中文摘要：

现有的大肠内窥镜由于插入技术复杂,操作困难,检查过程中常给病人造成痛苦,有时甚至出现肠穿孔等医疗事故。针对这一难题,提出了一种具有螺旋结构的旋转自动插入大肠内窥镜新技术方案,阐述了螺旋结构与大肠壁摩擦产生推动力的机理,并建立了摩擦推进动力理论模型。研究设计了内窥镜的主体-镜体和螺旋结构,针对实际要求选择了多种材料制作镜体和螺旋结构,利用人体大肠模型进行了插入试验,试验结果为：内窥镜在直筒状大肠模型中以8 r/min的转速旋转插入时可实现推进速度约为30~45 cm/min,表明所设计的螺旋结构可在大肠模型中,通过旋转获得一定的推进力带动镜体行进。此项研究为今后进一步开发这种新型大肠内窥镜打下了基础。

英文摘要：

The operation technique of colonoscopy is so complicated that the insertion of colonoscopy frequently causes pains to patients and sometimes even leads to enterobrosis and other medical accidents. Aiming at this problem, a new technique on rotation auto-insertion colonovideoscope with spiral structure was developed. The mechanism about the propellant force generated by the friction between the spiral structure and intestine wall was introduced and the theory model on friction propellant power was established. We designed insertion tube and spiral structure that were the main body of endoscope. According to the actual demand, multiple types of materials were chosen for the insertion tube and spiral structure. Moreover, insertion test using human large intestine model was conducted. The result showed that in straight shape colon model the endoscope could attain the advance speed of 30 - 45 cm/min during the process of rotary insertion with the rotational speed of 8 r/min. In the colon model, the designed spiral structure could achieve some certain propulsion to drive the insertion tube moving forward by rotation.