The Child with a Neurological Alteration Flashcards
Review of the Central Nervous System (CNS)
* Composed of the __ and __
* Myelinization of the nerves begins approximately __th week of gestation and is completed by adolescence
* The axial skeleton protects the underlying structure of the CNS
brain; spinal cord
16th
> At birth, skull plates not fused but separated by non-ossified spaces - ___
> Posterior __ fuses by __ months
> Anterior __ fuses by __-__ months
> Allow cranium expansion due to rapid brain growth in infancy
> Brain growth measured by head circumference
* The brain and spinal cord are covered by the __
FONTANELS
fontanel; 2
fontanel; 16-18
meninges
The Brain
* Cerebrospinal fluid (CSF) surrounds the brain and spinal cord
> Infant has about __mL of CSF compared to an adult about __mL
> CSF acts like a “cushion” to reduce force trauma to the head
Functions of CSF
> Protects __, __, and __
> Maintains homeostasis
50mL; 150mL
brain, spinal cord, meninges
What are the 3 sections of the brain?
Cerebrum
Cerebellum
Brainstem
Cranial Nerves
12 pairs of cranial nerves (CN)
> Arise from the brain and brainstem
> Testing of the nerves can indicate location and degree of CNS injury
CN __, __, __, __
- Blink reflex
- Doll’s eye
II, III, IV, VI
CN __
- Rooting
- Sucking
V
CN __
- Facial expressions
VII
CN __
- Acoustic blink
- Doll’s eye
VIII
CN __, __
- Swallow, gag
IX, X
CN __
- Suck, swallow
- Tongue midline
XII
Spinal Cord
Regions
- Cervical
- Thoracic
- Lumbar
- Sacral
* Transmits signals to and from BRAIN through automatic motor responses
- REFLEXES (e.g., deep tendon reflexes)
?
* Also known as self-regulation
> Process allows cerebral arteries to change diameter in response to changes in cerebral perfusion pressure
* May be impaired by trauma, ischemia, increased intracranial pressure (ICP)
Autoregulation
↑ PaCO2 (above 40 mmHg) - cerebral vasodilation and ↑ cerebral blood flow (CBF)
↓ PaCO2 (25-30 mmHg) - cerebral vasoconstriction and ↓ CBF
Diagnostic Tests & Procedures
* CT scan
> If contrast need an IV line
> Check for allergies
* Angiography
> NPO
> Check for allergies
> Obtain consent
* Echoencephalopathy
* Electroencephalogram (EEG)
* Lumbar puncture
* MRI
?
Used to measure CSF pressure and obtain specimens
- Explain procedure to child according to developmental stage
- Obtain signed consent
- Lay on side with knees to chin
- Hold child by “hugging” knees to chin
- Will feel cool liquid while washing
- Feel “pinch” or “sting” while needle inserted
- Child MUST REMAIN STILL…encourage relaxation by singing, taking deep breaths, guided imagery
- MONITOR throughout procedure
> Cardiorespiratory status - After procedure child lays FLAT
Lumbar puncture
Increased Intracranial Pressure
- Pressure exerted by blood, brain, CSF, and any other space occupying fluid or mass
- Results from a disturbance in autoregulation
- Defined as pressure sustained at __ mmHg or higher for 5 minutes or longer
20 mmHg
Increased ICP - Manifestations: Infant
> Poor feeding or vomiting
> Irritability, restlessness, or lethargy
> Bulging fontanel
> High-pitched cry
> Increased head circumference
> Separation of cranial sutures
> Distended scalp veins
> Eyes deviated downward (“setting sun” sign)
> Increased or decreased response to pain
Increased ICP - Manifestations: Child
* Headache
* Diplopia
* Mood swings
* Slurred speech
* Papilledema (after 48 hours)
* Altered level of consciousness
* Nausea and vomiting, especially in the morning
ICP Neurologic Examination
* Level of consciousness (LOC)
> ___ (used to assess LOC)
- Eye opening
- Verbal response
- Motor response
> Scores range from 15 (no change in LOC) to 3 (deep coma or poor prognosis)
Glasgow Coma Scale (GCS)
* Behavior
> Alterations in normal pattern of behavior
> Irritability, mild confusion, agitation - all need further assessment
* Pupil evaluation
* Motor function
> Flexion = ___ posturing
- Flexion of upper extremities and extension of lower extremities
> Extension = ___ posturing
- Extension of upper and lower extremities with internal rotation of upper arms and wrists and knees and feet
decorticate
decerebrate
Vital signs
- Temperature ↑
- Cushing’s response
> Increased systolic BP with widening pulse pressure
> Change in RR and pattern
Increased ICP - Diagnostic evaluation
- CT scan
- MRI
- Lumbar puncture
- Serum and urine electrolytes
- ABG’s
> ICP normal blood gases
* PaO2 >80 mmHg
* PaCO2 <45 mmHg - CBC
- EEG
- Radiography
Increased ICP - Therapeutic management
Goal is to reduce the volume of CSF, preserving cerebral metabolic function, and avoiding increased ICP
* Intraventricular catheter used to drain CSF, measure ICP, administer medications
* Elevate HOB at 30°
* Maintain normothermia
* Administer
- osmotic diuretic
- hypertonic saline
- sedation and analgesia
- anticonvulsants
* Monitor blood glucose levels
Increased ICP - Nursing considerations: Decreased cerebral tissue perfusion
* Determine baseline age and developmental level
* Perform a baseline neurological and LOC assessment
* Monitor factors that may increase cerebral edema and ICP
* Maintain HOB at 30-45° angle
* Avoid the prone or flat, supine position, neck flexion, or hip flexion
* Decrease stimulation
* Monitor pupil reactivity
* Monitor VS every 1-2 hrs
* Measure head circumference
* Palpate anterior fontanelle every 8 hrs and cranial suture line every 8 hrs
* Observe for irregularity, lethargy, eating intolerance, and decreasing GCS score
* Keep emergency equipment near the bedside
Increased ICP - Nursing considerations: Poor nutritional intake: less than required
* Determine LOC before giving liquids
* Daily weights
* Monitor skin turgor, mucous membranes, eye orbits, urine output, urine specific gravity, and serum and urine electrolyte values
* Referral to a dietician
* Always position in an upright position after feedings
* Flexible feeding schedules with small feedings at a time
Standard Terms for Level of Consciousness
* Full consciousness
* Confused
* Delirious
* Disoriented
* Obtunded
* Stupor
* Coma
* Lethargic
?
Requires stimulation to arouse
Stupor
?
Inability to think clearly and rapidly; oriented to person
Confused
?
Awake, alert, oriented; interacts with environment
Full consciousness
?
Inability to recognize place or person
Disoriented
?
Sleeps and, once aroused, has limited interaction with environment
Obtunded