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Published byColin Stafford Modified over 7 years ago
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Blood Transfusion: It is best to AVOID it Dr. Syed Muhammad Irfan
MBBS, FCPS (PK), FACP (USA) Professor and Head Department of Hematology & Transfusion Medicine Liaquat National Hospital, Karachi 1
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Why we transfuse To restore or maintain Blood Volume
Improve Oxygen carrying capacity Achieve Hemostasis Leukocytes in neutropenic patients
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Can We do without blood Highly ethical and Professional
Issues pertinent to PK ? Shortage To avoid Adverse blood reactions Cost saving Personal / Religious concerns
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Avoiding blood & using Alternative
Indication and judicious use . . . Alternative Products: - Hematinic drugs - Growth Factors - Hemostatic Agents - Crystalloids, Colloids - Autologus Transfusion Therapeutic Practices Management Policies Miscellaneous
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If Transfusion is unavoidable
Blood is life saving but is life threatening also. Only when necessary Specific & safe product, Lowest effective dose & frequency Diagnose and treat the cause
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What to Transfuse Cellular Products: Red Cells Platelets Granulocytes:
Plasma products FFP Cryoprecipitate (CP) Other Products
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Red Cell Concentrate (RCC or PRC)
Universal Hb threshold ? ? Clinical decisions are best Ch anemias are well compensated; Identify and treat the cause Trigger in Acute Loss ? No functional plts and granulocytes Volume is about 200 cc 1 unit increases Hb: 1 gm / dl (HCT 3 % ) Use G canula
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“Group O” PRC are universal donors
How much, how frequent, How to give Transfuse as soon as you receive: 2-4 hr Perioperative period: > 8 gm/dl. We have no MSBOS (C/T ratio) Can use leukocyte filters / washed NS irradiated RC in special situations Autologus transfusion in some cases
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Practical transfusion 2006
When to transfuse PRC ? stable patients bleeding patients < 4g/dl: transfuse 4-7g/dl: Tx usually necessary 7-10g/dl: usually not necessary > 10 g/dl: Tx rarely required Blood loss < 15% : Fluids only; no blood Blood Loss 15-30% consider Tx 30-40% : Tx usually necessary > 40%: tx indicated Practical transfusion 2006
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Washed Red Cells
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Leukocyte Reduction Filters (maintains closed system)
Final unit must have less than 5 x 106 WBCs
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Platelets Treat Patient – Not counts
Clinical status is main determinant - Serious bleeds < 5000 - Uncomplicated: 10,000-20,000 is safe - Complicated: 30, ,000 - Epidural & Massive transf > 50,000 ? - Most surgeries: 80, ,000 - Neuro and retinal surg > 100,000 No Rh antigen. +ive can be given to –ive Survival is < 24 hrs
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Platelets Generally not indicated if no bleeding . . ITP,
Septicemia, DIC Drug induced Thrombocytopenia Hypersplenism TTP HIT and HITT Routine cross match is not require, but if contains more than 2ml of red cells. D typing is not require, less than 0.5 ml of red cells transfused carry small risk of immunization.
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Random Donor Must give in right dose: 1 unit / 10 kg
Mixed groups can be given Volume / unit: ml Increment: 5000 – 10,000/bag Not widely available in PK Less RBC and Leukocytes contamination 5.5x1010 per unit (55x109) ABO compatible preferably n=(P0-P1)x BSA/ CI=(P1-P0)x BSA/n
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Single Donor Increase 30,000 – 60,000 (equals 6-8 RDP) Advantages:
Less donors No volume overload Lesser disease transmission Less Plt Alloimmunization Volume: 250 ml Cost is the main concern 3x1011 per unit (300x109)
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Fresh Frozen Plasma Has all coagulation factors and AT-III
Usual dose: 1 bag / 10 kg ABO compatible & without regard to Rh Volume / unit is about 200 cc Not indicated as Plasma expander in routine cases Nutritional / Power source Immunoglobin source
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Fresh frozen plasma: indication
Deficiency: VIII, Fibrinogen, vWbD etc Prolonged PT/APTT in surgical patients Prolonged PT/APTT in bleeding patients Masive transfusion Reversal of warfarrin toxicity Replacement of protein C/S/ATIII Plasma exchange in TTP, BCSH guidelines 2004
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Cryoprecipitate Cryosupernatant By-product of FFP
Volume not a problem: just cc Group specific or mixed (without Rh type) Specifically used for factor VIII, I, XIII, VII deficiency and vWD. Topical hemostatic agent: Fibrin glue Cryosupernatant Volume about 180 cc Mainly contain Factor II, VII, IX, and X BCSH guidelines 2004
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Whole Blood 450 +/- 50 ml Rarely used and minimally available
No sufficient labile coagulation factor Restore blood volume & red cell mass Indications : - Exchange transfusion Acute massive loss: Contraindications Volume replacement correction of anemia in normovolumics
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Irradiated products WHY ? To Prevent TA-GVHD (Graft vs. Host Disease)
TA-GVHD carries 90 % mortality WHOM ? Family donors Immunocompromised recipients HLA matched SCT donors I/U transfusion
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More Special blood products CMV negative HbS negative Antigen negative
Deglycerolysed red cells Autologus blood 22
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Summarising . . . . Best to avoid transfusion
If indicated; go for specific component - It is Ethical - Less transfusion Reactions - Reduced cost - More availability Always consider alternatives
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References: AABB (USA) Ludman Blood Transfusion
ABC of Blood Transfusion (UK) 24
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