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Ultrasound machines have become very common in hospitals and clinics since these provide very detailed results without the risk that traditional tools and equipment pose. Different approaches and techniques will be done depending on the organ to be studied and the condition of the patient. Ultrasound can also be done in such as short span of time and almost always require no special preparations. Here are the functions of the process.

For Obstetrics

Ultrasound machines are commonly used in pregnant women, whether they intend to simply view the current position, gender and condition of their baby or want to determine if there are any abnormalities. The uterus is the most common organ viewed among female patients, since it holds the fetus throughout pregnancy. Ultrasound scanning is recommended between 16 and 18 weeks of pregnancy.


Once the date of conception is identified, the test can show if the fetus is of the right size. If the date of conception is not yet known, ultrasound can help determine the accurate date of conception. The test will also effectively show if there is more than one baby in the womb. Congenital heart disease can be discovered too, allowing physicians to make the immediate and necessary treatments. Ultrasound can be used in conjunction with amniocentesis, wherein a needle is inserted to take amniotic fluid for analysis.

Other conditions and features that can be identified via the procedure include early fetal death, general health of the baby, position of the placenta, ectopic pregnancy and potential miscarriage. Other structures in the area such as the ovaries, fallopian tubes, etc. may also be viewed to identify cysts and causes of infertility.

Besides Pregnancy

Aside from obstetric reasons, ultrasound machines also function well for other cases such as checking the brain of the newborn baby, assessing internal organs like the appendix for possible complications and abnormalities, evaluation of the eyes and scanning the liver for cirrhosis and cysts. Ultrasound can also be used to scan the thyroid gland, spleen, bladder, breasts and eyes for the presence of foreign objects, cysts and tumors. Organ enlargement can be identified, together with tendon tears and approval for angioplasty.


For the Heart

A specialized type of ultrasound is called echocardiography, wherein the heart is checked for proper function and form. It is a major diagnostic method that aims to identify the valves, major blood vessels and heart wall. Blood flow moving across the valves and blood vessels can be measured too. Echocardiography comes in very useful to identify disorders of heart valves. The heart valves should be opening and closing normally.

Ultrasound machines for echocardiography will come in handy too when trying to detect congenital heart disease, complications in the large blood vessels, blood clots in the heart chambers, heart muscle damage or enlargement or cardiomyopathy and pericarditis or inflammation of the pericardium. Aneurysms can also be detected.

Doppler echocardiography is a new ultrasound approach that can measure the velocity of blood flow through the heart indirectly. It can check for malfunctioning valves in the case of aortic stenosis and mitral insufficiency.

For Biopsy

Ultrasound machines are also used during fine needle biopsy procedures. It gives an actual moving image which is very useful when guiding the needle to reach the specific spot correctly. Follow doctor's instructions carefully before undergoing any procedure.
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Prostate ultrasound machines can show pictures of a male patient's prostate gland. The procedure usually involves the insertion of a probe into the individual's rectum. The probe will send and receive sound vibrations through the rectal wall right into the prostate gland, since it is located just in front of the rectum. The images presented will then give doctors a clear idea about the current condition and if further tests or treatment is necessary.

Basic Uses

A transrectal ultrasound involving the prostate gland is done to check for present disorders in the organ, to determine if the prostate gland is enlarged, to determine the cause of infertility among male patients and to detect abnormal growths in the prostate. Measurements will be acquired depending on the requirements of the treatment plan.

Symptoms can be diagnosed such as difficulty in urination, nodule felt by the doctor during routine physical check-up or during prostate cancer screening exam and elevation in blood test results. Needle biopsies can also be guided effectively by ultrasound since it provides real-time images. Biopsy is a procedure wherein sample tissues or cells are acquired from the prostate gland for future lab tests.

Preparations and Expectations

To prepare for prostate ultrasound machines, you have to wear loose-fitting and comfortable clothes. You will be asked to take off clothing, jewelry and other materials that are covering the area that needs to be tested. You may wear a gown too during the process. An enema is taken 2 to 4 hours prior to the test to ensure that your bowel is clean. The doctor will also ask you to drink 4 to 6 glasses of water before the test, since a full bladder better visualizes the prostate gland.

The equipment looks like a console with computer and electronics. There is a video display screen and transducer that will scan the blood vessels and organs. The transducer is similar to a microphone that sends out sound waves and listens for echoes returning to depict a clear image of the prostate. The device is covered and lubricated during both transrectal and transvaginal tests, since it has to be inserted.

During the Test

A disposable protective covering will be put over the transducer. Afterwards, it will be lubricated then inserted into the rectum. The presenting images will be acquired using different angles to get the clearest picture of the prostate gland. Prostate ultrasound usually requires the patient to lie on his or her left side with the knees bent slightly up.

If biopsy is also done during lesion detection, a needle will be advanced into the prostate gland. The radiologist checks the ultrasound machine to ensure that the needle is placed properly into the gland. Some tissue will be taken to be examined under the microscope. Once the diagnostic test is complete, you can dress up and wait for the radiologist and physician to review the findings. You can also walk out of the clinic instantly. The entire examination will take only about 20 minutes.

Most ultrasound machines are quick, easy and painless. You may feel slight discomfort as the transducer is inserted into your rectum. The lubrication will ease the pressure and friction. If a biopsy is done, added discomfort or mild pain may be felt by the patient since the wall of the rectum is usually insensitive near the prostate. You can resume regular activities afterwards.
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History of Ultrasound Machines

March 13th 2009 05:22
Technology has evolved very quickly in the past few years. Today, people no longer have to bear with long and painful techniques to accurately diagnosis underlying conditions and diseases. Ultrasound machines have shown to be quite effective and useful in several medical and non-medical cases, both minor and major. Learning more about the history of the devices will help you understand clearly how they truly work and function.

The Early Days

Ultrasound machine applications in the medical setting should have begun when people started measuring distance using sound waves underwater. SONAR actually means Sound Navigation and Ranging. Medical Sonars are also regarded as ultrasound scanners. In 1826, Dr. Jean-Daniel Colladon from Switzerland succeeded in using a bell underwater to know the speed of sound in Lake Geneva.

During the later 1800s, physicists started identifying the fundamental physics of sound waves, refraction, propagation and transmission. Lord Rayleigh from England, published "The Theory of Sound" in 1877. Lazzaro Spallanzani from Italy can be credited for discovering ultrasound in 1794 when he showed how bats can accurately navigate in the dark using echo reflection from inaudible sound in high frequency. Francis Galton created very high frequency sound vibrations in 1876, which was inaudible to human ears, through the Galton Whistle.

Breakthroughs

In 1880, Pierre Curie and Jacques Curie from France discovered the piezo-electric effect. Ultrasound was then found to be possibly generated and received in megahertz. Sonar detection systems were first created for underwater explorations and navigation. The invention of the Diode and Triode in the 1900s also boosted developments in ultrasound. Paul Langevin and Constantin Chilowsky from France developed strong high frequency echo-sound devices that produced ultrasound. The hydrophone was born, using the tranducer using quartz crystal discovered by the Curie brothers.

Dr. Ian Donald

Dr. Ian Donald suggested that sonar can be used in conjunction with medical diagnosis. The practice begun after ultrasound was used limitedly after World War II. On July 21, 1955, he started working on experiments involving the industrial ultrasonic metal flaw detector. Ultrasound was then found to be quite useful in detecting and differentiating fibroids, abdominal tumors and cysts.

Dr. Karl Theodore Dussik from Austria investigated transmission ultrasound in the brain in 1942 and published several items on medical ultrasonics. Dr. Ian Donald and other colleagues from Glasgow can be credited as doing a lot in the development of applications and practical technology. Their works have led to the wider use of the technology in present medical practice. More commercial systems were made available such as greyscale and bistable images. Doppler ultrasound was also developed by combining Duplex scanning and Color scanning. Today, even blood flow through the vessels of the body can be seen. 3D and 4D imaging are now available, led by the creation of the microchip in the 1970s.

There are several types of ultrasound available at present, each used depending on the current condition of the patient and the body organ that needs to be examined. All these are relatively safe, convenient and affordable to use. These also offer little to zero risk and do not require any preparations from patients. The procedures are also non-invasive and painless so individuals can immediately resume normal activities after testing.

It is possible that more than one scanning will be required depending on the clarity of images.
For more Nupur Das' Blogs -- http://www.xanga.com/nupurdas1958/weblog
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