SleepStrip

1
SleepStrip
Test yourself for Sleep Apnea in the comfort of
your own home.
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Results of Sleep Apnea

• Social problems
• Mental capacity effected
• Damage to blood vessels
• Heart damage
• Contributing factor in Impotence, Diabetes and
  many other disorders
• Road/work safety

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Sleep respiratory disorders

• Sleep apnea
• Obstructive
• Central
• Mixed
• Snoring
• Hypopnea
• UARS
• 10 of the general population are effected !

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Sleep apnea treatment

• Continuous Positive Airways Pressure
• Fixed
• Automatic
• BPAP
• Surgery
• Somnoplasty
• Repose
• Oral device

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The SleepStrip
2 Thermal sensors for nose flow
CPU and electronics
Indicator light
Miniature 3V lithium battery
Permanent electro-chemical display
1Thermal sensor for oral flow
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How SleepStrip scores an event

• X lt50 - hypopnea
• X lt10 - Apnea

Apnea complete stop of flow for more than 10
seconds Hypopnea Partial block of flow for more
than 10 seconds AHI (RDI) Apnea/Hypopnea Index
average number of total events per hour of sleep
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SleepStrip readout
Healthy subject less than 15 events per hour
Mild Sleep Apnea 15 to 24 events per hour
Mild Sleep Apnea 25 to 39 events per hour
Severe Sleep Apnea more than 40 events per hour
Error too short study or other problems.
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SleepStrip operation

• Must clean display before study for good
  readability
• Activated by attaching green sticker on display,
  light ON to mark proper activation
• During first 20 minutes, light flashes with each
  breath, normal respiration calibrated (assume
  patient still awake)
• After 20 minutes flashing stops and actual study
  begins (assume patient is already asleep)
• Must be on face at least 4.5 hours for a valid
  study
• When removed, long apnea signals end of study
  and light will turn ON
• After 30 minutes display can be read after
  removing the green sticker, do not remove sticker
  sooner

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SleepStrip Operating instructions
Clean display area
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SleepStrip study
Remove green sticker Read score
Attach green sticker Activation
After 20 Automatically begin study
Remove from face
First 20 measure normal flow
At least 4 hours count apneas and
hyponeas measure time
Last 30 Calculate AHI activate display
AHIlt15
15AHIlt25
25AHIlt40
40AHI
Short study or low flow error
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SleepStrip performance
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SleepStrip accuracy

• Basic accuracy1
• For moderate SAS (indicated as at least mild SAS)
  gt81
• For Severe SAS (indicated as at least mild
  SAS) gt98
• Correlation with Sleep lab AHI score 0.8 (valid
  studies)
• ROC AUC 0.92 (AHIgt40)

1 The SleepStripTM an apnoea screener for the
early detection of sleep apnoea syndrome
T. Shochat, N. Hadas, M. Kerkhofs, A.
Herchuelz, T. Penzel, J.H. Peter, P. Laviez
Eur Respir J 2002 19 121126 European
Respiratory Journal