Effect of Perianal Blockage with Methylthioninium + Ropivacaine Admixture on Postoperative Analgesia in Patients with Circular Mixed Hemorrhoids/SHI Yu， NI Rui， WANG Tianci. //Medical Innovation of China， 2025， 22(10)： 066-071

    [Abstract] Objective： To explore the effect of perianal blockage with Methylthioninium + Ropivacaine admixture on postoperative pain in patients with circular mixed hemorrhoids.Method： A total of 72 patients with circular mixed hemorrhoids who underwenthemorrhoidectomy were admitted to Department of Proctology，Maanshan General Hospital of Ranger-DureeHealthcare from August 2021 to August 2023 were retrospectively selected.The patients were divided into group A (postoperative subcutaneously of the incision margin and basal part injection with Methylthioninium + Ropivacaine admixture) and group B (postoperative subcutaneously of the incision margin and basal part injection with Compound Lidocaine Hydrochloride) according to diffrent postoperative analgesic methods， with 36cases ineach group.The degree of postoperative anal pain，the degree ofperianal margin edema ......