Gout Overview - What Causes Gout

Posted by Healthfitline On Tuesday, January 29, 2013
Gout is a kind of arthritis that results from an increased level of uric acid in the blood, leading to joint inflammation.  It may occurs due to a genetic defect that affects purine metabolism or due to other factors.  However, most of gout attacks appear to be related to either a sudden increase or a decrease in uric acid.  The decreased or increased level of uric acid in the blood, causes urate crystals to be deposited on joints, initiating an inflammatory process.  With frequent attacks or in chronic gout, there is an accumulation of sodium urate crystals, known as tophi  that are eventually deposited in peripheral areas (great toe, hands and ear).  Acute gout usually affects only one joint.

Gout Causes and Risk Factors
The risk of acquiring gout increases with age and with an increased body mass index. It is also more common in males than in females.  Other risk factors associated with gout can be classified as those that lead to overproduction and under production of uric acid.

Risks Factors that Leads to Over Production of Uric Acid are;
  • Excessive intake of foods that are high in purine, such as organ meat, shell fish.
  • During weight loss or starvation
  • Hereditary predisposition - problem with purine metabolism.
  • Medications that may interfere with secretion of uric acid.
  • Secondary to conditions that increases cell breakdown. Such as leukemia, multiple myelomaan anemia and chemotherapy.
Risks Factors that Leads to Under Production of Uric Acid are;
  • Malfunction of renal tubular or renal failure.
  • Side effects of certain medications, such as diuretics.
Signs and Symptoms of Gout
Signs and symptoms of gout can be categorized, depending on the stage of gout. There are four stages of gout;  Asymptomatic Hyperuricemia, Acute Gout Arthritis, Intercritical Gout and Chronic Tophaceous Gout.

Asymptomatic Hyperuricemia
No symptoms but the uric serum levels is usually above 7mg/dL - normal serum levels are 2.4-6.0 mg/dL in female and 3.4-7.0 mg/dL in males.

Acute Gout Arthritis
Acute arthritis is the most common symptom for people with increased serum uric acid, developing gout.  A preceding action or a trigger, such as a food, medication usually initiate the attack, occuring mostly at night. The patient may be awakened with severe pain, redness, swelling or edema of the affected joint. The most commonly affected joints are joints of the big toe.  Less commonly affected joints are the wrist, finger and elbow.

Intercritical Gout
Intercritical gout stage is usually with no symptoms. Gout attacks may disappear for months or years.  However, eventually the patient may experience an exacerbation that is followed by frequent episodes of attacks, involving more than one joint.

Chronic Tophaceous Gout
With Chronic or frequent gout attacks, sodium urate cyrstals called Tophi may be deposited in the synovium, subchondral bone, intrapatellar, achiles tendons and within other underlying joints.

Gout Complications
Possible complications associated with gout are;
  • Deposition of tophi on aortic walls, heart valves, eyelids, cornea and on the sclerae.
  • Renal or kideny stone formation
  • Renal failure
  • Chronic gouty arthritis
  • Infection due to rupture of tophi
Gout Diagnostic Tests
  • Microscopy or analyses of the synovial fluid of the joint involved.
  • Blood test to measure the level of uric acid.
  • Urine test to measure the level of uric acid.
  • X-ray of the affected joints
  • Biopsy of the synovial joints 
Gout Treatment
  • NSAIDs, such as ibuprofen, indomethacin, naproxen to relieve sudden pain or gout acute attacks. Other stronger pain relievers may also be prescribed, if need arises.
  • Corticosteroids to reduce inflammation and pain to patients who are not responding to other therapies.
  • Uricosuric agents like Probenecid to increase the excretion of uric acid in the urine.
  • Allopurinol, such as Xanthine Oxidase Inhibitor that blocks the formation of uric acid in patients at high risk of developing renal insufficiency. 
How to Prevent Gout
The following are preventive measures that you can take to prevent a gout attack;
  • Restrict consumption of food high in purine. Such as sardines, oils, organ meat (liver, kidney), dried beans and peas, mushroom, spinach and cauliflower.
  • Increase fluid intake
  • Exercises to help in maintaining required body weight.
  • Avoid alcohol consumption
  • Avoidance of factors that may trigger an attack. Such as drugs, alcohol, stress etc. 

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