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Neo Pathophys 2 > HFV > Flashcards

HFV Flashcards

1
Q

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

A

No.

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2
Q

RCT’s show _____ advantage of HFV vs. CMV

A

No advantage

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3
Q

HFV is used with rates greater than_____/minute.

A

> 150 breaths/minute

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

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4
Q

With HFV, _____ _____ is smaller than the dead space

A

Tidal Volume

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5
Q

Oxygenate w/what HFV settings?

A

MAP/FRC

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6
Q

Is FRC w/HFV still crucial?

A

Yes

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7
Q

Oxygenation depends upon what with HFV?

A

MAP & FiO2

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8
Q

FRC is how you __________.

A

Oxygenate

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9
Q

Does the JET vent oxygenate the baby?

A

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

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10
Q

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

A

Remove CO2

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11
Q

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

A

No

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12
Q

W/JET vent, where do you read MAP?

A

On the JET vent

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13
Q

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

A

MAP (to maintain FRC)

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14
Q

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

A

PEEP

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15
Q

Don’t let the _____ fall when initiating JET vent

A

MAP

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16
Q

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

A

Vt
PEEP
PIP

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17
Q

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

A

Vt

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18
Q

Hz=

A

1/sec or 60/min

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19
Q

HFV Vt’s are ______

A

small

20
Q

w/HFV, ventilation happens via ______ _______

A

facilitated diffusion

21
Q

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

A

disperse
CO2
quickly

22
Q

You must have a _______ airway for facilitated diffusion to work

A

clear airway

23
Q

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

A

stream
injector
difficult

24
Q

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

A

small

facilitated

25
Q

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

A

In never out

In/off/in/off

26
Q

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

A

True

B/c you need passive exhalation

27
Q

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

A

Active exhalation

28
Q

_____ exhalation is better at getting rid of CO2.

A

Active (so HFV vs. JET)

29
Q

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

A

collapse–> air trapping

30
Q

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

A

MAP

31
Q

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

A

JET

32
Q

A recruiting breath is also called a ____ breath

A

Sigh

33
Q

With MAS you get _________ & _________.

A

Overinflation

Atelectasis

34
Q

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

A

AMP

35
Q

Is it easy or difficult to overinflate w/HFO?

A

Easy

36
Q

w/HFO, _____ controls CO2

A

Amplitude

37
Q

w/HFO, Rate is _________ r/t PaCO2

A

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

38
Q

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

A

contraindicated

39
Q

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

A

Recruit

Remove

40
Q

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

A

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

41
Q

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

A

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

42
Q

Is servo pressure a pressure?

A

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)

43
Q

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

A

Increase

44
Q

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

A

Decrease

45
Q

When might you see an elevated Servo pressure?

A

Air leak around ETT, pneumothorax, circuit tubing leak

46
Q

When might you see a decreased Servo pressure?

A

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

47
Q

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

A

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

Neo Pathophys 2 (20 decks)

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