Ureteral endo-incision knife

Abstract

The utility model belongs to the technical field of medical apparatus and instruments, specifically relates to a ureteroscope inner incision knife, including outer sheath group, drive group and blade group, be provided with drive group in the outer sheath group, drive group left end fixed connection blade group, the left end upside of outer sheath group is set up the gap slot, blade group is correspondingly set with the gap slot, and blade group exposes outside the outer sheath group through the gap slot. The utility model discloses when using, using the thin ureteroscope of F6 / 7.5, places outer sheath group 1 into the operation channel of ureteroscope, hides ureteroscope inner incision knife head, when the ureteroscope reaches narrow place ureter, pushes the first cutter axle seat on push rod in cutter groove and approaches second cutter axle seat through rotating handle, guarantees two blade pieces to be able to rotate stably around the activity axle at this time, makes the blade piece can adjust the depth of ureter inner incision according to the individual need, reaches more accurate incision, reduces the damage to surrounding tissue, protects the safety of patient during operation.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically, it relates to a ureteroscopic incision knife, and more particularly to a ureteroscopic incision knife with a concealed blade and adjustable height. Background Technology

[0002] Ureteral stricture is a common disease of the urinary system, mostly caused by stones, infection, surgical injury, or congenital factors, and can lead to serious consequences such as hydronephrosis and kidney damage. Traditional open surgery for ureteral stricture is invasive and has a slow recovery, and is now rarely used. With the development of minimally invasive techniques, ureteroscopic internal incision has gradually become the mainstream, with holmium laser and cold knife being the commonly used tools. Holmium laser internal incision uses the thermal effect of high-energy laser to vaporize or cut the stricture tissue. Because its fiber is thin, it can be placed within the operating channel of an F6 / 7.5 fine ureteroscope, making it easy to reach the stricture. However, holmium laser can easily cause thermal damage to surrounding tissues, leading to surgical failure. Ureteroscopic cold knife internal incision can handle long strictures (≥2cm) that are difficult to address with holmium laser, and is safer for patients with severe periureteral adhesions. Because the cold knife directly cuts the stricture tissue, postoperative scarring is less, and the success rate is higher, especially for patients with recurrent strictures requiring secondary surgery. Cold knife internal incision eliminates the risk of thermal damage, avoiding the ureteral perforation or damage to surrounding tissues that may occur with holmium lasers, and reducing the risk of iatrogenic stricture. Furthermore, cold knife internal incision does not require complex laser equipment, making it suitable for widespread adoption in basic hospitals, and the surgical cost is significantly lower than that of laser treatment.

[0003] However, the ureteroscopic endoscopic cold knife currently used in clinical practice has a non-concealable blade and requires an F8 / 9.8 large-caliber ureteroscope for insertion. The larger ureteroscope increases the difficulty of insertion and makes it harder to reach the narrowed areas of the upper ureter, thus limiting the application of cold knife endoscopic incision. To overcome the shortcomings of existing ureteroscopic cold knives, we have invented this ureteroscopic endoscopic knife with a concealed blade and adjustable height. Utility Model Content

[0004] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a ureteroscopic intraoperative incision knife.

[0005] According to the present invention, a ureteroscopic endoscopic incision knife includes an outer sheath assembly, a drive assembly, and a blade assembly. The drive assembly is disposed inside the outer sheath assembly, and the blade assembly is fixedly connected to the left end of the drive assembly. A notch is opened on the upper side of the left end of the outer sheath assembly, and the blade assembly is disposed corresponding to the notch, and the blade assembly is exposed on the outside of the outer sheath assembly through the notch.

[0006] In a preferred embodiment: the outer sheath assembly consists of an outer sheath and a sleeve, the outer sheath being a hollow cylinder, and the right end of the outer sheath being connected to the sleeve.

[0007] In a preferred embodiment: a sliding cavity is provided inside the outer sheath, and a cutting groove is provided on the left side of the outer sheath. The cutting groove communicates with the sliding cavity, and the cutting groove is correspondingly arranged with the blade assembly.

[0008] In a preferred embodiment, the drive assembly consists of a push rod, a stop rod, a return spring, and a rotary handle.

[0009] In a preferred embodiment: the push rod is slidably disposed in the sliding cavity, the abutment is slidably disposed in the sleeve, and the push rod and the abutment are fixedly connected.

[0010] In a preferred embodiment: the abutment is fitted with a return spring, which fixes the rotating handle to the bottom of the sleeve, and the rotating handle is fixedly installed on the right end of the abutment.

[0011] In a preferred embodiment: the blade assembly includes a first blade shaft seat, a second blade shaft seat, a shaft, blades, and a movable shaft.

[0012] In a preferred embodiment: two centrally symmetrical blades are rotatably mounted on the movable shaft, the opening direction of the blades is consistent with the orientation of the notch groove, the first blade shaft seat and the second blade shaft seat are rotatably connected to the two blades respectively, and the front and rear ends of the first blade shaft seat and the second blade shaft seat are fixed with shafts, and the first blade shaft seat is fixedly connected to the push rod.

[0013] In a preferred embodiment: a sliding groove is formed on both the front and rear walls of the right end of the tool groove, and the shaft on the first tool shaft seat slides in correspondence with the sliding groove.

[0014] In a preferred embodiment: fixing holes are provided on both the front and rear walls of the left end of the tool groove, and the fixing holes are used for limiting the rotation of the shaft of the second tool shaft seat.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In use, this invention employs an F6 / 7.5 thin ureteroscope. The outer sheath assembly 1 is inserted into the operating channel of the ureteroscope, concealing the ureteroscope's internal cutting blade. When the ureteroscope reaches the narrowed ureter, rotating the handle pushes the first blade shaft seat on the push rod towards the second blade shaft seat within the blade groove. This ensures that the two blades can rotate stably around the movable axis, allowing the blades to adjust the depth of the ureteral incision according to individual needs, achieving more precise incision, reducing damage to surrounding tissues, and protecting the patient's intraoperative safety. Attached Figure Description

[0017] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the outer sheath assembly of this utility model;

[0020] Figure 3 This is a schematic diagram of the drive assembly and blade assembly of this utility model;

[0021] In the picture:

[0022] Detailed Implementation

[0023] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0024] like Figures 1-3 As shown, this utility model discloses a ureteroscopic endoscopic incision knife, including an outer sheath assembly 1, a drive assembly 2, and a blade assembly 3. The drive assembly 2 is disposed inside the outer sheath assembly 1, and the blade assembly 3 is fixedly connected to the left end of the drive assembly 2. A notch groove 4 is opened on the upper side of the left end of the outer sheath assembly 1, and the blade assembly 3 is disposed corresponding to the notch groove 4. The blade assembly 3 is exposed on the outside of the outer sheath assembly 1 through the notch groove 4.

[0025] The outer sheath assembly 1 consists of an outer sheath 101 and a sleeve 102. The outer sheath 101 is a hollow cylinder. The right end of the outer sheath 101 is connected to the sleeve 102, which is used to accommodate and limit the stop rod 202 and the return spring 203. A sliding cavity is provided inside the outer sheath 101. A cutting groove 103 is provided on the left side of the outer sheath 101. The cutting groove 103 communicates with the sliding cavity and is correspondingly provided with the blade assembly 3. Sliding grooves 104 are provided on the front and rear walls of the right end of the cutting groove 103. The sliding grooves 104 are used to limit the sliding of the shaft 303 on the first cutter shaft seat 301. Fixing holes 105 are provided on the front and rear walls of the left end of the cutting groove 103. The fixing holes 105 are used to limit the rotation of the shaft 303 on the second cutter shaft seat 302.

[0026] The drive assembly 2 consists of a push rod 201, a stop rod 202, a return spring 203, and a rotary handle 204. The push rod 201 is slidably disposed in the slide cavity, and the stop rod 202 is slidably disposed in the sleeve 102. The push rod 201 and the stop rod 202 are fixedly connected. The stop rod 202 is covered with a return spring 203. The return spring 203 fixes the rotary handle 204 to the bottom of the sleeve 102. The elastic deformation capability of the return spring 203 is used to limit the sliding stroke of the push rod 201. The rotary handle 204 is fixedly installed on the right end of the stop rod 202.

[0027] The blade assembly 3 includes a first blade shaft seat 301, a second blade shaft seat 302, a shaft 303, blades 304, and a movable shaft 305. Two centrally symmetrical blades 304 are rotatably mounted on the movable shaft 305. The opening direction of the blades 304 is consistent with the orientation of the notch groove 4. The first blade shaft seat 301 and the second blade shaft seat 302 are rotatably connected to the two blades 304 respectively. The first blade shaft seat 301 and the second blade shaft seat 302 are both fixed with shafts 303 at their front and rear ends. The shaft 303 on the first blade shaft seat 301 slides correspondingly with the slide groove 104. The first blade shaft seat 301 is fixedly connected to the push rod 201. The shaft 303 on the second blade shaft seat 302 is correspondingly set with the fixing hole 105. By pushing the first blade shaft seat 301 towards the second blade shaft seat 302 through the push rod 201, the two blades 304 will rotate around the movable shaft 305, so that the blades 304 can adjust the depth of the ureteral incision according to individual needs.

[0028] Working principle

[0029] In use, this invention involves inserting the outer sheath assembly 1 into the narrow part of the ureter using the F6 / 7.5 narrow ureteroscope operating channel. Rotating the handle 204 pushes the first blade shaft seat 301 on the push rod 201 to move towards the second blade shaft seat 302 within the blade groove 103. The shaft 303 on the first blade shaft seat 301 slides directionally within the slide groove 104, ensuring that the two blades 304 can rotate stably around the movable shaft 305. This allows the blades 304 to adjust the depth of the incision inside the ureter according to individual needs, achieving a more precise incision.

[0030] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A ureteroscopic endoscopic incision knife, characterized in that, It includes an outer sheath assembly (1), a drive assembly (2) and a blade assembly (3). The drive assembly (2) is provided inside the outer sheath assembly (1). The blade assembly (3) is fixedly connected to the left end of the drive assembly (2). A notch groove (4) is opened on the upper left side of the outer sheath assembly (1). The blade assembly (3) is correspondingly arranged with the notch groove (4). The blade assembly (3) is exposed on the outside of the outer sheath assembly (1) through the notch groove (4).

2. The ureteroscopic incision knife according to claim 1, characterized in that, The outer sheath assembly (1) consists of an outer sheath (101) and a sleeve (102). The outer sheath (101) is a hollow cylinder, and the right end of the outer sheath (101) is connected to the sleeve (102).

3. The ureteroscopic incision knife according to claim 2, characterized in that, The outer sheath (101) has a sliding cavity inside, and a knife groove (103) is opened on the left side of the outer sheath (101). The knife groove (103) is connected to the sliding cavity, and the knife groove (103) is correspondingly arranged with the blade assembly (3).

4. The ureteroscopic incision knife according to claim 3, characterized in that, The drive assembly (2) consists of a push rod (201), a stop rod (202), a return spring (203), and a rotating handle (204).

5. The ureteroscopic incision knife according to claim 4, characterized in that, The push rod (201) is slidably disposed in the sliding cavity, and the abutment rod (202) is slidably disposed in the sleeve (102). The push rod (201) and the abutment rod (202) are fixedly connected.

6. The ureteroscopic incision knife according to claim 5, characterized in that, The push rod (202) is covered with a return spring (203), which fixes the rotating handle (204) to the bottom of the sleeve (102). The rotating handle (204) is fixedly installed on the right end of the push rod (202).

7. The ureteroscopic incision knife according to claim 6, characterized in that, The blade assembly (3) includes a first blade shaft seat (301), a second blade shaft seat (302), a shaft (303), a blade (304), and a movable shaft (305).

8. The ureteroscopic incision knife according to claim 7, characterized in that, Two centrally symmetrical blades (304) are rotatably mounted on the movable shaft (305). The opening direction of the blades (304) is consistent with the orientation of the notch (4). The first blade shaft seat (301) and the second blade shaft seat (302) are rotatably connected to the two blades (304) respectively. The front and rear ends of the first blade shaft seat (301) and the second blade shaft seat (302) are fixed with shafts (303). The first blade shaft seat (301) is fixedly connected to the push rod (201).

9. The ureteroscopic incision knife according to claim 8, characterized in that, The right end of the cutter groove (103) has a sliding groove (104) on both the front and rear walls, and the shaft (303) on the first cutter shaft seat (301) slides in correspondence with the sliding groove (104).

10. The ureteroscopic incision knife according to claim 8, characterized in that, Fixing holes (105) are provided on the front and rear walls of the left end of the cutter groove (103). The fixing holes (105) are used to limit the rotation of the shaft (303) of the second cutter shaft seat (302).

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