The podiatrists are right. Examing the joint fluid crystals under a polarizing microscope is the only way to reliably differentiate the crystals of gout from the crystals of pseudogout. Once that differentiation is made, the proper pharmaceutical product can be prescribed to suppress the gout.
I had that procedure done. The size of the needle used looked frightening, but there was surprisingly little pain.
If you do have gout, make sure that you don't have sleep apnea, which can cause gout plus many other life-threatening diseases if left untreated for a long time. And overcoming your sleep apnea can cure your gout, as it did for me.