TED-Ed: Sajan Saini: How light technology is changing medicine

The video explains how pulse oximeters measure blood oxygen levels using light absorption by hemoglobin. It addresses challenges in measurement due to varying blood vessel sizes and introduces solutions using infrared light. The video also explores integrated photonics and ring resonators for precise chemical fingerprinting. It envisions future labs-on-a-chip for non-invasive medical diagnostics using saliva and sweat. The conclusion highlights the repurposing of light for technological and medical advancements.

How does the pulse oximeter measure oxygen levels without a blood sample?

What is the function of a pulse oximeter?

Explain the significance of using both red and infrared light in measuring hemoglobin.

What role does integrated photonics play in modern medical technology?

Describe how a lab-on-a-chip could revolutionize disease detection.

What are the potential benefits of analyzing human saliva for medical purposes?

How does the concept of a 'chemical fingerprint' aid in diagnosing illnesses?