Correct Answer: B

Rationale: Oxybutynin is a medication commonly used for the management of overactive bladder (OAB) symptoms such as urinary urgency and frequency. It belongs to a class of medications known as anticholinergics, which work by relaxing the bladder muscles and reducing bladder spasms. By doing so, it helps to decrease the symptoms of OAB, including frequent urination, sudden urges to urinate, and leakage. Oxybutynin can be taken orally in tablet form, as a transdermal patch, or as a gel, providing various options for patients based on their preferences and needs. Overall, oxybutynin is an effective treatment option for individuals experiencing overactive bladder symptoms.

Correct Answer: A

Rationale: The most important intervention for managing ventilator-associated pneumonia (VAP) caused by methicillin-resistant Staphylococcus aureus (MRSA) in a patient undergoing mechanical ventilation in the ICU is to start appropriate antimicrobial therapy targeting MRSA. Vancomycin or linezolid are commonly used antibiotics for MRSA infections. These medications are effective against MRSA and can help in treating the infection and preventing further complications. It is crucial to initiate antimicrobial therapy promptly once the diagnosis of VAP caused by MRSA is suspected or confirmed to improve patient outcomes. Other interventions such as bronchoalveolar lavage for diagnostic purposes, contact precautions, or antifungal therapy may be relevant but the priority is to start effective antibiotic therapy to target the specific pathogen causing the infection.

Correct Answer: A

Rationale: Erythema multiforme is a skin condition characterized by the sudden onset of a target-like rash with concentric erythematous rings and central clearing on the trunk and extremities. It typically presents with a distinctive "iris" or "bull's eye" pattern. Erythema multiforme is often triggered by exposure to certain medications, such as antibiotics, anticonvulsants, and other drugs. The rash is usually accompanied by symptoms like fever, malaise, and joint pain. It is important to identify and discontinue the offending medication causing the reaction in cases of drug-induced erythema multiforme.

Correct Answer: D

Rationale: In a situation where a nurse administers the wrong medication to a patient resulting in harm, both the nurse and the physician can be held liable for their respective roles in the error. The nurse is responsible for administering the incorrect medication, which is a violation of their duty to provide safe and appropriate care. However, the physician is also responsible because they failed to review the patient's documentation indicating the allergy to the medication before ordering it. As healthcare professionals, both the nurse and the physician have a duty of care to ensure patient safety, and in this case, both individuals failed in their responsibilities, leading to the harm caused to the patient. Therefore, both the nurse and the physician can be held accountable for the error.

Correct Answer: D

Rationale: If a nurse notices a discrepancy between the surgical count and the number of instruments on the sterile field during surgery, it is crucial to inform the surgical team immediately and initiate a thorough search. Patient safety is of utmost importance, and any missing instruments could potentially pose a risk to the patient. By informing the team and conducting a thorough search, the missing instrument can be located promptly to ensure it is not inadvertently left inside the patient's body. Continuing with the procedure or ignoring the discrepancy without further investigation could lead to serious consequences for the patient's well-being. It is always better to address any discrepancies or concerns during surgery proactively to maintain a high standard of patient care and safety.