Neurological Emergencies Flashcards
AVPU
Alert
Verbal
Pain
Unresponsive
Cranial nerve: smell (rarely tested)
I: Olfactory
Cranial nerve: visual acuity, visual fields, detection of light reflex
II: Optic
Cranial nerve: constriction/dilation of pupil, opens the eyelid, most of the EOMs - up, down, in
III: Oculomotor
Cranial nerve: EOMs - look down & inward
IV: Trochlear
Cranial nerve: corneal reflex, sensation of the face, scalp, mouth and nose, chewing and jaw movement
V: Trigeminal
Cranial nerve: EOMs - move eye laterally
VI: Abducens
Cranial nerve: smile, closes the eyelid, facial movement, anterior taste (rarely tested)
VII: Facial
Cranial nerve: hearing and balance
VIII: Acoustic (Vestibulocochlear)
Cranial nerve: swallow, gag reflex, posterior taste (rarely tested)
IX: Glossopharyngeal
Cranial nerve: sympathetic/parasympathetic responses (HR, BP, breathing), thoracic and abdominal viscera, gag reflex, speech
X: Vagus
Cranial nerve: shoulder shrug, head turning
XI: Spinal accessory
Cranial nerve: tongue movement
XII: Hypoglossal
Why does a post lumbar puncture patient complain of a headache?
A. Meningitis
B. Subarachnoid hemorrhage
C. CSF leak
D. Herniation
C. CSF leak
(Tx with blood patch)
Which of the following assessment findings is commonly associated with dementia?
A. Altered mentation
B. Altered gait
C. Impaired visual acuity
D. Paresthesias
A. Altered mentation
Brain stem integrity reflex: Positive (normal) finding - while turning the head rapidly side to side, the eyes move the opposite direction to which the head is turned.
C-spine integrity must be intact before testing!!!!
Oculocephalic Reflex (doll’s eye)
Brain stem integrity reflex: Ice water calorics; Positive (normal) finding - the eyes turn slowly toward the ear in which the ice water is injected into,
then rapidly turn away.
Tympanic membrane integrity must be intact before testing!!!
Oculovestibular Reflex
Brain stem integrity test: Allow CO2 to build up to stimulate the
respiratory system to determine if patients will breath on their own
Apnea test
MAP - ICP =
Cerebral Perfusion Pressure (CPP)
Normal ICP
1-15 mmHg
Normal CPP
60-70 mmHg (must be at least 50 to maintain cerebral perfusion)
Which is worse:
Decorticate posturing (arms bending and wrists and hands clenched in flexion)
or
Decerebrate posturing (arms and legs held straight out into extension, the toes pointed downward in extension, the head and neck arched and extended backward)
Decerebrate posturing
Very Late sign of Increased ICP. Consists of increased systolic BP (widening pulse pressure), profound bradycardia & abnormal respiratory pattern
Cushing’s Triad
Cushing’s Triad
-increased systolic BP (widening pulse pressure)
-profound bradycardia
-abnormal respiratory pattern
Another sign of increased ICP resulting from shifting of brain tissue. Etiology can be related to tumors, bleeding, swelling. Usually have some altered LOC, posturing, VS changes
Herniation
This type of herniation causes dilated pupils uni or bi-laterally
Uncal herniation
This type of herniation causes constricted pupils equal
Central herniation
GCS Motor Response
-Obeys commands 6
-Localizes to noxious stimuli (pain) 5
-Withdrawal (flexion) from pain 4
-Abnormal flexion 3
-Abnormal extension 2
-No response 1
GCS Verbal Response
-Oriented and converses 5
-Confused but converses 4
-Verbalizes but inappropriate words 3
-Incomprehensible words or sounds 2
-No verbal response 1
GCS Eye Opening
-Spontaneously opens eyes 4
-Opens eyes to speech 3
-Opens eyes to pain 2
-No eye opening 1
Glascow Coma Scale
Motor = 6
Verbal = 5
Eye = 4
Pupillary changes with:
-Metabolic imbalances, diencephalic dysfunction
-Third cranial nerve dysfunction, anoxia
-Midbrain dysfunction
-Pontine dysfunction, opiates, miotic drugs
-Metabolic imbalances, diencephalic dysfunction = small, reactive, regular shape
-Third cranial nerve dysfunction, anoxia = fixed and dilated
-Midbrain dysfunction = misposition and fixed
-Pontine dysfunction, opiates, miotic drugs = pinpoint, nonreactive
Respiratory rate/pattern: Regular cycles of resp. that gradually increase
in depth and then decrease in depth to periods of apnea. Caused by lesions deep in cerebral hemispheres, diencephalon or basal ganglia
Cheyne-Stokes
Respiratory rate/pattern: Deep, rapid respirations caused by problems in the lower midbrain or upper pons
Central Neurogenic
Respiratory rate/pattern: Prolonged inspiration followed by a 2-3 sec
pause caused by problems in the pons
Apneustic
Respiratory rate/pattern: Irregular, unpredictable, shallow, then deep respirations with pauses caused by problems in the upper medulla or lower pons
Ataxic
8 assessment findings in shunt malfunction
-Vomiting
*Headache
*Irritability
*Inconsolable
*High pitched cry
* Fever
*Redness along shunt line
* Fluid around shunt valve
What are the causes of VP shunt malfunction?
*Infection (fever, warmth/redness/swelling near reservoir, other s/s of increased ICP)
*Obstruction (altered LOC, emesis often w/o nausea, pupil changes, VS changes indicative of increased ICP)
Normal until ~age 2. Occurs after the sole of the foot has been firmly stroked. The big toe then moves upward or toward the top surface of the foot and the other toes fan out.
Babinski (plantar) Reflex
When does the anterior fontanel close?
Posterior?
Anterior: 9-18 months
Posterior: ~2 months
This may be caused by a history of Group B strep or herpes exposure during delivery. Symptoms in baby are a sharp/shrill cry, irritable, loss
of appetite.
Meningitis
Type of headaches with no organic cause. Types include migraine, cluster HA, tension HA.
Primary
Type of HA with organic etiology, likely from tumor or aneurysm
Secondary
Primary HA that can last up to 7 days (CONSTANT NON-PULSATING PAIN), rarely have N/V or photophobia, cervical muscle tenderness
Tension