EvoElite Keto This is the most important diagnostic test. This is the final method to confirm the diagnosis of gouty arthritis , as opposed to other causes such as joint infections The needle is inserted into the joint to take a sample of joint fluid for examination The liquid is examined under a microscope to see if there are gout crystals or signs of bacterial infection. Sometimes other crystals can be found in joint fluid, such as calcium pyrophosphate, which is caused by a completely different condition called pseudogout (like gout)Joint pain due to gout is sometimes diagnosed based on the typical clinical presentation without joint aspiration. http://www.bevinselfportrait.com/