By the mid-19th century, improvements in illumination and optics transformed endoscopy from a theoretical idea into a practical clinical tool, culminating in Antoine Jean Desormeaux's work in Paris in 1853. Building on Bozzini's Lichtleiter and frustrated by diagnostic limits of palpation, Desormeaux replaced candlelight with a brighter, controllable source known as the gazogène.

Description: PDF Notes for Surgery 101 episode From Mirrors to Incandescent Bulbs: The 19th- Century Leap

In 1806, physician Philipp Bozzini introduced the Lichtleiter, a candle-lit, mirror-lined instrument designed for direct visual inspection of internal organs—an idea far ahead of its time and initially met with skepticism. Though dismissed by many contemporaries, the device is now recognized as the first true endoscope, establishing Bozzini as the founder of endoscopy.

PDF Notes for Surgery 101 episode on A Candle in the Darkness – Philipp Bozzini and the Lichtleiter

Technological progress in medicine, as in other fields, emerges from the interplay of incremental refinement and decisive breakthroughs—those moments when a missing element is discovered and the path forward suddenly accelerates. The evolution of endoscopic surgery over the last century illustrates this well. Yet even today, the terminology surrounding procedures that employ scopes is often misunderstood. "Endoscopy" and "laparoscopy" are frequently used interchangeably, though they refer to distinct techniques, instruments, and purposes.

PDF notes for Surgery 101 episode on Endoscopy vs Laparoscopy and the Beginnings.

After listening to this episode, learners should be able to: - Outline the theory and physics of laser refractive surgery - Describe the differences between PRK, LASIK, and SMILE - List key indica1ons, exclusions, and essential pre-op tests - Explain common risks, benefits, and complications of laser eye surgery

PDF Notes for Surgery 101 episode on Laser Refractive Surgery

After listening to this episode, learners should be able to: 1. Explain the anatomy and optics of the eye related to the optical axis of the eye 2. Describe common refractive errors 3. Explain how refractive errors are measured 4. Recognize important red flags for non-refractive causes of vision loss 5. Summarize current vision correction options

PDF Notes for Surgery 101 episode on Refractive Errors, Eye Optics & Vision Correction Options NOTES