What does the gauge number of hypodermic needles refer to?

The gauge number of hypodermic needles is a standard measure that indicates the external diameter of the cannula. As the gauge number increases, the diameter of the needle decreases. This means that a higher gauge number corresponds to a thinner needle, while a lower gauge number indicates a thicker needle. Understanding the significance of the gauge number is crucial for pharmacy technicians, as it helps in selecting the appropriate needle for various medical procedures and administering medications.

In clinical practice, the choice of needle gauge is often based on factors such as the viscosity of the medication, the route of administration, and patient comfort. Ensuring that the correct gauge is used can minimize discomfort for patients while also ensuring that medications are delivered effectively.