Teaching for a new staff nurse has been effective when the new nurse performs which action while caring for a patient with hemodynamic monitoring?

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.