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Clinical Reference
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Acute Hemolytic Transfusion Reaction
Cardiovascular Presentations
Abdominal aortic aneurysm
Acute coronary syndrome (NSTEMI)
Acute coronary syndrome (STEMI)
Acute decompensated heart failure
Acute limb ischemia
Acute mesenteric ischemia
Aortic dissection
Aortic stenosis
Atrial fibrillation and flutter
Bradyarrhythmia and heart block
Cardiac arrest
Deep vein thrombosis
Myocarditis
Pericarditis
Pulmonary embolism
Stable angina
Superficial thrombophlebitis
Superior vena cava syndrome
Supraventricular tachycardia
Syncope (cardiogenic)
Unstable angina
Ventricular tachycardia
Respiratory Presentations
Acute bronchitis
Acute respiratory failure
Aspiration pneumonia
Asthma exacerbation
Bronchiolitis
Community-acquired pneumonia
COVID-19 pneumonia
COPD exacerbation
Croup
Croup (laryngotracheobronchitis)
Epiglottitis
Hemothorax
Hospital-acquired pneumonia
Pleural effusion
Pneumothorax (traumatic)
Pulmonary contusion
Spontaneous pneumothorax
Neurological Presentations
Bell's palsy
Benign paroxysmal positional vertigo
Brain abscess
Cauda equina syndrome
Cervical radiculopathy
Concussion (mild traumatic brain injury)
Encephalitis
Guillain-Barré syndrome
Hemorrhagic stroke (intracerebral)
Ischemic stroke
Lumbar radiculopathy
Malignant spinal cord compression
Migraine
Peripheral neuropathy (acute)
Retropharyngeal abscess
Schizophrenia (acute exacerbation)
Seizure (breakthrough:known epilepsy)
Seizure (first-time)
Spinal cord injury
Status epilepticus
Subarachnoid hemorrhage
Tension headache
Transient ischemic attack
Traumatic brain injury (moderate-severe)
Vestibular neuritis
Viral meningitis
Gastrointestinal Presentations
Acute appendicitis
Acute cholecystitis
Acute diverticulitis
Acute pancreatitis
Anal fissure
Choledocholithiasis and cholangitis
Clostridioides difficile colitis
Gastritis
Gastroenteritis (viral and bacterial)
Gastroesophageal reflux disease
Incarcerated or strangulated hernia
Inflammatory bowel disease flare
Large bowel obstruction
Lower GI hemorrhage
Peptic ulcer disease
Perforated viscus
Small bowel obstruction
Upper GI hemorrhage
Genitourinary and Reproductive Presentations
Acute prostatitis
Acute urinary retention
Ectopic pregnancy
Epididymitis
Orchitis
Ovarian torsion
Paraphimosis
Pelvic inflammatory disease
Priapism
Pyelonephritis
Renal laceration
Ruptured ovarian cyst
Testicular torsion
Tubo-ovarian abscess
Urinary tract infection (uncomplicated)
Urolithiasis (renal colic)
Vaginal bleeding (non-pregnant)
Infectious Disease Presentations
Acute sinusitis
Acute tonsillitis
Acute upper respiratory infection
Animal bite
Bacterial meningitis
Cellulitis
Conjunctivitis (bacterial)
Dental abscess
Endocarditis
Febrile neutropenia
Fournier gangrene
Hand-foot-mouth disease
Hepatitis (acute)
Herpes zoster
HIV-related illness
Human bite
Impetigo
Infected diabetic foot ulcer
Infectious mononucleosis
Influenza
Necrotizing fasciitis
Osteomyelitis
Otitis externa
Parasitic infection
Periorbital cellulitis
Peritonsillar abscess
Scabies
Sepsis
Septic arthritis
Spontaneous bacterial peritonitis
Tick-borne illness (Lyme disease)
Tinea infection
Tuberculosis
Viral exanthem
Wound infection
Trauma Presentations
Achilles tendon rupture
ACL and mceniscus tear
Ankle fracture
Ankle sprain
Burn
Calcaneus fracture
Cervical spine fracture
Clavicle fracture
Dental avulsion
Distal radius fracture
Drowning
Elbow fracture and dislocation
Electrical injury
Facial bone fracture
Facial laceration
Femur fracture
Fingertip amputation
Forearm fracture (radius and ulna)
Frostbite
Hand:finger laceration
Heat exhaustion
Heat stroke
Hip fracture
Humeral shaft fracture
Knee dislocation
Knee sprain
Lightning injury
Mandible fracture
Metacarpal fracture
Metatarsal fracture
Muscle strain
Nasal fracture
Non-accidental trauma
Orbital fracture
Patella fracture
Phalanx fracture (finger)
Proximal humerus fracture
Pulmonary contusion
Rib fracture
Rotator cuff tear (acute traumatic)
Scalp laceration
Scaphoid fracture
Shoulder dislocation
Skull fracture
Splenic laceration
Sternal fracture
Supracondylar pediatric fracture
Tendon laceration (hand:wrist)
Thoracic and lumbar spine fracture
Tibia:fibula fracture
Tibial plateau fracture
Toe fracture
Traumatic epistaxis
Traumatic hyphema
Toxicologic Presentations
Acetaminophen toxicity
Alcohol intoxication
Alcohol withdrawal
Anticholinergic toxicity
Anticoagulant overdose
Benzodiazepine overdose
Benzodiazepine:sedative overdose
Beta-blocker and calcium channel blocker toxicity
Carbon monoxide poisoning
Caustic ingestion
Digoxin toxicity
Drug eruption
Foreign body ingestion
Opioid intoxication
Opioid overdose
Opioid withdrawal
Organophosphate
Salicylate toxicity
Serotonin syndrome
Stimulant intoxication (cocaine, methamphetamine)
Tricyclic antidepressant overdose
Psychiatric Presentations
Acute anxiety
Acute psychosis
Agitation:behavioral emergency
Bipolar disorder
Conversion disorder
Major depressive episode
Neuroleptic malignant syndrome
Suicidal ideation and attempt
Musculoskeletal and Rheumatologic Presentations
Acute low back pain (mechanical)
Bursitis
Cervical radiculopathy
Costochondritis
Gout (acute)
Lumbar radiculopathy
Pseudogout
Tendinitis
Dermatology Presentations
Acute eczema (Eczema acute flare)
Allergic contact dermatitis
Erythema multiforme
Henoch-Schönlein purpura
Pressure injury
Psoriasis (acute flare)
Stevens-Johnson syndrome
Toxic epidermal necrolysis
Urticaria (acute)
Environmental and Exposure Presentations
Envenomation (snake, spider, insect)
High-altitude illness
Hypothermia
Hematologic and Oncologic Presentations
Acute chest syndrome
Coagulopathy
Hyperviscosity syndrome
Sickle cell crisis (vaso-occlusive)
Symptomatic anemia
Thrombocytopenia (severe)
Tumor lysis syndrome
Pediatric-Specific Presentations
Bronchiolitis
Croup
Emergency delivery
Febrile seizure
Kawasaki disease
Neonatal jaundice
Neonatal sepsis
Nursemaid's elbow
Pediatric fever 0 to 28 days
Pediatric fever 29 to 60 days
Pediatric fever 61 to 90 days
Pyloric stenosis
Slipped capital femoral epiphysis
Intussusception
Endocrine and Metabolic Presentations
Adrenal crisis
Diabetic ketoacidosis
Hypercalcemia
Hyperosmolar hyperglycemic state
Hypertensive emergency
Hypertensive urgency
Hypoglycemia
Myasthenia gravis crisis
Myxedema coma
Severe hyperkalemia
Severe hyponatremia
Thyroid storm
ENT and Maxillofacial Presentations
Acute laryngitis
Acute otitis media
Acute pharyngitis
Cerumen impaction
Epistaxis (anterior)
Nasal foreign body
Otitis externa
Tympanic membrane perforation
Ophthalmologic Presentations
Acute angle-closure glaucoma
Central retinal artery occlusion
Chemical eye injury
Corneal abrasion
Corneal ulcer
Globe rupture
Ocular foreign body
Orbital cellulitis
Retinal detachment
Obstetric Presentations
Hyperemesis gravidarum
Painful vaginal bleeding in pregnancy
Placenta previa
Placental abruption
Preeclampsia:eclampsia
Preterm labor
Threatened:inevitable:incomplete abortion
Systemic and Miscellaneous Presentations
Anaphylaxis
Angioedema
Cannabis-induced hyperemesis
Acute Hemolytic Transfusion Reaction
POCUS
Procedures
Calculators
Resuscitation
ECG Guide
Back
Clinical Assessment Checklist
Browse categories and answer follow-up questions to refine your symptom profile.
Approach to the Critical Patient
Immediate priorities
First-second actions
▶
Stop the transfusion immediately
▶
Do not flush the existing line
Disconnect tubing at the catheter hub
Maintain IV access with normal saline through a new line
▶
Fresh tubing to avoid further antigen exposure
Wide-open isotonic crystalloid for perfusion
Save the unit, tubing, and all attached components
▶
Return to blood bank for serologic analysis
Quarantine co-components from the same donation
Airway and breathing threats
▶
Anaphylactoid overlap
▶
Stridor or angioedema
Bronchospasm with wheeze
Oxygenation failure
▶
SpO2 < 90% on room air
PaO2 < 60 mmHg
If airway compromise, prepare for definitive airway control
▶
Rapid sequence intubation readiness
Anesthesia or critical care at bedside
Circulation and shock threats
▶
Hemolysis-driven shock physiology
▶
SBP < 90 mmHg
MAP < 65 mmHg
Massive intravascular hemolysis markers
▶
Gross hemoglobinuria
Sense of impending doom
If hypotensive, fluid resuscitation then vasopressors
▶
Isotonic saline bolus first
Dopamine infusion for refractory hypotension
Bedside verification
Clerical recheck
▶
Patient identity against the unit label
▶
Wristband versus tag match
Interdict any second misidentified unit
Volume and rate already infused
▶
Mortality risk rises with >= 200 mL incompatible blood
As little as 25 mL fatal in children
Early specimen capture
▶
Draw blood before free hemoglobin clears
▶
Plasma free hemoglobin
Repeat type and crossmatch
Catheterized urine sample
▶
Inspect for red or brown discoloration
Urine free hemoglobin
Team activation
Notification triggers
▶
Transfusion medicine and blood bank immediately
▶
Initiate serologic workup
Quarantine related components
Nephrology early
▶
High acute kidney injury risk
Anticipate possible dialysis
Hematology for complex cases
▶
Hyperhemolysis in sickle cell disease
Refractory or recurrent hemolysis
History
Presentation pattern
Classic triad
▶
Fever
▶
Temperature rise >= 1 C from baseline
Chills and rigors
Flank or back pain
▶
Renal capsular distension
Pain at the IV infusion site
Dark or reddish urine
▶
Hemoglobinuria
Onset during or soon after transfusion
Temporal relationship
▶
Symptom onset within minutes to 24 hours of transfusion start
▶
Minutes for ABO incompatibility
Hours for lower-titer non-ABO antibodies
Association with rate and volume infused
▶
Faster infusion accelerates onset
Quantify mL already delivered
Associated symptoms
Systemic complaints
▶
Sense of impending doom
▶
Well-described early symptom
Should not be dismissed as anxiety
Nausea and vomiting
▶
May accompany rigors
Headache co-occurrence
Chest tightness and dyspnea
▶
Overlap with TRALI and TACO
Palpitations
Occult presentation
▶
Sedated or anesthetized patient
▶
Hemoglobinuria may be only sign
Unexplained intraoperative shock
Maintain high suspicion intraoperatively
▶
Diffuse oozing from surgical field
Unexplained tachycardia under anesthesia
Risk factors
Identification errors
▶
Wrong blood in tube at collection
▶
Most common root cause
Bedside mismatch at administration
High-risk settings
▶
Emergency and trauma with bypassed checks
Institutions without electronic verification
Host alloimmunization risk
▶
Multiple prior transfusions
▶
Accumulated alloantibodies
Known RBC antibodies on record
Multiparity
▶
Pregnancy-related sensitization
Prior alloimmunization history
Prior allogeneic stem-cell transplant
▶
Preformed donor-derived antibodies
Minor ABO mismatch states
Hemoglobinopathies
▶
Sickle cell disease hyperhemolysis risk
Thalassemia chronic transfusion exposure
Physical Exam
Vitals and general
Stability snapshot
▶
Temperature
▶
Rise >= 1 C as a defining sign
Rigors with spiking fever
Blood pressure
▶
SBP < 90 mmHg as shock marker
MAP < 65 mmHg
Heart rate and respiratory rate
▶
Sinus tachycardia expected
Tachypnea from acidosis or distress
General appearance
▶
Diaphoresis and restlessness
▶
Anxiety and impending doom
Altered mental status
Skin findings
▶
Flushing early
Jaundice as later hemolysis sign
Organ-system exam
Cardiopulmonary
▶
Signs of shock
▶
Cool clammy peripheries
Delayed capillary refill
Pulmonary
▶
Crackles if fluid overload or ARDS
Tachypnea
Abdomen and infusion site
▶
Flank tenderness
▶
Renal capsular distension
Costovertebral angle discomfort
IV site
▶
Pain or erythema along the vein
Local warmth
Bleeding and urine assessment
DIC screen
▶
Oozing from line sites
▶
Venipuncture bleeding
Mucosal hemorrhage
Cutaneous signs
▶
Petechiae
Ecchymoses
Urine inspection
▶
Color
▶
Red or brown hemoglobinuria
Distinguish from hematuria
Output
▶
Oliguria as renal injury marker
Anuria as severe injury marker
Differential Diagnosis
Transfusion reaction spectrum
Acute hemolytic transfusion reaction
▶
ICD-10 T80.910A
▶
ABO incompatibility most common
Positive direct antiglobulin test
Distinguishing features
▶
Hemoglobinuria and low haptoglobin
Fever with flank pain
Febrile non-hemolytic transfusion reaction
▶
ICD-10 R50.84
▶
Most common transfusion reaction
Fever and chills without hemolysis
Distinguishing features
▶
Normal haptoglobin
Negative direct antiglobulin test
Allergic and anaphylactic reaction
▶
ICD-10 T80.51XA
▶
Urticaria and bronchospasm
Anaphylaxis in IgA-deficient patients
Distinguishing features
▶
No hemolysis
Cutaneous predominance
Respiratory and overload mimics
Transfusion-related acute lung injury
▶
Acute respiratory distress within 6 hours
▶
Bilateral pulmonary infiltrates
Normotensive or hypotensive
No hemolysis
▶
Normal haptoglobin
Negative direct antiglobulin test
Transfusion-associated circulatory overload
▶
Dyspnea with hypertension
▶
Pulmonary edema
Elevated BNP
No hemolysis
▶
Cardiomegaly on imaging
Response to diuresis
Hemolysis without immune mismatch
Septic transfusion reaction
▶
Bacterial contamination of the unit
▶
High fever and rigors
Gram stain and culture of unit diagnostic
Shock physiology overlap
▶
Distinguish by positive unit culture
Endotoxin-mediated collapse
Non-immune hemolysis
▶
Mechanical or thermal RBC destruction
▶
Pump or pressure injury
Overheated or frozen unit
Negative direct antiglobulin test
▶
Osmotic lysis from co-infused fluids
No serologic incompatibility
Hyperhemolytic and autoimmune
▶
Hyperhemolytic transfusion reaction
▶
Post-transfusion Hb below pre-transfusion level
Bystander destruction of native RBCs
Autoimmune hemolytic anemia
▶
Positive direct antiglobulin test
Not temporally linked to transfusion
Laboratory Tests
Hemolysis confirmation
Direct serologic testing
▶
Direct antiglobulin test
▶
Newly positive result is pathognomonic
May be negative if complexes clear before sampling
Repeat ABO and Rh typing with crossmatch
▶
Confirm serologic incompatibility
Compare pre- and post-transfusion samples
Indirect antiglobulin test
▶
Detect circulating recipient antibodies
Antibody identification panel if non-ABO suspected
Hemolysis biomarkers
▶
Plasma free hemoglobin
▶
Elevated and clears rapidly
Obtain early for highest yield
Haptoglobin
▶
Low or undetectable
Consumed binding free hemoglobin
LDH and indirect bilirubin
▶
LDH elevated from lysed RBCs
Indirect bilirubin elevated from heme catabolism
Organ function and complications
Complete blood count
▶
Falling hemoglobin
▶
Failure of expected post-transfusion rise
Spherocytes on peripheral smear
Platelet trend
▶
Consumption in DIC
Threshold for replacement
Basic metabolic panel
▶
Hyperkalemia from lysed cells
▶
Monitor for ECG changes
Trigger aggressive correction
Rising creatinine
▶
Heme-mediated tubular injury
Track urine output hourly
Coagulation panel
▶
PT INR and aPTT
▶
Prolongation in consumptive coagulopathy
Guide FFP replacement
Fibrinogen and D-dimer
▶
Low fibrinogen and high D-dimer support DIC
Cryoprecipitate threshold guidance
Point-of-care and unit testing
Visual inspection
▶
Plasma color
▶
Pink or red indicates hemoglobinemia
Centrifuged post-transfusion specimen
Urine color
▶
Dark urine indicates hemoglobinuria
Differentiate from myoglobinuria
Unit microbiology
▶
Gram stain of remaining product
▶
Rule out bacterial contamination
Distinguish septic reaction
Culture of remaining product
▶
Paired with patient blood cultures
Identify contaminating organism
Diagnostic Tests
Scoring Systems
Severity and DIC stratification
▶
ISTH DIC score
▶
Platelet count component
Fibrinogen component
D-dimer or fibrin marker component
PT prolongation component
Score >= 5 compatible with overt DIC
Volume-based severity estimate
▶
>= 200 mL incompatible blood as high-mortality threshold
Smaller volumes lethal in children
Limitations
▶
Lab testing does not reliably predict severity
Clinical trajectory supersedes any score
AKI staging adjunct
▶
KDIGO acute kidney injury criteria
▶
Creatinine rise thresholds
Urine output thresholds
Application
▶
Guide nephrology timing
Anticipate dialysis need
MRI
MRI role
▶
Limited acute utility
▶
Not required for diagnosis
Availability and stability constraints
Problem-solving indications
▶
Renal cortical necrosis characterization
CNS evaluation if focal deficit
Contraindications
▶
Hemodynamic instability
Non-compatible implants
CT
CT abdomen and pelvis
▶
Indications
▶
Alternative abdominal pathology suspected
Persistent flank pain without clear cause
Findings
▶
Renal perfusion abnormalities
Exclude obstruction or hemorrhage
Contrast considerations
▶
Weigh nephrotoxicity against benefit
Avoid in evolving acute kidney injury when possible
CT chest
▶
Indications
▶
Respiratory failure with unclear etiology
Distinguish TRALI pattern from edema
Findings
▶
Bilateral infiltrates in lung injury
Pulmonary edema in overload
Ultrasound
Renal ultrasound
▶
Indications
▶
Oliguria or anuria
Assess for obstruction
Findings
▶
Exclude hydronephrosis
Evaluate cortical echogenicity
Advantages
▶
No contrast or radiation
Bedside availability in unstable patients
Cardiac and lung POCUS
▶
Shock differentiation
▶
LV function gross estimate
IVC volume assessment
Lung assessment
▶
B-lines suggesting overload
Distinguish TACO from hemolytic shock
Disposition
Level of care
ICU admission
▶
All confirmed AHTR
▶
Continuous monitoring required
Risk of rapid deterioration
Specific triggers
▶
Shock or vasopressor need
DIC with active bleeding
Renal support readiness
▶
Oliguria or hyperkalemia
Dialysis access planning
Observation insufficient
▶
Rapid progression risk
▶
Shock and DIC
Acute renal failure
Continuous reassessment
▶
Hourly urine output
Serial vital signs
Consultation and reporting
Mandatory notifications
▶
Transfusion medicine and blood bank
▶
Serologic workup
Quarantine co-components
Nephrology and hematology
▶
Early AKI management
Complex hemolysis support
Regulatory and safety reporting
▶
Institutional transfusion safety committee
▶
Document reaction in record
Root cause analysis of identification error
External reporting
▶
Report fatalities to the regulator
Hemovigilance program submission
Follow-up and recovery
Copy
Serial monitoring
▶
Labs every 4 to 6 hours until stable
▶
Hemoglobin and renal function
Coagulation and urine output
Expected course
▶
Most reactions self-limited with prompt care
Renal function usually recovers
Patient counseling at recovery
▶
Inform of identified antibody
▶
Provide transfusion reaction card
Medical alert for future transfusions
Update transfusion history
▶
Future crossmatch accounts for antibody
Avoid recurrence
Treatment
Immediate resuscitation
Stop and stabilize
▶
Stop the transfusion and keep line open with saline
▶
New tubing and isotonic crystalloid
Save the unit for analysis
Aggressive isotonic saline
▶
Maintain urine output 0.5 to 1 mL/kg/hr
Bolus then titrate to perfusion
If refractory hypotension, vasopressor support
▶
Dopamine IV infusion 2 to 10 mcg/kg/min
Titrate to MAP >= 65 mmHg
Forced diuresis to protect kidneys
▶
Furosemide IV
▶
40 mg IV bolus initial
Then 10 to 40 mg/hr continuous infusion
Avoid if hypotensive
Forced alkaline diuresis
▶
Sodium bicarbonate 130 mmol/l in D5W at 200 mL/hr
Separate dedicated IV line
Target urinary pH > 6.5
Stop if arterial pH > 7.5 or no urinary pH response in 2 to 3 hours
Electrolyte and metabolic management
Hyperkalemia correction
▶
Membrane stabilization
▶
Calcium gluconate 1 to 2 g IV over 5 to 10 minutes
Repeat for persistent ECG changes
Intracellular shift
▶
Regular insulin 10 units IV with dextrose
Salbutamol 10 to 20 mg nebulized
Potassium elimination
▶
Cation exchange resin orally
Dialysis if refractory or anuric
Cautions
▶
Mannitol not evidence-based
▶
Use cautiously in anemia and limited cardiac reserve
Not routine therapy
DIC and coagulopathy support
Component replacement
▶
Platelets
▶
Maintain count > 20,000 per mm3
Higher target with active bleeding
Fresh frozen plasma
▶
Maintain INR < 2.0
Replace consumed clotting factors
Cryoprecipitate
▶
Maintain fibrinogen > 1.0 g/l
For active hemorrhage with hypofibrinogenemia
Bleeding source control
▶
Treat underlying hemolysis as the driver
▶
Component support is temporizing
Reassess after transfusion stopped
Local hemostasis
▶
Pressure at line and puncture sites
Minimize invasive procedures
Refractory and special therapies
Plasma exchange
▶
Indications
▶
Large-volume incompatible transfusion
Cardiac or renal comorbidity with macroscopic hemoglobinuria
Goal
▶
Remove incompatible cells and free hemoglobin
Adjunct in severe cases
Immunomodulation
▶
IVIG
▶
Considered in hyperhemolytic reactions
Particularly in sickle cell disease
Complement inhibition
▶
Eculizumab in refractory hyperhemolysis
Not standard for typical AHTR
Glucocorticoids
▶
Routine high-dose steroids not supported
Reserve for refractory or hyperhemolytic cases
Special Populations
Pregnancy
Maternal considerations
▶
Higher alloimmunization baseline
▶
Multiparity increases antibody risk
Prior pregnancy sensitization
Resuscitation targets
▶
Maintain maternal SpO2 >= 95%
Left lateral tilt to optimize venous return
Fetal monitoring
▶
Continuous monitoring when viable gestation
Obstetric involvement early
Therapy adjustments
▶
Volume status caution
▶
Increased plasma volume baseline
Balance against pulmonary edema risk
Medication safety
▶
Furosemide and bicarbonate as indicated
Coordinate eculizumab use with specialists
Geriatric
Physiologic vulnerability
▶
Reduced cardiac reserve
▶
Limited tolerance for aggressive fluids
Higher overload risk
Reduced renal reserve
▶
Faster progression to AKI
Lower threshold for nephrology
Presentation and management
▶
Atypical features
▶
Delirium as a primary sign
Blunted fever response
Cautious diuresis
▶
Monitor for hypotension
Frequent electrolyte reassessment
Pediatrics
Heightened lethality
▶
Small incompatible volumes can be fatal
▶
As little as 25 mL reported lethal
Vigilance at low infused volumes
Weight-based resuscitation
▶
Isotonic saline 20 mL/kg boluses
Reassess perfusion after each bolus
Weight-based therapy
▶
Furosemide
▶
1 mg/kg IV initial dose
Titrate to urine output if not hypotensive
Dopamine
▶
2 to 10 mcg/kg/min infusion
Titrate to age-appropriate MAP
Component replacement
▶
Platelets 10 mL/kg
FFP 10 to 15 mL/kg for coagulopathy
Background
Epidemiology
Incidence and causes
▶
Identification failure is the leading cause
▶
Wrong blood in tube at collection
Bedside misidentification at administration
Higher risk groups
▶
Multiply transfused patients
Multiparous women
Sickle cell and thalassemia patients
Setting-related risk
▶
Emergency and trauma with bypassed checks
Centers lacking electronic verification
Outcomes
▶
Mortality determinants
▶
>= 200 mL incompatible blood high-mortality threshold
Recipient antibody titer
Pediatric vulnerability
▶
Small lethal volumes
Lower physiologic reserve
Pathophysiology
Immune mechanism
▶
Antigen-antibody binding
▶
Preformed IgM against ABO antigens
Non-ABO IgG alloantibodies
Complement activation
▶
Membrane attack complex formation
Intravascular hemolysis
Downstream injury
▶
Free hemoglobin effects
▶
Nitric oxide scavenging and vasoconstriction
Heme-mediated tubular necrosis
Coagulation activation
▶
Tissue factor release triggers DIC
Consumptive coagulopathy and bleeding
Systemic inflammation
▶
Cytokine release and shock
Progression to multiorgan failure
Therapeutic Considerations
Supportive care principles
▶
No specific pharmacologic antidote
▶
Management is supportive
Stopping transfusion is the critical first step
Renal protection priorities
▶
Maintain brisk urine output
Forced alkaline diuresis targets
Evidence base and prevention
▶
Mannitol and steroids not routinely supported
▶
Reserve advanced therapies for refractory cases
Plasma exchange for selected severe presentations
Prevention as the highest-yield intervention
▶
Zero-tolerance labeling policies
Electronic patient verification systems
Patient Discharge Instructions
copy discharge instructions
Copy
Transfusion reaction home care
▶
You had a serious reaction to a blood transfusion
Take all prescribed medications exactly as directed
Drink fluids and rest as advised
Keep all follow-up appointments
Carry your reaction information
▶
Keep the transfusion reaction card with you
Tell every future provider about this reaction
Wear a medical alert if advised
Warning signs to return to ER
▶
Fever or chills
Dark or red urine
Passing little or no urine
New bruising or bleeding
Lightheadedness or fainting
Trouble breathing or chest pain
Follow-up plan
▶
Blood work to confirm recovery as scheduled
Kidney function recheck if advised
Specialist visit if instructed
References
Guidelines and key sources
Primary reviews
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Panch SR, Montemayor-Garcia C, Klein HG. Hemolytic Transfusion Reactions. NEJM 2019
Delaney M, Wendel S, Bercovitz RS, et al. Transfusion Reactions. Lancet 2016
Jones DE, Walker JJ, Abellada AMP. Hematologic Emergencies. AFP 2024
Specialty references
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Panch SR, Montemayor C. Hemolytic transfusion reactions. Rossi's Principles of Transfusion Medicine 6e 2022
Andic N, Teke HU, Gunduz E. Plasma Exchange in Acute Hemolytic Reaction. Transfusion Medicine 2023
Chou ST, Alsawas M, Fasano RM, et al. ASH 2020 Guidelines for Sickle Cell Disease Transfusion Support. Blood Advances 2020
Epidemiologic data
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Stone EF, Chacreton D, Jimenez A, et al. Epidemiology of Pediatric Transfusion Reactions. JAMA Network Open 2026
Institutional hemovigilance program reports
Coding standards
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ICD-10 T80.910A acute hemolytic transfusion reaction unspecified incompatibility
SNOMED CT acute hemolytic transfusion reaction disorder concept
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Acute Hemolytic Transfusion Reaction