Diagnostic Interest of Leukocyte Immunophenotyping Using Multiparameter 8-color Flow Cytometry in Heart Surgery

University Hospital, Limoges60 enrolled

Overview

In septic patients, Septiflux1 study identified immature granulocytes which may have a diagnostic and prognostic interest. However, with these preliminary results it is not possible to make a difference between what is linked to the infection and what is a consequence of the inflammation which goes along with the septic process. Using flow cytometry, the study of leukocytes in a pure inflammatory model such as cardiopulmonary bypass in heart surgery could make possible to test the diagnostic interest of the immature granulocytes but also to attribute a prognostic value for the occurrence of post-operative infections.

Expression of CD10, CD16, CD24, CD64 on granulocytes, of CD14 and CD16 on monocytes and of CD3 on T lymphocytes. Flow cytometers will all be calibrated the same way using common reagents (known fluorescent calibration beads). Moreover, CD45 and CD3 level of expression on lymphocytes will help to check that the collection of data is standardized between the different centers.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Cardiac Surgery

Interventions

Whole bloodOTHER

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Patient older than 18 years old * Patient undergoing planned heart surgery with cardiopulmonary bypass Exclusion Criteria: * Pregnancy, * progressive solid cancer, * HIV infection, * history of blood or inflammatory disease, * long-term immunosuppressive treatment, * urgent surgical intervention, * documented preoperative infection

Outcomes

Primary Outcomes

Expression of the marker CD64, CD10 and CD16

Evolution rate of CD64, CD10 and CD16 in the immediate postoperative cardiac surgery

Time frame: 1 hour

Secondary Outcomes

Early onset of infectious complications

Early onset of infectious complications in the 7 days post-operative

Time frame: 7 days