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Re: [GIWorld-Hepatitis] Digest Number 307

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  • 2byteme@bellsouth.net
    Dear Sue: A doppler ultrasound, for all practical purposes is the same as what is usually referred to as a regular ultrasound. The difference, and this is true
    Message 1 of 1 , Sep 30, 2000
      Dear Sue:
      A doppler ultrasound, for all practical purposes is the same as what
      is usually referred to as a regular ultrasound. The difference, and this
      is true with all ultrasounds, is the type of head they use on the
      device. While all use the principal of a "sonar" effect, meaning they
      bounce sound onto something, and send back the sounds to a receiver.
      This then is redirected into a picture of whatever you are looking at.
      The reason for the different heads is that they are made to
      penetrate to different depths, and also, since the sound in produced by
      "cycling" the sounds, the sound is vibrating and sent in pulses. These
      are very fast 10-100,000+ cycles per second. While it may sound very
      complex, it really is a simple device=you figure out how to outline a
      part of the body by determining what depth it is, how much tissue you
      need to go through, and what it is made of, then use the proper sound to
      get a basic picture of that area, and, have someone who is experienced
      in seeing this type of picture, and by comparison, you can tell many
      things by the image.
      Normally, you are trying to get a basic picture of an area, or
      organ, and see if there are any abnormalities, such as a thickening,
      stone, etc. The basic idea is done in any ultrasound, but in a doppler,
      you are using the device to focus on a specific target. The most common
      use of doppler is to look at the blood flow in veins and arteries. Since
      you have to get to a specific area, and then focus on the flow of that
      area, it is done with a different head that can penetrate through other
      tissue and focus on the site you are looking for.
      In your case, they are probably going to focus on the varices to
      judge the number, size, etc. of them, and whether they are interfering
      with any other areas. This will also tell them, if they can get a clear
      picture, of the thickness of the vessels, and whether they may pose some
      problem in the future. If they are very thin, they may need to take some
      action, or they may decide to wait and observe the area. But, it will
      give a reference point, if nothing else. It's a common problem, and the
      use of ultrasound is an excellent way to get a picture of an area
      without exposing someone to X-rays, any pain or danger from other
      procedures, and/or, where the bony areas would not allow a good look.
      As far as the biopsy goes, it is not comfortable. If done right, and
      depending on your pain tolerance, it may run from a mild discomfort, to
      painful. It is fairly quick. They will numb the area first, but that is
      only the tissue. Most people complain from the discomfort of the biopsy
      needle used to obtain the bone, or marrow, sample for microscopic
      examination.
      What they are looking for, you did not give enough info, so it
      probably has to do with the marrow's ability to produce certain types of
      blood cells. I hope this helps. Marty
      Message: 10
      Date: Fri, 29 Sep 2000 23:54:08 -0400
      From: "Susan Jackson" <suejacks@...>
      Subject: Re: Explanation Help

      Thanks Marty,

      It does help. It did mention bowel sounds were present and normal in
      pitch.
      Next question, when I go to the hematologist, my doc wants a bone marrow

      check, is it as bad as it sounds? Do they knock you out? My preference

      for
      anything over and above blood work. What does doppler ultrasound do,
      that
      normal ultrasound does not?

      Thanks Again,
      Sue
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