HFV

Question 1

W/HFV, are the potential hazards of Mechanical ventilation eliminated?

Answer 1

No.

Question 2

RCT’s show _____ advantage of HFV vs. CMV

Answer 2

No advantage

Question 3

HFV is used with rates greater than_____/minute.

Answer 3

> 150 breaths/minute

-conventional vents are not allowed to go over 150 breaths/minute

Question 4

With HFV, _____ _____ is smaller than the dead space

Answer 4

Tidal Volume

Question 5

Oxygenate w/what HFV settings?

Answer 5

MAP/FRC

Question 6

Is FRC w/HFV still crucial?

Answer 6

Yes

Question 7

Oxygenation depends upon what with HFV?

Answer 7

MAP & FiO2

Question 8

FRC is how you __________.

Answer 8

Oxygenate

Question 9

Does the JET vent oxygenate the baby?

Answer 9

No, it’s the CMV connected to the JET that oxygenates baby (CPAP, PEEP, FiO2)

Question 10

What is the ONLY thing you do with a JET ventilator?

Answer 10

Remove CO2

Question 11

Would you ever place a baby on JET just for poor oxygenation?

Answer 11

No

Question 12

W/JET vent, where do you read MAP?

Answer 12

On the JET vent

Question 13

______ is often the most critical value in determining optimal gas exchange (oxygenation) as it correlates with lung volume.

Answer 13

MAP (to maintain FRC)

Question 14

W/the JET vent, you have to go up on the _____ to maintain the MAP

Answer 14

PEEP

Question 15

Don’t let the _____ fall when initiating JET vent

Answer 15

MAP

Question 16

To avoid barotrauma caused by increased ____when using the JET vent, increase ______, and decrease _____.

Answer 16

Vt
PEEP
PIP

Question 17

Alveolar MV = ____- dead space x RR. You should not be able to ventilate with HFV, but you can.

Answer 17

Vt

Question 18

Hz=

Answer 18

1/sec or 60/min

Question 19

HFV Vt’s are ______

Answer 19

small

Question 20

w/HFV, ventilation happens via ______ _______

Answer 20

facilitated diffusion

Question 21

Facilitated diffusion makes it easier to ______ the molecules of _____ very ______.

Answer 21

disperse
CO2
quickly

Question 22

You must have a _______ airway for facilitated diffusion to work

Answer 22

clear airway

Question 23

HFV via JET vent is a continuous _______ of gas through an ________, humidification is _________.

Answer 23

stream
injector
difficult

Question 24

An oscillator uses ____Vt’s, rapid rate, and _________ exhalation via a piston (pushes and pulls gas in/out).

Answer 24

small

facilitated

Question 25

With a Jet, the constant stream of gas is always ___ never ___. It's ___-off-__-off.

Answer 25

In never out In/off/in/off

Question 26

T/F: With Jet ventilation there's a limit to how fast you can ventilate. Why or why not?

Answer 26

True B/c you need passive exhalation

Question 27

The oscillator is the only vent to use what kind of exhalation

Answer 27

Active exhalation

Question 28

_____ exhalation is better at getting rid of CO2.

Answer 28

Active (so HFV vs. JET)

Question 29

W/active exhalation, there may be ______ (choke points).

Answer 29

collapse--> air trapping

Question 30

With a homogenous lung and an open airway, turn up the ____ until they are oxygenated.

Answer 30

MAP

Question 31

A non-homogenous lung is much better to use with the _____ ventilator.

Answer 31

JET

Question 32

A recruiting breath is also called a ____ breath

Answer 32

Sigh

Question 33

With MAS you get _________ & _________.

Answer 33

Overinflation | Atelectasis

Question 34

With HFV, ventilation (removing CO2) depends on ______ (Vt) and Rate.

Answer 34

AMP

Question 35

Is it easy or difficult to overinflate w/HFO?

Answer 35

Easy

Question 36

w/HFO, _____ controls CO2

Answer 36

Amplitude

Question 37

w/HFO, Rate is _________ r/t PaCO2

Answer 37

Inversely related (the piston has more time to move a greater volume, the Vt increases so much more)

Question 38

It is ____________ to use a sigh breath when you have air leaks w/JET vent.

Answer 38

contraindicated

Question 39

The PIP on the conventional vent is to ______ lung, the PIP on the Jet vent is to ______ CO2.

Answer 39

Recruit | Remove

Question 40

Why doesn't a high PIP on JET vent injure the lung?

Answer 40

It doesn't transmit to the Alveoli b/c the IT is about 0.02 seconds.

Question 41

Vt's w/JET vent are approx ____ times smaller than conventional vent Vt's

Answer 41

10 times smaller--allowing higher levels of PEEP to be used safely to maintain open lungs and MAP for oxygenation

Question 42

Is servo pressure a pressure?

Answer 42

No--it's the amount of gas that it takes to do what you just told the JET to do. (amt of gas the ventilator is requiring)

Question 43

W/increased Servo pressure, there is perceived _________ in lung volume/compliance/resistance.--there is more volume to ventilate.

Answer 43

Increase

Question 44

W/decreased Servo pressure, there is perceived ________ in lung volume/compliance/resistance.

Answer 44

Decrease

Question 45

When might you see an elevated Servo pressure?

Answer 45

Air leak around ETT, pneumothorax, circuit tubing leak

Question 46

When might you see a decreased Servo pressure?

Answer 46

Obstructed ETT, Tension Pneumo, Rt. Mainstem, Pt needs suctioning

Question 47

The goal with weaning off the JET vent is to ___________.

Answer 47

Extubate. You do not need to wean to CMV first.