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25 Cards in this Set
- Front
- Back
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There are 5 standard monitor alarms:
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1. O2 supply pressure (on internal piping)
2. ORC (ratio controller) 3. O2 analyzer (MOST important!) 4. Breathing pressure monitor 5. Respiratory volume (TV, MV) |
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Describe the three tiered alarm prioritization
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Alarms appear in order of occurrence--but only highest priority alarm si annunciated
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What is a high priority alarm?
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High priority--WARNING
Flashing red Requires immediate attention (Ex: prolonged apnea) |
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What is a medium priority alarm?
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Med priority--CAUTION
Flashing Yellow Requires a prompt response (Ex: apnea, low TV, continuous high pressure) |
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What is a low priority alarm?
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Low priority--ADVISORY
Constant yellow (Ex: O2 analyzer not calibrated) |
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Alarms can be silenced for ___ sec, max of ____ sec
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60 sec
120 sec Max |
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What are the three possible results displayed on the machine screen when it is first turned on?
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Functional: all tests pass
Conditionally functional: Minor failure Non-functional: major failure |
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The O2 supply pressure alarm is activated when O2 is < ____ psi
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30 psi
(can be directly from wall or if something is occluding your o2 line) |
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How do you test that the ORC is working?
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Set O2 and N2O at 10LPM, Dec O2 to 3LPM and watch for automatic dec in N2O.
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The ORC maintains what ratio?
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O2/N2O ratio of 25+- 3%
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What is the most important alarm?
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O2 analyzer
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What are the two types of O2 analyzers?
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Galvanic sensor
Paramagnetic sensor |
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Explain how a Galavanic sensor works?
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On top of inspiratory valve, O2 reacts w/electrolyte material and creates a path for electrical current between anode and two cathodes. Current signal picked up and sent to processer for analysis
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Explain how a paramagnetic sensor works?
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Internal calibration
Alarms default at 20-30% (set alarm at 30, expose to RA and then calibrate) |
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If you calibrate an O2 sensor to less than RA, what will the display be?
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Display will be HIGHER than actual % O2
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If you calibrate the O2 sensor to >21% how will the affect the display?
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Display will be LOWER than actual % O2
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What is the High Pressure Alarm defaulted at?
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50cm H2O
(squeeze bag to make it go above 50 to check alarm) |
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When the patients PIP < set threshold pressure, what alarm will go off?
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Threshold pressure (apnea) alarm.
Warning--PIP<set threshold Caution--excessive PEEP ?25cm H2O Advisory--threshold set TOO LOW *Auto enabled when vent is turned on |
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How do you correctly set the threshold pressure apnea alarm?
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Set 6cm H2O < PIP
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When will the continouous (sustained) pressure alarm go off?
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When continuous pressure > threshold for > 15 seconds
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When does the sub-atmospheric pressure alarm go off?
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When pressure is <-10cm H2O
Warning alarm (Ex: pt breathing w/an obstruction) |
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Where is the spirometer located? What does it monitor?
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Located on expiratory limb of breathing circuit
Defaults MV <3LPM (nml adult is 4-5) Digital display of TV, BPM, MV |
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Exhaled TV= TV + _____
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Exhaled TV= TV + FGF
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When will a caution apnea alarm go off? A warning apnea alarm?
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Caution--breath (>80ml) not detected for 15 seconds
Warning--breath (>80ml) not detected for 30 seconds |
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What three things can set off the volume monitor (spirometer) alarms?
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1. Apnea (volume) alarm
2. Low Minute Volume 3. Reverse flow (>20ml thru sensor--alerts you to missing expiratory valve) |
