How should a nurse obtain a culture of a patient’s wound?
Gently swab the center of the wound after irrigating with sterile saline.
Obtain a sample of the drainage from the dressing on the wound.
Use a sterile swab to collect a sample from the wound.
Collect a tissue sample from the wound during a surgical procedure.
The Correct Answer is C
Choice A rationale:
Irrigating with sterile saline before swabbing can dilute the wound specimen and reduce the accuracy of the culture results. This is because the saline can wash away some of the bacteria that are present in the wound, making it more difficult to identify the specific bacteria that are causing the infection.
Additionally, swabbing the center of the wound may not collect a representative sample of the bacteria present, as bacteria can often be found in higher concentrations at the edges of the wound. This is because the edges of the wound are often where the tissue is most damaged and where the bacteria are able to enter the body more easily.
Choice B rationale:
Obtaining a sample of the drainage from the dressing on the wound may not be as accurate as collecting a sample directly from the wound. This is because the drainage may contain bacteria from the surrounding skin or environment, which could contaminate the culture results.
Additionally, the drainage may not contain a representative sample of the bacteria present in the wound, as some bacteria may not be able to drain out of the wound.
Choice D rationale:
Collecting a tissue sample from the wound during a surgical procedure is the most accurate way to obtain a culture. However, this is not always feasible or necessary.
It is often possible to obtain an accurate culture by collecting a sample from the wound using a sterile swab. This is a less invasive procedure and can be done at the bedside.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale:
Stage 2 pressure injuries are characterized by partial-thickness loss of skin layers involving the epidermis and/or dermis. They present as a red, blistered area, often with an intact or ruptured serum-filled blister. The wound bed is typically moist and may be painful. There is no exposure of underlying bone, tendon, or muscle.
Key features of Stage 2 pressure injuries that align with the patient's presentation:
Red, blistered area: This is a hallmark sign of Stage 2, indicating tissue damage and inflammation in the epidermis and dermis. Large size: The size of the wound suggests more extensive tissue damage, consistent with Stage 2 rather than Stage 1.
Absence of deeper tissue involvement: The absence of exposed bone, tendon, or muscle rules out Stage 3 or 4 pressure injuries.
Rationales for other choices:
Choice B: Stage 4
Stage 4 pressure injuries involve full-thickness tissue loss with exposed bone, tendon, or muscle. This is not consistent with the patient's presentation, which does not describe exposed deeper tissues.
Choice C: Stage 3
Stage 3 pressure injuries involve full-thickness tissue loss, but without exposed bone, tendon, or muscle. They often present with a deep crater-like appearance and may have undermining or tunneling. The patient's wound does not exhibit these features, making Stage 3 less likely.
Choice D: Stage 1
Stage 1 pressure injuries are characterized by intact skin with non-blanchable redness over a bony prominence. They do not involve blisters or open wounds. The patient's presentation clearly exceeds the features of Stage 1.
Correct Answer is A
Explanation
Step 1: Convert the prescribed dose to milligrams. 400 mcg = 0.4 mg (since 1 mg = 1000 mcg)
Step 2: Compare the prescribed dose to the pill strength. The prescribed dose is 0.4 mg.
The pill strength is 0.4 mg.
Step 3: Determine the number of pills needed.
Since the prescribed dose and pill strength are equal, only one pill is needed to administer the correct dose.
Rationale for Choice A:
Correct: One pill of 0.4 mg will provide the exact dose of 400 mcg that has been prescribed.
Direct match: The pill strength matches the prescribed dose, eliminating the need for any calculations or adjustments.
Therapeutic equivalence: Administering one pill ensures that the patient receives the intended amount of medication to achieve the desired therapeutic effect.
Adherence to prescription: Conforms to the healthcare provider's instructions, promoting accurate and safe medication administration.
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