Quiz week 5 CC2 2023

Positive pressure ventilation creates a transairway pressure gradient by decreasing the alveolar pressures to a level below the airway opening pressure.

• True

• False

When using a speaking valve in mechanically ventilated patients, an air leak may require careful and periodical adjustments of what (more then one answer possible)

• expiratory reserve volume

• inspiratory reserve volume

• Peep

• Alarms

• Tidal Volume

Frequent and inappropriate ET suctioning can cause mucosal damage and increase the incidence of suction-induced hypoxemia and______.

• pneumonia

• arrhythmias

• bronchial perforation

• pulmonary edema

A curved blade______?

• lifts the tongue only

• functions better in patients with short necks

• lifts the tongue and epiglottis

• functions better in obese patients

.   During VS, the ventilator what

are determined by the triggering effort of the patient. (Multiple answers possible)

• Frequency

• Tidal Volume

• Minute Ventilation

• Inspiratory time

Which of the following is especially useful in preventing hypoventilation and respiratory acidosis in the final stages of weaning with SIMV when the patient’s spontaneous breathing is assuming a significant portion of the total minute volume?

• PRVC

• MMV

• VV+

• PAV

What are the three major indications for PEEP?

Answer explanation

The primary indication for PEEP is refractory hypoxemia induced by intrapulmonary shunting. Second, decreased functional residual capacity (FRC) and lung compliance. Third, auto-PEEP not responding to adjustments of ventilator settings.

Explain the advantages of AC mode.

Answer explanation

There are two primary advantages with the AC mode. First, the patient’s work of breathing requirement in the AC is very small when the triggering sensitivity (pressure or flow) is set appropriately and the ventilator supplies an inspiratory flow that meets or exceeds the patient’s inspiratory flow demand. The second advantage of AC is that if the patient has an appropriate ventilatory drive, this mode allows the patient to control the frequency and therefore the minute volume required to normalize the patient’s PaCO2.

Discuss the disadvantages and complications associated with the iron lung type of negative pressure ventilator.

Answer explanation

Disadvantages and complications associated with the iron lung type of negative pressure ventilator are (1) poor patient access and (2) potential for a decreased cardiac output known as “tank shock”. Since the iron

lung encloses the patient, it restricts access to the patient for routine health care. Tank shock may result from a decreased venous blood return to the right atrium.

PRVC is used primarily to achieve volume support while keeping the peak inspiratory pressure (PIP) at a lowest level possible.

• True

• False