Which angle is used for intravenous administration according to the reference?

• A. 45 degrees
• B. 90 degrees
• C. 25 degrees
• D. 10-15 degrees

Answer: (C)

For intravenous administration, the needle is used at a shallow angle so the tip can enter the vein without penetrating deeply into surrounding tissue. The reference specifies about a 25-degree angle for IV injections. This angle helps the cannula glide into the vein lumen smoothly and minimizes the risk of going through the vein wall or depositing into subcutaneous tissue.

To place this in context with other routes: intramuscular injections are given at a near-perpendicular angle, about 90 degrees, to reach muscle. Subcutaneous injections are typically performed at a shallower angle, around 45 degrees (though it can vary with needle length and patient habitus). Intradermal injections are even shallower, around 10-15 degrees, to stay within the skin layers. So the 25-degree angle is the one aligned with intravenous administration as described in the reference.