Parenteral Administration - Ccma

1. What is the correct order when drawing medication: inject air into vial before withdrawing medication?

   Inject air first, then invert vial and withdraw the ordered dose. Air injection equalizes vial pressure, facilitating smooth withdrawal without creating a vacuum.

2. What is the typical maximum volume for a subcutaneous (SubQ) injection?

   Usually up to $1\ \text{mL}$. Subcutaneous tissue can safely absorb this volume for gradual release into circulation.

3. What is the correct injection angle and tissue layer for a subcutaneous (SubQ) injection?

   $45^\circ$ or $90^\circ$; into subcutaneous fat tissue. This angle penetrates the fatty subcutaneous layer, allowing for slower absorption suitable for medications like insulin or heparin.

4. Which injection type requires creating a small bleb (wheal) as a correct endpoint?

   Intradermal (ID) injection. Formation of a wheal confirms proper placement in the dermal layer for tests like TB screening.

5. What is the Z-track method used for during IM medication administration?

   To prevent medication leakage into subcutaneous tissue and staining. The technique displaces skin laterally to seal the injection tract, containing medication within muscle.

6. Which IM site is generally considered the safest for larger-volume IM injections in adults?

   Ventrogluteal site. Anatomical positioning avoids the sciatic nerve and major vessels, enhancing safety for higher volumes.

7. Which IM injection site should be avoided due to proximity to the sciatic nerve?

   Dorsogluteal site. Proximity to the sciatic nerve increases the risk of injury and complications.

8. What needle length is commonly used for subcutaneous (SubQ) injections?

   Typically $\frac{3}{8}$ to $\frac{5}{8}$ inch. These lengths match subcutaneous tissue depth, avoiding intramuscular injection.

9. Which action is correct for needle disposal immediately after giving an injection?

   Activate safety device and discard in a sharps container. Safety activation and proper containment prevent accidental injuries and comply with biohazard protocols.

10. Which needle gauge range is typically used for intradermal (ID) injections?

    Typically $25$ to $27$ gauge. Finer gauges minimize tissue disruption in the superficial dermal layer while allowing precise delivery.

11. Which syringe is commonly used for small volumes and is marked in tenths for tuberculin testing?

    Tuberculin (TB) syringe. Fine markings in tenths of a milliliter support accurate delivery for diagnostic tests like PPD.

12. What needle length is commonly used for intradermal (ID) injections?

    Typically $\frac{3}{8}$ to $\frac{5}{8}$ inch. Short lengths prevent the needle from advancing beyond the dermis into deeper tissues.

13. Which IM site is preferred for infants due to muscle development and safety?

    Vastus lateralis. This site is well-developed in infants and minimizes risks to nerves and blood vessels.

14. What is the common maximum volume for an intramuscular (IM) injection in a single site for adults?

    Commonly up to $3\ \text{mL}$ per site. Muscle vascularity allows absorption of larger volumes without tissue damage.

15. Which syringe is specifically designed for small, precise doses such as insulin administration?

    Insulin syringe. Unit calibrations enable precise measurement of small doses critical for glycemic control.

16. Which IM site is generally preferred for adults for many vaccines due to low nerve injury risk?

    Deltoid muscle. Accessibility and minimal proximity to major structures reduce complication risks for vaccine administration.

17. What is the correct injection angle and tissue layer for an intramuscular (IM) injection?

    $90^\circ$; into skeletal muscle. Perpendicular insertion delivers medication deep into muscle tissue for rapid systemic absorption.

18. Which injection type commonly requires pinching the skin to lift subcutaneous tissue before insertion?

    Subcutaneous (SubQ) injection. Pinching isolates subcutaneous fat, ensuring accurate depth and reducing risk of intramuscular injection.

19. What is the correct injection angle and tissue layer for an intradermal (ID) injection?

    $5^\circ$ to $15^\circ$; into the dermis just under the epidermis. The shallow angle ensures medication deposition in the dermal layer for localized effects, such as in allergy testing or tuberculin skin tests.

20. What is the maximum typical volume for an intradermal (ID) injection?

    Up to $0.1\ \text{mL}$. Small volumes create a localized wheal without excessive dispersion in the dermal layer.

21. What needle length range is commonly used for intramuscular (IM) injections in adults?

    Typically $1$ to $1\frac{1}{2}$ inches. Longer needles are required to reach muscle tissue through varying subcutaneous depths in adults.

22. Which needle gauge range is typically used for subcutaneous (SubQ) injections?

    Typically $25$ to $30$ gauge. These gauges are appropriate for injecting into subcutaneous fat without excessive trauma or reaching muscle.

23. Which needle gauge range is typically used for intramuscular (IM) injections?

    Typically $20$ to $25$ gauge. Larger gauges accommodate viscous medications and ensure effective penetration into muscle tissue.

24. Identify the correct action if the medication in a vial is a suspension before drawing it up.

    Gently roll the vial to mix; do not shake unless directed. Gentle rolling resuspends particles uniformly without introducing air bubbles or denaturing the medication.

25. What is the immediate first action if a needlestick injury occurs after an injection?

    Wash the area with soap and water immediately. Immediate cleansing reduces the risk of infection from potential bloodborne pathogens.

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