In the collection Inside the job
What does an anesthesiologist actually do during surgery?
Anesthesiologists give the drugs that block pain, and they also monitor and manage the patient's vital functions and medical conditions for the whole operation.
AI-drafted from web search results, then checked by a second, independent AI that read 5 of its 6 cited pages in full and found the thread supported. No person has reviewed it.

The short answer
An anesthesiologist is a physician who keeps a patient comfortable and safe during an operation. Giving the anesthetic is only part of the work. They also watch the patient's vital signs continuously, treat changes as they happen, and manage any other medical conditions the patient has. UCLA's medical school says that inducing anesthesia is only one facet of their perioperative responsibilities. [1] [2]
Giving and adjusting anesthesia
Before the operation, the anesthesiologist reviews the patient's health history and test results and chooses the safest anesthesia plan. In the operating room they administer drugs for sedation and pain management and adjust the dosing as needed. The Colorado Society of Anesthesiologists says the anesthesiologist regulates the anesthetic so the patient stays comfortable until the anesthetic care is complete. Oxford University Hospitals adds that the anesthetic is tailored to the individual patient and that the anaesthetist stays with them throughout the operation. [3] [1] [2] [4] [5]
Monitoring and managing the body
Surgery affects the body's basic functions, so much of the job is close observation. Johns Hopkins says the anesthesia provider watches for the slightest changes in heart rate and rhythm, blood pressure, body temperature, oxygen levels and breathing. Cleveland Clinic adds that they give fluids, blood products and medications to support the heart, lungs and kidneys. Oxford describes the range as running from simple monitoring of heart, blood pressure and oxygen levels to advanced organ support in complex cases. Cleveland Clinic also notes that they make sure body parts are padded and protected from injury while the patient is unaware. [6] [3] [5]
Handling problems and existing conditions
Patients often have conditions such as diabetes, asthma, high blood pressure or heart problems. Because of the preoperative evaluation, the anesthesiologist is prepared to treat these during and right after surgery. They are also the doctors who diagnose and treat any medical problem that arises during the operation. A UCLA anesthesiologist, Dr. Lee, describes the role as scanning for potential issues and alerting the team, and says they always keep a plan A, a plan B and a plan C for emergencies. [4] [6] [2]
Teams and aftercare
An anesthesiologist may work alone or with an anesthesia care team that includes nurse anesthetists or physicians in training. Johns Hopkins notes that either an anesthesiologist or a certified nurse anesthetist may give the anesthesia. After the operation, the anesthesiologist stays responsible for the patient in the recovery area, usually decides when the effects have worn off enough for the patient to leave it, and helps plan pain relief. [3] [6] [4] [5]
Sources
- What Is An Anesthesiologist? - UW Anesthesiology & Pain ... (anesthesiology.uw.edu) Found by source search. Not checked by a person.
- What Is an Anesthesiologist? | UCLA Medical School (medschool.ucla.edu) Found by source search. Not checked by a person.
- Anesthesiologist: What They Do, Specialties & Training (my.clevelandclinic.org) Found by source search. Not checked by a person.
- Know Your Anesthesiologist - The Colorado Society of Anesthesiologists (csa-online.org) Found by source search. Not checked by a person.
- What is an anaesthetist? - Oxford University Hospitals (ouh.nhs.uk) Found by source search. Not checked by a person.
- Anesthesia | Johns Hopkins Medicine (hopkinsmedicine.org) Found by source search. Not checked by a person.
Questions to follow next
- What is the difference between an anesthesiologist and a nurse anesthetist?
- What are the different types of anesthesia?
- How long does it take to train as an anesthesiologist?