methods of oxygen administration #oxygen #mask
Channel: Harshit meena vlogs
Date: 2022-02-27

#oxygen #devices 
https://youtu.be/L4lRjB1Cchs

Oxygen: delivery devices

Oxygen delivery devices for medical student nursing students and peramedical students

Oxygen therapy

Oxygen is delivered from taps above ward beds at 100% concentration

It is then put through different devices at different rates to adjust the oxygen concentration that the patient inspires

The percentage of oxygen inspired depends on the flow rate and the delivery device

The flow rate can be set on the wall tap: it varies from 0 – 15L per minute

Delivery devices work with different flow rates. They include…

Nasal cannulae

Deliver 24-30% oxygen

Flow rate 1-4L/min (4L will dry the nose, 2L is more comfortable)

Used in non-acute situations or if only mildly hypoxic (e.g. saturations stable at 92% in a patient without lung disease)


Hudson mask (rarely used)

Delivers 30-40% oxygen

Flow rate 5-10L/min

Venturi mask

Delivers 24-60% oxygen

Different colours deliver different rates

Flow rate: Varies with colour. The correct flow rate to use with each colour it is shown on mask, along with the percentage of oxygen delivered.

 Types:

BLUE = 2-4L/min = 24% O2

WHITE = 4-6L/min = 28% O2

YELLOW = 8-10L/min = 35% O2

RED = 10-12L/min = 40% O2

GREEN = 12-15L/min = 60% O2

Venturi masks are often used in COPD, where it is important not to over-oxygenate the patient.

 
 Non-rebreather mask

Delivers 85-90% oxygen

15L flow rate

Bag on mask with valves stopping almost all rebreathing of expired air

Used for acutely unwell patients

Note that saturations should be maintained at 94-98%, not 100%.

Do not keep patients on 15L for longer than necessary as over-oxygenating for prolonged periods can be harmful.

Non-invasive ventilation (CPAP/BiPAP): click here for how to start patients on NIV 

CPAP (continuous positive airways pressure)

High pressure air/oxygen with a tight-fitting mask

Positive pressure all the time to help keep airways open (split them)

Used in acute pulmonary oedema and sleep apnoea

 BiPAP (bilevel positive airways pressure)

High positive pressure on inspiration and lower positive pressure on expiration