What is a soft hyperbaric oxygen chamber
High-pressure oxygen chambers are roughly divided into two categories according to their pressure-bearing structure. One type uses a rigid shell to bear pressure and belongs to the hard cabin; the other type uses flexible fabric materials to make a closed cabin and belongs to the soft cabin. The term “soft” corresponds to the latter. It is also commonly called “fabric”, “inflatable” or “portable hyperbaric chamber” on the market, which actually refers to the same flexible pressure-bearing structure. The benefits of a soft cabin are intuitive: the cabin can be folded and stored, is lightweight, and can be used in a home environment with an air compressor and oxygen concentrator, taking up relatively little space.
How much pressure does 1.5 ATA represent
The 1.5 ATA marked on the soft compartment refers to the absolute pressure inside the compartment. ATA is an abbreviation for atmosphere absolute, calculated based on the absolute vacuum zero point; 1 ATA is a standard atmospheric pressure, equal to 101.325 kPa. Based on this benchmark, the absolute pressure of 1.5 ATA is 151.9875 kPa, which is approximately 22.04 psia. Changing to gauge pressure is more intuitive. Gauge pressure is the difference between the cabin pressure and the local atmospheric pressure. Under standard sea level conditions, 1.5 ATA corresponds to a gauge pressure of approximately 7.35 psig, which is equivalent to adding about half an atmosphere of pressure above atmospheric pressure.
A misunderstanding is likely to arise here. 1.5 ATA refers to an absolute pressure of 1.5 atmospheres in total, rather than an additional 1.5 atmospheres added to the normal atmospheric pressure. This is why when looking at the soft compartment specifications, it is essential to distinguish between ATA absolute pressure, psia, and psig calibers; they cannot be directly compared.
Pressure limit of the soft compartment
The soft cabin is supported by fabric, and the upper pressure limit is naturally lower than that of the hard cabin. Taking the MACY-PAN’s soft cabin as an example, the pressure specifications of both the single-person recumbent and seated soft cabins cover three gears: 1.3, 1.4, and 1.5 ATA. 1.5 ATA is exactly the upper edge of this section of the soft cabin. The cabin is made of TPU. The single-person horizontal cabin weighs about 13 kilograms and is about 220 centimeters long and 80 centimeters in diameter when unfolded. The diameter of the widened horizontal cabin is increased to about 90 centimeters. Seated cabins are available in compact models with L-shaped zippered entrances, as well as models with adjustable folding chairs that can be used for sitting or reclining, and generally weigh between 12 and 16 kilograms.
There is one thing that needs to be made particularly clear here. While learning about the product, I occasionally see the term 2.0 ata soft hyperbaric chamber, which literally means a software compartment that can reach 2.0 ATA. However, according to MACY-PAN’s product line, the rated pressure of the soft compartment is as high as 1.5 ATA. Those that are truly designed according to 2.0 ATA are all stainless steel shells and hard compartments that need to be fixedly installed. The soft cabin uses flexible fabric as the pressure boundary, and the pressure ceiling is lower than that of the hard cabin. Therefore, when you see a combination of 2.0 ata soft hyperbaric chamber, it is worth checking the pressure specifications and cabin structure of the specific model to confirm whether it is software or hardware.
Differences between 1.5 ATA soft chamber and clinical hyperbaric oxygen
Soft cabins fall under the category of low-pressure cabins. There is a clear definition threshold for clinical hyperbaric oxygen therapy: patients must breathe medical-grade oxygen at a pressure of not less than 2.0 ATA in a hard compartment that complies with the corresponding pressure vessel and fire safety regulations. Common clinical treatment pressures are between 2.0 and 3.0 ATA. Exposure to air pressure below this threshold is generally not included in the definition of therapeutic hyperbaric oxygen.
Therefore, a 1.5 ATA soft chamber, with or without oxygen or HBOT in its name, cannot be used as a clinical hyperbaric oxygen therapy device based solely on pressure numbers. Its value falls more on non-clinical scenarios such as daily family life, exercise recovery, relaxation and stress reduction. When making a purchase, don’t be obsessed with the higher the pressure, the better: higher pressure does not automatically mean better fit, better results or safer. The key is to see if it matches your actual use.
What to check when selecting a 1.5 ATA software cabin
After locking the 1.5 ATA software bay, there are a few things worth confirming item by item. In terms of pressure, in addition to the number 1.5 ATA, we also need to look at the normal operating pressure, the maximum allowable operating pressure, and the set pressure of the pressure relief device. Do not let one number replace all parameters. In terms of structure, it is necessary to confirm the cabin materials, number of layers, valves and pressure resistance range. Different soft cabins are different in these details. In terms of supporting facilities, the soft cabin is actually a system, which usually works together with the cabin, air compressor and oxygen generator. The oxygen concentration provided by the oxygen generator is generally above 93%, and it also needs to be equipped with an air cooler. In terms of posture, the reclining position is suitable for lying down, and the sitting position is suitable for people who want to sit or lean back. You can choose according to your own usage habits.
Safety points in use
When using the soft compartment, follow the instructions for the specific model and do not change the pressure setting on your own. An environment with high oxygen concentrations will increase the risk of fire. During operation, pay attention to ventilation, fire protection and grounding, and do not bring electrical or electrostatic items into the cabin that are not permitted by instructions. During use, compliant personnel should continuously monitor the equipment, and the equipment should also undergo cleaning, maintenance, and safety inspections according to the manufacturer’s specified cycle. When considering the pressure, structure, purpose and compliance status, a 1.5 ATA software cabin can be truly selected and used with confidence.
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