Controlled ventilation

Question 1

spontaneous ventilation creates _________ pressure in chest

Answer 1

negative

Question 2

controlled ventilation creates _________ pressure in chest

Answer 2

positive

increased positive pressure around lungs and heart = decreased CO

Question 3

Paw =

Answer 3

flow x resistance + volume/compliance + PEEP

Question 4

anesthesia ventilator

Answer 4

• constant FiO2
• no PEEP
• no humidity

Question 5

if there is a hole in the bellow, animal will get __________ plane of anesthesia

Answer 5

light

Question 6

types of bellows

Answer 6

• ascending bellow
  
  • preferred
• descending bellow
  
  • doesn’t let you know if there is a disconnection of system

Question 7

compliance

Answer 7

change in volume / change in pressure

Question 8

indications for ventilator

Answer 8

low Fi[O2]

hypoventilation

shunt

V/Q mismatch

ventilator will not fix diffusion impairment

Question 9

how to treat extrathoracic tracheal collapse

Answer 9

there is increased resistance

change ventilator settings to change I:E ratio

long inspiration

Question 10

how to treat aspiration pneumonia when ventilating

Answer 10

there is increased compliance

use PEEP-change compliance

don’t let patient exhale all the way in order to prevent lung from collapsing because surfactant is damaged

Question 11

PEEP _________ cardiac output

Answer 11

decreases