目的：探讨金属钛夹结合内镜圈套电凝在内镜下切除大肠息肉的可行性和优点。

Objective To discuss the feasibility and advantage of the use of titanium ring clamp and endoscopic electric coagulation therapy on large colorectal polyps.

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目的：探讨纤维支气管镜下高频电烧灼和镍钛金属支架置入在原发性气管癌治疗中的临床疗效和安全性。

OBJECTIVES: To explore the clinical curative effects and safety of high-frequency electrocautery and Nitinol stent implantation in patients with primary tracheal carcinoma via fiberoptic bronchoscope.

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