pdf_ANESTHETIC_BREATHING_SYSTEMS.pdf

ANESTHESIA MACHINES

AND EQUIPMENT

V M E D 5 2 6 7

V E T E R I N A R Y A N E S T H E S I O L O G Y

L O U I S I A N A S T A T E U N I V E R S I T Y - V T H & C

D R . A N D E R S O N D A C U N H A

ANESTHESIA MACHINES

 Highly sophisticated equipment

 SAFELY and ACCURATELY

 complex but common design principles

ANESTHESIA MACHINES – concept

 2 separate units:

 The “mixing” machine

 combines the carrier gas with the anesthetic vapor.

 “fresh gas”

 the carrier gas plus the anesthetic vapor

 The breathing circuit

 Rebreathing

 non-rebreathing

Anesthesia machines - functions

 Deliver oxygen to patient

 Remove exhaled carbon dioxide

 Deliver anesthetic agent to patient in a controlled

manner

 Provide a mechanism to assist or control ventilation of

the patient

 Provide a mechanism for the scavenging of waste gases,

thereby reducing environmental pollution.

Anesthesia machines - Improper use

 Excessive resistance to ventilation

 Hypoxia

 Hypercapnia

 Excessive pressure transmitted to lungs

 Anesthetic overdose AND DEATH