98 年專科護理師訓練 神經系統常見問題之評估 ( 二 )
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98 年專科護理師訓練 神經系統常見問題之評估 ( 二 ). 意識不清 Confuse 情緒和行為的改變 Mood & behavior change. 成大醫院神經科 黃涵薇醫師. Consciousness. Level The state of arousal Content The quality and coherence of thought and behavior (awareness). Thalamocortical radiation. thalamus. Moruzzi & Magoun, 1949. - PowerPoint PPT PresentationTRANSCRIPT
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98 年專科護理師訓練神經系統常見問題之評估
( 二 )
意識不清 意識不清 ConfuseConfuse情緒和行為的改變 情緒和行為的改變 Mood & behavior changeMood & behavior change
成大醫院神經科 黃涵薇醫師
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ConsciousnessConsciousness
Level The state of arousal
Content The quality and coherence of thought and
behavior (awareness)
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thalamus
Moruzzi & Magoun, 1949
Thalamocortical radiation
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Attention
Attention in both right and left aspects of extrapersonal space is governed by the "nondominant" parietal and frontal lobes.
Insight and judgment are dependent on intact higher order integrated cortical function, especially regarding frontal lobe involvement in scrutinizing incoming sensory information
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High cortical function 高等皮質功能
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Terms to describe consciousness
Normal (Clear) consciousness Confusion Drowsiness Stupor Coma
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Confusion
A problem with coherent thinking The p’t doesn’t take into account all el
ements of his immediate environment Deficit in working memory (reduced attentio
n) “clouding of sensorium” “sun-downing phenomenon”
Missed day/night light cues Deterioration of suprachiasmatic nucleus of the hypothal
amus Disruption of REM sleep
Delirium "acute confusional state"
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Drowsiness The p’t is inability to sustain a wakeful
state without the application of external stimuli
Stupor The p’t can be roused only by vigorous
and repeated stimuli Response is absent or slow and inadequate Common with restless or stereotyped motor
activity
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Coma
The p’t who appears to be asleep and incapable of being aroused by external stimuli or inner need Degrees of severity : reflexes
Semicoma Sleep vs. Coma
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Dilirium (DSM IV) Disturbance of consciousness with reduced ability
to focus, sustain, or shift attention. This loss of mental clarity is often subtle and may
precede more flagrant signs of delirium by one day or more ; Distractibility
A change in cognition or the development of a perceptual disturbance that is not better accounted for by a preexisting, established, or evolving dementia. memory loss, disorientation, and difficulty with
language and speech The disturbance develops over a short period of
time (usually hours to days) and tends to fluctuate during the course of the day.
There is evidence from the history, physical examination, or laboratory findings that the disturbance is caused by a medical condition, substance intoxication, or medication side effect.
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Additional features with delirium
Psychomotor behavioral disturbances Hyperactivity
irritability, anxiety, emotional lability, and hypersensitivity to lights and sounds
Hypoactivity quiet, withdrawn state
Increased sympathetic activity Sleep-wake reversals Variable emotional disturbances
fear, depression, euphoria, or perplexity. Delusion, hallucination
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Motoric subtypes Lipowsk, 1983
Hyperactive Hypoactive
D/D with depression : circadian disturbance
Worse prognosis Mixed type
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Nearly 30 percent of older medical patients experience delirium at some time during hospitalization
Patients with delirium experience prolonged hospitalizations, functional decline, and are at high risk for institutionalization.
Signs of delirium may persist for 12 months or longer, particularly in those with underlying dementia.
Mortality associated with delirium is high, approximately twice that of patients without delirium JAMA 2004;291:1753-62
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Etiological factors of delirium types
Due to a general medical condition Include due to the physiological effects of a
medication Due to multiple etiologies
Include multiple general medical conditions, multiple medications, or combination
Substance-induced delirium Substance-withdrawal delirium Delirium not otherwise specified
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CNS lesions & delirium (1)
P’t with preexisting CNS illness are especially vulnerable to delirium Dementia Parkinsonism MS Head trauma CNS tumors Seizure disorder Depression Alcohol or substance abuse
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Acute or subacute CNS lesions or diseases are commonly associated with delirium in the acute presentation Head trauma Stroke CNS lupus Giant cell arteritis Seizures HIV complex
CNS lesions & delirium (2)
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Non-CNS predisposing factors of delirium
CVD Pulmonary disease
Ischemia-hypoxia Hypercapnia
Renal disease Liver disease Local or systemic infectio
n Anemia Burns Dehydration Sensory deprivation
Poor nutritional status Electrolyte or sugar disturba
nce Sodium, phosphate Hypo/hyperglycemia
Use of physical restraints Polypharmacy Increased age and male gen
der Sleep disturbance Overall severity of the syste
mic illness Iatrogenic events (eg. Invasi
ve procedures, urinary catheterization)
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Medications may lead to delirium cholinergic, dopaminergic, GABAergic, opioid-receptor function
Opioids Antihistamines Anticholinergics BZD Barbituates Other sedatives Psychotropics Anticonvulsants Antiparkinsonian
Corticosteroids Immunosuppressants CV medications GI medications Antibiotics Muscle relaxants
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“DEMENTIA” D—drug and alcohol- 感冒藥水 E—electrolyte M—metabolism and nutrition, MS, B12, 葉酸 EN—endocrine and neurological disease T—tumor—NPC, hepatoma, Colon CA, pancreas I—infection 梅毒 , HIV, 感冒後 A—autoimmune disorder,such as RA
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PSYCHOSIS Hallucinations
Auditory hallucinations signify a primary psychiatric disorder, such as schizophrenia
Nonauditory hallucinations suggest psychosis in the context of a medical problem such as alcohol withdrawal
Delusions False beliefs that are firmly held despite obvious evidence t
o the contrary, and not typical of the patient's culture, faith, or family.
Thought disorganization Disruption of the logical process of thought may be represe
nted by loose associations, nonsensical speech, or bizarre behavior.
Agitation Aggression
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Formal psychotic disorders Schizophrenia (DSM-IV-TR)
Schizoaffecive disorder Schizophreniform disord
er Brief psychotic disorder Delusional disorder Shared psychotic disorde
r Substance induced psych
osis Psychosis due to a gener
al medical condition Psychosis - Not otherwise
specified
Other illness may with psychosis Bipolar disorder (m
anic depression), Unipolar depressio
n Delirium Drug withdrawl
•
A psychotic individual may be able to perform actions that require a high level of intellectual effort in clear consciousness, whereas a delirious individual will have impaired memory and cognitive function
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Pathophysiology of coma Morphologic
Infratentorial Brainstem -- ARAS : direct or indirect
Supratentorial Thalamus Widespread bilateral hemisphere Secondary effect on diencephalons & upper brains
tem Herniation
Metabolic Disturbance of neuronal activity
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Brain Herniation
1. Transfalcial 2. Horizontal
–-- Kernohan-Woltman phenomenon
3. Transtentorial (Uncal)
4. Cerebellar tonsiller
“Duret hemorrhage”
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Central syndrome of rostrocaudal deterioration
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Metabolic & other diffuse disorders (65%) Supratentorial mass lesions (20%) Infratentorial lesions (13%) Psychiatric disorders (2%)
Final diagnosis in 500 p’ts admitted to hospital
with “ coma of unknown etiology” Plum & Posner (1980)
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Metabolic encephalopathy
Functions subserved by complex polysynaptic pathways are affected earlier by metabolic disturbances
Asymmetric motor findings speak against the diagnosis of metabolic encephalopathy
Toxic-metabolic disorders frequently induce abnormal movements Tremor, asterixis, myoclonus, seizure
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Generally, the degree of conscious disturbance parallels the reduction in cerebral metabolism/blood flow CBF
normal : 55 mL/min/100 g Coma : < 12~15 mL/min/100 g
Arterial PH Direct effects on neuronal membranes or
neurotransmitters and their receptors
Metabolic encephalopathy
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Exceptions
Neurological problems without focal signs Meningitis SAH→ meningism
Metabolic problems with focal signs Hypoglycemic encephalopathy Hypertensive encephalopathy
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Other related conditions (Persistent) vegetative state
Diffuse cerebral injury. Ex. Trauma, anoxia Akinetic mutism
Bilateral anterior frontal lesions Lock-in syndrome
Basis pontis lesion Brain death Catatonia Psychogenic unresponsiveness
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ComaComa
Brainstem function
Focal sign
Meningism
(+) (-)
(+) (-)
(+) (-)
SAH
Meningitis
Metabolic – toxic
Supratentorial
Infratentorial
Herniation
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腦葉皮質功能障礙症狀 (1) Frontal lobe 額葉
任一側 : 對側運動障礙 , 個性改變 左 : 運動型失語症 motor aphasia 兩側 : 失動 akinetic mutism, 失禁
Prietal lobe 頂葉 任一側 : 對側感覺障礙 , 對側下四分之一視野缺損 左 : 失用症 apraxia, 失讀症 alexia 右 : 忽略對側 hemineglect , 迷路
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腦葉皮質功能障礙症狀 (2)
Temporal lobe 顳葉 任一側 : 對側上四分之一視野缺損 , 記憶或情緒障礙 左 : 感覺型失語症 sensory aphasia 右 : 空間觀念障礙 兩側 : 短期記憶缺損 , 冷漠
Occipital lobe 枕葉 任一側 : 對側二分之一視野缺損 , 視幻覺 左 : 辨色困難 兩側 : 皮質性失明 cortical blindness
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Complex partial seizure Awake but are not in contact with others in their environ
ment and do not respond normally to instructions or questions ; often seem to stare into space
Either remain motionless or engage in repetitive behaviors, called automatisms facial grimacing, gesturing, chewing, lip smacking, snapp
ing fingers, repeating words or phrases, walking, running, or undressing.
May become hostile or aggressive if physically restrained during the event
Typically last less than three minutes Postictal phase
often characterized by somnolence, confusion, and headache for up to several hours
the patient has no memory of what took place during the seizure other than, perhaps, the aura.
Nonconvulsive status epilepticus
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Transient global amnesia
Striking amnesia with preservation of other cognitive domains
Last usually several hours and are without postictal lethargy or other motor manifestations of seizures
Episodes of amnesia that are epileptic in origin will typically also include olfactory hallucinations, abnormal behaviors, and/or motor automatisms, features that are absent in TGA
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Approach patients with ConfusionConfusion
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焦點病史 Ascertain the patient's level of functi
oning prior to the onset of conscious problem
Onset, duration, course Associated Symptoms
Life event? Head trauma? Insomnia? Sleepy? Headache/dizziness? Appetite? Vomiting/diarrhea? Fever? Palpitations? Dyspnea? Staggering or ataxic gait? Double vision? Slu
rred speech? Numbness / weakness of the face or body? Clumsiness, or incoordination?
Medications / Substance
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焦點身體檢查 Physical examination
T/P/R and BP Skin Eyes: conjunctiva pale/icteric or not Breathing sound Bowel sound Bladder palpation
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Eye opening 4 : spontaneous 3 : to speech 2: to pain 1: none
Verbal response 5 : oriented 4: confused 3: words 2: sounds 1: none
Motor response 6: obey commands 5: localizing to pain 4: withdrawal from pain 3: flexion to pain 2: extension to pain 1: none
Glasgow coma scale(Teasdale & Jennett, 1977)
VA: aphasia
VT: trachea
Aphasia?
Dysarthria?
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To check “Attention”
Digit span Inability to repeat a string of at least 5 digits i
ndicates probable impairment Vigilance “A” test ( 逢 3 舉手 )
Read a list of 60 letters, among which the letter "A" appears with greater than random frequency.
More than 2 errors is considered abnormal.
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Conscious ContentContent evaluation
JOMAC Judgment: 失火了要怎麼辦 ? Orientation: 人 , 時 , 地 Memory: 短期 (ex.3 objects in 5 minute
s), 長期 (ex. 住址 ) Abstract thinking: 比較物體 / 成語解釋 Calculation (ex. 100-7 series, 20-3 serie
s)
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不識字 小學識字
中學畢業
50-69 y/o
≤16 ≤ 20 ≤ 24
≥70 y/o
≤ 14 ≤ 19 ≤ 23
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Localization : Focal sign or not ? Brainstem reflexes
Pupils / light reflex Eye position, EOM Corneal reflex Oculocephalic reflex (Doll’s eye sign) Oculovestibular reflex Respiratory patterns Gag reflex
Long tract sign Muscle power (asymmetry?) Babinski sign
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中腦III 動眼 , IV 滑車 , VI 外展
橋腦V 三叉 , VII 顏面 , VIII 聽平衡
延腦IX 舌咽 , X 迷走 , XI 副 , XII 舌下
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Pupils & Light reflex
tegmentum,irregular
,reactive
Hypothalamus miosis
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Spontaneous eye movement in comatose patients
Periodic alternating gaze (ping-pong gaze) Bilateral cerebral damage, rarely posterior fossa lesion
Repetitive divergence Metabolic encephalopathy
Ocular bobbing Pontine, extra-axial posterior fossa mass, diffuse encephalop
athy Ocular dipping
Anoxia, post-status epilepticus Nystagmoid jerking of a single eye
Middle or low pontineRoving eye movement
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Conjugate gaze Hemispheric lesion (frontal eye field)
Look to lesion side Lower pontine tegmentum
Look away from lesion side Disconjugate gaze
MLF syndrome Skew deviation
Eye movement - abnormality of gaze
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Horizontal Gaze pathway
Contralateral Frontal eye field (area 8)
PPRF
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視野檢查
Confrontation test(Threaten test)
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V 三叉神經 顏面感覺
V1, V2, V3 咀嚼肌
是否對稱 角膜反射
< 五進七出 > Corneal reflex: +/+
V1
V2
V3
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Left
Peripheral facial palsy
額頭皺紋
用力閉眼
展示牙齒
Right
Central facial palsy
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IX, X 嘔吐反射
Gag reflex +/+ Soft palate elevation
XI SCM, trapezius muscle
XII Tongue protruding
R’t
R’t
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Respiratory patterns
Ondine’s Curse
(Biot)
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Brainstem reflex 腦幹反射 中腦
Pupil size, Light reflex 橋腦
Corneal reflex Doll’s eye sign
延腦 Breathing Cardiovascular center
Tentorium
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A coma patient with right hemiplegia
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Babinski sign
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血液檢查 CBC/DC, Biochemistry, ABG, drug penal…
EEG Disappearance of alpha rhythm Slow waves Triphasic waves Diffuse epileptiform discharge “Alpha coma”
影像學檢查 對於顱內出血的病灶 CT 優於 MRI 對於後顱窩的病灶 MRI 優於 CT
實驗室與診斷檢查
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處置 治療相關致病因素 維持正常生命徵象 依需求補充體液電解質 低劑量的精神安定劑 非藥物處置
限制日間睡眠 / 增加日光照射時間 / 安排適當活動 視需要給予適當之約束 幻覺之護理:一對一照顧,環境要單純 溝通簡短扼要,重複提供現實導向 Environmental modification Soft lighting, music, elimination of stressful stimuli.
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Confusion - Cases discussion
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Case 1 81 y/o female No systemic disease, ADL independent 2 days ago, woke up in AM 4:00 as usual Felt mild general discomfort, but still walk t
o the market Couldn’t find the way to the market Walked “home” again Family found her on the way to the old hous
e, and the patient was mild dull in response; couldn’t hold the bowel well by left hand
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Conscious clear PE: normal NE
JOMAC: intact Left homonymous hemianopia (inferior domi
nant) DSS: Left hemineglect Left hemiparesis (5-)
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Right parietal infarct (MCA infarct)
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Case 2 67 y/o male, with history of DM, H/T and G
U Baseline: ADL independent, but seems bec
ame forgetful in recent 2-3 years Low back pain for 1 month, Tx in LMDs 3 days ago, the p’t developed bizarre beh
avior, worse in nights 說有朋友來拜訪 ( 朋友其實已往生 ) 說有小孩子在旁邊玩 吃衛生紙
No headache, no fever No dysarthria, dysphagia, diplopia
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Vital signs: BP: 150/90 mmHg, T/P/R: 36.9/75/18
PE normal NE
Sleepy Conscious: E3V4M5-6
Orientation to person: 經提示後問了好幾次才答對 , orientation to time OK, to place: fail
Cranial nerves: normal Mild right limbs spasticity MP, sensory & coordination: fair
Lab: not contributory
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Multiple small old infarcts with white matter change and mild brain atrophy
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Suspect drug-induced delirium OBS Conscious level improved gradually Less visual hallucination
5 days after admission Vital sign normal Conscious: E4V5M6 Orientation to time, person, place OK 跟醫生說昨天晚上很累 , 因為和兒子去郵局辦事 ,
碰到警匪槍戰 , 一直在躲流彈
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Lab WBC 10.1 K/ mm3, seg 90% Biochemistry normal U/A WBC 13-15, nitrate(+), bacteria(++)
Fever up to 39ºC that night U/C, B/C : E. coli
Cognition return to baseline 2 days after antibiotics treatment
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Thanks For Your Thanks For Your Attention ~Attention ~