Complex sentence: Cheselden is famous for the invention of the lateral lithotomy approach to remove bladder stones, which he first performed in 1727 and which had a short duration (minutes instead of hours) and a low mortality rate (approximately 50%).
Split into simpler sentences: Cheselden is famous for the invention of the lateral lithotomy approach to removing bladder stones, which he first performed in 1727. The procedure had a short duration (minutes instead of hours) and a low mortality rate (approximately 50%).