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Review
. 2013 Sep;57(5):500-6.
doi: 10.4103/0019-5049.120147.

Anaesthesia gas supply: gas cylinders

Uma Srivastava  1
Affiliations
Review

Anaesthesia gas supply: gas cylinders

Uma Srivastava. Indian J Anaesth. 2013 Sep.

Abstract

Invention of oxygen cylinder was one of the most important developments in the field of medical practice. Oxygen and other gases were compressed and stored at high pressure in seamless containers constructed from hand-forged steel in1880. Materials technology has continued to evolve and now medical gas cylinders are generally made of steel alloys or aluminum. The filling pressure as well as capacity has increased considerably while at the same time the weight of cylinders has reduced. Today oxygen cylinder of equivalent size holds a third more oxygen but weighs about 20 kg less. The cylinders are of varying sizes and are color coded. They are tested at regular intervals by the manufacturer using hydraulic, impact, and tensile tests. The top end of the cylinder is fitted with a valve with a variety of number and markings stamped on it. Common valve types include: Pin index valve, bull nose, hand wheel and integral valve. The type of valve varies with cylinder size. Small cylinders have a pin index valve while large have a bull nose type. Safety features in the cylinder are: Color coding, pin index, pressure relief device, Bodok seal, and label attached etc., Safety rules and guidelines must be followed during storage, installation and use of cylinders to ensure safety of patients, hospital personnel and the environment.

Keywords: Cylinders; installation of cylinders; medical and anaesthetic gases; pin index safety system; safety devices; testing; valves.

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Conflict of interest statement

Conflict of Interest: None declared

Figures

Figure 1
Figure 1
Medical-oxygen-cylinder with protective cap
Figure 2
Figure 2
Cylinder valve
Figure 3
Figure 3
Pin index of oxygen cylinder
Figure 4
Figure 4
Bodok seal
Figure 5
Figure 5
Bullnose and handwheel valve
Figure 6
Figure 6
Integral valve
Figure 7
Figure 7
Oxygen cylinder label
Figure 8
Figure 8
Entonox with delivery system
Figure 9
Figure 9
Heliox
See this image and copyright information in PMC

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