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Mechanical Ventilation Exam #1
Terms in this set (40)
Which type of ventilator mimics the normal mechanism of ventilation?
negative pressure ventilation
The control panel where the respiratory therapist makes adjustments to the ventilator is also known as the
The gas conducting tubes that carry gas from the ventilator to the patient are referred to as the
Pneumatic ventilators are powered by
a 50 psi gas source
A ventilator system that simply delivers a set volume but cannot measure or change the volume actually delivered to the patient is called a(n) _______________ system
A patient who is paralyzed from the neck down is likely to have which breath sequence during mechanical ventilation?
In the equation Pmus+Pvent = (E x V) + (R x V) + Auto - PEEP, what does Pmus represent?
The pressure from the muscles to expand the thoracic cage and lungs
The equation Pmus + Pvent = (E + V) + (R x V) + Auto - PEEP is known as
Equation of motion
A respiratory therapist has chosen a mode of ventilation where mandatory breaths are delivered at a set rate, and the spontaneous breaths are pressure-supported. This mode of ventilation is called
Synchronized Intermittent Mandatory Ventilation (SIMV)
Another term for assist/control ventilation is
Continuous mandatory ventilation
If the respiratory therapist is using volume controlled, which of the following will change if there is a change in resistance or compliance?
The patient's medical team wants to maintain a constant tidal volume in the patient with acute head injury. Which of the following types of mechanical ventilation should be used?
Volume control ventilation
When using mechanical ventilation, a tidal volume should be chosen that maintains plateau pressure (Pplat) below which level, assuming a near-normal chest compliance?
Which of the following causes auto-PEEP?
High minute ventilation
Which of the following are contraindications for noninvasive ventilation?
Which of the following initial responses to noninvasive ventilation are indicative of a successful outcome for the patient?
A decrease in PaCO2
Higher baseline pH
The highest pressure recorded during inspiration on the ventilator is called the
Peak Inspiratory Pressure (PIP)
The pressure difference between the airway opening and the alveolus is the
The normal compliance of a spontaneous breathing patient is
50 to 170 ml/cmH2O
What is the normal airway resistance for an intubated patient?
What type of mechanical ventilation attempts to mimic the function of the respiratory muscles to allow breathing through normal physiological mechanisms?
negative pressure ventilation
Which pressure is used as an estimate of alveolar pressure?
760 mmHg =
How many tim constants does it take to exhale 100% of the tidal volume?
20 mmHg is equal to
Another term for auto-PEEP, which usually occurs when there is not enough time for exhalation
What variable begins the inspiratory phase of a ventilator breath
The variable that ends the inspiratory phase is called the
Decreased lung compliance during time cycled PCV will cause
decreased volume delivery
When a maximum pressure setting (high pressure alarm) on an adult ventilator using volume control is reached, what usually happens?
Inspiration ends prematurely
What is the average pressure in the lungs throughout the respiratory cycle?
Which of the following will increase the mean airway pressure (MAP)
Calculate the static compliance, when the PIP is 47 cmH20, plateau pressure is 27 cmH20, PEEP is 10 cmH20 and exhaled tidal volume is 725 ml
Calculate airway resistance for a ventilator patient with the following information: PIP 20 cmH20, Plat 15 cmH20, PEEP 5 cmH20, set flow rate 50 L/min
6 cmH20 L/sec
The pressure required to maintain alveolar inflation is known as which of the following
Which of the following will increase the expiratory time for a patient who is not triggering the ventilator in A/C VCV?
increase peak flow
Plateau pressure may be obtained on a volume ventilator by using a(n)
An increase in PIP without an increase in Pplateau is associated with what change?
increase in airway resistance
If a patient has a VT of 450 mL and her RR is 15 bpm, what is her minute ventilation?
Which of the following choices represents the normal and critical value, respectively, for maximum inspiratory pressure (MIP) expressed in cmH20?
-100 to -50 and -20 to 0
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