Oxygen therapy involves administering oxygen at higher concentrations to treat conditions like hypoxemia and respiratory distress. It is crucial in various medical situations, including severe trauma and chronic lung diseases. However, prolonged use can lead to oxygen toxicity and requires careful monitoring to avoid increased CO2 levels and other complications.

1. Oxygen therapy
By
Dr.Mukesh Singh pachahara
M.D Anaesthesiology
NMC&H

2. Meaning of oxygen therapy
● Oxygen therapy is the administration of o2 at a
concentration of pressure greater than that found
in the environmental atmosphere
● Air we breathe in contains approximately 21% of
oxygen
● The heart and other organs relies on oxygen to
work properly
● Oxygen therapy is a key component of treatment
in respiratory care,purpose is to increase oxygen
Saturation in tissues where the oxygen levels are
too low due to illness or injury.

3. Uses of oxygen therapy
● Documented hypoxemia
● Respiratory distress (Asthma/pneumonia)
● Severe trauma
● COPD(chronic bronchitis,emphysema,chronic asthma)
● PAH
O2 therapy can be used to treat, acute myocardial infarction ,post Anesthesia recovery etc
Indications to initiate o2 therapy are
1. Clinicians observation
2. ABG showing hypoxia
3. Pulse oximetry

4. Categories of oxygen devices
Low flow Reservoirs High flow Enclosures
Nasal canula Reservoir cannula HFNC
Air entrainment
mask(Venturi) with
or without
aerosol/nebulizer
Oxyhood
Isollete or incubator
Transtracheal
catheter(Scoop)
Simple mask Briggs adapter T-
piece
Face tent
Tracheostomy mask
Oxygen tent
Tracheostomy with
an HME
Partial rebreathing
mask/non-
rebreathing mask
Blender
High o2 flow mixers
Hyperbaric chamber

8. Others: Atelectasis

9. ● Oxygen toxicity can
occur in prolonged use
of fio2 more than
50%(>48hrs)
● Infection
● Suppression of
ventilation will lead to
increased co2 & can
further lead to co2
narcosis
● Use electrical gadgets
cautiously where oxygen
supply is present.
Other Dangers of o2 use:

10. References :
● Millers anaesthesiology 9th edition
● CGA
● Louisville lectures
● Researchgate
● If any references forgotten ,plz forgive.
Thank you
presentation by,
Dr.Mukesh Singh pachahara
Pg-1 resident ,MD-Anaesthesiology
NMC&H