Oxygen Delivery System

Oxygen delivery system

An oxygen delivery system is defined as the total system used for the delivery of the oxygen from the oxygen source to the patient. Some of the instruments used in this system are stated below.


Oxygen which occupies 21% of the total air is the second most abundant gas after nitrogen. It is generally colorless, odorless, and tasteless in a normal condition. It is inflammable in nature but is a catalyst for burning the fire.


  • Do not allow fire, sunlight, electric sparks, or smoking near the oxygen source.
  • Keep the oxygen source in an open or properly ventilated area. If there is minor leakage of oxygen from the oxygen source it will escape to the surrounding.

          Do not use:

  • Petroleum products such as vaseline on your face
  • Oil-based face creams or lotions
  • Hair spray and paints

Why 100% of oxygen is not used during the oxygen delivery system?

We know that, when oxygen goes through the lungs, it binds with the hemoglobin of the RBC cells. These cells act as a carrier for the oxygen throughout the body. Breathing 100% oxygen will increase the oxygen concentration in the blood by about 10%. Fully oxygenated blood will carry about 200 ml of oxygen in 1 liter of blood.

Lungs will not be able to process 100% pure oxygen. So, the remaining oxygen will then bind with the surface proteins of the lungs and damage them. Since oxygen is toxic in nature it will affect the central nervous system and eyes.

Few researchers believe that by lowering the O2 concentration to 40%, patients can receive it for a longer period of time without the risk of toxicity.

Effect of the temperature variation of oxygen in the human body

The high temperature will cause the excitation of the oxygen molecules. It will gain more velocity. This will increase the rate of diffusion from the alveolar sac to the blood capillaries.

Why is it important to humidify oxygen?

When dry oxygen is supplied to the patient, it will drive the water molecules away from the nasal canal. This will cause nasal irritation. Some other effects can be:

  • Fatigue
  • Headache
  • Bloody nose or skin irritation



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