DMSO Cryopreserved Platelets in Cardiopulmonary Bypass Surgery (CRYPTICS)

Open to people ages 18 years and up

1. Male or female, at least 18 years of age
2. Undergoing CPB surgery with at least one risk factor for post-surgical bleeding including:
   1. All re-operative cardiac procedures.
   2. Expected bypass > 120 minutes.
   3. Any combined cardiac surgery procedures (e.g. multiple valve, valve/CABG).
   4. Any procedure that in the estimation of the surgical attending, has a high likelihood of receiving platelets
3. Ability to comprehend and willingness to sign informed consent.
4. If female of childbearing potential, have a negative pregnancy test on the day of the surgery and prior to the surgery agrees to use a method of highly effective birth control from the time of consent through the end of the safety follow-up period (Day 6 or discharge from hospital, whichever is earlier). Note: women must have been surgically sterilized [bilateral tubal ligation, bilateral oophorectomy, total hysterectomy) or postmenopausal (≥50 years of age and continuous amenorrhea for 24 months) to be considered non-childbearing potential.

Subjects meeting any of the following criteria will be excluded from the study:

1. Undergoing any of the following surgical procedures:
   1. Coronary artery bypass surgery alone
   2. Implantation of ventricular assist device
   3. Thoracoabdominal aortic aneurysm repair
2. Known or suspected pregnancy or breastfeeding
3. History of any major unprovoked thrombotic events
4. History of heparin-inducted thrombocytopenia
5. Active infection treated with antibiotics
6. Refuse transfusion of blood products for religious or other reasons
7. Previous enrollment in this study
8. Immune thrombocytopenic purpura
9. Known allergy to DMSO
10. In the judgement of the investigator, is not a good candidate for the study