Cardiac Surgery Clinical Trial
— POISONOfficial title:
Scanning Electron Microscopy (SEM) and Confocal Imaging of Clot in Two Different Protamine Environments (PrOtamIne doSing clOt imagiNg (POISON) Study)
Verified date | May 2024 |
Source | Papworth Hospital NHS Foundation Trust |
Contact | n/a |
Is FDA regulated | No |
Health authority | |
Study type | Observational |
The proposed study involves using two different high-resolution microscopic imaging techniques to examine the health and platelet invasion of clot in patients who were given 1:1 protamine / heparin and compare this to clot from patients who had heparin reversed using the PRODOSE algorithm. Patients will be treated according to the routine clinical practice of their individual care team.
Status | Not yet recruiting |
Enrollment | 20 |
Est. completion date | December 31, 2024 |
Est. primary completion date | December 31, 2024 |
Accepts healthy volunteers | No |
Gender | All |
Age group | N/A and older |
Eligibility | Inclusion Criteria: - undergoing elective, uncomplicated single procedure cardiac surgery with anticipated CPB duration < 120 min - with all anticoagulant drugs stopped at least 5 days before surgery, apart from aspirin - with normal full blood count and clotting screen pre-OP. Exclusion Criteria: - emergency surgery - inability to stop anticoagulants except aspirin for 5 days pre-OP - complex surgery with anticipated CPB duration > 120min - operations planned to be done at temperature on CPB < 34 degrees - operations requiring deep hypothermic circulatory arrest, solid organ transplantation - know blood dyscrasia - intra-operative blood or blood product transfusion or post-operative coagulopathy |
Country | Name | City | State |
---|---|---|---|
United Kingdom | Royal Papworth Hospital NHS Foundation Trust | Cambridge | Cambridgeshire |
Lead Sponsor | Collaborator |
---|---|
Papworth Hospital NHS Foundation Trust | Medical Research Council, University of Liverpool, University of Oxford |
United Kingdom,
Miles LF, Burt C, Arrowsmith J, McKie MA, Villar SS, Govender P, Shaylor R, Tan Z, De Silva R, Falter F. Optimal protamine dosing after cardiopulmonary bypass: The PRODOSE adaptive randomised controlled trial. PLoS Med. 2021 Jun 7;18(6):e1003658. doi: 10.1371/journal.pmed.1003658. eCollection 2021 Jun. — View Citation
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | High-resolution microscopic images (Scanning Electron Microscopy and Confocal Imaging) | The proposed study involves using two different high-resolution microscopic imaging techniques to examine the health and platelet invasion of clot in patients who were given 1:1 protamine / heparin and compare this to clot from patients who had heparin reversed using the PRODOSE algorithm.
This is an observational study in which differences between images of clot obtained from samples from the two patient groups and before and after cardiopulmonary bypass will be described. |
Pre Heparin and Post Protamine [5 minutes after heparin has been reversed] |
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