Application of renal pelvis uret bidirection drainage tube in nephrolith operation .

肾盂输尿管双向引流管在肾结石手术中的应用。

Calcium deficiency puts a great influence on the human health , not only results in the osteoporosis , but also leads to the danger of hypertension , mammary cancer and nephrolith .

缺钙对人体的健康有很大的影响，不仅会引起骨质疏松症，而且会导致增加患高血压、乳癌和肾结石的危险。