Part of the problem with diagnosing based on uric acid levels in the blood deals with some people's ability to have a supersaturated condition without crystallization. The other is that the solublitity is remarkable dependent on temperature and thus while solubility is pretty high at 98.6 F it is LOWER at 80F and VERY low at 60F.
People measure body temperature in the mouth...or some other indiscreet cavity. BUT where does gout typically strike, the big toe, the ankle, the last finger joints, the wrists...the COLDEST parts of the body. NOBODY gets a gout attack in the mouth...or the indiscreet cavity.
Thus an upraised toe all night with slow blood circulation in a cool room easily can become 20 degrees colder than the rest of the body...that's why the typical attack of big toe PODAGRA is at 5 AM.
(I read a case history of a homeless guy who was bedevilled with what seemed to be merciless gout but constant uric acid below 4...it took a while for one of the doctors to realize his leg circulation was rotten and the temperature of his feet often went below 60 degrees F. They gave him colchicine and the pain went POOF!)
Too bad though, once crystals form any chance of avoiding attacks with supersaturation disappear because that first crystal serves as an easy starting point for more.
All those dietary recommendations are just so much hooey from days of yore...when there's no cure, doctors WILL devise a way to get paid and the no-sweetbreads, no anchovies diet was just suuch nonsense. I'm sure Henry VIII's doctors were well respected and WELL paid...at least until they killed Henry with dietary recommendation for his gout.
I think to get rid of tophi once formed, it takes more than just
allopurinol...it take
allopurinol PLUS an agent to dump the uric acid; something like sulfinpyrazole. Those uricosurics are hard to take though, lots; of side effects.
I've been takig
allopurinol for a zillion years and the tophus on my thumb won't abate.(I've got a story about that thumb for later.)
My favorite gout line, and it was really an epiphany when I read it:
The humorist Calvin Trillin was asked what was the ONE most important thing he learned in his long life. His reply:
"If you have a lump on your thumb, you have GOUT."
(That single short phrase made me realize what a cosmic JO my doctor was.)
Attacks while uric acid seems low: the joint may disengorge part of the tophus into the bloodsteam and cause crystalliztion elsewhere. That's why people often get an attack when first starting
allopurinol.