Medical Gas Systems Flashcards by Hailey Haas

Sources of gas

Where you use NO2 cylinder

Piped in or cylinders (E size)

Cath lab or missions trip

How well did you know this?

Not at all

Perfectly

Cylinder always serves as what

Back up

How well did you know this?

Not at all

Perfectly

Oxygen located ____ to patient on mannifold

What role this serves

Closest

In case there is a leak of the other 2 gases

How well did you know this?

Not at all

Perfectly

What lets us know there isn’t enough oxygen

What doesnt do this

Oxygen analyzer

Fail safe- senses pressure

How well did you know this?

Not at all

Perfectly

Colors stand for which gas

Blue 
Yellow 
Black 
Brown 
Green

Nitrous oxide
Air 
Nitrogen 
Helium 
Oxygen

How well did you know this?

Not at all

Perfectly

E size oxygen cylinders considered full at __-__ psi and __-__ L. As its used the pressure falls ___ ___ to the amount left in the tank

625-700
2000-2200
In proportion

How well did you know this?

Not at all

Perfectly

Air cylinders considered full at __-__ psi with ___ L. Pressure in tank falls __ __ to amount left in tank

1900-2000
625
In proportion

How well did you know this?

Not at all

Perfectly

A full cylinder of N20 has pressure of __ psi and ___L. Stored as a ___. Pressure ___ __ indicate amount left in tank. How you determine this

745
1590
Liquid 
Does not 
Weighing the cylinder

How well did you know this?

Not at all

Perfectly

Pressure on n2o tank doesnt change until what

Almost empty and there is vapor

How well did you know this?

Not at all

Perfectly

Full tank 2200 psi 650L
Current 750 psi, ?L

How many L left, running at 2LPM flow, how many minutes left

110 x 220/2

How well did you know this?

Not at all

Perfectly

Purity of medical gases specified in US ___ and enforced by who

Pharmacopoeia

FDA

How well did you know this?

Not at all

Perfectly

___ __ ___ est req for manufacturing, qualification, transportation, storage, handling, maintenance, and disposition of medical cylinders and containers

Dept of transportation

How well did you know this?

Not at all

Perfectly

DOT requires what on each cylinder

Permanent marking on shoulder

How well did you know this?

Not at all

Perfectly

Each cylinder must have a ___ on side but cant do what

Label (indicates flammability), cant cover permanent marking

How well did you know this?

Not at all

Perfectly

Cylinder ___ indicate full, in use, or empty

Tags

How well did you know this?

Not at all

Perfectly

What is safety system for medical gas pipeline as and what it does

Diameter index safety system

Non interchangeable connections on medical gas lines. Consists of body, nipple, and nut.

How well did you know this?

Not at all

Perfectly

Never leave cylinder ___ without ___

Never leave ___ cylinders on machine

Never leave __ __ on port when installing cylinder

Upright, support

Empty

Plastic tape

How well did you know this?

Not at all

Perfectly

Never rely on cylinder ___ for identification

Never ___ valves

Color

Oil

How well did you know this?

Not at all

Perfectly

Before fitting applied to cylinder, particles should be cleared from ___ slowly by __ valve ___ from personnel

Valve should always be __ __ when a cylinder is in use. __ __ may not deliver enough gas

Outlet, cracking, away

Fully open, marginal open

Vaporization definition

Why important

Conversion of liquid to gas

Inhalation agents we use are liquids converted to vapor to be inhaled

Vaporization dependent on what

Vapor pressure, temperature, amount of carrier gas used

Molecules of a volatile agent in a closed container are distributed between what

What creates vapor pressure

Liquid and gas phases

Gas molecules bombarding surface of liquid and walls of container

Vapor Ps at 20 c

Enflurane

172 mmHg

Vapor p isoflurane

240 mmhg

Vapor p halothane

244 mmhg

Vapor p sevoflurane

160 mmhg

Vapor p desflurane

669 mmhg

What is latent heat of vaporization Energy for vaporization comes from what

calories req to change 1 gram of liquid into vapor without a T change Liquid itself or an outside source

Specific heat is what What substance can be

calories needed to inc T of 1 gram of substance by 1 C Liquid, solid, gas

What is thermal conductivity What a higher value of this means

Speed with which heat flows through a substance Conducts heat better

Altitude | How changes affect pressure

Increase altitude decrease barometric pressure Decrease altitude increase barometric pressure

Boiling point occurs when Relationship between temperature and vaporization

Vapor pressure = barometric pressure Direct relationship, both increase or both decrease

Vaporizers ___ specific ___ compensated ___ __

Agent Temperature Variable bypass

Variable bypass vaporizer | How it works

Part of gas flow passes into vaporizing chamber where its saturated with vapor The vapor laden part rejoins gas flow for delivery and dilution

When you need to calibrate vaporizer

When going to different atmospheric pressure, will give too much if going to lower atmospheric pressure

% vapor delivered to pt is relative to __ __ in comparison to the __ __

Vapor pressure | Barometric pressure

Vaporizer output isoflurane and how to calc

33% | Vapor pressure / atmospheric pressure

Need a different vaporizer for which gas and why What vaporizer does

Desflurane Close to atmospheric pressure and boiling point. Heater, false atm of 2 in unit. Create higher p with heat

Variable bypass. What you are doing at higher altitude How to calc

Same partial pressure X1= x (p/p1)

Tec 6 | How to calc req dial setting

Normal dial % x 760 | /ambient pressure mmHg

Tec 6 Have to deliver what at higher altitude and lower Barometric pressure Conversely you do what in lower altitude to prevent what

Higher dialed concentration Decrease output, prevent OD

Copper kettle ___ flow, ___ through Dedicated __ for the kettle to __ __

Measured, bubble | Flowmeter, measure flow

Copper kettle Gas comes through central tube inside vaporizer to the __ __ Flow of gas then direct down toward __ __ __

Loving cup | Liquid, bubble through

How to calc vapor output

CG (carrier gas) x VP | / BP (barometric) - VP

How to calc anesthetic conc

Vapor output in ml/min | / total gas flow ml/min

Never fill vaporizer when

In the machine

Potential vaporizer hazards

Wrong agent in vaporizer, contamination, tipping, overfilling, simultaneous admin of more than 1 vapor, leaks, pumping effect