Bendable percutaneous nephroscope

Abstract

The utility model relates to a bendable percutaneous nephroscope. The bendable percutaneous nephroscope comprises a bending part, an insertion part and a limiting part, the head end of the bending part is fixedly connected with the end part, the bending part can rotate, and a traction steel wire penetrates through the bending part; the two ends of the insertion part are fixedly connected with the tail end of the bending part and the handle respectively, a capillary is connected into the insertion part, and the traction steel wire penetrates through the capillary; the handle comprises a rotating part and a driving lever, the driving lever controls the rotating part to rotate, and the rotating part winds or unwinds the traction steel wire; the limiting part axially moves in the rotating axis direction of the rotating part and is used for limiting rotation of the rotating part, and when the limiting part is located at the first working position, the rotating part is limited and fixed; and when in the second working position, the rotating part is unlocked. The bending part can rotate within a certain angle range, the percutaneous nephroscope does not need to swing by a large angle, the wound surface can be prevented from being too large, and the bleeding risk is reduced. When the bending part rotates to a certain angle, the traction steel wire is limited through the limiting part.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to a flexible percutaneous nephroscope. Background Art

[0002] Percutaneous nephrolithotomy is a procedure that involves creating a puncture channel from the skin to the kidney at the waist, then inserting a percutaneous nephroscope through the expanded channel, and using ultrasound, laser and other technologies to crush and remove the kidney stones. During the operation, it is necessary to observe the location and shape of the stones in order to accurately crush and remove them. At present, electronic percutaneous nephroscopes in the prior art generally use a rigid endoscope end, which is a linear metal rigid nephroscope with a small viewing angle. In specific surgical operations, when the stones are widely distributed or hidden, they have certain limitations.

[0003] Authorization announcement number: CN 207152578 U, application date: 2016.12.12, utility model name: an electronic percutaneous nephroscope, this utility model relates to the field of medical device technology, specifically to an electronic percutaneous nephroscope. It includes a percutaneous nephroscope outer tube, the insertion end of the percutaneous nephroscope outer tube is provided with a camera assembly, the camera assembly is connected to a display arranged outside the electronic percutaneous nephroscope, the camera assembly includes a camera and an illumination light source for providing light to the camera, and the size of the camera is 1mm×1mm. The utility model provides an electronic percutaneous nephroscope with clear shooting images and a small percutaneous nephroscope outer tube.

[0004] In the above prior art, the insertion end of the percutaneous nephroscope is a hard endoscope, which cannot be bent. It is difficult to find stones in parallel calyces or other blind spots. If the insertion angle is forcibly changed, it may cause kidney tissue damage and prolong the operation time. Utility Model Content

[0005] In view of the fact that the front end of the prior art percutaneous nephroscope is not bendable and cannot treat stones in blind spots, the purpose of the utility model is to provide a bendable percutaneous nephroscope.

[0006] The technical solution provided by the utility model is:

[0007] A flexible percutaneous nephroscope, comprising:

[0008] A bending part, the head end of which is fixedly connected to the end head; the bending part is rotatable, and a traction wire is passed through the inside of the bending part;

[0009] An insertion part, the two ends of which are fixedly connected to the end of the bending part and the handle respectively; a capillary is connected inside the insertion part, and the traction wire is inserted into the capillary;

[0010] The handle includes a rotating part and a lever fixedly connected to the rotating part. The lever controls the rotation of the rotating part, and the rotating part winds or unwinds a traction wire.

[0011] It further includes a limiting part which can move axially along the rotation axis direction of the rotating part and is used to limit the rotation of the rotating part. The limiting part has two working positions. When in the first working position, the rotating part is limited and fixed; when in the second working position, the rotating part is unlocked.

[0012] Further, the rotating part includes a V-shaped notch part and an annular turntable part. The turntable part is recessed inward along the circumferential direction to form a recessed part, and the recessed part is used to guide the traction wire.

[0013] Further, a second through hole is provided on the upper end surface of the notch part, and a first through hole is provided on the recessed part close to the notch part. The end of the traction wire sequentially passes through the first through hole and the second through hole and is fixed in a fixed disk, and the fixed disk is fixedly installed on the inner side surface of the rotating part.

[0014] Further, when the limiting part is in the first working position, it abuts against the outer wall of the fixed disk.

[0015] Further, two fixed disks are provided and are located on the same side of the rotating part. Two traction wires are provided, and each traction wire is respectively connected to a fixed disk. The traction wires are used to control the double bending of the bending part.

[0016] Further, the handle includes a left housing and a right housing symmetric to the left housing. The lever is provided on the outer wall of the left housing, and the rotating part is correspondingly provided inside the left housing.

[0017] Further, the limiting part includes a bolt, and the right housing is provided with a threaded hole adapted to the bolt, and the axis of the threaded hole coincides with the rotation axis of the rotating part.

[0018] Further, the bending part includes a first end snake bone joint, a plurality of intermediate snake bone joints and a tail end snake bone joint which are sequentially rotationally connected. The first end snake bone joint is provided with a first slot hole, and the end head part includes a convex part which is adapted to the slot hole.

[0019] Further, the capillary tube is fixed to the inner wall of the insertion part and extends to the tail end snake bone joint. The tail end snake bone joint is provided with a second slot hole for fixing the capillary tube. The tail end snake bone joint is inserted into the groove part at the front end of the insertion part. The wall thickness of the groove part is smaller than the wall thickness of the rest of the insertion part.

[0020] Further, the end head part includes an extension part, and the convex part is closely attached to the outer wall of the extension part. The outer diameter of the extension part is adapted to the inner diameter of the first end snake bone joint.

[0021] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0022] The bending part of the present utility model can rotate within a certain angle range. When the position of the stone is hidden or scattered, it is not necessary to swing the percutaneous nephroscope at a large angle. The bending part can be rotated by controlling it through the handheld part to achieve exploration and stone extraction, which can avoid excessive wound surface and reduce the risk of bleeding. When the bending part needs to be fixed after rotating to a certain angle, it is necessary to limit the traction wire that controls the rotation of the bending part to keep it in a locked state. Therefore, a limiting part is designed to limit the traction wire.

[0023] In addition, when the end head is connected to the bending part, the convex part provided on the end head is adapted to the first slot provided on the bending part to form an anti-misassembly design to avoid incorrect installation of the end head. A groove part is provided at the front end of the insertion part, and the groove part is adapted to the end of the bending part, which is conducive to realizing the connection between the bending part and the insertion part. Description of the Drawings

[0024] Figure 1 Schematic diagram of the overall structure of a percutaneous nephroscope in an embodiment of the present application;

[0025] Figure 2 Schematic diagram of the overall structure of a percutaneous nephroscope from another angle in an embodiment of the present application;

[0026] Figure 3 Schematic cross-sectional view of the handle in an embodiment of the present application;

[0027] Figure 4 Schematic diagram of the structure of the rotating part in an embodiment of the present application;

[0028] Figure 5 Schematic diagram of the structure of the rotating disk and the limiting part in an embodiment of the present application;

[0029] Figure 6 Schematic cross-sectional view of the bending part in an embodiment of the present application;

[0030] Figure 7 Schematic diagram of the capillary structure in an embodiment of the present application;

[0031] Figure 8 Schematic diagram of the front end of the insertion part in an embodiment of the present application;

[0032] Figure 9 Schematic diagram of the structure of the end head and the bending part in an embodiment of the present application.

[0033] Explanation of the reference numerals in the schematic diagrams:

[0034] End head 1, convex part 11, extension part 12;

[0035] Bending part 2, first end snake bone joint 21, middle snake bone joint 22, tail end snake bone joint 23, traction wire 24, first slot 211, second slot 231;

[0036] Insertion part 3, groove part 31, capillary tube 32;

[0037] Handle 4, rotating part 41, lever 42, left housing 43, right housing 44, fixed disk 411, recessed part 412, notch part 413, first through hole 414, second through hole 415;

[0038] Limiting part 5. Specific implementation manner

[0039] To further understand the content of the present utility model, the present utility model will be described in detail with reference to the drawings and embodiments.

[0040] The structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limited conditions for the implementation of the present invention. Therefore, they do not have technical essential significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the efficacy that the present invention can produce and the purpose that can be achieved, should still fall within the scope that the technical content disclosed by the present utility model can cover. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for the convenience of clear narration and are not used to limit the scope of implementation. The change or adjustment of their relative relationship, without substantial change in the technical content, should also be regarded as the scope that the present invention can implement.

[0041] Percutaneous nephrolithotomy is mainly a surgical method for clearing stones in the renal collecting system and / or ureter by establishing an artificial channel from the skin to the renal collecting system and inserting an endoscope and lithotripsy and stone extraction instruments through the channel. Percutaneous nephrolithotomy is applicable to: kidney stones larger than 2 cm, kidney stones smaller than 2 cm that are ineffective for extracorporeal lithotripsy or accompanied by obvious hydronephrosis, and some upper ureteral stones.

[0042] Percutaneous nephrolithotomy has the advantages of small injury, light pain, thorough stone extraction, and rapid recovery. The incision in the waist is usually less than 1 cm. Since the muscle is not cut, it not only does not affect the appearance, but also has almost no impact on the labor force after the operation. Usually, the patient can be discharged 2 to 3 days after the operation. Compared with laparoscopic lithotripsy, percutaneous nephrolithotomy has less impact on the kidney and surrounding structures and does not affect subsequent various kidney surgeries. Compared with extracorporeal lithotripsy, it has a short treatment cycle, immediate effect, and less impact on renal function.

[0043] A bendable percutaneous nephroscope of the present application, as Figure 1As shown, it includes an end portion 1, a bending portion 2, an insertion portion 3, a handle 4 and a limiting portion 5.

[0044] The end portion 1 is fixedly connected to the head end of the curved portion 2, and the end portion 1 is used to fix the clamp channel tube and the camera assembly. The clamp channel tube is a channel for crushing or removing stones. The camera assembly includes an image sensor and an LED light source. The image sensor includes a high-resolution camera system and an optical lens, which can provide clear and realistic images to help doctors more accurately determine the location, size and shape of stones. The LED light source provides an illumination source for the image sensor to increase the visual range of the image sensor.

[0045] like Figure 6 As shown, a traction wire 24 is inserted into the interior of the bending portion 2. Preferably, two traction wires 24 are provided to enable the bending portion 2 to bend in both directions. Figure 7 As shown, the bending portion 2 includes a head end snake bone joint 21, a plurality of middle snake bone joints 22 and a tail end snake bone joint 23 which are rotatably connected in sequence. The head end snake bone joint 21 and the end portion 1 have a mutually compatible fool-proof design. The head end snake bone joint 21 is provided with a first slot hole 211, and the end portion 1 is provided with a protrusion 11 which is compatible with the first slot hole 211. The two cooperate to ensure that the end portion 1 will not be installed incorrectly.

[0046] like Figure 9 As shown, the end portion 1 includes an extension portion 12, the protrusion 11 is tightly attached to the outer wall of the extension portion 12, and the outer diameter of the extension portion 12 is adapted to the inner diameter of the head end serpentine joint 21, thereby increasing the fit between the end portion 1 and the head end serpentine joint.

[0047] According to the needs of the operation, the middle snake bone segment 22 can adopt a variable pitch, that is, the length of the middle snake bone segment 22 increases in sequence along the direction of extension from the head end to the tail end, and the short pitch position of the snake bone is softer than the long pitch position, and will bend from the short pitch position first after being stressed, so the human body sweeping area is small, reducing the pain caused to the patient. Of course, according to the needs of the operation, the stone position is shallow and the stone removal is not difficult, and the length of the middle snake bone segment 22 can also be the same.

[0048] like Figures 6 to 8 As shown, a capillary 32 is fixedly connected to the inner wall of the insertion portion 3, and the capillary 32 extends to the tail end snake bone joint 23. A second slot 231 is provided on the tail end snake bone joint 23 for fixing the capillary 32. A traction wire 24 is passed through the capillary 32, and the traction wire 24 is provided with a guiding and supporting function.

[0049] In order to better connect the tail end serpentine joint 23 with the front end of the insertion part 3, the front end of the insertion part 3 is a groove part 31, and the wall thickness of the groove part 31 is smaller than the wall thickness of the rest of the insertion part 3. The tail end serpentine joint 23 is inserted into the groove part 31, and the tail end serpentine joint 23 is fixedly connected to the insertion part by gluing or welding.

[0050] As Figure 3 , Figure 4 shown, the end of the insertion part 3 is fixedly connected to the handle 4. The handle 4 includes a rotating part 41 and a lever 42. The lever 42 is fixedly connected to the rotating part 41, and the lever 42 controls the rotation of the rotating part 41. The rotating part 41 is used for winding or unwinding the traction wire 24 to achieve the purpose of bending the bending part 2.

[0051] The limiting part 5 moves axially along the rotation axis direction of the rotating part 41 to limit the rotation of the rotating part 41. The limiting part 5 has two working positions. When it is in the first working position, the rotating part 41 is limited and fixed. When it is in the second working position, the rotating part 41 is unlocked. The purpose of limiting is to fix the bending angle of the bending part 2 without generating small deviations, because percutaneous nephrolithotomy is a delicate operation. Some stones are small in size or very hidden in location. If the angle cannot be fixed or even swings left and right, the surgical difficulty will increase.

[0052] More specifically, as Figure 4 , Figure 5 shown, the rotating part 41 includes a V-shaped notch part 413 and a turntable part. The turntable part is recessed inward in the circumferential direction to form a recessed part 412. The recessed part 412 is used to guide the traction wire 24, and because the recessed part 412 is recessed inward, the traction wire 24 will not slip or deviate.

[0053] A second through hole 415 is provided on the upper end surface of the notch part 413, and a first through hole 414 is provided in the recessed part 412 close to the notch part 413. The end of the traction wire 24 passes through the first through hole 414, exits from the second through hole 415, and is then fixed in the fixed disk 411. The fixed disk 411 is fixedly installed on the inner side surface of the rotating part 41.

[0054] There are two fixed disks 411 and they are located on the same side of the rotating part 41. Therefore, two first through holes 414 and two second through holes 415 need to be provided, so that each traction wire 24 passes through the corresponding first through hole 414 and second through hole 415 in sequence and is connected to the corresponding fixed disk 411.

[0055] Both the first through hole 414 and the second through hole 415 are symmetrically arranged. The notch part 413 is V-shaped, which can make the two second through holes 415 located on one of the V-shaped sides respectively. When the two traction wires 24 pass through the two second through holes 415, they can maintain an appropriate distance and will not interfere with each other.

[0056] Each V-shaped edge of the notch portion 413 is a smooth plane, and the fixed disk 411 is arranged close to the notch portion 413. At the same time, the top of the fixed disk 411 and the V-shaped edge are located in the same horizontal plane. A notch is set at the top of the fixed disk 411 at the corresponding position of the second through hole 415, so that the traction wire 24 can be smoothly inserted into the notch after passing through the second through hole 415. This not only makes the path for the traction wire 24 to be fixed in the fixed disk 411 as short as possible, but also prevents the traction wire 24 from slipping.

[0057] When the limiting part 5 is in the first working position, it abuts against the outer walls of the two fixed disks 411 and also abuts against the turntable part, and the rotating part 41 is then limited and fixed. The outer walls of the two fixed disks 411 are restrained and limited by the limiting part 5 at the same time, which can achieve the best limiting effect.

[0058] The handle 4 includes a left housing 43 and a right housing 44 symmetrical to the left housing 43. The left housing 43 and the right housing 44 are combined to form the handle 4. The lever 42 is arranged on the outer wall of the left housing 43, and the rotating part 41 is correspondingly arranged inside the left housing 43. The limiting part 5 is installed on the right housing 44.

[0059] The lever 42 and the limiter 5 are respectively located on the left and right sides of the handle 4 to avoid mutual interference during operation and greatly increase the operating space. When the medical staff rotates the lever 42 to rotate the bending part 2 to a certain angle, they need to continue to hold the lever 42 to ensure the angle is stable, and the lever 42 can be released only after the rotation part 4 is limited by the limiter 5 on the other side.

[0060] If the lever 42 and the limiting portion 5 are located on the same side, one of the components must be operated with the backhand, which unnecessarily increases the difficulty of the operation.

[0061] Preferably, the limiting portion 5 is a bolt, and the right shell 44 is provided with a threaded hole matched with the bolt. The limiting portion 5 is installed in the threaded hole, and the axis of the threaded hole coincides with the rotation axis of the rotating portion 41. When the bolt is screwed until it abuts against the fixed plate 411 and the turntable portion at the same time, the bending angle of the bending portion 2 is locked, and the next surgical step can be performed.

[0062] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A flexible percutaneous nephroscope, comprising: A bending portion (2), the head end of which is fixedly connected to the end portion (1); the bending portion (2) is bendable, and a traction steel wire (24) is inserted into the interior of the bending portion (2); An insertion part (3), the two ends of which are fixedly connected to the end of the bending part (2) and the handle (4) respectively; a capillary tube (32) is connected inside the insertion part (3), and the traction wire (24) is inserted into the capillary tube (32); Features: The handle (4) comprises a rotating part (41) and a lever (42) fixedly connected to the rotating part (41), wherein the lever (42) is used to control the rotation of the rotating part (41), and the rotating part (41) is used to reel in or unreel the traction wire (24); The invention also comprises a limiting portion (5), which is capable of axially moving along the rotation axis direction of the rotating portion (41); the limiting portion (5) has two working positions, and when in the first working position, the rotating portion (41) is limited and fixed; when in the second working position, the rotating portion (41) is unlocked.

2. A flexible percutaneous nephroscope according to claim 1, characterized in that: The rotating portion (41) comprises a V-shaped notch portion (413) and an annular turntable portion; the turntable portion is concave inwardly along the circumferential direction to form a concave portion (412), and the concave portion (412) is used to guide the traction wire (24).

3. A flexible percutaneous nephroscope according to claim 2, characterized in that: The upper end surface of the notch portion (413) is provided with a second through hole (415), and the recessed portion (412) close to the notch portion (413) is provided with a first through hole (414); The end of the traction steel wire (24) passes through the first through hole (414) and the second through hole (415) in sequence and is then fixed in the fixed disk (411), and the fixed disk (411) is fixedly mounted on the inner side of the rotating part (41).

4. A flexible percutaneous nephroscope according to claim 3, characterized in that: The fixed disks (411) are provided with two and are located on the same side of the rotating part (41); Two traction steel wires (24) are provided, each traction steel wire (24) is connected to a fixing plate (411) respectively, and the traction steel wire (24) is used to control the bidirectional bending of the bending portion (2).

5. A flexible percutaneous nephroscope according to claim 4, characterized in that: When the limiting portion (5) is located at the first working position, it abuts against the outer wall of the fixing plate (411).

6. A flexible percutaneous nephroscope according to claim 5, characterized in that: The handle (4) comprises a left shell (43) and a right shell (44) symmetrical to the left shell (43); the lever (42) is arranged on the outer wall of the left shell (43), and the rotating part (41) is correspondingly arranged inside the left shell (43).

7. A flexible percutaneous nephroscope according to claim 6, characterized in that: The limiting portion (5) comprises a bolt, and the right housing (44) is provided with a threaded hole matched with the bolt, and the axis of the threaded hole coincides with the rotation axis of the rotating portion (41).

8. The flexible percutaneous nephroscope according to claim 1, characterized in that: The curved portion (2) comprises a head end snake bone segment (21), a plurality of middle snake bone segments (22) and a tail end snake bone segment (23) which are rotatably connected in sequence; The head end snake bone joint (21) is provided with a first slot hole (211), and the end portion (1) comprises a protruding portion (11), and the protruding portion (11) is adapted to the slot hole (211).

9. A flexible percutaneous nephroscope according to claim 8, characterized in that: The capillary tube (32) is fixed to the inner wall of the insertion portion (3) and extends to the tail end snake bone joint (23), and the tail end snake bone joint (23) is provided with a second slot (231) for fixing the capillary tube (32); The tail end snake bone joint (23) is inserted into the groove portion (31) at the front end of the insertion portion (3); the wall thickness of the groove portion (31) is smaller than the wall thickness of the rest of the insertion portion (3).

10. The flexible percutaneous nephroscope according to claim 8, characterized in that: The end portion (1) comprises an extension portion (12), and the protrusion (11) is tightly attached to the outer wall of the extension portion (12); the outer diameter of the extension portion (12) is adapted to the inner diameter of the head end serpentine joint (21).

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