Effects of Left Ventricular Assist Device Implantation on the Phenotype of Blood Platelets and Leucocytes (DAV-Hémo)

August 19, 2019 updated by: University Hospital, Toulouse

Study on the Effects of Left Ventricular Assist Device Implantation on the Phenotype of Blood Platelets and Leucocytes

To compare in vivo platelet and leukocyte activation and phenotype before and after Left ventricular assist device (LAVD) implantation

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

The present study plan to investigate platelet activation in vivo using a variety of biomarkers previously identified as sensitive to high shear stress in patients with severe aortic valve stenosis before and after trans arterial valve replacement. As one of the best biomarker is a high degree of platelet-leukocyte interactions, the study will study in parallel leukocytes activation/differentiation. These parameters will be compared at 3 time-points, before and after LAVD implantation in ambulatory patients.

Study Type

Interventional

Enrollment (Actual)

4

Phase

  • Not Applicable

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

  • France
      • Toulouse, France
        • University 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:

  • elective implantation of LAVD (Heartmate II),
  • written informed consent to the study
  • Patients with health insurance

Exclusion Criteria:

  • treatment or procedure that could affect platelet functions or turn-over(low-dose aspirin is allowed).
  • Pregnancy or breastfeeding
  • Juridical Protection

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: Basic Science
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: LAVD implantation
Ten patients before and after LAVD implantation had blood sampling
Other: Blood sampling
Three venous blood sampling before the left ventricular assist device implantation and 1 and 2 months after implantation in ambulatory patients.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Platelet activation
Time Frame: Month 2 after LAVD implantation
To compare platelet activation in vivo, using a composite criteria determinated by variety of biomarkers of activation analysed by flow cytometry and enzyme-linked immunosorbent assay (ELISA)
Month 2 after LAVD implantation

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Level of circulating platelet-leukocyte conjugate
Time Frame: Month 2 after LAVD implantation
To determine the level of circulating platelet-leukocyte conjugate by flow cytometry
Month 2 after LAVD implantation
Changes in leukocyte phenotype
Time Frame: Month 2 after LAVD implantation
To determine the leukocyte phenotype which is a composite criteria analysed by flow cytometry, ELISA and lipidaemic analysis
Month 2 after LAVD implantation

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University Hospital, Toulouse

Investigators

  • Study Chair: Pierre SIE, MD, PhD, University Hospital of Toulouse, Rangueil, Hematology laboratory

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)

October 3, 2017

Primary Completion (Actual)

August 23, 2018

Study Completion (Actual)

January 23, 2019

Study Registration Dates

First Submitted

July 24, 2017

First Submitted That Met QC Criteria

October 9, 2017

First Posted (Actual)

October 10, 2017

Study Record Updates

Last Update Posted (Actual)

August 20, 2019

Last Update Submitted That Met QC Criteria

August 19, 2019

Last Verified

August 1, 2019

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • RC31/16/8258
  • 2016-A01601-50 (Other Identifier: ID-RCB)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

No

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

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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