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Module 6 Flashcards

(49 cards)

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1
Q

No worker should be exposed to halogenated concentrations greater than

A

2ppm; 0.5ppm with nitrous oxide & no more than 25ppm of nitrous oxide based on a time weighted 8 hour average

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2
Q

Is there a universal standard for waste gas exposure?

A

No

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3
Q

What happens when there is no attempt to scavenge gases like nitrous?

A

Is found at 400-600ppm & there is 5-10ppm of halogenated agents

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4
Q

How are standards of scavenged gases met?

A

Providing a leakage of 2.5L every 5 min of nitrous

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5
Q

What are the 5 sources of gas contamination?

A

APL Valve

Anesthesia Machine

Ventilator

Exhaled Gases

Anesthetic Technique

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6
Q

In a non rebreathing system, large volumes of anesthetic gases are discharged through what?

A

The relief valve

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7
Q

In a high pressure system (anesthesia machine), what is the range of nitrous oxide?

A

26-750 PSI

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8
Q

Leaks are common from

A

Defective connectors or tank yolks

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9
Q

Quick connectors are easily

A

Brokendown & leak easier

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10
Q

This gas leaks due to normal wear & tear and due to absorbent granules impeding the seal

A

Carbon Dioxide

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11
Q

The higher the pressure in the breathing circuit, the

A

More gas can escape through a leak

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12
Q

Where is an area where exhaled anesthetics can accumulate?

A

PACU; concentrations as high has 10ppm

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13
Q

What is a list of things that can cause a leak?

A

Anesthesia Technique

Turing on Vaporizer & Flow Meters

Preparing the patient

Poorly fitted face mask/LMA

Disconnection

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14
Q

The sampling line of the anesthesia circuit draws in

A

1-300mL of gas/min

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15
Q

How many exchanges are recommended per hour in the OR?

A

15/hour

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16
Q

How is the air removed in the OR?

A

Recirculating ventilation filters & recirculates, which can affect the distribution of airborne particles, creating turbulence

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17
Q

What are the 4 properties of the scavenging systems?

A
  1. Relief Valves
  2. Conducting Tubing
  3. Scavenging Interface
  4. Disposal Linee
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18
Q

What are the 2 types of scavenging systems?

A

Active & Passive

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19
Q

What is the flow of gas ini passive systems?

A

Flows under their own pressure

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20
Q

What is the flow of gas ini active systems?

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A

Negative pressure is applied & gas is sucked away

21
Q

Joint commission requires all waste gases to be

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A

Actively scavenged

22
Q

When the ventilator is off, how does scavenging gases leave?

Study These Flashcards
A

Via APL valve

23
Q

When the ventilator is on, how does scavenging gases leave?

Study These Flashcards
A

Via ventilator pressure relief valve

24
Q

The exhaust port is how big?

25
In the interface system, where are the relief valves located?
Between the breathing circuit & the hospital vacuum to protect the patient from negative pressure caused by suction or from positive pressure
26
Interface systems can either be
Closed or Open reservoir
27
What happens when vacuum system is insufficient?
Build up within the reservoir causing the positive pressure relief valve to open, ventilating waste gas into the room
28
Valves are set to open at what cm of water
10
29
What acts as a visual indicator of the scavenging system function?
Reservoir bag
30
What happens if the hospital generates too much negative pressure
The pop off or sub-atmospheric relief valve will open & allow air to be drawn into the reservoir
31
Open reservoir scavenging. system is _________& uses relief ports that are open to the atmosphere
valveless, avoiding positive & negative
32
Where is the gas sampling port
Typically comes from the Y port
33
Name 2 places waste gas should go
Conducted to waste gas scavenging Returned gas to breathing system for scavenging
34
When should scavenging system be checked?
With abnormal pressures
35
What happens with inadequate ventilation
Oxygen can build up & when combined with heat & fuel could cause a fire
36
Reasons for scavenging mishaps
User error Incorrect connection Negative pressure relief valve can fail t open Exhaust port can be occluded
37
Does the ASA demand routine monitoring when regular maintenance/daily checks
No
38
What are the recommendations for waste gas
1. Scavenging 2.Appropriate work practices 3. Education
39
What variables determine the reduction in waste anesthetic gases in the OR?
1. Room ventilation 2. Anesthesia equipment conditions 3. Scavenging effectiveness 4. User techniques
40
The scavenging interface can be either
Open or Closed
41
What is the most important component of the scavenger system?
The interface between the breathing circuit & wall suction
42
Closed interface depends on the
Bag
43
When is closed interface useful?
When passive scavenging is used (active required in the US)
44
What is required when using a closed interface system?
Must be a way to relieve positive or negative pressure, which is the relief valve ( will be released into the OR)
45
What should be adjusted in the closed system so the scavenging reservoir bag is neither flat nor over distended
Suction
46
Since relief valves can fail, what is supplied on all new workstations?
An open scavenging interface
47
The open interface is opened to
The atmosphere
48
Why is suction important ini open system?
If it is inadequate, all waste gases will be released into the OR
49
What is the threshold for smelling volatile agents
5-300ppm

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