Transesophageal Echocardiography Cardiology What is transesophageal echocardiography (TEE)? Trans- is a prefix which means “through� and therefore transesophageal means through the esophagus. TEE is a specialised ultrasound technique used to visualise the heart from the esophagus. A flexible probe mounted with a transducer is passed through the mouth down the esophagus. Pictures of superb clarity can be obtained this way.
What is the purpose of this test? TEE allows detailed visualisation of the structures of the heart and great vessels. It is also used to examine the structure of the heart and its blood flow. It is especially useful in patients whose Transthoracic echo (TTE) images are not optimal and when there is increased clinical suspicion of certain conditions. Preparation before the test 1. You are required to fast for at least 6 hours before the test. 2. Be accompanied by a family member when you come for the test. 3. Please notify the doctor/medical technologist of any allergies, difficulty in swallowing, or problem with your mouth, esophagus or stomach. 4. You should not undergo the test if you are not feeling well (e.g. fever, running nose). Please call our appointment centre to reschedule.
How is the test done? Continuous monitoring of ECG, blood pressure and oxygen saturation will be done throughout the test. An intravenous cannula will be inserted in one of the veins to facilitate administration of medication. Mild sedation may be administered to aid relaxation during the test. A local anesthetic spray will also be given in the throat. A mouth guard is placed in your mouth through which the probe will be passed, through your mouth into the oesophagus. Once the probe is inside the oesophagus, you are required to breathe through your nose, and allow your saliva to flow out.
You should also avoid eating and drinking for at least 2 hours after the test to allow the numbness in the throat to wear off. Is the test safe? Ultrasound is extremely safe, and no known adverse effects have been reported. Most complications with TEE are minor and are due to the sedative medication and the introduction of the probe in the esophagus. Major complications occur in less than 1% of patients undergoing TEE.
The attending nurse will suck the saliva using a suction tubing. The whole procedure usually takes about an hour. After the test, the cannula will be removed. If sedation was given, you should recover for at least an hour before leaving, and it is advisable not to drive. Yishun Health is a network of medical institutions and health facilities of the National Healthcare Group. Admiralty Medical Centre • (65) 6807 8000 • www.admiraltymedicalcentre.com.sg Khoo Teck Puat Hospital • (65) 6555 8000 • www.ktph.com.sg Yishun Community Hospital • (65) 6807 8800 • www.yishuncommunityhospital.com.sg The information is correct at the time of printing and subject to revision without further notice.
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