According to the notes, kidney stones larger than which size typically require invasive procedures?

According to the notes, kidney stones larger than which size typically require invasive procedures?

• A. <5 mm
• B. 5-10 mm
• C. >10 mm
• D. 20 mm

Answer: (D)

Stone size guides how we manage kidney stones: the bigger the stone, the less likely it is to pass on its own, and at a certain point invasive removal becomes the preferred approach. When stones reach about 20 mm in diameter, spontaneous passage is unlikely, and usually an invasive procedure is recommended to remove or break up the stone. Smaller stones, such as those under 5 mm, often pass without intervention, and mid-sized stones (roughly in the 5–20 mm range) may be treated with less invasive methods like lithotripsy or endoscopic procedures depending on location and other factors.

Stone size guides how we manage kidney stones: the bigger the stone, the less likely it is to pass on its own, and at a certain point invasive removal becomes the preferred approach. When stones reach about 20 mm in diameter, spontaneous passage is unlikely, and usually an invasive procedure is recommended to remove or break up the stone. Smaller stones, such as those under 5 mm, often pass without intervention, and mid-sized stones (roughly in the 5–20 mm range) may be treated with less invasive methods like lithotripsy or endoscopic procedures depending on location and other factors.