04/20/2026
TYPES OF INJECTIONS 💉🩺
Understanding how medications enter the body 👇
🔹 Intramuscular (90°) • Injected deep into muscle tissue • Allows rapid absorption • Common sites include deltoid and gluteal muscles
🔹 Subcutaneous (45°) • Injected into the fat layer beneath skin • Slower, steady absorption • Often used for insulin or vaccines
🔹 Intravenous (25°) • Delivered directly into a vein • Immediate effect in bloodstream • Used in emergencies and fluid therapy
🔹 Intradermal (10–15°) • Injected into the top skin layer • Small doses for testing (e.g., allergy or TB test)
🦴 Key Layers • Epidermis → outer protective layer • Dermis → contains nerves and vessels • Subcutaneous tissue → fat storage • Muscle → deep, vascular layer
⚙️ How it Works • Angle determines depth of injection • Different tissues absorb medication at different speeds • Technique ensures safety and effectiveness
💡 Easy Trick: “Deeper = Faster Action, Shallower = Slower Release” ⚡
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