The nurse is participating in a Code Blue where the patient's cardiac rhythm requires a shock. Following the delivery of the shock, which action is priority?

A. Good dental hygiene: Patients with prosthetic heart valves are at increased risk for infective endocarditis. Maintaining excellent oral care, including regular brushing, flossing, and routine dental visits, helps reduce the risk of bacteremia from the oral cavity, which can seed the prosthetic valve. Patient education on this is a critical component of discharge instructions.

B. Activity restrictions: While some activity modifications may be advised initially postoperatively, most patients gradually return to normal activity levels unless otherwise indicated. General activity restrictions are not as essential as infection prevention education for long-term valve care.

C. Diet modifications: Unless the patient has comorbid conditions such as heart failure or hyperlipidemia, there are no specific diet modifications required solely due to mitral valve replacement. Nutritional education may be part of overall recovery but is not the primary discharge focus.

D. Long-term antibiotics: Prophylactic antibiotics are not routinely prescribed long-term for all patients after valve replacement. They are reserved for specific situations, such as prior to dental or invasive procedures, and should be used according to current guidelines rather than as a daily long-term regimen.

A. Ensures that the patient must be lying supine with the head of the bed flat for all readings: While patient positioning can affect hemodynamic measurements, it is not necessary for the patient to remain completely supine. The head of the bed can often be elevated up to 45 degrees without significantly altering readings if zeroing is done correctly at the phlebostatic axis.

B. Positions the limb with the catheter insertion site at zero reference of the stopcock line: Positioning the limb alone does not ensure accurate hemodynamic readings. Pressure transducers must be leveled relative to a standard anatomic reference (the phlebostatic axis) to account for hydrostatic pressure differences, regardless of limb placement.

C. Positions the zero-reference stopcock level with the phlebostatic axis: The phlebostatic axis (approximately at the fourth intercostal space, mid-axillary line) represents the level of the right atrium and serves as the reference point for accurate hemodynamic pressure measurements. Correct leveling ensures that readings of central venous pressure, arterial pressure, or pulmonary artery pressure accurately reflect the patient’s intravascular pressures.

D. Balances and calibrates the hemodynamic monitoring equipment every hour: Hemodynamic monitoring equipment is typically zeroed and calibrated at setup and when clinically indicated (e.g., after repositioning, line flushing, or pressure waveform changes). Hourly recalibration is unnecessary and does not substitute for correct leveling at the phlebostatic axis.