Which statement by the nurse when explaining the purpose of positive end-expiratory pressure (PEEP) to the patient's caregiver is accurate?
"PEEP prevents the lung air sacs from collapsing during exhalation."
"PEEP allows the breathing machine to deliver 100% 02 to the lungs."
"PEEP will push more air into the lungs during inhalation."
"PEEP will prevent lung damage while the patient is on the ventilator."
The Correct Answer is A
A. Positive end-expiratory pressure (PEEP) is applied during mechanical ventilation to prevent alveolar collapse at the end of expiration. It helps maintain the patency of the alveoli, improving oxygenation and preventing atelectasis.
B. While PEEP can improve oxygenation by recruiting collapsed alveoli and increasing functional residual capacity, it does not directly affect the concentration of oxygen delivered by the ventilator. Oxygen concentration is adjusted separately from PEEP settings.
C. PEEP is applied at the end of expiration to maintain positive pressure in the airways and alveoli, preventing them from collapsing. It does not directly affect the delivery of air during inhalation.
D. PEEP can help prevent lung damage by maintaining alveolar recruitment and reducing the risk of atelectasis and barotrauma. However, it is not the sole factor in preventing lung damage, and other ventilator settings and strategies also play a role in protecting the lungs.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
B. This is advised to prevent hypoxemia, which can manifest as tachycardia and arrhythmia, conditions indicated by an increased and irregular heart rate. Pre-oxygenation helps maintain adequate oxygen levels in the blood, which can be compromised during the suctioning process.
A. Obtaining a cardiology consult might be necessary if the client's heart rate increases and becomes irregular. However, it's not the immediate action the nurse should take. This option is more appropriate for addressing the underlying cause of the client's dysrhythmia rather than the immediate management during suctioning.
C. Suctioning the client less frequently might be appropriate if the client's response to suctioning is causing distress or physiological changes like increased heart rate. However, if suctioning is necessary due to secretions in the airway, simply reducing the frequency might not be sufficient to address the client's cardiovascular response.
D. Administering an antidysrhythmic medication should be considered if the client's heart rate increases and becomes irregular during or after suctioning, especially if the dysrhythmia persists or worsens.
However, this should be done under the guidance of a healthcare provider and after assessing the client's overall condition, including potential causes of the dysrhythmia.
Correct Answer is D
Explanation
D Sedatives are typically administered alongside neuromuscular blockers to ensure the patient's comfort and prevent awareness during mechanical ventilation.
A The absence of a cough reflex when suctioned is expected in a patient receiving cisatracurium (Nimbex) because it is a neuromuscular blocking agent that induces paralysis. Cisatracurium inhibits skeletal muscle movement, including the muscles involved in coughing.
B An oxygen saturation between 90% to 93% is within an acceptable range for a patient in this condition.
C The lack of response to voice may indicate that the patient is sedated or experiencing effects from the neuromuscular blocking agent. However, since the patient is receiving cisatracurium to prevent asynchronous breathing with the positive pressure ventilator, it's expected that the patient will not respond to voice due to the medication-induced paralysis.
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