We can say that oxygen therapy has been the evolution of hyperbaric therapy which has been used in the last 30 years to treat different pathologies connected to circulatory and infective deficit.
As regards the use of oxygen therapy towards devitalized tissues and ulcers of the lower limbs this can be used in two ways:
1) Oxygen therapy with hyperbarism
2) Oxygen therapy with normobarism
A) Principles on which hyperbaric oxygen therapy is based
Oxygen acts on devitalized tissues or in a way needing a greater supply of oxygen, with a mechanism of contact and oxygen dissolved in the blood (modest increase of oxygen connected to the haemoglobin but a considerable increase of oxygen dissolved in the plasma). We should remember that in the hyperbaric chamber the atmospheric pressure increases with hyperbarism while the concentration or partial pressure of oxygen remains constant.
B) Indications of hyperbaric oxygen therapy
In any case there are benefits for all tissues, devitalized or of little vitality through local or general causes. Decubitus sores, complex injuries, sores in diabetics, sores in arteriopathy and phlebopathy cases are cited.
C) Counter-indications of the hyperbaric chamber
There are counter-indications for indiscriminate use of this chamber since not all people can utilize them (increase in pressure counter-indicated in people with cardio-circulatory problems or problems of the vestibular or cochlear passages).
D) Principles on which normobaric oxygen therapy are based
Oxygen acts on tissues which are devitalized or anyway needing a greater oxygen supply, with contact mechanism. In the normobaric chamber the concentration of oxygen rises from 23% to 95% and therefore increases by about 4 and a half times the quantity of oxygen which comes into contact with the devitalized tissues.
E) Indications of normobaric oxygen therapy
In any case there are benefits for all tissues whether devitalized or of little vitality for local or general causes. Decubitus sores, complex injuries, sores in diabetics, sores in arteriopathy and phlebopathy cases are cited.
F) Counter-indications of the normobaric chamber
There is no counter-indication for indiscriminate use of this chamber since everybody can use it (there are no counter-indications found in the hyperbaric chamber since the oxygen surrounds only the limb which holds the injury to be treated and does not modify the breathing or the coenesthesia of the cardio-circulatory or cochlear-vestibular apparatus.