46 terms

Neurological disorders - part 2 - NUR 201 (Head injuries, brain tumors, seizures, meningitis, MS, Parkinsons)

Head injuries
poor prognosis if they have: intracranial hemorrhage, older age, abnormal motor responses, impaired or no eye movements, no pupil reaction, hypotension, hypercapnia, increased ICP > 20, Glasgow coma score <7
Diffuse injury (generalized)
damage to the brain cannot be localized to one particular area of the brain
ex. concussion - S&S brief disruption in LOC, amnesia regarding the event and HA, recovery with no permanent damage usually occurs within 24 hrs
Focal injury (localized)
can be minor to severe and can be localized to an area of injury
Ex: lacerations, contusions, hematomas, and cranial nerve injuries
contusion - bruising of brain tissue with rupture of small blood vessels and edema caused by a blunt blow to the head
closed head injury - occurs when the skull is not fractured but the brain tissue is injured and blood vessels may be ruptured by the force exerted against the skull
contrecoup injury - when the skull and brain hit a solid object, it causes the brain to rebound against the opposite side of the skull
Open head injury
injuries involving fractures or penetration of the brain by missiles or sharp objects
Depressed skull fracture
involves displacement of a piece of bone below the level of the skull - blood supply to the area is impaired and considerable pressure is exerted on the brain
Head injury complications
epidural hematoma - bleeding between the dura and the inner surface of the skull
S&S - initial period of unconsciousness at the scene with a brief lucid interval followed by decreased LOC, HA, N/V
Rx: rapid surgical intervention (burr hole) to prevent cerebral herniation
Subdural hematoma
bleeding between the dura mater and the arachnoid layer - usually venous origin - patient may develop decreased LOC and headache within 48 hrs of a head injury
Intracerebral hematoma
bleeding within the brain tissue, usually occurs within the frontal and temporal lobes
Subarachnoid hemorrhage
occurs when there is intracranial bleeding into the CSF filled space between arachnoid space and the pia mater
major cause is aneurysm
S&S: severe HA (worst in my life), altered LOC, photophobia, nuchal rigidity, N/V, focal deficits
Dx: H&P, CT, lumbar puncture (blood in CSF confirms), angiogram
Tx: volume expanders, BP control, Amicar (increase clot formation), Nimotop (prevent vasospasms)
Care of patient with head injury
respiratory - maintain patent airway: 1st priority, change in personality or behavior, keep cervical collar in place, if draining CSF apply loose dressing, neuro status Q2H, hx of injury
Raise HOB 30-45 degrees, administer O2 to maintain SAT > 92%, hyperventilate patient to keep the PaCO2 between 30-35 (to reduce the cerebral blood flow and decrease ICP), monitor for cushing's triad, don't attempt to suction or allow client to blow nose*, seizure precautions
Brain Tumor
abnormal mass resulting from excessive multiplication of cells
S&S: H/A only symptom in 20% of cases (worse in mornings), papilledema present in 70-75%, S&S IICP, personality changes
Brain tumor: surgical intervention
Craniotomy - incision through cranium with several burr holes
Craniectomy - excision of portion of the skull and complete removal of bone flap
Cranioplasty - plastic repair of skull after craniotomy
Intracranial surgery: pre op nursing care
consent, prophylactic meds: dilantin (monitor level *normal 10-20 - can cause hyperplasia) & decadron, prepare site, baseline assessment
Intracranial surgery: post op nursing care
VS and neuro assessment, resp status, ability to swallow, incision site (monitor for infix), HA, N/V, seizures, report yellow or clear drainage on dressing - test for glucose, report frequent swallowing or post-nasal drip, monitor for S&S meningitis, avoid activities that IICP, encourage deep breathing but no vigorous coughing
Supratentorial surgery
position low-semi fowlers on back or side opposite incision, bedrest 24-48 hrs
infratentoral surgery
position flat with small pillow to support head, position on side, bedrest 3-5 days
acute inflammation of the meningeal tissues surrounding the brain and spinal cord
Meningitis: clinical manifestations
fever, severe HA, N/V, decreased LOC, photophobia, signs of IICP, nuchal rigidity, positive Kernings sign, positive brudzinski's sign
possible skin rash and petechia
Meningitis: diagnostic studies
blood culture, CT scan, lumbar puncture, xrays of skull, MRI
Bacterial meningitis management
IV antibiotics, respiratory isolation x 24 hrs, corticosteroid may be given, symptomatic treatment for fever and IICP
Viral meningitis
causes: enteroviruses, arboviruses, HIV, HSV
S&S: HA, fever, stiff neck, photophobia
Dx: xpert EV test is used to dx viral meningitis
Tx: managed symptomatically
full recovery expected
Meningitis: nursing care
isolation, antipyretics, cooling blanket, report to health dept., decrease environmental stimuli, administer antibiotics after blood cultures drawn, seizure precautions
meds: antibiotics, anticonvulsants if IICP (Dilantin), antipyretics
Why do you maintain hyperventilation in head injury patients?
to reduce the cerebral blood flow and decrease ICP
What is recommended PaCO2 level maintained for hyperventilation
What is the normal cerebral perfusion pressure (CPP)
What is the normal ICP
What is the normal MAP
In which case may the patient develop decreased LOC and HA within 48 hrs of head injury
subdural hematoma
A nurse is caring for a patient who is scheduled for cerebral angiogram with contrast dye. Which statements should the nurse communicate to the MD?
I may be pregnant, I take coumadin, I am allergic to shellfish
When assessing a client with meningitis, the nurse looks for which of the following as a frequent first sign of IICP
change in mood or attention level (change in LOC)
The nurse is giving discharge instructions to a client who has been in the hospital with bacterial meningitis. What is the highest priority instruction?
take all antibiotics as directed until completely gone
Which of the following nursing interventions are appropriate for a patient who has meningitis at risk for IICP?
implement seizure precautions, turn room lights off and tv, administer antibiotics after blood cultures obtained
abrupt abnormal excessive and uncontrolled electrical discharge of neurons within the brain.
Generalized seizure (grand mal or tonic-clonic)
may begin with an aura, has two phases
Tonic: begins with a 15-20 seconds of stiffening of muscles and loss of consciousness.
Absence seizure: petit mal seizure
seizure consists of a loos of consciousness lasting a few seconds. Typical clinical manifestation is a brief staring spell.
Status epilepticus
state of continuous seizure activity. Seizures recur in rapid succession without return to consciousness between seizure. Most serious complication of epilepsy and is a medical emergency - neurons become exhausted and cease to function - permanent brain damage can result
Seizure disorder: management
anticonvulsant therapy: ex. phenobarbital avoid use with alcohol, management of status epileptic - top priority is airway - keep patient side lying, meds: ativan, phenobarbital, Dilantin for long term therapy
-document in detail: aura, length of time of tonic and clonic phase, any frothing, loss of consciousness, medicines given, seizure precautions applied, etc.
A patient calls and tells nurse that her monring dose of Dilantin was accidentally skipped and it is now 3 hrs before the next dose is due. The client typically takes Dilantin 3 times a day. What should the nurse tell the patient to do?
wait until the next scheduled time and take a regular dose (b/c the Dilantin is scheduled 3 times a day)
Multiple Sclerosis (MS)
-chronic, progressive degenerative disorder of the CNS
-it is an autoimmune disease
-demyelination and scarring of sites along the central nervous system
-marked by relapses and remissions that may or may not return the patient to their previous baseline level of function
-periods of exacerbations and remissions
-disease progresses eventually to the point of quadriplegia
-onset 20-40 years old
MS: clinical manifestations
-fatigue (space activities throughout day with periods of rest
-visual changes (diplopia - double vision, scotomas - white spots in visual field)
-weakness and spasticity of arms and legs, ataxia
-intension tremors
-cognitive changes, emotional problems
-bowel and bladder dysfunction
MS: diagnosis
can take months or years
MRI - shows presence of plaques
CSF - increased levels IGG antibody, protein and WBCs
CT - increased density of white matter
MS: management
treat symptoms and give supportive care, suppress immune system and decrease inflammation (chemo drugs and steroids), PREVENT INFECTION, manage muscle spasticity, neurogenic bladder, paresthesia and cerebellar ataxia
Parkinson's disease
progressive, degenerative neurological disease which affects the motor functions
DECREASED levels of dopamine
causes uncoordinated movements
symptoms occur d/t the overstimulation of the basal ganglia by acetylcholine
Parkinsons: clinical manifestations
Cardinal signs: tremors, muscle rigidity, bradykinesia, postural instability
-stooped posture, mask like face, short rapid shuffling and propulsive gait, slow to respond, pill rolling
Parkinsons disease: focus of nursing care
administer meds at prescribed times, monitor swallowing, maintain mobility as long as possible, promote patient communication as long as possible Safety
Parkinsons: medication
Dopaminergics (dopamin agonists) - increase amount of available dopamine at junction. Take with food, change positions slowly and wear TED hose
anticholinergics: ease tremors, drooling, and rigidity, blocks effects of acetylcholine
watch for:
blurred vision & photophobia, dry mouth (use gum, hard candy, frequent mouth care), delayed gastric emptying, urinary retention