US-Guided PIV Placement + Ischemic Stroke + Meningitis (oops) Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

When is PIV placement indicated?

A

Administration of IV fluids and medications

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2
Q

What are 5 examples when IV access might be difficult?

A
Obesity
IV drug abuse
Multiple previous IV catheters
Children
Hx of difficult IVs
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3
Q

When should US guidance be used?

A

After 2 failed attempts, or immediately if hx of difficult IV access

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4
Q

What are the two approaches to positioning the US transducer and how do they vary?

A

Transverse - easier to learn, allows simultaneous visualization of veins, arteries, and other structures
Longitudinal - preferred by experienced providers because it allows better visualization of the needle

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5
Q

List potential cannulation sites.

A

Antecubital
Basilic (medial)
Cephalic (lateral)
Brachial

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6
Q

Common size range for standard IV catheters? Length of a standard catheter?

A

24-gauge (newborns) to 14-gauge (adult trauma); 3.2 cm

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7
Q

When are long IV catheters needed?

A

For veins that lie >1 cm from the surface of the skin

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8
Q

Where does the brachial artery lie?

A

Usually just medial to the median cubital vein

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9
Q

87% of strokes are caused by what etiology?

A

Ischemic; others caused by intracerebral or subarachnoid hemorrhage

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10
Q

DDx - stroke

A

Structural brain lesion (Tumor, AVM, aneurysm, hemorrhage)
Infection (encephalitis, meningitis, cerebral abscess, septic emboli)
Seizure disorder and post-seizure neuro deficit (Todd’s paralysis)
Peripheral neuropathy (Bell’s palsy)
Complicated migraine
Hypoglycemia
Hypertensive encephalopathy
Middle ear pathology (Meniere’s disease or labryinthitis)
Drug toxicity (eg, phenytoin, lithium)
Demyelinating disease
Bell’s Palsy
Conversion disorder

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11
Q

Initial actions and primary survey in stroke?

A

ABCs
Hypoxemia and hypotension due to stroke may worsen symptoms and lead to death
Focused H&P to assess level of dysfunction, exclude alternate diagnoses, and determine eligibility for therapy

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12
Q

Important features of the history in suspected stroke?

A

Exact time of onset (“last known well”)
Detailed history of onset, time course, pattern of symptoms
Stroke risk factors + stroke mimic risk factors

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13
Q

Stroke risk factors?

A
HTN
DM
HLD
Tobacco abuse
Advanced age
AFib
Prosthetic heart valve
Prior stroke
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14
Q

Components of NIH Stroke Scale?

A
Level of consciousness 
Level of consciousness questions - age? month?
Level of consciousness commands - "close your eyes" "make a fist" 
Best gaze
Visual fields
Facial paresis
Best motor - L arm
Best motor - R arm
Best motor - L leg
Best motor - R leg
Limb ataxia
Sensory (pinprick)
Best language
Dysarthria
Neglect/inattention
0: Normal
1-4: Minor
5-15: Moderate
15-20: Moderately Severe
>20: Severe
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15
Q

Presentation of stroke in ACA territory?

A

Unilateral weakness and/or sensory loss of contralateral lower extremity > upper extremity

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16
Q

Presentation of stroke in MCA territory?

A

Unilateral weakness and/or sensory loss of contralateral face and upper extremity > lower extremity with either aphasia (dominant hemisphere) or neglect (non-dominant hemisphere)

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17
Q

Presentation of stroke in PCA territory?

A

Unilateral visual field deficit in both eyes (homonymous hemianopsia)

18
Q

Presentation of vertebrobasilar syndromes?

A

Multiple deficits which typically include contralateral weakness and/or sensory loss in combination with ipsilateral CN palsies; suspicion for posterior circulation stroke is heightened if there is one of the following - diplopia, dysarthria, dysphagia, droopy face, dysequilibrium, dysmetria, and decreased level of consciousness
N/V

19
Q

Presentation of lacunar infarcts?

A

Large variety of clinical deficits, characterized by >70 different clinical syndromes; 5 common syndromes - pure motor hemiparesis, sensorimotor stroke, ataxic hemiparesis, pure sensory stroke, dysarthria-clumsy hand syndrome

20
Q

Guidelines for initial evaluation and treatment of acute stroke in the ED?

A

Door to physician: 10 minutes
Door to stroke team: 15 minutes
Door to lab work completed: 45 minutes (CBC, BMP, PT/PTT, UA, EKG, CXR)
Door to non-contrast CT-head ordered: 25 minutes
Door to CT interpretation; 45 minutes
Door to decision to give tPA: 45 minutes
Door to drug administration: 60 minutes (and less than 3 hours from onset)
Door to admission: 180 minutes

21
Q

What is the earliest finding that may be present on CT in an acute ischemic stroke?

A

Hyperdensity representing acute thrombus or embolus in a major intracranial vessel (most frequently seen in MCA and basilar arteries)

22
Q

Subsequent findings on CT in acute ischemic stroke?

A

Subtle hypoattenuation causing obscuration of the nuclei in the basal ganglia and loss of gray/white differentiation in the cortex

Frank hypodensity is indicative of completed stroke

23
Q

Inclusion criteria for IV rTPA in acute ischemic stroke?

A

Dx of ischemic stroke causing measurable neurologic deficits
Onset of symptoms <3 hours before beginning treatment
Age 18+

24
Q

Exclusion criteria for IV rTPA in acute ischemic stroke?

A

Significant head trauma or prior stroke in past 3 months
Symptoms suggesting SAH
Arterial puncture at non-compressible site in previous 7 days
History fo previous ICH
Intracranial neoplasm, AV malformation, or aneurysm
Recent intracranial or intraspinal surgery
Elevated BP (systolic >185 or diastolic >110)
Active internal bleeding
Acute bleeding diathesis including but not limited to:
-Platelets <100,000
-Heparin received within 48 hours resulting in aPTT > upper limit of normal
-Current use of anticoagulant with INR >1.7 or PT>1.5
-Current use of direct thrombin inhibitors or director factor 10a inhibitors
Blood glucose <50
CT demonstrates multilobar infarction (hypodensity >1/3 hemisphere)

25
Q

Relative exclusion criteria for IV rTPA in acute ischemic stroke?

A

Only minor or rapidly improving stroke symptoms
Pregnancy
Seizure at onset with post-ictal residual neuro impairments
Major surgery or serious trauma within previous 14 days
Recent GI or urinary tract hemorrhage in previous 21 days
Recent acute MI in past 3 months

26
Q

Important aspects of care during and after administration of tPA?

A

Admission to ICU or stroke unit
Frequent reassessment of the patient’s neuro status
Careful BP monitoring
Emergent non-contrast head CT if development of acute severe headache, acute severe hyeprtension, intractable N/V, AMS, or other evidence of neuro deterioration

27
Q

Alternative therapies in stroke?

A

Select patients presenting to specialized stroke centers >4.5 hours after onset of symptoms may be eligible for intra-arterial thrombolytic therapy, mechanical thrombectomy, or intracranial angioplasty and stenting in the setting of a clinical trial

28
Q

Supportive care in stroke patients not receiving rTPA or other therapy?

A

Prevent or treat acute complications by providing supportive care, including ventilatory support and O2, prevention of hyperthermia, cardiac monitoring and treatment, and control of BP and blood glucose

29
Q

Goal BP in patients receiving rtPA?

A

<180/105

30
Q

For patients not receiving rTPA and who do not have other medical conditions requiring aggressive BP control, do not initiate anti-hypertensives unless BP exceeds ___.

A

220/120

31
Q

Antiplatelet therapy in acute ischemic stroke?

A

Administration of aspirin within 48 hours has been shown to improve outcomes by reducing the rate of early recurrent stroke

In those not receiving rtPA, oral administration within 24-48 hours of onset is recommended Do not administer for at least 24 hours in those receiving rTPA.

32
Q

When is meningitis classified as aseptic?

A

When the inflammation is due to drugs or non-bacterial causes

33
Q

Most common causes of aseptic meningitis? Other causes?

A

Enterovirus
Echovirus

Drugs, rheumatologic conditions, viruses, parasitic infections, fungal infections, malignancy, HIV, HSV, syphilis, Lyme disease, RMSF, Ehrlichiosis, autoimmune diseases

34
Q

Initial actions and primary survey in suspected meningitis?

A

ABC
If bacterial meningitis is likely, antibiotics should be given immediately after a prompt LP or soon after BCx are drawn if there is an anticipated delay in obtaining the LP
Antivirals if HSV encephalitis is suspected

35
Q

When should a CT scan be considered prior to an LP?

A
Altered mental status
New onset seizures
Immunocompromise
Focal neurologic signs
Papilledema
36
Q

CSF findings suggestive of bacterial meningitis?

A

Positive Gram stain with identified organism
Glucose <40 or ratio fo CSF/blood glucose <0.40
Protein >200/dL
WBC >1000/mL
>80% PMNs
Elevated opening pressure of CSF (obtained with patient in lateral decubitus position)

37
Q

CSF findings suggestive of encephalitis?

A

Increased WBCs with a lymphocytic predominance

May reveal increased RBCs due to neuronal cell death leading to edema, hemorrhage, and necrosis

38
Q

Empiric therapy in suspected meningitis (neonate <1 month)

A

Ampicillin and cefotaxime

Alternative - ampicillin and gentamicin

39
Q

Empiric therapy in suspected meningitis (infants 1-3 months)

A

Ampicillin and cefotaxime

40
Q

Empiric therapy in suspected meningitis (children >3 months + adults <50 years)

A
Dexamethasone Q6hrs for 4 days
(consider before 1st dose ABX)
and cefotaxime (or ceftriaxone) and vancomycin
41
Q

Empiric therapy in suspected meningitis (adults >50 years)

A
Dexamethasone Q6hrs for 4 days
(consider before 1st dose ABX)
and cefotaxime (or ceftriaxone) and vancomycin and ampicillin