Which of the following ranges of needle gauges is most appropriate for performing a venipuncture by the syringe method?

Needles in the 15–18 gauge range are significantly larger and are typically used for more invasive procedures, such as blood transfusions or intravenous therapy, rather than routine venipuncture. Their size can cause unnecessary trauma and discomfort to the patient, making them less appropriate for standard blood draws.

Although 25–26 gauge needles are smaller and may be used in pediatric or certain delicate applications, they can lead to slower blood flow rates and increased difficulty in obtaining a sample. This makes them less suitable for routine adult venipuncture, where a larger gauge is often necessary.

Needles in the 27–28 gauge range are considered too small for venipuncture in adults, as they may result in prolonged collection times and have a higher likelihood of causing hemolysis or inadequate samples. These sizes are better suited for very specific applications, such as administering injections rather than drawing blood.