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- $Unique_ID{BRK01022}
- $Pretitle{}
- $Title{What is a "Potassium" Blood Test For?}
- $Subject{potassium diuretics blood pressure Special procedure Procedures
- Laboratory test Tests water pills pill diuretic pressures hypertension}
- $Volume{P-7}
- $Log{}
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- Copyright (c) 1991-92,1993 Tribune Media Services, Inc.
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- What is a "Potassium" Blood Test For?
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- QUESTION: We are senior citizens and would like to know just what a certain
- blood test is for. Some of our doctors have a test taken every six months
- when we are in for a blood pressure check. It is usually for "potassium" but
- we have no symptoms of a lack of potassium and are not treated for anything
- else, so why?
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- ANSWER: A regular blood test for potassium at six month intervals would make
- no sense to me either, if you hadn't mentioned that it occurred while you were
- having your blood pressure checked. Did you forget to tell me that some of
- you were being treated for high blood pressure? One classification of
- medications commonly used to reduce elevated blood pressure is the "thiazide"
- group, also known as "diuretics" or "water pills". They work to reduce the
- pressure by reducing the volume of blood through increased urinary excretion,
- but they also provoke a loss of sodium, potassium and chlorides as well. They
- are well tolerated as medications, having few side effects and are frequently
- chosen as the first medication in the treatment of hypertension. Since they
- extract potassium from the body, regular blood tests can be used to check the
- levels. Potassium is a most important chemical for the body to have in just
- the right amounts, as it can effect the way electrical currents are carried
- through the heart, and thus the way the heart beats. In most cases, there is
- no need to replace potassium in people who are on diuretics, but when the
- levels are low, liquids containing extra potassium can be provided. Bananas
- are also an excellent source of potassium, as are prunes, raisins and whole or
- skimmed milk. If you are on water pills, and receive no additional medication
- after the blood tests, it is because you are maintaining the right levels of
- potassium and so have no need for more medication, and certainly nothing to
- worry about.
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- The material contained here is "FOR INFORMATION ONLY" and should not replace
- the counsel and advice of your personal physician. Promptly consulting your
- doctor is the best path to a quick and successful resolution of any medical
- problem.
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