Transfusion Reactions Management
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Direct answer
Whatever the reaction, the first three actions are identical: stop the transfusion immediately, maintain venous access with normal saline, and recheck the patient's identity against the unit and the paperwork at the bedside. Acute haemolytic transfusion reaction — fever, flank pain and hypotension within minutes, almost always from an ABO clerical error — demands aggressive saline, forced diuresis and support of coagulation and renal function. Febrile non-haemolytic reactions are managed by slowing or pausing with an antipyretic; urticaria with pausing and an antihistamine. The high-stakes pair to separate is TRALI, non-cardiogenic pulmonary oedema within six hours treated with respiratory support and no diuretics, from TACO, volume overload treated with diuretics and upright positioning.
What you must remember
- Acute haemolytic (ABO): fever, loin pain, hypotension, haemoglobinuria, DIC within minutes of starting — resuscitate with saline, maintain urine output with fluids and diuretics, support the coagulopathy; the cause is almost always misidentification, so the bedside check is both prevention and investigation.
- Febrile non-haemolytic reaction: the commonest reaction — cytokines and leucocyte antibodies from donor white cells; managed by pause plus paracetamol, prevented by leucodepletion.
- Allergic spectrum: urticaria from plasma proteins (pause, antihistamine, restart if settled); anaphylaxis, recurrent and severe, suggests IgA deficiency with anti-IgA — thereafter use washed components.
- TRALI: acute hypoxia with bilateral infiltrates within six hours, fever and hypotension, from donor anti-HLA antibodies against recipient leucocytes — support oxygenation, no diuretics; a leading cause of transfusion-related mortality, prevented by avoiding high-plasma components from previously pregnant donors.
- TACO: volume overload of the elderly, renally impaired and cardiac patient — hypertension, positive fluid balance, response to diuretics; prevented by slower infusion rates and loop diuretics in high-risk recipients.
- Delayed haemolytic reaction: anamnestic response to Kidd, Rh or Kell antigens 3-14 days later with falling haemoglobin and jaundice — detect, support, and annotate the antibody record.
- Bacterial contamination: rigors and hyperpyrexia early, classically with room-temperature-stored platelets — stop, culture the patient and the unit, and start broad antibiotics.
- TA-GVHD: rash, diarrhoea and pancytopenia one to four weeks after transfusion in the immunocompromised or after directed donations from relatives — nearly uniformly fatal, prevented exclusively by irradiated components.
A typical exam case
A 70-year-old woman receiving her second unit post-operatively becomes acutely dyspnoeic with saturations of 84 percent, bilateral crackles and a blood pressure of 160/95. The sixty-second triage: stop the transfusion and check the label — then reason the TRALI-TACO axis. Hypertension, advanced age, positive fluid balance and rapid infusion favour TACO: sit her up, give furosemide, and she improves over hours. Had she been hypotensive and febrile with a normal fluid balance and clear prior units, TRALI would dominate: oxygen and respiratory support, explicitly no diuresis. If instead fever with dark urine and loin pain had appeared in the first ten minutes of the first unit, acute haemolysis from an ABO mismatch takes over the plan. One clinical picture, three rule-outs, and the discriminator is timing plus haemodynamics — exactly the structured discrimination a postgraduate long case grades.
Where students slip and the Indian context
Two slips recur. First, treating every fever during transfusion as haemolysis and sending the patient into panic protocols — most are febrile non-haemolytic reactions, managed by pausing and antipyretics, provided the identity check and the visual plasma inspection (for haemolysis) are clean. Second, missing the TA-GVHD rule that directed donations from close relatives require irradiation — a rule with particular Indian bite, since relatives are the commonest donors here and the shared haplotype lets donor lymphocytes engraft, graft and kill. The Indian context sharpens others: nucleic-acid testing of donor units has narrowed but not closed the transfusion-transmitted infection window, leucodepletion is near-universal in major centres but not universal nationally, and the bedside two-person check remains the single cheapest intervention against the ABO catastrophe — a viva answer worth stating in those words. Massive transfusion brings its own arithmetic for the exam: citrate-induced hypocalcaemia, hyperkalaemia, hypothermia and dilutional coagulopathy managed with balanced component replacement rather than blood alone.
Frequently asked questions
What is the immediate response to any suspected transfusion reaction?
Stop the transfusion, maintain intravenous access with normal saline, and verify patient-unit identity at the bedside before any further decision.
How are TRALI and TACO distinguished and treated differently?
TRALI presents within six hours with hypoxia, hypotension and no fluid overload — respiratory support, no diuretics; TACO shows hypertension and positive balance — diurese and sit upright.
Which patient group requires irradiated blood components?
The profoundly immunocompromised and recipients of directed donations from relatives — to prevent transfusion-associated graft-versus-host disease, which is otherwise uniformly fatal.
Why does anaphylaxis recur in IgA-deficient recipients?
They carry anti-IgA antibodies that react with donor plasma IgA — management after the event is washed cellular components and IgA-deficient donor pools where available.
Which component carries the highest bacterial contamination risk?
Platelets, because they are stored at room temperature — sudden rigors and high fever during platelet transfusion mean stop, culture both patient and unit, and treat as sepsis.
When does a delayed haemolytic transfusion reaction appear?
Three to fourteen days after transfusion, with falling haemoglobin and jaundice from an anamnestic antibody response — Kidd antibodies are the classic culprits.