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CCT > Ventilator Management > Flashcards

Ventilator Management Flashcards

1
Q

Vt

A

Tidal Volume
6-8 ml/kg
how much air the Pt breaths in a normal breath
the volume of air delivered per breath

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2
Q

IRV

A

Inspiratory reserve volume

The amount of air that can be forcefully inhaled after a normal tidal volume breath

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3
Q

ERV

A

Expiratory reserve volume

the amount of air that can be forcefully exhaled after a normal tidal volume breath

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4
Q

VC

A

Vital capacity

Vt+IRV+ERV=VC

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5
Q

RV

A

Residual Volume

the amount of air left in the respiratory tract following forceful exhalation

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6
Q

TLC

A

Total lung capacity

IRV+Vt+ERV+RV=TLC

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7
Q

Dead space

A

2ml/kg=dead space

the surfaces of airway that are not involved in gaseous exchange

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8
Q

F

A

Rate

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9
Q

Ve

A

Minute volume
FxVt
How much air is breathed in one minute

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10
Q

FiO2

A

Fraction of inspired oxygen
0.21-1 (21%-100%)
The ventilator feature that allows for very precise delivery of oxygen co cocentrations

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11
Q

I:E

A

Ratio of inspiration vs expiration

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12
Q

Pplat

A

Plateau Pressure

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13
Q

PEEP

A

Positive End Expiratory Pressure

PEEP is what keeeps the alveoli openso that oxygen can diffuse

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14
Q

PEFR

A

Peak Expiratory Flow Rate
500 to 700 L/min Males
380 to 500 L/min Females
A persons maximum speed of expiration, as measure with a peak flow meter

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15
Q

CMV

A

Controlled Mandatory Ventilation
Used in sedated, apneic,and paralyzed Pts
All Breaths are triggered,limited, and cycled by the ventilator
Pt has no ability to initiate their own breaths

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16
Q

SIMV

A

Synchronized Intermittent Mandatory Ventilation
Assisted mechanical ventilation synchronized with the Pt’s breathing
The ventilator senses the Pt taking a breath, then delivers a breath.
Spontaneous breathing by the pt occurs between the assisted mechanical breaths, which occur at preset intervals
if the Pt fails to take a breath the ventilator will provide a mechanical breath(backup rate can be set)
This mode is preferred for Pts with an intact respiratory drive
SIMV is similar to CPAP AND BIPAP because they are all spontaneously triggered by the Pt

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17
Q

AC

A

Assist- Controlled Ventilation

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18
Q

PSV

A

Pressure support ventilation
Pressure support makes it easier for the Pt to overcome the resistance of the ET tube and is often used during weaning because it reduces the work of breathing
Supports ventilation during inspiration
Pt determines tidal volumes, and rate
Requires consistent ventillatory effort by the Pt

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19
Q

CPAP/BPAP

A

Are similar to SIMV because they are all spontaneously triggered by the Pt

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20
Q

CPAP

A

Continuous Positive airway pressure
is the use of continuous positive pressure to maintain a continuous level of PEEP
CPAP uses mild air pressure to keep an airway open

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21
Q

BPAP

A

Bi-Level continous positive airway pressure
uses alternating levels of PEEP to maintain oxygenation, commonly used in pneumonia, COPD, asthma, etc…
BIPAP refers to a specific manufacturer, and technically is not a ventilator mode

22
Q

Low pressure alarm

A 
Pt disconnection from machine (most common cause)
Chest tube leaks
circuit leaks
airway leaks
hypovolemia
23
Q

High Pressure alarms

A 
Kinked line (most common cause)
coughing
secretions or mucus in the airway
Pt biting the tube
reduced lung compliance( Pneumothorax, ARDS)
increased airway resistance
24
Q

DOPE

A

Dislodged - Low pressure alarm
Obstructed- High pressure alarm
Pneumothorax- high pressure alarm
Equipment- (machine failure, dead batteries, etc…)

25
Q

Controlled

A

The Pts F, and Vt is controlled completely

26
Q

Intermittent

A

the Pt can take intermittent breaths (between controlled breaths)

27
Q

Synchronized

A

the ventilator synchronizes the delivery of breath with the PTs inspiratory drive

28
Q

Assist

A

The ventilator assists the Pts with their breathing(must have intact respiratory drive)

29
Q

ALI

A

Acute lung injury
Pulmonary condition characterized by hypoxemic respiratory failure, diffuse pulmonary infiltrates on CXR, pulmonary wedge pressure

30
Q

ARDS

A

Severe form of ALI differentiated by PaO2/FiO2 ratio

31
Q

Asynchrony

A

Incongruity between Pt’s respiratory effort and ventilator delivery
Increases work of breathing

32
Q

Auto- PEEP

A

Gas trapped in alveoli at the end of expiration caused by insufficient expiration time, bronchospasm, or mucous plugging. causes dyanmic alveolar hyperinflation, and increases work of breathing, also referred to as intrinsic PEEP

33
Q

Barotrauma

A

Damage to lung tissue from high airway pressures.

alveolar reupture may lead to pneumothorax, pulmonary interstitial edema, and pnumomediastinum

34
Q

Cyclic atelectasis

A

Repeated opening of alveoli on inspiration and collapsing on expiration

35
Q

Derecruitment

A

collapse of open alveoli

36
Q

dynamic alveolar hyperinflation

A

Increase in lung volume at end of expiration caused by incomplete exhalation

37
Q

Extrensic PEEP

A

mechanical application of PEEP

38
Q

Male IBW

A

50 kg + 2.3 for each inch over 5 ft (tauber says 3 for each inch)

39
Q

Female IBW

A

45.5 kg + 2.3 kg for each inch over 5 ft (tauber says 3 for each inch)

40
Q

Inspiratory flow

A

rate in which breath is delivered on ventilator. it is measured in LPM
higher the flow, faster the breath is delivered. flow is equal to tidal volume divided by inspiratory time(Ti)

41
Q

Ti

A

Inspiratory time

Time over which tidal volume is delivered or pressure maintained(depending on mode)

42
Q

Paw

A

average pressire to which lungs are exposed over one inspiratory/ expiratory cycle

43
Q

PaO2/FiO2 ratio

A

Calculation used to quantify to degree of hypoxemia and oxygenation abnormality in Pts with acute repiratory failure. PaO2 derived from arterial blood gas divided by the FiO2
Normal is 500
Pts with ALI are

44
Q

PIP

A

peak inspiratory Pressure

Measurement in lungs at peak of inspiration

45
Q

Permissive hypercapnia

A

Lung-Protective ventilation strategy that uses low tidal volumes to reduce lung injury, associated with high volumes, and alveolar overdistention. CO2 allowed to rise as consequence

46
Q

PEEP

A

Positive pressure maintained at end of expiration

therapy used in mechanical ventilation to increase volume of gas remaining in lungs at end of expiration (FRC)

47
Q

Plateau Pressure

A

Pressure exerted on small airways and alveoli , measured by holding the inspiratory pause during ventilator delivered inspiration
Plateau Pressure abover 30 mmhg have been associated with alveolar distention lung injury

48
Q

recruitment

A

refers to opening of collapsed alveoli
alveolar recruitment maneuvers refer to increasing PEEP, for short durations , to open collapsed alveoli and improve oxygenation
Level of PEEP. duration, and frequency of this manuver is determined by the clinician

49
Q

trigger- sensitivity

A

measure of amount of negative pressure that must be generated by the Pt to trigger mechanical ventilator into inspiratory phase

50
Q

Volutrauma

A

Volume related overdistention injury of alveoli inflicted by mechanical ventilation

CCT (10 decks)

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