Chart — Hematology
Transfusion Reaction Comparison Chart
Seven reactions, one table. The universal first action never changes — stop the transfusion and keep the line open with new saline tubing — and the columns below tell you what you are likely dealing with and what comes next.
Educational use only. Reaction management is directed by providers and blood bank protocol — this chart supports recognition, not independent treatment. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
Reactions Side by Side
| Reaction | Onset | Cause | Hallmark Findings | Nursing Action |
|---|---|---|---|---|
| Acute hemolytic | Minutes — usually within the first 15 | ABO incompatibility (recipient antibodies destroy donor cells) — almost always an identification error | Fever, chills, flank/back pain, hypotension, tachycardia, red or dark urine, sense of impending doom; can progress to shock, DIC, AKI | Stop immediately; new NS tubing to keep the vein open; treat shock; aggressive fluids for renal protection per orders; hemolysis workup; bag and tubing to blood bank |
| Febrile non-hemolytic | During or up to a few hours after | Recipient antibodies vs donor white cells / accumulated cytokines | Fever ≥1°C above baseline, chills, headache — without hemolysis or hemodynamic collapse | Stop and rule out hemolysis first; antipyretics per order; leukoreduced products reduce recurrence |
| Allergic (mild) | Minutes to hours | Recipient response to donor plasma proteins | Urticaria, pruritus, flushing — no airway, breathing, or BP involvement | Pause; antihistamine per order; the only reaction where the provider may resume the same unit once symptoms resolve |
| Anaphylactic | Seconds to minutes | Severe hypersensitivity — classically anti-IgA antibodies in IgA-deficient recipients | Hypotension, bronchospasm/wheeze, angioedema, urticaria, anxiety; rapid deterioration | Stop; epinephrine and airway support per protocol; rapid response; never restart; washed products for future transfusions |
| TRALI | During or within 6 hours | Donor antibodies prime recipient neutrophils → inflammatory lung injury | Acute hypoxemia, dyspnea, bilateral infiltrates, often fever and hypotension — without overload signs | Stop; oxygen and ventilatory support (often ICU); diuretics do not treat it; report — implicated donors are deferred |
| TACO | During or within hours, often late in the unit | Circulatory overload — volume infused faster than the patient can handle | Dyspnea, hypertension, tachycardia, JVD, crackles, orthopnea; risk highest in cardiac, renal, and older patients | Stop or slow per order; sit upright; oxygen; diuretics per order; prevent with slower rates and split units in at-risk patients |
| Septic | During or shortly after — often early and dramatic | Bacterially contaminated unit (platelets highest risk — stored at room temperature) | High fever, rigors, hypotension, vomiting; can collapse into septic shock | Stop; blood cultures from patient and unit; broad-spectrum antibiotics promptly per orders; sepsis management; unit to blood bank/lab |
Fast Differentiators
• Flank pain + dark urine + early onset → hemolytic until proven otherwise
• Dyspnea + hypertension + JVD → TACO · dyspnea + hypotension + fever → TRALI
• Hives alone → allergic; hives + airway/BP → anaphylaxis
• Rigors + high fever on platelets → think septic
• Fever alone is febrile non-hemolytic only after hemolysis is ruled out
Related Resources
Standards & sources
Fact-checked Jun 21, 2026This page is written to align with AABB (transfusion standards) · American Society of Hematology (ASH). It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →