CN214678849U - Combined endoscope with visual expansion function and head end capable of being accurately positioned - Google Patents

Abstract

The utility model discloses a combined endoscope with visual expansion function and accurate positioning of head end, which comprises a guide needle, a sheath tube and a sheath tube joint coaxially connected with the rear end of the sheath tube, wherein the guide needle comprises a puncture needle coaxially inserted into the sheath tube joint and the sheath tube, the rear end of the puncture needle is coaxially connected with a guide needle tube joint, the guide needle tube joint is matched and fixed with the sheath tube joint, the front end of the sheath tube is provided with a guide structure which is matched with the front end of the puncture needle and guides the puncture needle to coaxially pass through the sheath tube, and a fiberscope channel coaxially communicated with the puncture needle is arranged in the guide needle tube joint; the flexible sheath section of the endoscope with the bendable head end can be coaxially inserted into the sheath tube, and the sheath tube not only can be used as an expansion channel for an operation, but also can be used as a guide channel for the insertion of the flexible sheath section, so that the flexible sheath section is helped to realize the rough positioning of the operation position.

Description

Combined endoscope with visual expansion function and head end capable of being accurately positioned

Technical Field

The utility model relates to the technical field of minimally invasive medical equipment, in particular to a combined endoscope with visual expansion function and accurate positioning of the head end.

Background

One of the most common diseases in urology surgery is kidney stones, and percutaneous nephroscopy is a minimally invasive technique widely used for treating kidney stones at present, and the technique is a surgical method for lithotripsy and stone extraction operation under the direct view of an endoscope by establishing micro-channels from the skin to a kidney collecting system. In recent years, great progress has been made in improving instruments of percutaneous nephroscopes, and further, the development has been towards minimally invasive and safe procedures. The visual nephroscope has the characteristic of whole visual puncture process, and the success rate under the condition of difficult puncture of the kidney without hydrops is further ensured. The nephroscope with the bendable head end can reduce the dead angle of the percutaneous nephroscope hard mirror; reduce the renal parenchyma laceration bleeding caused by the excessive swing of the lens body in the collecting system; the requirement of multi-channel stone breaking and taking is reduced; thereby further reducing the trauma of the operation and improving the success rate of the operation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the defects of the prior art and provide a combined endoscope with visual expansion function and accurate positioning of the head end on the basis of the existing visual nephroscope. The external member has the characteristics of integration of a sheath and a mirror, quick coaxial one-step expansion sheath arrangement and adjustable head end bending radius while realizing visual puncture.

In order to achieve the purpose, the utility model discloses a but combination formula endoscope that has visual expansion function, head end accurate positioning which its characterized in that: the guiding needle comprises a guiding needle, a sheath tube and a sheath tube joint coaxially connected with the rear end of the sheath tube, wherein the guiding needle comprises a puncturing needle coaxially inserted into the sheath tube joint and the sheath tube, the rear end of the puncturing needle is coaxially connected with a guiding needle tube joint, the guiding needle tube joint is fixedly matched with the sheath tube joint, the front end of the sheath tube is provided with a guiding structure which is matched with the front end of the puncturing needle and guides the puncturing needle to coaxially penetrate through the sheath tube, and a fiberscope channel coaxially communicated with the puncturing needle is arranged in the guiding needle tube joint; a soft sheath section of the endoscope with a bendable head end can be coaxially inserted into the sheath tube, and the head end of the soft sheath section can penetrate through the sheath tube and be bent.

Furthermore, the puncture needle comprises a guide pipe section coaxially arranged in the sheath pipe and a puncture needle pipe section coaxially communicated with the front end of the guide pipe section and positioned outside the sheath pipe, wherein the front end of the puncture needle pipe section is a tip end, an optical fiber endoscope connector is fixed at the inlet end of the optical fiber endoscope channel, and a guide structure which is matched with the front end of the guide pipe section and guides the puncture needle pipe section to coaxially penetrate through the sheath pipe is arranged at the other end of the sheath pipe.

Furthermore, the sheath tube comprises an outer sheath tube and an inner sheath tube coaxially inserted into the outer sheath tube, one end of the outer sheath tube is coaxially connected with an outer sheath tube joint, the rear end of the inner sheath tube is coaxially connected with an inner sheath tube joint, the outer sheath tube joint is matched and fixed with the inner sheath tube joint, the guide needle tube is coaxially inserted into the inner sheath tube joint and the inner sheath tube, the front end of the inner sheath tube is provided with the guide structure, and the guide needle tube joint is matched and fixed with the inner sheath tube joint; the soft sheath section can be coaxially inserted into the outer sheath tube, and the head end of the soft sheath section can penetrate through the outer sheath tube and be bent.

Furthermore, the diameter of the puncture needle pipe section is smaller than that of the guide pipe section, and a conical transition pipe section is connected between the rear end of the puncture needle pipe section and the front end of the guide pipe section; the guide structure is a conical guide pipe which is coaxially connected with the front end of the inner sheath pipe and matched with the conical transition pipe section.

Furthermore, a cavity communicated with the outer sheath pipe is formed in the outer sheath pipe joint along the axial direction of the outer sheath pipe joint, a guide sleeve for the hard sheath section to be inserted in the axial direction is fixed in the cavity, a drainage cavity capable of guiding water and secretion out is formed in the cavity between the guide sleeve and the outer sheath pipe, and a positioning ring platform which is coaxially communicated with the guide sleeve and is matched and fixed with the inner sheath pipe joint is fixed on the rear surface of the outer sheath pipe joint.

Furthermore, a guide sleeve inner hole is formed in the guide sleeve, a first limiting ring table is arranged on the hole wall of the front end of the guide sleeve inner hole, and the diameter of the first limiting ring table is smaller than that of the hard sheath section.

Furthermore, the outer sheath pipe joint is connected with a drainage pipe joint communicated with the drainage cavity.

Furthermore, an anti-rotation boss is coaxially fixed on the surface of the positioning ring table, and a first ring table positioning groove matched with the positioning ring table and a boss positioning groove matched with the anti-rotation boss are arranged in the inner sheath pipe joint.

Furthermore, the inner sheath pipe joint comprises a first inner sheath pipe joint ring platform, a second inner sheath pipe joint ring platform which is coaxially fixed on the inner surface of the rear end of the first inner sheath pipe joint ring platform and is of an integral structure with the first inner sheath pipe joint ring platform, the space enclosed by the inner wall of the first inner sheath pipe joint ring platform and the front end surface of the second inner sheath pipe joint ring platform is the ring platform positioning groove, the boss positioning groove is arranged on the inner wall of the first inner sheath pipe joint ring platform, and the second ring platform positioning groove matched with the second inner sheath pipe joint ring platform is arranged at the front end of the guide needle pipe joint.

Furthermore, the side part of the guide needle pipe joint is connected with a water injection channel joint communicated with the guide needle pipe.

The utility model has the advantages that: the visible dilator for guiding the optical fiber endoscope is composed of the guide needle, the sheath tube and the sheath tube joint, the puncture needle can accurately enter the treatment position of the kidney, puncture errors are avoided, sheathing operation of the outer sheath tube can be achieved without guide wire guiding in the puncture process, operation cost is reduced, meanwhile, the outer sheath tube can be matched with the endoscope with the bendable head end for use, the bending length of the soft sheath section can be adjusted by the outer sheath tube, the outer sheath tube not only can be used as an expansion channel for operation, but also can be used as a guide channel for inserting the soft sheath section, coarse positioning of the operation position of the soft sheath section is facilitated, bending operation is performed by matching with the part of the head end of the soft sheath section extending out of the outer sheath tube, the distance and the position between the endoscope body and a target stone can be accurately adjusted, the stone is accurately and thoroughly removed, and damage to a patient is reduced.

Drawings

FIG. 1 is an axial sectional view of the assembly structure of the visual puncture dilator and the optical fiber endoscope of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an axial cross-sectional view of a visual puncture dilator of the present invention;

FIG. 4 is an enlarged view of FIG. 3 at B;

fig. 5 is a perspective view of the middle introducer needle of the present invention;

fig. 6 is an axial sectional view of the middle introducer needle of the present invention;

FIG. 7 is a perspective view of the structure of the middle sheath of the present invention;

FIG. 8 is an axial cross-sectional view of the structure of the middle sheath of the present invention;

FIG. 9 is a perspective view of the structure of the middle sheath of the present invention;

fig. 10 is an axial sectional view of the structure of the middle sheath of the present invention;

FIG. 11 is a front view of a fiber optic endoscope according to the present invention;

FIG. 12 is a perspective view of a bendable endoscope at the distal end of the present invention;

FIG. 13 is an axial cross-sectional view of a distal end bendable endoscope of the present invention;

FIG. 14 is an axial cross-sectional view of the flexible endoscope and fiber optic endoscope assembly of the present invention;

wherein, 1-guide needle (1.1-guide needle pipe joint, 1.2-guide pipe section, 1.3-puncture needle pipe section, 1.4-optical fiber endoscope joint, 1.5-taper transition pipe section, 1.6-water injection channel joint), 2-outer sheath pipe, 3-inner sheath pipe, 4-outer sheath pipe joint, 5-inner sheath pipe joint (5.1-first inner sheath pipe joint ring platform, 5.2-second inner sheath pipe joint ring platform), 6-taper guide pipe, 7-guide sleeve, 8-drainage cavity, 9-positioning ring platform, 10-guide sleeve inner hole, 11-first limit ring platform, 12-second limit ring platform, 13-drainage pipe joint, 14-step platform, 15-sealing ring, 16-anti-rotation boss, 17-first ring platform positioning groove, 18-boss positioning groove, 19-second ring platform positioning groove, 20-optical fiber endoscope, 21-head end endoscope (21.1-endoscope handle, 21.2-hard sheath section, 21.3-semi-hard sheath section, 21.4-soft sheath section, 21.5-deflector rod, 21.6-instrument channel, 21.7-image channel, 21.8-water injection channel, 21.9-traction steel wire, 21.10-steel wire wheel).

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments.

The combined endoscope with the visual expansion function and the accurate positioning of the head end as shown in fig. 1-14 comprises a guide needle 1, an outer sheath tube 2 and an inner sheath tube 3 coaxially inserted into the outer sheath tube, wherein one end of the outer sheath tube 2 is coaxially connected with an outer sheath tube joint 4, one end of the inner sheath tube 3 is coaxially connected with an inner sheath tube joint 5, and the outer sheath tube joint 4 is matched and fixed with the inner sheath tube joint 5.

The guide needle 1 comprises a puncture needle coaxially inserted into an inner sheath pipe joint 5 and an outer sheath pipe joint 4, one end of the puncture needle is coaxially connected with a guide needle pipe joint 1.1, the guide needle pipe joint 1.1 is matched and fixed with the inner sheath pipe joint 5, the puncture needle comprises a guide pipe section 1.2 coaxially arranged in an inner sheath pipe 3 and a puncture needle pipe section 1.3 coaxially communicated with the front end of the guide pipe section 1.2 and positioned outside the inner sheath pipe 3, the front end of the puncture needle pipe section is a sharp end, an optical fiber endoscope joint 1.4 coaxially communicated with the guide pipe section 1.2 and used for inserting an optical fiber endoscope 20 is arranged on the guide needle pipe joint 1.1, and the side part of the guide needle pipe joint 1.1 is connected with a water injection channel joint 1.6 communicated with the guide pipe section 1.2. The puncture needle tube section 1.3 is a straight tube with a tip at the front end and a diameter smaller than that of the guide tube section 1.2, and a conical transition tube section 1.5 is connected between the rear end of the puncture needle tube section 1.3 and the front end of the guide tube section 1.2. The front end of the inner sheath tube 3 is coaxially connected with a conical guide tube 6 matched with the conical transition tube section 1.5,

a cavity communicated with the outer sheath pipe 2 is arranged in the outer sheath pipe joint 4 along the axial direction, a guide sleeve 7 is coaxially fixed in the cavity, the cavity between the guide sleeve 7 and the outer sheath pipe 2 is a drainage cavity 8 capable of guiding out water and secretion, and a positioning ring platform 9 which is coaxially communicated with the guide sleeve 7 and is matched and fixed with the inner sheath pipe joint 5 is fixed on the rear surface of the outer sheath pipe joint 4. The inside guide sleeve hole 10 that is of guide sleeve 7, be provided with first spacing ring platform 11 on the front end pore wall of guide sleeve hole 10, the aperture of first spacing ring platform 11 is less than the diameter of hard sheath section 21.2. The inner hole 10 of the guide sleeve can guide the hard sheath section 21.2 of the bendable endoscope 21 at the head end to move axially, the first limit ring table 11 can limit the axial forward movement position of the hard sheath section 21.2, the outer sheath pipe joint 4 is vertically connected with a drainage pipe joint 13 communicated with the drainage cavity 8, and the surface of the drainage pipe joint 13 is provided with a plurality of steps 14 matched with the drainage pipe along the axial direction. The rear end of the guide sleeve 7 penetrates through the outer sheath pipe joint 4 and is arranged in the positioning ring table 9, a sealing ring installation groove is formed in the inner wall of the rear end of the guide sleeve 7, a second limiting ring table 12 is arranged on the inner wall of the positioning ring table 9, a sealing ring 15 is fixed in a space defined by the second limiting ring table 12 and the sealing ring installation groove, and the sealing ring 15 can be matched with the surface of the hard sheath section 21.2 to prevent water and secretion from flowing out of the rear end of the outer sheath pipe joint 4.

An anti-rotation boss 16 is coaxially fixed on the surface of the positioning ring platform 9, the inner sheath pipe joint 5 comprises a first inner sheath pipe joint ring platform 5.1 and a second inner sheath pipe joint ring platform 5.2 (the first inner sheath pipe joint ring platform 5.1 and the second inner sheath pipe joint ring platform 5.2 are of an integral structure), a space defined by the inner wall of the first inner sheath pipe joint ring platform 5.1 and the front end face of the second inner sheath pipe joint ring platform 5.2 is a ring platform positioning groove 17 matched with the positioning ring platform 9, a boss positioning groove 18 matched with the anti-rotation boss 16 is arranged on the inner wall of the first inner sheath pipe joint ring platform 5.1, and a second ring platform pipe joint positioning groove 19 matched with the second inner sheath ring platform 5.2 is arranged at the front end of the guide needle pipe joint 1.1.

As shown in fig. 12-14, the bendable endoscope 21 at the head end at least comprises a soft sheath section 21.4, and the bendable endoscope 21 at the head end is composed of a soft sheath section 21.4, a semi-hard sheath section 21.3 (made of plastic or hard rubber, and the like, and can be deformed to a certain extent), a hard sheath section 21.2, a shift lever 21.5, a traction steel wire 21.9 and a steel wire wheel 21.10 fixed with one end of the traction steel wire 21.9. Two channels are arranged in the soft sheath section 21.4, the semi-hard sheath section 21.3 and the hard sheath section 21.2, wherein one channel is communicated with the instrument channel 21.6, the image channel 21.7 and the water injection channel 21.8, and the other channel is used for the penetration of a traction steel wire 21.9. The wire wheel 21.10 is rotated by pulling the shift lever 21.5, so that the soft sheath section 21.4 and the semi-hard sheath section 21.3 can be bent through the traction wire 21.9, the traction wire 21.9 can drive the soft sheath section 21.4 to be bent under normal conditions, and the semi-hard sheath section 21.3 can be driven to be bent to increase the bending angle under the condition that the endoscope sheath tube needs to be bent greatly.

The utility model discloses a working process is: after the guide needle 1 is combined with an inner sheath (an inner sheath tube 3 and an inner sheath tube joint 5, the same below) and an outer sheath (an outer sheath tube 2 and an outer sheath tube joint 4, the same below), the optical endoscope 20 is inserted from the optical endoscope joint 1.4 of the guide needle 1 to the front end of a puncture needle tube section 1.3 to be combined into a visual puncture dilator. After the visual puncture dilator is assembled, puncture operation is carried out under the guidance of B-ultrasonic or X-ray, meanwhile, a puncture path is monitored through an image transmitted by the optical fiber endoscope 20, when the optical fiber endoscope 20 sees that the puncture needle pipe section 1.3 enters a target position, the optical fiber endoscope 20, the guide needle 1 and the inner sheath are withdrawn, and the outer sheath is reserved as a working channel. After the optical fiber endoscope 20 and the head end bendable endoscope 21 are assembled, the optical fiber endoscope enters a cavity from the outer sheath tube 2, the deflector rod 21.5 drives the outer sheath tube 2 to swing slightly to primarily search for stones, meanwhile, the parts of the corners which can not be reached by some outer sheath tubes 2 can be bent to accurately search for stones by extending out of the soft sheath sections 21.4 outside the outer sheath tube 2, holmium laser is guided into an instrument channel 21.6 to perform stone breaking operation, meanwhile, water is injected through a water injection channel 21.8 to wash the visual field of the optical fiber endoscope 20, a drainage tube of a negative pressure system is connected through a drainage tube connector 13, and water and crushed stones in the cavity are sucked out through a gap between the inner cavity of the outer sheath tube 2 and the sheath tube of the head end bendable endoscope 21.

The utility model discloses an outer sheath pipe 2 both can regard as the expansion passageway use of expander, by can regard as the guide channel that the soft sheath section 21.4 of guide got into the intracavity to use, still has the function of adjusting soft sheath section 21.4 bend radius simultaneously, can make the length that outer sheath pipe 2 was stretched out to soft sheath section 21.4 head end shorter to in operation driving lever 21.5 make the small swing of head end of soft sheath section 21.4 realize the accurate positioning to the treatment position.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all still fall within the scope of the technical solution of the present invention.

Claims (10)

1. The utility model provides a but combination formula endoscope with visual expansion function, head end accurate positioning which characterized in that: the guiding needle comprises a guiding needle (1), a sheath tube and a sheath tube joint coaxially connected with the rear end of the sheath tube, wherein the guiding needle (1) comprises a puncturing needle coaxially inserted into the sheath tube joint and the sheath tube, the rear end of the puncturing needle is coaxially connected with a guiding needle tube joint (1.1), the guiding needle tube joint (1.1) is matched and fixed with the sheath tube joint, the front end of the sheath tube is provided with a guiding structure which is matched with the front end of the puncturing needle and guides the puncturing needle to coaxially penetrate through the sheath tube, and a fiberscope channel coaxially communicated with the puncturing needle is arranged in the guiding needle tube joint (1.1); a soft sheath section (21.4) of the endoscope (21) with a bendable head end can be coaxially inserted into the sheath, and the head end of the soft sheath section (21.4) can pass through the sheath and be bent.

2. The combination endoscope with visual dilation and precisely positionable head end of claim 1, wherein: the puncture needle comprises a guide pipe section (1.2) coaxially arranged in the sheath pipe and a puncture needle pipe section (1.3) coaxially communicated with the front end of the guide pipe section (1.2) and positioned outside the sheath pipe, wherein the front end of the puncture needle pipe section is a pointed end, the inlet end of the fiberscope channel is fixedly provided with an optical fiber endoscope connector (1.4), and the other end of the sheath pipe is matched with and guides the front end of the guide pipe section (1.2) to coaxially penetrate through the puncture needle pipe section (1.3) and is provided with a guide structure of the sheath pipe.

3. The combination endoscope with visual dilation and precisely positionable head end of claim 2, wherein: the sheath tube comprises an outer sheath tube (2) and an inner sheath tube (3) coaxially inserted into the outer sheath tube, one end of the outer sheath tube (2) is coaxially connected with an outer sheath tube joint (4), the rear end of the inner sheath tube (3) is coaxially connected with an inner sheath tube joint (5), the outer sheath tube joint (4) is matched and fixed with the inner sheath tube joint (5), the guide needle tube is coaxially inserted into the inner sheath tube joint (5) and the inner sheath tube (3), the front end of the inner sheath tube (3) is provided with the guide structure, and the guide needle tube joint (1.1) is matched and fixed with the inner sheath tube joint (5); the soft sheath section (21.4) can be coaxially inserted into the outer sheath tube (2), and the head end of the soft sheath section (21.4) can penetrate through the outer sheath tube (2) and be bent.

4. A combined endoscope with visual dilation and precisely positionable head end according to claim 3, wherein: the puncture needle comprises a straight pipe, wherein the diameter of the puncture needle pipe section (1.3) is smaller than that of the guide pipe section (1.2), and a conical transition pipe section (1.5) is connected between the rear end of the puncture needle pipe section (1.3) and the front end of the guide pipe section (1.2); the guiding structure is a conical guiding pipe (6) which is coaxially connected to the front end of the inner sheath pipe (3) and matched with the conical transition pipe section (1.5).

5. A combined endoscope with visual dilation and precisely positionable head end according to claim 3, wherein: a cavity communicated with the outer sheath pipe (2) is formed in the outer sheath pipe joint (4) along the axial direction of the outer sheath pipe joint, a guide sleeve (7) for coaxially inserting a hard sheath section (21.2) of the head-end bendable endoscope (21) is fixed in the cavity, a drainage cavity (8) capable of guiding water and secretion out is formed in the cavity between the guide sleeve (7) and the outer sheath pipe (2), and a positioning ring table (9) coaxially communicated with the guide sleeve (7) and matched and fixed with the inner sheath pipe joint (5) is fixed on the rear surface of the outer sheath pipe joint (4).

6. The combination endoscope with visual dilation and precisely positionable head end of claim 5, wherein: the inner part of the guide sleeve (7) is a guide sleeve inner hole (10), a first limit ring platform (11) is arranged on the front end hole wall of the guide sleeve inner hole (10), and the aperture of the first limit ring platform (11) is smaller than the diameter of the hard sheath section (21.2).

7. The combination endoscope with visual dilation and precisely positionable head end of claim 5, wherein: the outer sheath pipe joint (4) is connected with a drainage pipe joint (13) communicated with the drainage cavity (8).

8. The combination endoscope with visual dilation and precisely positionable head end of claim 5, wherein: an anti-rotation boss (16) is coaxially fixed on the surface of the positioning ring platform (9), and a first ring platform positioning groove (17) matched with the positioning ring platform (9) and a boss positioning groove (18) matched with the anti-rotation boss (16) are arranged in the inner sheath pipe joint (5).

9. The combination endoscope with visual dilation and precisely positionable head end of claim 8, wherein: the inner sheath pipe joint (5) comprises a first inner sheath pipe joint ring platform (5.1) and a second inner sheath pipe joint ring platform (5.2) which is coaxially fixed on the inner surface of the rear end of the first inner sheath pipe joint ring platform (5.1) and integrated with the first inner sheath pipe joint ring platform (5.1), the space enclosed by the inner wall of the first inner sheath pipe joint ring platform (5.1) and the front end face of the second inner sheath pipe joint ring platform (5.2) is a ring platform positioning groove (17), the boss positioning groove (18) is formed in the inner wall of the first inner sheath pipe joint ring platform (5.1), and the second ring platform positioning groove (19) matched with the second inner sheath pipe joint ring platform (5.2) is formed in the front end of the guide needle pipe joint (1.1).

10. The combination endoscope with visual dilation and precisely positionable head end of claim 9, wherein: the side part of the guide needle tube joint (1.1) is connected with a water injection channel joint (1.6) communicated with the guide needle tube.

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