At Yale Medicine, anesthesiologists caring for patients who want deep sedation for their colonoscopy typically use a drug called
Deep sedation.
You won't be completely unconscious, but you'll sleep through the procedure and probably have no memory of it. The medication commonly used for deep sedation is propofol, which is not an opioid. It acts fast, wears off quickly, and is safe for most patients.
The entire procedure usually takes 20-30 minutes. Thanks to the sedatives you were given, you'll likely sleep through the whole thing. Most patients don't remember anything from the actual procedure. If any abnormalities were noted during the colonoscopy, your doctor will discuss these with you after the procedure.
The colonoscopy usually lasts around 30 minutes or less and is typically performed while you are under a general anaesthetic.
Anesthesia is an important part of the colonoscopy procedure, ensuring that the patient is comfortable and safe. There are two main types of anesthesia used for colonoscopy: conscious sedation and general anesthesia. Conscious sedation is the most common type of anesthesia used for colonoscopy.
AS The sedative agents that are currently available for colonoscopy include midazolam, propofol, diazepam, diphenhydramine, promethazine, meperidine, and fentanyl. Among these, midazolam and propofol are the most commonly used sedatives, whereas fentanyl is the most frequently administered analgesic.
Thinner and more flexible endoscopes may cause less stretching of the mesentery, which is one of the principal sources of pain during colonoscopy.
The colonoscopy lasts for between 25 to 45 minutes. Most people have a mild anaesthetic or sedation to minimise any pain or discomfort. The sedation also means you may remember very little of the procedure or nothing at all.
On the day of the procedure, you will likely be given an anaesthetic so you don't feel any pain or discomfort. As you may feel drowsy or weak prior to and after the colonoscopy it is best to arrange someone to drop you off at the hospital before the procedure and take you home afterwards.
Unlike many other countries, all patients (except for rare circumstances) undergoing colonoscopy in Australia should be given sedation to make them very comfortable during the examination.
Propofol works quickly; most patients are unconscious within five minutes. "When the procedure is over and we stop the intravenous drip, it generally takes only 10 to 15 minutes before he or she is fairly wide awake again.”
After a colonoscopy, you will need to recover from the effects of the sedation, which usually wear off within 30 minutes, and you may need to rest after your colonoscopy preparations. You may experience some discomfort and mild pain in the abdominal area as air is relieved from the procedure and leaves your colon.
Due to the sedation, it is unlikely the patient will remember the colonoscopy itself. Once the procedure is over, the patient will need about 30-60 minutes to recover from the sedation before getting dressed and leaving the building.
The process of waking up from anesthesia is known as emergence. During emergence, the anesthesiologist will slowly reduce the amount of anesthetic drugs in the body. This helps to reduce the intensity of the effects of anesthesia and allows the patient to regain consciousness.
Sedation
A nurse will administer a sedative through an IV to numb your body, so you feel no pain. You will feel sleepy during this procedure, but you will not completely fall asleep. It is sedation, not anesthesia. Still, it means your colonoscopy is not painful.
Your body is completely covered during the exam.
You may be wondering how much of your body is exposed during a colonoscopy. But don't worry about being embarrassed or exposed — you will wear a hospital gown, and a sheet provides extra covering.
The biggest culprits that will show up in a colonoscopy and obscure our view are foods like nuts, seeds and high-fiber cereals. You also want to avoid granola, coconut, dried fruit and fresh fruit with the skin on, like apples and pears, or fruit with seeds, like strawberries and raspberries.
As a general rule, it is best to take the rest of the day off from work after a colonoscopy and give yourself 24 hours to feel 100% normal again.
The mechanism of pain during colonoscopy is similar to that of childbirth. Both are caused by the spasm of smooth muscle. But the pain during colonoscopy is artificially caused by the insertion of endoscope.
Mild abdominal pain/discomfort immediately after a colonoscopy is not rare, occurring anywhere between 2.5% to 11% of the cases [2]. Though it may have a host of etiologies, it is most commonly a result of air insufflation, endoscope looping, and/or manual pressure maneuvers used during a colonoscopy.
After the test, you may be bloated or have gas pains. You may need to pass gas. If a biopsy was done or a polyp was removed, you may have streaks of blood in your stool (feces) for a few days. Problems such as heavy rectal bleeding may not occur until several weeks after the test.
When you go in for a colonoscopy, you usually receive some type of anesthesia to help you manage the discomfort. These days, more people are receiving deep sedation with propofol for the colonoscopy, which lets them fall asleep rapidly—and quickly wake up.
Propofol sedation is nothing at all like sleep. Sleep is reversible with external stimulation - if you shake somebody, they wake up.
You may not eat anything the morning of your procedure, but you may continue to drink clear liquids up until 2 hours before your procedure. You may shower and brush your teeth. Will I be shaved before my colonoscopy? You will not be shaved.