Respiratory Monitoring Flashcards
What is the pneumotaxic center and apneustic center responsible for?
- Rate and intensity of breathing
What is the ventral respiratory group responsible for?
- Forced breathing and respiratory rhythm
What is the dorsal respiratory group responsible for?
- Controls inspiration and timing
What is a pulse oximeter?
- Non-invasive continuous monitoring device that measures the arterial haemoglobin oxygen saturation using infrared
What should a normal plethysmogram look like and what does it indicate?
- Mountains
- Following cardiac contraction
What should a hypodynamic plethysmogram look like and what does it indicate?
- Little humps
- Hypovolaemia, vasoconstriction or low CO
What should a interfered signal plethysmogram look like and what does it indicate?
- Squiggly line
- Patient movement, poor contact or ambient light interference
What is capnography used for?
- Used to assess end-tidal carbon dioxide (ETCO2) achieved by measurement of infrared light absorption
What does a apnoea/absent trace capnography graph look like?
- Loss of trace
What is apnoea or absent trace caused by?
- Disconnection from breathing system
- Airway not patent
- Apnoea
- Capnograph calibrating
What does a hyperventilation capnography graph look like?
- Reduction in waveform
What is hyperventilation caused by?
- Poor CO
- High fresh gas flow
- Hypothermia
What does a hypoventilation capnography graph look like?
- Increase in waveform
What is hypoventilation caused by?
- Deep anaesthetic
- Hypothermia
- Drug administration
- Hyperthermia
What does a rebreathing capnography graph look like?
- Elevated waveform
