Active bendable sheath tube and sheath body bendable nasal gastrointestinal tube

The invention provides an active bendable sheathing canal and a sheath body bendable nasal gastrointestinal tube, and the active bendable sheathing canal comprises an operation part, a sheath main body, a front section bending assembly, a middle section bending assembly and a tail section bending assembly, the front section bending assembly, the middle section bending assembly and the tail section bending assembly are arranged on the two sides of the sheath body respectively, the front section bending assembly, the middle section bending assembly and the tail section bending assembly are not collinear with one another, and the operation part is connected to the sheath body. The front section bending assembly, the middle section bending assembly and the tail section bending assembly are used for controlling the sheath body to bend. 本发明提供了一主动可弯鞘管和鞘体可弯型鼻胃肠管，所述主动可弯鞘管包括一操作部、一鞘主体、一前段弯曲组件、一中段弯曲组件和一尾段弯曲组件，所述前段弯曲组件和所述中段弯曲组件以及所述尾段弯曲组件分别设置于所述鞘主体两侧，所述前段弯曲组件和所述中段弯曲组件以及所述尾段弯曲组件互相不共线，所述操作部连接于所述鞘主体，所述前段弯曲组件和所述中段弯曲组件以及所述尾段弯曲组