Ureter cold knife

Abstract

The utility model discloses a ureter cold knife, which comprises a handle, a push tube, a knife head and a clamping component, and one end of the push tube is connected with the handle; and the cutter head is connected with the other end of the push tube. A tool bit mounting groove is formed in one end, connected with the tool bit, of the push tube; an inserting part matched with the tool bit mounting groove is arranged on the tool bit; the inserting part is suitable for being inserted into the tool bit mounting groove; the clamping assembly comprises a spring pin and a clamping piece, wherein the spring pin is movably arranged on the inserting part of the tool bit; a locking hole matched with the spring pin is formed in the cutter head mounting groove in the push pipe; the spring pin is suitable for being embedded into the locking hole so as to lock the cutter head on the push tube; and the unlocking key is arranged on the locking hole of the push tube in a limiting manner, and the unlocking key is provided with an extension part extending out of the push tube. The device can cut off narrow and locked scars in the ureter, reconstruct a follow-up treatment channel and relieve upper urinary tract obstruction.

Description

Technical Field

[0001] The utility model relates to a ureteral cold knife and belongs to the technical field of medical equipment. Background Art

[0002] At present, ureteral stenosis is a common urinary system disease with a relatively complex etiology, including long-term incarceration of ureteral stones, iatrogenic ureteral injury (such as surgery, holmium laser, radiotherapy) and trauma. Once the ureter is stenotic, it will seriously affect the normal excretion of urine, leading to symptoms such as abdominal pain, hematuria, and decreased renal function. In severe cases, acute kidney injury, hydronephrosis and renal failure may even occur, greatly affecting the patient's quality of life.

[0003] After searching the prior art, it was found that the Chinese patent with publication number CN213588421U disclosed a non-invasive clamp for partial ureterectomy and anastomosis, which uses a hollow part to provide a suture base surface, and then continues to complete the remaining sutures, thereby speeding up the operation as much as possible. However, there are risks of high surgical difficulty and secondary restenosis during use. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide a ureteral cold knife, which can cut the stenotic and atretic scar in the ureter, rebuild the subsequent treatment channel, and relieve the obstruction of the upper urinary tract.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: a ureteral cold knife, comprising:

[0006] handle;

[0007] A push tube, one end of which is connected to the handle;

[0008] A cutter head connected to the other end of the push tube;

[0009] One end of the push tube connected to the cutter head is provided with a cutter head mounting groove;

[0010] The cutter head is provided with a plug-in portion adapted to the cutter head mounting groove;

[0011] The plug-in portion is suitable for being inserted into the cutter head mounting slot.

[0012] A clamping assembly, the clamping assembly comprising:

[0013] A spring pin, the spring pin being movably arranged on the plug-in portion of the cutter head;

[0014] The cutter head mounting groove on the push tube is provided with a locking hole matching the spring pin;

[0015] The spring pin is adapted to be embedded in the locking hole to lock the cutter head on the push tube;

[0016] An unlocking button, the unlocking button being limitedly arranged on the locking hole of the push tube, and the unlocking button being provided with an extending portion extending out of the push tube;

[0017] The unlocking button is suitable for being pressed to abut against the spring pin.

[0018] Furthermore, in order to facilitate the connection between the handle and the push tube, the handle and the push tube are connected by gluing.

[0019] Furthermore, two specific types of push tubes are provided, wherein the push tubes are stainless steel hoses or medical PVC tubes.

[0020] Furthermore, in order to facilitate the connection between the cutter head and the push tube, the cutter head and the push tube are connected by gluing or welding.

[0021] Furthermore, in order to realize the detachable connection between the cutter head and the push tube, a cutter head mounting groove is provided on one end of the push tube connected to the cutter head;

[0022] The cutter head is provided with a plug-in portion adapted to the cutter head mounting groove;

[0023] The plug-in portion is suitable for being inserted into the cutter head mounting slot.

[0024] Further, in order to lock the blade head in the push tube, the ureteral cold knife also includes a clamping assembly, and the clamping assembly includes:

[0025] A spring pin, the spring pin being movably arranged on the plug-in portion of the cutter head;

[0026] The cutter head mounting groove on the push tube is provided with a locking hole matching the spring pin;

[0027] The spring pin is adapted to be embedded in the locking hole to lock the cutter head on the push tube;

[0028] An unlocking button, the unlocking button being limitedly arranged on the locking hole of the push tube, and the unlocking button being provided with an extending portion extending out of the push tube;

[0029] The unlocking button is suitable for being pressed to abut against the spring pin.

[0030] Furthermore, in order to ensure accurate alignment of the spring pin and the locking hole, a circumferential limiting protrusion is provided on the plug-in portion of the cutter head;

[0031] A guide groove matched with the circumferential limiting protrusion is correspondingly provided on the inner wall of the cutter head mounting groove of the push tube.

[0032] Furthermore, two specific structures of the cutter heads are provided. The cutter heads are of a diamond structure or an elliptical structure, and two cutting edges are symmetrically arranged on both sides of the diamond structure or the elliptical structure.

[0033] Furthermore, a specific structure of a cutter head is provided, wherein the cutter head is a semicircular structure and is provided with a cutting edge arranged along a semicircular outer arc surface.

[0034] Furthermore, two specific structures of the cutter heads are provided, wherein the cutter heads are spiral structures or conical structures.

[0035] By adopting the above technical solution, the utility model has the following beneficial effects:

[0036] In the present invention, minimally invasive surgical techniques are adopted. Through the working channel F4-5 of the standard ureteroscope, the doctor can manually operate the blade to cut the narrow and blocked ureter, reconstruct the channel through balloon dilation, and relieve the obstruction of the upper urinary tract. When cutting the narrow part, the cutting direction also varies according to the different narrow parts in clinical practice, and attention is paid to the damage to the blood supply of the ureter, finally avoiding greater medical risks.

[0037] In addition, in order to ensure the connection between the cutter head and the push tube, a circumferential limit protrusion is provided on the plug-in part of the cutter head, so that when the cutter head is inserted into the installation groove, the matching spring pin and locking hole can be locked without error, and the convenience of operation is increased. An unlocking button is also designed on the push tube to abut against the spring pin, so as to achieve the purpose of convenient unlocking.

[0038] In summary, the ureteral cold knife of the utility model relieves upper urinary tract obstruction, greatly reduces the medical risks during the operation, improves the success rate of treatment, and is beneficial to the patient's recovery. At the same time, the clinical use of the ureteral cold knife avoids the problem of ureteral restenosis caused by the thermal damage to the ureteral wall caused by holmium laser treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The three-dimensional structure of the ureteral cold knife of the utility model is shown in FIG. Figure 1 ;

[0040] for Figure 1 A partial enlarged view of the middle A part;

[0041] The three-dimensional structure of the ureteral cold knife of the utility model is shown in FIG. Figure 2 ;

[0042] for Figure 3 A partial enlarged view of part B in the middle;

[0043] (a)-5 (d) is a schematic diagram of the structure of the blade head of the ureteral cold knife of the present invention. DETAILED DESCRIPTION

[0044] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0045] Embodiment 1: Figure 1 -5, a ureteral cold knife, comprising:

[0046] Handle 100;

[0047] A push tube 200, one end of which is connected to the handle 100;

[0048] The cutter head 300 is connected to the other end of the push tube 200 .

[0049] In this embodiment, if Figure 1 , Figure 3 As shown, minimally invasive surgical techniques are used, and through the working channel F4-5 of the standard ureteroscope, the doctor can manually operate the blade head 300 to cut the stenotic and closed scar. The channel is reconstructed by balloon dilation to relieve the obstruction of the upper urinary tract. The stenotic site is cut. Clinically, the incision direction varies according to the different stenotic sites, and attention is paid to the damage to the blood supply of the ureter, and finally a greater medical risk is avoided. At the same time, the ureteral cold knife is used clinically to avoid the thermal damage to the ureteral wall caused by holmium laser treatment, which leads to the problem of restenosis of the ureter. In addition, it lays the foundation for the subsequent treatment options, such as the placement of ureteral stents and the placement of allium coated metal ureteral stents. The blade head 300 can be made of stainless steel.

[0050] Specifically, Figure 1-3 As shown, the push tube 200 and the cutter head 300 can also be connected in the following manner: a cutter head mounting groove is provided on one end of the push tube 200 connected to the cutter head 300;

[0051] The cutter head 300 is provided with a plug-in portion 310 adapted to the cutter head mounting groove;

[0052] The plug-in portion 310 is suitable for being inserted into the cutter head mounting slot;

[0053] In this embodiment, if Figure 1-3 As shown, the shape of the cutter head installation groove can be a circular shape, a square shape, or the like, which matches the plug-in portion 310. The size of the cutter head installation groove should be closely matched with the plug-in portion 310, so that the cutter head 300 can be firmly plugged into the push tube 200. The cutter head installation groove and the matching plug-in portion 310 realize a reliable detachable connection between the cutter head 300 and the push tube 200, which is conducive to the replacement of the cutter head 300 and expands the scope of application.

[0054] Specifically, Figure 1-3As shown, the ureteral cold knife also includes a clamping assembly, and the clamping assembly can be the following structure:

[0055] A spring pin, which is movably disposed on the plug-in portion 310 of the cutter head 300;

[0056] The cutter head mounting groove on the push tube 200 is provided with a locking hole matching the spring pin;

[0057] The spring pin is adapted to be inserted into the locking hole to lock the cutter head 300 on the push tube 200;

[0058] An unlocking button 210, which is limitedly disposed on the locking hole of the push tube 200, and has an extending portion extending out of the push tube 200;

[0059] The unlock button 210 is adapted to be pressed to abut against the spring pin.

[0060] In this embodiment, if Figure 1-3 As shown, in order to ensure that the cutter head 300 is stably fixed on the push tube 200, a clamping assembly is provided. The clamping assembly prevents the cutter head 300 from being separated from the push tube 200 during use. During assembly, the plug-in portion 310 of the cutter head 300 is inserted into the cutter head mounting groove of the push tube 200, and the spring pin is embedded in the locking hole, so as to achieve the locking and fixing of the cutter head 300 and the push tube 200. On the basis of the clamping assembly, a corresponding unlocking structure is also designed. When the cutter head 300 needs to be unlocked, the unlocking button 210 is pressed so that it abuts against the spring pin embedded in the locking hole through the locking hole. At this time, the unlocking button 210 can be used to disengage the spring pin from the locking hole to complete the unlocking of the cutter head 300 and the push tube 200. This unlocking structure is easy to operate and can achieve the rapid separation of the cutter head 300 without damaging the clamping assembly.

[0061] Specifically, Figure 1-4 As shown, a circumferential limiting protrusion 320 is provided on the plug-in portion 310 of the cutter head 300;

[0062] A guide groove matching the circumferential limiting protrusion 320 is correspondingly provided on the inner wall of the cutter head mounting groove of the push tube 200 .

[0063] In this embodiment, if Figure 4 As shown, the purpose of providing the circumferential limiting protrusion 320 and the guide groove is to ensure the correct matching of the clamping assembly, so that the spring pin can accurately match the locking hole and limit the circumferential rotation of the cutter head 300.

[0064] Specifically, Figure 1 and Figure 3As shown, the handle 100 and the push tube 200 are connected by gluing; a plug hole is provided on the handle 100, and the push tube 200 is inserted into the plug hole and connected by gluing; in this embodiment, glue is placed in the plug hole, the push tube 200 is inserted into the plug hole, and then cured to achieve the connection between the handle 100 and the push tube 200.

[0065] Specifically, in some embodiments, Figure 1 and Figure 3 As shown, the push tube 200 can be a medical PVC tube.

[0066] In certain embodiments, such as Figure 1 and Figure 3 As shown, the push tube 200 can also be made of a stainless steel hose, that is, a spring tube instead of a medical PVC tube. It is generally recommended to use a medical PVC tube as much as possible as a disposable clinical device.

[0067] Specifically, Figure 1 and Figure 3 As shown, the cutter head 300 is a diamond-shaped structure, and two cutting edges are symmetrically arranged on both sides of the diamond-shaped structure.

[0068] In some embodiments, as shown in FIG. 5( c ), the cutter head 300 may also be an elliptical structure or a circular structure, and two cutting edges are symmetrically arranged on two sides of the elliptical structure or the circular structure.

[0069] In some embodiments, as shown in FIG. 5( b ), the cutter head 300 may also be a semicircular structure, and the cutter head 300 is provided with a cutting edge arranged along the semicircular outer arc surface. The cutter head 300 may also be a spiral structure.

[0070] In some embodiments, as shown in FIG. 5( d ), the cutting head 300 may also be a conical structure, and the tip and both sides of the conical structure are provided with cutting edges that can be used for cutting.

[0071] Embodiment 2: This embodiment is basically the same as Embodiment 1, except for the connection method between the cutter head 300 and the push tube 200.

[0072] Specifically, Figure 1 and Figure 3 As shown in Fig. 5 (a) to Fig. 5 (d), the blade head 300 and the push tube 200 are connected by gluing, and of course, they can also be connected by welding or fusion. The gluing connection method is specifically: the blade head 300 is inserted into the blade head hole on the push tube 200, and then they are glued together, which is similar to the gluing between the handle 100 and the push tube 200.

[0073] In this embodiment, if Figure 1 and Figure 3 As shown, the adhesive connection or the welding connection can also provide a certain sealing effect to prevent body fluids and the like from entering the handle 100, thereby ensuring cleanliness and hygiene.

[0074] Embodiment 3: The structure of this embodiment is basically the same as that of embodiment 1, except that: the connection between the cutter head 300 and the push tube 200 of this embodiment can be fixed in the form of a screw thread, that is, the cutter head 300 is provided with an external thread section, and the push tube 200 is provided with an internal thread section. The cutter head 300 and the push tube 200 are threadedly connected through the cooperation of the external thread section and the internal thread section, which makes it convenient for the doctor to replace the cutter head 300 during surgery. In addition, when selling, the cutter head 300 is generally fixed to the handle 100, and various cutter heads 300 are added to form a kit.

[0075] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A ureteral cold knife, characterized in that: include: handle(100); A push tube (200), one end of which is connected to the handle (100); A cutter head (300), the cutter head (300) being connected to the other end of the push tube (200); One end of the push tube (200) connected to the cutter head (300) is provided with a cutter head mounting groove; The cutter head (300) is provided with a plug-in portion (310) adapted to the cutter head mounting groove; The plug-in portion (310) is suitable for being inserted into the cutter head mounting slot; A clamping assembly, the clamping assembly comprising: a spring pin, the spring pin being movably arranged on the plug-in portion (310) of the cutter head (300); The cutter head mounting groove on the push tube (200) is provided with a locking hole matching the spring pin; The spring pin is suitable for being embedded in the locking hole to lock the cutter head (300) on the push tube (200); An unlocking button (210), the unlocking button (210) being limitedly disposed on the locking hole of the push tube (200), the unlocking button (210) being provided with an extension portion extending out of the push tube (200); The unlocking button (210) is suitable for being pressed to abut against the spring pin.

2. The ureteral cold knife according to claim 1, characterized in that: The handle (100) and the push tube (200) are connected by gluing.

3. The ureteral cold knife according to claim 1, characterized in that: The push tube (200) is a stainless steel hose or a medical PVC tube.

4. The ureteral cold knife according to claim 1, characterized in that: The cutter head (300) and the push tube (200) are connected by gluing or welding.

5. The ureteral cold knife according to claim 1, characterized in that: A circumferential limiting protrusion (320) is provided on the inserting portion (310) of the cutter head (300); A guide groove matching the circumferential limiting protrusion (320) is correspondingly provided on the inner wall of the cutter head mounting groove of the push tube (200).

6. The ureteral cold knife according to claim 1, characterized in that: The cutter head (300) is a diamond-shaped structure, an elliptical structure or a circular structure, and two cutting edges are symmetrically arranged on both sides of the diamond-shaped structure, the elliptical structure or the circular structure.

7. The ureteral cold knife according to claim 1, characterized in that: The cutter head (300) is a semicircular structure, and the cutter head (300) is provided with a cutting edge arranged along a semicircular outer arc surface.

8. The ureteral cold knife according to claim 1, characterized in that: The cutter head (300) is a spiral structure or a conical structure.

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