do you have to fast before nitrous oxide?
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Nitrous Oxide This is the mildest form of sedation. If you are given nitrous oxide, you may feel nauseous so it's recommended you don't eat for at least a few hours before the procedure.
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Do not eat anything after midnight the night before your procedure. This includes hard candy and gum. Between midnight and up until 2 hours before your scheduled arrival time, you may drink a total of 12 ounces of water (see figure). Starting 2 hours before your scheduled arrival time, do not eat or drink anything.
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You can eat and drink as normal before some blood tests. But if you're having a "fasting blood test", you will be told not to eat or drink anything (other than water) beforehand. You may also be told not to smoke before your test.
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Fasting means you don't eat or drink anything but water usually for 8 to 12 hours beforehand. So, if your appointment is at 8 a.m. and you're told to fast for 8 hours, only water is okay after midnight. If it's a 12-hour fast, avoid food and drink after 8 p.m. the night before.
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Fasting means that you cannot eat or drink anything (except water) for six hours before surgery.
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Two to four hours before the procedure, be sure not to drink or eat anything (please consult your doctor on the exact time stop consuming clear liquids)..
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You'll usually be asked not to eat anything for 6 to 8 hours before the procedure, and to stop drinking 2 to 3 hours before the procedure – follow the instructions given to you by the hospital.
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Don't chew gum, sucking on breath mints, hard candy or ice. Don't smoke or use smokeless tobacco, Vape or chewing tobacco for 24 hours before surgery. Don't drink alcohol for at least two days before surgery.
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The HSG is performed while you are awake and does not involve general anesthesia. You won't need to fast the day or night before. On the day of the test, your doctor may suggest taking a painkiller like ibuprofen an hour before your HSG is scheduled. This can help with the discomfort of the test.
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That's why a fasting blood test usually requires fasting for 8-12 hours before your blood is taken. It's also recommended that you avoid alcohol for 24 hours before your fasting blood test, as well as any strenuous exercise.
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Tell your doctor about any prescription or over-the-counter medications or supplements you're taking. You may need to fast (refrain from eating or drinking) for four hours before the test.
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You may be instructed not to eat or drink anything except water for 9 to 12 hours before having your blood drawn. This is called a "fasting blood test." Fasting is not always necessary, but it may be recommended. Usually, you are allowed to take your medicines with water the morning of the test.
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Patients who can afford to skip more meals should stop solid food intake at 24 hours prior to colonoscopy. However, for patients who are not able to fast for long, they should be allowed to take solid food up to 14 hours prior to the procedure, thus reducing the need to over-starve them.
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It is important to take Beano just before the first bite of gas-causing food. If it is taken during or after a meal, some of the gas-causing complex sugars will find their way to the colon before they have had a chance to be broken down.
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Drink extra fluids (no caffeine) up to 2 hours before exam. 2 hours before exam – NPO (If medications needed, take only with swallow of water.) Please arrive 45 minutes before scheduled myelogram appointment.
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Fasting means that, with the exception of water, you refrain from eating or drinking for a minimum of 8 hours (10 to 12 hours is preferable) prior to the draw. This means no coffee or tea, so save that morning trip to the café for after your draw. Taking your vitamins or medications is OK, though.
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Before general anesthesia or IV sedation If you have been scheduled to have general anesthesia for your surgery it is essential that you do not eat or drink anything for 8 hours before surgery. Any liquid or solid food in your stomach during anesthesia can have life-threatening consequences.