1. University of Wisconsin Medflight Manual Ventilator Peter Ma- Leader, Richard “Joe” Long- Communications, Matt Valaskey- BWIG, Jimmy Fong- BSAC Dr. Paul Thompson-Advisor Dr. Mike Abernethy-Client, UW Medflight References References Micheal K. Abernethy, MD, FACEP University of Wisconsin Medflight AMBU www.AMBU.com Final Design Features Final design features an exhaust piece at the patient end of the circuit to avoid oxygen build- up. Exhaust incorporates an optional PEEP valve attachment. Disposable oxygen mask attaches directly to the valve and the patient. Medical ventilation tubing joins the exhaust to the more durable bellows supply tube, which is joined to the bellows output valve. Leak free joints with two-part epoxy and resin. Allows bellows to be paced further away from patient. Oxygen tank inlet with reservoir bag were joined to the input valve of the bellows using a two part epoxy. Allows the bellows pump to be attached and supplied with pure oxygen. Reservoir bag fills before the bellows pump and acts as a source of pure oxygen if rate of pumping is too high Safety valves on adapter serve to release oxygen if the pressure is too high or the bag is overfilled. Proposed Design Ideas Belt Attachment Customized belt attachment fixes existing manual ventilator on the operator’s thigh Extension circuit connects the ventilator to the patient with an exhaust valve at patient end. This allows free use of operator’s hands while supplying oxygen Hinge Design Design encloses compressible portion of ventilator inside custom hinge User controls movement of hinge via hydraulic system Hinge rests on patient or ground Bellow Design Foot-powered bellow pump is modified to include a oxygen inlet and reservoir, ventilation tubing attachment, and exhaust valve User drives air by compressing bellow with intuitive gas-pedal type motionAbstract The goal of the project is to create a ventilator that replaces the traditional hand-powered manual ventilation method with a hands-free method that gives the client greater ability to assist victims. Problem Definition The immediate aim of the project is three-fold: to properly ventilate, to allow the doctor greater flexibility (multi-task, use of hands), to allow for faster treatment during field operation. Medflight Background A specially trained team of physicians, nurses, pilots, and dispatchers Work in a 225 mile radius of Madison Can be in the air within minutes of receiving word of an accident Emergency equipment are carried in flight such as: ventilators, blood pressure monitor, heart monitors, IV equipment, defibrillators, pacemaker equipment Design Specifications Performance Requirements: Product provides pure oxygen to the patient at an air pressure ranging from 20-45 cpm, which is the designated pressure range of trauma victims. Operating Environment: Able to endure a variety of weather conditions Ergonomics: Bellow Pump, Oxygen Reservoir, Ventilation Tubing, Oxygen-Delivering (PEEP) apparatus Aesthetics, Appearance, and Finish: Smooth texture on the surface of the helmet, red color applied to provide aesthetic detail Client Requirements Product maintains the current capabilities of the AMBU manual ventilator Product is designed to comfortably fit at client’s feet or on his leg and stretch to the patient Apparatus must eliminate dead s ace where carbon dioxide accumulates Product must catalyze the process of individually providing life-saving treatment Existing Model Photos courtesy of www.ambu.com Development Stages Filing and sanding of bellows adapter to allow for a leak- free joint between the reservoir bag/oxygen inlet adapter Prepared site of ventilation tubing attachment Molding and melting of Lucite plastic to create an adapter for the exhaust and PEEP valve piece. This is to create the appearance and functionality of a one-piece unit. This stage connected ventilation tubing to exhaust piece The oxygen tank inlet adapter and the reservoir bag were extracted from an original AMBU respirator and molded to fit the bellows pump. Adapter maintains oxygen supply and provides air source for bellow to refill Prototype parts were connected to form one-piece unit and adequately ventilate. Our completed prototype was tested using a manometer and an artificial lung provided by the UW Hospital. Future Work Production of a disposable ventilation tubing and exhaust valve circuit, and improve the reservoir valve to sustain larger oxygen quantities. Ventilator could be adapted for mass-casualty situations with the addition of a actuator and powers source. Cost Analysis Bellow Pump $20.00 Ventilation Tubing $ 5.00 Exhaust Valve w/ PEEP Attachment $ 5.00 Oxygen Reservoir $ 5.00 Aesthetics (Epoxy, Paint) $ 5.00 _______________________________________________ Total $40.00Conclusion The bellow apparatus mimics the respiratory process of the AMBU bag by providing an air force throughout the ventilation system. The oxygen reservoir attachment provides a pure oxygen source attachment and prevents the ventilator from delivering an overpowering oxygen source.