Altered Loc And Increased Icp 1-16-07

  • June 2020
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1-16-07

Faith Kennedy

Altered LOC •

A symptom of an underlying condition



The most important indicator or a neuro clients condition



Gauged on a continuum



Fully alert -------------------Coma



Terms used to describe altered LOC



o

Confusion-impaired decision making

o

Disorientation-to person, place, or time, or situation

o

Lethargic/drowsy-respond appropriately but very slowly, limited spontaneous movement, sluggish speech, will usually arouse to voice or light touch

o

Obtunded-arouse will stimulation, easily fall back asleep, may be disoriented when aroused

o

Stuporous-(considered unconscious) takes a lot of difficulty to arouse, very deep sleep, takes vigorous stimulation to arouse, may be combative, may be able to follow simple commands

o

Semi-comatose-responds only to painful stimuli, pull away from a painful stimuli-cross midline

o

Coma-unaware of self or environment, can last for day-years, no verbalization, no opening of eyes, no purposeful response to stimuli, hypotonic-lack muscle tone, posturing

o

Akinetic mutism-state of unresponsiveness to environment, no movement or sound but opens eyes

o

Persistent Vegetative state-permanent damage to cerebral cortex, patient is wakeful (eyes are open), but are void of any conscious content, might be able to swallow

Be sure to document your observations (don’t just check one of these terms on your charting)

Pathophysiology •

Causes:



o

Neurologic

o

Toxicologic-drugs or alcohol

o

Metabolic –renal failure, dka

Involves disruption in: o

Cells

o

Neurotransmitters

o

Structure/anatomy

Clinical manifestations •

Restlessness, anxiety



Slowing of verbal and motor responses



Pupillary changes-change depending on the cause o

Ex. drug overdose-pinpoint

o

Increased pressure on brain-dilated and sluggish

Assessment and Diagnostic Findings •

CT



MRI



PET



EEG



Laboratory Test



Thorough physical assessment



Glascow Coma Scale o

Measures eye opening, verbal and motor responses to stimuli

o

Scores from 3 (deep coma) to 15 (normal)

o

Children under 2 years old have different criteria than adults, because they can’t obey commands

o

7 or 8 is considered severe head injury/ coma

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Faith Kennedy

Complications •

Respiratory failure



Pneumonia



Pressure ulcers



Aspiration



Contractures



Constipation



DVT

Medical management •

Obtain and maintain a patent airway



Monitor cardiac status



Nutrition and hydration



Determine and treat cause



Compensate for whatever they have lost

Nursing Assessment •

Assure the client is a t highest level of alertness



Have a parent present when assessing children



Verbal response



o

Orientation

o

Document if unable to assess (intubated)

Altertness o



Eye opening to command or stimulus

Motor response o

Purposeful, spontaneous, to stimulus

o

Posturing

o •



Decorticate



Decerebrate-indicates deeper brain damage, extension and external rotation

Flaccidity-worse than both, no response what so ever

Level of consciousness o

Response to stimuli

o

GCS



Pattern of respiration



Pupillary size and reaction



Eye movement (doll’s eyes)- only done by physician after spinal cord injury is ruled out, eyes should move together in the opposite direction the head is being moved



Oculovestibular response (Caloric test)-done by physician, eyes should deviate towards the stimulus



Protective reflexes o

Corneal

o

Gag

o

Loss of these two reflexes is a bad sign



Facial symmetry



Neck-meningitis



Deep tendon reflexes



Pathologic reflexes o



Babinski reflex- normal in babies up to 18 months-toes fan out, but if adult has positive babinski reflex this is abnormal

Abnormal posturing

Nursing Diagnosis •

Ineffective airway clearance

1-16-07

Faith Kennedy



R/F injury



Deficient fluid volume



Impaired oral mucous membranes



R/F impaired skin integrity



Impaired tissue integrity of cornea



Ineffective thermoregulation

Nursing Interventions •

Overall goal is to compensate for the client’s loss of protective reflexes



Maintaining the airways







o

Lateral or semi-prone positioning

o

Frequent mouth care and suctioning

o

HOB 30 degrees

o

Auscultate breath sounds q8h

o

May need intubation

Protecting the patient o

Side rails up X2, bed low

o

Avoid restraints if possible

o

Keep client calm and quiet

o

Protect client’s dignity

Maintaining nutrition and hydration o

I&O; daily weight

o

Slow IV fluid administration

o

NPO if unconscious

o

Tube feedings

Providing mouth care











o

Inspect for dryness, inflammation, crusting

o

Frequent oral care

o

Rotate ET tube site

Maintaining skin and joint integrity o

Frequent turning

o

Specialty beds

o

Passive ROM

o

Good body alignment

Preserving corneal integrity o

Clean with NS

o

Artificial tears

o

Close eyes before applying patch (need MD order)

Achieving thermoregulation o

Adjust environment

o

Administer antipyretics

o

Cool sponge baths, cooling blanket

Preventing urinary retention o

Assess for distention

o

Indwelling or intermittent catheterization

Promoting bowel function o o



Assess for abdominal distention Monitor bowel pattern

o

Check for impaction

o

Stool softeners, glycerin suppositories, enemas

Providing sensory stimulation

1-16-07







Faith Kennedy o

Maintain day/ night patterns

o

Touch and talk to client

o

Orient to time and place

o

Provide auditory stimulation

o

May need to decrease stimuli when client is arousing from coma

Meeting families needs o

Five accurate information

o

Provide emotional support

o

Refer to support groups

Monitoring and managing potential complications o

Respiratory failure

o

Pneumonia

o

Aspiration

o

Impaired skin integrity

o

DVT

Depending on cause o

Assess for seizures and increased ICP

o

Administer appropriate medications

Increased ICP •

“Box” theory-cranial vault is a large closed box that cannot expand o

85% is brain tissue

o

8% CSF

o

7% Blood



The body tries to compensate for changes, but has a very limited capacity



ICP-The force exerted by the brain, blood, and CSF within the skull



IF one component increases, then another must decrease (Monro-Kellie hypothesis)



Pressure remains in a state of equilibrium under normal conditions



Normal fluctuations do occur (sneezing, BP changes, O2 and CO2 levels)



Compensation is LIMITED!



Normal ICP : 10-20 mm Hg

Patho: increased ICP •

Relationship between intracranial volume and pressure is altered



Most commonly results from head trauma, but can also occur from tumor, hemorrhage, or infection



Results in : o

Decreased cerebral blood flow-compression of venous drainage system

o

Cerebral edema-fluid buildup in intra and extracellular spaces

o

Shifting of brain tissue-may rub up against rigid dural folds

o

Herniation

Cerebral Response to Increase ICP •

Pressure Autoregulation: o



Under normal circumstances, cerebral perfusion pressure (CPP) is maintained regardless of systemic blood pressure

Metabolic Autoregulation: o

Construction and dilation of blood vessels in response to O2 and CO2 levels

Compensation •

Most compensation for Increased ICP is accomplished through CSF regulation o

Decreased production

o

Increased reabsorption

o

Displacement

1-16-07 •



Faith Kennedy

The body compensates for increased ICP best when: o

There are small volume changes

o

The changes occur over longer periods of time

If compensation cannot be achieved, cerebral blood flow becomes compromised

Decompensation •

Autoregulatory mechanism fails



Venous compression and collapse with continued arterial flow to the brain, leading to increased ICP and decreased cerebral perfusion



Cerebral ischemia and infarction will occur



Herniation will occur and then brain death

Clinical manifestations of Increased ICP •

Altered LOC is the first sign



Motor and sensory loss



Headache



Pupillary changes- pupils begin to dilate (pressure on nerve III), sluggish



Papilledema-bulging of the optic disc- opthalmascope



Vomiting (projectile) due to pressure on medulla, sometimes no nausea



Alterations in Vital signs: o



Cushing’s response (Cushing’s reflex) 

Elevated systolic BP



Widened pulse pressure



Slowing of heart rate



Bounding pulse

Altered respirations o

Initially increased



Elevated temperature



Cushing’s triad (decompensation)



o

Hypertension

o

Bradycardia

o

Bradypnea

Loss of brain stem reflexes (corneal/gag)

Lifespan Considerations •

Elderly o



May have increased ICP with delayed signs and symptoms due to cerebral atrophy (decreased brain mass)

Infants and Children o

May have increased ICP with delayed s/s due to open fontanels and sutures

o

Sutures may be re-opened up to the age of 10

Infants with Increased ICP •

Clinical Manifestations o

Tense, bulging fontanels

o

Separated cranial sutures

o

Macewen (cracked pot) sign-heard on percussion

o

Irritability

o

High-pitch cry

o

Increased head circumference

o

Distended scalp veins

o

Changes in feeding

o

Crying when held or rocked

o

“Setting sun” sign-eyes deviate downward

1-16-07

Faith Kennedy

Children with increased ICP •

Headache



Nausea



Vomiting (often without nausea)



Diplopia, blurred vision



Seizures



Personality and behavior changes

Diagnostic studies •

CT



MRI



PET



TCD



Lumbar Puncture is avoided- can cause brain stem herniation

Complications of Increased ICP •

Brain stem herniation



Diabetes insipidus



Syndrome of inappropriate antidiuretic hormone (SIADH)

Brain Herniation •

Shifting of brain tissue from an area of high pressure to an area of lower pressure through openings in rigid dura

Management of Increased ICP •

Treated as an EMERGENCY



Monitoring ICP o

Ventriculostomy- may see on floor, small catheter inserted into lateral ventricle, usually on non-dominant side of the brain 10-20 is normal ICP







o

Subarachnoid bolt

o

Epidural monitor

o

Fiberoptic monitor

Decreaseing cerebral edema o

Osmotic diuretics (mannitol)

o

Corticosteriods (dexamethasone)

o

Fluid restriction

Mantaining cerebral perfusion o









The only time we touch this is to change the drainage bag

Improving CPP by improving cardiac output (fluid volume, inotropic agents)

Reducing CSF and intracranial blood volume o

Cautious CSF drainage

o

Hyperventilation

Controlling fever o

Antipyretics

o

Cooling blanket

o

AVOID shivering (increases ICP)

Maintaining oxygenation o

ABG monitoring, O2 sat

o

O2 administration

Reducing metabolic demands o

High dose barbiturates

o

Pharmacologic paralytic agents

Nursing Diagnosis •

Ineffective airway clearance r/t diminished protective reflexes

1-16-07

Faith Kennedy



Ineffective breathing patterns r/t neurologic dysfunction



Ineffective cerebral tissue perfusion

Bowel/Bladder Dysfunction in the Neuro Client Goals of Management •

Control of incontinence



Establish regular elimination pattern

Etiology •

Neurological impairement



Cognitive impairement



Mobility/functional impairement-can’t get to the bathroom

Bladder dysfunction •



Assessment o

History

o

Baseline

Nursing Diagnosis o

Urinary retention

o

Incontinence 



Reflex (neurogenic) •

Only reflexive emptying, can’t get conscious control



Upper neuron injury



Needs stimulation of reflex to empty

Functional •

Has conscious ability, but can’t



o

Total •

Don’t have conscious ability or functional ability to get to the bathroom



Goal is skin care

Self-care deficit: Toileting

Nursing Management: Bladder Dysfunction •

Bladder retraining o

Drink fluids 30 minutes before stimulating bladder reflex



Indwelling catheter insertion and care



Intermittent catheterization



Condom catheters



Increase fluids



Crede maneuver-increases abdominal pressure



Provide privacy



Barrier free access to toilet



Modification of clothing



Habit training



Management of incontinence

Bowel Dysfunction •

Assessment



Nursing Diagnosis o

Constipation

o

Diarrhea

o

Incontinence

Nursing management •

Bowel programs

1-16-07

Faith Kennedy



Digital stimulation



Barrier free access to toilet



Positioning



Dietary consideration



Increasing activity and exercise



Provide privacy



Medications



o

Bulk formers

o

Stool softeners

o

Mild laxative

o

Suppositories

Enemas

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