Upload
john-xxx
View
2.346
Download
0
Tags:
Embed Size (px)
Citation preview
DeliriumDementia
Organic Amnestic SyndromeOther Organic Mental Disorders
Organic – due to Primary Brain Pathology
Secondary Brain Dysfunction to Systemic DiseaseSuspicion of organic mental disorder : 1.
First Episode 2. Sudden Onset 3. Older Age at onset 4. Hx of Drug/Alcohol abuse 5. Concurrent medical/neurological problem 6. Neurological signs: Seizures, LOC, Head injury, sensory motor deficit. 7. Presence of Confusion/Disorientation 8. Presence of visual and non auditory (olfactory, gustatory, tactile) hallucinations
A. DELIRIUMA. DELIRIUMCommonest organic mental disorderDefinition: Acute organic brain syndrome
characterized by clouding of consciousness and disorientation develops over a brief period and remits immediately once offending cause is removed.
Epidemiology: - 5 to 15% of medical & surgical px; - High in post op patients; - 40-50% recovering from hip surgery; - Highest rate in post cardiotomy patients; - 30% in ICU
Clinical Features1. Acute2. Clouding of conciousness3. Disorientation (mostly time,
severe cases place and person)4. Short attention
span/distractibility5. Perceptual Distortion6. Disturbance in sleep wake
cycle
DECREASE AWARENESS TO SURROUNDINGDECREASE ABILITY TO RESPOND TO ENVIRONMENTAL STIMULI
ILLUSIONSHALLUCINATIONS Mostly Visual
INSOMNIADAY TIME SLEEPINESS
7. Sun Downing – six in evening8. New Memory Impairement Relatively intact remote memory
9. Speech 10.Mood – Fear, anger rage11.Delusions – Fleeting and fragmentary12.Neuro: Tremors, Dysphasia, Urinary
incontinence
IMPAIRED IMMEDIATE RECALLIMPAIRED RECENT MEMORY
SLURRING of SPEECHINCOHERANCE
Predisposing FactorsOld agePre existing brain damage/dementiaPast history of deliriumAlcohol /drug dependenceChronic Medical illnessSurgical proceduresHistory of Head Injury
Organic ETIOLOGY of DeliriumCLASS ETIOLOGY
METABOLIC Hypoxia, Anemia, Electrolyte disturbance, Hepatic&Uremic Encephalopathy, Cardiac failure,arrest,arrythmia, Hypoglycemia, Metabolic acidosis&alkalosis, Shock
ENDOCRINAL Pituitary, Thyroid, Parathyroid, Adrenal dysfunctions
DRUG/SUBSTANCE
(Many) including alcohol, benzodiazepines, anticholinergics, psychotropics, lithium, AntiHPT, diuretics, anticonvulsant, digoxin, heavy metals, Insulin, salicylates
NUTRITIONAL DEFICIENCIES
Thiamine, Niacine, Pyridoxine, Folic Acid
INFECTIONS (ACUTE/CHRONIC) Septicemia, Pneumonia, Endocarditis, UTI, Meningitis, Encephalitis, Cellulitis
INTRACRANIAL Stroke, Post Ictal, Head Injury, Infections, Migraine, Focal abscess/neoplasms, Hypertensive Encephelopathy
MISCELLANEOUS
Post op, ICU, Sleep deprivation
Management of DeliriumIf cause not known – Do a battery of
investigations : CBC, Urinalysis, Blood glucose, Blood urea serum analysis, Liver and renal function test, arterial p02, Pco2, Thyroid function, B12, Folate levels, CSF, ECG, Drug screen,HIV, EEG, CT & MRI
Correct underlying cause – If underlying cause is found then it must be
treated immediately . For ex50mg of 50% IV dextrose for HYPOGLYCEMIA02 for HYPOXIAIV fluids for electrolyte imbalance
• Drugs given if patient is agitated (most are):– Small dose
BENZODIAZEPINES (Lorazepam, Diazepam)
– ANTIPSYCHOTIC (Haloperidol)
MAINTAIN WITH ORAL HALOPERIDOL, LORAZEPAM TILL RECOVERY IN 1 WEEK
REVIEW DOSE, TAPER AND STOP
DELIRIUM VS DEMENTIA
B. DEMENTIAB. DEMENTIA
• Definition: Chronic Mental Disorder characterized by impairment of intellectual functions, Impairment of memory and deterioration of personality with the course being progressive, stationary or reversible
CLINICAL FEATURESDuration: 6 monthsImpaired Intellectual functionsImpairement of memory (initially mild,
remote memory in later stage)Deterioration of personality with lack of
personal careNo conscious impairmentOrientation-usually normal but falls later
Aphasia – Difficulty in naming an objectHallucinations and Delusions
Additional:-- Emotional lability: Marked variable emotional expression- Catastrophic rxn: When asked to do something beyond her intellectual capibility, she goes into a rage
Types and causes Of DementiaTYPE CAUSES
Parenchymatous Brain Disease
Alzheimers Disease, Parkinson’s disease, Huntingtons’s Chorea, Pick’s Disease, Steel-Richardson syndrome (prog. Supranuclr palsy)
Vascular Dementia
Multiinfarct Dementia, Subcortical Vascular dementia (Binswanger’s disease)
Toxic Dementia
Alcohol, Drugs, Heavy Metals, Bromide, CO, Benzodiazepines, Psychotropics
Metabolic Dementia
Chronic hepatic/uremic encephalopathy, dialysis dementia, Wilson’s disease
Endocrinal Pituitary, Parathyrois, Thyroid, Adrenal dysfunction
Deficiency Dementia
Pernicious anemia, Pellagra, Folic acid, Thiamine deficiency
Infections AIDS, Neurosyphillis, Chronic Meningitis, Creutzfelft-Jacob disease
IOP ↑ Brain tumor, Headinjury hematoma, hydrocephalus Commonest: ALZHEIMERS DEMENTIA, MULTIINFARCT DEMENTIA, HYPOTHYROID DEMENTIA, AIDS DEMENTIA COMPLEX
ALZHEIMER’S DEMENTIAALZHEIMER’S DEMENTIAWomen, Genetic↓ neurotransmitter AcetylCholine due to
degeneration of cholinergic nuclei in basal forebrain
Drugs: Rivastigmine (1.5-6mg/day), Galantamine (4-12mg
BID) -> ↑Ach by slowing its degredationMemantine (5-20mg/day) -> N, Methyl D Aspartate
(NMDA) antagonistVitamin E
MULTI INFARCT DEMENTIAMULTI INFARCT DEMENTIA• Multiple cerebral infarcts causing
dementia due to underlying CVS problem
• Abrupt onset, Acute exacerbations, Step wise clinical deterioration, Fluctuating course
• Focal Neurological signs• Investigations: EEG (focal area of
slowing) CT brain (multiple infarct area)
• Treatment: Underlying (eg HPT)
TIAHPTCVS DISEASEPREVIOUS STROKE
AIDS DEMENTIA COMPLEXAIDS DEMENTIA COMPLEX50-70% patient of AIDSTriad of cognigtive, behavioral, motoric
deficits, -> subcortical dementiaVirus cross BBB -> Cognitive impairementIx ELISA, Western BlotCT may show cortical atrophy
MANAGEMENT OF DEMENTIABasic investigationsTreat underlying cause – mentionedSymptomatic management of anxiety,
depression, Psychotic symptomsEducation – Family, Financial, Support
groupsInstitutionalize in later stage
C. ORGANIC AMNESTIC C. ORGANIC AMNESTIC SYNDROMESYNDROME• Characterized by
– Memory impairment (anterograde, retrograde amnesia) due to an underlying organic cause.
– No impairment of global intellectual function,abstract thinking,personality.
• Caused by Thiamine deficiency in alcohol dependence as part of Wernicke Korsakoff Syndrome
• Any other lesions involving bilaterally the inner core of limbic system(i.e mammillary bodies,fornix,hippocampus, medial temporal lobe,)
The Lesions include: Head traumaSurgical procedureHypoxiaPosterior cerebral artery strokeHerpes simplex encephalitis
Management
Treat the underlying cause if treatable.Ususally treatment is of not much help,except in prevention of further deterioration and the prognosis is poor
D. Other Organic Mental DisordersD. Other Organic Mental DisordersOrganic HallucinosisOrganic Catatonic DisorderOrganic Delusional (Schizo like) disorderOrganic Personality Disorder
Organic Hallucinosis
Etiology:Drugs:Hallucinogens,cocaine,cannabis,bromi
de)Alcohol:In alcoholic hallucinosis,auditory
hallucinations are more commonMigraineEpilepsy: Complex partial seizuresBrain stem lesions
Persistant or recurrent hallucinations due to an underlying organic cause.
No major disruption of consciousness, intelligence or memory
Management 1)Treatment of the underlying cause if
treatable. 2) Symptomatic treatment with a low dose of
an anti-psychotic drug.
Organic Catatonic Disorder
Etiology:Neurologic disorders: limbic encephalitis,Surgical
procedures,sub dural hematoma,cerebral malariaSystemic and metabolic disorders : Diabetic
ketoacidosis , pellagra, SLE, Hepatic encephalopathy
Drugs and poisoning: Organic alkoloids ,aspirin,lithium poisoning ,ethyl alcohol , co
Psychiatric disorders : manic stupor , periodic catatonia , reactive psychosis ,schizophrenia
Management
Treatment of underlying causeSymptomatic treatment with low doses of
benzodiazipam or an anti-psychotic or electro convulsive therapy.
Organic delusional disorderPredominant delusions which are persistant
or recurrent ,caused by an underlying organic cause.
No major disturbance of consciousness,orientation , memory or mood.
Etiology:Drugs:Amphetamines,cannabis,disulfimesSpino cerebellar degeneration Complex partial seizures
ManagementTreatment of underlying causeSymptomatic treatment with low doses of
benzodiazipam or an anti-psychotic or electro convulsive therapy.