Importance and purpose of colonoscopy

Colonoscopy is an important tool for the prevention and early detection of colorectal cancer. According to the Hong Kong Health Bureau, colorectal cancer is one of the most common cancers in Hong Kong, with more than 5,000 new cases each year. Regular examinations can detect polyps and early-stage cancers early, significantly improving the success rate of treatment. Many people may be nervous when they hear the word "colonoscopy", but if you are prepared, the whole thing is not as scary as you think. When choosing a medical institution, consider whether the facilities are advanced, whether the doctors are experienced and whether the services are well-equipped.

Dietary precautions before the test

3 days before the test: the importance of a low-residue diet and recommended foods

The purpose of a low-residue diet is to reduce residue in the gut and make the cleansing process more thorough. It is recommended to choose foods that are easy to digest and low in fiber, such as white porridge, white bread, steamed fish, and tofu. Avoid high-fiber foods such as whole grains, vegetables, fruits, and nuts, as they can leave debris in the intestines and affect test results. Here are some specific dietary recommendations:

• Breakfast: white porridge with steamed eggs
• Lunch: Steamed fish rice
• Dinner: white noodles and soft tofu

The day before the exam: choosing and preparing a liquid diet

The liquid diet should be changed to a liquid diet the day before the test to further reduce the burden on the intestines. Suitable liquid foods include clear soups, juices (filtered), and sports drinks. Avoid red or purple drinks as they can be mistaken for bleeding. Here is an example of a liquid diet:

• Breakfast: filtered apple juice
• Lunch: clear chicken soup
• Dinner: sports drink

On the day of the exam: the rules and reasons for fasting

On the day of the examination, complete fasting is required, including water and food. This is to ensure that the intestines are completely empty and to avoid vomiting and effects on the visual field during the examination. If the test is scheduled for the afternoon, your doctor may allow you to drink a little water in the morning, but certain rules must follow your healthcare provider's instructions.

Selection and use of bowel cleansing agents

Comparison of different bowel cleansing drugs: pros and cons, what they apply

Some common bowel cleansers on the market include PEG (polyethylene glycol) and magnesium sulfate. PEG has the advantage of being less irritating and suitable for most people, but it requires plenty of water. Magnesium sulfate is more effective but can cause more intense discomfort. Here's a quick comparison table:

How and when to take bowel cleansing drugs correctly

Bowel cleansers are usually taken in two divided doses: the night before the test and the morning of the test. Drink enough water (about 2 liters) each time to thoroughly cleanse the intestines. After taking it, stay active to distribute the medicine evenly. If severe discomfort occurs, contact your doctor immediately.

Reactions and precautions after taking bowel cleansing drugs

After taking bowel cleansers, frequent bowel movements begin until watery stools are expelled. This indicates that the intestines have been cleansed. You may experience mild abdominal pain and gas during the process, which is normal. If you experience severe pain or persistent vomiting, seek immediate medical attention.

Check the flow of the day

Check-in, changing clothes, anesthesia consultation

On the day of the examination, you need to arrive at the medical institution in advance and carry out the registration procedures. The nurse will guide you through the change of examination gowns and anesthesia consultation. If anesthesia is an option, the anesthesiologist will assess your health and explain the risks involved.

Inspection Process Instructions

During the examination, the doctor inserts a flexible endoscope into the anus and examines the lining of the large intestine step by step. The whole process takes about 20-30 minutes. If polyps are found, the doctor may remove them directly and send them for examination.

Selection of anesthesia method (if any)

Colonoscopy in Hong Kong usually involves mild sedation or general anesthesia. Mild sedation can help you stay relaxed and conscious during the exam. General anesthesia will put you to sleep completely. Which option you choose depends on your individual needs and your doctor's advice.

Precautions after the test

Dietary Recovery Recommendations

After the examination, you should start with a liquid diet and gradually return to a normal diet. Avoid spicy, fatty, and high-fiber foods to avoid irritating the intestines. Examples of dietary recovery include:

• 2 hours after the inspection: water or clear broth
• 4 hours after the test: porridge or soft noodles
• 24 hours after the test: normal diet (avoid irritating foods)

Observation points: abdominal pain, bleeding, etc.

Mild abdominal pain and gas are normal after the test, but if the pain gets worse or lasts more than 24 hours, you should see a doctor immediately. Similarly, if you notice heavy bleeding or fever, you should contact your doctor in time.

Report interpretation and follow-up

The inspection report is usually completed within 1-2 weeks. If polyps or abnormal tissue are found, your doctor will recommend further testing or treatment. Even if the results are normal, you should still re-examine regularly as recommended by your doctor.

Frequently Asked Questions (FAQs)

Q: Is colonoscopy painful?
A: Most people do not experience significant pain with mild sedation, only mild discomfort.

Q: How long can I drive after inspection?
A: If you are under anesthesia, it is recommended not to drive or use machines for 24 hours.

Q: How often should I have a colonoscopy?
A: It is generally recommended to do it every 5 to 10 years for people over 50 years of age and more often in the high-risk group.

Handle colonoscopy with ease

Colonoscopy is an important step in maintaining gut health. As long as you follow the doctor's instructions and choose a professional institution, the whole process is very smooth. Early detection and treatment are the key to overcoming colorectal cancer, so don't be afraid to delay the test.

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