# Wearable Physical Interface # Emergency Aid
# User-centered Design # UX Design
Overview
2023.07-09
Group (4 Members)
Product/UX Designer
GITD is a wearable device that assists CPR-trained individuals in taking confident action during emergencies. It provides real-time guidance, step-by-step instructions, and can be worn or carried in various ways for easy access.
Overview
Between fear and action, a life is waiting.
Where we saw the problem.
“436,852 Americans die from cardiac arrest in a single year… yet only 40.2% receive bystander CPR (cardiopulmonary resuscitation), even though CPR can double or triple survival.”
Cardiac arrest kills fast, but help is often slow, not because people don’t care, but because they don’t feel confident.
Where we dug deeper | Interviews
To understand why so few people step forward, we interviewed three individuals who had all learned CPR.
Question: Would you perform CPR if someone nearby needed help?
What we uncovered | The Problem
Many people who have received CPR training hesitate to act in real emergencies due to fear, uncertainty, and lack of confidence, leading to missed life-saving opportunities.
Persona | The Hesitant Responder
Objective | What we set out to do
We're designing a wearable CPR guide that empowers trained individuals to confidently perform CPR from the moment of collapse until help or an AED arrives.
User Journey Map | How we approached it.
We mapped the rescue journey to uncover design opportunities and shape our wearable–app system.
Next, we explored possibilities.
Technical Support
Need | Compression Essentials
Accurate depth, rhythm, and consistency must be detected for effective CPR guidance.
Research | Usable Sensors
Medical Pressure Sensor: Flexiforce, a thin, flexible, and highly sensitive sensor that being applied widely in medical field.
Testing | Signal Validation
We captured real compression patterns using a 0.5–0.6s interval and filtered out minor noise.
With the technical logic validated, we moved into exploring how the device could take shape.
Sketches
Final Product
Exploded View
How it Works
Storage
While not being used, GITD could be hanged as a keychain on bags.
Delivered to users in a foldable form as part of a completion package, our GITD wearable device is provided alongside certificates upon completing CPR training.
Packaging
Physical Model
Materials: PLA (3D Print) and Fabric.
