When Should I Have an Ultrasound During Pregnancy?

Ultrasound is called ultrasound because its frequency exceeds the limits of human hearing.

Ultrasound

Ultrasound is an advanced medical technology, which has better directivity and is a diagnostic method commonly used by doctors.

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First, need fasting inspection:

Examination of the upper abdomen, such as liver, gallbladder, bile duct, pancreas, adrenal gland, renal artery, left renal vein, abdominal blood vessels, retroperitoneal, upper abdominal mass, etc., requires a fasting inspection, usually fasting after dinner the previous day, times Fasting examinations in the morning and morning to ensure bile filling in the gallbladder and bile ducts and reduce the interference of food and gas in the gastrointestinal tract, otherwise the test results may be greatly affected. The quality of ultrasound images in these areas is easily affected by intestinal qi, so patients with bloating or constipation should take digestive drugs before examination, help ventilate, or use dehydration or some light vents to help defecation.

In addition, transesophageal echocardiography must be booked in advance. The doctor will instruct the patient to check the abdomen. The patient should also carry the results of transthoracic echocardiography, so that the examining doctor can quickly understand the condition and target it during transesophageal examination. Because this test is semi-invasive, there is a certain risk (generally not high), and family members and patients need to sign the informed consent form, so they should be accompanied by a direct family member.

Preparation before ultrasound examination

2. Examination that requires filling the bladder (commonly known as urination):

Examination of the pelvis, bladder, prostate, seminal vesicle glands, lower ureter, lower abdominal mass, uterus, accessories, early pregnancy, etc., requires filling the bladder. You can drink 1000-1500 ml of water (or various beverages) 1-2 hours before the test. Do not urinate after drinking water, so that the bladder is full to facilitate the test. Those who are more than 3 months pregnant do not need special preparations, but those with suspected placenta previa in the middle and late pregnancy still need to drink water to fill the bladder.

Preparations before B-ultrasound:

1. Before examining the abdomen, patients need to fast for more than 8 hours to ensure that the bile ducts of the gallbladder are filled with bile and reduce the interference of gastrointestinal contents and gas. Fasting usually begins after dinner the day before and is checked on an empty stomach the next morning. The inspectors fasted at noon in the afternoon.

2, bladder, prostate examination, need to fill the bladder. Please drink 1000-1500 ml of water (or various beverages) 1-2 hours before coming to the hospital. Do not urinate after drinking water, so that the bladder will be adequately filled to facilitate examination.

3. X-ray gastrointestinal barium is a strong reflection and absorbent of ultrasound. Barium remains in the gastrointestinal tract near the gallbladder and bile duct, which will affect the ultrasound examination. Ultrasound examination should be performed three days after X-ray gastrointestinal angiography and two days after biliary angiography.

4. Gastroscopy and colonoscopy need two days before ultrasound examination.

5. Observation of the effect of abdominal flatulence on the image of the gallbladder, bile ducts and pancreas, which can be checked after taking lactase tablets for three days.

4. Preparations for Obstetrics and Gynecology Patients:

1. When performing gynecological abdominal and pregnancy examinations for less than three months, in order to avoid the effects of intestinal contents, especially gas, it is advisable to empty the stool before the examination so that no intestinal mass or barium remains in the intestine.

2. Drink 1000-1500 ml of water (or various beverages) 1-2 hours before coming to the hospital. Do not urinate after drinking water, so that the bladder is adequately filled to facilitate examination. There is no special preparation for obstetric patients who are more than 3 months pregnant Those with suspected placenta previa in the second and third trimester of pregnancy still need to drink water to fill the bladder before checking.

5. There are no special requirements for the heart, limb blood vessels, thyroid, breast, pleural effusion, and gynecological menopausal examination and transcranial Doppler ultrasound examination.