Lung Volume During Lung Volume During Emergency RespirationEmergency Respiration

• The normal human has a total lung capacity (TLC) of 4-6 liters

• The normal tidal volume is only 0.5 liters

• Even at vital capacity, about 25% of the lung volume remains (residual volume)

• Residual volume can allow chemicals or other foreign substances to remain in the lung

High Frequency Ventilation to High Frequency Ventilation to Promote Fluidic MixingPromote Fluidic Mixing

• Creates a turbulent atmosphere

• Fresh air mixes with residual volume

• Clean air reaches alveoli more quickly

• Allows for oxygen to be more efficiently absorbed

• Waste gases are removed more efficiently

IPV vs. Bulk-Flow VentilationIPV vs. Bulk-Flow Ventilation

Design ProgressionDesign Progression

Ambu Bag – too much attention to device and Ambu Bag – too much attention to device and not enough to patientnot enough to patient

SureVent – looked to improve this existing SureVent – looked to improve this existing systemsystem

High Frequency Jet Ventilation – revolutionary High Frequency Jet Ventilation – revolutionary form of ventilationform of ventilation

Incorporation into new idea-(piston actuator, Incorporation into new idea-(piston actuator, reverse whistle, acoustics, pneumatic actuator, reverse whistle, acoustics, pneumatic actuator, fans)fans)

Final Design: Solenoid ValveFinal Design: Solenoid Valve

Design SchematicDesign Schematic

MicroKing Air Control ValveMicroKing Air Control Valve

3-Way inline valve for rapid control actuating3-Way inline valve for rapid control actuating 4.8 Watt Solenoid for 12 VDC4.8 Watt Solenoid for 12 VDC Operating pressure: vacuum to 125 psiOperating pressure: vacuum to 125 psi Capable of frequencies of over 100 hzCapable of frequencies of over 100 hz Price: $25.00Price: $25.00

Function GeneratorFunction Generator

MFJ Portable Function MFJ Portable Function Generator for $80.00Generator for $80.00

Simple square waves with Simple square waves with variable frequencyvariable frequency

Oscillator circuit consisting of Oscillator circuit consisting of step function generator step function generator

Obtaining schematic from Obtaining schematic from Professor WellsProfessor Wells

Power SourcePower Source

Requirements: mobile, rechargeable, Requirements: mobile, rechargeable, cheapcheap

12V Lithium-ion battery with adaptor 12V Lithium-ion battery with adaptor Rechargeable, Price: $80.00Rechargeable, Price: $80.00 12V Lead-Acid battery with adaptor12V Lead-Acid battery with adaptor Longer life, less expensiveLonger life, less expensive

Interview With Dr. ParmleyInterview With Dr. Parmley

Witnessed VD4 in actionWitnessed VD4 in action Obtained target frequency Obtained target frequency

and pressure and pressure Acquired VD4 user manualAcquired VD4 user manual

Where We Go From HereWhere We Go From Here

Construct prototypeConstruct prototype Utilize DesignSafe to analyze riskUtilize DesignSafe to analyze risk Meet with Dr. Baudenbacher to Meet with Dr. Baudenbacher to

select:select: frequency and pressure transducersfrequency and pressure transducers data acquisition software and programdata acquisition software and program Construct Testing ApparatusConstruct Testing Apparatus