Openable urethral incision knife

Abstract

The utility model discloses an expandable urethra incision knife which comprises a handle assembly, a catheter assembly and a blade assembly. Wherein the handle assembly comprises a first handle and a second handle which are hinged together; the catheter assembly comprises a hollow catheter and a traction piece arranged in the catheter. The blade assembly comprises a tooth-shaped blade and a blade protection piece hinged to the tooth-shaped blade. The tooth-shaped blade is more durable than a common blade, the sharp face is not prone to becoming blunt to affect the cutting effect, the blade assembly is provided with a one-way opening in combination with the blade protection piece, the cutting direction and depth can be conveniently controlled in the operation process, and urethra accidental injury is avoided; the spring assists in controlling the opening force of the first handle and the second handle, and in cooperation with the moving state of the blade assembly, damage of the blade to the endoscope body channel and the urethra can be reduced. According to the technical scheme, the defects that in the prior art, the operation failure rate is high, and the urethrostenosis re-occurrence rate is high are overcome.

Description

Technical Field

[0001] This utility model relates to the field of medical surgical instruments, and in particular to an openable urethral incision knife. Background Technology

[0002] Urethral stricture is a common clinical urological disease. Studies show that it can be caused by congenital, traumatic, and iatrogenic factors, such as hypospadias, epispadias, straddle injuries, or urethral procedures. In clinical practice, urethral dilation is usually used to treat urethral stricture. However, urethral dilation requires repeated procedures and is prone to restenosis, increasing the burden on patients. Due to the unique anatomy and function of the urethra, urethral stricture has always been one of the most challenging problems to manage in urology.

[0003] Existing open surgery methods have drawbacks such as difficulty in exposure, significant trauma, and postoperative complications including infection, urinary fistula, restenosis, and erectile dysfunction. In 1972, Sachse first applied direct-vision transurethral incision to treat urethral stricture. Due to its safety, convenience, fewer complications, lack of increased difficulty in secondary surgery, less postoperative pain, and shorter hospital stay, it has long been recommended as the preferred method for treating simple and some complex urethral strictures.

[0004] Another surgical instrument commonly used for urethral stricture is the holmium laser. For example, the technical solution disclosed in CN201332212Y uses a laser fiber to deliver the energy of the excitation light to the lesion, aiming to decompose the tissue. Practice shows that this type of surgical instrument inevitably causes thermal damage to the urethral wall when used for urethral stricture, leading to restenosis at the same site after surgery, requiring repeated internal incisions. This not only increases the difficulty of the surgery but also increases the burden on the patient.

[0005] In conclusion, there is still a need in clinical practice for a surgical instrument that can reduce the failure rate of surgery and the recurrence rate of urethral stricture. Utility Model Content

[0006] To overcome the shortcomings of existing technologies, this utility model provides an openable urethral incision knife, which overcomes the deficiencies of high surgical failure rate and high recurrence rate of urethral stricture in existing technologies.

[0007] An openable urethral incision knife includes: a handle assembly, a catheter assembly, and a blade assembly, wherein,

[0008] The handle assembly includes a first handle and a second handle hinged together, the hinge being the hinged end of the first handle and the second handle; the movable ends of the first handle and the second handle are located away from the hinged end; the movable ends of the first handle and the second handle are connected by a spring; both the first handle and the second handle have an inner cavity;

[0009] The catheter assembly includes a hollow catheter and a pulling member disposed within the hollow catheter; one end of the hollow catheter is fixed relative to the hinged end of the first handle; one end of the pulling member passes through the inner cavities of the first handle and the second handle, and is connected to the movable end of the second handle;

[0010] The blade assembly includes a toothed blade and a blade protection plate hinged to the toothed blade; the tail end of the blade protection plate is fixed relative to the other end of the hollow conduit, and the tail end of the toothed blade is fixed relative to the other end of the pulling member.

[0011] When the movable ends of the first and second handles are opened and closed by the spring, the toothed blade has an open state and a closed state relative to the protective plate.

[0012] Preferably, the toothed blade has its rack on the side opposite to the blade guard.

[0013] Preferably, the second handle is connected to the pulling member via a hinge.

[0014] Preferably, both the moving ends of the first handle and the second handle have anti-slip rings.

[0015] Preferably, the anti-slip ring of the second handle is also provided with a hand guard.

[0016] Preferably, the hollow conduit is set at a preset angle to the first handle.

[0017] The expandable urethral incision knife provided by this utility model has a toothed blade that is more durable than ordinary blades and is less likely to become dull, affecting the cutting effect. Combined with the blade protection plate, the blade assembly has a one-way opening, which makes it easy to control the cutting direction and depth during the operation and avoid accidental injury to the urethra. The opening force of the first and second handles is controlled by springs, which, together with the movement of the blade assembly, can reduce blade damage to the endoscope channel and urethra.

[0018] Compared with existing technologies, the expandable urethral incision knife provided by this utility model has a simple structure, is easy to use, and causes no thermal damage. It can effectively avoid restenosis and repeated incision. It can be reused after disinfection and can be applied to urethral and ureteral strictures according to the size and length of the endoscope channel. It avoids the defects of restenosis and repeated incision. It is suitable for endoscopic incision of urethral stricture sites under direct vision of ureteroscope or straight working channel urethroscope, which can effectively reduce medical costs and has good application prospects. Attached Figure Description

[0019] Figure 1 This is a schematic diagram (closed state) of the openable urethral incision knife in an embodiment of this utility model;

[0020] Figure 2 This is another schematic diagram (open state) of the expandable urethral incision knife in this embodiment of the present invention;

[0021] The markings in the accompanying drawings are as follows:

[0022] 1. First handle; 2. Second handle; 3. Hollow guide tube; 4. Pulling component; 5. Toothed blade; 6. Blade guard; 7. Spring; 8. Hinged end; 9. Movable end; 10. Anti-slip ring; 11. Hand guard. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] Provides a retractable urethral incision knife, such as Figure 1 , 2 As shown, it includes: a handle assembly, a catheter assembly, and a blade assembly, wherein:

[0025] The handle assembly includes a first handle 1 and a second handle 2 hinged together, the hinge being located at the hinge end 8 of the first handle and the second handle; the movable end 9 of the first handle and the second handle is located away from the hinge end; the movable ends of the first handle and the second handle are connected by a spring 7; both the first handle and the second handle have an inner cavity.

[0026] The catheter assembly includes a hollow catheter 3 and a pulling member 4 disposed inside the hollow catheter; one end of the hollow catheter is fixed relative to the hinged end of the first handle; one end of the pulling member passes through the inner cavities of the first handle and the second handle, and is connected to the movable end of the second handle.

[0027] The blade assembly includes a toothed blade 5 and a blade guard 6 hinged to the toothed blade; the tail end of the blade guard is fixed relative to the other end of the hollow conduit, and the tail end of the toothed blade is fixed relative to the other end of the pulling member.

[0028] The first and second handles move relative to each other, and the opening and closing force is controlled by a spring. A pulling element moves the toothed blade relative to the blade protector, thus allowing the toothed blade to be in an open or closed state relative to the protector. In use, in its natural state, the toothed blade is closed and the spring is stretched; when the toothed blade is open, the spring is compressed. This design allows the toothed blade to close immediately when the handles are released, preventing damage to the urethra.

[0029] Specifically, the handle assembly is made of metal, such as stainless steel; the first and second handles are hinged together, resembling scissors; the internal cavities of the first and second handles facilitate the insertion of the pulling component. The pulling component can be a steel wire with hooks at both ends, with the two hooks respectively connected to the movable end of the second handle and the end of the toothed blade; the specific structure of the pulling component is not limited to this. The blade protector has a double layer for easy storage of the toothed blade; when the toothed blade is in the closed state, part of its main body is stored inside the blade protector.

[0030] Furthermore, the toothed blade has its teeth on the side opposite to the blade protector. When the toothed blade is closed, the blade protector can reduce blade damage to the endoscope channel and urethra.

[0031] Furthermore, the second handle is connected to the pulling member via a hinge. Understandably, the connection method between the pulling member and the second handle is not limited to this.

[0032] Furthermore, both the first and second handles have anti-slip rings 10 on their movable ends for easy gripping during surgery; even further, a hand guard 11 is provided on the anti-slip ring of the second handle for easier operation.

[0033] Furthermore, the hollow catheter and the first handle are set at a preset angle; for example, 120°, 135°, etc., to be set according to the needs of the surgery.

[0034] The above is a description of the technical solution of this utility model, which is used to help understand this utility model; however, the implementation of this utility model is not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the principle of this utility model shall be considered as equivalent substitutions and shall be included within the protection scope of this utility model.

Claims

1. An openable urethrotome, characterized by, The utility model relates to a handle assembly, a catheter assembly and a blade assembly, wherein, the handle assembly comprises a first handle and a second handle hinged together at a hinge end of the first handle and the second handle; the first handle and the second handle have a movable end away from the hinge end; the movable end of the first handle and the second handle is connected by a spring; the first handle and the second handle each have an inner cavity; the catheter assembly comprises a hollow catheter and a pulling member arranged in the hollow catheter; one end of the hollow catheter is fixed opposite to the hinge end of the first handle; one end of the pulling member passes through the inner cavities of the first handle and the second handle and is connected to the movable end of the second handle; the blade assembly comprises a toothed blade and a blade protection piece hinged to the toothed blade; the tail end of the blade protection piece is fixed opposite to the other end of the hollow catheter, and the tail end of the toothed blade is fixed opposite to the other end of the pulling member; when the movable end of the first handle and the second handle is opened and closed by the spring, the toothed blade has an open state and a closed state relative to the protection piece. the toothed blade has a rack on the side away from the blade protection piece.

2. The expandable urethral knife according to claim 1, wherein the connection between the second handle and the pulling member is connected by a hinge.

3. The expandable urethral knife according to claim 1, wherein the movable end of the first handle and the second handle each has an anti-slip ring.

4. The expandable urethral incision knife as described in claim 1, characterized in that, the anti-slip ring of the second handle is further provided with a hand guard.

5. The expandable urethral incision knife as described in claim 4, characterized in that, the hollow catheter is arranged at a preset angle with the first handle.

6. The expandable urethral incision knife as described in any one of claims 1 to 5, characterized in that, ​

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