An anaesthetic machine (British English) or anesthesia machine (American English; see spelling differences) is a medical device used to generate and mix a fresh gas flow of medical gases and inhalational anaesthetic agents for the purpose of inducing and maintaining anaesthesia.

A breathing system or breathing circuit is a medical device used to deliver oxygen, remove carbon dioxide, and deliver inhalational anaesthetic agents to a patient.

Anaesthetic facemasks are among the most commonly used airway devices.

An oxygen mask provides a method to transfer breathing oxygen gas from a storage tank to the lungs.

The nasal cannula (NC) is a device used to deliver supplemental oxygen or increased airflow to a patient or person in need of respiratory help.

An anesthetic vaporizer is a device generally attached to an anesthetic machine which delivers a given concentration of a volatile anesthetic agent.

The epidural needle is left in place for only a minute or two—just long enough to insert a skinny, flexible catheter the size of a pencil lead into the woman