A patient, admitted with respiratory failure, is intubated and placed on the ventilator with the following settings: Continuous mandatory volume (CMV) rate of 12 breaths per minute. TV 500 mL. Fi02 50% and PEEP 5 cm H20. The following arterial blood gases are obtained: pH 7.30. PaCO2 50 mmHg HCO3 23 mEq/L. PaO2 82 mmHg. Which of the following ventilator changes would the nurse recommend in the SBAR to the physician?

An increase in the CMV rate

Change to SIMV MODE

A decrease in The PaO2

A decrease in the CMV rate

Answer and Explanation

The Correct Answer is B

A. An increase in the CMV rate:
Increasing the continuous mandatory volume (CMV) rate would provide more mandatory breaths, which may not address the patient's respiratory acidosis. It could potentially worsen the situation by causing respiratory alkalosis.

B. Change to SIMV (Synchronized Intermittent Mandatory Ventilation) MODE
The patient's arterial blood gas results indicate respiratory acidosis with an elevated PaCO2 (50 mmHg) and a low pH (7.30). The nurse would recommend changing to SIMV mode to allow for spontaneous breaths in addition to the set mandatory breaths. This change helps the patient to have more control over their respiratory efforts and may assist in lowering the PaCO2.

C. A decrease in the PaO2:
Decreasing the partial pressure of oxygen (PaO2) is not an appropriate response, especially when the patient is already on mechanical ventilation and has a moderate PaO2 level. The primary concern is the elevated PaCO2 and respiratory acidosis.

D. A decrease in the CMV rate:

Decreasing the CMV rate would reduce the number of mandatory breaths, potentially allowing the patient to hypoventilate further and retain more carbon dioxide. This is not the appropriate intervention for a patient with respiratory acidosis.

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Correct Answer is D

Explanation

A. PEEP decreases the peak respiratory pressures:
PEEP may increase peak respiratory pressures, especially during inspiration, but its primary purpose is to prevent alveolar collapse and improve oxygenation.

B. “PEEP increases the number of breaths the patient takes on his own.”:
PEEP does not increase the number of breaths the patient takes. It primarily affects the quality of ventilation by preventing alveolar collapse.

C. “PEEP augments the patient’s overall tidal volumes.”:
PEEP does not necessarily increase overall tidal volumes. It focuses on maintaining positive pressure at the end of expiration to prevent alveolar collapse.

D. “PEEP improves oxygenation by keeping alveoli open after exhalation.”
Positive end-expiratory pressure (PEEP) is used in mechanical ventilation to maintain positive pressure in the airways and alveoli at the end of the respiratory cycle (expiration). This helps prevent alveolar collapse and improves oxygenation by keeping the alveoli open, particularly in patients with conditions like acute respiratory distress syndrome (ARDS). PEEP is commonly used to increase functional residual capacity (FRC) and improve oxygenation.

A. Suppress respiratory effort B. Decrease chest wall compliance C. Decrease respiratory secretions D. Induce sedation

Correct Answer is A

Explanation

A. Suppress respiratory effort
Pancuronium is a neuromuscular blocking agent that is often used to induce paralysis in patients requiring mechanical ventilation. It works by blocking the transmission of nerve impulses at the neuromuscular junction, leading to skeletal muscle paralysis. In the context of a client with acute respiratory distress syndrome (ARDS) on mechanical ventilation, the use of pancuronium helps to suppress respiratory effort, allowing for better control of the patient's ventilation and oxygenation.

B. Decrease chest wall compliance:
Pancuronium does not directly affect chest wall compliance. It primarily acts on skeletal muscles, leading to paralysis.

C. Decrease respiratory secretions:
Pancuronium is not used to decrease respiratory secretions. It is a neuromuscular blocking agent with the main goal of inducing paralysis.

D. Induce sedation:
Pancuronium does not induce sedation. It works on the neuromuscular junction and does not have sedative properties. Sedation may be achieved with other medications, such as sedative agents.

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Naxlex Comprehensive Predictor Exams

A student is caring for a patient with positive end-expiratory pressure (PEEP) at 5 cm H20. The student asks “What is the purpose of PEEP?” which of the following is an appropriate response by the nurse?

Correct Answer is D

Explanation

A nurse is caring for a client who has acute respiratory distress syndrome (ARDS), and requires mechanical ventilation. The client receives a prescription for pancuronium. The nurse recognizes that this medication is for which of the following purposes?

Correct Answer is A

Explanation

A nurse is caring for a client who has an endotracheal tube and is receiving mechanical ventilation. The client pulls out his endotracheal tube. Which of the following actions should the nurse take first?

A nurse is preparing to administer dextrose 5% in water (DW) 150 mL IV to infuse over 3 hr. The drop factor of the manual IV tubing is 10 gtt. The nurse should set the manual IV infusion to deliver how many gtt/min? (Round the answer to the nearest whole number. Do not use a trailing zero.)

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A nurse is caring for four clients who are postoperative from surgery 24 hr ago. At 1200 the nurse assesses the clients. Which of the clients is the nurse’s priority?

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A nurse is implementing the ventilator care bundle for a client who is receiving mechanical ventilation. Which of the following should the nurse expect to find in the bundle?

A nurse is assessing a client who has oxygen toxicity. Which of the following findings should the nurse expect?

A nurse is providing discharge teaching for a client who has a new prescription for home oxygen. Which of the following should the nurse include in the teaching?