A GP practice is calculating stoma-related supply quantities. A 39-year-old woman requires flange (baseplate) changes every two days with an additional 7 spares per month on a 28-day repeat. How many flanges should be added to the repeat prescription?

A GP practice is calculating stoma-related supply quantities. A 39-year-old woman requires flange (baseplate) changes every two days with an additional 7 spares per month on a 28-day repeat. How many flanges should be added to the repeat prescription?

• A. 14
• B. 21
• C. 28
• D. 7

Answer: (B)

The main idea is to combine how often the item is used in the cycle with a buffer of spares. In a 28-day cycle, changing the flange every two days results in 28 ÷ 2 = 14 changes. Adding 7 spares for the month gives 14 + 7 = 21 flanges. So, 21 should be added to the repeat prescription.

The main idea is to combine how often the item is used in the cycle with a buffer of spares. In a 28-day cycle, changing the flange every two days results in 28 ÷ 2 = 14 changes. Adding 7 spares for the month gives 14 + 7 = 21 flanges. So, 21 should be added to the repeat prescription.