Sleeping with the Gasman

Who or what is an anaesthetist? That strange individual who attends a patient on the morning of major surgery and says, “Hello, it was you I was looking for.”
Is that person a technician? Is that person a doctor?
As the patient, you are about to put your life entirely in their hands. As a patient would you not like to know more about this shady character, the gasman or the gasoose?
Sleeping with the Gasman is written as a story by an anaesthetist. It is based on personal experiences, observations, stories and anecdotes.
Ultimately, the patient and the gasoose are both human, or are they?