This type of anesthetic renders you completely unconscious, and your breathing is impaired, so a breathing tube, ventilator, and inhalation anesthetic are used.
Most patients who undergo colonoscopy receive sedation with medications such as midazolam, fentanyl, or propofol. They continue breathing on their own, without needing a breathing tube. Sedation can be safely managed even in the case of an obese patient with sleep apnea.
Most often, either moderate sedation or deep sedation with the anesthetic propofol are used for colonoscopies. An anesthesiologist is sometimes present for moderate sedation — sometimes called conscious sedation by patients, though the term is technically incorrect.
What happens during colonoscopy? Prior to the procedure, an intravenous catheter (IV) will be placed in a vein in your arm. Females of childbearing age may be asked to undergo a pregnancy test. Medicine (sedation) will be injected to help you feel relaxed and sleepy.
For most patients, a sedative is given in intravenous form to help relax and minimize any discomfort during the procedure. But did you know that using a sedative is optional? In many countries, sedation-free colonoscopies are the norm. Patients are alert and engaged during the procedure.
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.”
Your doctor and nurse will be in the room at all times. The procedure usually takes about 20-45 minutes. The amount of time depends on how well your at-home preparation worked, the length of your colon, and how many polyps are found and removed. How comfortable you are also affects how long the procedure takes.
Most colonoscopies take only 15-30 minutes to complete. As a reminder, most patients recall feeling minimal to no pain or discomfort during the procedure. After the colonoscopy is done, you will be observed in a recovery area until the effects of the anesthesia wear off.
Most patients will have no memory of the procedure while under moderate sedation. Deep sedation. This is deeper still, and patients will respond to repeated painful stimulation, but usually non-purposefully. Breathing may be impaired, as may cardiovascular function.
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.
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.
Will I be up all night with colonoscopy prep? Probably not, if you start on time. While everyone's body is different, most people are able to complete their round of purging before going to sleep for the night.
The majority of patients will breath on their own during surgery. The LMA keeps you from snoring or having significant obstruction of your airway passages. In select patients, including very obese patients, an endotracheal tube (ETT) will be inserted instead of an LMA.
Intubation is necessary when your airway is blocked or damaged or you can't breathe spontaneously. Some common conditions that can lead to intubation include: Airway obstruction (something caught in the airway, blocking the flow of air). Cardiac arrest (sudden loss of heart function).
Usually colonoscopy utilizes ambient air to expand and inflate the colon and, as a result, leaves the colon bloated or distended until the gas is either expelled or absorbed.
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.
Regardless, many people are anxious or fearful before a medical procedure, especially if they're worried their doctor may find cancer. The bottom line: it's worth it. If you're at an average risk, you only have to have a colonoscopy once every 5 to 10 years.
You may keep most clothing on for upper endoscopy as well as comfortable shirt and socks for colonoscopy. Women may keep their bra on for the procedure. Please do not wear lotions, oils or perfumes/cologne to the center due to the monitoring devices.
The effects of the sedation could last up to a day, so you should not drive or operate any machinery until the following day. You may feel gassy or bloated for a while after the procedure because of the air that was injected into your intestine during the colonoscopy.
Colonoscopy recovery is usually quick with most people resuming normal activity the next day. Even so, it is important not to rush back to work. It is best to take the remainder of the day to rest, recover from sedation, and replenish fluids and nutrition. The results of your exam should be available within a few days.
Colonoscopies performed in the afternoon (PM) have been shown to have lower adenoma detection rates (ADR) compared to those in the morning (AM). Endoscopist fatigue has been suggested as a possible reason. Colonoscopies tend to be technically more challenging in female patients.
After a colonoscopy, eat foods that are soft and easy to digest to ease side effects such as bloating or gas. This may include eggs, white toast, and applesauce for breakfast. For lunch or dinner, choices could include lean chicken without skin, mashed potatoes, and soft-cooked carrots.
The First 24 Hours of Recovery
Because a colonoscopy is performed with the patient under the effects of sedation, the patient will need to arrange for a ride home. Once they are at home, patients should allow themselves at least 24 hours to rest and recover.