Which design innovation in pulse oximeters (devices that measure blood oxygen levels) represented a breakthrough for non-invasive patient monitoring in the 1980s?

The design of medical devices has evolved dramatically over the decades, balancing functionality, safety, and user experience. Today's medical products undergo rigorous human factors engineering to ensure they can be used effectively by healthcare professionals under various conditions. This poll tests your knowledge about a significant design innovation that transformed patient monitoring technology.

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• The development of reflectance-based sensors that could be placed anywhere on the body
• The integration of transmission-based finger clip sensors using red and infrared light
• The introduction of disposable adhesive sensors with wireless connectivity
• The implementation of touchscreen interfaces for immediate data visualization

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