NHA Certified Clinical Medical Assistant (CCMA)Clinical Patient CareEasy
A medical assistant is preparing to administer a subcutaneous injection. At what angle should the medical assistant insert the needle into the patient's skin?
- A90-degree angle
- B45-degree angle
- C15-degree angle
- D25-degree angle
Show answer & explanationAnswer & explanation
Correct answer: B. 45-degree angle
Subcutaneous injections are administered into the fatty tissue just below the skin. A 45-degree angle is generally recommended to ensure the medication reaches the subcutaneous layer without penetrating the muscle, especially when the skin is not pinched or for patients with less subcutaneous tissue.
Why the other options are wrong
- A. A 90-degree angle is used for intramuscular injections, which go deep into the muscle tissue.
- C. A 15-degree angle is typically used for intradermal injections, which go into the dermis, not the subcutaneous layer.
- D. A 25-degree angle is not a standard angle for common injection types; it's too steep for intradermal and too shallow for subcutaneous or intramuscular.
Subcutaneous Injection Angle
Subcutaneous injections deliver medication into the fatty tissue beneath the skin. The standard injection angle is 45 degrees, or 90 degrees if the skin is pinched and the needle is short, to ensure proper placement.
- Into subcutaneous fat layer.
- Standard angle is 45 degrees.
- 90 degrees if skin is pinched (for shorter needles).
Memory trick: Four-Five for fat, Ninety for muscle's exact.