# A nurse is caring for a 45-year-old patient with suspected increased intracranial pressure (ICP) after a traumatic brain injury from a motor vehicle accident 6 hours ago. Which assessment finding should be the nurse's highest priority for immediate intervention?

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## 문제

A nurse is caring for a 45-year-old patient with suspected increased intracranial pressure (ICP) after a traumatic brain injury from a motor vehicle accident 6 hours ago. Which assessment finding should be the nurse's highest priority for immediate intervention?

The nurse is monitoring a 45-year-old patient who sustained a traumatic brain injury in a motor vehicle accident 6 hours ago.

## 보기

1. Blood pressure 160/90 mmHg with bradycardia at 52 bpm
2. Glasgow Coma Scale score decreased from 12 to 10 over the past 2 hours
3. Unequal pupils with sluggish light response
4. Irregular breathing pattern with periods of apnea **✔ 정답**

**정답: 4**

## 해설

Irregular breathing with apnea indicates brainstem compression and impending herniation, a life-threatening emergency requiring immediate intervention. Other findings (Cushing's triad, GCS decrease, pupil changes) are concerning but less urgent.

## 심화 해설

Clinical Reasoning and Priority Setting in Increased Intracranial Pressure

The question asks for the highest priority assessment finding requiring immediate intervention in a patient with suspected increased intracranial pressure (ICP) following traumatic brain injury (TBI). To determine this, we apply the ABC (Airway, Breathing, Circulation) priority-setting framework, a cornerstone of NCLEX-RN clinical judgment. While all options represent signs of neurological deterioration, the one that directly threatens the patient's airway and breathing takes precedence.

Analysis of Options Using the ABC Framework

**Option 1: Blood pressure 160/90 mmHg with bradycardia at 52 bpm**

This combination is highly suggestive of Cushing's triad, a late and ominous sign of severely elevated ICP. The mechanism involves brainstem compression triggering a systemic ischemic response: systolic hypertension develops to overcome the high ICP and perfuse the brain, and baroreceptor activation leads to reflex bradycardia [1,4]. While this finding indicates a critical state, it is a circulatory ("C") compensatory response. The nurse must urgently report this, but a primary breathing problem ("B") is more immediately life-threatening.

**Option 2: Glasgow Coma Scale score decreased from 12 to 10 over the past 2 hours**

A decrease of 2 points on the Glasgow Coma Scale (GCS) is a significant neurological deterioration and a hallmark of rising ICP, reflecting progressive brain dysfunction [1,4]. This finding necessitates prompt notification of the provider and a CT scan. However, it represents a "D" (Disability) problem in the primary survey. The priority is to first ensure a patent airway and adequate breathing, as hypoxia and hypercapnia are potent cerebral vasodilators that will further elevate ICP.

**Option 3: Unequal pupils with sluggish light response**

This finding indicates compression of the oculomotor nerve (CN III), often due to uncal herniation from a lateralized mass effect [4]. It is a critical, localizing sign of high ICP. Like the GCS drop, this is a "D" (Disability) problem. While it demands immediate neurosurgeon evaluation, the physiological threat of apnea and respiratory arrest is more acute and must be stabilized first.

**Option 4: Irregular breathing pattern with periods of apnea**

This is the correct answer. Irregular respirations, including Cheyne-Stokes or ataxic (Biot's) breathing with apneic spells, signal direct compression or dysfunction of the brainstem respiratory centers [1,4]. This is a primary Breathing ("B") problem. Apnea leads to immediate hypoxia and hypercapnia. Hypercapnia causes profound cerebral vasodilation, which dramatically increases cerebral blood volume and can precipitate a fatal ICP crisis [1]. This finding indicates that the patient's ability to maintain a patent airway and spontaneous ventilation is failing, making it the highest priority for immediate intervention, such as preparing for intubation and mechanical ventilation to control PaCO₂. The concept of cerebrovascular autoregulation, often impaired in severe TBI, makes the brain exquisitely vulnerable to these blood gas derangements [1].References (research sources)

- [1]Cerebrovascular Autoregulation Monitoring in the Management of Adult Severe Traumatic Brain Injury: A Delphi Consensus of CliniciansGuidelineBart Depreitere, Giuseppe Citerio, Martin Smith, P. David Adelson, Marcel Aries, Thomas P. Bleck (2021) · DOI: 10.1007/s12028-020-01185-x

- [4]Clinical Trials in Head InjuryRCT/clinical trialRaj K. Narayan, Mary Ellen Michel, Beth Ansell, A. Baethmann, Anat Biegon, Michael B. Bracken (2002) · DOI: 10.1089/089771502753754037

## 임상 시나리오

Prioritizing Interventions for Increased ICPApplying the ABC Framework to Neurological Deterioration
When a patient with a traumatic brain injury shows signs of increased ICP, always apply the ABC (Airway, Breathing, Circulation) framework to set priorities. A change in breathing pattern, such as irregular respirations with periods of apnea, signals direct brainstem compression and is an immediate threat to life.

Other critical signs like Cushing's triad (hypertension, bradycardia, and irregular respirations) and pupillary changes (unequal, sluggish) indicate late-stage ICP and impending herniation. While these require urgent reporting, they are addressed only after the airway and breathing are secured.

CautionA GCS drop of 2 points or more is a significant neurological emergency. However, do not let it distract you from a simultaneous airway or breathing crisis. Prepare for immediate airway management and notify the provider while continuing to assess.

## 핵심 개념

- **Cushing's Triad** — A late sign of increased intracranial pressure characterized by systolic hypertension, bradycardia, and irregular respirations.
- **ABC Priority Framework** — A clinical decision-making tool that prioritizes interventions based on Airway, Breathing, and Circulation in that order.
- **Cheyne-Stokes Respiration** — An abnormal pattern of breathing characterized by progressively deeper and sometimes faster breathing, followed by a gradual decrease that results in a temporary stop in breathing called an apnea.
- **Glasgow Coma Scale** — A neurological scale used to assess a person's level of consciousness after a brain injury, scoring eye, verbal, and motor responses.
- **Brainstem Compression** — Pressure on the brainstem, often from herniation due to increased ICP, which disrupts vital autonomic functions like breathing and heart rate.

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