Which design innovation for defibrillators most significantly increased their successful use by untrained bystanders during cardiac emergencies?

The design of medical devices has evolved significantly over the decades, focusing on improving patient outcomes while addressing healthcare provider needs. This poll explores how product design principles have revolutionized a critical medical tool. Test your knowledge about how human-centered design has transformed healthcare products and saved countless lives.

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Voice prompts and visual guidance systems that walk users through the resuscitation process
Lightweight lithium batteries that extended device lifespan to over 5 years
Bluetooth connectivity that allows remote monitoring by emergency services
Waterproof casings that protect the device in all environments