Correct Answer: B

Rationale: Normal saline is the preferred solution for wound irrigation because it is isotonic and will not damage healthy tissue or delay wound healing. It helps to remove debris and pathogens from the wound, promoting a clean environment for healing. Sterile water can be used if normal saline is not available, but it may cause cellular damage if used in large volumes. Hydrogen peroxide and Betadine solution are not recommended for wound irrigation as they can be cytotoxic to the tissues and interfere with the wound healing process. It's important for the nurse to use evidence-based practice and follow recommended guidelines to promote optimal wound healing outcomes.

Correct Answer: C

Rationale: Ethnographic research allows researchers to be neutral observers because it involves immersing oneself in the culture or community being studied without imposing their own biases or preconceptions. Ethnographers aim to understand the perspectives and behaviors of the people they are studying by observing them in their natural environment and engaging in participant observation. This approach enables researchers to gain insights into the social and cultural context of their subjects without influencing the outcomes or reactions. By maintaining neutrality and objectivity, ethnographic researchers can produce more authentic and unbiased results.

Correct Answer: C

Rationale: The member of the health team responsible for preparing pre-operative orders for a patient undergoing surgery, such as a coronary arterial bypass graft (CABG), is typically the anesthesiologist. Anesthesiologists are specialized physicians who are trained to administer anesthesia and manage the patient's well-being during surgery. They are responsible for assessing the patient's medical history, determining the appropriate anesthesia plan, and prescribing pre-operative medications. Cardiologists focus on diagnosing and treating heart conditions, surgeons perform the actual surgical procedure, and medical internists specialize in the diagnosis and non-surgical treatment of internal diseases. The anesthesiologist plays a crucial role in ensuring the safety and comfort of the patient before, during, and after surgery.

Correct Answer: A

Rationale: The patient's presentation of recurrent episodes of sudden, severe vertigo lasting hours with nausea, vomiting, and nystagmus, along with unilateral weakness on vestibular function tests, is most consistent with vestibular neuritis. Vestibular neuritis is characterized by inflammation of the vestibular nerve leading to sudden onset vertigo that can last for hours to days. It is often associated with nausea, vomiting, and nystagmus. Unilateral weakness on vestibular function tests indicates dysfunction of one vestibular system. Differential diagnosis for this type of presentation includes other conditions such as Meniere's disease, BPPV, and acoustic neuroma. However, the combination of symptoms and unilateral vestibular weakness makes vestibular neuritis the most likely diagnosis in this case.

Correct Answer: D

Rationale: Thrombocytopenia is a condition characterized by a low platelet count, which can lead to an increased risk of bleeding. Patients with thrombocytopenia are at risk for injury due to potential bleeding complications. Therefore, the appropriate nursing diagnosis to protect the patient from further injury in this case would be "Risk for injury related to thrombocytopenia." This nursing diagnosis allows the nurse to assess for signs of bleeding, implement interventions to prevent injury, and closely monitor the patient's platelet levels to prevent complications.