Nokea
To determine the effectiveness of medications that a patient has received to reduce left ventricular afterload, which of the following hemodynamic parameters should the nurse monitor?
- A. Central venous pressure (CVP)
- B. Systemic vascular resistance (SVR)
- C. Pulmonary vascular resistance (PVR)
- D. Pulmonary artery wedge pressure (PAWP)
Correct Answer: B
Rationale: Systemic vascular resistance reflects the resistance to ventricular ejection, or afterload. The other parameters will be monitored, but do not reflect afterload as directly.
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When the ventilator alarm sounds, the nurse finds the patient lying in bed holding the endotracheal tube (ET). Which of the following actions should the nurse take first?
- A. Offer reassurance to the patient.
- B. Activate the hospital's rapid response team.
- C. Call the health care provider to reinsert the tube.
- D. Manually ventilate the patient with 100% oxygen.
Correct Answer: D
Rationale: The nurse should ensure maximal patient oxygenation by manually ventilating with a bag-valve-mask system. Offering reassurance to the patient, notifying the health care provider about the need to reinsert the tube, and activating the rapid response team also are appropriate after the nurse has stabilized the patient's oxygenation.
Which of the following information obtained by the nurse when caring for a patient receiving mechanical ventilation indicates the need for suctioning?
- A. The respiratory rate is 17 breaths/minute.
- B. The pulse oximeter shows a SpO2 of 93%.
- C. The lungs have occasional audible expiratory wheezes.
Correct Answer: A
Rationale: The increase in respiratory rate indicates that the patient may have decreased airway clearance and requires suctioning. Suctioning is done when patient assessment data indicate that it is needed, not on a scheduled basis. Occasional expiratory wheezes do not indicate poor airway clearance, and suctioning the patient may induce bronchospasm and increase wheezing. An SpO2 of 93% is acceptable and does not suggest that immediate suctioning is needed.
The nurse is weaning a patient who has chronic obstructive pulmonary disease (COPD) from mechanical ventilation. Which of the following patient assessments indicates that the weaning protocol should be discontinued?
- A. The patient heart rate is 98 beats/minute.
- B. The patient's oxygen saturation is 93%.
- C. The patient respiratory rate is 32 breaths/minute.
- D. The patient's spontaneous tidal volume is 500 mL.
Correct Answer: C
Rationale: A respiratory rate of 32 breaths/minute indicates respiratory distress and suggests that the patient is not tolerating the weaning process, necessitating discontinuation of the weaning protocol. A heart rate of 98 beats/minute, oxygen saturation of 93%, and spontaneous tidal volume of 500 mL are within acceptable ranges for weaning.
The nurse is caring for a patient who requires medication to increase the contractility of the heart. Which of the following medications should the nurse anticipate administering for this patient?
- A. Metoprolol
- B. Procainamide
- C. Secobarbital
- D. Dopamine
Correct Answer: D
Rationale: Epinephrine, norepinephrine, isoproterenol, dopamine, dobutamine, digitalis-like drugs, calcium, and milrinone increase contractility. These agents are termed positive inotropes. Contractility is diminished by negative inotropes, such as acidosis and certain drugs (e.g., barbiturates [secobarbital], alcohol, procainamide, calcium channel blockers, β-adrenergic blockers [metoprolol]).
The intensive care unit nurse educator is teaching a new staff nurse about hemodynamic monitoring. Which of the following actions indicates that the teaching has been effective?
- A. Positions the zero-reference stopcock line level with the phlebostatic axis.
- B. Balances and calibrates the hemodynamic monitoring equipment every hour.
- C. Rechecks the location of the phlebostatic axis when changing the patient's position.
- D. Ensures that the patient is lying supine with the head of the bed flat for all readings.
Correct Answer: A
Rationale: For accurate measurement of pressures, the zero-reference level should be at the phlebostatic axis. There is no need to rebalance and recalibrate monitoring equipment hourly. Accurate hemodynamic readings are possible with the patient's head raised to 45 degrees or in the prone position. The anatomic position of the phlebostatic axis does not change when patients are repositioned.