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CPAP Remote Alarm System BME 272: Oral Report Two

Develop a remote alarm system to alert parents when their child's CPAP machine fails, ensuring proper treatment for obstructive sleep apnea. Improve compliance, prevent complications, and provide peace of mind.

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CPAP Remote Alarm System BME 272: Oral Report Two

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  1. CPAP Remote Alarm SystemBME 272: Oral Report Two Group 15 Kathleen Grunder Jessica Paulsen Molly Rice

  2. Project Advisor Dr. Roberta Leu - Clinical Instructor in the Sleep Disorders Division of Neurology, Vanderbilt University Academic Advisor Dr. Paul King - Professor of Biomedical Engineering Emeritus, Professor of Mechanical Engineering Emeritus

  3. Background Information Obstructive Sleep Apnea Most common form of sleep disorder breathing Results in partial or complete collapse of the upper airway Can lead to sleep deprivation, arrhythmia, high blood pressure, heart disease, stroke, or death Constant Positive Airway Pressure (CPAP) Therapy  Used to treat sleep apnea  Holds airway open with continuous flow of air  Effective when used correctly

  4. Analysis Problem Statement Continuous Positive Airway Pressure (CPAP) machine masks often slip off during the night; this can be especially dangerous for children, who are not compliant with wearing the mask

  5. AnalysisPerformance Criteria There is currently no alarm to alert parents when their child's CPAP machine has failed "I'm very nervous about knowing when [the mask] comes off because I realize how important it is to keep [my son's] airway open." - Parent of a Child with Sleep Apnea

  6. AnalysisPrimary Objective To develop a remote alarm system to wake parents when their child’s CPAP machine has failed

  7. AnalysisFailure Modes • Source power failure • Disconnected power cord • Internal machine failure • Mask displacement • Mask removal • Hose disconnection • From mask • From machine • Kinked hose • Punctured hose

  8. HypothesisSolution Description To use an airflow sensor to determine when the airflow is outside a determined range indicating that one of the failure modes has occurred May consider other sensors CO2 Concentration Pressure

  9. HypothesisGoals To improve pediatric compliance with CPAP masks To prevent complications from apneas that can occur when the machine fails To alert parents when the machine fails To provide parents with comfort in knowing that the machine is working properly

  10. HypothesisFactors The circuit components and complexity will most affect cost, accuracy, and quality

  11. HypothesisPerformance Metrics Sensitivity measurements How often does the machine sound when the mask is off? Functionality Does the alarm go off when the mask is off? Compliance Do parents and children use the alarm? Cost/Benefit Is the benefit worth the cost of the alarm? Alarm Volume Does the alarm wake up the parents? Receiver Range Can the reciever get the signal all over a house?

  12. ProgressCurrent Status Met with sales representatives from ResMed, a CPAP manufacturer Obtained CPAP machine and three masks from ResMed Patent search Literature review Failure analysis Consultation with Dr. Galloway 

  13. ProgressFuture Work Contact Dr. Kirby Pate Design airflow sensor Buy system components Begin building and testing

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