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Hyperbaric oxygenation (HBOT) is a 100% oxygen inhalation treatment inside a hyperbaric chamber. The patient is seated or lying in a hyperbaric chamber which is compressed to an overpressure of 2 bars. Oxygen is breathed through a mask, hood or tracheostomy tube. Depending on the disease, treatment lasts 90 to 300 minutes or more. It may be necessary to repeat the treatment several times a day.(more)
Hyperbaric oxygen therapy consists of inhaling pure oxygen in an environment that has an ambient pressure higher than normal atmospheric pressure. This requires a hyperbaric chamber. The hyperbaric chamber is compressed with air for safety and economic reasons. The physical laws, and in particular that of Dalton make the pressure in the mask or any other breathing system the same as in the hyperbaric chamber. We could say that a patient who breathes 100% oxygen under an overpressure of 2.4 bars in fact breathes 240% oxygen. Outside of a hyperbaric chamber oxygen inhalation is at most 100%.

Examples

Bubble reduction

The effect of the Boyle's law (p1xv1 = p2xv2) can be seen in many aspects of HBO. This can be useful for embolic phenomena such as decompression sickness (DCS) or arterial gas embolism (AGE). As the pressure increases, the volume of the bladder decreases. This is also important during decompression of the chamber. When a patient holds their breath, the volume of gas trapped in the lungs increases and can lead to pneumothorax.

Temperature change

Charles' law ([p1xv1] / T1 = [p2xv2] / T2) explains the increase in temperature during compression (increase in pressure) and the decrease in temperature during decompression (reduction in pressure). This can be important when treating children or very sick or intubated patients.

Increased amount of oxygen in the blood

The Henry's law says that the amount of gas dissolved in a liquid corresponds at the partial pressure of this gas on the surface of this liquid. In the compressed chamber, more oxygen can be dissolved in the patient's plasma than outside the pressure chamber.

Increased amount of oxygen in the tissues

Since the blood carries much more oxygen, it can supply the tissues with enormous quantities, especially where it is lacking. Then there are chemical reactions that trigger the healing process. This increased pressure causes oxygen to diffuse into the tissues and thus reaches areas with poor vascularity. The distance at which oxygen can diffuse from the last capillary is calculated with the mathematical diffusion model of Krogh

General
Side effects
Diving accident
Cerebral gas embolism
Carbon monoxide poisoning
Reperfusion injuries
Healing
Gas gangrene
Anti-inflammation
Bone formation, cartilage formation, ligament formation
Bactericidal effect
Preconditioning

Hyperbaric oxygen therapy is supported in ambulatory (TARMED) and hospital (DRG) settings for the following situations:

Chronic diabetic wounds
Anti-cancer radiation injuries
Chronic osteomyelitis
Maxillary osteomyelitis
Diving accident

HBOT indications which are currently not covered by swiss health insurance companies


Hyperbaric oxygen therapy, although supported by health systems in other countries, is currently not supported in Switzerland for the following situations:


Femoral hip necrosis
Sudden deafness
Accoustic trauma
Cerebral embolism
Necrotizing fasciitis
For emergency care where hospitalization is not necessary, the position 15.0380 according to the Swiss tarification TARMED with an hourly amount of CHF 450.36 .-- is used.
For non-urgent care, position 15.0370 according to the TARMED tarification will be billed TARMED. A standard session lasts 2 hours and costs 243.76 francs.