Directionally bent endoscopic catheter

Abstract

The invention discloses a directionally bent endoscopic catheter. The endoscopic catheter comprises a catheter handle and a catheter body, wherein the catheter body comprises a hard sheath tube with one end arranged in the catheter handle and a core rod coaxially inserted into the hard sheath tube; the front end part of the core rod comprises a bendable elastic tube section located in front of thehard sheath tube; an end cap is fixed to the front end of the elastic tube section; an elastic body capable of directionally bending the elastic tube section is connected between the end cap and thefront end of the hard sheath tube; and a deflector rod eccentric wheel driving mechanism capable of driving the hard sheath tube to move axially is arranged in the catheter handle. The endoscopic catheter is rotated through a knob, so that 360-degree bending of the catheter in all directions can be achieved; and the catheter is determined to be free of deflection in the bending direction, so thatthe bending precision is high.

Description

technical field [0001] The invention relates to the technical field of endoscopes, in particular to a directionally curved endoscope catheter. Background technique [0002] At present, the endoscopic catheters used in clinical operations, in order to facilitate large-scale observation and diagnosis and treatment in human diseased organs, the catheter head is required to be able to achieve a certain angle range of bending, so as to drive the endoscope or corresponding surgical instruments to In the operation under the environment of direct vision, the catheter bending (one-way or multi-directional) generally adopts the following methods: 1. A wire rope is set in the elastic plastic catheter for traction steering; 2. A steel wire rope is set in the metal snake for traction steering. Both methods use wire ropes for traction. [0003] For the bending of the elastic plastic tube, in addition to installing a steel wire rope in the tube, it is also necessary to set a support tube ...

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Problems solved by technology

[0003] For the bending of the elastic plastic tube, in addition to installing a steel wire rope in the tube, it is also necessary to set a support tube with a certain strength in the tube. On the one hand, the support strength of the plastic tube is improved; The bending length of the tube, the structure of setting the steel wire rope and the support tube in the plastic tube has the following disadvantages: 1. The radial size of the tube is enlarged; 2. The support tube is not easy to set and fix in the tube; 3. The tube is in the When bending under the traction of the wire rope, the bending direction and angle cannot be determined, which is not conducive to the judgment of the position of the catheter tip during surgery

[0004] For the catheter that adopts the bending and turning method of snake bone, the traction of the wire rope is still required to realize the bending, but because the installation of the snake bone segment and the catheter segment generally adopts the method of bonding or welding, the relative position to the catheter is fixed, and is affected by the bending angle. , bending radius and the number of wire ropes, it is not easy to achieve multi-directional bending

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