Respiratory Failure Flashcards
occurs?
when gas exchange in inadequate - hypoxia
occurs?
when gas exchange in inadequate - hypoxia
PaO2
Type 1 resp failure
hypoxia with normal/low PaCO2
type 1 caused
ventilation/perfusion mismatch
examples
- pneumonia
- pulmonary oedema
- PE
- Asthma
- Emphysema
- Pulmonary fibrosis
- ARDS
type 2 resp failure
hypoxia >8kPa and hypercapnia >6kPa
type 2 caused
alveolar hypoventilation with/without V/Q mismatch
examples
- pulmonary- asthma, COPD, end-stage pulmonary fibrosis, obstructive sleep apnoea
- decreased resp drive- sedative drugs, CNS tumour, trauma
- neuromuscular disease
- thoracic wall disease
Hypercapnia symptoms
- headache
- peripheral vasoldilation
- tachycardia
- bounding pulse
- tremor/flap
- confusion
Hypercapnia symptoms
- headache
- peripheral vasoldilation
- tachycardia
- bounding pulse
- tremor/flap
- confusion
PaO2
Type 1 resp failure
hypoxia with normal or low PaCO2
caused
ventilation/perfusion mismatch
examples
- pneumonia
- pulmonary oedema
- PE
- Asthma
- Emphysema
- Pulmonary fibrosis
- ARDS
type 2 resp failure
hypoxia >8kPa and hypercapnia >6kPa
caused
alveolar hypoventilation with/without V/Q mismatch
examples
- pulmonary- asthma, COPD, end-stage pulmonary fibrosis, obstructive sleep apnoea
- decreased resp drive- sedative drugs, CNS tumour, trauma
- neuromuscular disease
- thoracic wall disease
hypoxia symptoms
- dyspnoea
- restlessness
- agitation
- confusion
- central cyanosis
Hypercapnia symptoms
- headache
- peripheral vasoldilation
- tachycardia
- bounding pulse
- tremor/flap
- confusion
investigations
- Bloods: FBC, U&E, CRP, ABG
- CXR
- sputum culture
- spirometry
management of type 1 resp failure
- treat underlying cause
- O2 (35-60%) facemask to treat hypoxia
- assisted ventilation if PaO2
management of type 2 resp failure
- treat underlying cause
- O2 starts at 24%
- ABG after 20 mins, If PaCO2 decreased or steady then increase O2 28%
- assisted ventilation PaCO2 >1.5kPa
- intubation