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(1) Inspections and preparations before pressurization: 1. Medical oxygen chambers must have been inspected by a certified testing agency and be within the valid period of that inspection. The personnel responsible for the maintenance of medical oxygen chambers must receive training and assessment from an institution recognized by the authorities in charge of safety supervision of special equipment, and must obtain a qualification certificate before they can take up their duties. 2. Operators of medical oxygen chambers must provide safety training to those entering the chamber. Entrants are not allowed to bring any kindling or flammable, explosive items, nor should they wear clothing, shoes, or hats that can generate static electricity. It is strictly prohibited to place items contaminated with oil inside the cabin. 3. Check and confirm that the oxygen concentration over-limit alarm device of the oxygen meter is sensitive and reliable ； After the oxygen concentration exceeds the limit, it can simultaneously emit audio and optical alarm signals ； It must be ensured that the oxygen concentration inside the cabin remains below 25%; if it exceeds this level, ventilation is required to replace the air. The concentration should be measured again after 3 minutes of ventilation, and this process should be repeated until it meets the specified standards. 4. Check and confirm that the emergency power supply system for the medical oxygen chamber is in good condition and can be activated automatically, with a operation time of no less than 30 minutes. 5. Check and confirm that the intercom system of the medical hyperbaric chamber and the contactless emergency alarm buttons inside the chamber are functioning properly ； The aforementioned device can also function properly when the external power supply is interrupted; operation verification should be carried out if necessary. 6. Check and confirm that the accessories on the console, such as intercoms, emergency calls, oxygen concentration monitors, and air conditioning systems, are operating properly, and that all instruments display accurate readings. 7. Check whether the oxygen supply and exhaust pipeline systems are unobstructed ； The handwheels of the oxygen (gas) inlet and outlet valves should be intact, with smooth operation and no leaks; all instruments and control devices for oxygen (gas) supply and discharge should be complete, in good condition, and clean. 8. Check whether the internal and external emergency exhaust valves operate smoothly, whether protective measures have been taken for these valves, and whether there are clear markings on them. 9. It shall be confirmed that the safety interlock devices of quick-opening hatches and cargo delivery tubes are sensitive and reliable; pressure testing methods may be employed for verification when necessary. 10. Check whether the type of fire extinguishers in the cabin meets the requirements and is within its valid period; for oxygen cabins equipped with a water-based fire suppression system, it is necessary to test whether this system functions reliably when required. 11. Check that the readings on the air supply pressure gauge, oxygen supply pressure gauge, and oxygen source pressure gauge are within the allowable range. 12. Inspection procedures and results should be recorded. (II) Pressurization operation 1. Adjust the opening degree of the gas storage tank valve so that the indicated gas supply pressure matches the value specified in the oxygen chamber user manual. 2. Adjust the chamber pressure valve, observe the chamber pressure gauge and timer, and slowly increase the pressure at a rate specified by medical requirements. 3. Voltage stabilization operation. 4. Operators of the hyperbaric chamber must constantly monitor changes in the chamber pressure. By adjusting the intake and exhaust valves, they should keep the chamber pressure stable at the specified value. 5. After the patient starts receiving oxygen, the hyperbaric chamber operator must pay attention to changes in the oxygen concentration inside the chamber. When the oxygen concentration exceeds the specified limit, measures should be taken to dilute it by introducing air, thereby reducing the oxygen concentration within the chamber. Throughout this process, the chamber pressure must be kept constant. 6. During treatment in the chamber, if it is necessary to pass items through a delivery tube, this must be done under the supervision of the oxygen chamber operator. (III) Decompression operation: 1. Adjust the chamber’s decompression valve, observe the chamber pressure gauge and timer, and slowly decompress at a rate specified by medical requirements. 2. When the indicated pressure inside the cabin is zero, release any remaining air through the interconnecting valve of the transfer tube. Only after confirming that there is no pressure inside the cabin may the hatch be opened.