Injection Technique - Ccma
- What is the typical needle angle for an intramuscular (IM) injection?
- 90°. The perpendicular angle ensures deep penetration into the muscle for optimal medication absorption.
- What is the correct skin preparation technique before an injection with an alcohol pad?
- Clean center outward; allow to air-dry. Circular motion from center outward prevents recontamination, and air-drying ensures antiseptic efficacy without irritation.
- Which needle gauge range is commonly used for intramuscular (IM) injections in adults?
- 20 to 25 gauge. Larger gauges accommodate viscous medications and ensure efficient delivery into muscle without excessive resistance.
- Which injection route is administered into the tissue layer between skin and muscle?
- Subcutaneous (SC or SQ). This route delivers medication into the fatty tissue for slower absorption, suitable for drugs like insulin or heparin.
- Which needle gauge range is commonly used for subcutaneous (SC) injections?
- 25 to 30 gauge. Smaller gauges are suitable for less viscous medications and reduce discomfort in fatty tissue.
- Which option correctly describes bevel orientation for an intradermal injection?
- Bevel up. Upward orientation facilitates wheal formation by lifting the epidermis during shallow insertion.
- Which action is correct for preventing needle-stick injury immediately after injection?
- Activate safety device and dispose in sharps container. Immediate activation and proper disposal comply with safety protocols to minimize sharps injury risks.
- Which intramuscular (IM) site is preferred for infants due to larger muscle mass?
- Vastus lateralis. This thigh muscle is well-developed in infants, offering a safe site with minimal risk to nerves or vessels.
- Which intramuscular (IM) site has higher risk of sciatic nerve injury and is generally avoided?
- Dorsogluteal site. Proximity to the sciatic nerve increases injury risk, leading to recommendations to avoid this site.
- Which intramuscular (IM) site is commonly used for vaccines in adults and children?
- Deltoid muscle. The site's accessibility and adequate muscle mass make it suitable for smaller volume injections like vaccines.
- Which option best describes how needle gauge relates to needle diameter?
- Higher gauge number means a smaller diameter. Gauge numbers inversely correlate with diameter, so higher numbers indicate thinner needles for precise applications.
- Which needle gauge range is commonly used for intradermal (ID) injections?
- 25 to 27 gauge. Finer gauges minimize tissue trauma for shallow intradermal delivery, reducing pain and leakage.
- Which injection route is administered into the dermis just below the epidermis?
- Intradermal (ID). This route targets the dermis layer for local reactions, such as in allergy or TB testing, ensuring minimal absorption into deeper tissues.
- Which subcutaneous (SC) site is commonly used for vaccines such as MMR or varicella?
- Posterolateral upper arm (triceps area). The area's fatty tissue supports subcutaneous delivery for live virus vaccines, ensuring proper immune response.
- Which intramuscular (IM) site is preferred in adults due to lower sciatic nerve risk?
- Ventrogluteal site. This site avoids major nerves and blood vessels, providing a safer option for IM injections in adults.
- Which option is the correct site to avoid for any injection due to infection risk?
- Areas with inflammation, infection, or broken skin. Avoiding compromised skin prevents introducing infection or exacerbating existing conditions during injection.
- Which technique is used for IM injections to reduce medication tracking in tissue?
- Z-track technique. Displacing skin laterally seals the tract, preventing medication leakage and irritation to subcutaneous tissues.
- What is the typical needle angle for a subcutaneous (SC) injection?
- 45° or 90°. The angle accommodates varying subcutaneous tissue depth, preventing penetration into muscle while ensuring proper delivery.
- Identify the correct action if blood is aspirated during an IM injection (per facility policy).
- Withdraw, discard, and prepare a new dose at a new site. Aspiration of blood indicates vascular entry, requiring withdrawal to avoid intravascular administration and ensure safety.
- Which subcutaneous (SC) site is commonly used for insulin injections?
- Abdomen (avoid inches around umbilicus). The site's consistent absorption rate benefits insulin delivery, while avoiding the umbilicus prevents irritation.
- Which needle length is commonly used for intradermal (ID) injections?
- About 3/8 to 5/8 inch. Short lengths prevent penetration beyond the dermis, ensuring accurate intradermal placement.
- What is the typical needle angle for an intradermal (ID) injection?
- 5° to 15°. The shallow angle ensures the needle penetrates just below the epidermis to form a wheal without entering deeper layers.
- Which needle length range is commonly used for adult intramuscular (IM) injections?
- About 1 to 1.5 inches. Longer lengths ensure penetration through subcutaneous tissue into muscle, adjusted for site and patient size.
- Which needle length range is commonly used for subcutaneous (SC) injections?
- About 3/8 to 5/8 inch. These lengths reach subcutaneous tissue without entering muscle, varying by patient body habitus.
- Which injection route is administered into skeletal muscle tissue?
- Intramuscular (IM). This route allows rapid absorption due to rich blood supply in muscles, ideal for vaccines and certain medications.