# A nurse is preparing a client for a lumbar puncture (LP) to rule out meningitis. Which assessment finding would be most important for the nurse to report to the healthcare provider before the procedure?

> source: MyMerci (mymerci.kr)  
> url: https://mymerci.kr/pages/nclex_q.php?qn_id=541091  
> language: ko  
> subject: Adult Health

## 문제

A nurse is preparing a client for a lumbar puncture (LP) to rule out meningitis. Which assessment finding would be most important for the nurse to report to the healthcare provider before the procedure?

## 보기

1. Temperature of 101.2°F (38.4°C) with chills
2. Complaint of severe headache rated 9/10 with photophobia
3. Presence of papilledema on fundoscopic examination **✔ 정답**
4. Kernig's sign positive with nuchal rigidity

**정답: 3**

## 해설

Papilledema indicates increased intracranial pressure, which is a contraindication for lumbar puncture due to risk of brain herniation. Other findings like fever, headache, or Kernig's sign are expected in meningitis but do not preclude the procedure.

## 심화 해설

Key Clinical Concept: Identifying Contraindications Before Lumbar Puncture

The most critical assessment finding to report before a lumbar puncture (LP) is the presence of papilledema on fundoscopic examination. While fever, headache, photophobia, and positive meningeal signs strongly suggest meningitis, they represent the expected clinical picture that necessitates the diagnostic procedure. In contrast, papilledema is a clinical marker of increased intracranial pressure (ICP), which is a major risk factor for a catastrophic complication following LP: cerebral herniation.

Pathophysiology and Risk of Herniation

In a patient with significantly elevated ICP, the cranial compartment is under high pressure. A lumbar puncture creates a sudden decompression in the spinal compartment by removing cerebrospinal fluid (CSF). This action generates a dangerous pressure gradient between the cranial and spinal compartments, which can force brain tissue downward through the foramen magnum, causing brainstem compression and herniation [3]. The presence of papilledema, which is optic disc swelling visible via fundoscopy, is a direct clinical sign of this elevated ICP. Although a CT scan is a more definitive tool for identifying structural causes of increased ICP, such as a mass effect or obliterated cisterns, papilledema serves as a critical bedside warning sign that the patient is at high risk [2].

Analysis of Assessment Findings

-   Option 1 (Temperature of 101.2°F (38.4°C) with chills): This is an expected systemic sign of infection and inflammation, consistent with a diagnosis of meningitis. It supports the need for an LP to obtain CSF for analysis but is not a contraindication to the procedure itself.

-   Option 2 (Severe headache 9/10 with photophobia): These are classic symptoms of meningeal irritation. While distressing for the patient, they are part of the clinical syndrome of meningitis and do not independently predict a risk of herniation from the LP.

-   Option 3 (Presence of papilledema on fundoscopic examination): This is the correct answer. Papilledema is a hallmark sign of increased ICP. Its presence signals that the pressure equilibrium between cranial compartments may be unequal, predisposing the patient to herniation following spinal decompression via LP [2]. This finding must be urgently reported so the provider can consider neuroimaging (e.g., CT scan) before proceeding with the LP to assess for contraindications like a mass effect or midline shift [2, 4].

-   Option 4 (Kernig's sign positive with nuchal rigidity): These are physical exam findings indicative of meningeal inflammation and irritation. They are classic signs used to support the clinical diagnosis of meningitis but do not represent a contraindication to performing the diagnostic LP.

Clinical Decision-Making and Guidelines

The nurse’s priority is to recognize that papilledema is not merely another symptom of meningitis but a potential indicator of a complication that makes the standard diagnostic procedure dangerous. Consensus guidelines and clinical evidence emphasize that the risk of LP-induced herniation, which accounts for a significant portion of mortality in acute bacterial meningitis, is linked to pre-existing unequal intracranial pressures [2, 3]. Identifying papilledema allows the clinical team to weigh the risks and benefits, potentially opting for a head CT scan first to rule out structural abnormalities like obliterated cisterns or a lateral shift of midline structures, which are more precise predictors of herniation risk [2, 4].References (research sources)

- [2]Contraindications to lumbar puncture as defined by computed cranial tomography.Research articleDavid J. Gower, Alfred L. Baker, William O. Bell, Marshall R. Ball (1987) · DOI: 10.1136/jnnp.50.8.1071

- [3]Lumbar Puncture and Brain Herniation in Acute Bacterial Meningitis: A ReviewResearch articleAri R. Joffe (2007) · DOI: 10.1177/0885066607299516

## 임상 시나리오

LP Contraindication: PapilledemaRecognizing Increased ICP Before the Procedure
Before a lumbar puncture, a fundoscopic exam is essential. The presence of papilledema is a bedside marker of increased intracranial pressure (ICP) and a major contraindication.

Performing an LP in a patient with elevated ICP creates a pressure gradient, risking cerebral herniation through the foramen magnum. This is a catastrophic, often fatal, complication.

CautionExpected meningitis findings like fever, headache, and nuchal rigidity are not contraindications. The procedure is indicated for these patients. Report papilledema immediately and prepare for a CT scan prior to the LP.

## 핵심 개념

- **Papilledema** — Swelling of the optic disc due to increased intracranial pressure, visible as blurred disc margins on fundoscopic exam.
- **Brain Herniation** — A catastrophic event where increased pressure gradient forces brain tissue downward through the foramen magnum, often fatal.
- **Lumbar Puncture (LP)** — A procedure inserting a needle into the lumbar subarachnoid space to collect cerebrospinal fluid for diagnostic testing.
- **Intracranial Pressure (ICP)** — The pressure inside the skull exerted by brain tissue, blood, and cerebrospinal fluid; elevation can be life-threatening.
- **Fundoscopic Examination** — An assessment using an ophthalmoscope to visualize the retina and optic disc, critical for detecting papilledema.

## 같은 주제 문제

- [A nurse is preparing a client for a lumbar puncture. Which assessment finding would be mos…](https://mymerci.kr/pages/nclex_q.php?qn_id=541092)
- [A nurse is preparing a client for a lumbar puncture. Which nursing intervention is most ap…](https://mymerci.kr/pages/nclex_q.php?qn_id=541093)
- [A 44-year-old client with suspected meningitis is scheduled for a lumbar puncture to analy…](https://mymerci.kr/pages/nclex_q.php?qn_id=541094)
- [A nurse is preparing a patient for a lumbar puncture. Which nursing intervention should be…](https://mymerci.kr/pages/nclex_q.php?qn_id=541095)

---

More free questions: [기출문제](https://mymerci.kr/)

_학습 참고용입니다. 실제 임상은 최신 지침과 소속 기관 프로토콜을 따르세요._