Covent-19: Team Breathe Easy

Last crawled date: 1 year, 11 months ago

Onshape public link: https://cad.onshape.com/documents/c0f9e0b7f866ab5e0430e3ac/w/edf665f776ce03edd9271d68/e/457ef016a0e7db39722cca00

The ventilator will be an electromechanical system that operates mainly by mechanical means which provides such benefits as simpler manufacturing ability. The initial and any subsequent altering of the design are further simplified with minimal and strategic use of electrical components, especially where they increase patient safety by narrowing the margins on the control range validation requirements. The system’s operation will be regulated with pneumatic powered valves which reduce electrical power consumption should the main power supply go out the back up power be needed to run the alarm system for an extended period. The pump will be a single cylinder with a dual silicone sealed partition creating two chambers. One chamber has an inlet of conditioned low pressure air and oxygen mix that is used to expand the same chamber during the patient’s expiratory cycle. The outlet pressure of this same chamber is precisely controlled via a relief valve opening at the correct threshold. The pressure is attained in the chamber via valves opening in the other chamber thus pressurizing it to a higher degree and moving the partition accordingly. The partition movement is controlled to an adjustable distance that correlates to the prescribed tidal volume. Any excess pressure is mitigated via a blow off valve.

The user interface will consist of analog components: only analog components will be used to simplify regulatory validation. The readouts for the user will also be presented on analog instruments such as pressure gauges and dials. The system will be fairly lightweight and have a small footprint. It will be as compact as possible so it is portable. It will have a handle or other attachment points to make it easy for the hospital to integrate into the room setup. Incorporated into the design is a rolling tripod supporting the vertical ventilator mounting rod situated at a height for easy adjustability by medical staff. Additionally on the vertical ventilator mounting rod is a platform for the humidifier. The non-disposable components will be easily identified as to assist with patient transfer and set up. The design is oriented around 3D printing for local manufacturability.