13.2 Blood Products & Transfusion Therapy
Key Takeaways
- ABO and Rh compatibility rules protect against acute hemolytic reactions: type & screen establishes blood type and antibodies; crossmatch verifies donor unit compatibility before RBC transfusion when required.
- Match product to need: packed RBCs for oxygen-carrying capacity, platelets for thrombocytopenia/bleeding risk, FFP for coagulation factor replacement, and cryoprecipitate for fibrinogen (and selected factor) support at a high level.
- Two-nurse independent verification of patient identity and product labels is mandatory; infuse RBCs typically within 4 hours of issue/start per standards; use 0.9% sodium chloride only with blood—not LR or dextrose solutions as the co-infusion fluid.
- For suspected transfusion reactions, STOP the transfusion, keep the IV line open with normal saline (new tubing per protocol), assess ABCs/vitals, notify provider and blood bank, and return product/tubing as required.
- Differentiate reaction patterns: acute hemolytic, febrile non-hemolytic, allergic/anaphylactic, TRALI, and TACO—recognition drives whether the problem is immune hemolysis, fluid overload, or pulmonary injury.
Transfusion therapy on the CRNI blueprint
Domain 3F Blood and Blood Component Therapy tests whether you can select, verify, administer, and rescue blood products like an infusion specialist. Errors in identification or reaction response are among the highest-harm events in nursing—CRNI expects disciplined process, not casual “hang and hope.”
Quick Answer: Know ABO/Rh, type & screen vs crossmatch, product roles (PRBCs, platelets, FFP, cryo), 2-nurse check, RBC ≤ ~4 hours, NS only with blood, and for reactions: STOP, keep line open with NS, notify provider/blood bank. Distinguish acute hemolytic, FNHTR, allergic/anaphylactic, TRALI, TACO.
ABO and Rh compatibility principles
ABO system (concept level)
Red cells carry A and/or B antigens; plasma contains the opposite isohemagglutinins (antibodies). Incompatible RBC transfusion can trigger acute intravascular hemolysis—a sentinel-event pattern.
| Recipient type | Can typically receive RBCs from | Plasma considerations (high level) |
|---|---|---|
| O | O | O is universal RBC donor; O plasma is not universal |
| A | A, O | |
| B | B, O | |
| AB | AB, A, B, O | AB often considered universal plasma donor conceptually |
Rh (D): Rh-negative patients, especially women of childbearing potential, should avoid unnecessary Rh-positive RBC exposure when Rh-negative units are available, to prevent alloimmunization. Emergency uncrossmatched O-negative (or institutional emergency O strategy) may be used in life-threatening bleeding per protocol—still document and transition to type-specific products ASAP.
Type & screen vs crossmatch
| Test | What it does | When it matters |
|---|---|---|
| Type & screen | Determines ABO/Rh and screens for unexpected red-cell antibodies | Baseline for possible transfusion; may support electronic crossmatch pathways when screen is negative |
| Crossmatch | Serologic or electronic compatibility check between patient and specific donor unit | Required pathway before many RBC transfusions, especially with antibodies or per blood bank rules |
Nursing role: draw correctly labeled specimens (two-identifier rules, no drawing from a line that contaminates the type), send promptly, and never hang a unit that does not match the patient’s identifiers and blood bank release documentation.
Exam trap: Relying on “I know this patient” memory instead of formal identification against the product tag.
Major blood products and high-level indications
| Product | Primary purpose | High-level indication themes |
|---|---|---|
| Packed RBCs (PRBCs) | Increase oxygen-carrying capacity | Symptomatic anemia, acute blood loss with impaired oxygen delivery—not automatic transfusion for every low number without clinical context |
| Platelets | Support primary hemostasis | Thrombocytopenia with bleeding or high procedural/bleeding risk per thresholds |
| Fresh frozen plasma (FFP) | Replace multiple coagulation factors | Coagulopathy with bleeding or invasive procedure need; massive transfusion protocols; selected factor deficiencies when concentrates unavailable |
| Cryoprecipitate | Concentrated fibrinogen (also factors VIII, XIII, vWF in classic teaching) | Hypofibrinogenemia, selected bleeding scenarios, some obstetric hemorrhage protocols |
Additional products (albumin, plasma derivatives, granulocytes, factor concentrates) appear in specialty practice; know that albumin is not a substitute for PRBCs for oxygen delivery and that volume expanders ≠ clotting factor replacement.
Pretransfusion verification and administration rules
Two-nurse check
Two qualified clinicians independently verify at the bedside:
- Patient identity (name, unique identifiers—ask patient to state name/DOB when able)
- ABO/Rh and unit number match between product label, transfusion record, and patient blood bank band/record
- Expiration date/time and product appearance (clots, discoloration, leaks—do not hang compromised units)
- Special requirements (CMV-safe, irradiated, washed, antigen-negative) when ordered
Remain with the patient for the initial monitoring period (commonly the first 15 minutes) and recheck vitals per policy. Baseline vitals before start are mandatory for later reaction comparison.
Infusion time limits and equipment
- RBCs: complete typically within 4 hours of removal from controlled storage/start per standards—bacteria can proliferate in warm blood.
- Platelets and plasma have their own handling/time rules—follow blood bank labeling; do not store platelets in a medication refrigerator against policy.
- Use a blood administration set with an appropriate filter (standard 170–260 micron clot filter themes).
- 0.9% sodium chloride (NS) is the standard compatible fluid with blood components.
- Do not co-infuse blood with lactated Ringer’s (calcium can promote clotting in the set) or dextrose-containing solutions (can cause hemolysis/clumping themes) as the Y-site fluid.
- Do not add medications to the blood bag. No IV push drugs into the blood tubing while the unit is running unless policy creates a separate lumen plan.
- Warmers and pressure devices only as ordered/indicated—unmonitored microwave or hot-water warming is forbidden.
Exam trap: Piggybacking blood with D5NS or LR “because that’s what was hanging.”
Transfusion reactions: recognize, stop, support
Universal first response
For any suspected acute transfusion reaction:
- STOP the transfusion immediately.
- Maintain IV access; keep the line open with normal saline—typically with new tubing so residual blood in the set does not continue into the patient (follow exact facility steps).
- Assess ABCs, mental status, vitals, urine color, pain, dyspnea, rash.
- Notify the provider and blood bank promptly.
- Recheck clerical identification at the bedside (wrong unit to wrong patient is a classic cause of hemolytic reaction).
- Send remaining product, tubing, and required labs/urine per protocol; document meticulously.
- Do not restart the same unit after a significant reaction without explicit blood bank/provider direction.
Reaction patterns (high-yield differentiation)
| Reaction | Typical clues | Nursing implications |
|---|---|---|
| Acute hemolytic (AHTR) | Fever, flank/back/chest pain, hemoglobinuria, hypotension, anxiety, DIC/bleeding—often within minutes; ABO mismatch classic | Stop immediately; aggressive support; medical emergency; prevent further incompatible product |
| Febrile non-hemolytic (FNHTR) | Fever/chills without hemolysis evidence; cytokine/leukocyte related | Stop and evaluate to exclude hemolysis; antipyretics as ordered; leukocyte-reduced products reduce risk |
| Allergic | Urticaria, pruritus, mild rash | Stop/assess; antihistamines as ordered; mild isolated urticaria may allow cautious restart of same unit only if protocol and provider allow after treatment—many facilities require full workup first |
| Anaphylactic | Bronchospasm, angioedema, hypotension, shock—IgA deficiency theme sometimes cited | Stop; epinephrine and emergency protocol; never minimize airway symptoms |
| TRALI (transfusion-related acute lung injury) | Acute respiratory distress, hypoxemia, non-cardiogenic pulmonary edema during/within hours of transfusion | Stop; oxygen/ventilatory support; report as serious reaction; distinguish from TACO |
| TACO (transfusion-associated circulatory overload) | Dyspnea, hypertension, tachycardia, elevated JVP, positive fluid balance—cardiogenic overload pattern | Stop/slow future strategy; upright position, oxygen, diuretics as ordered; rate and volume planning for at-risk patients |
TRALI vs TACO is a frequent exam discriminator: both cause respiratory distress after transfusion, but TACO looks like volume overload/heart failure (hypertension, response to diuretics), while TRALI is permeability/non-cardiogenic edema (often fever, hypotension or normal BP themes, not simply “too much fluid”). Exact labs (BNP, chest x-ray, echo) are ordered by the team; nursing contribution is early recognition, stop, support, and accurate description.
Delayed reactions (delayed hemolytic, TA-GVHD in rare settings) exist but acute bedside recognition of the table above drives most CRNI items.
Special administration considerations
- Massive transfusion: follow institutional MTP ratios, warmer use, electrolyte monitoring (citrate-related hypocalcemia, hyperkalemia themes), and communication with blood bank.
- Jehovah’s Witness / refusal: respect informed refusal; document; offer alternatives per ethics/policy—never coerce.
- Religious/cultural and consent: verify consent is complete before elective transfusion.
- Pediatric and elderly: weight-based volumes, slower rates, higher TACO sensitivity in frail elders and cardiac patients—split units or slower rates as ordered.
- Autologous vs allogeneic: same verification rigor; autologous is not risk-free (bacterial contamination, clerical error still possible).
Scenarios
Scenario A — Wrong fluid: Blood arrives; only LR is hanging. Spike a new NS primary for the blood set; do not Y-site blood into LR.
Scenario B — Mid-unit fever and back pain: Stop transfusion, NS keep-open, vitals, notify, clerical recheck—treat as possible acute hemolytic until proven otherwise.
Scenario C — Hypertensive crackles after two RBC units: Think TACO; stop, sit upright, oxygen, notify for diuretic orders; plan slower future transfusions.
Scenario D — Identity: Unit label DOB differs by one digit from wristband. Do not hang—return to blood bank and resolve discrepancy.
High-yield exam traps (blood products)
- Skipping two-nurse verification or hanging despite identifier mismatch
- Completing RBCs over >4 hours
- Using LR or D5 with blood
- Treating reaction by “slowing a little” without stopping when hemolysis or severe symptoms are possible
- Confusing TACO (overload) with TRALI (lung injury)
- Transfusing PRBCs for volume expansion alone when crystalloid/colloid strategy is intended
- Drawing type-and-screen from a contaminated line or mislabeled tube
- Restarting a unit after anaphylaxis or clear hemolytic signs without blood bank clearance
Which fluid is the standard compatible solution to keep the IV line open with a blood component transfusion?
A patient develops fever, flank pain, and hypotension 10 minutes after packed RBCs begin. What is the priority sequence?
Which pairing of blood product and primary high-level indication is correct?
Which statement best distinguishes TACO from TRALI for exam purposes?