Mechanical Ventilation During Large Animal Anesthesia

Front 1

What are the advantages of using mechanical ventilation?

Back 1

Prevent atelectasis/activate pulmonary surfactant
Prevent hypercarbia and respiratory acidosis
Improve arterial oxygen tension
Good management tool

Front 2

Indications for use of mechanical ventilation?

Back 2

Hypoventilation
Hypoxemia
Prolonged surgical procedures
Abdominal tympany
Thoracic surgery
During use of muscle relaxants

Front 3

Disadvantages of manual ventilation?

Back 3

Inconsistent
Burdensome
Tedious

Front 4

Settings for mechanical ventilator for large animals?

Back 4

Tidal volume: 15-20 ml/kg
Frequency: 10-12 breaths/min
Minute volume: 150-240 ml/kg
Inspiratory pressure: 20-30 cmH2O
Inspiratory time: 1-3 seconds

Front 5

Possible complications of mechanical ventilation?

Back 5

Hypoventilation
Hyperventilation
Hypotension
Barotrauma

Front 6

What are the advantages of using mechanical ventilation?

Back 6

Prevent atelectasis/activate pulmonary surfactant
Prevent hypercarbia and respiratory acidosis
Improve arterial oxygen tension
Good management tool

Front 7

Indications for use of mechanical ventilation?

Back 7

Hypoventilation
Hypoxemia
Prolonged surgical procedures
Abdominal tympany
Thoracic surgery
During use of muscle relaxants

Front 8

Disadvantages of manual ventilation?

Back 8

Inconsistent
Burdensome
Tedious

Front 9

Settings for mechanical ventilator for large animals?

Back 9

Tidal volume: 15-20 ml/kg
Frequency: 10-12 breaths/min
Minute volume: 150-240 ml/kg
Inspiratory pressure: 20-30 cmH2O
Inspiratory time: 1-3 seconds

Front 10

Possible complications of mechanical ventilation?

Back 10

Hypoventilation
Hyperventilation
Hypotension
Barotrauma
Anesthetic overdosage

Front 11

What are the proper ranges for CO2 on capnography and blood gas analysis?

Back 11

Capnography ETCO2: 30-40 mmHg
Blood gas analysis PaCO2: 40-45 mmHg

Front 12

How much time should you take to wean the animal off the ventilator before it can breath on its own?

Back 12

Usually 5-10 minutes
Decrease minute volume by 50% by decreasing tidal volume or frequency (preferred)