Medical gas refers to the gas used for medical purposes. Mainly used for treatment, anesthesia, driving medical equipment, medical experiments, culture of bacteria and embryos. Commonly used gases are: oxygen, nitrous oxide, carbon dioxide, argon, helium, nitrogen, compressed air and mixed gases.
Uses of Medical Gases：
1. Oxygen: Oxygen is the basic substance for sustaining life, and it is medically used to supplement oxygen for hypoxic patients. Note that directly counting high-purity oxygen is harmful to the human body. The oxygen concentration used for a long time is generally 30%-40%. Oxygen is also used in hyperbaric chambers to treat diving diseases, gas poisoning, and for drug nebulization.
2. Nitrous oxide: After a person inhales a small amount of this gas, muscle spasms will occur on the face and a smiling expression will appear, so this gas is also called laughing gas. Medically, nitrous oxide is mixed with oxygen as an anesthetic, but general anesthesia is weak. However, using nitrous oxide as an anesthetic is only suitable for minor operations such as tooth extraction and surgical suture.
3. Carbon dioxide ：medically carbon dioxide is used to inflate the abdominal cavity and colon for laparoscopy and fibrocolon examinations. In addition, it can also be used to grow bacteria in the laboratory. High-pressure carbon dioxide can also be used for cryotherapy, which is used to treat cataracts, vascular diseases, etc.
4. Argon gas：mainly used for surgical instruments such as high-frequency argon knives in medical treatment.
5. Helium ： used for medical equipment such as high-frequency helium knives.
6. Nitrogen ： Nitrogen is mainly used to drive medical equipment and tools; liquid nitrogen is often used for cryotherapy in surgery, gynecology, and stomatology.
7. Compressed air：mainly used to transmit power for dental instruments, orthopedic instruments, ventilators, etc.
8. Xenon ：Xenon is mainly used in gas tube CT machines in medical treatment.
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