One of the most important pieces of equipment in any operating theater is the anesthesia machine. These medical devices are critical for controlling and mixing the gases and anesthetic agents that keep patients unconscious during surgery. 

While they may not be as ubiquitous as a surgeon’s scalpel, understanding anesthesia machines, their components, and the doctors who use them is critical for an effective surgery team. 

A Brief History of Anesthesia

Historically, anesthesia and managing the patient have been some of the most difficult parts of surgery. Keeping a patient sedated is critical to prevent them from going into shock during the surgery or reflexively struggling as doctors operate, but safely inducing and maintaining a state of unconsciousness comes with its own set of hazards. Too much anesthetic can cause permanent damage or even threaten the patient’s life, while too little will cause the patient to wake up mid-surgery. 

In the past, surgeons relied on crude methods like medicinal herbs or alcohol to knock out patients or at least numb them to the pain. In 1917, Dr Henry Boyle developed a continuous air-flow machine that could safely and accurately deliver a mix of oxygen, nitrous oxide, and ether to the patient. Modern anesthesia machines continue to follow this design philosophy.

The Role of Anesthesia Machines

In the surgery theater, anesthesia machines have three basic functions. 

  1. Provide oxygen to patients while they’re unconscious. In addition to anesthetic agents, anesthesia machines provide a regular oxygen flow to keep patients breathing during surgery. 
  2. Mix anesthetic gases into the oxygen to keep the patient unconscious. These gases must also be mixed accurately to prevent the patient from receiving too much or too little. This requires precise control mechanisms for regulating gas flow and close attention paid to the patient’s vital signs.
  3. Enable ventilation for the patient receiving anesthesia. In other words, this means pulling CO2 away from the patient’s mouth and nose, which could otherwise suffocate them.

Anesthesia Machine Components

While the exact layout of an anesthesia machine will differ depending on the manufacturer, all continuous air-flow anesthesia machines feature the same essential components, such as:

  • Vaporizers that add precise amounts of anesthetic agents to the fresh gas flow. These vaporizers allow anesthesiologists to control the gas flow and concentration and, in turn, how much anesthetic a patient receives. This used to be done via buttons, switches, and valves, but modern anesthesia machines are now controlled via more responsive and flexible digital interfaces on healthcare computers. 
  • Flowmeters that control the amount of oxygen, nitrous oxide, and air that a patient receives. These flowmeters plug into the hospital’s gas system and ensure the patient gets a reliable supply of breathing air.
  • Ventilators that help maintain normal respiratory rates and blood chemistry in the patient. Modern ventilators can use different modes or levels of ventilation, which is critical for working with a broader range of patients in a wider range of health conditions (older vs. younger, lighter vs. heavier, healthier vs. sicker, etc.). 
  • Breathing circuits that deliver the oxygen and anesthetic gases to patients and eliminate CO2 that they exhale. This allows the anesthesia machine to reuse exhaled anesthesia gases and conserve respiratory heat and humidity, an important parameter for the patient’s health during an operation. 
  • Scavenging systems that collect and remove expelled anesthetic gases from the operating room. These systems can be active (such as suction applied to remove gases) or passive (relying on heavier-than-air anesthesia gases and pressure to remove waste gases). 

Anesthesia Machine-Compatible Computers from Cybernet

Anesthesia machines are more than just another tool in the OR; they’re a critical component of ensuring the health and safety of patients, which makes understanding their function and how to support them absolutely critical as well.

If your healthcare group needs medical-grade tablets and computers compatible with its anesthesia machines, contact the team at Cybernet Manufacturing. Our devices feature a full range of hardware and software considerations that let them interface with both modern and legacy devices, ensuring compatibility. 

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