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ACUTE CONFUSION IN THE ELDERLY. Dr. Barbara Power April, 2010. Major Objectives. Describe common causes of delirium Recognize risk factors, and means of prevention of delirium Work up and treatment of delirium when it does occur, and management of behavioral problems.

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acute confusion in the elderly


Dr. Barbara Power

April, 2010

major objectives
Major Objectives
  • Describe common causes of delirium
  • Recognize risk factors, and means of prevention of delirium
  • Work up and treatment of delirium when it does occur, and management of behavioral problems
synonyms for delirium
Acute confusional state

Organic brain syndrome

Toxic/metabolic encephalopathy

Out of it


Synonyms for Delirium
epidemiology in elderly
Epidemiology in Elderly

Prevalence :

  • On Admission 10 - 30%
  • ER 10 -18%


  • In Hospital 10 - 56%
  • Post-operatively 15 - 53%
  • Cardiac Surgery 17 - 73%
  • ICU 70 - 87%
so what why is delirium important
So What?Why is Delirium Important?

3 criteria:

Common, Morbidity & Costly!

  • Death ~20-35%
  • Cognitive drop in 40%
  • Premature institutionalization
  • on admit? 15-24%
  • in hospital?14-31%
  • Ortho? 25-65%
  • ICU: 70%!
  • LOS doubles
  • ++ hospital $
  • Caregiver burden
recognition of delirium
Recognition of Delirium
  • Previous studies 32%-66% of cases unrecognized by MD’s
  • Yale- New Haven study
    • 65% unrecognized by Physicians
    • 43 % unrecognized by nurses
case delirium
Case - Delirium

Mrs G. 79 year old lady

  • lives alone, manages own apartment
  • slightly forgetful (according to daughter)
  • PMed Hx: HTN; Insomnia
  • Meds:
    • Hydrochlorothiazide 25 mg OD
    • Amitriptyline 50 mg qhs
    • Oxazepam 15-30 mg qhs
    • Occasional alcohol use
case delirium1
Case - Delirium

Admisssion to Hospital

  • Tripped on rug, sustained a hip fracture
  • Brought to hospital. Spends 12 hours in ER waiting for bed
  • What are the risk factors that make Mrs. F vulnerable to developing delirium?
  • Suggest actions that could be initiated to reduce her risk of developing delirium
case delirium2
Case - Delirium

Admisssion to Hospital

  • ORIF the following day
  • 1st POD
    • climbing over bedrails
    • shouting all night
    • sleeping in day
    • pulling out her IV’s
  • What are the key features of delirium that the MD should elicit in Mrs. G?
The First Question –What is this?

Is this Delirium?


Or something else???



All Confusion is

Not Dementia

Always Consider




  • Definition:
  • a disturbance of consciousness with inattention that develops over a short time & fluctuates
delirium dsm iv
Delirium (DSM-IV)

A: Disturbance of consciousness(reduced clarity of

awareness of the environment) with reduced ability to focus,

sustain or shift attention

B: Change in cognition (eg. memory deficit, disorientation,

language disturbance) or development of a perceptual

disturbance not due to pre-existing, established or

developing dementia

C: The disturbance develops over a short period of time

(hours to days) and tends to fluctuate during the course of

the day.

D. Evidence of aetiology

delirium versus dementia






Hallucinations common



Memory disturbance




Hallucinations common only in advanced disease

Delirium versus Dementia?

It is common for Delirium to be superimposed on Dementia!


Confusion Assessment Method (CAM)

      • 1. History of acute onset of change in patient’s normal mental status & fluctuating course?
  • AND
      • Lack of attention?
      • 3. Disorganized thinking?
      • Altered Level of Consciousness?

Sensitivity: 94-100%

Specificity: 90-95%

Kappa: 0.81

Inouye SK: Ann Intern Med 1990;113(12):941-8

Arch Intern Med. 1995; 155:301

testing attention
Testing Attention
  • Formal methods:
    • MMSE: Serial 7’s, WORLD backwards
    • Digit Span: 5 forwards, 4 backwards
    • Days of Week, Months of Year backwards
  • Affects all other areas of cognition
delirium cognitive evaluation
Delirium: Cognitive Evaluation
  • MMSE:
    • inaccurate tool to diagnose delirium as the patient:
      • fluctuates
      • has poor attention/concentration
    • helpful tool to demonstrate improvement in cognitive status when following patient.
psychomotor variants of delirium
Psychomotor Variants of Delirium :
  • Hyperactive("wild man!"); 25%
  • Hypoactive ("out of it!“, “pleasantly confused”); 50% - Individuals often not recognized as they may not cause a disturbance so they don’t get ATTENTION
  • Mixed delirium (features of both), with reversal of normal day-night cycle (“sundowning”)
case delirium cam
Case – Delirium: CAM
  • Acute /Fluctuating Course
  • Altered level of Consciousness
  • Inattention
  • Disorganized Thinking

9 am

1 pm

top 4 independent risk factors for delirium
Top 4 Independent Risk Factors for Delirium

Vision impairment:

RR=3.5 (1.2-10.7)

Any severe illness:

RR=3.5 (1.5-8.2)

Cognitive impairment: RR=2.8 (1.2-6.7)

High Urea/Creatinine:

RR= 2.0 (0.9-4.6)

Inouye S. Ann Intern Med 1993: 119-474

what causes delirium inouye delirium model
What causes delirium:Inouye Delirium Model

Frail 89 y.o. with baseline dementia

Fit 65 y.o. who plays senior’s hockey

Minimal precipitant needed

Strong or repeated precipitant needed

Added Independent PrecipitatingFactors in Hospital For Delirium(i.e.. bad things WE do to elderly patients):
  • Restraints (RR 4.4)
  • NPO status (RR 4.0)
  • 3+ new med/24 hr (RR 2.9)
  • Foley catheter (RR 2.4)
  • Any iatrogenic event (RR 1.9)

Inouye SK, Charpentier PA, Precipitating Factors for Delirium in Hospitalized Elderly Persons. JAMA. 1996;275:852-857

causes of delirium
Causes of Delirium?
  • brain’s way of demonstrating “acute organ dysfunction”
  • Anything that hurts the brain or impairs its proper functioning can provoke a delirium!
i watch death mnemonic
IInfection:   Most common are pneumonias & UTI in elderly, but sepsis, cellulitis, SBE and meningitis can also occurI WATCH DEATHMnemonic
i watch death
I  Infection 

WWithdrawal:benzodiazapines, ETOH,

i watch death1
I  Infection 

W  Withdrawal

AAcute metabolic: electrolytes, renal failure, acid-base disorders, abnormal glycemic control, Calcium

i watch death2
I  Infection 

W  Withdrawal

A  Acute metabolic

TTrauma: head injury (SDH, SAH), pain, vertebral or hip fracture, urinary retention, fecal impaction

i watch death3
I  Infection 

W  Withdrawal

A  Acute metabolic

T Trauma

C  CNS pathology

HHypoxia from COPD exacerbation, CHF

medication review
Medication review:
  • Look at all prescriptions
  • include PRNs, regular, ETOH and OTC meds
  • Ask if anything has been added, changed or stopped
  • Watch for sleeping meds ie Gravol; Nytol,
miscellaneous causes of delirium
Miscellaneous Causes of Delirium
  • Pain
  • Fecal Impaction
  • Urinary Retention
in other words anything that makes an older person very very sick
In other words, anything that makes an older person veryvery sick…

…can cause a delirium in a vulnerable older person!

delirium workup
Delirium Workup
  • On History:
    • time course of mental status changes?
    • association with other events (i.e.. meds, illness)?
    • Pre-existing impairments of cognition or sensory modalities?
physical exam
Physical Exam
  • Vitals: normal range of BP, HR Spo2, Temp?
  • Good physical exam: particular emphasis on Cardiac, pulmonary and neurologic systems
  • Hydration status ? (dry axilla=dehyd!; + LR ~3)
  • Also rule out
    • fecal impaction (DRE)
    • urinary retention (bladder U/S, in-and-out catheter)
    • Infected decubatis ulcer
delirium workup lab testing
Delirium workup: Lab testing
  • Basic labs most helpful!
    • CBC, lytes, BUN/Cr, glucose
    • TSH, B-12, LFTs Calcium, & albumin
  • Infection workup (Urinalysis, CXR) +/- blood cultures
  • Other investigations based on Hx- EKG/CT Scan/Drug levels
case delirium3
Case - Delirium

Admisssion to Hospital

  • ORIF the following day
  • 1st POD
    • climbing over bedrails
    • shouting all night
    • sleeping in day
    • pulling out her IV’s
  • What are the main immediate treatments you would initiate?
helping to improve delirium
Helping to improve Delirium

Once it starts, needs to ride its course; but you can make a difference!

delirium reduction
Delirium Reduction:
  • You can get improvement of delirium with such simple measures as:
    • Glasses
    • Using hearing aids
    • Fluids/nutrition
    • reducing noise
    • Early mobility
    • Familiar faces

S Inouye A multicomponent intervention to prevent delirium in hospitalized older patients.N Engl J Med. 1999 Mar 4;340(9):669-76.

can we prevent of delirium
Can We Prevent of Delirium
  • Multi component intervention strategy targeted to 6 delirium risk factors

Ref: Inouye SK, NEJM. 1999;340:669-676

yale delirium prevention trial risk factors intervention
Yale Delirium Prevention TrialRisk Factors Intervention

Cognitive Impairment Reality orientation / therapeutic activities program

Vision/Hearing impairment Vision / hearing aids / adaptive equipment

Immobilization Early mobilization / Reduce immobilizing equipment

Psychoactive medication Non pharmacologic approaches to sleep / anxiety / Restricted use of sleeping medication

Dehydration Early recognition / Volume expansion

Sleep deprivation Noise reduction strategies/sleep enhancement program

Ref: Inouye SK, NEJM. 1999;340:669-676

yale delirium prevention trial significance
Yale Delirium Prevention TrialSignificance
  • Practical intervention towards evidence based risk factors
  • Significant reduction in risk of delirium

( 9.9% in intervention group vs 15% in usual care)

  • Significant reduction in total delirium days
pharmacological rx goals
Pharmacological Rx: Goals
  • Reverse psychotic signs and symptoms
  • stop dangerous or potentially dangerous behavior
  • To calm the patient sufficiently to conduct the necessary evaluation and treatment
drug treatment of agitation
Drug Treatment of Agitation
  • Only 4 RCTs (largest N=73):
    • Neuroleptics preferable to benzodiazepines in most cases (except: PD, DLBD, ETOH)
    • Low dose high potency neuroleptics (e.g., starting at haloperidol 0.25-1 mg)
    • Newer “atypical” agents: no better than haloperidol
  • Avoid Combination Drugs – SINGLE Drug is better

Lacasse et. al., Ann Pharm, 2006

if severe agitation consider rx w high potency antipsychotic
IF SEVERE AGITATION consider Rx w/ high potency antipsychotic:
  • Haloperidol: po/IM/(IV short acting):
    • start with 0.5 - 1 mg initial dose
    • Repeat dose of 0.25-0.5 mg Q30 minutes if patient remains unmanageable without adverse events until sedation achieved and continue monitoring
    • repeat cycle until acceptable response or adverse events occur
    • max suggested Haldol dose in frail elderly 3-4mg/24 hr
  • Maintenance: 50% loading dose in divided doses over next 24 hrs
  • Taper the dose as soon as possible
  • Avoid in individuals with Parkinson’s Disease

1. Avoid use in combination with antipsychotics - SINGLE drug is better.

2. May cause distribution/increased agitation.

3. Best reserved for Delirium 2o to alcohol / Benzodiazepine withdrawal.

4. Relatively contraindicated in Delirium from Hepatic Encephalopathy.

summary recognition of delirium
Summary - Recognition of Delirium
  • Delirium is Common
  • Yale- New Haven study
    • 65% of cases unrecognized by Physicians
  • Don’t be part of that group!