Respiratory Tidal Volume Monitor and Feedback Device

A method of training a user to ventilate a patient comprising:

• providing the user with a respiratory tidal volume monitor and feedback device (RTVMFD) and a Bag-Valve-Mask (BVM) functionally connected to one another, wherein the RTVMFD has
• a frame;
• a flow channel tube attached to the frame;
• a mass flow sensor disposed on the flow channel tube to detect air flow through the flow channel tube;
• a microcontroller unit attached to the frame and electrically connected to the mass flow sensor via a bus;
• and
• a visual display attached to a top of the frame, with the visual display being electrically connected to the bus;
• selecting a target tidal volume;
• operating the BMV attempting to deliver the target tidal volume through the RTVMFD,
• providing the user with substantially real time tidal volume feedback on success in reaching the target tidal volume with each inspiration delivered.

A respiratory tidal volume monitor and feedback device (RTVMFD) comprising:

• a frame;
• a flow channel tube attached to the frame, with a first end of the flow channel tube accessible for functional attachment to Bag-Valve-Mask (BVM) system bag outlet;
• a mask connector, with a first end of the mask connector one of attached to and of unitary construction with a second end of the flow channel tube, and a second end of the mask connector accessible for functional connection to a BVM system mask;
• a mass flow sensor disposed on the flow channel tube to detect air flow through the flow channel tube;
• a microcontroller unit attached to the frame and electrically connected to the mass flow sensor via a bus, the microcontroller unit having a system processor, a system memory, and a system clock;
• an audio processor electronically connected to the bus;
• a visual display attached to a top of the frame, the visual display being electrically connected to the bus, wherein the visual display is plurality of LED pixels arranged in a ring shape;
• a speaker attached to the frame and electrically connected to the bus;
• a plurality of target volume (VT) indicia disposed on a ring guard, with each of the VT indicia being adjacent to a respective LED pixel representing a respective target volume for the each of the VT indicia;
• the system processor being configured to execute instructions to:
• receive mass flow data from the mass flow sensor during an inspiration;
• cause the LED pixels to illuminate sequentially and in a proportional number to a tidal volume of inspirated air represented by the mass flow data, wherein the complete LED pixel ring represents 100% of a target tidal volume, and the LED pixels sequentially and proportionally illuminate forming an increasing arc length of illuminated LED pixels around a circumference of the ring as the measured tidal volume of inspirated air for each inspiration ranges from 0.0 mL to the target tidal volume;
• cause the LED pixels to change colors of illumination from a first color to a second color in response to tidal volume of inspirated air increasing from below 50.0% of target tidal volume to more than 50.0% of target tidal volume;
• cause the LED pixels to change colors of illumination from the second color to a third color in response to tidal volume of inspirated air increasing from below 100.0% of target tidal volume to more than 100.0% of target tidal volume;
• determine if the RTVMFD is in an expiration state, an idle state, or an inspiration state, and when the RTVMFD is in an expiration state, the system processor checking for leaks by receiving mass flow data from the mass flow sensor during an expiration, computing an expiratory tidal volume from the expiration mass flow data, and when the expiratory tidal volume is less than 50.0% of an immediately previous inspiratory volume, determine that a leak is present, and causing a verbal audible cue to be generated when a leak is determined to be present;
• track a duration of inspiration with each inspiration delivered, determine if the duration of inspiration is less than, within, or greater than a target duration of inspiration window;
• cause one of the visual display or speaker to provide the user with a substantially real time duration of inspiration feedback when the duration of inspiration is outside of the duration of inspiration window, wherein the duration of inspiration feedback is
• in the form of a verbal cue that the duration of inspiration is short when the duration of inspiration less that the duration of inspiration window, and
• in the form of a verbal cue that the duration of inspiration is too long when the duration of inspiration is greater the respiration rate window;
• and
• cause the audio processor to cause the speaker to generate a verbal audio cue instructing the user bag initiate bagging at regular timed intervals.