Test 1 Ch.3 How a Breath is Delivered

Question 1

What are the mandatory volume controlled settings

Answer 1

• volume (Vt)
• RR
• Fio2
• PEEP
• Flow

Question 2

In volume control the….

Answer 2

volume and flow is controlled and pressure varies

Question 3

_____ and _______ waveforms will stay ___________, while ____________ waveform change based on _______ ______________

Answer 3

Vt
flow
constant
Pressure
lung mechanics

Question 4

What is a benefit of volume-control that is guaranteed?

Answer 4

Minute ventilation. B/c of Ve=RR x Vt (those 2 settings are already set)

Question 5

What mode is the easiest mode to normalize or correct ABGs?

Answer 5

Volume control

Question 6

In pressure control, the

Answer 6

pressure is controlled and volume and flow vary based on lung mechanics

Question 7

What mandatory settings are set in pressure control (5)

Answer 7

• inspiratory pressure ( can use this to manipulate Vt)
• RR
• Fio2
• PEEP
• I-time (inspiratory time)

Question 8

In pressure control you set the

Answer 8

I-time and the pt can do whatever flow they want throughout the i-time that was set

Question 9

What is the difference between volume and pressure control?

Answer 9

Volume: Vt and flow is controlled and pressure varies
Pressure: pressure is controlled and Vt and flow varies

Question 10

On a generic screen on the ventilator, there are 3 waveforms: volume, pressure, and flow. If a pt is in a volume-controlled mode, what 2 of the 3 waveforms will remain constant and which waveform will change?

Answer 10

• Volume and flow will remain constant
• Pressure will change based on lung mechanics

Question 11

Because the pressure varies in volume-control, what risks can come from that?

Answer 11

Barotrauma

Question 12

What is peak Flow normal range?

Answer 12

40- 80

Question 13

Where do we normally start with Flow?

Answer 13

60

Question 14

In pressure control, the VE….

Answer 14

varies over the breaths

Question 15

What are other names for Pressure-controlled ventilation?

Answer 15

• Pressure-targeted ventilation
• Pressure ventilation

Question 16

What are other names for Volume-controlled?

Answer 16

• Volume-targeted ventilation
• Volume ventilation

Question 17

pressure controller, the vent maintains the same pressure waveform at the……

Answer 17

mouth regardless of changes in lung characteristics

Question 18

volume controller, ventilator volume delivery, and volume waveform remain…

What’s measured?

Answer 18

constant and are not affected by changes in lung mechanics. Volume is measured

Question 19

Flow controller, ventilator volume delivery, and flow waveform remain…

What is measured?

Answer 19

constant and are not affected by changes in lung mechanics. Flow is measured

Question 20

In Time controller, the pressure, volume and flow curves can…

Answer 20

change as lung characteristics change. Time remains constant

Question 21

What is flow?

Answer 21

How fast will a pt get the volume that is set

Question 22

When the vent maintains the pressure waveform in a specific pattern, the breathing is described as…..

Answer 22

Pressure-controlled

Question 23

What is the most common cycling mechanism in the pressure support mode?

Answer 23

Flow cycling

Question 24

What are the two most common patient-triggering variables?

Answer 24

Pressure and flow

Question 25

What are the two primary control variables?

Answer 25

Pressure and volume

Question 26

A pt is in pressure-control mode and their airway resistance increases. What do you expect to happen next?

Answer 26

VT decreases

Question 27

In volume control if airway resistance increases then…

Answer 27

you will have an increased PIP

Question 28

During volume-control ventilation, lung compliance improves. This will cause..

Answer 28

PIP to decrease
(Increase in lung compliance is good)

Question 29

If lung compliance worsens (decreases) what will happen with PIP and why?

Answer 29

PIP will increase b/c lungs are getting stiffer