The nurse distinguishes that a patient may experience which signs and symptoms related to diabetes insipidus (DI)?

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.

A. Maintain head of bed elevation at 15 degrees or less: For a patient with increased intracranial pressure (ICP), the head of the bed should typically be elevated 30 degrees, not limited to 15 degrees. Proper elevation promotes venous drainage from the brain and helps reduce ICP, making 15 degrees insufficient for effective ICP management.

B. Provide oxygen therapy to maintain oxygen saturation above 92: Maintaining adequate oxygenation is critical in patients with neurological injury. Hypoxia can worsen cerebral ischemia and increase ICP, so oxygen therapy should be titrated to keep SpO₂ within the prescribed safe range, typically above 92%, to support cerebral perfusion and prevent secondary brain injury.

C. Keep lights dim in client's room to accommodate photophobia: While dim lighting can increase comfort in patients with migraine or photophobia, it does not directly affect ICP management. This action is supportive but not a priority intervention in caring for a patient with increased ICP.

D. Assess the client for headaches and behavior changes frequently: Frequent neurological assessment, including monitoring for changes in level of consciousness, behavior, and headache, is essential for early detection of worsening ICP or complications. These assessments guide timely interventions and are critical in intensive care management of post-stroke patients.

E. Minimize suctioning or hyper-oxygenate client before suctioning: Suctioning can stimulate coughing and increase ICP. To prevent sudden spikes in ICP, suctioning should be minimized and performed only when necessary, with pre-oxygenation to maintain cerebral oxygenation and reduce secondary brain injury risk.