What is the importance of medical gases in medical treatment?

Medical gases play a role in medical treatment "Life Support System" the importance of the core role is reflected in the direct participation in patient treatment, ensuring the operation of medical equipment, maintaining surgical safety and infection control and other dimensions. The following is a systematic analysis:

core Functions and Classification of 1. Medical Gases

medical gases need to meet high purity (≥ 99.5%), sterile oil-free, pressure stability such as strict standards, mainly divided into the following two categories:

the key role of 2. medical gases in medical treatment

1. Life support and first aid support

• oxygen (O₂):
  • first Aid Core in cardiopulmonary resuscitation (CPR), shock, severe trauma and other scenarios, high-flow oxygen (such as 10-15L/min) can quickly increase blood oxygen saturation and prevent organ hypoxia damage.
  • Chronic Disease Management: For patients with chronic obstructive pulmonary disease (COPD), long-term low-flow oxygen inhalation (1-2L/min) can prolong survival and improve quality of life.
  • Data support according to WHO statistics, about 6 million patients with severe hypoxia rely on medical oxygen treatment every year, 90% of which are concentrated in low-and middle-income countries.
• Nitrous oxide (N₂ O, laughing gas):
  • anesthesia Analgesia: Mixed with oxygen (e.g. 50% N₂ O + 50% O₂), it can quickly induce anesthesia and reduce the dosage of general anesthetics, which is suitable for labor analgesia, dental surgery, etc.
  • Advantage fast onset (30-60 seconds), fast recovery (5-10 minutes), few side effects (nausea and vomiting rate <5%).

2. Surgical safety and precise operation

• compressed air (Air):
  • power drive: Driving pneumatic surgical tools (such as bone drills and pneumatic saws), their pressure stability (usually 0.4-0.7MPa) directly affects the accuracy of surgery.
  • Cleaning function: Used for endoscope cleaning, high-pressure air (≥ 0.6MPa) can quickly blow-dry the lens to avoid water stains interfering with the field of view.
• Carbon Dioxide (CO₂):
  • laparoscopic pneumoperitoneum: The operating space is established by filling CO₂ (pressure 12-15mmHg), and its high solubility (1:0.8) can reduce the risk of gas embolism.
  • Advantage: Non-flammable, low cost (only 1/10 of argon), is the standard choice for laparoscopic surgery.
• Nitrogen (N₂):
  • equipment protection: Used to drive liquid nitrogen cryotherapy instrument to treat skin lesions (such as warts and moles), the temperature can reach -196 ℃, and the lesion tissue can be accurately destroyed.
  • Storage and transportation: As a protective gas filled in the drug packaging to prevent oxidation deterioration (such as some antibiotics need nitrogen storage).

3. Infection Control and Medical Safety

• gas purity requirements:
  • medical gas is required to pass three-stage filtration system(coarse filtration & rarr; fine filtration & rarr; activated carbon filtration) to ensure particulate matter ≤ 0.3 μm and oil content ≤ 0.01 mg/m & sup3; to prevent microbial contamination.
  • Case in 2017, 3 patients suffered from lung infection due to oil pollution in oxygen pipeline of a hospital, highlighting the importance of gas purity.
• Piping System Design:
  • zoned supply the gas pipelines of operating room, ICU and general ward are set up independently to avoid cross contamination.
  • Terminal identification: Use different colors to identify the gas type (e. g. oxygen is green, nitrogen is black) to prevent misconnection accidents.

Management Challenges and Solutions for 3. Medical Gas Systems

1. Supply stability risk

• risk: Gas cylinder shortage, pipeline leakage and equipment failure may lead to gas interruption during operation and endanger the life of patients.
• Solution:
  • two-way supply: Configure the main gas source (such as liquid oxygen storage tank + steel cylinder group) to ensure continuous gas supply.
  • intelligent monitoring: Install pressure sensors and flow meters to monitor gas parameters in real time, and automatically alarm when abnormal (such as pressure <0.3MPa trigger alarm).

2. Difficulties in quality control

• risk insufficient gas purity or excessive impurities may cause medical accidents (such as oil pollution causing pulmonary embolism).
• Solution:
  • regular inspection: Entrust a third-party agency to test the quality of the gas every quarter and issue a CMA certification report.
  • Maintenance: Clean the gas filter every six months and replace the desiccant (such as molecular sieve) to prevent performance degradation.

3. Personnel training and emergency management

• risk: Human errors such as misconnection of gas by the operator, failure to drain water in time, resulting in equipment damage, etc.
• Solution:
  • standardized training the Medical Gas Operation Regulations shall be formulated to require medical staff to receive at least 8 hours of practical training per year.
  • Emergency drill: Simulate gas leakage, supply interruption and other scenarios every quarter to improve emergency response capability (e. g. switch backup gas source within 3 minutes).