目的 探讨混合痔切除外剥内扎术术式的改进方法。方法 应用该改进术式共治疗混合痔1126例，切除混合痔2489个，其中一次切除痔在3个以上乃至近环行切除仅留1 cm皮桥者450例，混合痔1461个。结果 术后创面渗血、疼痛及愈合时间均明显优于传统混合痔外剥内扎术； 术后排便通畅，随访6个月，无一例出现肛门狭窄； 创面愈合后疤痕较轻，外形美观，能最大程度恢复原肛门解剖结构和生理功能。结论 该术式方法简单、实用，克服了传统手术的不足。
ObjectiveTo evaluate the risk factors for central lymph node metastasis (CLNM) in papillary thyroid carcinoma (PTC) of cN0 staging. MethodsClinical data of 94 patients with cN0 PTC in Guangdong General Hospital who underwent thyroidectomy with prophylactic central node dissection (pCND) from March to July in 2014 were collected to analyze the risk factors of CLNM by using univariate and multivariate analysis methods. ResultsCLNM was found in 43 patients (45.7%). Multivariate analysis results showed that, the CLNM rate of patients with age < 45 years, tumor located in front of lobe by ultrasound, diameter of tumor > 2 cm, capsular invasion, and total number of central lymph node dissected > 3 were significantly higher (P < 0.05). ConclusionAge < 45 years, tumor located in front of lobe by ultrasound, and diameter of tumor > 2 cm are the risk factors of CLNM in patients with cN0 PTC, pCND should be performed for patients with some of the above risk factors.