Hypothermia affects platelet and prothrombin function (23, 24); the surgical trauma will destroy the immune barrier function of ureter and renal pelvis mucosa, increasing the risk of bleeding and infection; when combined with high intrarenal pelvic pressure, it will easily lead to reflux and urinary extravasation, increasing the occurrence of complications such as infection, bleeding and urogenic sepsis. The gene discussed is F2; the disease is infection.