Emer O’HareM.E. Biomedical Engineering

B.E. Electronic Engineering

Overview:My Sleep LearningsSleep MeasurementSleep ApneaSleep differences

My Sleep Learnings:Pre-sleep food/drink Changes in body

temperature

National Centre of Sleep Disorders Research (USA)

PolysomnographyAdvantages Disadvantage

sVery accurate

Multiple measures

Detailed analysis

Clinical practice

Supervision required (Expensive)

Intrusive

Human scoring (subjective)

Typically one night (no trends)

paradisesleep.com

Sleep Stages:Stage PSG OtherWake • EEG low

voltage, fast and random

• EEG Beta/Alpha waves

• Active limb/torso movement

• Variation in breathing and heart rate

Light Sleep

• EEG theta waves

• EEG Sleep spindles and K complexes

• Reduced limb/torso movement

• Reduced variation in breathing and heart rate

Deep Sleep

• EEG Delta waves

• No limb/torso movement

• Very regular and slower breathing and heart rate

REM • EEG low voltage, fast and sawtooth waves

• EOG movement

• No limb/torso movement

• Variation in breathing and heart rate

http://www.slideshare.net/ashrafeladawy/sleep-disordered-breathing

Sleep Apnea:Pickwickian Syndrome (1836) Obstructive Sleep Apnea

Sleep Apnea Diagram from msunites.com

Obstructive Sleep Apnea:Clinical thresholds:

http://www.slideshare.net/ashrafeladawy/sleep-disordered-breathing

AHI Value Category<5 Normal5-15 mild15-30 moderate>30 severe

Sleep DifferencesSleep duration: Sleep and age

2007, Loughborough Sleep Research Centre on-line sleep survey (Professor Jim Horne)

http://sleepdisorders.sleepfoundation.org

Thanks