A nurse is preparing to administer an intradermal injection for a client who requires a tuberculin skin test. What actions should the nurse plan to take?
Place a 1-inch needle on the syringe.
Hold the syringe at a 20° angle to the client’s skin.
Draw up 0.5 mL of purified protein derivative (PPD) from the vial.
Pinch the skin at the chosen site with the non-dominant hand before inserting the needle.
The Correct Answer is D
The correct answer is Choice D
Choice A rationale: A 1-inch needle is typically used for intramuscular injections, not intradermal administration. Intradermal injections require a short, fine-gauge needle—usually ¼ to ⅝ inch in length and 25 to 27 gauge—to ensure accurate placement within the dermis. Using a longer needle increases the risk of injecting into subcutaneous tissue, which alters absorption and invalidates the test. Scientific technique demands precise needle selection based on anatomical depth and pharmacokinetics of the test substance.
Choice B rationale: A 20° angle is inappropriate for intradermal injections, which require a shallow angle of 5° to 15° to ensure deposition within the dermal layer. Angles greater than 15° risk penetrating into subcutaneous tissue, compromising test accuracy and absorption kinetics. The dermis is a narrow layer between the epidermis and subcutaneous fat, and precise angulation is critical for forming the characteristic wheal and ensuring localized immune response. Scientific technique mandates strict adherence to angle parameters.
Choice C rationale: The standard volume for a tuberculin skin test using purified protein derivative (PPD) is 0.1 mL, not 0.5 mL. Administering 0.5 mL would exceed the recommended dose, potentially causing excessive local reaction, invalid test results, and patient discomfort. The Mantoux method requires exact dosing to elicit a controlled immune response for accurate interpretation. Scientific protocol emphasizes precision in volume to maintain test validity and minimize adverse effects. Overdosing violates established guidelines.
Choice D rationale: Pinching or gently pulling the skin taut at the injection site stabilizes the dermal layer and facilitates correct needle placement. This technique ensures the needle enters at the proper angle and depth, allowing formation of a visible wheal, which confirms intradermal delivery. It also minimizes patient discomfort and prevents misplacement into deeper tissues. Scientific technique for intradermal injections prioritizes anatomical control and tactile feedback to optimize accuracy and diagnostic reliability.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
The nurse should prioritize the safety of the patient. If a patient is frequently attempting to remove his feeding tube, it could lead to complications such as infection or injury. Therefore, the nurse might need to consider using a restraint as a last resort. However, it’s important to note that restraints should only be used when all other alternatives have been explored and failed. These alternatives include having staff or a family member sit with the patient, using distraction or de-escalation strategies, offering reassurance, using bed or chair alarms, and administering certain medications.
Choice B rationale
Covering the catheter so the patient cannot see it might not be effective if the patient is aware of its presence and is determined to remove it. This approach does not address the underlying issue and may not prevent the patient from attempting to remove the feeding tube.
Choice C rationale
Providing more stimulation in the patient’s environment might be helpful in some cases, but it may not prevent the patient from attempting to remove the feeding tube. The effectiveness of this approach would depend on the specific circumstances and the patient’s condition.
Choice D rationale
Waiting until tonight to see if the patient continues this behavior could potentially put the patient at risk. If the patient is frequently attempting to remove the feeding tube, immediate action may be necessary to ensure the patient’s safety.
Correct Answer is A
Explanation
Choice A rationale
The nurse should wait for 30 minutes and then measure the client’s oral temperature. Consuming cold substances like ice chips can temporarily lower the oral temperature, leading to inaccurate readings. Therefore, it’s recommended to wait for a period of time to allow the oral temperature to return to its normal state.
Choice B rationale
Proceeding to measure the client’s oral temperature immediately after consuming ice chips would likely result in an inaccurately low reading. The cold from the ice chips can temporarily lower the temperature in the mouth.
Choice C rationale
Documenting the inability to obtain an accurate reading of the client’s oral temperature is not the best action in this situation. While it’s important to document any factors that might affect the accuracy of a temperature reading, in this case, the nurse can simply wait a period of time after the client has consumed the ice chips before taking the oral temperature.
Choice D rationale
Providing the client a sip of warm water and waiting 5 minutes before measuring his oral temperature may not be sufficient to ensure an accurate temperature reading. The mouth needs adequate time to return to its normal temperature after consuming something cold.
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