The Anesthesia gas machine is a device which delivers a precisely known but variable gas mixture ,including anesthetizing and life sustaining gases. There are several difference between newer and older anesthesia machines. Advanced ventilators are the biggest difference between newer and older gas machine.

1. By
SATHISHKUMAR G
(sathishsak111@gmail.com)

2.  The Anesthesia gas machine is a device which
delivers a precisely known but variable gas
mixture ,including anesthetizing and life
sustaining gases.
 There are several difference between newer and
older anesthesia machines.
 Advanced ventilators are the biggest difference
between newer and older gas machine.

3.  Boyle Anesthetic machine is a continuous-flow type of
machine used for administration of inhalational
anesthetic agents.
 It Was introduced by HENRY EDMUND GASKIN BOYLE
in 1917.
 It has undergone modifications
 1920-1926 vapourizer bottles added
 1930 plunger device in vaporizes bottle
 1933 dry bobbin type of flow meter instead of water
sight-feed type
 1937 rotameters replaced dry bobbin type of flow

4.  INTERMITTENT –Gas flow only during inspiration
 (e.g) : Entonox appartus , Mackessons
 CONTINUOUS-Gas flows both during inspiration
and expiration
 (e.g) : Boyle machine , forregar , dragger

5.  Comprises of 3 different pressure systems
 HIGH PRESSURE SYSTEM: from cylinder to
pressure reducing valves.
 INTERMEDIATE PRESSURE SYSTEM: from
pressure reducing valves to flow meters.
 LOW PRESSURE SYSTEM: from flow meters to the
common gas outlet on machine.

7.  Receives gases from the high pressure E cylinders
attached to the back of the anesthesia
machine(1900 psig for o2,745 psig for N2O)
 Consists of,
-Hanger yoke(reserve gas cylinder holder)
-check valve(prevent reverse flow of gas)
-cylinder pressure indicator(gauge)
-pressure reducing device(regulator)

8.  Receives gases from the regulator or the hospital
pipeline at pressure of 40-55psig
 Consists of,
-Pipeline inlet connections
-Pipeline pressure indicators
-Piping
-Gas power outlet
-Master switch
-Oxygen pressure failure device
-oxygen flush and flow control valves

9.  Extends from the flow control valves to the
common gas outlet
 Consists of,
-flow meters
-hypoxia prevention safety devices
-unidirectional valve
-Pressure relief devices
-Common gas outlet
-Vaporizers and their mounting devices

11.  CRICLE SYSTEM : Verify adequate fresh C02
absorbent and its proper attachment to the
machine.
 Make all necessary connections of circle system
components .
 Either increased o2 flows or use o2 flush to
pressurize the breathing apparatus to greater
than 30cm H2O.
 Turn the o2 flow control valve off and stop 02
flush . Drop in air way pressure to less than
30cm H2O within seconds.

12.  Ventilators keep patient breathing during
sedation and help maintain good blood
composition.
 Modern ventilators have multiple settings to help
regulate the breathing patterns of different types
and ages of patient.
 BREATHING CIRCUITS:
This devices effectively breath for patients
as they send the mix of anesthetic gasses to the
lungs and exhale CO2 by product.

14.  The system expel the gases to the patient releases
from their lungs .
 In an active scavenging system, suction used to
remove the gasses from their patients lungs .
 In an passive system a tube sends gasses out to
the ventilation system for purification.

15.  Anesthesia ensures can be performed without
pain.
 During General Anesthesia ,where will be
unconscious , and local anesthesia where you
remain awake.
 Avoiding the potential risk of tracheal intubation.

16.  COMMON SIDE EFFECTS,
-Feeling sick
-damage to teeth
-damage to nerves
-asthma attack
-There is very low risk of more serious problems
such as,
-stroke
-heart attack and kidney damage

17. Thank U….