当这种情况发生时，尿酸就会累积，形成尖锐的，像针尖一样的尿酸结石沉积在关节或组织周围，引起疼痛，炎症和肿胀！
When this happens, uric acid can build up, forming sharp, needle-like urate crystals in a joint or surrounding tissue that cause pain, inflammation and swelling.
针尖斜面向左静脉直刺法，对局部组织、血管损伤小，疼痛反应轻微，静脉穿刺并发症发生率低。
Conclusion: By adopting needle tip towards left venepuncture, patients had less injury of the local tissue and blood vessel, less pain reaction, and lower complications rate.
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