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Intro to Anesthesia: Part A > Anesthesia Machine > Flashcards

Anesthesia Machine Flashcards

1
Q

Gas Cylinder Colors

  1. O2
  2. N2O
  3. Air
  4. CO2
  5. N
  6. H
A
  1. Green (white)
  2. Blue
  3. Yellow
  4. Grey
  5. Black
  6. Brown
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2
Q

Empty E-Cylinder Weight

A

5.8 lbs

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3
Q

Circle System Check

A

Extends from CGO to the Y-pieceLeak test: occlude y-piece, close APL, pressurize to 30 mmHg using the O2 flush valve

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4
Q

Machine Check Overview (8 Items)

A
  1. Gas Line Connections
  2. Integrity of seal system/gas pressures
  3. Low Pressure Circuit Test
  4. Vaporizer Levels
  5. Flow Meter Controls
  6. O2 Analyzer
  7. Circle Circuit Test/Scavenging System
  8. Ventilator

*check analyzer by exposing to room air and reading 21%

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5
Q

Intermediate Pressure System (7 Items)

A
  1. Master Switch (pneumatic part)
  2. Pipeline (wall) Inlets (DISS)
  3. Pipeline Valves, gauges
  4. Oxygen second stage regulators
  5. O2 pressure-failure device/alarm
  6. O2 flush valve
  7. Flow meter valves
    * O2 inlet will be 50 psi, cylinder will be 45-50 or just slightly lower than inlet; system pressure 45-50 psi
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6
Q

5 Pathways of Oxygen

A
  1. Flow to the fresh gas meters
  2. Powers the oxygen flush valve
  3. Activates failsafe valve
  4. Activates oxygen low pressure alarm
  5. Compresses bellows
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7
Q

Low Pressure Circuit Test

A

Checks from flow control valves to CGO. Place suction valve on CGO and squeeze till collapsed; must remain collapsed for 10 seconds or more. Also check for low pressure O2 alarm; check individual vaporizers for leaks

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8
Q

Oxygen Failsafe Shut Off Pressure

A

25-30 psi
Most are Proportioning Type (OFPD); drop N2O based on O2 PRESSURE not FiO2.
Located downstream of N2O source; shuts off or proportionally reduces N2O flow if O2 decreases to prevent hypoxia

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9
Q

PISS system configurations:

  1. O2
  2. N2O
  3. Air
  4. CO2
  5. Heliox
A

Pin Index Safety System

  1. 2,5
  2. 3,5
  3. 1,5
  4. 1,6
  5. 2,4
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10
Q

Bobbin Flow Types

A
  1. Low Flow: Laminar flow (diameter of channel < than length), so VISCOSITY is important
  2. High Flow: Turbulent flow, gas flowing around bobbin through orifice (diameter of channel > length) so DENSITY important
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11
Q

Oxygen Cylinder: contents and pressure

A

625-700L; 2000-2000 psi

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12
Q 
First Stage Pressure Regulator:
1. O2
2. N2O
Second Stage Pressure Regulator:
1. O2
2. N20
A 
First Stage:
02: 2000 -> 45
N2O: 745 -> 45
Second Stage:
O2: 45 -> 14
N2O: 45 -> 26

*N2O at higher pressure so that it flushes out of the system if there’s a leak

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13
Q

Low Pressure System (6 items)

A

Pressure slightly above atmospheric

  1. Flow Meter Tubes (Thorpe tube)
  2. Proportioning Links (Hypoxic Guard)
  3. Vaporizer
  4. Check Valves
  5. Pressure Relief Device
  6. Common Gas Outlet
  • most susceptible to leaks; O2 ANALYZER only alarm in low pressure
  • O2 always furthest right on tubes (downstream) to prevent hypoxic mixture if leak is present in N2O or Air tubes; won’t prevent hypoxic mixture if O2 tube leaking
  • Hypoxic guard won’t allow mixture of O2 <25%
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14
Q

Oxygen Flush Valve flow rate

A

35-75 L/minCan cause barotrauma; only use during expiration

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15
Q

High Pressure System Components (5 items)

A

Pressure > 45 psi

  1. Cylinders (PISS)
  2. Cylinder Hanger yokes
  3. Yoke blocks with check valves
  4. Cylinder pressure gauge
  5. 1st Stage pressure regulator
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16
Q

Pressurized Air Cylinder: Contents and Pressure

A

Approx 625L; 1800 psi

17
Q

Common Vaporizer Problems (7 items)

A
  1. Overfilling
  2. Contamination
  3. Wrong Agent
  4. Pumping Effect
  5. Tipping
  6. Leaks
  7. Administration of multiple vapors
18
Q

Describe Minimal Sedation:

  1. Cognition
  2. Respiratory
  3. Cardiovascular
A
  1. Anxiolysis; Respond to comands; cognition and coordination may be impaired;
  2. Unaffected
  3. Unaffected
19
Q

Describe Moderate Sedation:

  1. Cognition
  2. Respiratory
  3. Cardiovascular
A
  1. Conscious sedation; patients respond to commands either verbally or with tactile stimulation
  2. No interventions needed to maintain airway/ventilation 3. Cardiovascular function usually maintained
20
Q

Describe Deep Sedation:

  1. Cognition
  2. Respiratory
  3. Cardiovascular
A
  1. Not easily aroused, responds to painful or repeated stimulation
  2. Airway protection and respiratory function usually impaired
  3. Cardiovascular function usually maintained
21
Q

Describe General Sedation:

  1. Cognition
  2. Respiratory
  3. Cardiovascular
A
  1. Not arousable, even by painful stimulation
  2. Requires complete assistance maintaining ventilation/airway
  3. Cariovascular function usually impaired
22
Q

Anesthesia Workstation Standards overseen by…

A

American Society for Testing and Materials (ASTM)

23
Q

Machine Checks Should be done…

A
  1. Complete check every 24hrs

2. Circuit check between each patient

Intro to Anesthesia: Part A (6 decks)

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