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Perhaps the
most aggravating arthritis to those afflicted is an acute gouty
attack. This condition is quite debilitating to the individual in
that even the weight of the bed sheet causes discomfort. This type
of arthritic attack is seen in predominately males and usually attacks
the patient during a slumber. It has been well documented throughout
history. A notable American founding father, Ben Franklin, had been
so afflicted that he had to be carried into Congress due to his
inability to walk. His chair was in the back of the "House" near
a window so that he could allow his burning pain be relieved by
the occasional outdoor breeze.
Gout is caused
by the elevated levels of uric acid which is a byproduct from the
synthesis of the purine type of amino acids. The elevated level
of uric acid in the blood is known as hyperuricemia. There are two
classifications of hyperuricemia.
"Over producers" and "under excreters" are the kinds of mechanisms
that define the cause of hyperuricemia.
An example of
an "over producer" would be a psoriatic patient. Psoriasis is condition
of the skin in which the cells in certain areas replicate at an
accelerated rate thus causing a plaque of scaly skin. Normal skin
replaces itself in 28 days as compared to a psoriatic patch which
takes 10 days. This rapid turn over of cells increases the synthesis
of amino acids. The increase in the purine synthesis likewise increases
the level of uric acid. The kidneys are excreting the uric acid
but not as fast as it accumulates in the blood.
An example of
an under excreter is an individual that has normal levels of uric
acid but a restricted amount of uric acid is urinated from the kidney
thereby elevating the level in the blood. In the previous example,
the kidneys are not eliminating the normal amount of uric acid produced
from normal metabolism. This comprises 90% of the hyperuricemic
patients and usually have an underlying renal (kidney) disease or
failure.
Some drugs likewise
may increase the level of uric acid. Low dose aspirin, thiazide
and "loop" diuretics are examples of uric acid elevators. High dose
aspirin, al-lopurinol, probenecid and sulfinpyrazone are drugs that
decease blood levels of uric acid. The normal blood value of uric
acid ranges from 2.5 to 7.5 mg/dl depending on the laboratory method
of measurement.
During an acute
gouty attack, the uric acid (UA) may elevate as high as 10 mg/dl
or more . This is seen prior to the attack and the UA level may
dip back to a high normal value e.g. 6.9 mg/dl. The explanation
is simple . The UA is a crystal that has left the blood and has
precipitated into a joint thus decreasing the serum level. Once
the UA crystal enters the joint the inflammation begins. This is
the painful presentation that gout delivers.
The crystal
is a needle like structure that is engulfed by the white blood cells(WBC).
As the WBC tries to digest this foreign invader, it becomes ruptured
and enzymes are released from the exploded WBC. This further inflames
the joint causing more WBCs to join the battle. Hence, a complete
inflammatory attack occurs causing great discomfort. The clinical
scenario is a red (rubor), hot (calor), swollen (tumor), painful
(dolor) joint that has loss of function. Typically the first metatarsal
phalangeal joint (great toe) is involved, however, any joint can
be involved in a gouty attack.
Treatments for
gout vary. However, the drug of choice is indomethacin (INDOCIN)
50 mg 3x a day (t.i.d.) or 4x a day (q.i.d.) with food (ac). Cholchicine
is another alternative. Avoidance of aspirin particularly low doses
is necessary. Limited activity is usually driven by the pain the
patient experiences. For chronic hyperuricemia, allopurinol (ZYLOPRIM)
100mg 2x a day (b.i.d.) or t.i.d. is recommended. Dietery restrictions
of purine rich or uric acid rich foods should be employed. Such
foods include sweetbreads (liver, brains etc.) and shellfish (lobster,
shrimp etc.). Alcohol does greatly participate in the precipitation
of the gouty attack therefore avoidence of alcohol is always recommended.
Dr.
Graham has been in private practice in Effingham since 1989 and
is on staff at St. Anthony's Memorial Hospital and Effingham Ambulatory
Surgical Treatment Center. He is Board Certified by the American
Board of Podiatric Surgery and American Board of Podiatric Orthopaedics
and Primary Podiatric Medicine. Dr. Graham is a Fellow of the American
College of Foot and Ankle Surgeons, the American College of Foot
and Ankle Orthopaedics and Medicine, and American Professional Wound
Care Association. He is also a member of the American Podiatric
Medical Association and the Illinois Podiatric Medical Association.
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