Scott Silvers, MD, FACEP Treating ED Ischemic Stroke Patients: NIHSS Approximation & Elevated BP Management.

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Presentation transcript:

Scott Silvers, MD, FACEP Treating ED Ischemic Stroke Patients: NIHSS Approximation & Elevated BP Management

Scott Silvers, MD, FACEP Scott Silvers, MD, FACEP Assistant Professor Co-Director Primary Stroke Center Department of Emergency Medicine Mayo Clinic College of Medicine Jacksonville, Florida

Scott Silvers, MD, FACEP Objectives Help improve stroke outcome Learn about stroke evaluation Know how to use protocols Provide rational therapy in the ED Improve disposition and documentation Improve Emergency Medicine practice

Scott Silvers, MD, FACEP Methods Discussion of critical questions Review of key learning points Review ED documentation

Scott Silvers, MD, FACEP A Clinical Case

Scott Silvers, MD, FACEP Clinical History A 62 year old female acutely developed aphasia and right sided weakness while in a store. The store clerk immediately called 911. Paramedics on the scene within 9 minutes, at 6:43 pm. She arrived in the ED at 7:05 pm… completed her head CT at 7:25 pm… and a neurology consult was obtained at 7:35 pm (approximately one hour after the onset of her symptoms).

Scott Silvers, MD, FACEP ED Presentation VS: 98 F, 90, 16, 116/63, 98% RA, Wt = 50 kg The patient appeared alert, and was able to slowly respond to simple commands. The patient had a patent airway, no carotid bruits, clear lungs, and a regular cardiac rate and rhythm. The pupils were midpoint and reactive, and there was neglect of the R visual field. There was facial weakness of the R mouth, and R upper and lower extremity motor paralysis. DTRs were 2/2 on the L and 0/2 on the R.

Scott Silvers, MD, FACEP Critical Questions How is the NIHSS used? How should BP be managed in acute ischemic stroke? What must be documented when considering tPA use in the ED?

Scott Silvers, MD, FACEP NIHSS Estimation: The Procedure

Scott Silvers, MD, FACEP NIHSS: Driving Principles NIHSS: anatomic neurologic examination Quantification directs therapies Helps to categorize patients –Low NIHSS, thrombolysis less indicated –Mid-range NIHSS, thrombolysis indicated –High NIHSS, thrombolysis less indicated NIHSS optimal for thrombolysis?

Scott Silvers, MD, FACEP NIHSS Estimation Perform a systematic neurological exam

Scott Silvers, MD, FACEP NIHSS Estimation Perform a systematic neurological exam Focus on four areas of deficit: –Unilateral motor deficit –Speech and language deficit –CN and visual field deficit / neglect –Depressed level of consciousness

Scott Silvers, MD, FACEP NIHSS Estimation Perform a systematic neurological exam Focus on four areas of deficit: –Unilateral motor deficit –Speech and language deficit –CN, neglect and visual field deficit –Depressed level of consciousness Grade/add: mild (2), mod (4), severe (8)

Scott Silvers, MD, FACEP NIH Stroke Scale 13 item scoring system, 7 minute exam Integrates neurologic exam components CN (visual), motor, sensory, cerebellar, inattention, language, LOC Maximum scale score is 42 Maximum ischemic stroke score is 31 Minimum score is 0, a normal exam Scores > 15-20: severe stroke

Scott Silvers, MD, FACEP NIHSS Composite CN (visual):8 Unilateral motor:8 LOC: 7 Language:5 Ataxia:2 Sensory:2 Inattention:2

Scott Silvers, MD, FACEP NIHSS & Outcome Does the baseline NIHSS predict outcome? Yes. Adams HP Neurology 1999;53: Baseline NIH Stroke Scale score strongly predicts outcome after stroke (TOAST)

Scott Silvers, MD, FACEP NIHSS Crude Estimate CN (visual):8 Unilateral motor:8 LOC: 8 Language:8 Mild 2, Moderate 4, Severe, 8 Incorporates other elements

Scott Silvers, MD, FACEP NIHSS & Outcome NIHSS < 12-14: 80% good, excellent outcome NIHSS > 20-26: < 20% good, excellent outcome Lacunar infarct patients: best outcomes. Adams HP Neurology 1999;53: Baseline NIH Stroke Scale score strongly predicts outcome after stroke (TOAST)

Scott Silvers, MD, FACEP Four Main NIHSS Areas CN/Visual:Facial, gaze palsy Visual field deficit Unilateral motor:Hemiparesis LOC: Depressed LOC, AMS Language:Aphasia, dysarthria 28 total points

Scott Silvers, MD, FACEP NIHSS ED Estimate CN/Vision/Neglect:8 Unilateral motor:8 LOC: 8 Language:8 Mild: 2, Moderate: 4, Severe: 8 +/- Incorporates other elements

Scott Silvers, MD, FACEP Case NIHSS Estimate CN/Vision/Neglect: R vision loss & neglect, no fixed gaze4 Unilateral motor: complete hemiparesis8 LOC: mild decrease in LOC2 Language:expressive aphasia4 Approx 18 points total Mod-severe stroke range, worse if MS impaired

Scott Silvers, MD, FACEP Elevated BP Therapy: The Procedure

Scott Silvers, MD, FACEP BP Rx: Key Principles Identify hypertensive emergency situation Be aware of chronic HTN, systolic HTN Use BP meds that can be titrated Goal BP < 185 / 110 Be more aggressive with ICH, elevated ICP Do not lower BP to a MAP < 110 mmHg Remember CPP = MAP- ICP

Scott Silvers, MD, FACEP First Things First: Verify BP Recheck the patient’s blood pressure Perform it yourself Measure after supine, arm rested Validate with a manual cuff Measure in both arms Recheck a second time after 10 minutes

Scott Silvers, MD, FACEP Elevated BP Rx Procedure Establish HTN emergency: BP 230/140

Scott Silvers, MD, FACEP Elevated BP Rx Procedure Establish HTN emergency: BP 230/140 IV bolus medications –Labetalol mg IVP –Hydralazine mg IVP –Enalapril IVP

Scott Silvers, MD, FACEP Elevated BP Rx Procedure Establish HTN emergency: BP 230/140 IV bolus medications –Labetalol mg IVP –Hydralazine mg IVP –Enalapril IVP Continuous IV infusions –Esmolol 500 µg IV load, 50 µg/kg/min –Nitroprusside µg/kg/min

Scott Silvers, MD, FACEP Elevated BP Rx Procedure Consider NTG in cardiac ischemia pts Calcium channel blockers also useful Goal CPP >70 mmHg, SBP > 90 mmHg If hypotensive, consider NS and pressors –Dopamine 2-20 µg/kg/min –Norepinephrine µg/kg/min –Phenylephrine 2-10 µg/kg/min

Scott Silvers, MD, FACEP ED Treatment and Patient Outcome

Scott Silvers, MD, FACEP Clinical Case: CT Result

Scott Silvers, MD, FACEP Clinical Case: ED Rx CT: no low density areas or bleed No contraindications to tPA, BP OK NIH stroke scale: approx Neurologist said OK to treat tPA administered, no complications

Scott Silvers, MD, FACEP tPA Use & Repeat Exam tPA dosing: –8:21 pm, approx 1’45” after CVA sx onset –Initial bolus: 5 mg slow IVP over 2 minutes –Follow-up infusion: 40 mg infusion over 1 hour Repeat neuro exam at 90 minutes: –Repeat Exam: Increased speech & use of R arm, decreased mouth droop & visual neglect –Repeat NIH stroke scale: approximately 12-14

Scott Silvers, MD, FACEP ED tPA Documentation With tPA, there is a 30% greater chance of a good outcome at 3 months With tPA use, there is 10x greater risk of a symptomatic ICH (severe bleeding stroke) Mortality rates at 3 months are the same regardless of whether tPA is used Discuss the rationale, risk/benefit assessment for using or not using tPA Discuss what was done to expedite neurology consultation and neuroimaging

Scott Silvers, MD, FACEP Hospital Course & Disposition Hospital Course: No hemorrhage, improved neurologic function Disposition: Rehabilitation hospital 3 Month Exam: Near complete use of RUE, speech & vision improved, slight residual gait deficit Able to live at home with assistance

Scott Silvers, MD, FACEP Summary The NIHSS provides useful information and can be performed by emergency physicians Blood pressure must be carefully assessed and managed in acute ischemic stroke TPA considerations in therapy should be documented clearly

Scott Silvers, MD, FACEP ED Stroke Patient Rx: A Retrospective

Scott Silvers, MD, FACEP Questions?? Scott Silvers, MD (904) Questions?? Scott Silvers, MD (904) ferne_2005_acep_sa_silvers_BIC_stroke_fshow.ppt 8/6/2015 2:13 PM