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The following lab tests may be done to see how well your lungs are working:Arterial blood gasesPulse oximetryThe following imaging tests can help determine where the blood clot is located:Chest x-rayCT angiogram of the chestPulmonary ventilation/p...
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A normal result essentially rules out pulmonary embolism. A lung scan can be performed in a hospital or an outpatient facility and takes about 45 minutes.Pulmonary angiography is the most reliable test for diagnosing pulmonary embolism but it is n...
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An embolism can be diagnosed through the patient's history, a physical exam, and diagnostic tests. For arterial emboli, cardiac ultrasound and/or arteriography are ordered.
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A pulmonary ventilation/perfusion scan is a pair of nuclear scan tests. These tests use inhaled and injected radioactive material(radioisotopes) to measure breathing(ventilation) and circulation(perfusion) in all areas of the lungs.V/Q scan; Venti...
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A lung perfusion scan is a nuclear medicine test that produces a picture of blood flow to the lungs. A lung ventilation scan measures the ability of the lungs to take in air and uses radiopharmaceuticals to produce a picture of how air is distribu...
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A lung perfusion scan and ventilation study are two diagnostic imaging studies. A lung perfusion scan assesses blood flow to the lungs.
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During a physical examination, a health care provider studies a patient''s body to determine the presence or absence of physical problems.
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An electrocardiogram(ECG) is a test that records the electrical activity of the heart.
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Electrocardiography is a commonly used, noninvasive procedure for recording electrical changes in the heart. The record, which is called an electrocardiogram(ECG or EKG), shows the series of waves that relate to the electrical impulses that occur ...
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Detailed information on electrocardiogram, including how the EKG/ECG is performed and what happens after the procedure
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The electrocardiography unit, also called an electrocardiograph, is an apparatus that indirectly measures the heart''s electrical activity and records it as a graphic tracing.Electrocardiography is used to detect heart-function abnormalities. It in...
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Did you know that electrical currents flow throughout your body? Because the strongest of these travels through your heart, doctors are able to monitor your heart by placing electrical sensors on the surface of your skin.
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The ECG (also known as EKG) is a test that records electrical signals from your heart onto a paper strip. The pattern of these signals can tell the doctor whether your heart is normal, under stress, or experiencing electrical problems, strain, or damage.
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The electrocardiogram(ECG) displays important information about the heart, including the occurrence of a heart attack or lack of oxygen, whether conduction of the heartbeat is disturbed, or its rate or rhythm altered. It is useful as a rapid indic...
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Detailed information on an electrocardiogram (EKG) procedure, including how the procedure is performed, reasons for the procedure, and pre- and post-evaluation instructions
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The Harvard Health Letter celebrates its 30th anniversary this year. In the first of a series, the Health Letter takes a look back at three decades in medicine.
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The pulse oximeter is a photoelectric instrument for measuring oxygen saturation of the blood.
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The pulse oximeter is a photoelectric instrument for measuring oxygen saturation of blood.A pulse oximeter measures the amount of oxygen present in blood by registering pulsations within an arteriolar bed(an area between arteries and capillaries)....
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Detailed information on peak flow meters, including how to obtain one, how to measure personal best peak flow, peak flow zones, and how a peak flow meter should be used, and information on oximeters and spirometer
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Impedance plethysmography, also called impedance test or blood flow or impedance phlebography, is a non-invasive test that uses electrical monitoring in the form of resistance(impedance) changes to measure blood flow in veins of the leg. Informati...
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A computed tomography(CT) scan is an imaging method that uses x-rays to create cross-sectional pictures of the body.CAT scan; Computed axial tomography scan; Computed tomography scan.You will be asked to lie on a narrow table that slides into the ...
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A pulmonary angiography is is a procedure that uses a special dye(contrast material) and x-rays to see how blood flows through the lungs.This test is done in a hospital. You will be asked to lie on an x-ray table.
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Pulmonary angiography is an x-ray of the blood vessels that supply the lungs. It is used to find a blood clot (pulmonary embolism) in these blood vessels. The procedure is done by a specially trained doctor called an interventional radiologist.
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An arteriogram is an imaging test that uses x-rays and a special dye to see inside the arteries. It can be used to see arteries in the heart, brain, kidney, and many other parts of the body.
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Detailed information on arteriogram, also called angiogram, including information on how the procedure is performed
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Computed tomography (CT) is a test that combines x-rays and computer scans. The result is a detailed picture that can show problems with soft tissues (such as the lining of your sinuses), organs (such as your kidneys or lungs), and bones.
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Detailed information on computed tomography scans, also called CT scan or CAT scan, including information on how the procedure is performed
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Detailed information on ultrafast computed tomography scans, also called ultrafast CT scan or ultrafast CAT scan, including information on how the procedure is performed
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Detailed information on CT scan, including how the CT scan is performed and what happens after the procedure
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Detailed information on ultrafast computed tomography (CT) scan, including reasons for the procedure, risks of the procedure, what to expect, and discharge instructions
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Computed tomography scanning, also called CT scan, CAT scan, or computerized axial tomography, is a diagnostic tool that provides views of internal body structures using x rays. In the field of mental health, a CT scan may be used when a patient s...
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Computed tomography(CT) scans are completed with the use of a 360-degree x-ray beam and computer production of images. These scans allow for cross-sectional views of body organs and tissues.CT scans are used to image a wide variety of body structu...
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Computed tomography(CT), formerly referred to as computerized axial tomography(CAT), is a common diagnostic imaging procedure that uses x rays to generate images(slices) of the anatomy.Computed tomography(CT) is an x-ray imaging procedure used for...
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Computed tomography(CT) scanning is a valuable diagnostic tool that provides physicians with views of internal body structures. During a CT scan, multiple x rays are passed through the body, producing cross-sectional images, or"slices," on a catho...
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Computed tomography(also known as CT, CT scan, CAT, or computerized axial tomography) scans use x rays to produce precise cross-sectional images of anatomical structures.With the development of modern computers, the scans enhanced digital capabili...
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Is there an alternative to iodine as a contrast medium in a CT scan?
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What is the difference between a pelvic CT scan and an abdominal CT scan?
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Ultrasound involves the use of high-frequency sound waves to create images of organs and systems within the body.An ultrasound machine creates images that allow various organs in the body to be examined. The machine sends out high-frequency sound ...
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Ultrasonography is a diagnostic technique that involves directing high frequency sound waves at tissues in the body to generate images of anatomical structures. Ultrasonography is also called sonography, diagnostic sonography, and echocardiography...
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Detailed information on ultrasonograpy, also called sonography including information on how the procedure is performed
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Detailed information on ultrasound and the potential risks and benefits An ultrasound scan is a diagnostic technique which uses high-frequency sound
waves to create an image of the internal organs. A screening ultrasound is sometimes done during the course of a pregnancy to monitor normal fetal growth and verify the due date. Ultrasounds may be performed at various times throughout pregnancy for different reasons:
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A thyroid ultrasound, or sonogram, is a diagnostic imaging technique used to evaluate the structure of the thyroid gland. The thyroid is an endocrine gland, which means that it releases its secretions directly into the bloodstream or lymph.
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My Ob/Gyn said they found fluid in the baby's kidneys during my 20-week ultrasound, so I have to have a level 2 ultrasound done. What does this mean?
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Diagnostic medical sonography, or ultrasound, is a technique using high frequency sound to create images of specific areas of the body to diagnose various pathologies. The diagnostic medical sonographer performs examinations, records anatomic cond...
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Ultrasonography is the study of internal organs or blood vessels using high-frequency sound waves. The actual test is called an ultrasound scan or sonogram.
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Since diagnostic sonography utilizes a nonionizing form of energy, there are no known bioeffects. Thus, diagnostic sonography is applied to a large spectrum of clinical disorders, including obstetrical, gynecological, abdominal, urologic, pediatri...
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This test uses ultrasound to examine the blood flow in the major arteries and veins in the arms and legs. The test is done in the ultrasound or radiology department or in a peripheral vascular lab.
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Doppler ultrasonography is a non-invasive diagnostic procedure that changes sound waves into an image that can be viewed on a monitor.Doppler ultrasonography can detect the direction, velocity, and turbulence of blood flow. It is frequently used t...
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Doppler ultrasound uses harmless sound waves to create a picture of your blood flow. This test can detect narrow or blocked arteries and blood clots in the veins.
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Doppler ultrasonography, also called Doppler ultrasound, is a noninvasive diagnostic procedure that uses an ultrasound scanner to convert sound waves into images of blood flow in body tissue and organs. Doppler ultrasonography does not use ionizin...
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