03: IPPB Flashcards

1
Q

Define IPPB

A

Intermittent positive pressure breathing

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2
Q

Goals of IPPB

A
#1 short term vent support
Lung expansion
Deliver aerosol (pt w muscle fatigue)
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3
Q

Indications for IPPB

A
#1 true: increase ventilation in pt unable to take deep breath
Unsuccessful IS
Prevent/treat atelectasis
Inability to move secretions/cough
Alternate to mechanical ventilation
Decrease dyspnea
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4
Q

Absolute contraindication of IPPB

A

Untreated tension pneumothorax

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5
Q

Relative contraindications for IPPB

A
Increased ICP
Face surgery
Tracheoesophogeal fistula
Nausea
TB
Hemoptysis
Hemodynamic instability
Blebs (increases barotrauma)
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6
Q

IPPB tx hazards

A
#1: increased Raw and WOB
Barotrauma
Hyperventilation
Hyperoxia
O2 induced hypoventilation
Decreased venous return
Increased alveolar dead space
Impacted secretions
Increase VQ mismatch
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7
Q

How to minimize decreased venous return

A

Decrease pressure to increase ventilation

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8
Q

Adverse reactions to IPPB

A

Pneumothorax

Pulmonary edema

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9
Q

Patients benefitting from IPPB

A

Atelectasis
Neuromuscular diseases
Abnormal chest circumference -> decreased LV

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10
Q

IPPB effect on WOB

A

Decrease

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11
Q

IPPB effect on ventilation

A
Decreased dyspnea (increasing Vt)
Increased oxygenation (1:2)
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12
Q

IPPB blood gas measurements during tx

A

Increased V/Q
Increased PaO2
Decreased PaCO2
N/increased pH

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13
Q

IPPB effect on cardiovascular function

A

Improved HR

Decreased venous return

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14
Q

IPPB order should include

A

Tx to be delivered
Frequency
Duration
Medication

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15
Q

What to monitor during IPPB therapy

A
Machine performance (sensitivity, peak pressure, inspiratory time, FiO2)
Delivered Vt
Pt response (appearance/sensorium/LOC)
VS
Other: skin color, sputum, ICP, CXR
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16
Q

Bird Mark 7 operational principles

A
Pneumatic
Pt triggered (pressure cycled)
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17
Q

What is pressure cycled

A

Inspiration ends when pressure preset limit has been reached

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18
Q

Initial setting for Bird Mark 7

A

10-15 cmH2O

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19
Q

Bird Mark 7 controls

A
Pressure (cycle/stop)
Sensitivity (trigger)
Flow
Air dilution
Expiratory timer
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20
Q

Bird mark procedure

A
Set driving pressure (PIP)
Pt triggers machine (decreasing line pressure(
Gas moves to aw
Preset PIP reached (gas shuts off)
Inspiratory phase cycled off
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21
Q

Bird mark 7 trouble shoot: breath/machine wont cycle on

A

High pressure line -> gas source
Turn on flow
Check sensitivity -> set to autocycle -> then turn back a little
Tight seal, nose clips, etc

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22
Q

Bird Mark 7 troubleshoot: dizzy/finger tingle/light headedness

A

Pt breathing too deep: relax

Hyperventilation: slow RR

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23
Q

Bird Mark 7 troubleshoot: no cycle off

A
Check flow rate (might be too slow)
Check for leaks
Tight seal
Check mushroom valve
Nebline/cup
Mainline
For leaks
24
Q

Birdmark troubleshoot: inhalation >1-1.5 sec

A

Flow too slow
Check for: small leaks, manometer pressure, air mix
Air mix 100%? Loss of air entrainment, increase flow

25
Q

Bird mark troubleshoot: breath starts too easily

A

Sensitivity too low

Machine triggers by itself? Autocycle

26
Q

Bird mark troubleshoot: no steady rise in manometer on inspiration

A

Pt over breathing flow

Increased set flow

27
Q

What to document post IPPB

A

Pre/post VS
Dosage and diluent
Untoward responses
Duration

28
Q

Assist mode

A

Only pt can trigger

29
Q

Assist/control mode

A

Set # of bpm, but pt can trigger additional

30
Q

Control mode

A

Triggers only at pre-set frequency

31
Q

Exhalation valve

A

Gas only to pt on inspiration, cycles off

Passive exhalation via same circuit

32
Q

Flow rate

A

How fast pressure limit reached
Increased flow = decreased inspiratory time
Decreased flow = increased inspiratory time
1-1.5 sec

33
Q

Pressure limit

A

Change in LC
Decreased Lung compliance = decreased tidal volume
Increased LC = increased Vt

34
Q

Too much pressure leads to

A

Increased alveolar dead space, barotrauma, and decreased venous return

35
Q

Percent oxygen able to be delivered w bird mark

A

40% or 100%

36
Q

Minimum delivered Vt

A

1/3 predicted inspiratory capacity

37
Q

IC calculation

A

50 ml/kg of ideal body weight

38
Q

Ideal body wt calculation

A

Males: 50 + 2.3(ht (in) - 60)
Females: 45.5 + 2.3(ht - 60)

39
Q

Increased Mean Alveolar Pressure means there is a

A

Greater potential for decreased venous return

40
Q

Factors affecting delivered FiO2

A

Pt LC
Set flow rate
Pressure limit
Venturi gate function

41
Q

Volume cycled

A

Delivers certain volume then stops

42
Q

Flow capability of bird mark

A

80 lpm in air mix

50 lpm in 100% O2

43
Q

Pressure chamber

A

Pt filter (R on machine)

44
Q

Ambient chamber

A

Filter (L on machine)

45
Q

Optimal breathing technique (rate, I:E, insp. Hold)

A

6-8 bpm
1:2
3-5 seconds

46
Q

Length of inspiration in pressure cycled ventilator

A

Determined by pre-set pressure and pt compliance?

47
Q

Sensitivity control determines

A

Negative pressure needed to trigger inspiration

48
Q

Pressure control determines

A

Change in lung compliance with positive pressure ventilation

49
Q

Pt most prone to barotrauma

A

Pt with emphysematous blebs

50
Q

Flow rate determines

A

How fast pressure limit can be reached

51
Q

What entrains air in bird

A

Ambient chamber

52
Q

Alveolar dead space causes

A

Decreased capillary bf return

53
Q

If the sensitivity is too low the machine will

A

Autotrigger

54
Q

Pressure manometer measures

A

How much pressure going to pt

55
Q

How to identify leak in pressure/volume cycled ventilator

A

Won’t cycle off

56
Q

Assess effectiveness of IPPB

A
Increased PEF rate
Vt 1/3 predicted vol
Improved cough/secretion clearance
Reduced dyspnea
Improved oxygenation