Piston Ventilator

grabcad

Designer Luis Marina's Key Features Include Pressure, Volume, and Breath Assist Modes Possible, Data Monitoring through Touchscreen, Error Alarm, HME Filters, and More. Key Features: Pressure, volume, and breath assist modes available for optimal patient care. The system allows for real-time data monitoring and setting control via a user-friendly touchscreen interface. An error alarm is integrated into the design to alert medical personnel of any issues. Additionally, HME filters ensure that patients and medical staff are protected from particulates while maintaining humidity levels. Operating Parameters: 30 BPM at 1 liter per minute 60 BPM at .5 liter per minute The BVM (Bag-Valve-Mask) system is designed to handle expiration valving, oxygen connection, PEEP port, and pop-off valve, providing a comprehensive solution for respiratory care. The device can be easily hung on the side of a hospital bed, taking up minimal space. Compact Design: The system's compact design allows it to fit within a standard PVC pipe, measuring 2 feet in length and 4 inches in diameter. A 3D-printed piston is moved by a linear actuator, housed within the pipe, to provide smooth and efficient airflow. Power Supply: The device runs on standard 120v AC power, which is converted to 12V for easy use. This allows for the addition of a backup battery, ensuring continuous operation even in the event of a power outage. If the system fails, the switch to BVM manual ventilation is instantly available, providing a reliable fallback option. Tools and Cost: The only tools necessary for assembly are a 3D printer and drill, making it easy to build and customize the device. The total cost is less than $300, with potential savings of up to $200 at bulk pricing. General Description: The design centers around a 2-foot long PVC pipe and internal 3-D printed piston, which is moved by a linear actuator housed within the pipe. Air is drawn through a CPR one-way flapper valve with a built-in filter as the piston rises. The air then flows into a hose leading to an Ambu or Laerdal bag on a hospital bed. An HME filter is connected to the breathing port on the Ambu bag, retaining humidity and acting as a viral filter for the air entering the patient. From the HME, an intubation tube enters the patient, providing critical air/oxygen. The system features an adjustable PEEP valve, oxygen port, mixing chamber, and non-electronic exhalation control valving, all easily accessible through the Ambu bag. In the event of a ventilator failure, manual Ambu ventilation can begin immediately, as the system is inline with the device. The HMI (Human-Machine Interface) features a 3.5-inch Nexion touchscreen for setting adjustment and parameter monitoring, compatible with the Arduino. This allows for real-time control and monitoring of the system. The Honeywell sensor detects pressure differential between ambient air and patient air, enabling breath assist mode and pressure mode. An ultrasonic sensor is trained on the piston to detect speed/position and calculate flow rate, which feeds into the command to control the piston's movement. Overall, the system aims to be cost-effective, space-efficient (entirely housed in a single PVC cylinder), and easy to build with mostly readily available parts (others to be 3-D printed). The mechanical portion is mostly prototyped, and the electronics are currently in development.