Preview: Originally Published in Therapeutic Guidelines: Rheumatology, Version 2, 2010
Preview: Originally Published in Therapeutic Guidelines: Rheumatology, Version 2, 2010
Preview: Originally Published in Therapeutic Guidelines: Rheumatology, Version 2, 2010
Gout
Clinical presentations
Acute gout
Subacute gout
Chronic gout
Asymptomatic hyperuricaemia
Pathogenesis
Initial assessment
Management
Acute gout
Chronic gout
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Patients who are in a catabolic state (eg septic) or are dehydrated are at
an increased risk of developing an acute gout attack. This often occurs
during or immediately following a period of hospitalisation.
Subacute gout
Subsequent attacks can involve more joints and have more systemic
features, including fever. These attacks may be of limited severity and
may be separated by long intervals of relatively normal joint function.
Many may not be recognised as gouty attacks, but be presumed to be
due to sprains or other nonarticular (soft tissue) injuries.
Chronic gout
Eventually, recurrent attacks may fail to resolve completely and slowly
lead to a crippling destructive arthritis. Chronic gout may be oligo- or
polyarticular. Gouty tophi are frequently seen at this stage, and are
usually present on the elbows (olecranon bursae), knees (prepatellar
bursae) and peripheral joints such as the toes and fingers.
The symmetrical involvement of the small joints of both hands can
mimic rheumatoid arthritis or psoriatic arthritis. Complicating this
latter situation is the fact that elevated uric acid levels are common in
psoriasis due to increased cell turnover.
Asymptomatic hyperuricaemia
In adults, hyperuricaemia is arbitrarily defined as plasma urate
concentration greater than 0.42 mmol/L for males and 0.36 mmol/L
for females. The prevalence of hyperuricaemia in white males is 5%
to 8%, and is much higher in people of Maori or Pacific Island origin.
Asymptomatic hyperuricaemia may be present from birth in those with
an enzyme deficiency, but otherwise tends to occur in at-risk males from
puberty onwards, and in females after menopause. It may be present for
the life of the individual or lead to an attack of gout or manifestations
of nephrolithiasis.
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MANAGEMENT
The management of gout involves providing rapid pain relief for acute
attacks, preventing further attacks, and preventing the complications
of gout such as the formation of gouty tophi and destructive arthritis.
It is important that the health practitioner also manages associated
medical conditions such as excessive alcohol intake, hyperlipidaemia,
hypertension, obesity and glucose intolerance/insulin resistance.
Patient education about the need for therapy, if alcohol and dietary
modification fail to bring about a normal plasma urate, is pivotal to
the management. The emphasis should be on lifelong therapy and
maintaining adherence. The book Getting Rid of Gout may be a useful
adjunct.*
Acute gout
Initially, gout may subside spontaneously in less than a week, but the
patient will usually seek help. The acute treatment should focus on
reducing inflammation and usually has no effect on modifying the
plasma urate concentration. Nonsteroidal anti-inflammatory drugs
(NSAIDs) at the maximum recommended doses reduce inflammation
and pain relatively quickly. An attack will be aborted using:
1
* Emmerson B. Getting rid of gout. 2nd ed. Melbourne: Oxford University Press; 2003.
Gout
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