Equipment and Monitoring Flashcards

1
Q

How long does the backup battery on AM’s last?

A

30 minutes

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2
Q

What pressure is hospital pipeline?

A

50 psi (344 kPa)

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3
Q

What makes up the pipeline connection at the back of the AM?

A

DISS, pipeline inlet, filter, check valve, pressure gauge

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4
Q

What are the events that occur if the pipeline pressure fails?

A

oxygen low pressure alarm sounds, fail-safe valve halts delivery of all gases except O2

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5
Q

What steps are taken if complete loss of O2 pipeline pressure occurs?

A

Open the O2 cylinder, disconnect the pipeline, switch to low FGF, manually ventilate to conserve O2.

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6
Q

Why is it so important to disconnect the pipeline in the event of cross-connection of gases or pipeline pressure issues?

A

Cylinder pressure is 45 psi, Pipeline is 50 psi. The AM will preferentially draw gas from the higher pressure source.

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7
Q

What are the only instances backup cylinders should be open? (2)

A

when they are being checked, when the pipeline fails

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8
Q

What is the E-cylinder color, PSI, capacity, and PISS position for Air?

A

yellow, 1900, 625L, 1-5

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9
Q

What is the E-cylinder color, PSI, capacity, and PISS position for O2?

A

green, 1900, 660L 2-5

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10
Q

What is the E-cylinder color, PSI, capacity, and PISS position for NO2?

A

yellow, 745psi, 1590L, 3-5

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11
Q

What is the most fragile part of a E-cylinder?

A

cylinder valve

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12
Q

What are the 3 safety relief devices on the E-cylinders?

A

frangible disk bursts under pressure, valve that opens at high pressure, fusible plug that melts

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13
Q

What are the three functions of a hanger yolk?

A

orients cylinders, gas tight seal, ensures unidirectional flow

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14
Q

What is transfilling of E-cylinders and how is it prevented?

A

2 tanks of the same gas with different pressures. The higher psi tank will empty into the lower psi tank instead of proceeding towards the flowmeters. Prevented with a unidirectional valve.

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15
Q

Who sets purity standards for medical gases?

A

USP and FDA

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16
Q

What gases pass through a fail safe valve before proceeding to their flowmeters?

A

All but O2

17
Q

Which direction do flowmeters turn to increase the gas flow?

A

counterclockwise

18
Q

What is the best alternative to the flush valve to rapidly fill the bellows?

A

increase FGF to 8-10L

19
Q

Describe the relationship of temperature and rate of vaporization?

A

direct. Increased temp, increased vaporization

20
Q

What three factors determine rate of vaporization?

A

temperature, vapor pressure of liquid, partial pressure of the vapor above the liquid

21
Q

What components of a vaporizer ensure carrier gas fully saturated with anesthetic vapor?

A

wicks and baffles

22
Q

What is a Tec 6 vaporizer heated and pressurized to?

A

39 degrees, and 2 atmospheres (520mmHg)

23
Q

Vaporizers should be drained and fresh gas ran through them if they are tipped to what degree?

A

45 degrees

24
Q

Explain the four breathing circuits?

A

Open- no reservoir, no rebreathing
semi-open- reservoir, no rebreathing. Circle with FGF > ME
semi-closed- reservoir, partial rebreathing. Circle with FGF < ME
closed- reservoir, complete rebreathing. Circle with APL closed and low flows

25
Q

How much FGF is required to prevent rebreathing in nonrebreathing circuits?

A

2-3x ME, typically 5L/min

26
Q

What is the major disadvantage of the Bain circuit?

A

if the inner FGF tubing becomes kinked, the entire circuit becomes dead space.

27
Q

What is the minimum weight of a child for a pediatric circle system?

A

10-20kg

28
Q

What are the only two common reasons for an increase in inspired CO2?

A

exhausted CO2 absorbent, faulty unidirectional valves

29
Q

If inspired CO2 reaches more than 1-3 mmHg what should FGF be increased to?

A

5-8L/min

30
Q

In what two patient populations is low flow anesthesia absolutely contraindicated?

A

smoke inhalation injury and MH

31
Q

Which CO2 absorbent activator (NaOH, KOH) is implicated with producing more carbon monoxide, and Compound A?

A

KOH

32
Q

At what pH does ethyl violet change from colorless to blue-purple?

A

10.3

33
Q

Which volatiles are degraded the most and least by soda lime?

A

Sevo the most, Desflurane the least

34
Q

What is capnometry?

A

all means of measuring CO2

35
Q

What is capnography?

A

recording the CO2 measurement

36
Q

What is the continuous display of CO2?

A

capnogram

37
Q

How is CO2 monitoring accomplished?

A

infrared analysis