Answer to Question 1
A
Whereas a breath that is initiated by the patient is known as a patient-triggered or patient-assisted breath, a breath that is initiated by the ventilator is known as a machine-triggered or machine-controlled breath. A time-triggered breath is a machine-controlled breath that is initiated by the ventilator after a preset length of time has elapsed. It is controlled by the rate setting on the ventilator (e.g., a rate of 10 breaths/min yields 1 breath every 6 seconds). Flow-triggered and pressure-triggered breaths are patient-assisted breaths that are initiated by decreased flow or pressure, respectively, within the breathing circuit.
Answer to Question 2
A
Because platelet activation is a complex process involving multiple pathways, combination therapy with two or more agents has proven most effective. The current standard of care for percutaneous coronary intervention typically includes dual antiplatelet therapy with aspirin and a thienopyridine. These oral agents are administered before the procedure and continued at discharge. Abciximab, eptifibatide, and tirofiban are all intravenous antiplatelet agents.
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