Gas Supply and Distribution Flashcards
PSI
Pounds per Square Inch
PSIg
Pounds per square inch guage
The difference between measured pressure and surrounding atmospheric pressure
Read 0 at atmospheric pressure
PISa
Pounds per square inch absolute
PSIg + local atmospheric pressure
Regulatory agency that enforce medical gas purity
FDA
DOT regulations
Regulate how gas cylinders are manufactured, labeled, filled, transported, stored & disposed of.
Gases Used in Anesthesia
Oxygen, Air, nitrous oxide, helium, nitrogren, nitric oxide, carbon dioxide
Gases provided only in cylinders
Helium, heliox, nitric oxide, carbon dioxide
Pin Index Safety System
Keeps cylinders matched with correct inlet
Oxygen PISS
2,5
Air PISS
1,5
N2O PISS
3,5
Directions on how to install E-Cylinder
- Place cylinder gasket over yoke inlet
- Align pins and cylinder valve
- Push cylinder forward into yoke
- Rotate yoke arm up and over to close
- Turn T-handle clockwise until it’s tight and holds cylinder in place
- Use cylinder wrench to open or close cylinder valve.
Cylinder Primary Regulator
Takes the pressure from cylinders and decreases it to 45 Psi
Empty Weight and Dimensions of E Cylinder
14kg, 4.5 x 26
Air
625L, 1800 psi, US-yellow, Intl-WBl, gas
Oxygen
660L, 2000psi, US-green, Intl-White, gas
Nitrous Oxide
1590L, 750psi, US-blue, Intl-Blue, gas/liquid
CO2
1590L, 838psi, US-gray, Intl-gray, gas/liquid
Helium
500L, 1600psi, Us-brown, Intl-brown, gas
Heliox
500L, +, US-BrG, Intl-BrW, Gas
N2
610L, 1900psi, US-Bl, Intl-Bl, gas
How many liters of Oxygen does an H cylinder hold
6900L
E cylinder Use Equation
(.33) * guage pressure/ O2 consumption
N20 cylinder use
M1V1=M2V2 where M2= 44g and V2=22.4L
Pipeline
Primary source of gas, 50PSIg
Pipeline supply source for Oxygen
Liquid oxygen tank with vaporizer and pressure-reducing valve
Pipeline supply source for N20
H-cylinders in basement
Pipeline Safety System
Diameter Index Safety System
Color and diameter coordinated, standardized diameter to avoid hypoxic gas delivery
Master Alarm System
- Monitors central supply and distribution system for all gases
- Signal changes in pressure, supply changeover, and depletion of supply
Area (local) Alarm System
- Monitors a specific area
- Signals pressure changes 20% above/below normal operating pressure