Different types of oxygen therapy Flashcards
examples of oxygen delivery devices
Nasal cannula Hudson mask Venturi mask Non-rebreather mask Non-invasive ventilation invasive ventilation
what does a nasal cannula deliver?
delivers 24-30%
flow rate of nasal cannula
1-4L/min
use of nasal cannulas
non-acute ward use
if someone is mildly hypoxic
comfortable
hudson mask delivery
30-40%
flow rate of hudson mask delivery
5-10L/min
uses for hudson mask
step up from nasal cannula
doesn’t deliver specific % of oxygen like venturi
what is the oxygen delivery of venturi mask?
24-60%
what is the flow rate of venturi mask?
different flow rates set on O2 wall tap
different types
what are the different types of venturi mask?
blue white yellow red green
blue venturi mask
2-4L/min
24% O2
white venturi mask
4-6L/min
28% oxygen
yellow venturi mask
8-10L/min
35% oxygen
red venturi mask
10-12L/min
40% oxygen
green venturi mask
12-15L/min
60% oxygen
uses of venturi mask
COPD
non-rebreather mask oxygen delivery
85-90%
non-rebreather mask flow rate
15L
how does a non-rebreather mask work?
bag on mask with valves stops almost all rebreathing
use of non-rebreather mask
acutely unwell patients
non-invasive ventilation
CPAP
BiPAP
CPAP
continuous positive airway pressure
high pressure air/oxygen with a tight fitting mask
positive pressure all the time
use of CPAP
keeps airways open in sleep apnoea or heart failure
BiPAP
bilevel positive airway pressure
high positive pressure on inspiration and lower positive press on expiration
use of BiPAP
COPD and atelectasis
invasive ventilation
100%
ventilation bag or machine is attached to an artificial airway to ventilate lungs
when is invasive ventilation used?
intensive care and theatre
when to intubate?
if GCS is less than or equal to 8
what oxygen saturation level is problematic?
below 90%
when to do ABG?
anyone with oxygen saturations of <92%
humidified oxygen
can help with secretions and useful if prolonged oxygen therapy is required
what causes CO2 retention?
COPD bronchiectasis CF neuromuscular disease severe kyphoscoliosis severe obesity
treating CO2 retainers
start on 24-28% venturi mask if no ABG results
give high flow oxygen if they are in respiratory distress or dangerously hypoxic
hypoxia with hypercapnia
hypoxic drive likely so give 24-28% venturi mask
hypoxia without hypercapnia
hypoxic drive unlikely
can try higher flow rate of oxygen
hypercapnia and acidosis worsening
reduce oxygen and consider non-invasive ventilation if oxygen levels stay dangerously low
hypercapnia and acidosis stable/improving
scope to increase oxygen
if sats of 88-92% cannot be reached in CO2 retainers
if this cannot maintained without decreased respiratory drive and causing hypercapnic acidosis then non-invasive ventilation needed
