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Why
Be Concerned About Kidney
Stones?
The most obvious reason to learn about kidney
stones and modify a person's behavior accordingly
is to avoid the intense pain which they cause. But
the most important reason is because kidney stones
can quickly lead to failure of the kidneys which is
life threatening.
A kidney stone
that does not pass on out can block the urinary
tract. This blockage will probably cause pain
initially. But if medical attention is not received
to identify the cause of the pain and remove the
blockage, the pain is likely to gradually go away
over a few days time. This lack of pain may cause
the sufferer to think the crisis has passed when,
in fact, the kidney which has been blocked by the
stone has shut down. If left untreated in just a
few days this shut down can lead to permanent loss
of function in that kidney. A kidney stone can even
rupture the collection system of the
kidney.
Definition
The medical terminology for kidney stones is
Nephrolithiasis or Renal Calculi. A
kidney stone is a solid lump (from as small as a
grain of sand to as large as the size a golf ball)
made up of crystals that separate from urine and
build up on the inner surfaces of the kidney. A
remarkable color
photograph of a kidney
stone
over an inch long shown still inside a bisected
kidney is available from a medical center in
England.
There appears to
be an increase in the number of cases of kidney
stones in recent years. About 7 to 21 people out of
every 10,000 (or less than two tenths of one
percent) of the population will have a kidney stone
attack each year. In 1985 there were 1 million
cases of kidney stones in the United States. These
account for about 7 to 10 of every 1000 hospital
admissions (or nearly one percent). Four out of
five kidney stone cases (80 percent) are among men;
only 20 percent are women. And more causaisans have
kidney stones than Afro-Americans.
Location
Kidney stones usually are formed inside the kidney,
but they are sometimes found in the bladder or
ureter. Click to see a UCLA colorized drawing of
the Urinary
Tract.
The intense pain associated with kidney stones
usually occurs during the period of time that the
stone is being slowly moved along the small ureter
between the kidney and the bladder.
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