The nurse is caring for a mechanically ventilated patient being monitored with a left radial arterial line. During the inspiratory phase of ventilation, the nurse assesses a 20 mm Hg decrease in arterial blood pressure. What is the best interpretation of this finding by the nurse?No sweat, you're still learning!The mechanical ventilator is malfunctioning.The patient may require fluid resuscitation.The arterial line may need to be replaced.The left limb may have reduced perfusion.
Question
The nurse is caring for a mechanically ventilated patient being monitored with a left radial arterial line. During the inspiratory phase of ventilation, the nurse assesses a 20 mm Hg decrease in arterial blood pressure. What is the best interpretation of this finding by the nurse?No sweat, you're still learning!The mechanical ventilator is malfunctioning.The patient may require fluid resuscitation.The arterial line may need to be replaced.The left limb may have reduced perfusion.
Solution
The best interpretation of this finding by the nurse is that the patient may require fluid resuscitation. This is because a decrease in arterial blood pressure during the inspiratory phase of ventilation can be a sign of pulsus paradoxus, which is often associated with hypovolemia (low blood volume). Hypovolemia can be treated with fluid resuscitation. The other options are less likely because a malfunctioning ventilator or a problem with the arterial line would likely cause consistent problems, not just during the inspiratory phase. Reduced perfusion in the left limb would not typically cause a decrease in arterial blood pressure during the inspiratory phase.
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