Mechanical ventilation chapter 5 Exam with
Answers 100% Verified & Rated A+
what is another term used to describe Paug? ✔✔ volume-assured pressure support (VAPS)
in Paug, if the set volume is achieved prior to flow cycling, what will happen to the breath? ✔✔
the breath is volume cycled
in Paug, if the set volume is not reached before flow drops to the set level, how will the
ventilator respond? ✔✔ maintains the flow at its set value until the volume is delivered (volume
cycled).
describe a clinical scenario where the pt can receive more volume than is set by the clinician in
Paug ✔✔ the patient's inspiratory flow demand is high enough to prevent maintenance of the
set pressure level. This causes the ventilator to provide additional flow to the patient.
describe PRVC in terms of trigger, limit, and cycle ✔✔ patient or time triggered, pressure limited
(volume targeted), and time cycled.
generally, at what pressure will a ventilator alarm while in the PRVC mode if the upper pressure
limit is set at 40 cmH2O and the Vt is set at 600 ml? ✔✔ The ventilator will not allow the
pressure to rise higher than 5 cm H2O below the upper pressure limit setting. Therefore, at 35
cm H2O, the alarm will activate.
describe volume support ventilation (VSV) in terms of trigger, limit, and cycle ✔✔ Patient
triggered (pressure or flow triggered), pressure limited (volume targeted), and flow cycled
what is the difference between PRVC and VSV? ✔✔ PRVC: inspiration can be either time
triggered or patient triggered. breath is time cycled,
, VS: inspiration is only patient triggered. breath is usually flow cycled (it may pressure cycle if
pressure rises too high or time cycle if the inspiratory time is extended for some reason).
define Mandatory minute ventilation (MMV), also called minumum minute ventilation or
augmented Ve ✔✔ used primarily for weaning patients from the ventilator.
It allows the operator to set a minimum minute ventilation, which usually is 70-90% of the
patient's current Vt . The ventilator provides whatever part of the minute ventilation that the
patient is unable to accomplish by increasing the breathing rate or by increasing the preset
pressure. The ventilator monitors the patient's spontaneous breathing and provides additional
ventilatory support if the patient does not achieve the set . If a patient increases the level of his
or her spontaneous ventilation, the ventilator reduces its amount of support.
In MVV, what alarms must be set to protect against problems associated with rapid, shallow
breathing? ✔✔ the high rate alarm and the low VT alarm
the mode of ventilation that requires two levels of CPAP and allows the pt to breath
spontaneously at both levels is known as ✔✔ Airway pressure-release ventilation (APRV)
the optimum duration of the release time for APRV is a function of the ___________ of the
respiratory system ✔✔ time constant
APRV was originally intended to ventilate pts with ✔✔ stiff lungs
with PAV, what three variables are proportional to the pts spontaneous effort? ✔✔ 1.Pressure
2. flow
3. volume delivery
Answers 100% Verified & Rated A+
what is another term used to describe Paug? ✔✔ volume-assured pressure support (VAPS)
in Paug, if the set volume is achieved prior to flow cycling, what will happen to the breath? ✔✔
the breath is volume cycled
in Paug, if the set volume is not reached before flow drops to the set level, how will the
ventilator respond? ✔✔ maintains the flow at its set value until the volume is delivered (volume
cycled).
describe a clinical scenario where the pt can receive more volume than is set by the clinician in
Paug ✔✔ the patient's inspiratory flow demand is high enough to prevent maintenance of the
set pressure level. This causes the ventilator to provide additional flow to the patient.
describe PRVC in terms of trigger, limit, and cycle ✔✔ patient or time triggered, pressure limited
(volume targeted), and time cycled.
generally, at what pressure will a ventilator alarm while in the PRVC mode if the upper pressure
limit is set at 40 cmH2O and the Vt is set at 600 ml? ✔✔ The ventilator will not allow the
pressure to rise higher than 5 cm H2O below the upper pressure limit setting. Therefore, at 35
cm H2O, the alarm will activate.
describe volume support ventilation (VSV) in terms of trigger, limit, and cycle ✔✔ Patient
triggered (pressure or flow triggered), pressure limited (volume targeted), and flow cycled
what is the difference between PRVC and VSV? ✔✔ PRVC: inspiration can be either time
triggered or patient triggered. breath is time cycled,
, VS: inspiration is only patient triggered. breath is usually flow cycled (it may pressure cycle if
pressure rises too high or time cycle if the inspiratory time is extended for some reason).
define Mandatory minute ventilation (MMV), also called minumum minute ventilation or
augmented Ve ✔✔ used primarily for weaning patients from the ventilator.
It allows the operator to set a minimum minute ventilation, which usually is 70-90% of the
patient's current Vt . The ventilator provides whatever part of the minute ventilation that the
patient is unable to accomplish by increasing the breathing rate or by increasing the preset
pressure. The ventilator monitors the patient's spontaneous breathing and provides additional
ventilatory support if the patient does not achieve the set . If a patient increases the level of his
or her spontaneous ventilation, the ventilator reduces its amount of support.
In MVV, what alarms must be set to protect against problems associated with rapid, shallow
breathing? ✔✔ the high rate alarm and the low VT alarm
the mode of ventilation that requires two levels of CPAP and allows the pt to breath
spontaneously at both levels is known as ✔✔ Airway pressure-release ventilation (APRV)
the optimum duration of the release time for APRV is a function of the ___________ of the
respiratory system ✔✔ time constant
APRV was originally intended to ventilate pts with ✔✔ stiff lungs
with PAV, what three variables are proportional to the pts spontaneous effort? ✔✔ 1.Pressure
2. flow
3. volume delivery
