63R. Oxygen Prescription Guidelines Flashcards
what does oxygen treat
hypoxaemia
what does oxygen not treat
breathlessness
reversing hypoxaemia is always helpful. T or F
false
High flow/concentration oxygen requirement is a sign of what?
severe disease
what are the oxygen saturation targets for chronic type 2 respiratory failure
88-92%
what are the oxygen saturation targets for ischaemia / infaction
accept lower SaO2
what are the oxygen saturation targets for other types of respiratory issues not ischaemia or type 2 resp failure
94-98%
what does type 1 respiratory failure require
oxygen
who can type 2 resp failure develop in
anyone
what is acute or chronic type 2 resp failure triggered by
over oxygenation
what is the treatment for hypercarbia
NIV
what is hypercarbia
excess carbon dioxide in blood
what is NIV
non invasive ventilation
who should you give unrestricted oxygen to
patients with cluster headaches, carbon monoxide poisoning, untreated pneumothorax and sickle cell crisis
name the four oxygen delivery devices and describe them
nasal cannulae -low flow, uncontrolled FiO2, dependent on nasal breathing
Variable performance mask - up to 5-15l/min, uncontrolled FiO2
Venturi mask - fixed performance, up to 250l/min, gold standard
Non rebreathing mask - up to 85% FiO2, flow limited to wall outflow, few indications (eg. CO poisoning, PTX, cluster headaches, sicklecell crisis)
how do you work out the minute ventilation
Vmin = VT x RR
at rest what is minute ventilation
5 to 40 L per min
when you are unwell, what is your minute ventilation
400 L per min
what is the max flow from a hospital wall
15 L per min
Giving more oxygen to patients with ischaemia (of the heart or brain) does what? Why? what oxygen is recommended for these patients
Can do more harm than good.
This is because excessive oxygen can lead to oxidative stress and worsen outcomes.
A target saturation range of 94-98% for these patient
For COPD patients, the recommended target remains ……. to avoid the risk of hypercapnic respiratory failure
SaO2 88-92%
