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Put any two — or three — conditions side by side, adult or pediatric, to spot the look-alike differences fast, row by row.

Intracranial Hemorrhage

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In one line

·Bleeding inside the skull can happen in four spaces—inside brain tissue (intracerebral), around the surface of the brain (subarachnoid), between the brain and the dura (subdural), or between the dura and the skull (epidural)—and where the blood lands tells you what broke and what to do.

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Normal physiology

·The skull is a rigid bony box that holds the brain, blood in vessels, and cerebrospinal fluid (the clear liquid cushion around the brain). These three—brain tissue, blood, and fluid—balance perfectly inside a fixed space, like three passengers in a car with no extra seats. The Monro-Kellie doctrine says that because the skull cannot expand, if one part grows (like a puddle of blood), the others must shrink or pressure rises and crushes the brain.

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What goes wrong

·A blood vessel inside or around the brain bursts, and blood spills into a space where it does not belong—either into brain tissue, the fluid cushion around the brain, the gap under the dura, or the thin space above the dura next to the skull.

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Hallmark signs

·Sudden, severe headache (often called 'the worst headache of my life')
·Nausea and vomiting
·Confusion or trouble staying awake
·Weakness or numbness on one side of the body
·Slurred speech or trouble understanding words
·Seizure
·Stiff neck and pain when bending the head forward
·Vision changes—blurry vision, double vision, or loss of part of the visual field

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Red flags · escalate now

·Sudden, thunderclap headache—the worst headache of your life, peaking in seconds
·Fainting or collapsing, especially right after the headache starts
·Rapidly worsening confusion, sleepiness, or inability to wake someone up
·New weakness, numbness, or paralysis on one side of the face or body
·Seizure in someone with no prior seizure history

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Workup

·Non-contrast head CT
·Complete blood count (CBC)
·Prothrombin time (PT/INR) and activated partial thromboplastin time (aPTT)
·Basic metabolic panel (BMP) with creatinine
·CT angiography (CTA) of the head
·Lumbar puncture (LP) with opening pressure and cerebrospinal fluid (CSF) analysis
·Repeat non-contrast head CT at 6–24 hours

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Treatment

·Reverse anticoagulation immediately: vitamin K 10 mg IV + prothrombin complex concentrate (PCC) 25–50 units/kg, or fresh frozen plasma (FFP) if PCC unavailable, for warfarin; idarucizumab 5 g IV for dabigatran; andexanet alfa for apixaban/rivaroxaban
·Lower systolic blood pressure to 130–150 mmHg within 1 hour using IV nicardipine (5–15 mg/hr) or labetalol (10–20 mg IV bolus, then infusion)
·Neurosurgery consult within 1 hour: consider craniotomy for a pooled collection of blood (hematoma) evacuation (> 30 mL lobar, cerebellar > 3 cm with brainstem compression), external ventricular drain (EVD) for hydrocephalus, aneurysm clipping or coiling, or AVM resection
·Manage intracranial pressure: elevate head of bed 30°, keep head midline, osmotic therapy with mannitol 0.25–1 g/kg IV or 3% hypertonic saline 150–250 mL bolus if signs of herniation, avoid low oxygen (hypoxia) (keep SpO₂ ≥ 94%) and hypercarbia (keep CO₂ 35–40 mmHg)
·Preventive (Prophylactic) antiseizure medication — levetiracetam 500–1000 mg IV twice daily — for lobar bleeding (hemorrhage), cortical involvement, or early seizure
·Transfuse packed red blood cells if hemoglobin < 7 g/dL, platelets if count < 50,000/µL and active bleeding or planned surgery
·Serial neurologic exams every 1–2 hours and repeat imaging at 6–24 hours or sooner if exam worsens

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NCLEX trap

·A sudden, severe headache in intracranial bleeding (hemorrhage) is a medical emergency. You get a CT scan first to see where the blood is, then call the surgeon. Pain medicine comes after you know what you are treating. Masking symptoms with pain meds delays the diagnosis and can let the bleed get worse.
·A stiff neck can be intracranial bleeding (hemorrhage) — especially subarachnoid bleeding, where blood spills into the space around the brain and irritates the membranes. Get a CT scan first. Do not assume. The history (sudden 'thunderclap' headache) and other findings (no fever, sudden start) tell you which one it is.
·In intracranial bleeding (hemorrhage), brain swelling can happen fast. Watch the pupils and level of consciousness minute by minute. If the patient is getting sleepier or a pupil is getting bigger, the brain is being squeezed (herniation is starting) and you need to act now — do not wait. Early signs matter more than late ones.
·Reversing blood thinners stops more bleeding, but it does not fix the blood that already spilled. In intracranial bleeding (hemorrhage), you reverse blood thinners first (vitamin K and fresh frozen plasma for warfarin; prothrombin complex concentrate for DOACs), control blood pressure second, and then the surgeon decides if the blood needs to be drained or the vessel needs to be fixed.
·In intracranial bleeding (hemorrhage), you do not want blood pressure too high because it can make the bleeding worse. You control blood pressure by type — if the bleed is inside the brain (intracerebral), you bring systolic pressure down gently to under 140 mmHg. If the bleed is from an aneurysm (subarachnoid), you bring it down to stop it from bursting again, but not so low that the brain gets too little blood.
·The type of intracranial bleeding (hemorrhage) changes what you do. Epidural bleeds (from a skull fracture tearing the middle meningeal artery) may need fast surgery to drain blood before the brain herniates. Subdural bleeds in older people (from torn bridging veins) may need watching first if small. Intracerebral bleeds from high blood pressure need blood pressure control and reversal of anticoagulation. Subarachnoid bleeds from aneurysms need the aneurysm clipped or coiled to prevent rebleeding. Know the type before you treat.

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