Stroke
Stroke is defined as a sudden global or focal neurological deficit resulting from spontaneous hemorrhage or infarction of the CNS with objective evidence of infarction/hemorrhage irrespective of duration of clinical symptoms.
TIA (Transient Ischemic Attack) as a transient episode of neurological dysfunction caused by focal brain, spinal cord, or retinal ischemia, without acute infarction.
Ref. AHA/ASA 2009
Stroke แบ่งเป็น 2 ประเภท
- Ischemic stroke
- Atherosclerosis
- Cardioembolic
- Hemorrhagic stroke
Acute ischemic stroke ประกอบด้วย สาเหตุใหญ่ๆ 5 อย่าง
ตาม TOAST Classification (Trail of Org 10172 in Acute Stroke treatment)
- Large-artery atherosclerosis (Acute thrombosis / Embolus) ; 52%
- Small vessel occlusion (Lacunar infarction) จาก DM ; 23%
- Cardioembolism จาก AF , Valve ; 22%
- Stroke of other determined etiology
- Hypercoagulable disorder
- Venous sinus thrombosis
- Vasculitis
- Stroke of undetermined etiology (มีมากกว่า 2 สาเหตุ)
Common symptoms of acute ischemic stroke
- Abrupt onset of hemiparesis, monoparesis, quadriparesis
- Hemisensory deficits
- Visual field deficits
- Diplopia
- Dysarthria
- Facial droop
- Ataxia
- Vertigo
- Aphasia
- Sudden decrease in the level of consciousness
Treatment
- Acute care (door to rTP 4 hr 30 min )
- Thrombolysis therapy
-
0.9 mg/kg (maximum 90 mg) IV drip in 60 min,
แบ่งให้ 10% ___ IV load in 1 min
-
Control BP < 185/110 mmHg
-
Measure BP and neuro exam
q 15 min after rt-PA for 2 hr,
q 30 min for 6 hr then hourly until 24 hr
-
Follow-up CT or MRI scan at 24 hr after rt-PA
- แพ้ rTPA
- A-B-C-D
- Discontinue IV rt-PA
- Methylprednisolone 125 mg IV stat
- diphenhydramine 50 mg IV statRanitidine 50 mg IV (or famotidine 20 mg IV)If there is further increase in angioedema, --> Epinephrine (0.1%) 0.3 mL SC
- bleeding หลังได้ rTPA
- Stop alteplase infusion
- CBC, PT, INR, aPTT,
- Fibrinogen level,
- Type and cross-match
- CT brain NC Emer
- Cryoprecipitate 10 U IV drip in 10 – 30 min ให้ซ้ำหาก fibrinogen level of <200 mg/dL
- Transmine (Tranexamic acid) 1000 mg IV drip 10 min
- Hematology and neurosurgery consultations
- Aspirin 160-300 mg/day PO 1x1 pc
or ASA plus Clopidogrel 21 days
or Clopidogrel alone to 90 days
- High intensity statin (Atorvastatin 40-80 mg, Rosuvastatin 20 mg)
- Admit stroke unit
- Keep SpO2 ≥ 94%
- Isotonic iv solution
- BP management:
- rt-PA (180/105 mmHg)
- non rt-PA (220/120 mmHg)
- Start antihypertensive drug if neurological symptom stable
- Blood sugar : 140-180 mg/dl
- Cardiac monitoring 24 hr for AF screening
- Dysphagia screening
- Enteral diet within 7 days, NG tube feeding in patient with dysphagia
- Oral hygiene protocol
- Depression screening
- DVT prevention:
- early mobilization, intermittent pneumatic compression(IPC)
- Cerebral edema
- Osmotic therapy
- Mannitol 1.0 g/kg bolus then 0.5 g/kg every 4 - 6 hr
- Hypertonic saline (0.686 mL/kg of 23.4% saline)
- Glycerol IV 0.5-1gm/kg
- Decompressive craniectomy
- Large MCA infarction
- Large cerebellar infarction
- Seizure: No AED prophylaxis
- Non-cardioembolic stroke or TIA
- Antiplatelet agent recommendations:
- Aspirin (50–325 mg/d) 1x1 po pd (monotherapy)
- or Clopidogrel (75 mg) 1 x1 po pc
- or Aspirin plus clopidogrel within 24 hours of a minor ischemic stroke or TIA and continue for 90 days
- Cardioembolic stroke (AF, Cardiomyopathy, LV thrombus)
- Oral anticoagulants (OACs)
- Warfarin
- New oral anticoagulants (NOACs) in nonvalvular AF
======[Exclusion Criteria]======
- NIHSS score ≥ 25 (Sever stroke)
- Risk factor management
- Rehabilitation
- Recent MI in past 3 mo:
IV rt-PA is reasonable in non-STEMI
IV rt-PA is reasonable in STEMI (right, inferior, left anterior wall)