A 78-kg patient in septic shock has a pulse rate of 120 beats/min with low central venous pressure and pulmonary artery wedge pressure. After initial fluid volume resuscitation, the patient's urine output has been 30 mL/hr for the past 3 hours. Which order by the health care provider should the nurse question?

B. Cheyne-Stokes respirations involve a cyclical pattern of breathing characterized by gradual increase and decrease in the depth and rate of respirations, with periods of hyperventilation alternating with periods of apnea. It is commonly seen in patients with neurological disorders, heart failure, or drug overdose.

A. Apneustic respirations are characterized by prolonged inspiratory gasps followed by a brief pause and insufficient expiration. This pattern is often associated with damage to the pons in the brainstem.

C. Stridor is a high-pitched, noisy respiratory sound caused by turbulent airflow through partially obstructed airways. It is typically heard during inspiration and is often associated with upper airway obstruction, such as in cases of croup or epiglottitis.

D. Kussmaul respirations are deep, rapid, and labored breathing patterns often seen in patients with metabolic acidosis, particularly diabetic ketoacidosis. Unlike Cheyne-Stokes respirations, Kussmaul respirations do not involve periods of apnea.

C. Mean arterial pressure (MAP) reflects the average pressure in the arteries during one cardiac cycle and is an important indicator of tissue perfusion. A MAP of 56 mm Hg is below the normal range (typically >60 mm Hg) and may indicate inadequate tissue perfusion. While norepinephrine is commonly used to increase blood pressure and improve tissue perfusion in hypotensive patients, a MAP of 56 mm Hg suggests that the current infusion rate may not be sufficient to maintain adequate perfusion, and adjusting the infusion rate may be warranted.

A. Norepinephrine is a vasopressor medication primarily used to increase blood pressure in patients with hypotension or shock. A low pulmonary artery wedge pressure (PAWP) suggests decreased preload, which may indicate hypovolemia or inadequate fluid resuscitation. In this case, adjusting the norepinephrine infusion rate may not be necessary, but rather addressing the underlying cause of hypovolemia or inadequate preload.

B. Systemic vascular resistance (SVR) represents the resistance the heart must overcome to pump blood into the systemic circulation. An elevated SVR may suggest vasoconstriction, which could be a desired effect of norepinephrine infusion to increase blood pressure. Therefore, an elevated SVR may not necessarily indicate a need to adjust the norepinephrine infusion rate, as it may reflect the medication's intended action.

D. Norepinephrine primarily acts on alpha-adrenergic receptors to increase blood pressure by inducing vasoconstriction. While it may cause reflex bradycardia due to increased systemic vascular resistance, a heart rate of 58 beats/min may be within an acceptable range depending on the patient's clinical condition and baseline heart rate. Therefore, a slow heart rate alone may not necessarily indicate a need to adjust the norepinephrine infusion rate unless it is associated with signs of inadequate tissue perfusion or other concerning symptoms.