Free SCRN Exam Questions That Helps Candidates Pass

Comprehensive and Detailed Explanation:

The correct answer is A because the internal carotid artery (ICA) supplies both the ophthalmic artery (which gives rise to retinal circulation, accounting for ipsilateral transient or permanent monocular visual loss or amaurosis fugax) and the anterior/middle cerebral arteries (supplying the contralateral hemisphere, which accounts for contralateral hemiparesis and aphasia). Option B is incorrect because the PICA supplies the lateral medulla and cerebellum, causing brainstem and cerebellar signs. Option C is incorrect because the basilar artery supplies the pons and brainstem structures. Option D is incorrect because the superior cerebellar artery supplies the superior cerebellum and midbrain. SCRN nurses master cerebral vascular anatomy to correlate complex ocular and neurological symptoms with proximal vascular lesions.

Comprehensive and Detailed Explanation:

The correct answer is A because the frontal eye fields (located in the posterior middle frontal gyrus) control voluntary horizontal gaze to the contralateral side. In an acute destructive hemispheric stroke such as an MCA stem occlusion, the balance of gaze control is disrupted, causing the eyes to deviate toward the side of the brain lesion (away from the hemiparesis). Option B is incorrect because the primary visual cortex processes visual input from the visual fields rather than initiating conjugate gaze movements. Option C is incorrect because Broca's area governs expressive language production. Option D is incorrect because Wernicke's area handles language comprehension. Understanding cortical functional localization allows SCRN nurses to accurately interpret acute physical exam findings and correlate them with specific vascular and structural brain injuries.

Comprehensive and Detailed Explanation:

The correct answer is A because patients presenting within the standard window for acute ischemic stroke who have disabling neurological deficits (such as an NIHSS score of 17) and no contraindications should receive intravenous (IV) thrombolysis (alteplase) as expeditiously as possible, alongside prompt evaluation for mechanical endovascular thrombectomy (EVT) if a large vessel occlusion is suspected or confirmed. Time is brain, and door-to-needle metrics dictate that thrombolytic therapy should not be delayed for advanced neuroimaging when a non-contrast CT has ruled out hemorrhage and the patient is clearly within the eligible timeframe. Option B is incorrect because waiting for MRI creates dangerous treatment delays that worsen clinical outcomes. Option C is incorrect because excessive blood pressure lowering in the hyperacute phase can exacerbate cerebral ischemia within the penumbra; current guidelines permit permissive hypertension up to specific high thresholds prior to reperfusion therapy. Option D is incorrect because prophylactic anticoagulation with therapeutic or low-molecular-weight heparin is contraindicated within the first 24 hours following intravenous thrombolysis due to the significantly elevated risk of secondary intracranial hemorrhage. SCRN nurses must master hyperacute triage workflows, rapid eligibility screening, and concurrent preparation for multi-modal reperfusion strategies to maximize functional recovery.

Comprehensive and Detailed Explanation:

The correct answer is A because alterations in the level of consciousness—ranging from mild lethargy and confusion to somnolence—are typically the earliest and most sensitive clinical indicators of rising intracranial pressure (ICP) and expanding cerebral edema. As pressure increases within the rigid cranial vault, cerebral perfusion and reticular activating system function are compromised. Option B is incorrect because peripheral edema is related to systemic fluid balance or venous stasis rather than intracranial pressure. Option C is incorrect because hearing loss is not a cardinal sign of elevated ICP. Option D is incorrect because generalized or focal motor changes occur, but isolated hyperactive reflexes are not the primary hallmark of ICP elevation. SCRN nurses perform frequent serial neurological assessments using the NIHSS and Glasgow Coma Scale to detect subtle trends indicating clinical deterioration.

Comprehensive and Detailed Explanation:

The correct answer is A because current clinical guidelines establish the standard therapeutic window for intravenous alteplase administration in acute ischemic stroke as up to 4.5 hours from the time the patient was last known to be normal. Because the patient presented at 3 hours and 30 minutes, they remain eligible for thrombolytic therapy, provided contraindications are absent. Option B is incorrect because restricting thrombolysis to 60 minutes is incorrect and contradicts major clinical trial data. Option C is incorrect because waiting 24 hours destroys salvageable penumbral tissue. Option D is incorrect because aspirin alone is insufficient acute reperfusion therapy for major ischemic strokes within the window. SCRN nurses must know time windows intimately to ensure eligible patients receive timely reperfusion.