Kidney Failure
- Kidneys are the organs that
     filter waste products from the blood. They are also involved in
     regulating blood pressure, electrolyte balance,
     and red blood cell production in the body.
- Symptoms of kidney failure are
     due to the build-up of waste products and excess fluid in the body that
     may cause weakness, shortness
     of breath, lethargy, swelling, and confusion.
     Inability to remove potassium from the bloodstream may lead to abnormal
     heart rhythms and sudden death. Initially kidney failure
     may cause no symptoms.
- There are numerous causes of
     kidney failure, and treatment of the underlying disease may be the first
     step in correcting the kidney abnormality.
- Some causes of kidney failure
     are treatable and the kidney function may return to normal. Unfortunately,
     kidney failure may be progressive in other situations and may be
     irreversible.
The
list of causes of kidney failure is often categorized based on where the injury
has occurred.
Perennial
causes (pre=before + renal=kidney) causes are due to decreased blood
supply to the kidney. Examples of perennial causes of kidney
failure are:
- Hypo volemia (low blood volume)
     due to blood loss
- Dehydration from
     loss of body fluid (for example, vomiting, diarrhea, sweating, fever)
- Poor intake of fluids
- Medication, for example,
     diuretics ("water pills") may cause excessive water loss
- Abnormal blood flow to and from
     the kidney due to obstruction of the renal artery or vein.
