about medical gas supply system

2. The centralized medical gas supply
system is an ancillary service to a
hospital…
Ancillary means one which
supports the main work.

3. What is medical gas??
Any gas or mixture of gases
intended to be administrated to
patients for therapeutic, diagnostic
or for surgical tool application.

4. Commonly used medical gas are…
• Oxygen (O2)
• Compressed medical grade air
• Carbon Dioxide (CO2)
• Nitrous Oxide (N2O)
• Nitrogen (N2)
• Carbon Monoxide (CO)
• Ethylene Oxide (EtO)

5. Oxygen
• Colorless, odorless,
tasteless
• Slightly heavier
than air.
• Nonflammable but
supports combustion
Compressed Air
• Is the same mixture
of nitrogen, oxygen,
carbon dioxide and
all other gas.
• Is piped in to all
modern hospitals
• Used to power
pneumatically
powered equipment.
Carbon Dioxide
• Colorless and
Odorless
• Does not support
combustion-Used in
fire extinguishers
• More soluble in
liquids than oxygen
• Easier transporting
in blood then
oxygen
• Used to inflate
tissues.

6. Nitrous Oxide
• Nonflammable
but supports
combustion
• Used in
anesthesia
Nitrogen
• Used to power
pneumatic
equipments
• Used as lab
gas (liquid) for
freezing tissue.
Vacuum
• The word
means a space
with out any
matter.
• Very much
used in
hospitals for
suction and
aspiration.

7. Medical gas supply includes
• Cylinders
• A piped gas system

8. Cylinder body
• Made of thin-walled molybdenum
steel to withstand high pressures.
• Lightweight O2 cylinders can be
made from aluminum alloy used
during transport.
• Are made in different sizes (A to E).
• Are colour-coded.

9. What does the cylinder contain?
• Nonliquified compressed gas: It dosent
liquify @ ordinary temp & pressures
<2500psig
E.g. O2,N2, air, Hélium
• Liquified compressed gas becomes liquid in
ordinary temp & pressures from 25-
2500psig
E.g. Nitrous oxide,CO2

10. Cylinder Sizes

11. Standard Colors
GAS INTERNATIONAL
oxygen White
Carbon dioxide Gray
Nitrous oxide Blue
helium Brown
Nitrogen Black
air White & black
vaccum yellow

12. Pin index system
O2
2,5
N2O
3,5
CO2
1,6
•Pin index system to make it almost
impossible to connect a cylinder to the
wrong yoke

14. Valves
• filled and discharged through a valve
• attached to the neck,
• made of bronze or brass.

15. Types

16. Tail pipe
• Copper pipes are used.
• Connected with cylinder to manifold
system through tail pipe/pig pipe.
Non Return valve
• A non-return valve allows a medium
to flow in only one direction
• Made up of brass

17. Manifold

18. For o2
• 16 cylinders are used in either side of the
manifold.
• One side is working at a time.
• 2 emergency cylinders
For N2O
• 6 cylinders on 2 sides.
• 2 emergency cylinders
cylinder pressure- 130 kg/cm²
line presssure- 4.2 kg/cm²

20. Storage of cylinders
• Stored under cover, preferably a cool
dry place.
• Should not be stored near any
combustible materials.
• Emergency services should be advised
of the location.
• Precautions should be taken to protect
cylinder from theft.
• Medical cylinders should be stored
separately from industrial and non
medical cylinders.

21. Safe use of cylinders
• Cylinders should be handled only by
trained person
• Cylinder valves, regulator, Gauges, and
fitting should never come into contact
of oils , greases , organic lubricants etc
• Cylinders should not be subjected to
extreme of temperatures
• Connection to piping , regulator, and
other equipments should always be
kept tight to prevent leakage.

22. • No part of the cylinders should be
painted or modified by users
• A cylinder should never come into
contact of electricity
• Before use ,cylinder should be
identified by the label. The color of
the cylinder should not be relied
upon for identification
• A pressure regulator should always
be used.

23. Piped Gas Supply
• A network of copper alloy pipelines from
central supply points.
• The outlets are colour- and shape-coded
to accept matching probes.
• Alarm panels.
Wall mounted outlet socket

24. Problems in piping
• Inadequate pressure
• Leaks
• Alarm problems like,
 Failure, absence or disconnection
 False alarm
• Cross connection of différent gas.

25. • Different types of outlet sockets like,
 SS type
 DIN type
• Bed head panel incorporates
 Nurse Call Unit.
 Medical gas outlets
 Electrical Sockets/ Switches
 Reading Lamp
 Room Lighting.
 Audio Unit

26. Hazards
• Incorrect cylinders
• Incorrect content
• Incorrect valve
• Damaged Valve
• Suffocation
• Fire
• Explosion
• Contamination of cylinder content
• Theft of cylinder parts

27. Take home message…