The nurse calculates that 0.74 mi of filgrastim must be administered to a client subcutaneously. The client weights 165 lbs. What length and gauge of needle is best to administer this medication?

A. 2 inches 21 gauge: This option is too long and too large in gauge for subcutaneous administration. Typically, a longer needle is not necessary for subcutaneous injections, especially for standard adult adipose tissue. B. 1 1/2 inch 27 gauge: While this gauge is acceptable, the length is still longer than typically required for subcutaneous injections. A 1 1/2 inch needle is more suited for intramuscular injections. C. 5/8 inch 25 gauge: This is the most appropriate choice for a subcutaneous injection. A 5/8 inch needle is typically adequate for subcutaneous tissue in adults, and a 25 gauge needle provides a suitable size for comfort while allowing the medication to be administered effectively. D. 1/4 inch 19 gauge: This option is not suitable for subcutaneous injections. A 1/4 inch length is too short for effective penetration into subcutaneous tissue, and a 19 gauge needle is larger than necessary, which could increase discomfort.