# Stage 6 — Evaluate outcomes. Review the respiratory, infusion-site, and anticoagulation trends and answer the three outcome questions.

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=372866&lang=en  
> language: en  
> subject: Adverse Effects/Contraindications/Interactions  
> category: PPT

## Question

Stage 6 — Evaluate outcomes. Review the respiratory, infusion-site, and anticoagulation trends and answer the three outcome questions.

| Time | Data |
| --- | --- |
| 0630 — Hazards recognized | RR 10 and shallow, SpO2 92 percent on 2 L/min, arousal only to firm voice, and family PCA activation during sleep. A central-line-only 400 mEq/L potassium bag is running through a painful peripheral site. Last aPTT 92 seconds; no overt bleeding. |
| 0640 — Respiratory escalation | PCA remains stopped. Despite stimulation, repositioning, oxygen, and airway support, RR falls to 8/min and end-tidal carbon dioxide is 58 mm Hg. Protocol-directed titrated IV naloxone is administered while ventilation support continues. |
| 0700 to 0800 — Early response | RR 14/min, end-tidal carbon dioxide 43 mm Hg, and arousal to voice. Potassium infusion has been stopped; mild site swelling and erythema are managed under policy. Potassium is 3.6 mEq/L. The 0800 aPTT is 108 seconds without overt bleeding. |
| 1400 — Medication feedback loops | After the exact hospital-nomogram hold and rate reduction, aPTT is 76 seconds. The IV-site swelling has not progressed and neurovascular findings remain intact. No additional potassium is prescribed. Respiratory status remains stable under continued monitoring. |
| 1500 — Prevention and handoff | Mr. T and his family accurately teach back patient-only PCA use and when to call staff. The clinical response and safety events are documented and reported. Handoff includes recurrence monitoring, heparin rate and next laboratory time, and IV-site reassessment. |

Q1. Which evaluation best describes the respiratory response?

Naloxone use proves that the initial nursing response failed
Ventilation and responsiveness improved after protocol-directed rescue, but continued monitoring is required because opioid effects can outlast naloxone
One improved respiratory rate permanently excludes recurrent opioid toxicity

Q2. Which interpretation of the heparin trend is most accurate?

The heparin should be increased above the target to protect the stent
All antithrombotic therapy should remain stopped because the 0800 aPTT was 108 seconds
The case-specific nomogram action followed by an aPTT of 76 seconds without bleeding supports an effective feedback loop

Q3. Which result best supports safe management of the potassium infusion?

The painful central-only concentration was stopped, the site and potassium were reassessed, and the same bag was not restarted through another peripheral vein
The remaining bag was infused rapidly so none of the prescribed potassium was wasted
Burning was accepted as an expected effect because potassium must always be completed

## Explanation

Trend interpretation
Persistent respirations of 8/min and end-tidal carbon dioxide 58 mm Hg after initial support justified protocol-directed titrated naloxone; improvement requires continued surveillance because naloxone can wear off before morphine. Stopping the painful 400 mEq/L peripheral potassium infusion and reassessing the site and potassium prevented further exposure. The 108-to-76-second aPTT trend after the case-specific nomogram action supports appropriate heparin management without bleeding. Patient and family teach-back and safety reporting address recurrence.

## In-depth explanation

Respiratory outcome
Evaluate respiratory rate and depth, responsiveness, ventilation data, and recurrence—not whether naloxone was avoided. Continued monitoring is needed after improvement because opioid effects may outlast reversal.

Potassium outcome
A nonprogressing site and potassium 3.6 after stopping the infusion support the decision not to restart the same concentrated bag peripherally. The remaining dose is a new clinical decision, not an obligation to empty the bag.

Heparin outcome
The current valid aPTT, bleeding assessment, actual nomogram action, and follow-up result form one loop. A result returning to the stated target without bleeding supports the response.

System outcome
Teach-back, patient-only access, clinical documentation, safety reporting, concentrated-electrolyte route controls, and nomogram adherence are stronger than calling the episode harmless because the client improved.

## Clinical scenario

Scenario (Stage 6 — Evaluate outcomes)
The client improves after ventilation support and naloxone, the painful potassium infusion is discontinued, and the heparin result returns to target after protocol action.

Clinical judgment target
Evaluate sustained recovery and each medication-specific feedback loop without using avoidance of treatment as the success measure.

## Key concepts

- **Renarcotization** — Recurrence of opioid toxicity after an initial naloxone response when the opioid effect lasts longer than the antagonist, requiring continued assessment and sometimes repeat treatment.
- **Medication feedback loop** — Assess, intervene according to the medication-specific order or protocol, remeasure the target outcome, evaluate harm, and hand off remaining risk.
- **Outcome-based safety evaluation** — Judge success by sustained ventilation, prevention of tissue injury, safe coagulation control, understanding, and recurrence prevention rather than by uninterrupted infusion or absence of rescue medication.

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