What Is A Blood Transfusion, Truly?

Despite multiple specialty society guidelines recommending not to transfuse blood if the hemoglobin levels are above 7-8 g/dL, many physicians disregard the recommendations. Why is that? Dr. Hassaballa discusses this issue. 

Article referenced in the show: https://www.pulmccm.org/p/guidelines-on-red-cell-transfusion