Digital Canine CPR Performance System

Rescue Critters ® is a company that manufactures animal mannikins for training purposes, most notably health education services. These devices are meant to give the user the ability to hone their skills and knowledge without harming real life animals. Existing CPR models are used as first aid training devices. These models have working lungs and simulate mouth-to-snout resuscitation.

Traditional CPR mannikins have physical indicators that allow the trainee to determine whether they have reached the target measurement necessary to provide effective resuscitation. For these cases, the CPR devices do not provide technical feedback to the user's performance beyond a mechanical system. They rely on physical methods to navigate their training which instills a more passive learning experience.

The focus area of this project is set in critical care.
The aim of this project is to create a device that will prepare students for emergency situations by educating them on their CPR technique. Knowing this information would help the student restore the blood flow into a canine undergoing cardiac arrest.

A successful chest compression on a canine is meant to decrease the chest size by 20 - 30% and the pressure applied should be performed at a rate of 80 - 120 times per minute. A medium sized canine mannikin will be used to quantify these metrics for educational purposes.

Design Requirements

Our team was meant to design and implement a device that collects the following data from a chest compression on the canine mannikin:

• Compression depth

• Pressure/Force

• Compressions per minute (CPM)

A summary of our design and customer requirements is provided in the table below:

We are determined to meet these requirements set by our sponsor in a simple and unified approach in order to be the groundwork for future production. This design is intended to serve as a foundation for future CPR canine mannikins of different shapes and sizes.

Our proposed design solution is broken down into the following key components placed into two main electrical assemblies:

INTERNAL: SENSOR HUB

• Four Force Sensing Resistors that allow us to collect pressure values from the moment a compression is applied to the mannikin

• An Accelerometer that collects changes in motion in 3D place

• An Internal Printed Circuit Board (PCB) to house sensors in mannikin

• A 3.3”X3.3”X0.65” Delrin case to contain the internal PCB and sensors

• A Galvanized Steel sensor cover

EXTERNAL: USER FEEDBACK

• A Microcontroller (MCU) that processes the signals into readable metrics and exports them onto the 4 inch user interface display

• A TFT LCD Display which receives the input data from the MCU and outputs a time graph for the compression depth with the compression rate and pressure exhibited as digitally rendered values

• A Battery Pack to power the overall system

• An External Printed Circuit Board (PCB) to house the MCU, display, and battery

• An ABS plastic case

These components were chosen to fulfill our sponsor's design requirements and we acknowledge that future design iterations can make this solution into a more robust design.