There are a minimum number of hours specified by Federal Aviation Regulations (FARs) Part 61. I don't know the average now, but the national average used to be about 20 hours over the minimum. Those students who took less than the national average were those who took 3 to 5 lessons a week (some went 7 days).
A rare but very serious risk associated with blood transfusions is transfusion-related acute lung injury (TRALI). It occurs more often with platelets and plasma than with red cells. TRALI is a poorly understood condition, in which a personâs lungs suddenly become very inflamed within six hours of the transfusion.
etting a blood transfusion in the hospital can. save your life. You may need a lot of blood if. you are bleeding heavily because of an injury. or illness. But anemia is usually not urgent. And usually you. donât need a lot of blood. You may only need one. unit of blood while you are in the hospital.