做肠镜前的准备-科普 （ZT） Prep 中国大陆和美国的要求有不同

来源: willows 于 2026-02-28 05:47:56 [] [博客] [旧帖] [给我悄悄话] 阅读数 : (67096 bytes)
不知道有的人，是不懂英文，还是忽视了GI医生办公给的instruction，千万不要误导其他人。英文都是前一天不能吃饭，包括早饭，更不要说是固体食物，和蔬菜水果了，奶，酸奶都是不能在前一天吃的东西。
 
肠镜检查前一天不能吃固体食物（特别是高纤维食物）或要求清淡饮食，
主要是为了彻底排空肠道，确保检查清晰、准确。肠道内若有食物残渣、粪便或深色物质，会遮挡视野，导致息肉、小肿瘤被漏诊，甚至无法进行后续的治疗操作。
具体原因分析：
  • 确保视野清晰： 肠镜需要清晰观察肠壁状况。若残留物较多，医生就无法看清肠粘膜，严重影响检查结果的准确性。
  • 防止掩盖病变： 纤维素丰富的食物（如蔬菜、水果、菌菇）难以清洗，会黏附在肠壁上，遮盖可能存在的早期病变（如浅表息肉）。
  • 清理粪水残留： 即使是液体，检查前一晚也会要求禁食或只进食清流质，以最大限度减少肠道内粪水颜色残留，以免被误认为是出血或掩盖病变。
  • 避免阻塞镜体： 颗粒较大的食物残渣可能会阻塞内视镜的管腔，影响检查操作。
检查前饮食注意事项：
  • 检查前1-2天： 应进食低渣、易消化的半流质食物（如白粥、面条、蛋羹、白吐司）。
  • 避免吃： 红色、紫色或蓝色的食物/饮料，以及大量纤维蔬菜（豆类、金针菇、西红柿皮、红薯等），因为它们容易被误认为肠道出血或难以排空。
  • 检查前夕： 按照医院要求彻底禁食，并配合服用清肠剂（泻药）。

  •  

One Day Bowel Prep With MiraLAX and Dulcolax

Buy at the store: 这个是我发现最方便，大概也就10块钱左右，提前在amazon买，会更便宜。

Bottle of MiraLAX Box of Ducolax medicine bottle of sports drink
Large bottle (8.3 oz or 238 gm) of laxative polyethylene glycol 3350, such as MiraLAX 4 tablets Dulcolax?laxative tablets (5 mg each) Total of 64 ounces of a sports drink,?such as Gatorade?(no red or purple)
For diabetes: use?sugar free option


Starting 5 days before your procedure,?do not?eat:

Corn Nuts Leafy greens Popcorn
corn with X over it nuts with X over it leafy greens with X over it Popcorn with X over it
Fruit with skin
or seeds		 Whole grain or
high fiber foods		 Do not take vitamins with iron,
iron tablets, or fiber supplements.?
fruit with X over it pile of breads and grains with X over it bottle of iron pills and bottle of fiber, with X over it

About this prep

  • You will drink a medicine mixture to clear your bowels of all solid matter. You will need to go to the bathroom often, and your stool will get very watery. The prep may cause you to have cramps or feel bloated.
  • The prep medicine may not taste good. You need to take all of it so your bowels are clear. Your bowels are clear when you are passing pale yellow liquid without any stool.?
  • If you vomit up your prep medicine, have not had any bowel movements, or your bowels are not clear after this prep, please contact the health care provider who is doing your procedure.?The procedure may need to be rescheduled.
  • If you have a history of heart failure, kidney disease, cirrhosis of the liver, electrolyte problems, or chronic constipation, you may need a different bowel prep medicine. Please contact the nurse for instructions. ?
  • You should not smoke or vape the day before and on the day of your procedure. ???
  • If you have an implanted stimulator device, it should be turned off before your procedure.?Please bring the remote with you on the day of the procedure.?

Day before your procedure

Start Clear Liquid Diet

Do not eat any solid food or eat or drink any milk products until after your procedure is done. Drink only clear liquids. You can drink clear and light colored liquids up to 4 hours before your procedure.?Do not have anything with red or purple dye. ? ? ?

Okay to have:

glass of water coffee in a white cup ? ? ? ? ? ?bottle of lime soda Bottle of apple juice
Water, flavored water, or ice chips? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Coffee or tea?
(no milk or cream)? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?		 Ginger ale or?lemon-lime soda Fruit juices you can see through, such as?apple or white grape

?
Orange Gatoraide drink in bottle yellow popsicle 2 boxes of jello, yellow and orange bowel of yellow soup, with spoon
Gatorade, other?sports drinks, or drink mixes like Kool-Aid Popsicles
(no fruit or cream)
(no red or purple)		 Jell-O or other gelatin,
without fruit
(no red or purple)		 Clear broth or?bouillon

Do NOT have:

  • Alcoholic drinks
  • Milk
  • Smoothies
  • Milkshakes
  • Cream
  • Yogurt
  • Orange juice
  • Grapefruit juice
  • Tomato juice
  • Soup (other than clear broth)
  • Red or purple drinks
    ?

At 3 p.m., take 4 Dulcolax tablets.
Clock at 3 pm and 4 ducolax tablets

Pour all of the MiraLAX and 64 ounces of sports drink?into a larger container and shake well. Put it into the refrigerator to keep cool.
Images showing MiraLAX bottle plus sports drink bottle with arrow to bottle, then a hand shaking bottle to mix it, then arrow pointing to a refrigerator to keep cool.

At 6 p.m., drink one (8-ounce) glass of the mixture every 10 to 15 minutes until you finish half of it. It may help to use a straw. Put the rest back in the refrigerator.
Clock at 6 pm, shows steps of drinking 4 glasses and putting rest in refrigerator

6 hours before your procedure

6 hours before your procedure, drink the rest of the mixture. You may need to set your alarm to get up to finish your prep medicine. Drink two (8-ounce) glasses of clear liquids after you finish the mixture. You can drink clear liquids up to 4 hours before your procedure.
Steps of drinking 4 glasses of mixture and 2 glasses of water


You can take a small sip of water to take any allowed medicines within 2 hours of your procedure.?Your procedure will be delayed or canceled if you drink anything other than a sip of water with medicines. This is important to make sure it is safe to give you sedation or anesthesia.

If you have alcohol, marijuana, or illegal drugs in your system, your procedure may be rescheduled for your safety.

Arriving for the procedure

Arrive by the arrival time on your letter, so the staff can get you ready.?

  • Please leave all valuables and jewelry, including piercings, at home.
  • Patients who can become pregnant may need to give a urine sample in case a pregnancy test is needed.
  • Bring these with you to your procedure:
    • List of all medicines, including prescription and over the counter medicines, and any vitamin or herbal products you are taking
    • List of your allergies?
    • List of medical conditions and previous surgeries
    • Copy of your advanced directive, such as a living will or power of attorney
    • Photo identification, insurance card, and co-payment, if needed

What can you eat during bowel prep?

It’s important to closely follow the bowel prep instructions and avoid certain food and drinks as recommended before your testing.

Five (5) days before your test, you?may eat?food such as:

  • Milk, cream, cheese, yogurt, sour cream, hot chocolate
  • Breads and grains made with refined white flour, white rice, plain crackers, low-fiber cereal including puffed rice, corn flakes
  • Meat
  • Egg
  • Juice without pulp, applesauce, fruit without seeds or skin
  • Canned or cooked vegetables without skin or peel, tofu
  • Broth, bouillon, strained soups, milk or cream-based soup
  • Ice cream, sorbet, plain pudding, custard, Jell-O or gelatin without added fruits or red or purple dye, cookies or cake made with white flour without seeds, nuts, or dried fruit
  • Ensure, Boost without added fiber

One to two (1-2) days before your test (depending on your instructions), you’ll switch to a clear liquid diet. You can drink clear and light-colored liquids up to four (4) hours before your test. Do not have anything with red or purple dye.

How do you know when bowel prep is complete?

Good bowel prep is essential to have a high-quality colonoscopy exam. Otherwise, abnormalities in the colon, such as polyps, can be hidden by stool and undetected during your testing. Your colonoscopy may have to be repeated if bowel prep is not completed properly.

You should follow the diet instructions thoroughly and take the entire bowel preparation as prescribed. Your stool should be clear or yellow and translucent after you have completed the bowel prep.

?

Bowel prep color guide

Dark brownDark, murky:NOT READY

 

BrownBrown, murky:NOT READY

 

Dark-orangeDark orange, semi-clear:NOT READY

 

Light-orangeLight orange, mostly clear:ALMOST READY

 

Yellow-clearYellow, clear:READY

 




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