What size gauge is typically used for a subcutaneous injection?

For subcutaneous injections, a gauge size of 25 to 27G is commonly used. This range allows for the proper administration of medications into the fatty tissue just beneath the skin without causing excessive discomfort or trauma to the patient. The needle gauge is fine enough to minimize pain during injection while still being large enough to deliver the medication effectively.

Subcutaneous injections are often used for vaccines, insulin, and other medications that require slow absorption, making it essential to choose a gauge that balances comfort and efficacy. The use of larger gauges, such as those in the 18 to 20G range, would be more appropriate for intravenous lines or intramuscular injections where thicker fluids need to be administered more rapidly. The smaller gauges, such as 30 to 32G, are typically used for very fine injections, such as in allergy testing or insulin delivery devices, where minimal tissue trauma is desired. Thus, the gauge size of 25 to 27G effectively addresses both the comfort and clinical needs associated with subcutaneous injections.