GAS BOTTLES Prepare and monitor anaesthesia in animals GAS BOTTLES

Gases Used Commonly –O 2 –N 2 O Less commonly –CO 2 –Medical Air

GAS BOTTLES How full is the bottle? N 2 O gauge is deceptive (since pressure constant until fully empty)

GAS BOTTLES Bottle Hazards Falling of unsecured cylinders may lead to: –Direct injury of personnel. –Explosive decompression if the valve breaks off, which will turn the cylinder into a lethal projectile –These hazards mandate that all cylinders be secured to a wall or placed on special carts. Fires and explosions may be caused by the oxidizing ability of oxygen and nitrous oxide: no grease must used in the threads of the valves or connectors. Incorrect identification of the contents of cylinders is a potential hazard.

GAS BOTTLES

Bottle Contents by Colour O2O2 AirN2ON2OCO 2 white black & white bluegrey

GAS BOTTLES

N2ON2O

Preventing wrong connections For small cylinders –Special pin placements on connecting yoke For large cylinders –Differing screw diameters

GAS BOTTLES Regulators Bottle pressure Output pressure

GAS BOTTLES Regulators – 2 functions 1.Maintain constant pressure in outflow line (i.e. regulate pressure) 2.Show pressure in tank (+/- outflow line) –+/- show pressure in line (models with a second gauge)

GAS BOTTLES Regulator Converts high cylinder (up to 2000 psi) pressure to a safer hose pressure (50-55 psi) –Keeps a steady flow as pressure in bottle drops

GAS BOTTLES Connecting to Cylinders Attach regulator

GAS BOTTLES FYI – Some Conversions 50 psi = 345 kPa 2,000 psi = 13,790 kPa (1 psi = kPa)

GAS BOTTLES Connecting to Cylinders

GAS BOTTLES Connecting to Cylinders 1.Tightened by hand 2. Then tap opened

GAS BOTTLES Opening tap Never open tap / hosewheel unless regulator is connected Either –2 full turns, or –Fully open, then turn back ½ rotation

GAS BOTTLES When connecting O 2 cylinder… No naked flames (no smoking) No grease/oil on connections

GAS BOTTLES When bottle empty… Leave some oxygen in bottle –Reduces moisture entering

GAS BOTTLES Moving cylinder Use trolley for moving larger sizes Ensure always well-secured when transporting by vehicle

GAS BOTTLES The End