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Flashcards in assisted ventilation Deck (22):
1

2 main types of assisted vent

1. positive pressure
2. negative pressure

2

2 types of neg pressures

1. iron lung
2. rocking bed

3

2 types of pos. pressure

1. non-invasive (BiPAP)
2. invasive - intubate

4

what 2 pressures need to be seton BiPAP

inspiratory and expiratory pressures

5

what determines size of TV in biPAP (2)

1. change in P
2. compliance of lungs

6

3 adv. of intubating

1. stable airway against collapse
2. some protection from macroaspiration
3. allows toileting

7

5 disadv. of intubating

1. uncomfortable
2. can damage airway
3. can't cough
4. can't talk
5. not total protection from macroaspiration

8

2 basic settings on PP vent

1. pressure mode - set pressure diff>volume will depend on compliance
2. volume mode - set volume>pressure will depend on compliance

9

2 names of 2 setting on pressure mode

1. PEEP - positive end exp. pressure
2. high/driving pressure

10

2 settings on volume mode

1. PEEP
2. volume

11

what determines O2 levels (2)

1. PEEP
2. FiO2

12

how does ventilation affect O2 and CO2

O2 - not required
CO2 - need to vent out CO2

13

formula for minute vent.

TV*Resp rate

14

what happens in too high FiO2

resorption atelectasis
O2 too soluble>absorbed too fast>unit collapes?shunt

15

probs with too high PEEP

need even higher driving P > impedes venous return > BP drops

16

what is autoPEEP

begin filling before expiration is totally done - overfill

17

how to detect autoPEEP

stop vent and look for flat line on curve before alveoli are empty

18

3 ways to fix autoPEEP

1. prolong expiration time - lower RR or incr insp. pressure
2. decrease obstruction - bronchdilator
3. match with extrinsic PEEP

19

what is key to PP vent

don't fix gases at cost of lungs

20

2 other ways to help V/Q mismatch

1. prone
2. NO

21

how does NO help

goes to ventilated portions and increase perfusion there

22

disadv. of NO

1. tachyphylaxis - drug tolerance
2. can cause methemoglobemias
3. expensive

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