ASET Technology Alberta Fall 2020 - 26

P R OJ E C T

AC A D E M I C I N S T I T U T I O N

Bag Me Up
Scotty

NAIT
E N G I N E E R I N G T E C H N O L O GY D I S C I P L I N E

Biomedical engineering technology

P R OJ E C T D E S C R I P T I O N

Bag valve masks provide positive pressure ventilation to patients and promote oxygenated blood flow to the brain and
heart. Proper chest compressions help to maintain blood
circulation, allowing gas exchange to continue within the
patient. During CPR, a combination of rescue breathing with
the bag valve mask and chest compressions are required.
The bag valve mask must have a proper seal to deliver adequate breaths to the patient.
Functional problems with this technology include medical
personnel fatigue, inadequate breath delivery and patient
gastric insufflation. Medical personnel fatigue can compromise resuscitation outcomes and patient care. Inadequate
breath delivery can come from an improper airway position,
such as pushing the mask into the face instead of the jaw.
This would prevent airflow from travelling into the lungs due
to an obstructed path caused by the tongue. Another example of inadequate breath delivery is an ineffective seal
resulting in air leakage, negatively impacting breath delivery
and gas exchange. Gastric insufflation is a result of overventilating (too much volume) and hyperventilating (breathing too fast) that induces patient vomiting and causes airway obstruction.
This project aims to integrate automation during the bagging procedure, assisting medical personnel in the field
with resuscitation. The direct benefit is reduced fatigue and
increased patient focus, which yields a more consistent
breath delivery. The Bag Me Up Scotty 5000 (BMUS 5000)
integrates resuscitation functionality through four different
systems: a touchscreen application, a bag compression
unit, an end-tidal CO2 monitor and a web application.
The touchscreen application will provide the user with a
graphical user interface. Through this touchscreen, the user
has the option to select either CPR or intubation mode. In
CPR mode, the user will perform 30 chest compressions
then will manually press the red button on the device to
activate the bag compression unit. The display will show a
prompt that indicates the button is ready to be pressed, as
well as inform the user when the bag is compressing. During

26 | FALL 2020 | TECHNOLOGY ALBERTA

the intubation mode, the user will be prompted to select a
compression interval time. After the time has been selected,
a start button will appear on the screen, and once pressed,
the automated bag valve mask will begin its operation. A
stop button will then appear after the unit has started.
The bag compression unit contains a pressure sensor that
will measure the pressure in the breathing circuit and alert
the user if any airline occlusions or overpressures occur.
The patient's end-tidal CO2 (ETCO2) is monitored using a
sidestream CO2 sensor. The sensor is activated while the
automated bag valve mask is in operation, and will continue
recording the ETCO2 values until the operation is terminated. The ETCO2 waveform will determine the effectiveness of
the chest compressions, along with the patient's response
to the resuscitation.
After the operation of either mode is completed, the user has
the option to save the recorded data. If the user chooses to
save the data, they will be prompted to input the patient's information, including the patient's full name and health care
number. Once that is completed, that information, along with
the end-tidal CO2, pressure data points and the timestamp
for each data point is then sent to the web application. This
stored data is accessed by connecting to the website and
logging in with a valid username and password. The default
configuration of the BMUS 5000 is to operate locally in a
simulated environment. However, the device can be modified to connect to a specified, secured hospital web domain.
The BMUS 5000 was designed with quick disconnects to
allow for efficient airline tubing replacements. We additionally implemented bag clamps to hold the bag in place while
bag compressions are performed, and allow for easy bag
removal. We chose to incorporate a slanted touchscreen
and button mount in anticipation of the device being placed
on the ground, where a 45° slant contributes to the device's
ergonomics.



ASET Technology Alberta Fall 2020

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https://www.nxtbook.com/dawson/aset/ta_fall_2021
https://www.nxtbook.com/dawson/aset/ta_summer_2021
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https://www.nxtbook.com/dawson/aset/ta_winter_2019
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