraindication to heparin (allergy, thrombocytopenia with platelet count < 50, known or suspected heparin induced thrombocytopenia [HIT])
- Contraindication to systemic anticoagulation (recent surgical or other invasive procedure, significant bleeding disorder, concern for intracranial bleeding, or other contraindication as determined by treating physician)
- Administration of drotrecogin (Xigris™)
- Anticipated surgical or other invasive procedure that would necessitate withdrawal of anticoagulation within 72 hours
- Expected termination of continuous renal replacement therapy (CRRT) or death in < 24 hours
- The need for more than 500 cc an hour of IV fluids delivered proximal to the filter for the purpose of performing continuous venovenous hemofiltration (CVVH) or continuous venovenous hemodiafiltration (CVVHDF)
Study Plan
How is the study designed?
Design Details
- Primary Purpose: Treatment
- Allocation: Randomized
- Interventional Model: Parallel Assignment
- Masking: None (Open Label)
Arms and Interventions
Participant Group / Arm |
Intervention / Treatment |
---|---|
Active Comparator: Dilute heparin
Arm A will receive dilute heparin delivered as an intravenous infusion proximal to the dialysis filter.
|
Patients in the dilute heparin arm will receive a systemic loading dose of heparin of 15 units per kilogram of weight by rapid intravenous bolus.
Then a maintenance rate of heparin of 7.5 U/Kg per hour will be started.
Heparin will be delivered as a solution of 2 units/mL and the infusion will be prepared with 2,000 units of heparin in 1,000 mL of 0.9% NaCl and delivered intravenously proximal to the dialysis filter.
Other Names:
|
Active Comparator: Standard concentrated heparin
Arm B will receive standard concentrated heparin and will be delivered as an intravenous infusion proximal to the dialysis filter.
|
Patients in the standard heparin arm will receive a systemic loading dose of heparin of 15 units per kilogram of weight by rapid intravenous bolus.
Then a maintenance rate of heparin of 7.5 U/Kg per hour will be started and delivered in a standard concentration intravenously proximal to the dialysis filter via a syringe.
The concentration of heparin used will be 1,000 units of heparin per 1 mL of 0.9% NaCl.
Other Names:
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Filter Life
Time Frame: 72 hours
|
The primary endpoint for this study will be the difference in filter life in hours between the group receiving dilute heparin and the group receiving standard concentrated heparin.
|
72 hours
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Number of Major Bleeding Complications
Time Frame: 72 hours
|
Information on major bleeding complications, and need for blood product transfusions will be collected.
|
72 hours
|
Collaborators and Investigators
Sponsor
Investigators
- Principal Investigator: Thomas A Golper, MD, Vanderbilt University
Publications and helpful links
General Publications
- Tsujimoto H, Tsujimoto Y, Nakata Y, Fujii T, Takahashi S, Akazawa M, Kataoka Y. Pharmacological interventions for preventing clotting of extracorporeal circuits during continuous renal replacement therapy. Cochrane Database Syst Rev. 2020 Dec 14;12(12):CD012467. doi: 10.1002/14651858.CD012467.pub3.
- Tolwani AJ, Wille KM. Anticoagulation for continuous renal replacement therapy. Semin Dial. 2009 Mar-Apr;22(2):141-5. doi: 10.1111/j.1525-139X.2008.00545.x.
- van de Wetering J, Westendorp RG, van der Hoeven JG, Stolk B, Feuth JD, Chang PC. Heparin use in continuous renal replacement procedures: the struggle between filter coagulation and patient hemorrhage. J Am Soc Nephrol. 1996 Jan;7(1):145-50. doi: 10.1681/ASN.V71145.
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
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
Other Study ID Numbers
- VU 110162
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.
Clinical Trials on Heart Failure
-
Tufts Medical CenterMetro West Medical CenterCompletedCongestive Heart Failure | Diastolic Heart Failure | Systolic Heart FailureUnited States
-
Abbott Medical DevicesCompletedHeart Failure | Heart Failure, Diastolic | Heart Failure, Systolic | Heart Failure NYHA Class II | Heart Failure NYHA Class III | Heart Failure With Reduced Ejection Fraction | Heart Failure NYHA Class IV | Heart Failure With Normal Ejection Fraction | Heart Failure; With Decompensation | Heart Failure...United States, Canada
-
Manipal UniversityUnknownHeart Failure | Decompensated Heart Failure | Acute Heart Failure | Diastolic Heart Failure | Systolic Heart FailureIndia
-
VA Eastern Colorado Health Care SystemNational Institute on Aging (NIA)CompletedHeart Failure | Heart Failure, Diastolic | Heart Failure, Systolic | Heart Failure With Reduced Ejection Fraction | Heart Failure With Preserved Ejection Fraction | Heart Failure; With Decompensation | Heart Failure,Congestive | Heart Failure AcuteUnited States
-
University Hospital, MontpellierCompletedHeart Failure | Diastolic Heart Failure | Systolic Heart Failure Stage CFrance
-
Lancaster General HospitalLouise von Hess Medical Research InstituteEnrolling by invitationDiastolic Heart FailureUnited States
-
Wake Forest UniversityCompletedHeart Failure, Congestive | Heart Failure With Preserved Ejection Fraction
-
Wake Forest UniversityNational Institute on Aging (NIA)CompletedHeart Failure, Congestive | Diastolic Heart FailureUnited States
-
US Department of Veterans AffairsCompleted
-
Giresun UniversityIstanbul University - Cerrahpasa (IUC)RecruitingHeart Failure | Diastolic Heart Failure | Systolic Heart FailureTurkey
Clinical Trials on Dilute unfractionated heparin
-
Robert F. JamesIndiana University School of MedicineSuspendedNeurobehavioral Manifestations | Aneurysmal Subarachnoid Hemorrhage | Vasospasm, Intracranial | Intracranial Aneurysm | Heparin-induced Thrombocytopenia Type IIUnited States
-
Christine RibicMcMaster University; LEO PharmaCompleted
-
University of PatrasCompletedCoronary AngiographyGreece
-
University of California, Los AngelesCompletedPregnancy Related | Antepartum DVTUnited States
-
Beijing Chao Yang HospitalCompletedVascular Diseases | Thrombosis | Thromboembolism | Pulmonary EmbolismChina
-
University Hospital, AntwerpUnknownHemodialysis | Acute Kidney InjuryBelgium
-
Kristian KarstoftActive, not recruitingBlood Coagulation DisorderDenmark
-
Academisch Medisch Centrum - Universiteit van Amsterdam...Dutch Burns FoundationTerminatedBurn Injury | Inhalation InjuryNetherlands, Australia, Belgium
-
Indonesia UniversityCompletedSevere Sepsis With Septic Shock | Severe Sepsis Without Septic ShockIndonesia