Method for Improved Intraoperative Blood Loss Estimates

Method for Improved Intraoperative Blood Loss Estimates

The purpose of this study is to develop a mathematical algorithm which the investigators plan to use to more accurately estimate intraoperative blood loss.

Inclusion Criteria:

All elective surgical patients

Exclusion Criteria:

1. Age < 18
2. Pregnant women
3. Prisoners
4. Lack of informed consent
5. Attending Physician feels enrollment could interfere with optimal patient care
6. Patients who did not have a preoperative hemoglobin measured as part of their preoperative work-up
7. Patients whose preoperative hemoglobin fraction is abnormal.
8. Patients who will likely require an intraoperative blood transfusion.
9. Patients for whom the intraoperative use of the Cell Saver is anticipated.