3讨论 血尿酸水平取决于尿酸生成和尿酸排泄。尿酸主要经肾清除,血清尿酸与肌配比值可影响肾排泄率,工习。在COPD患者中,血清尿酸与肌醉比值比单独血尿酸水平更有价值,提供更多的信息比」,因此在我们的研究中选择尿酸与肌配比值而不是尿酸为观察指标。研究结果表明,血清尿酸/肌醉水平在6.7这一中位数值以上的COPD患者有较低的FVC%及FEV1%值,与血清尿酸/肌配水平在6.7这一中位数值以下的COPD患者比较,差异均有统计学意义。血清尿酸与肌配比值与FVC%及FEV1%呈负相关。分析原因,我们认为,COPD患者因肺功能受损致机体氧代谢失常,出现组织缺氧,从而引起能量代谢异常,三磷酸腺昔转化为二磷酸腺普和磷酸腺营,这就导致吟中间体和P}吟代谢的最终产物尿酸的生成增多,血清尿酸与肌醉比值因此升高。蒋萍等纽m〕发现COPD急性发作期患者血清尿酸与肌醉比值增高,随病情缓解而下降,这与我们的研究结果是相吻合的,这提示,血清尿酸与肌配比值可在一定程度上反映COPD患者肺功能受损情况。 鉴于条件受限,本研究中肺功能指标只检测了FVC%及FEV1,今后还需对其余肺功能指标进行分析。 此外,研究还表明,COPD患者分级越高,FVC%及FEVl%值越低,尿酸与肌醉比值越高。在日本接受家庭氧疗的COPD患者的研究显示,尿酸与肌醉比值显著增加的患者死亡率也明显增高[l8]。由于我们目前只是对COPD患者进行横断面研究,初步了解尿酸与肌配比值与其肺功能的关系,对COPD分级、尿酸与肌配比值与患者生存情况的关系还有待大样本的随访研究加以总结。 参考文献 [1]De Torres JP,Cordoba-Lanus E,López-Aguilar C.Creactive protein levels and clinically important predictive outcomes in stable COPD patients[J].European Respiratory Journal,2006,(05):902-907. [2]Marangella M.Uric acid elimination in the urine.Pathophysiological implications[J].Contributions to Nephrology,2005.132-148. [3]Braghiroli A,Sacco C,Erhetta M.Overnight urinary wric acid:creatinine ratio for detECTion of sleep hypoxemia:validation study in chronic obstructive pulmonary disease and obstructive sleep apnea before and after treatment with nasal continuous positive airway pressure[J].American Review of Respiratory Diseases,1993,(01):173-178. [4]Kojima S,Sakamoto T,Ishihara M.Prognostic usefulness of serum uric acid after acute myocardial infarction(The Japanese Acute Coronary Syndrome Study)[J].American Journal of Cardiology,2005,(04):489-495.doi:10.1016/j.amjcard.2005.04.007. [5]Ruggiero C,Cherubini A,Ble A.Uric acid and inflammatory markers[J].European Heart Journal,2006,(I0):1174-1181. [6]Anker SD,Doehner W,Rauchhaus M.(2003)Uric acid and survival in chronic heart failure:validatlon and application in metabolic,functional,and hemodynamic staging[J].Circulation,2003,(15):1991-1997.doi:10.1161/01.CIR.0000065637.10517.A0. [7]Sato N,Kurashima K,Ubukata M.Prognostic significance of serum uric acid in patients with chronic obstructive pulmonary disease receiving home oxygen therapy[J].Nihon kokyuki gakkai iasshw,2003,(02):74-80. [8]Mateos Antón F,Garcia Puig J,Gómez Fernández P.Degradation of purine nucleotides in patients with chronic obstruction to a lrflon[J].Med Clin(Bare),1989,(09):328-330.doi:10.1016/j.juro.2010.03.038. [9]Nagaya N,Uematsu M,Satoh T.Serum uric acid levels correlate with the severity and the mortality of primary pulmonary hypertension[J].American Journal of Respiratory and Critical Care Medicine,1999,(02):487-492. [10]Gosker HR,Bast A,Haenen GR.Altered antioxidant status in peripheral skeletal muscle of patients with COPD[J].Respiratory Medicine,2005,(01):118125.doi:10.1016/j.rmed.2004.05.018.