[Health Column] What Does an Abdominal Ultrasound Test? Fasting Times and Pre-Examination Preparation (Internal Medicine Tests Part 1)

 

 

If you have an abdominal ultrasound coming up "Which organ is being examined," "How many hours do I need to fast," "Is water or medicine okay?" It is easy to start wondering. If your liver enzyme levels were high during a health checkup or you were recommended an examination due to frequent abdominal discomfort, you may be more concerned about how to prepare.

 

Abdominal ultrasound is an imaging test that uses ultrasound to visualize the internal organs. It is not a test that uses radiation, The organs to be examined and the preparation methods vary depending on the area to be examined. The abdominal ultrasound information on the Korea Disease Control and Prevention Agency's National Health Information Portal also distinguishes the examination areas and preparation requirements based on whether the upper or lower abdomen is being examined.

 

 

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1️⃣ Which organs are examined with an abdominal ultrasound?

 

In upper abdominal ultrasound, mainly Liver, gallbladder, bile duct, pancreas, spleen We examine it. Depending on the purpose of the examination, the kidneys or surrounding structures may also be checked.

 

Abdominal ultrasound can be used to examine structural changes in organs, such as fatty liver or gallstones, or to identify the cause of abdominal pain. However, the necessary tests are not determined by symptoms alone, and the purpose of the examination may vary from person to person.

 

Inspection site	The organs primarily checked	Points to check when preparing
Upper abdominal ultrasound	Liver, gallbladder, bile ducts, pancreas, spleen, etc.	There are many cases where fasting is necessary.
Lower abdominal ultrasound	Bladder, prostate, uterus, ovaries, etc.	You may be instructed to fill your bladder.

 

 

 

2️⃣ Why is the fasting time important for an abdominal ultrasound?

 

In upper abdominal ultrasound Food or intestinal air can block some organs. You are often advised to maintain a fasting period of time.

 

In particular, when you eat, the gallbladder contracts, and as food or gas forms in the stomach and intestines... It may become difficult to observe the areas around the gallbladder, bile ducts, and pancreas.

 

Therefore, the fasting time for an abdominal ultrasound is an important part of the preparation before the examination. However, since the fasting time may vary depending on the examination site and the method used by the testing facility, It is most accurate to first check the time provided when making a reservation. The Korean Society of Ultrasound in Medicine's guidelines for abdominal ultrasound examinations also provide information on fasting and preparation for upper abdominal ultrasounds.

 

3️⃣ What should I do with water or medication before an abdominal ultrasound?

 

The term "fasting" can be confusing, as it may imply that even water should be avoided. However, since guidelines for water or beverage intake can vary depending on the type of test and the institution, rather than making an arbitrary judgment... It is recommended to check the instructions you received.

 

If you usually take any medication It is important not to stop on your own due to the test. In particular, if you are undergoing multiple tests on the same day or taking medications that affect meal times, such as diabetes medication, it is advisable to check the dosage instructions in advance on the day of the test.

 

 

 

4️⃣ Is the preparation different for upper and lower abdominal ultrasounds?

 

Not all abdominal ultrasounds are prepared in the same way. While fasting is often important for upper abdominal ultrasounds, for lower abdominal ultrasounds, depending on the organ being examined, you may be instructed to hold your urine to fill your bladder. You can receive guidance.

 

If the bladder is properly filled, it can be helpful for observing the bladder or surrounding pelvic organs. Conversely, since different preparations may be required depending on the examination method, Rather than thinking "I must fast because it's an abdominal ultrasound," first check which area is being examined. It is good to do so.

 

5️⃣ Can all abdominal diseases be detected with an abdominal ultrasound?

 

Although abdominal ultrasound can examine various abdominal organs It is not a test that checks for all diseases at once. Depending on the air in the intestines, body shape, or the location of the lesion, some areas may not be clearly visible.

 

Depending on the purpose of the examination, blood tests, CT scans, MRI scans, or endoscopy may be used in combination. In particular, if the goal is to directly examine the inner mucosa of the colon or polyps, ultrasound and colonoscopy play different roles. Colonoscopy screening frequency and criteria for identifying colon polyps are Part 3 of this series We will continue to look into this.

 

 

 

💬 Frequently Asked Questions (FAQ)

 

Q1. Which organs does an abdominal ultrasound examine?

A1. Abdominal ultrasound primarily examines upper abdominal organs such as the liver, gallbladder, bile ducts, pancreas, and spleen, as well as lower abdominal organs such as the bladder, prostate, uterus, and ovaries. The organs examined may vary depending on the purpose of the examination.

 

Q2. How long is the fasting period required before an abdominal ultrasound?

A2. For upper abdominal ultrasounds, fasting for 6 to 8 hours is generally recommended as food or intestinal air can obscure the organs. However, the recommended fasting time may vary depending on the examination site and organ, so please confirm when making a reservation.

 

Q3. What should I do with water or medication before an abdominal ultrasound?

A3. Guidelines for taking water or medication may vary depending on the type of test and the institution. If you are taking any medication regularly, do not stop taking it arbitrarily; it is recommended to check the instructions for administration on the day of the test in advance.

 

Q4. Can all abdominal diseases be detected with an abdominal ultrasound?

A4. While abdominal ultrasound can visualize various abdominal organs, it is not a test that diagnoses all diseases at once. Depending on intestinal gas, body type, and the location of lesions, some areas may not be clearly visible, and other tests may be performed in conjunction as necessary.

 

🎯 To summarize

 

✔️ Abdominal ultrasound is Shape and abnormal findings of abdominal organs such as the liver, gallbladder, bile ducts, pancreas, and spleen This is a test to verify.

✔️ Food or intestinal gas can affect the upper abdominal ultrasound examination. There are many cases where fasting is necessary.

✔️ Preparation for abdominal ultrasound depends on the examination area Fasting, water intake, medication, bladder preparation It may change.

 

If you are unsure about how to prepare for your upcoming examination, please check with your scheduled hospital in advance. Feel free to ask any questions you may have during your consultation. 😊

 

 

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