Yes, for most people, general anesthesia feels like nothing happened and the procedure is over in the time it takes to blink, with no awareness or memory of the surgery itself, though post-anesthesia effects like grogginess are common. It's described as a brief, unconscious transition, more like a reversible coma than sleep, where you lose consciousness, pain sensation, and memory.
Put simply, anesthesia is a medication that helps prevent pain during a procedure. It can make you feel relaxed, drowsy or even completely unconscious, depending on the type used.
The effect of anesthesia on brain activity parallels some of the features of sleep (3). However, there are obvious differences. For example, a common patient response on emerging from anesthesia is disorientation and the feeling that time has not passed.
You'll feel as though you're asleep. But general anesthesia does more than put you to sleep. You don't feel pain when you're under general anesthesia. This is because your brain doesn't respond to pain signals or reflexes.
General anesthesia looks more like a coma—a reversible coma.” You lose awareness and the ability to feel pain, form memories and move. Once you've become unconscious, the anesthesiologist uses monitors and medications to keep you that way.
General anesthesia can paralyze your bladder muscles, making it hard to urinate and affecting your ability to recognize the need. Many surgeries use a Foley catheter, a tube that drains urine from the bladder.
While undergoing surgery that can last from 6 to 12 hours is considered safe, cosmetic surgeons rarely keep their patients under general anesthesia any longer than 5 hours. Most complex surgeries do not require any more than 3 to 4 hours of anesthesia.
But there are tools that help your provider measure electrical activity in your brain during surgery. This helps them estimate your level of consciousness. First, your provider will take an electroencephalogram (EEG). For this test, they'll place small sensors on your scalp.
The American Society of Anesthesiologists (ASA) formally established evidence-based NPO guidelines in 1998, and virtually all anesthesia societies today have adopted some modest variation of the ASA's “2-4-6-8 rule.” Healthy patients are permitted clear (nonparticulate) liquids up to 2 hours prior to surgery, breast ...
You'll fall asleep (become unconscious) within about a minute and will not be aware of anything until you wake up after the procedure. During the procedure an anaesthetist will stay with you all the time. They will: monitor your heart rate, blood pressure and oxygen levels.
Anesthesia suppresses REM sleep, and may interfere with the body's ability to restore itself. After surgery, some people experience REM rebound, a sudden increase in REM sleep that can cause vivid dreams, restlessness, or confusion.
The muscles of the body are paralyzed during general anesthesia, including the muscles that help the lungs draw breaths, which means the lungs are unable to function on their own. For this reason, you'll be hooked up to a ventilator that will take over the job of inhaling for your lungs.
Anesthetic drugs block the brain's ability to send information between regions. Many of the commonly used anesthetics bind to GABA receptors, a type of receptor found in inhibitory interneurons all over the nervous system.
You may feel hazy or groggy as you come round from the general anaesthetic. A nurse may give you oxygen (through tubes in your nose or a mask) to help you feel better. It's common to feel sick or vomit after you've been given general anaesthesia. Your nurse may offer you medicine to help with sickness.
Things NOT TO DO before surgery: Do not eat anything after midnight before surgery (including candy, mints and cough drops) unless otherwise instructed by your surgeon or anesthesiologist. Do not drink anything other than water after midnight before surgery. You may have plain water until 5 am before surgery.
In general, anesthesia is considered safe, and most people can undergo multiple procedures with anesthesia without any long-term adverse effects. However, each time you undergo anesthesia, there is a small risk of side effects or complications such as nausea, vomiting, sore throat, headache, or confusion.
The anaesthetist then injects the induction drug through the cannula into your vein. This is the time when he or she may ask you to count (often backwards, from 100). Counting is a means of distracting you and also shows when the drug has achieved its effect.
With the exception of neuromuscular antagonists, lean body weight is the optimal dosing scalar for most drugs used in anaesthesia including opioids and anaesthetic induction agents.
Patients do not talk during the anaesthetic while they are unconscious, but it is not uncommon for them to do so during emergence from anaesthesia.
Since the operating room table is narrow a safety strap will be placed across your lower abdomen, thighs or legs. Your arms will be placed and secured on padded arm boards to prevent them from falling off the table.
Tips for Overcoming the Fear of Anesthesia
One of the biggest concerns is that being overweight makes you more likely to have a condition called sleep apnea, which causes you to temporarily stop breathing while you sleep. This can make anesthesia riskier, especially general anesthesia, which causes you to lose consciousness.
Anesthesiologists often tell patients they're going to put them to sleep for their surgery. But general anesthesia is not sleep. It's a drug-induced, reversible coma that bears a remarkable physiological resemblance to death, as Emery Brown describes it.
In general, patients start to wake up from anesthesia within a few minutes after the procedure is completed. Full recovery takes from minutes to hours. While waking up from anesthesia, patients may experience side effects such as nausea, dizziness, and confusion. These side effects are usually temporary.