the inside story of blood transfusion
DESCRIPTION
THE INSIDE STORY OF BLOOD TRANSFUSION. DR.MOHAMED BILAL DELVI ASSISTANT PROFESSOR DEPT OF ANAESTHESIA COLLEGE OF MEDICINE KSU. What is blood?. A highly specialised circulating tissue which has several types of cells suspended in a liquid medium called plasma. Origins from Greek ‘ haima ’ - PowerPoint PPT PresentationTRANSCRIPT
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THE INSIDE STORY OF BLOOD TRANSFUSION
DR.MOHAMED BILAL DELVIASSISTANT PROFESSORDEPT OF ANAESTHESIACOLLEGE OF MEDICINE KSU.
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What is blood?
A highly specialised circulating tissue which has several types of cells suspended in a liquid medium called plasma.
Origins from Greek ‘haima’
Blood is a life sustaining fluid
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Blood is an amazing fluid!
Keeps us warm
Provides nutrients for cells, tissues and organs
Removes waste products from various sites
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Blood components
Packed red cells Platelets Fresh Frozen Plasma Frozen plasma Cryoprecipitate Albumin Immunoglobulins
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INDICATIONS FOR BLOOD TRANSFUSION Massive blood loss
Different types of anaemia
Haemophilia & other clotting factor
deficiency
Cancer patients
For surgeries
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HISTORICAL ASPECTS
* 15th century- unsuccessful attempts.
1666- dog to dog transfusion
1667-animal to human
1818- human to human
1901- major breakthrough- discovery of A,B,O groups.
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HISTORICAL ASPECTS
1907- cross matching
1914- anticoagulant discovered
1936- first blood bank
1939/40- Rh factor discovery
1950- plastic blood containers.
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DOG TO DOG TRANSFUSION
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SHEEP TO HUMAN TRANSFUSION
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HUMAN TO HUMAN TRANSFUSION
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Theoretical Yield of components
1 unit of blood theoretically gives 1 unit FFP 1 unit PRBC’s 1 single donor unit cryoprecipitate, single
donor unit platelets Plasma for Ig and albumin
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BLOOD GROUP SYSTEMS
ABO System Most studied & important
Rh system from clinical point of view.
Lewis
Kell
Duffy
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BLOOD GROUP SYSTEMS
MNSs
Lutheran
P
Ii
kid
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DIFFERENT BLOOD GROUPS
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BLOOD GROUP ANTIGEN ANTIBODY
A
A
Anti-B
B B Anti-A
AB A,B None
O HAnti-A,Anti-B
Bombay Group
NoneAnti-A,Anti-B,&Anti-H
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RHESUS MONKEYS
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BLOOD DONATION CRITERIA Good general condition.
age- 18 to 60 years.
Weight- >45kg for 350ml, >55kg for 450ml.
BP: syst. 100-180mmHg diast. 50-100mmHg.
Pulse: 60 to 100beats/min.
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BLOOD DONATION CRITERIA
Temp. >37.5deg.C
Hb. >12.5gm%
Jaundice
Malaria
High risk behaviour
Pregnancy
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BLOOD DONATION CRITERIA
Surgeries
Last blood donation
Tattooing
Chronic diseases
Last blood transfusion
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INSTRUCTIONS TO DONOR AFTER DONATION
More fluids than usual.
Do not remain hungry.
Do not smoke for 1hour.
Remove bandage after 6 hours.
If bleeding from puncture site, apply pressure.
If feeling faint/dizzy, lie down.
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MISCONCEPTIONS/ REASONS FOR NOT DONATING BLOOD
Fear of contracting some disease
I do not have enough blood/ I will become weak.
I am too old
I am too busy.
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REASONS TO DONATE BLOOD
New blood formation .
Regular health check up.
Blood investigations done.
Satisfaction of noble work.
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TESTS DONE IN BLOOD BANK Blood grouping & Rh typing
Cross matching
Tests for irregular antibodies
HBsAg test
HCV test
HIV test
Test for syphilis
Test for malaria
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Cells v Serum Serum v Cells
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CellGrouping Serum Grouping Interpretation
Anti A
Anti B
Anti AB A cells B cells O cells
+ - + - + - A
- + + + - - B
+ + + - - - AB
- - - + + - O
- - - + + + Bombay Blood Group
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BLOOD GROUP
ANTIGEN ANTIBODY Can give blood to
Can receive blood from
A
A
Anti-B A,AB A,O
B B Anti-A B,AB B,O
AB A,B None AB A,B,AB,O
O HAnti-A,Anti-B A,B,AB O
Bombay Group
NoneAnti-A,Anti-B,&Anti-H
Bombaygroup (Oh)
Bombay group (Oh)
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MISMATCHED TRANSFUSION
Group A + Group B = Clumping of RBCs
+
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AUTOLOGOUS DONATION
Self help is the best help.
Planned gynaecological, orthopedic, plastic general surgeries
Individuals with rare blood groups/ irregular antibodies/ infectious disease positive.
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AUTOLOGOUS DONATIONAdvantages Safest blood.
Easy availability
No risk of TTDs
Best option in patients with irregular antibodies, rare blood groups, infectious disease positive.
Blood scarcity can be reduced to some extent.
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BLOOD COMPONENTS Blood separated into different parts. 1) Packed red cells 2) Platelets 3) Fresh frozen plasma 4) Cryoprecipitate 5) Granulocytes 6) Factor IX conc. 7) Factor VIII conc.
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COMPONENTS Advantages Overload avoided.
Better patient management.
Greater shelf life than whole blood.
Blood shortage can be overcome.
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COMPONENT SEPARATION
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COMPONENT SEPARATION
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FINAL PRODUCTS
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Blood component Contents Volume Shelf life
Whole blood Hct.35%,RBCs,WBCs.450ml blood,63mlCPDA1
520ml 35 days at 4deg.C.
Red cells Hct.60%,RBCs,25mlplasma,100 ml Adsol.
340ml 42 days at4deg.C
Platelets Platelets,few WBCs,RBCs,50ml plasma
50ml 5 days at22deg.C
FFP
Cryoppt.
Pl.proteins,clot.FactorsFibrinogen,factor VIII,IX.
225ml
15ml
1year at -18deg.C
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APHERESIS CELL SEPARATOR
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APHERESIS
Plasmapheresis: plasma is removed.
Plateletapheresis: platelets are removed.
Leukapheresis: leucocytes are removed.
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The rational use of blood and blood products
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BLOOD LOSS- Signs, Symptoms and Indication for Transfusion Volume Lost Clinical signs Preparation of choice mL % of Total Blood Volume
500 10 None; No transfusion or crystalloid solution
1000 20 tachycardia crystalloid solution or colloids or RBC if necesssary
1500 30 drop in BP crystalloid solution plus colloids plus RBC or blood if available
2000 40 shock crystalloid solution plus colloids plus RBC or blood if available
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RED CELLS TRANFUSION-Indication(1)
1. Whole blood• acute hypovolemia (hemorrhagic
shock) • massive transfusion• exchange transfusion in infants for
hemolytic anemia of the newborn
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Packed red cells
150-200 mls. of red cells with plasma removed
Haemoglobin 20g/ 100 ml, PCV 55-75
Expected rise in Hb with 1 unit of red cells is approximately 1g/dL
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Indications for Packed Cells
Massive blood loss
Anaemia of chronic disease
Haemoglobinopathies
Perioperative period to maintain Hb> 7g/dL
No need for transfusion with Hb >10
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Platelets
150-400 x109 /L
Platelet units can be either Single donor units Apheresis units
1 single donor unit contains 55 x109
1 apheresis unit contains 240x109
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Platelets
Stored at room temperature Constantly agitated Only last for 5 days 1 dose of platelets should raise patient’s
counts by 30 x109 after 1 hour Infused in 15 mins
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Indications for platelet transfusion
BLEEDING due to thrombocytopaenia
Due to platelet dysfunction
Prevention of spontaneous bleeding with counts < 20
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Recommended counts to avoid bleeding
Platelet count /ul
Clinical Condition
> 100 000 Major abdominal, chest or neurosurgery
> 50 000 Trauma, major surgery
> 30 000 Minor surgical procedures
> 20 000 Prevention/treatment of bleeding in pts with sepsis, leukemia, malignancy
> 10 000 Uncomplicated malignancy, leukemia
> 5 000 ITP patients at low risk
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FFP
Fresh Frozen Plasma
Plasma collected from single donor units or by apheresis
Frozen within 8 hours of collection
-18o to -30o C
Can last for a year
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FFP
1 unit is 250 ml Contains all plasma proteins Indications:
Correction of bleeding due to excess warfarin, Vitamin K deficiency, liver disease
DIC, dilutional coagulopathy Inherited factor XI deficiency TTP
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FFP
Dose: 15 mls/kg about 3-5 units
FFP and INR <2
Give at 1ml/kg per hour in likely fluid overload patients
Given within 24 hours of thawing
Requesting FFP
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Frozen Plasma
Plasma frozen within 24 hours of collection
Maintains level of plasma proteins except factor VIII
Same indications as FFP
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Cryoprecipitate
FFP thawed at 4oC and centrifuged
Cryoprecipitate is the by-product
Contains Fibrinogen, Factor VIII, Factor XIII, von Willebrand’s Factor
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Cryoprecipitate
No longer indicated for Hemophilia*
Source of Fibrinogen in acquired coagulopathies as in DIC; platelet dysfunction in uremia
Indicated for bleeding in vWD, Factor XIII deficiency
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Cryoprecipitate
Infused as quickly as possible
Give within 6 hours of thawing
10-15 mls; usually 10 units pooled
10 bags contain approx. 2gm of fibrinogen and should raise fibrinogen level to 70mg/dL
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Almost there!!!!!!!
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Appropriateness of transfusion May be life-saving
May have acute or delayed complications
Puts patient at risk unnecessarily
‘ The transfusion of safe blood products to treat any condition leading to significant morbidity or mortality, that cannot be managed by any other means’.
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Inappropriateness of transfusion Giving blood products for conditions that can
otherwise be treated e.g. anaemia
Using blood products when other fluids work just as well
Blood is often unnecessarily given to raise a patient’s haemoglobin level before surgery or to allow earlier discharge from hospital. These are rarely valid reasons for transfusion.
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Inappropriateness of Transfusion Patients’ transfusion requirements can often
be minimized by good anaesthetic and surgical management.
Blood not needed exposes patient unnecessarily
Blood is an expensive, scarce resource. Unnecessary transfusions may cause a shortage of blood products for patients in real need.
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Problems faced Too few donors
Lack of equipment
Insufficient products
Insufficient reagent
Infectious disease testing
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Recommendations Increase public awareness about need for blood and
hence the number of voluntary donors
Continue to encourage relatives to donate for patients*
Increase the number of mobile clinics
Extend the opening hours for blood collecting
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Recommendations Management of stocks of blood and blood products Maintenance and replacement of equipment
On-going training of Haematology Lab Staff
Better management of reagents for- infectious disease testing, antigens etc.
Improved record keeping
Move to electronic record keeping
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Recommendations View to reduce the need for allogeneic
transfusions Autologous transfusions
Blood saving devices in OR
Acute normovolemic haemodilution
Oxygen carrying compounds
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Bibliography Uptodate.com British Transfusion guidelines 2007 Clinical use of blood, WHO MJA: Tuckfield et al.,Reduction of inappropriate use of blood products by
prospective monitoring of blood forms Transfusion practice: Palo et al., Population based audit of fresh frozen
plasma transfusion practices Vox Sanguinis: Titlestead et al., Monitoring transfusion practices at two
university hospitals Transfusion: Schramm et al., Influencing blood usage in Germany Transfusion: Healy et al., Effect of Fresh Frozen Plasma on Prothrombin
Time in patients with mild coagulation abnormalities Transfusion: Sullivan et al., Blood collection and transfusion in the USA in
2001 Transfusion: Triulzi, The art of plasma transfusion therapy
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