# Clinical context Twelve minutes after a red-blood-cell transfusion begins, a client develops sudden chills, severe low-back pain, chest tightness, hypotension, tachycardia, and dark-red urine, requiring an immediate response for a serious transfusion reaction with hemolysis and shock risk. For each finding, identify the transfusion-reaction pattern it most strongly supports.

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=522657&lang=en  
> language: en  
> subject: Adverse Effects/Contraindications/Interactions  
> category: PPT

## Question

Clinical context
Twelve minutes after a red-blood-cell transfusion begins, a client develops sudden chills, severe low-back pain, chest tightness, hypotension, tachycardia, and dark-red urine, requiring an immediate response for a serious transfusion reaction with hemolysis and shock risk.

For each finding, identify the transfusion-reaction pattern it most strongly supports.

|  | Acute hemolytic reaction | TACO | TRALI | Bacterial contamination |
| --- | --- | --- | --- | --- |
| Low-back pain, hemoglobinuria, and positive direct antiglobulin testing |  |  |  |  |
| Hypertension, jugular venous distention, crackles, and rapid fluid gain |  |  |  |  |
| New hypoxemia and bilateral infiltrates without circulatory overload |  |  |  |  |
| High fever, severe rigors, and matching organisms from patient and residual component |  |  |  |  |

## Explanation

Hemoglobinuria, back pain, and a positive direct antiglobulin test support acute hemolysis. Hypertension with jugular venous distention supports TACO, noncardiogenic hypoxemia supports TRALI, and marked fever with rigors and matching organism cultures supports bacterial contamination.

## In-depth explanation

Quick answer
Separate hemolysis, circulatory overload, lung injury, and bacterial contamination.

Why this is correct
Several reactions can cause dyspnea or hypotension. Pattern recognition uses the full cluster, timing, volume status, laboratory evidence, and product investigation rather than one symptom alone.

Easy analogy or mental picture
Treat every infusion as a controlled clinical system: verify the product and access, recognize a changing cue, stop preventable exposure, stabilize the client, and confirm the response.

Memory hook
Product, access, compatibility, infusion cue, protective action, and reassessment.

NCLEX decision rule
Choose the action that prevents the most immediate infusion-related harm while preserving vascular access and the ordered diagnostic evidence.

Why the other choices are wrong
Options that restart a suspect product, bypass a safety device, force an occluded tube, or delay reassessment can convert a reversible warning into serious harm.References
1CDC NHSN Hemovigilance Module Surveillance Protocol, January 2026Definitions and clinical patterns for acute hemolytic reaction, TACO, TRALI, and transfusion-transmitted infection
2CDC Clinical Guidance for Bacterial Contamination and Blood SafetyStop a suspected contaminated transfusion, preserve the unit, culture the patient, and investigate the residual component
3FDA-recognized Circular of Information for Blood and Blood ComponentsTransfusion reaction recognition, immediate discontinuation, product investigation, and supportive care

## Clinical scenario

Clinical context
Twelve minutes after a red-blood-cell transfusion begins, a client develops sudden chills, severe low-back pain, chest tightness, hypotension, tachycardia, and dark-red urine, requiring an immediate response for a serious transfusion reaction with hemolysis and shock risk.

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