What is a kidney stone?
A kidney stone is a hard, crystalline mineral
material formed within the kidney or urinary tract. Kidney stones are a common
cause of blood in the urine and often-severe pain in the abdomen, flank, or
groin.
What causes kidney stones?
- Kidney stones form
when there is a decrease in urine volume and/or an excess of stone-forming
substances in the urine.
- The most common type
of kidney stone contains calcium in combination with either oxalate or
phosphate. About 75% of kidney stones are calcium stones.
- Other chemical compounds that can form
stones in the urinary tract include uric acid, magnesium ammonium
phosphate.
- Dehydration from
reduced fluid intake or strenuous exercise without adequate fluid
replacement increases the risk of kidney stones.
- Obstruction to the flow of urine can also
lead to stone formation.
- In this regard, climate may be a risk
factor for kidney stone development, since residents of hot and dry areas
are more likely to become dehydrated and susceptible to stone formation.
- Kidney stones can
also result from infection in the urinary tract; these known as infection
stones.
- Metabolic abnormalities, including
inherited disorders of metabolism, can alter the composition of the urine
and increase an individual's risk of stone formation.
What are kidney stones symptoms and
signs?
- While some kidney stones may not produce
symptoms (known as "silent" stones), people who have kidney
stones often report the sudden onset of excruciating, cramping pain in
their low back and/or side, groin, or abdomen.
- Changes
in body position do not relieve this pain. The abdominal, groin, and/or
back pain typically waxes and wanes in severity, characteristic of colicky
pain.
- It
may be so severe that it is often accompanied by nausea and vomiting.
- The pain has been described by many as
the worst pain of their lives, even worse than the pain of childbirth or
broken bones.
- Kidney stones also characteristically
cause blood in the urine.
- If
infection is present in the urinary tract along with the stones, there may
be fever and chills.
- Sometimes, symptoms such as difficulty urinating, urinary urgency, penile pain, or testicular pain may occur due to kidney stones.
What is the treatment for kidney stones?
·
Most kidney stones eventually pass through the urinary tract on
their own within 48 hours, with ample fluid intake.
·
Although there are no proven home remedies to dissolve kidney
stones, home treatment may be consider for patients who have a known history of
kidney stones.
·
Since most kidney stones, given time, will pass through the urethra
to the bladder on their own, treatment is direct toward control of symptoms.
·
Home care in this case
includes the consumption of plenty of fluids.
There are several factors, which influence the ability to pass a
stone.
·
These include the size of the person, prior stone passage, prostate
enlargement, pregnancy, and the size of the stone.
·
A 4 mm stone has an 80% chance
of passage while a 5 mm
stone has a 20% chance. Stones larger than 9 mm-10 mm rarely pass without
specific treatment.
For
kidney stones that do not pass on their own, a procedure called lithotripsy is
often used. In this procedure, shock waves are use to break up a large stone
into smaller pieces that can then pass through the urinary system.
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