Ultrasound Examination ~ Pawprints and Purrs, Inc.

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Any health care links located here are NOT to replace a veterinarian visit; please take your cat to a vet immediately at any sign of odd behavior or any symptoms of illness or injury. Call your vet and describe your cat's symptoms with any of your concerns about the cat's well-being. Your veterinarian may discover changes in your cat's health that you have overlooked. It is always better to err on the side of caution.

Ultrasound Examination

Your cat has been scheduled for an ultrasound examination. The purpose of this procedure is to aid in making a diagnosis of the disease which has been causing your pet to be ill.

What is an ultrasound machine?

An ultrasound machine emits ultrasound waves that penetrate into your cat’s organs. They are reflected back into the hand-held probe that is placed on the skin. The pattern of the reflected sound waves creates an image that is viewed on a screen.

Is radiation involved?

No. Unlike x-rays, radiation is not part of an ultrasound examination.

What types of disease are diagnosed with an ultrasound examination?

The ultrasound examination permits a detailed view of many of the body’s organs. The kidneys, for example, are seen on x-rays, but only their size and shape can be determined. Ultrasound permits us to view the internal structures of these, and other organs.

An ultrasound examination is especially helpful for diseases of the heart. The examination is called an echocardiogram or an "echo." The heart’s wall thicknesses can be measured, and the size of its chambers can be determined. Motion can be detected so that an assessment can be made of the ability of the heart to move blood. The valves can be seen to determine if they are functioning properly.

Some specific diseases can be determined because they have a specific ultrasound appearance. Other diseases cause ultrasound findings that are not unique.

What is done in the latter instance?

One of the important features of an ultrasound examination is the ability to find abnormal areas in organs. This permits precise biopsy of those areas. A biopsy gives a pathologist a section of tissue that can be examined under the microscope for more information. In many cases, the ultimate diagnosis is made by the pathologist.

What steps need to be taken to prepare for an ultrasound exam?

No special preparation is needed if the heart is to be studied.

If organs in the abdomen are to be studied, your cat should be withheld from food for 12 hours. The urinary bladder is best visualized if it is full of urine. Do not let your cat urinate within 3-6 hours of the study, if possible.

Is anesthesia required?

If your cat is cooperative, no anesthesia or sedation is needed to perform ultrasound on the heart or the abdomen. If biopsies are to be taken, a short-acting anesthetic will be needed to help prevent complications.

Is it necessary to shave hair?

In most cases, yes. It is imperative that the hand-held probe make complete contact with the skin. Sometimes the hair can be moistened with alcohol, but most studies require hair removal.

What organs cannot be studied with ultrasound?

Air is the enemy of ultrasound waves. Since the lungs are air-filled, they cannot be studied. The exception is a mass that is located within the lungs. Bone also stops ultrasound waves, so the brain and spinal cord are not seen with an ultrasound study. Obviously, the bones are also not examined with ultrasound.

When will I know the results of the examination?

Since an ultrasound study is performed in real time, the results of what is seen are known immediately. In some cases, the ultrasound images are sent to a veterinary radiologist for further consultation. If this happens, the final report may not be available for a few days.

Page URL: http://www.sniksnak.com/cathealth/ultrasound.html

Resource References:
Much, much appreciation to Dr. Raymond Van Lienden, DVM of Clifton, VA USA for his extensive research in locating the material found on this page. Thank you, dear Doctor!