Sleep in the ICU Sleep in the ICU The Next Delirium Frontier? The Next Delirium Frontier? Paula L. Watson, M.D. Paula L. Watson, M.D. Assistant Professor Assistant Professor Pulmonary/Critical Care/Sleep Medicine Pulmonary/Critical Care/Sleep Medicine Vanderbilt University Medical Center Vanderbilt University Medical Center NIH AG027472-01A1, VA-GRECC,CTSA 1 UL1 RR024975, ASPECT
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Sleep in the ICUSleep in the ICUThe Next Delirium Frontier?The Next Delirium Frontier?
Paula L. Watson, M.D.Paula L. Watson, M.D.
Assistant ProfessorAssistant Professor
Pulmonary/Critical Care/Sleep MedicinePulmonary/Critical Care/Sleep Medicine
Vanderbilt University Medical CenterVanderbilt University Medical Center
Inouye, JAMA 1996;275:852-57Dubois, Intens Care Med 2001;27:1297-1304Inouye, NEJM 1999;340:669-676Jacobi, Crit Care Med 2002;30:119-141 Vaurio, Anesth Analg 2006; 102:1267-1273Milbrandt, Crit Care Med. 2005;33:226-9
Perception of problems during Perception of problems during ICU stayICU stay
Pain relief Pain relief problemsproblems
94%94%
AnxietyAnxiety 62%62%
Sleep Sleep deprivationdeprivation
61%61%
Simini, Lancet 1999;354:571-572
Characteristics of Sleep in the ICUCharacteristics of Sleep in the ICU
Severely fragmented Severely fragmented
–– (>80 arousals/ hour)(>80 arousals/ hour)
Increased stage 1Increased stage 1
Decreased or absent Decreased or absent Slow Wave & REMSlow Wave & REMSlow Wave & REMSlow Wave & REM
Distributed over day Distributed over day and nightand night
Aurell et al., BMJ 1985;290:1029-32
Cooper et al., Chest 2000;117:809-18
Orr et al., Am J Card 1977;39:196-201
Freedman et al., AJRCCM 2001;163:451-7
Sleep Deprivation
DeliriumDelirium
Sleep Deprivation and DeliriumSleep Deprivation and DeliriumCommon Neurocognitive TraitsCommon Neurocognitive Traits
InattentionInattention
Fluctuating mental statusFluctuating mental status
Altered level of consciousnessAltered level of consciousnessAltered level of consciousnessAltered level of consciousness
The Psychosis of Sleep DeprivationThe Psychosis of Sleep DeprivationCase reports of Case reports of hallucinations and hallucinations and persecutory delusionspersecutory delusions
On the 4On the 4thth and 5and 5thth day, he day, he began to experience began to experience began to experience began to experience “waking dreams”“waking dreams”
Heightened Heightened suspiciousness, feeling of suspiciousness, feeling of resentmentresentment
Patrick & Gilbert, Psychol Rev 1896;3:469-83 Katz & Landis, Arch Neurol Psychiat 1935;34:307-16 Luby et al., Psychosom Med 1960;22:182-92 West, Ann NY Acad Sci 1962;96:66-70 Gulevich & Dement Arch Gen Psychiat 1966;15:29-35
Randy Gardner, 264 hours
Sleep Deprivation Preferentially Sleep Deprivation Preferentially Affects the PreAffects the Pre--frontal Cortexfrontal Cortex
Espana & Scammell, Sleep 2004;27:811-20Trzepacz, Sem Clin Neuropsych 2000;5:132-48Camarini, Braz J Med Biol Res 1997;30:641-47Ebert, Adv Biol Psych 1998;153-69
Cholinergic
deficiency
Investigating the relationship of Investigating the relationship of sleep deprivation and ICU deliriumsleep deprivation and ICU delirium
Sleep Deprivation and ICU DeliriumSleep Deprivation and ICU Delirium
25
30
35
40
45
50
% Patients Mental Status
0
5
10
15
20
25
None Moderate Severe
Mental Status Changes
Helton et al., Heart & Lung 1980;9:464-68
Severity of Sleep Deprivation
N = 62
Sleep disturbances associated with Sleep disturbances associated with deliriumdelirium
ICU patients with delirium:ICU patients with delirium:–– Longer REM latencyLonger REM latency
–– Shorter REM durationShorter REM duration
–– Fewer REM periodsFewer REM periodsTrompeo, Ranieri, 2005 Int Care Med Abstract
Study designed to investigate sleep quality Study designed to investigate sleep quality on noninvasive ventilation failureon noninvasive ventilation failure
–– circadian abnormalities, circadian abnormalities, ↓↓ REM associated REM associated with development of deliriumwith development of delirium
Trompeo, Ranieri, 2005 Int Care Med Abstract
Campo, Brochard, Crit Care Med 2010;38
Measuring Sleep in the ICUMeasuring Sleep in the ICU
Polysomnography:Polysomnography:
–– Labor intensiveLabor intensive
–– ExpenseExpense
–– Difficulty interpretingDifficulty interpreting
MedicationsMedications
Metabolic effectsMetabolic effects
DeliriumDelirium
Decreased Spindles & K complexesDecreased Spindles & K complexes
Effect of primary illness or sedatives/analgesics?
Scored as stage 1 due to lack of Spindles and K-complexes
EEG findings in the critically illEEG findings in the critically ill
Polymorphic delta
Burst suppression
Isoelectric
The EEG and DeliriumThe EEG and Delirium
RASS -2, CAM-ICU +
Consent to show full photo provided by patient
Delta waves
Approach to Scoring in ICU PatientsApproach to Scoring in ICU Patients
Assess Behavioral Sleep State
WakeSleep
Wake
Assess Sleep Stage Using Revised PSG
Criteria
Watson & Gehlbach -manuscript in progress
AtypicalClassic
Sedatives in Sleep & DeliriumSedatives in Sleep & Delirium
Sedation Sedation ≠ Sleep≠ Sleep
SleepSleepEssential biologic functionEssential biologic functionEasily reversed by stimuliEasily reversed by stimuliCircadian rhythmCircadian rhythmCyclic progression of Cyclic progression of sleep stagessleep stages
Weinhouse & Watson, Crit Care Clinics 2009;25:539-49
RASS -5 (unresponsive)
Lorazepam and Midazolam are associated Lorazepam and Midazolam are associated with increased risk of deliriumwith increased risk of delirium
Delirium Risk- lorazepam
Pandharipande et al., Anesthesiology 2006;104:21-6
Pandharipande et al., J Trauma 2008;65(1):34-41
Benzodiazepines and the EEGBenzodiazepines and the EEG
Normal
Stage 2
Sleep
Benzodiazepines and opioids suppress REM and Slow Benzodiazepines and opioids suppress REM and Slow Wave Sleep.Wave Sleep.Does sedation deprive patients of true sleep?Does sedation deprive patients of true sleep?What restorative benefits of natural sleep are provided by What restorative benefits of natural sleep are provided by sedation? sedation?
lorazepam
Bourne and Mills, Anaesthesia 2004;59:374-84Kuehn, JAMA 2006;296:2427-2428Tung et al., Anesthesiology 2004;100:1419-26
Benzodiazepine & propofol - GABA receptor in ventrolateral preoptic nucleus
Dexmedetomidine –α2adrenoreceptor in the locus coerulus
Nelson et al., Nature 2002;5:979-84
Nelson et al, Anesthes 2003;98:428-36
DexmedetomidineDexmedetomidine
Properties similar to natural sleepProperties similar to natural sleep
–– Clinically sedated but arousableClinically sedated but arousable
EEG activity similar to stage 2 sleepEEG activity similar to stage 2 sleep
Nelson, Maze et al., Anesthesiology 2003;98:428-36
Huupponen et al., Acta Anaesthesiol Scand 2008; 52:289-94
Mason et al., Pediatric Anesthesia 2009;19:1175-83
Daily Prevalence of DeliriumDaily Prevalence of Delirium
Prevalence of delirium similar prior to starting study drugPrevalence of delirium similar prior to starting study drug
Dexmedetomidine resulted in 24.9% Dexmedetomidine resulted in 24.9% ↓ in delirium during in delirium during
treatment phase (54% dex vs. 76.6% mdz)treatment phase (54% dex vs. 76.6% mdz)
Riker et al., Riker et al., JAMAJAMA 2009;301(5):4892009;301(5):489--9999
SummarySummary
Sleep deprivation and deliriumSleep deprivation and delirium
Investigating the relationship of sleep Investigating the relationship of sleep Investigating the relationship of sleep Investigating the relationship of sleep deprivation and ICU deliriumdeprivation and ICU delirium
–– measuring sleep, not an easy taskmeasuring sleep, not an easy task
Sleep and sedationSleep and sedation
–– not the same and not equalnot the same and not equal
Is sleep deprivation a cause of ICU Is sleep deprivation a cause of ICU delirium?delirium?
Does sleep deprivation lower the Does sleep deprivation lower the Does sleep deprivation lower the Does sleep deprivation lower the threshold for developing delirium?threshold for developing delirium?
Does sedation provide benefits of Does sedation provide benefits of natural sleep?natural sleep?
Memories of Critical CareMemories of Critical Care
“I have memories of jumbled “I have memories of jumbled thoughts…..it was thoughts…..it was petrifying. I could hardly petrifying. I could hardly tell what was real and tell what was real and tell what was real and tell what was real and what wasn’t. This sounds what wasn’t. This sounds like some kind of a novel like some kind of a novel doesn’t it? Was I doesn’t it? Was I dreaming it all?”dreaming it all?”
Cox et al., Crit Care Med 2009;37:2702-2708Illustration by Steven Stahlberg
The Psychosis of Sleep DeprivationThe Psychosis of Sleep Deprivation
Case reports of Case reports of hallucinations and hallucinations and persecutory delusionspersecutory delusions
“inevitable” if sleep “inevitable” if sleep deprivation continued deprivation continued longer than 100 hourslonger than 100 hours
Randy Gardner Randy Gardner Case of Prolonged (264 hrs) WakefulnessCase of Prolonged (264 hrs) Wakefulness
On the 4On the 4thth and 5and 5thth day, he day, he began to experience “waking began to experience “waking dreams”dreams”Heightened suspiciousness, Heightened suspiciousness, feeling of resentmentfeeling of resentment