Injection Route Comparison

Exam 2 Chapter 30 Med Admin

dermis / TB, allergy tests, local anesthesia, 26-27G, 3/8-1/2 in, usually <0.5 mL, 5-15 degrees, longest/slowest parenteral absorption

intradermal tissue/use, needle/volume, angle, absorption

adipose tissue / insulin, heparin, 25-30G, 3/8-1 in, usually ≤ 1 mL, 45-90 degrees, slow, sustained

Subcutaneous (SubQ) tissue/use, needle/volume, angle, absorption

muscle / vaccines, antibiotics, hormones, 1-5 mL, children/older adults often 1-2 mL, 90 degrees, faster than SubQ

intramuscular (IM) tissue/use, needle/volume, angle, absorption

directly into bloodstream, varies by access/device, direct venous access, immediate, no absorption step

intravenous (IV) tissue/use, needle/volume, angle, absorption

inner forearom, upper chest, upper back beneath scapula

common sites for intradermal injections

outer upper arm, abdomen, anterior thigh, upper back, upper ventral / dorsogluteal area

common sites for SUBQ injections