# Stage 6 — Evaluate outcomes. Review the isolation, diagnostic, treatment, and exposure-follow-up timeline and answer the three outcome questions.

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=568118&lang=en  
> language: en  
> subject: Standard/Transmission-Based Precautions/Surgical Asepsis  
> category: SIPC

## Question

Stage 6 — Evaluate outcomes. Review the isolation, diagnostic, treatment, and exposure-follow-up timeline and answer the three outcome questions.

| Time | Data |
| --- | --- |
| 0700 — Recognition | Three-week cough with blood-streaked sputum, weight loss, night sweats, recent infectious TB contact, and a cavitary right-upper-lobe lesion are recognized after six hours in a non-AIIR room. |
| 0710 to 0810 — Containment | The client is masked, the door is closed, entry is limited, qualified personnel use fit-tested N95 or higher protection, and AIIR transfer is completed without another unprotected entry. |
| 1100 — Diagnostic and treatment response | First sputum is AFB-smear 3+ and NAAT-positive for M. tuberculosis complex. Culture and susceptibility testing are pending. The TB clinician starts an appropriate multidrug regimen after specimens are obtained. |
| 48 hours — Isolation review | Three specimens were collected 8 to 24 hours apart, including one early-morning specimen. Two smears are positive and the third is pending. Cough persists, and no alternative diagnosis explains the syndrome. |
| 48 hours — Exposure follow-up | The chemotherapy recipient and 3-year-old child receive prompt medical evaluation. Healthcare personnel receive symptom screens; previously negative personnel are tested now and scheduled for repeat testing 8 to 10 weeks after last exposure if the first test is negative. Prior-positive personnel receive symptom evaluation rather than automatic retesting. |

Q1. Which isolation evaluation is most accurate at 48 hours?

Airborne precautions can stop because treatment has begun
A single pending smear permits transfer back to a semiprivate room
Airborne precautions should continue because infectious pulmonary TB remains likely and positive-smear, symptom, and diagnostic criteria do not support discontinuation

Q2. Which finding best shows that healthcare-personnel follow-up is correctly structured?

Previously negative personnel have symptom evaluation and immediate testing, with repeat testing 8 to 10 weeks after last exposure if the first result is negative
Every employee receives preventive medication before symptoms and exposure intensity are assessed
Personnel with documented prior positive tests are automatically given serial IGRAs

Q3. Which interpretation of the diagnostic and treatment response is most accurate?

A positive NAAT replaces culture and susceptibility testing
Rapid smear and NAAT results support the working diagnosis and response, while culture and susceptibility testing remain necessary and treatment is coordinated with TB expertise
Clinical improvement alone identifies drug susceptibility and permits immediate regimen narrowing

## Explanation

Outcome evaluation
Airborne precautions must continue because the client remains symptomatic, two smears are positive, the third is pending, and no alternative diagnosis explains the syndrome. The investigation is appropriately risk-based when the immunocompromised roommate and young child receive prompt evaluation and healthcare-personnel follow-up reflects prior test history. For personnel with a prior negative test, an immediate test plus repeat testing 8 to 10 weeks after the last exposure if initially negative closes the testing window. NAAT supports rapid diagnosis but does not replace culture and susceptibility results needed for definitive regimen decisions.

## In-depth explanation

Isolation outcome
Do not use one improved assessment or a single preliminary result to end airborne precautions. Here, ongoing symptoms and positive smears make continuation clear.

Contact outcome
Effective follow-up is neither universal treatment nor no action. It prioritizes vulnerable and intensely exposed contacts and records who needs symptom evaluation, immediate testing, later testing, or additional medical evaluation.

Diagnostic and treatment outcome
NAA testing accelerates identification. Culture and drug-susceptibility testing remain essential, and treatment is coordinated with TB expertise and public health.

NCLEX rule
Evaluate whether exposure stopped, isolation remains indicated, diagnostics are complete, treatment is tolerated, and follow-up has dates and owners.

## Clinical scenario

Scenario (Stage 6 — Evaluate outcomes)
Forty-eight hours after recognition, the client remains in an AIIR on treatment while smear, culture, susceptibility, and contact follow-up continue.

## Key concepts

- **Window-period retesting** — Repeat IGRA or TST 8 to 10 weeks after the last exposure for an exposed person with a prior negative test whose immediate post-exposure test remains negative.
- **Prior-positive healthcare personnel** — Personnel with documented prior positive TB testing generally receive symptom evaluation after exposure rather than repeat infection testing, with further evaluation if symptoms or risk indicate.
- **Microbiologic completion** — Use smear and NAA for rapid information while completing culture, identification, susceptibility testing, and public-health coordination.

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