تعريف
A Doppler ultrasound is a test that uses sound waves to examine parts of the body. It looks at the motion of fluids in the blood vessels.
أسباب الاختبار
Doppler ultrasound is used to:
- View the flow of blood through vessels and/or the heart
- View and evaluate blockages to blood flow, such as clots
- Assess build-up of plaque inside a vessel
- Monitor blood flow through repaired blood vessels such as bypass grafts
- Examine a baby during a pregnancy
المضاعفات المحتملة
In most cases, there are no complications with this test.
ما يمكن توقعه
قبل الاختبار
قد يقوم طبيبك بما يلي:
- امتحان جسدي
- Blood or urine tests
In some cases your doctor may instruct you to:
- Fast for 8-12 hours before the test. This will decrease the amount of gas in your intestines and make organs easier to see.
- Have a full bladder before the test. You may need to drink six or more glasses of water without going to the bathroom.
- Avoid smoking. Smoking can interfere with test results.
وصف الاختبار
You will lie on a table. Your doctor will put a gel on the skin over the area that will be examined. The gel helps the sound waves travel between the machine and your body.
The ultrasound machine has a hand-held instrument called a transducer. It looks like a microphone or wand. The transducer is pushed against your skin where the gel was applied. The transducer sends sound waves into your body. The waves bounce off your internal organs and echo back to the transducer. The echoes are changed into images that are shown on a screen. The doctor examines the images on the screen. Photographs of the images may be taken.
You may be asked to change positions or hold your breath during the exam.
بعد الاختبار
The gel will be cleaned from your body. You will be able to return to normal activities in most cases.
كم من الوقت سيستغرق ؟
About 30 minutes to 1 hour
هل سيكون هناك ألم؟
No
نتائج
A radiologist will examine the images after the test. Your doctor will let you know the results and talk to you about treatment.
استدعاء الطبيب
After the test, call your doctor if symptoms become worse.
في حالة الطوارئ ، اتصل على المساعدة الطبية على الفور.