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Cert Prep > Valley: Equipment > Flashcards

Valley: Equipment Flashcards

1
Q

Wall gas hose to machine has a pressure of — to — psig for oxygen and nitrous oxide.

A

40-50

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2
Q

What is the function of the oxygen flow from wall supply check valve?

A

Prevents oxygen cylinder gas from escaping the anesthesia machine and going out the hospital wall. If this valve sticks open, there is no problem with hospital supplied gas but if it sticks open when on “E” cylinder gas, then “E” cylinder gas will exit out the machine via the DISS valve.

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3
Q

The — assembly has pins for E cylinders to fit on. The oxygen pin index is 2,5 and nitrous oxide is 3,5

A

Hanger yoke valve

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4
Q

The hanger yoke valve acts as ‘safety’ valve; — with pressure and — with pressure (free floating valve)

A

Opens ; closes

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5
Q

If the hanger yoke valve fails to open cylinder valve then the result is — gas flow to anesthesia machine.

A

No

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6
Q

What is the name of the gauge that shows oxygen tank pressure?

A

Bourdon

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7
Q

You have a dual hanger yoke with two oxygen “E” cylinders. Both cylinders are turned on; which one will suppply the gas machine?

A

The “E” cylinder with the highest pressure.

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8
Q

The Bourdon gauge shows a pressure of 825 psig; what does this mean?

A

There is 825 psig (pressure) from the oxygen “E” cylinder.

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9
Q

In a dual hanger yoke system, what prevents one cylinder from emptying into the other?

A

There is a free-floating valve for each cylinder and the oxygen “E” cylinder with the greatest pressure closes the free-floating valve on the cylinder with less pressure. This would hold true if one hanger yoke was empty with no cylinder.

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10
Q

Which oxygen cylinder pressure regulator?
Cylinder pressure decreased to 40-50 psig (intermediate pressure)

A

First stage regulator

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11
Q

Which oxygen cylinder pressure regulator?
-Reduces pressure of 40 50 psig to 16 psig (intermediate to low pressure)
-Receives wall pressure oxygen or oxygen from first stage regulator
-Diaphragm valves only reduce pressure

A

Second stage regulator

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12
Q

Oxygen flush valve (anesthetist’s panic button)
-Oxygen delivered direcly to patient at a rate of
— to — L/minute
-Pressurized at — to — psig from wall or cylinder
-Dilutes anesthetic gas - intermediate pressure
-Ball-and-spring valve - you supply the energy
-May cause barotrauma

A

35-75 L/minute ; 40-50 psig

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13
Q

Pressure sensor shut-off valve or oxygen failure pressure device
-senses oxygen pressure at — psig
-shut off — if oxygen pressure falls
-oxygen pressure must maintain at least — psig to keep valve open
-ball-and-spring type valve
-senses — only not flow delivery

A

50 ; nitrous oxide ; 25 ; pressure

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14
Q

Oxygen flow meter and flow control valve
-deliver gas to —
-receives low pressure (— psig)
-needle valve
-the — tube is gas specific and tapered with largest diameter at the top

A

Patient circuit ; 16 ; Thorpe

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15
Q

With vaporizer on, this valve is pushed — by the pressure in the line. Should a back-pressure develop that is greater than vaporizer flow pressure, the valve will — and stop the vaporizer flow.

A

open ; close

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16
Q

Check valve between vaporizer outlet and machine outlet (not present on all machines)
-Prevents — of flow to vaporizer (back pressure)
- —floating type valve (stiffer)

A

reversal ; Free

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17
Q

What happens if the inspiratory valve sticks open?

A

The expiratory volume will exhaust through the inspiratory limb. The ETc02 waveform will become elevated.

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18
Q

What happens if the expiratory valve sticks open?

A

Due to the path of least resistance, the inspired volume will not enter the endotracheal tube but instead will bypass and exhaust through the expiratory limb.

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19
Q

APL valve (pop off)
-Adjusts the limit of — in the patient circuit and rebreathing bag
-Tightening the knob will — the pressure
-Attached to the — check valve

A

pressure ; increase ; exhalation

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20
Q

Waste gas scavenging system:
-Receives gas from the — and —
-—pressure relief valve will allow gas to escape from the system to the operating room if pressure
builds up in the system
-Wall evacuation system requires the — valve to be properly adjusted. If excess flow is present, then the negative pressure relief valve will open and if flow is not enough the positive pressure relief valve opens and waste gas enters the operating room

A

machine (APL) and ventilator ; Positive ; needle

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21
Q

Adjusting the needle valve alters the flow of waste gases into the vacuum source; adjusting the needle
valve does — regulate vacuum or suction.

A

not

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22
Q

What will happen when the vaporizer is tipped then leveled?

A

Liquid vapor will get into the vaporizer chamber and the carrier flow will carry more agent to the patient.

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23
Q

What does this mean that vaporizer will carry more agent after it is tipped then leveled?

A

More agent picked up means a higher concentration of agent delivered to the patient. It may be a lethal dose.

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24
Q

What do I do if the vaporizer has been tipped then leveled?

A

Do NOT use the vaporizer; send it back to the company for recalibration.

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25
Q

The — pressure (cylinder pressure) side includes the cylinder pressure gauge (Bourdon), the check valves in the hanger yoke, and the index pins on the hanger yoke.

A

high

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26
Q

High pressure is — pressure.

A

cylinder

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27
Q

The — pressure portion of the machine includes the flush valve, second stage regulator, oxygen pressure shut-off valve, pressure gauges from pipeline, and diameter index safety system and flow control valve of manifold.

A

intermediate

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28
Q

The intermediate pressure portion can be hospital piped-in gas (— psi) or cylinder gas — the first stage regulator.

A

55 ; after

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29
Q

The — pressure portion of the machine includes the vaporizer(s), common gas outlet, manifold, and check valves.

A

Iow

30
Q

Low pressure is — psi and is the pressure after the — stage regulator.

A

16 ; second

31
Q

4 main different pressure components of anesthesia machine:

A
  1. Cylinder pressure
  2. First stage regulator (55 psi)
    3a. Hospital walls pressure (45-55 psi)
    3b. Second stage regulator (16 psi)
  3. Gas flow manifold
32
Q

What are the three primary valves in the gas machine?

A
  1. “Free floating” valve
  2. Ball and spring valve
  3. Diaphragm valve
33
Q

This valve moves in the direction it is being pushed by gas now.

A

Free floating valve

34
Q

The free floating valve can be found in what 2 systems?

A

D.I.S.S. and dual hangar yoke systems

35
Q

The primary function of any free floating valve is to — gases from leaking out of the system. A — system from the cylinders will push these valves closed to prevent gases from escaping or leaking out of the system.

A

prevent ; pressurized

36
Q

This valves function is to permit gas flow after you have made a connection such as plugging the gas lines into the wall. You supply the energy to make this valve function properly. If the connection is not complete, the gas flow will not occur. The “all-or-none” valve because it is either hooked up correctly with the gas flow or is not. There is no in between. The oxygen flush valve is an “all-or-none” valve because you supply the energy to make it work. When you take your thumb off, gas flow stops.

A

Ball and spring valve

37
Q

What valve has two of these valves in the machine, the first and second stage regulators. Remember these valves reduce pressure, and that is all they do.

A

Diaphragm valve

38
Q

The first stage regulator takes cylinder pressure and reduces it to — psig, which is the same as the hospital wall pressure. Remember there are only two valves that reduce pressure. The second stage regulator reduces hospital pressure to — psig.

A

55 ; 16

39
Q

You are an oxygen molecule in an oxygen “E” cylinder. Identify the 12 paths to the intubated patient using arrows. On your travel, identify how you are moving, any valves you pass through and pressure changes you encounte.

A
  1. Oxygen E cylinder
  2. Open cylinder valve
  3. Hanger yoke system
  4. Opens free floating valve of this E cylinder AND simultaneously closes the free-floating valve of the other hanger yoke system AND activates the Bourdon Gauge to read cylinder pressure.
  5. First stage regulator (diaphragm valve) reducing cylinder pressure to intermediate pressure (45-55psig), and now SIMULTANEOUSLY to:
    -oxygen pressure sensor valve
    -flush valve
    -DISS (closes free floating valve and PREVENTS CYLINDER OXYGEN FROM ESCAPING THE GAS MACHINE)
    -second stage regulator (converts intermediate pressure to low pressure or 16psig)
  6. Gas flow manifold (flow meters)
  7. Vaporizer
  8. Common gas outlet
  9. Down through the soda lime canister
  10. Inspiratory valve
  11. Inspiratory limb of the breathing circuit
  12. Endotracheal tube
40
Q

The function of this valve is to change pressure:
a. Cylinder valve
b. First stage regulator
c. Fail safe valve
d. Flow meter

A

b. First stage regulator

41
Q

This valve regulates the flow of N20 via oxygen pressure:
a. Cylinder valve
b. First stage regulator
c. Fail safe valve
d. Flow meter

A

c. Fail safe valve

42
Q

This is a “free floating” valve:
a. Cylinder valve
b. First stage regulator
c. Fail safe valve
d. Flow meter

A

a. Cylinder valve

43
Q

This valve has a special “diaphragm” which identifies the function:
a. Cylinder valve
b. First stage regulator
c. Fail safe valve
d. Flow meter

A

b. First stage regulator

44
Q

The waste gas scavenging system has an adjustment knob and when you turn the knob you regulate:
a. Vacuum
b. Suction
c. Flow
d. Pressure

A

c. Flow

45
Q

If this gas scavenging knob was not adjusted properly and there was not enough gas evacuating, what would happen?
a. The negative pressure valve would open
b. The positive pressure valve would open
c. Low pressure alarm would sound
d. The reservoir bag would empty

A

b. The positive pressure valve would open

46
Q

Gas flowing through the oxygen flush valve is:
a. Used to deepen the anesthetic level
b. At a rate of 3 L/min
c. Intermediate pressure
d. Regulated by a free-floating valve

A

c. Intermediate pressure

47
Q

Your flow meter float is read at the __ and if broken it will ___
a. Bottom; fall
b. Top; go up
c. Bottom; go up
d. Top; fall

A

d. Top; fall

48
Q

If a vaporizer accidentally gets knocked over and then used, would the concentration to the patient
read differently than dialed?
a. The patient only receives what is dialed
b. The patient concentration would be greater
c. The patient concentration would be less
d. None of the above

A

b. The patient concentration would be greater

49
Q

The low pressure alarm on your gas machine is sounding. What happened?
a. patient is biting the tube
b. Patient’s respiratory rate is > 25/min
c. Disconnection has occurred in the circle
d. Pressure has increased in the circle

A

c. Disconnection has occurred in the circle

50
Q

Defined by the Department of Transportation “as any material or mixture having in the container either an absolute pressure 40 lb/in^2 at 130 degreeF, or both; or any liquid flammable material having a vapor pressure exceeding 40 lb/in^2 at 100 degreeF

A

Compressed Gas

51
Q

Cylinders are constructed entirely of — that meets certain chemical and physical requirements.

A

steel

52
Q

The cylinder walls are — of an inch thick.

A

3/8

53
Q

Some cylinders are constructed of — alloy.

A

chrome molybdenum

54
Q

The given pressure in a tank is called the — pressure.

A

service

55
Q

Each cylinder must have some tensile strength but must not exceed —%.

A

10

56
Q

Each cylinder must be subject to a test by interior hydrostatic pressure at least once every — years.

A

five

57
Q

The medical — industry generally expressed the contents of full cylinders in terms of gallons measured at 70 degreeF and normal atmospheric pressure, and — gases in cylinders are expressed in terms of weight.

A

gas ; liquified

58
Q

established requirements for the design, construction, testing, marking, labeling, filling, storage, handling, maintenance, and transportation of compressed gas cylinders.

A

Department of Transportation (DOT)

59
Q

sets standards of safe practice. Has no legal force but compliance is basis for accreditation by JCAHO.

A

Compressed Gas Association (CGA)

60
Q

same as for CGA - contains recommendations for the location, construction, and installation of bulk oxygen systems (NFPA 50)

A

National Fire Prevention Association (NFPA)

61
Q

sets basic performance and safety requirements for components of anesthesia machines, endotracheal tubes and connections, pressure and vacuum, and gas pressure regulators.

A

American National Standards Institute (ANSI)

62
Q

standards to protect the health and safety of workers.

A

National Institute of Occupational Safety and Health (NIOSH) and Occupational Safety and Health Act of
1970 (OSHA)

63
Q

promulgates standards for medical devices and gases.

A

Food and Drug Administration (FDA)

64
Q

assesses technology and revises standards.

A

American Society for Testing Materials (ASTM)

65
Q

voluntary accrediting agency.

A

Joint Commission on Accreditation of Hospitals (The JC)

66
Q

develops purity specifications for medical gases.

A

Pharmacopeia of the United States & National Formulary

67
Q

The following 7 cylinder markings are required:
1. — body (DOT). Type and material of the cylinder
2. — number
3. Purchaser, —, and manufacturer
4. Manufacturer’s —
5. Manufacturer’s — symbol
6. — date, retester, I.D. symbol, 110% filling, ten year test interval
7. — ring owners identification

A

Regulatory ; Serial ; user ; manual ; identifying ; Retest ; Neck

68
Q

— is a gas in the cylinder because it has a critical temperature below room temperature.

A

Oxygen

69
Q

— at room temperature is a liquid because it has a critical temperature above room temperature

A

Nitrous oxide

70
Q

The cylinder should be open slightly for a moment to clear the outlet of possible dust. This is called?

A

cracking the cylinder

71
Q

The adiabatic heat of compression can generate heat and cause —.

A

ignition

72
Q

The compression of cylinder content into a small space generates the heat that may cause —.

A

combustion

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