Exam 12: Introduction to Ventilators

The figure shows the pressure-time scalar for a pressure-support breath.To alleviate the problem depicted in this figure,the respiratory therapist should do which of the following?

The mandatory breath begins as a pressure-controlled breath,but it switches to volume control during inspiration because a preset volume is not achieved. This describes which of the following control types?

The added clinical benefit of secretion removal is facilitated with which high-frequency mode of ventilation?

The description "a mode where each breath is pressure limited and the pressure-limit level is adjusted automatically between breaths by using ventilatory mechanics to minimize the patient's work of breathing" pertains to which ventilator control type?

A patient is receiving continuous positive airway pressure from a freestanding,continuous-flow system.The respiratory therapist notices the pressure-release valve venting on each patient exhalation.What action should the respiratory therapist take?

A closed-loop ventilator system can be described as which of the following? 1)Feedback 2)Hierarchical 3)Unintelligent 4)Servo-controlled

The gas that enters the ventilator from high-pressure sources goes directly to the patient.This is a description of a _____ system.

During pressure-targeted ventilation with volume guaranteed for every breath,the set volume is not met.Which of the following phase variables would cycle that breath?

Which two of the following patient triggers are most common? 1)Flow 2)Neural 3)Volume 4)Pressure

Pressure-support ventilation is classified as: 1)Flow cycled 2)Time triggered 3)Volume targeted 4)Pressure targeted 5)Patient triggered

What is the static lung compliance when the returned tidal volume is 500 mL,the baseline pressure is zero,and the plateau pressure reading is 25 cm H₂O?

What procedure is used to estimate the amount of air trapped in the patient's lungs and in the patient circuit?

The flow,volume,and pressure waveforms characteristic of a pressure-limited,time-cycled breath are represented in which column of the figure?

Which of the following control modes of ventilation consists of ventilator output automatically following a varying input (e.g.,volume or flow generated by the patient)?

If the base flow is 10 L/min and the flow-trigger setting is 4 L/min,the flow during the expiratory phase is _____ L/min.

With a baseline pressure setting of 6 cm H₂O and a sensitivity setting of -1.5 cm H₂O,inspiration will begin at _____ cm H₂O.

What variable begins the inspiratory phase of a ventilator?

The pressure maintained at the airway during exhalation is known as which of the following?

A patient receiving continuous positive airway pressure of 7.5 cm H₂O via a mask and freestanding system appears to be in distress.The patient is using accessory muscles and is diaphoretic. The manometer is fluctuating between -5 cm H₂O on inspiration and 7.5 cm H₂O on expiration.The most apparent cause of the patient's distress is which of the following?

On a mechanical ventilator,pressure triggering is usually set within which of the following ranges?