Outpatient Surgery Instructions, Types of Anesthesia, Risks, and Complications

  • Medical Author: Lynnus Peng, MD
  • Medical Editor: Anthony Anker, MD, FAAEM

What is Outpatient Surgery?

  • Outpatient surgery allows a person to return home on the same day that a surgical procedure is performed.
  • Outpatient surgery is also referred to as ambulatory surgery or same-day surgery.
  • Outpatient surgery eliminates inpatient hospital admission, reduces the amount of medication prescribed, and uses a doctor's time more efficiently. More procedures are now being performed in a surgeon's office, termed office-based surgery, rather than in an operating room.
  • Outpatient surgery is suited best for healthy people undergoing minor or intermediate procedures (limited urologic, ophthalmologic, or ear, nose, and throat procedures and procedures involving the extremities). Recently, people with more complex medical problems are undergoing outpatient surgery, and the types and complexity of surgical procedures have expanded significantly.
  • More than half of elective surgery procedures in the United States are currently performed as outpatient surgeries. Health experts expect this amount will increase over the next decade.
  • Outpatient surgery has developed over the past 3 decades for a number of reasons, including:
    • Improved surgical instruments
    • Less invasive surgical techniques
    • A team approach in preparing a person for surgery and home recovery that involves both a surgeon and an anesthesiologist (a medical doctor who specializes in administering anesthesia medications so the patient feels minimal to no pain and does not remember the surgery)
    • The desire to reduce health care costs

What Is an Anesthesiologist and What Do They Do?

  • Anesthesiologists are doctors who administer and closely monitor drugs that provide pain reilef for less invasive procedures like endoscopy or during labor and delivery and also adminitster drugs that make you completely sedated during surgery, and after surgery, you will be taken to the recovery room, where you are closley monitored by healthcare professionals.
  • Anesthesiologists machines that continually display vital signs such as blood pressure, blood oxygen levels, heart function, and breathing patterns so that they can watch for any breathing problems.
  • Anesthesiologists may advise you and your doctors on how to manage pain.
  • The anesthesiologist will tell you what to expect during your surgery.
  • Because anesthesia and surgery affect every system in the body, the anesthesiologist will conduct a preoperative interview. Sometimes this is done in person; in other cases, the anesthesiologist will interview you over the phone and will ask questions, usually, the evening before surgery. He or she will review your medical history, current medical diseases or conditions you have, and check to assure you don't have any open wounds that could lead to a serious infection
  • If you do not speak with your anesthesiologist before your surgery,  he or shey will see you right before surgery to review your entire medical history as well as results of any medical tests previously conducted. By this time, he or she will have a clear understanding of your anesthet

What Types of Anesthesia Are Used During Outpatient Surgery?

When a person has outpatient surgery for an injury, condition, or other medical disease anesthesia, which is a drug that blocks the nerves in the pain center during the procedure. Four types of anesthesia used in outpatient surgery.

  1. General anesthesia. 
  2. Local anesthesia
  3. Regional anesthesia
  4. Monitored anesthesia care (IV) sedation.

What Is Local Anesthesia?

Doctors use local anesthetics to block pain in a part of the body that they are operating on. Often, local anesthetics are used for:

  • Eye surgeries (cataract removal).
  • Removing small skin growths such as
  • Warts
  • Small skin growths and tags.
  • Removing some types of cancer
  • Taking skin biopsies
  • Fixing broken bones.
  • Stiching a cut.
  • Surgical dentistry.

With local anesthesia the patient is concious and comfortable during the operation. Normally, patients can go home soon after surgery.

What Is Regional Anesthesia?

  • Regional anesthesia also blocks pain in areas of the the body being operated on like local anesthesia, only with regional anesthesia, it is for surgery on larger parts of the body. It normally is given through an injection or a thin tube called a catheter, often in the spine.
  • Regional anesthesia is used for surgery of the abdomen, orthopedics, to decrease pain during childbirth, and for cescearean deliver (C-section birth).
  • You usually can go home sometime after the anesthesia has worn off.

What Is General Anesthesia?

  • General anesthesia affects the whole body, making the patient unconscious and unable to move. Surgeons use general anesthesia it when they perform surgery on internal organs and for other invasive or time-consuming procedures such as back surgery. 
  • General anesthetics are typically very safe. However, they can increase the risks for some patients, for example, the elderly or people with chronic illnesses such as diabetes
  • Side effects from the anesthesia may linger for several days in some people, particularly children and the elderly.
  • Dangerously low blood pressure (hypertension) - are much less common than they once were. There are risks for any surgery or other medical procedure, some risks exist. 
  • Specialized doctors called anesthesiologists carefully monitor unconscious patients and can adjust the amount of anesthesia they receive to minimize these risks.

What Is Monitored Anesthesia Care (IV Sedation)?

  • Monitored anesthesia care or (IV) is a type of secation that makes you feel relaxed or sleepy. 
  • Monitored anesthesia care normally is used for minimally invasive procedure or surgery, and is used for colonscopies, endoscopies, and craniotomies, and minor procedures for heart disease.
  • In monitored anesthesia, a syringe is inserted into a vein on the wrist or hand. Next, a healthcare professional will sedate you through an IV, which relaxes you, and makes you feel groggy or sleepy.
  • There are several levels of sedation, and people react differently to them. 
    • Some people are awake and can talk but feel no pain. 
    • Other people  fall into a deep sleep and remember nothing of the procedure or surgery. 
  • Sometimes, IV sedation is combined with local anesthetic.
  • Side effects and complications can occur during monitored anesthesia care. As your doctor or Anesthesiologist if you have questions.

What Are Preoperative Instructions for Outpatient Surgery?

Before the surgery

  • A surgeon evaluates the person before the operation. If a surgeon finds medical issues that need attention, a family doctor or an internist also sees the person before the operation.
  • Although most people do not meet with their anesthesiologist until the day of surgery, this doctor plays an active and important role in assessing and preparing people with complex medical conditions for surgery. Either before or on the day of surgery, an anesthesiologist reviews available medical information, completes an examination, and discusses the anesthetic plan with the person who is undergoing the operation and his or her family. The anesthesiologist can answer any questions or concerns at this time.
  • People with medical problems, such as prior heart attacks or strokes, high blood pressure, diabetes, asthma, or chronic obstructive pulmonary disease, should visit with their doctor or anesthesiologist before the day of their surgery. At this visit, the doctor may also require the following information:
    • Copies of medical records, especially ECGs and results of heart and lung testing and recent lab tests
    • A list of medical problems and past surgical procedures, including any problems that occurred during prior surgeries
    • A complete list of medications (both prescription and over-the-counter), including vitamins, herbs, or other supplements, and their dosages
    • A clearly identified list of medications that cause allergic reactions or other problems
  • The evaluation before surgery seeks to address questions, to help calm fears and anxiety regarding anesthesia and surgery, and to ensure that a person understands his or her existing medical problems. This evaluation also confirms that the person is in the best condition prior to surgery.
  • Sometimes, medication changes or additions are recommended or more testing is required before surgery. Rarely, an anesthesiologist may delay or cancel the surgery for further evaluation.

Before arrival at the surgery center

  • Do not eat or drink before the procedure. Otherwise, vomiting may occur under anesthesia, causing aspiration pneumonia (when stomach contents gets into your lungs) or breathing problems. A surgeon or an anesthesiologist should give specific information about when to stop eating and drinking.
  • Specific instructions may be given to continue certain medications, such as heart medications, or to discontinue certain medications, such as aspirin or blood thinners, several days before the procedure. These recommendations should be followed carefully. A mistake could delay or cancel the surgery.
  • Do not wear jewelry because it may get lost or cause skin irritation if it becomes too tight.
  • Do not wear makeup because it tends to smear or cause tape not to stick.
  • Do not wear contact lenses because they may get lost, dry out, or scratch the eyes.
  • Remove dentures before the procedure.

What Happens When You Get to the Outpatient Surgery Center?

  • Most outpatient centers ask that the individual undergoing surgery arrives 1-2 hours before surgery to allow time for the following: checking in, placing the IV, and administering antibiotics or other medications. These activities usually occur in a preoperative waiting area, where the anesthesiologist and possibly nurse anesthetists (nurses trained to participate in anesthesia care) may be present.
  • The individual is then escorted from the preoperative area to the operating room, which is usually chilly. The operating table (or bed) is well padded, but it is not nearly as comfortable as a bed at home.
  • Anesthesia monitors are placed at this time, including heart monitors on the chest, a blood pressure cuff on the arm to monitor blood pressure, and a soft rubber clip on the finger to monitor oxygen level. Extra oxygen is given by face mask or nasal tube while the individual is in the operating room.
  • The anesthesiologist begins sedating the individual and perhaps starts an additional IV line. Depending on the procedure, the individual may be given general anesthesia, local anesthesia, regional anesthesia, or spinal or epidural anesthesia.
    • General anesthesia, given through an IV or as inhaled as gas allows the individual to be completely unconscious during the surgery.
    • With local anesthesia, doctors inject local anesthetics (numbing medication) directly around the operative area.
    • With regional anesthesia, doctors place local anesthetics (numbing medication) and other medications directly around the nerves that supply sensation to a particular area of the body. Regional anesthesia is similar to a numbing injection the dentist uses to numb a tooth for drilling and fillings. The anesthetic block may be placed in the shoulder, arm, leg, or back. Regional anesthesia requires some cooperation on the part of the individual and may not be suitable for small children.
    • Most people receiving regional or local anesthesia also receive additional medications for sedation during the procedure. Some procedures can be done with just sedation.
    • Spinal or epidural anesthesia is the injection of a local anesthetic into or around the spinal column to numb the skin. Before the anesthesiologist injects the anesthetic, the person is asked to sit up and lean forward over a pillow or to lie on his or her side in a curled-up position. The person’s back is also cleaned. With spinal anesthesia, which acts more rapidly, the anesthetic is placed into the fluid that surrounds the spinal cord. Epidural anesthesia involves placing a small catheter in the area outside of the spinal cord sac. Anesthetics used for spinal or epidural anesthesia initially cause a feeling of warmth, followed by a complete loss of sensation in the lower body.

What Happens During the Surgery as an Outpatient?

For the procedure, the individual is positioned on his or her side, stomach, or back.

Throughout the surgery, the anesthesia team closely monitors the individual to ensure his or her safety and comfort. Medication is given to the person not only to provide anesthesia but also to control the heart rate and blood pressure.

Commonly used medications include the following:

  • Midazolam (Versed) - A benzodiazepine that helps decrease anxiety and cause amnesia
  • Fentanyl (Duragesic, Transdermal, Sublimaze Injection), Morphine, Hydromorphone - Narcotics that lower the pain of surgery and decrease anxiety
  • Propofol (Diprivan) - A hypnotic that can be used to induce anesthesia or to maintain sedation
  • Volatile agents (gases) - The inhaled medication that keeps a person from feeling anything

What Happens After Outpatient Surgery?

With the completion of surgery, the anesthesia team brings the individual to a recovery room where he or she continues to awaken fully from the sedation. Recovery can take from 1 hour to several hours.

Ideally, the individual wakes up with minimal to no pain or discomfort. If significant pain is experienced, a nurse should be informed immediately. The recovery nurse monitors and treats the individual if other problems arise, such as nausea, vomiting, chills, and low or high blood pressure. An anesthesiologist is also available to assist in the recovery room.

When Can You Go Home After Outpatient Surgery?

All outpatient centers have strict discharge criteria. The individual must meet the following criteria before being released:

  • Have stable vital signs (heart rate, blood pressure, breathing rate, temperature, and pain level)
  • Tolerate food and drink (Tolerating food and drink is important because oral medications may need to be taken to relieve pain or to prevent infection.)
  • Be able to empty bladder
  • Walk unassisted

A responsible adult must be present at the time of discharge to assist the individual in going home. In addition, this adult should be with the individual at all times for the first 24 hours to provide help when necessary and to call for help should a problem arise.

  • Before going home, the person should have written instructions on the following:
    • Whom to contact in the hospital if a problem or complication occurs
    • What medication to take for pain
    • Activity level, and when a return to work is possible
    • When to start eating
    • Where to go if evaluation or admission to a hospital is necessary

What If a Child Needs Outpatient Surgery?

For parents or caregivers, surgery performed on their children is much more stressful than if they were having surgery performed on themselves. In these instances, speaking to the anesthesiologist regarding the anesthetic plan is even more important. Children benefit significantly from surgery in the outpatient setting because it decreases separation from their family and the home.

  • A parent or other responsible adult must accompany all children.
  • Many surgery centers sedate a child in the waiting room to help with anxiety.
  • A parent may be invited into the operating room with the child for the first part of anesthesia to comfort the child in this strange environment. If a parent is unable to do this, someone else might be available to assist if possible. If invited into the operating room, the parent must remain calm to keep from alarming the child.
  • Children often inhale anesthetic gases as they go to sleep. Every child is different. Some go to sleep quietly, and others cry and try to fight the anesthesia.
  • Once the child is asleep, doctors insert an IV and begin the surgical procedure.
  • The adult is reunited with the child early in the recovery period to provide comfort and added security—for both of them. Children must also meet discharge criteria before they can be sent home.

What Are the Side Effects and Complications of Outpatient Surgery?

Outpatient surgery is very safe, with a low frequency of complications. However, potential risks and complications are associated with any surgical procedure, no matter how minor. Some risks are related to the surgery, and other risks are related to the anesthesia. The most frequent complications include nausea and vomiting, sore throat, and discomfort at the surgical site.

Although more serious complications are rare, heart attack, stroke, excessive bleeding, and even death have occurred in the outpatient setting. Some people may require hospital admission following surgery. The doctor should be alerted as soon as possible if a problem is suspected after a person is discharged from the outpatient center. The earlier the doctor is aware of a potential problem, the sooner appropriate treatment can be started to avert any long-term effects.

Health Solutions From Our Sponsors

8 Symptoms of Lung Cancer

A person with lung cancer may not have any symptoms when the cancer is diagnosed. When signs and symptoms do occur, they may include:

  1. Cough
  2. Coughing up blood
  3. Chest pain
  4. Shortness of breath
  5. Unexplained weight loss
1. Bready L, Mullins R. Decision Making in Anesthesiology. Vol 3. Mosby-Year Book; 1999.
2. Miller RD, Reves JG, Miller ED Jr, Cucchiara R. Anesthesia. 5th ed. Churchill-Livingstone; 2000.
3. Stoelting RD, Dierdorf SF. Anesthesia and Co-existing Disease. 3rd ed. Churchill-Livingstone; 1993.
4. Stoelting RD, Miller RD. Basics of Anesthesia. 3rd ed. Churchill-Livingstone; 1994.
5. Stoelting RK. Pharmacology and Physiology in Anesthetic Practice. 3rd ed. Lippincott Williams & Wilkins; 1999.
6. Anesthesia. NIH. Updated:
7. Anesthesia. Johns Hopkins Medicine.