Types of Medical Gases Used in Hospitals

A medical gas is a gas or a mixture of gases used for treatment, diagnosis, anesthesia, or surgical procedures. They are considered medicinal products as they are administered directly to the patient. As a result, they are highly controlled and must meet strict purity and safety standards, packaging and labeling requirements, and have the appropriate regulatory approval confirming their safety and efficacy.

This article will explore the different types of medical gases, how they are used, and why they matter.

Oxygen is the most extensively used medical gas across healthcare settings. Its uses include emergency care, respiratory support, resuscitation, anesthesia support, and life support. Its importance in life-saving interventions makes it a key medical gas in ICUs, operating theatres, and ambulances. Oxygen is often stored in cylinders connected to a manifold or in liquid bulk containers. Oxygen pipelines and connection fittings are unique and color-coded so as to prevent a potentially fatal accident if cross-connection (where different gas pipelines are inadvertently swapped) were to occur.

Medical air is a precisely controlled mixture of oxygen, nitrogen, argon, and traces of other gases, at the proportions found in normal air. Before use, it is cleaned and certified to be free of contaminants, particulates, oil, and moisture, according to relevant standards. Medical air is commonly used in operating rooms and ICUs to drive mechanical ventilators and in combination with oxygen for nebulizers. Compressors are commonly used for the on-site generation of medical gas.

At BeaconMedaes, we offer multiple medical air systems, including modular and all-in-one systems. 

Nitrous oxide, also known as laughing gas, is commonly used for anesthesia and analgesia (pain relief). It may be delivered on its own or in a 50:50 mix of oxygen. At high concentrations, it is used as an adjuvant to anesthesia or (more rarely) to induce anesthesia itself. As the nitrous oxide/oxygen mixture, it is used for analgesia and conscious sedation. Nitrous oxide is therefore commonly found in maternity units, burn units, environments where orthopedic casting or plaster practice is carried out, dental surgeries, pediatric units, and occasionally A&E.

Carbon dioxide is used less frequently than many other medical gases, but it is essential in specific cases. It is primarily used for insufflation, where the body cavity is inflated to provide greater visibility and space for surgeons carrying out procedures such as laparoscopies, arthroscopies, and endoscopies. Carbon dioxide may also be used in cryotherapy, where targeted cells or tissue are destroyed, or in combination with oxygen during and after anesthesia.

Nitrogen is classified as a medical support gas, as opposed to a therapeutic gas. It is used to power surgical tools, such as pneumatic drills, tourniquets, and high-pressure equipment. It provides several advantages over medical air, including its inert nature – with zero combustion risk, even in theatre environments with high oxygen.

Heliox, a combination of helium and oxygen, is used for some obstructive respiratory conditions to reduce airway resistance and improve patient breathing through narrowed airways.

Anesthetic gases are used during surgery to cause unconsciousness, analgesia, and amnesia through depression of the central nervous system. Examples include isoflurane and sevoflurane.

As outlined above, each medical gas has a specific clinical purpose, and each fulfils widely different roles in healthcare facilities. Using the correct gas in the correct situation is essential to ensure patient safety and treatment effectiveness. The importance of this necessitates careful management of gas storage, identification at all points along the pipeline and at the terminal unit, strict usage protocols, and extensive training procedures.