SIDS Intervention Device James R. Lawrence, III ▪ Chase Buckner ▪ Jacob King ▪ Shawn Campbell ▪ Steven Decker ▪ Mao Mao Yu North Carolina State University Department of Biomedical Engineering Identifying a Medical Problem Mechanics of the Intervention Sole Housing Sudden Infant Death Syndrome (SIDS) kills an estimated 2,000 The Babinski Reflex infants a year in the United States. During a SIDS event, the infant Due to the unique nature of our approach to Elicited when the sole of foot is SIDS prevention, no piece was on the market to experiences apnea and hypoxia which ultimately lead to death. stimulated with force satisfy our needs. Therefore, we designed the There is no known cause for SIDS and thus no pharmacologic cure. Current medical devices on the market provide monitoring to detect Commonly tested at most physical piece pictured to the right to house the pulse the symptoms of SIDS and have an auditory alarm to alert nearby exams when a physician strokes the oximeter, solenoid, and Sun SPOT®. parents, but offer no action to disrupt the event and save infant life. bottom of the foot We used FDM Rapid Prototyping to fabricate To address this apparent need in the marketplace, our product the sole housing. The first step in EMT protocol to rouse features a monitoring device and an active intervention element. an unresponsive infant The ribs detailed in the picture were necessary DC Push Frame Solenoid Our device stimulates the Babinski to provide support and to eliminate excess reflex using a DC push frame solenoid material. Components of our Design connected to a wireless microcontroller. Pulse Oximeter sensor to detect infant vital signs Results Sun SPOT® Solenoid to elicit Babinski Reflex Because restrictive wires pose an obvious Proof of concept design risk to the infant, we chose a wireless Sun SPOT® Microcontroller to process signal from pulse oximeter microcontroller to monitor the infant’s status Bread board circuit and to fire as well as provide power to the solenoid. Functioning electrical circuit A Sun SPOT® microcontroller was donated Design history file to satisfy FDA Sole Housing to hold pulse oximeter, solenoid, and Sun SPOT® for learning purposes by Sun Microsystems. Quality System Regulations on the infant’s foot The Sun SPOT® contains not only wireless transmission capabilities, but also has the Pulse Oximetry Java based processing power needed to Used oscilloscope to detect calculate the SpO2 level and the battery pulsations Pulse Oximetry uses power output needed to fire the connected alternating red and infrared solenoid. Used basic pulse oximeter light shining through the skin Sun SPOT ® data processing algorithm to onto a photodiode to measure fire solenoid the oxygen content of hemoglobin in the blood. Most pulse oximeters shine Overall Electronic Design Next Steps through the finger as shown Process (1) Process (2) Process (3) Develop a more sophisticated pulse oximeter processing algorithm below. However, in the case of Pediatric Pulse Oximeter Miniaturize breadboard circuit onto a printed circuit board infants, the light waves can be Sensor in Action Filter/ Read Embed circuitry and pulse oximeter sensory system into a sock Sensor Sun SPOT® A/D Conversion shone through an entire Amplify Values that can be comfortably worn by an infant appendage as illustrated to the Process (4) Incorporate a wireless base station model to provide an auditory Process (6) right. No alarm to wake nearby parents For infants, the typical SpO2 Yes Calculate Infant Solenoid Intervention? SpO2 (blood oxygen level) value is 100% due to newly developed Process (5) Acknowledgements and undamaged vasculature. Process (1) – An operational amplifier receives the pulse oximeter signal and it is filtered through a 1 to 6 Hz band-pass filter. Dr. David Lalush, Project Sponsor In the event of an apneic Dr. Bart Greene, NCSU Dept. of Electrical & Computer Engineering episode, the oxygen content of Process (2) and (3) – The onboard A/D Converter on the Sun SPOT® converts pulse oximeter sensor Dr. Ola Harrysson, NCSU Dept. of Industrial & Systems Engineering the infant’s blood rapidly falls signal into a readable digital output. David Simmons, Sun Microsystems below normal levels. Process (4) and (5) – A Java program algorithm uses the real-time sensor signal to detect a SIDS Nancy J. Dulin, Carolinas Medical Center event. If no event is detected, the program continues to run and monitor the infant’s vital signs. Pulse Oximetry Operating Principle Andrew DiMeo, Senior Design Instructor Process (6) – If a SIDS event is detected, the program sends a signal to fire the solenoid which Our Parents passes through a transistor. The solenoid strikes the infant’s foot and elicits the Babinski Reflex.
Pages to are hidden for
"PowerPoint Presentation"Please download to view full document