# 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. Review the trend and select the best interpretation and next plan.

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=522661&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.

Review the trend and select the best interpretation and next plan.

| Time | Data |
| --- | --- |
| Reaction recognition | BP 82/48 mm Hg; HR 128/min; chills, low-back pain, and dark-red urine |
| After initial response | Transfusion stopped; new saline tubing and supportive care started; BP 98/60 mm Hg; HR 108/min |
| Current laboratory trend | Urine output 12 mL/hour; creatinine rising; LDH elevated; haptoglobin low; plasma and urine hemoglobin present |

Q1. How should the trend be interpreted?

The reaction has completely resolved
Hemolysis persists with evolving acute kidney-injury risk
The findings indicate only local IV irritation

Q2. Which next plan is appropriate?

Continue renal-perfusion support and serial urine, renal, and coagulation monitoring
Restart the red-cell unit because blood pressure improved
Wait for anuria before notifying the treatment team

## Explanation

Blood pressure has improved, but falling urine output, rising creatinine, elevated lactate dehydrogenase, low haptoglobin, and hemoglobinuria show ongoing intravascular hemolysis with kidney-injury risk. Renal perfusion, coagulation, and urine output require continued support and reassessment.

## In-depth explanation

Quick answer
Do not mistake partial hemodynamic recovery for resolution of hemolysis and renal risk.

Why this is correct
Free hemoglobin, shock, and possible disseminated coagulation can injure the kidneys even after the suspect component has been stopped.

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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