Anesthesia Machine & Breathing Circuits Flashcards
Carbon dioxide absorbent should be changed when all of the following occur EXCEPT:
A. inspired CO2 is greater than 4-5 mmHg
B. color change no longer occurs during use
C. heat is not evident during use
D. a majority of the granules no longer crumble, but are sharp and brittle
E. there is a leak of ethyl violet from the cannister
B
PEEP is created by installing a PEEP valve in an anesthesia machine in an effort to improve oxygenation. Sadly some downfalls of PEEP in an anesthetized patient include all of the following EXCEPT:
A. reduced renal blood flow
B. reduced lung compliance
C. reduced hepatic blood flow
D. reduced limb perfusion
E. reduced cardiac output
D
F air canisters absorb:
A. oxygen
B. excessive water vapor
C. nitrous oxide
D. excessive inhalant anesthesia
E. carbon dioxide that sodasorb misses
D
Vaporizers should be checked for calibration and serviced if needed when:
A. every 3 months regardless
B. when the last bell tolls
C. entire machine fell on its side
D. every American or Canadian holiday
E. when the animals aren’t staying asleep
C - liquid anesthetic will get into the bypass channel
usually done annually
The low pressure area of the anesthesia machine includes:
A. high pressure oxygen line
B. wall DISS connector
C. vaporizer
D. flowmeter
E. oxygen tanks
C
An essential part of a NON re-breathing circuit is the carbon dioxide absorbent soda lime. True or False?
FALSE - use no chemical absorbent for CO2 and depends entirely on high fresh has flow rates
An E cylinder of oxygen PSI reads at 1800. How many L of oxygen are left inside?
A. 1.2 L
B. 200 L
C. 678 L
D. 540 L
E. 100 mL
(full tank has 2200 PSI)
pressure (PSI) x 0.3 = L O2 available
1800 x 0.3 = 540 mL (D)
Rebreathing bags should be autoclaved after every use. True or False?
FALSE
All of the following are true regarding Rebreathing circuits EXCEPT:
A. require higher oxygen flow than non-rebreathing circuits
B. preserve body heat
C. easy to clean
D. used for larger body weight patients
E. provide slower changes in anesthetic depth compared to non-rebreathing circuits
A
Isoflurane was accidentally used to fill a Sevoflurane vaporizer. The likely outcome will be:
A. many patients will be “lighter” than normal
B. serious, because patients will be “deeper” than normal
C. a small explosion will occur fed by an oxygen fire
D. patients will sleep comfortably
E. vaporizer will not work, it’s broken
B
ISO = high vapor pressure, placed in sevo vaporizor results in high output of anesthetic
SEVO = low vapor pressure
Oxygen flush valves are used to clear a machine and circuit of a given concentration of anesthetic. They should be used with the patient attached to create an even quicker change in anesthesia concentration True or False?
FALSE - never used when a patient is attached
All of the following are true regarding NON rebreathing circuits EXCEPT:
A. used on smaller patients
B. provide rapid changes in anesthesia depth compared to rebreathing circuits
C. easy to clean
D. used for tiny patients
E. can add to hypothermia because of the high oxygen flows required to rid CO2
E - causes hypothermia due to inhalation of dry, cold air
All of the following are features of desflurane that are relevant in veterinary practice EXCEPT:
A. particularly obnoxious odor
B. lower blood gas solubility than sevoflurane
C. significantly metabolized in the liver
D. less potent than isoflurane and isoflurane
E. requires special, electrically powered vaporizer
C
