Capnography Flashcards
What is Capnometry
CO2 assessment by numbers
What is Capnograph
CO2 assessment by waveform
Placean E on the expiration and an I on the inspiratory phase
Identify what is hapening at each number phase of the waveform:
1
Base line
Identify what is hapening at each number phase of the waveform:
2
begining of expiration
Identify what is hapening at each number phase of the waveform:
2-3
combination of deadspace and aveolar gases
Identify what is hapening at each number phase of the waveform:
3-4
Alveolar plateau (alveolar gas plateau)
Identify what is hapening at each number phase of the waveform:
4
Actual alveolar ETcO2
pt begins to inspire Co2 free gasses
Identify what is hapening at each number phase of the waveform:
4-5
Inspiratory Limb
Inspiration to baseline of 0 unless there is rebreathing
Identify what is hapening at each number phase of the waveform:
6
End of inspiration
what difines normal ETcO2 wave form in the trachea?
3 waves at 30mmHg
What does this waveform indicate
Esophageal intubation
what does this waveform indicate:
incompetent expiratory valve
exhausted Soda lime canister
what does this waveform Show:
prolonged upstroke
Prolonged expiratory plateau
what does this waveform indicate:
incompetent inspiratory valve
Bc- not returning to zero axis
and inspiratory limb prolonged
what does this waveform indicate:
Hyperventilation
- amplitude is less
- ventilation rate is increased
what does this waveform indicate:
Hypoventilation
- note Y axis scale
- Note slow respiratory rate
- probably a chronic condition
what does this waveform indicate:
Inspiratory effort
- lack of adequate paralysis
- alveolar plateau is key to notice
what does this waveform indicate:
cardiac oscillations
what does this waveform indicate:
external chest compressions
what does this waveform indicate:
Incompetent inspiratory valve
-note take off angle
what does this waveform indicate:
MH
- Note the very very very rapid increase in ETcO2
what does this waveform indicate:
hypoventilation
-Acute b/c does not reflect hypercapnia
what does this waveform indicate:
PE
- ETCO2 low
- Alveolar Plataeu angeled
- Rate increased
what would an obstructed waveform look like
no longer a top hat
expiratory limp slanted (crushed top hat)
What are 2 things when interperating these you should look at?
Y -axis to see if Etco2 normal or abnormal
Respiratory rate
both can help you reduce your answers
practice: what is this wave form showing and what are some possible causes?
obstruction
COPD/Asthma/ bronchitis
