blood transfusion in surgery
TRANSCRIPT
BLOOD TRANSFUSION IN SURGERY
Dr kabiru salisuSurgery dept. AKTH
26th march, 2013
Introduction Donor selection and blood donation Blood component and their indications Pre-transfusion blood handling - blood grouping and compatibility testing - storage of blood - blood ordering Principles of blood administration Massive blood transfusion Autologous blood transfusion Complications and their management Blood substitutes Conclusion References
Out line
Process of administering blood or blood products into one’s circulation intravenous
Blood transfusion should only be considered when the benefit out weight the risk
Improvement in donor selection, blood screening and component isolation made BT a valuable tool for a surgeon
Introduction
Jean-Baptiste Denis 1667
Dr. Philip Physick 1825
Karl Landsteiner in 1900
Historical background
Homologous (Allogenic) blood transfusion when blood transfusion is done with blood
from another compatible donor of the same specie
Autologous blood transfusionAutologous blood transfusion is the collection
and subsequent re-infusion of the patient’s own blood
Classification
Donor selection involves History:
◦ Age 18-65years◦ Not in high risk group◦ No blood donation in past 6 months◦ No pregnancy within last 12 months, not lactating◦ No dental procedure in last 72 hours◦ No major surgery in past 6 months◦ No blood transfusion or organ transplant in past
12 months
BLOOD DONATION
◦ No tattoo or skin piercing in last 12 months◦ No needle stick injury or acupuncture in last
12month◦ Not vaccinated in last 4 weeks◦ No history of HIV infection, HBV, syphilis◦ Not on cytotoxics, hypoglycaemic agents, or
teratogenic drugs◦ Medical history: no HTN, DM, cardiac renal or liver
disease, cancer, bleeding disorder, SCD Examination
◦ Clinically stable◦ Weight >51kg◦ Normal BP, Pulse, chest and abdominal findings
Investigations◦ Hb 12.5g/dl or more (F), 13.5g/dl or more (M)◦ Seronegative for HIV I & II, HBsAg, HCV, VDRL
antibodies◦ No MPs◦ Negative for anti-CMV antibodies in some cases◦ Blood group
Severe haemorrhage following trauma or tumour
Preoperatively anaemia correction During major operation in which blood loss
is inevitable Postoperative anaemia To arrest haemorrhage or as a prophylactic
measure prior to operation in patients with haemorrhagic states
Anaemia from chronic surgical conditions
Indication for transfusion
1- Whole blood Contains all blood components
◦ Cellular element: RBC: 4.5-6.5 x 109/L (M), 3.9-5.6 x 109/L (F) WBC: 4-11 x 109/L Platelets: 150-400 x 109/L
◦ Plasma: clotting factors, proteins, electrolytes, gasses, glucose, minerals
Blood component and their indications
Fresh if collected and used within 3hours Use is limited to where fractions are not
available Indications-
◦ Sudden haemorrhage with loss of up to 20% of blood volume
◦ EBT◦ Lack of appropriate blood component
2- RBC Products Packed RBC:
◦ Obtained after centrifugation of whole blood at 3000r/m and removing the supernatant
◦ 1 unit increases Hb by 1g/dl in 70kg man◦ Indications Patients with chronic anaemia ElderlySmall childrenPatients prone to fluid overload & cardiac failure
Washed RBC:◦ Washed in saline to remove plasma proteins◦ Used in uncontrollable febrile or anaphylactic
reactions to plasma proteins◦ Shelf life is 24 hours
Irradiated RBC:◦ Gamma irradiation ◦ Indication is prevention of GvH disease in
Immunocompromised patients Intrauterine foetal blood transfusion
3- Platelet concentrates Obtained in 2 ways
◦ Manually: WB at 1000r/m for 3min , then supernatant at 3000r/m for 5min
◦ Automatically using processors Stored at 20-24oC with continuous agitation 5unit of WB give a pint Shelf life is 5 days Indicated Thrombocytopenia Consumptive coaglophaty Aplastic anaemia
4- Fresh frozen plasma WB- 3000r/m, separate and rapidly freeze
the supernatant for 8 hrs in CO2+ ethyl alcohol
Contains all components of coagulation and fibrinolytic system
Stored at -30 to -70 oC for up to 1 year Thaw at 37oC before use Dose= 10-15mls/kg
5- Cryoprecipitate
Is the precipitate when FFP is allowed to thaw at 4oC and the supernatant plasma removed
Rich in F8, F13, vWF, fibrinogen Stored at -30oC, shelf life is 12months
Indications haemophilia vonWillibrand’s diseas
6 - Granulocyte concentrates - These are prepared from single donors by
using cell separator Should be used within 24 hours (6hrs)
Indications for transfusion are uncommon Severe neutropenia <0.5 x 109/L Focal bacterial infection unresponsive
to antibiotics
Others Albumin concentrates Coagulation factor concentrates Immunoglobulins Anti thrombin III concentrate Protein concentrates
Pre transfusion blood handling
- storage of blood - blood grouping - compatibility testing - blood ordering
Standard blood bag contains 450 +/- 45mls blood, with 60mls of anticoagulant preservative
Stored at 2-6oC Anticoagulants include
◦ Heparin: 24 hours◦ Acid-citrate-dextrose (ACD) : 21 days◦ Citrate-phosphate-dextrose (CPD): 28 days◦ Citrate-phosphate-dextrose-adenine(CPDA): 35
days
Storage
RBC- - 1% cell population are lost per day of
storage - Viability decreases as ATP and 2,3 DPG
levels fall Increase affinity of Hb to O2 and
decrease O2 release at tissue level
Leucocytes and platelets-◦ Not viable after 24 hours of storage
Effects of storage
Electrolytes-◦ K+: plasma levels increase at rate of 1mmol/day◦ Na+: concentration increases because of the
sodium citrate in the CPD anticoagulant◦ Ca2+: no ionized calcium, it displaces sodium in
the anticoagulant forming unionized calcium citrate
pH-◦ Falls from 7.2 to about 6.8 at 20 days due to
increase lactic acid concentration from continuing anaerobic RBC glycolysis
Clotting factors-Activity of clotting factors fall after 24hrs
most lost activity after 7days
There are >30 major blood group system The most important blood group are the
ABO and Rh ABO system base on present of antigen A
or B Rh is base on presence of antigen D (Rh
factor) Other; Kell, duffy, MNS, lewis, kidda etc
Blood grouping
Blood group Antigen Antibody ( plasma agglutinin)
Donors
A Ag A Ab B A & O
B Ag B Ab A B & O
AB Ag A & B NONE ALL
o None Ab A&B O
ABO grouping
Cross matching is done to detect the rare Ags present on the recipient RBCs such as Kell, duffy
Plasma protein Ag capable of causing reaction can be detected
Compatibility testing
Maximal surgical blood ordering schedule ( MSBOS )
This is the system of blood ordering for elective surgeries
Blood bank know the standard require for each surgical procedure
For patient at high risk of bleeding extra pint are saved above requested
For patient with history of previous reaction or those fit can be arrange for PABD
Blood ordering
Should only be done when necessary Only what is needed should be given Indication should be clearly stated Counselling and consent Strict asepsis Doubly checked: name, age, hospital
number
Principles of blood administration
Check blood bag for damage, expiry date, discoloration of the blood
Pre transfusion vital signs IV line must be secure and patent before
opening the bag Warming with blood warmer when
necessary Administration must commence within
30mins of leaving the blood bank Monitoring is crucial esp. In 1st 30min
Determine volume to be transfused Use blood giving set, or infusion pump Symptoms of adverse effects usually occur
during transfusion of the first 100mls◦ Thus start at 20-30 d/m (2-3mls/min), then
increase to 60-80d/m after 1 hour◦ In children and elderly 40d/m
ADMINISTRATION AND RATE
The replacement by transfusion of bloodequivalent to or greater than a patient’s total
blood volume within a 24 hour period or
Replacement of more than half of the patient’s blood volume in 1 hour
Massive blood transfusion
Haemorrhagic shock fromTrauma eg #s, splenic ruptureRuptured aortic aneurysmMassive GI haemorrhageLiver transplant
INDICATIONS
1. Technical & clerical errors
2. Circulatory overload
3. Hypothermia
4. Hyperkalaemia
5. Hypocalcaemia (citrate toxicity)
6. Acidosis
7. ARDS
8. DIC
complications
1 - Platelet concentrate and fresh frozen plasma 1unit/5units of banked blood
2- 10mls of 10% Ca gluconate /L of blood
3- Fresh blood 1unit / 3unit of banked blood
precaution
Autologous blood transfusion is the collection and subsequent re-infusion of the patient’s own blood
1. Preoperative Autologous blood donation (PABD)
2. Acute Isovolemic Hemodilution
Autologous blood transfusion
1- Intra operative
Shed blood from a wound or body cavity during surgery is collected and subsequently re-infused into the same patient
blood Salvage
Methods of blood salvage should be Aseptic Anticoagulant filtration; 4-6 layers of gauze or special
filters Shelf life 4hrs at room temperature or
24hrs at 4o
Haemonetic cell savers can be use Contraindicated in tumour surgery,
contamination Complication;- Bleeding
2- post operative blood salvage
Blood shed after surgery can be collected and re-infuse to patient
Surgical procedure and autologous technique
IMMEDIATEREACTIONS I. Febrile non-haemolytic reaction 2. Allergic and anaphylactic reaction 3. Haemolytic reaction 4. Bacterial contamination 5. Circulatory overload 6 Cardiac arrest 7. Air embolism 8. Non-cardiogenic pulmonary oedema
complication
DELAYED REACTIONS 1. Thrombophlebitis.
2. Delayed haemolytic reaction.
3. Post-transfusion Thrombocytopaenic purpura
4. Transmission of diseases: (i) Viral hepatitis A, B, C, D (ii) Malaria (iii) Syphilis (iv) Cytomegalovirus infection (v) Trypanosomiasis (vi) Toxoplasmosis, brucellosis (vii) Infectious mononucleosis (viii) Variant Creutzfeldt-lacob Disease (vC1D). (ix) AIDS
5. Ironoverload(Transfusionhaemosiderosis)
6. Immunosuppression. Due probably to transfused leucocytes
7. Post-transfusion graft-versus-host disease
Include ◦ Plasma substitutes◦ Red cell substitutes◦ Platelet substitutes
BLOOD SUBSTITUDE
Plasma substitutes include◦Crystalloids: NS, RL◦Colloids: Dextrans- dextran 70, 40, 110 Gelatins- haemacel, gelofuscine
◦Stable plasma protein solution◦Albumin◦Hydroxyethyl starch preparations: Hetestarch, Pentastarch
Red cell substitutes◦ Diaspirin cross linked Hb: similar O2 transport and
exchange properties as whole blood◦ Perfluorocarbons: dissolve O2 and release to
tissues by diffusion◦ Encapsulated Hb◦ Stroma free Hb: high O2 affinity, nephrotoxic◦ Recombinant DNA derived Hb
Platelet substitute◦ Pegylated Recombinant Human Megakaryocyte
Growth and Development Factor (PEG-rHuMGDF)
Blood is a powerful therapeutic agent rational and judicious use is paramount
A surgeon must have have a sound knowledge on rational blood use
CONCLUSION
1. Badoe E. A; principles and practice of surgery, 4th edition
2. Morris P. J; Oxfort Text Book of surgery second edition, 2000
3. Courtney M. T; Sabiston Textbook of surgery 6th edition.
4. Drew p. & charles R. J; In Oxford handbook of clinical haematology, 2nd edition
5. Ganong W. F. In Review of Medical Physiology, 22nd edition.
6. Autologous blood transfusion, bloodindex.com7. M. Saleh Massoud M. D; Massive blood transfusion
Ain-Shams University
REFERENCES
Thank you