Which infection control measure, by the nurse, reduces the potential spread of methicillin-resistant Staphylococcus aureus (MRSA)?
Wearing an N95 mask while in the room of a patient with airborne precautions.
Wearing a facemask while in the room of a patient with droplet precautions.
Use of a separate disposable blood pressure cuff for any patient with a draining wound.
Use of strict hand washing measures once in every 8-hour work shift.
The Correct Answer is C
Choice A rationale
Wearing an N95 mask is appropriate for airborne precautions, such as tuberculosis, but not specifically for MRSA, which requires contact precautions.
Choice B rationale
Wearing a facemask is suitable for droplet precautions, such as influenza, but MRSA is primarily spread through direct contact, not droplets.
Choice C rationale
Using a separate disposable blood pressure cuff for patients with draining wounds helps prevent the spread of MRSA. MRSA can be transmitted via contaminated medical equipment.
Choice D rationale
Strict hand washing measures are essential but should be performed more frequently than once every 8-hour shift. Hand hygiene should be practiced before and after patient contact.
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Correct Answer is A
Explanation
Choice A rationale
Decreasing coronary artery constriction by giving aspirin is a primary objective in managing unstable angina. Aspirin inhibits platelet aggregation, reducing the risk of clot formation and improving blood flow in the coronary arteries. This helps to alleviate chest pain and prevent myocardial infarction.
Choice B rationale
Increasing afterload for the left ventricle to maximize cardiac output is not a desirable objective in managing unstable angina. Increasing afterload would increase the workload on the heart, which is counterproductive in patients with angina. The goal is to reduce the heart’s workload and improve blood flow.
Choice C rationale
Increasing preload to reduce overall cardiac workload is not a primary objective in managing unstable angina. Increasing preload would increase the volume of blood returning to the heart, potentially worsening symptoms. The focus is on reducing myocardial oxygen demand and improving coronary perfusion.
Choice D rationale
Reducing arterial inflammation by administering statins is a long-term strategy for managing cardiovascular disease, but it is not the immediate objective in managing unstable angina. Statins help to lower cholesterol levels and reduce inflammation, but the immediate goal in unstable angina is to relieve chest pain and prevent myocardial infarction.
Correct Answer is A
Explanation
Choice A rationale
Sepsis is a systemic inflammatory response to infection, often characterized by fever (temperature of 38°C or higher) and tachycardia (heart rate of 120 beats per minute or higher). These symptoms indicate the body’s response to a severe infection.
Choice B rationale
Hypovolemic shock is caused by significant fluid loss, leading to decreased blood volume and perfusion. It typically presents with hypotension and tachycardia, but not necessarily fever.
Choice C rationale
Myocardial infarction (heart attack) is characterized by chest pain, shortness of breath, and other symptoms, but fever and tachycardia are not primary indicators.
Choice D rationale
Pulmonary embolism involves a blockage in the pulmonary arteries, leading to symptoms such as sudden shortness of breath, chest pain, and rapid heart rate, but not typically fever.