Blood Pressure, Glucose, Temperature, and Swallowing Management
Key Takeaways
Blood pressure targets depend on stroke type and reperfusion status: ischemic non-tPA permissive hypertension (treat only if >220/120), tPA candidate <185/110 before and <180/105 for 24 hours after, ICH target SBP ~140 (range 130-150).
Aggressive normalization is avoided in acute ischemic stroke because penumbral perfusion is pressure-dependent; intensive lowering below 140 is not recommended even after reperfusion.
Glucose should stay roughly 140-180 mg/dL, avoiding both hyperglycemia and hypoglycemia; check glucose during any acute neurologic change because hypoglycemia mimics stroke.
Fever worsens injured brain; target normothermia with nurse-initiated antipyretics and evaluate for infection rather than inducing hypothermia in normothermic patients.
No oral intake, including pills and water, until a validated dysphagia screen is passed or speech-language pathology clears the patient, because silent aspiration is common.
Supportive care is not routine care
Blood pressure, glucose, temperature, and swallowing are bedside variables that change neurologic outcome. The SCRN exam expects nurses to distinguish a number that requires protocol-driven action from a number that should not be overcorrected. The safest answer uses context: ischemic versus hemorrhagic stroke, reperfusion-therapy status, symptoms, orders, and unit protocol.
Blood pressure by context
The single highest-yield table in this chapter ties a blood pressure decision to the stroke pathway. Memorize these AHA/ASA thresholds.
| Situation | Target / threshold | Nursing reasoning |
|---|---|---|
| Acute ischemic stroke, no reperfusion therapy | Permissive hypertension; treat only if >220/120 mm Hg (lower ~15% in first 24 h) | Penumbral perfusion is pressure-dependent; aggressive lowering can extend infarct |
| Candidate for IV thrombolysis | Must be <185/110 mm Hg before treatment | Higher pressure raises hemorrhage risk; lower with labetalol or nicardipine first |
| After thrombolysis or thrombectomy | Maintain <180/105 mm Hg for at least 24 h | Reperfused tissue bleeds easily; frequent checks, avoid both extremes |
| Intracerebral hemorrhage (SBP 150-220) | Target SBP ~140 (range 130-150); avoid <130 | Smooth control limits hematoma expansion; over-lowering is potentially harmful |
| Aneurysmal SAH before securement | Control severe hypertension and pain; avoid hypotension | Balance rebleeding prevention against perfusion |
Do not chase a normal outpatient blood pressure in the first hours of ischemic stroke. In contrast, an ICH patient with escalating systolic pressure needs prompt protocol treatment and provider communication. When the stem pairs a BP change with headache, vomiting, decreased consciousness, or new deficit, treat the neuro change as the priority and escalate.
Glucose and temperature
Hypoglycemia can mimic stroke and worsen brain injury, so glucose is checked during any acute neurologic change before deterioration is assumed to be stroke progression alone. Hyperglycemia after stroke is associated with worse outcomes and hemorrhagic transformation, so inpatient protocols commonly target roughly 140-180 mg/dL while avoiding lows. The AHA/ASA recommends treating hypoglycemia (glucose <60 mg/dL) promptly and maintaining glucose in the 140-180 range.
Temperature matters because fever increases the metabolic demand of injured brain tissue and is linked to worse outcomes. Current AHA/ASA guidance supports targeting normothermia in hyperthermic patients, including nurse-initiated antipyretic protocols (for example, acetaminophen) and evaluating causes such as aspiration pneumonia, urinary infection, line infection, drug reaction, or central fever. Therapeutic (induced) hypothermia is not routine for normothermic ischemic stroke patients and is not a substitute for treating the source of fever.
Swallowing and aspiration prevention
Dysphagia is common after stroke and aspiration may be silent. The rule is strict: no oral intake, including pills, water, or food, until the patient passes a validated swallow screen or receives a speech-language pathology (SLP) evaluation. Facial droop is not the only clue. Brainstem stroke, reduced alertness, dysarthria, a weak or wet cough, a wet or gurgly voice, drooling, and prior aspiration pneumonia all raise concern.
If the screen is failed or cannot be completed, keep the patient NPO, notify the provider, request SLP evaluation, provide oral care, maintain aspiration precautions (upright positioning, suction available), and use ordered nonoral routes for medications and nutrition. Do not thicken liquids independently; the wrong texture can still be unsafe and must match a clinician's recommendation.
Agents, routes, and monitoring cadence
The preferred IV antihypertensives in acute stroke are labetalol (a beta/alpha blocker, given as intermittent boluses) and nicardipine or clevidipine (calcium-channel blockers titrated as continuous infusions) because they lower pressure smoothly and predictably; hydralazine is an alternative. Avoid abrupt, deep drops, which can extend an ischemic penumbra or drop perfusion in a watershed zone.
After thrombolysis, blood pressure is checked on the same intensified schedule as the neuro exam (every 15 minutes for 2 hours, then every 30 minutes for 6 hours, then hourly to 24 hours); any reading at or above 180/105 triggers treatment and notification. For ICH, a nicardipine infusion is commonly used to hold SBP near 140 with minimal variability, because swings in pressure correlate with hematoma growth.
Glucose and temperature follow their own surveillance logic. Check glucose on admission and with any neuro change, treat values under 60 mg/dL promptly, and use insulin protocols (often a sliding scale or infusion) to keep glucose roughly 140-180 mg/dL without causing hypoglycemia, which itself harms neurons. For temperature, identify and treat the source while giving scheduled antipyretics to maintain normothermia; a persistent fever despite a negative workup may be central, but infection must be excluded first.
Nursing priorities in mixed scenarios
SCRN stems often combine variables, and the right answer protects brain, airway, and treatment eligibility.
- Glucose 52 mg/dL with new weakness: treat the hypoglycemia and reassess; do not assume stroke progression.
- Post-thrombolysis with BP 192/108: treat per protocol to keep BP <180/105 and run close neuro checks, because reperfused tissue bleeds easily.
- Ischemic stroke, no tPA, BP 196/104, exam unchanged: do not aggressively lower, because the threshold for treatment without reperfusion is >220/120 and perfusion is pressure-dependent.
- Fever 38.9 deg C with productive cough and a failed swallow screen: treat fever toward normothermia, evaluate for aspiration pneumonia, and keep the patient NPO with SLP referral.
The exam answer should verify the value, recognize the context, act through protocol, and communicate the change. Routine meal trays, oral pills, ambulation, or comfort measures are unsafe when physiology or swallowing status is not yet controlled.
A patient with acute ischemic stroke did NOT receive reperfusion therapy. Blood pressure is 198/106 mm Hg and the neurologic exam is unchanged. What is the best nursing interpretation?
Treat the blood pressure aggressively to reach a normal outpatient value immediately
This is within permissive hypertension; do not lower aggressively because treatment without reperfusion is generally reserved for pressures above 220/120 mm Hg
Lay the patient flat and give a rapid IV bolus of antihypertensive medication
Withhold all stroke medications until the pressure is below 120/80 mm Hg
A stroke patient suddenly becomes confused and weaker during morning care. Which bedside value should be checked immediately because it can mimic or worsen neurologic deficits?
Point-of-care blood glucose
Serum cholesterol
Urine specific gravity
Hemoglobin A1c
A newly admitted stroke patient has not completed a swallow screen. The family asks whether they can give the patient home medications with water. What should the nurse do?
Allow small sips of water since pills are not solid food
Crush the pills and mix them into applesauce at the bedside
Allow oral medications only if the patient has no facial droop
Keep the patient NPO, explain aspiration risk, and arrange a swallow screen or SLP evaluation before any oral intake
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