Nokea
What angle of insertion should be used for intradermal injections?
- A. 15 degrees
- B. 30 degrees
- C. 45 degrees
- D. 90 degrees
Correct Answer: A
Rationale: Intradermal injections require a shallow angle (10?15 degrees) to place the medication just under the skin surface.
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What gauge and length needle would you select to administer an IM injection of a viscous medication, such as gamma globulin, in the ventrogluteal site of a 29-year-old male body builder who is in good health and weighs 203 pounds?
- A. 25 g ? 1.5 in
- B. 20 g ? 1/2 in
- C. 21 g ? 7/8 in
- D. 24 g ? 1 in
- E. 18 g ? 1½ in
Correct Answer: E
Rationale: For a viscous medication like gamma globulin in a muscular adult, a larger gauge (18?21 g) and longer needle (1?1½ in) are needed to penetrate the muscle deeply. An 18 g ? 1½ in needle is appropriate for the ventrogluteal site in a muscular male.
What angle of insertion should be used for intramuscular injections?
- A. 15 degrees
- B. 30 degrees
- C. 45 degrees
- D. 90 degrees
Correct Answer: D
Rationale: Intramuscular injections require a 90-degree angle to ensure the medication reaches the muscle tissue.
You are preparing an intramuscular injection of vitamin K for a newborn who weighs 8 pounds and 8 ounces (3.8 kg). Which of the following needle sizes would be appropriate to use?
- A. 29 g ? 7/8 in
- B. 25 g ? 7/8 in
- C. 21 g ? 1 in
- D. 18 g ? 1 in
- E. 22 g ? 1½ in
Correct Answer: B
Rationale: A 25 g ? 7/8 in needle is appropriate for IM injections in newborns, ensuring penetration into the muscle (vastus lateralis) without excessive depth.
What angle of insertion can be used for subcutaneous injections in patients of all sizes?
- A. 15 degrees
- B. 30 degrees
- C. 45 degrees
- D. 90 degrees
Correct Answer: C,D
Rationale: Subcutaneous injections can be administered at a 45-degree angle for most patients or a 90-degree angle for those with sufficient subcutaneous tissue, depending on needle length and patient size.
Which of the following statements regarding insulin is(are) accurate?
- A. All insulin types can be mixed with other types.
- B. When drawing up regular and intermediate-acting insulins into the same syringe, you must draw the regular insulin first.
- C. Daily injection sites should be rotated once a week.
- D. Insulin is best kept in a dark, dry cabinet.
- E. The preferred site for administering insulin is the back of the upper arm.
Correct Answer: B
Rationale: b is correct because regular (clear) insulin should be drawn up first to prevent contamination with intermediate-acting (cloudy) insulin. a is incorrect as not all insulins can be mixed (e.g., Lantus cannot be mixed). c is incorrect as sites should be rotated daily, not weekly. d is incorrect as insulin should be stored in a refrigerator or cool place, not a dry cabinet. e is incorrect as the abdomen is the preferred site for insulin due to consistent absorption.