Which of these innovative medical products was developed FIRST and brought to market?

The healthcare industry constantly evolves with groundbreaking product developments that transform patient care. This poll tests your knowledge about the timeline of significant medical product innovations that have revolutionized treatment approaches. Understanding these milestones helps appreciate how product development in medicine has advanced over decades, creating solutions that were once thought impossible.

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Pulse oximeter (non-invasive blood oxygen measurement device)
Disposable insulin pen (self-administration injection device)
Implantable cardiac pacemaker (artificial heart rhythm regulator)
Magnetic Resonance Imaging (MRI) scanner for clinical use