1492
Blood was taken from three young men and given to the stricken Pope Innocent VII. It is the first time a blood transfusion was recorded in history
CLOTTING
1869 Recommended sodium phosphate Braxton Hicks (1st to discover)
1901
Discovered the ABO blood groups Karl Landsteiner
1913
First to succeed in designing a device for performing blood transfusion Edward E. Lindermann He carried out vein-to-vein transfusion of blood by using multiple syringes and a special cannula
1913
Designed his syringe-valve apparatus for transfusions Lester Unger
1914
Reported the use of sodium citrate as an anticoagulant solution for transfusions Albert Hustin
1915
Determined the minimum amount of citrate needed for anticoagulation and demonstrated its nontoxicity in small amounts Richard Lewisohn
1916
Introduced a citrate-dextrose solution for the preservation of blood Rous and Turner
1941
During WWIII, developed techniques in blood transfusion and preservation led to the establishment of a widespread system of blood banks Dr. Charles Drew In February, Dr. Drew was appointed director of the first American Red Cross blood bank at Presbyterian Hospital
1943
Loutit and Mollison of England Introduced the formula for the preservative acid-citrate-dextrose (ACD)
1957
Gibson Introduced an improved preservative solution called citrate-phosphate-dextrose (CPD) CPD Less acidic Replaced ACD as the standard preservative used for blood storage
WHOLE BLOOD AMOUNT IN UNIT
Traditional 450mL +/- 10% of blood (1 pint) Recently 500mL +/- 20% of blood
For a 110-pound donor
a maximum volume of 525mL can be collected, including samples drawn for processing
The total blood volume of most adults
10 to 12 pits
Donors can replenish the fluid lost from the 1-pint donation
in 24 hours
The donor’s red cells are replaced
within 1 to 2 months after donation
A volunteer donor can donate whole blood
every 8 weeks
Blood Components
Packed Red Blood Cells (PRBCs) Platelets Plasma In recent years, less whole blood has been used to prepare platelets with the increased utilization of apheresis platelets Hence, many units are converted only into RBCs and plasma
Plasma
Can be converted by cryoprecipitation to a clotting factor concentrate
Clotting Factor Concentrate
Rich in antihemophilic factor A unit of whole blood prepared RBCs may be stored for 21 to 42 days, depending on the anticoagulant preservative solution used
RBC BIOLOGY AND PRESERVATION
Three areas of RBC biology are crucial for normal erythrocyte survival and function: Normal chemical composition and structure of the RBC membrane Hemoglobin structure and function RBC metabolism Defects in any or all of these areas will result in RBCs surviving less than the normal 120 days in circulation
ADDITIVE SOLUTIONS
Preserving solutions that are added to the RBCs after removal of the plasma with or without platelets Removal of the plasma component during the preparation of RBC concentrates Removed much of the nutrients needed to maintain RBCs during storage
Currently, three additive solutions are licensed in the United States
Adsol (AS-1; Baxter Healthcare) Nutricel (AS-3: Pall Corporation) Optisol (AS-5; Terumo Corporation)
GENETICS
INHERITANCE Refers to how organisms pass on information in their genes to create new generations of the same species, or variations of the original Mendelian Genetics Classical genetics Refers to the basic law of inheritance Direct result of Mendel’s experiment