Nitrous delivery & technique Flashcards

(29 cards)

1
Q

what are the 2 main types of Nitrous delivery?

A
  • Demand Flow Unit

* Continuous Flow Unit

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2
Q

what are the 3 main parts of a demand flow unit?

A

mixing valve, pressure regulator, demand valve

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3
Q

what are the 2 main components of a continuous flow unit?

A

flowmeters, reservoir bag

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4
Q

what is the advantage of portable nitrous tank units?

A

economics

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5
Q

Regulators reduce pressure from ________ psi to a safe _______psi

A

from 750-2200psi to a safe 45-55psi

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6
Q

what are the 4 types of terminal apparatus?

A

Nasal Cannula
Nasal Hood
Full Face Mask
Scavenging Nasal Hood

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7
Q

flowmeters display the gas in motion with an accuracy of __%

A

±2%

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8
Q

T/F: the N2O tube is blue & fluted

A

FALSE

N2O blue & non-fluted

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9
Q

Flowmeters can adjust output in increments of __ liters

A

0.1 L

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10
Q

what does the “non-silencable” alarm signal?

A

Oxygen depletion

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11
Q

all flowmeters come equipped with am Emergency _______ _________ Valve

A

Air Intake

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12
Q

what are the safety features of N2O systems?

A

1) Minimum O2 liter flow
2) Minimum Oxygen Percentage
3) DISS - different diameter and different thread
4) PISS- pin index safety system
5) Oxygen Fail-Safe
6) Emergency Air Inlet
7) Alarm
8) O2 Flush Button
9) Reservoir Bag
10) Colo(u)r Coding
11) Quick-Connect Positive Pressure O2

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13
Q

what are the 3 types of Inhalation units?

A
  • Accutron - N2O lock
  • Porter - automatic vacuum
  • Matrx
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14
Q

why is an automatic interlock system important to use?

A

Use an automatic interlock system to assure that the N2O cannot be turned on unless the scavenging system is also activated

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15
Q

the scavenging system exhaust rates (flow rates) should be at least ______ liters per minute (L/min)

A

45 L/min

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16
Q

If concentrations of N2O are above ____ ppm in work areas, increase the air flow into the room or increase the percentage of outside air

17
Q

Nitrous oxide/oxygen when used in combination with sedative agents may produce what levels of sedation?

A

anxiolysis, conscious or deep sedation or general anesthesia

18
Q

T/F: During administration of enteral and/or combination inhalation-enteral conscious sedation (combined conscious sedation), AT LEAST one additional person should be present in addition to the dentist

19
Q

If nitrous oxide and oxygen delivery equipment capable of delivering less than ___% oxygen is used, an in-line oxygen analyzer must be used

20
Q

during the use of N2O, how is Oxygenation monitored?

A
  • Color of mucosa, skin or blood should be continually evaluated.
  • Oxygen saturation must be evaluated continuously by pulse oximetry.
21
Q

during the use of N2O, how is Ventilation monitored?

A
  • Must observe chest excursions.

* Should auscultate breath sounds or monitor end- tidal CO2.

22
Q

T/F: Oxygenation must be monitored continuously, even during recovery periods when only oxygen is being used

A

True

  • patient must have continuous supervision until oxygenation, ventilation and circulation are stable
23
Q

The doctor must determine and document that _______, ______ and ______ are stable prior to discharge

A

oxygenation, ventilation and circulation

24
Q

which receptor is needed for the action of Nitrous oxide?

A

The NMDA Receptor Subunit NMR-1

N-methyl-D- aspartate receptor for its action in C. elegans

25
how are the fail-safes of N20 systems tested?
A) Plumbed: disconnect oxygen B) Portable: close tank valve C) Both: try to give >70% nitrous oxide
26
how do you "titrate" N2O?
1) start with 10% Nitrous 2) wait 2-3 minutes 3) increase by about 15%
27
how can you evaluate the level of nitrous sedation?
1) Listen to words, but also how they respond: slowly, monotone, relaxed sound? 2) evidence of sedation: - Visibly settled into chair - Hands relaxed - Legs uncrossed - Eyes not following all movement in room
28
what are the signs of over sedation?
A) Closed eyes B) Slow verbal responses C) Can’t keep mouth open D) Hard to engage in conversation
29
what information must be included in your notes?
Document length of sedation, % used, comment on effectiveness, post-oxygenation time