Transvaginal uterus body crushing surgical instrument

Abstract

The utility model discloses a transvaginal uterus body crushing surgical instrument, which comprises a replaceable cutter head, a cutter bar and a cutter handle, the cutter head comprises a cutter head rod and a spiral blade, the front end face of the cutter head rod is in a closed blunt end shape, the spiral blade is of an annular spiral structure, the annular inner side edge of the spiral blade is spirally wound on the cutter head rod, and the cutter head rod is provided with an annular groove. The edge of the front end of the spiral blade is a first cutting edge, a rotary cutting channel is formed between the rear end of the spiral blade and the front end of the spiral blade, side blades are connected to the outer side edges of the front end and the rear end of the spiral blade, the edge of the front end of each side blade is a second cutting edge, and the cutter bar is further sleeved with a limiting baffle ring. The cutter handle is connected with the cutter handle rear end through a detachable structure. The replaceable cutter head is adopted, the spiral blade with the proper diameter can be selected according to the size of the uterus, the handle actively rotates and advances to enable the spiral blade to cut the center of the uterus in a rotary mode, the spiral blade can be conveniently pulled out, and the uterus losing the center of the uterus can collapse and shrink to be conveniently and smoothly taken out of the vagina.

Description

Technical Field

[0001] The utility model belongs to surgical instruments, in particular to a surgical instrument for morcellating the uterus through the vagina. Background Art

[0002] Clinically, after separation, the uterus is often too large (such as the patient's uterus itself is too large or suffers from a tumor, etc.), which causes the uterus to be unable to be directly removed from the vagina. The operator needs to gradually cut and remove it with a blade, thereby increasing the risk of vaginal wall damage and greatly prolonging the operation time. The difficulty in removing the uterus also limits the development of some laparoscopic surgeries. The patent application publication number CN104997554A discloses a tool for hysterectomy, which includes a handle and a cutter mounted on the handle. The cutter includes a back of the knife and at least one blade portion extending outward from the back of the knife for cutting the uterus. The blade portion is spirally arranged along the central axis with an angle α between the vertical axis of the handle, and the angle α is an obtuse angle. When using it, it needs to cooperate with surgical forceps, one hand holds the handle position of the tool and the tool is basically motionless, and the other hand uses surgical forceps to pull the uterus in a spiral direction along the spiral direction of the cutter, so that the entire uterus is cut into strips under the action of the blade portion, so that it can be removed from the vagina. However, this reverse passive excision method, which not only requires the cooperation of both hands but also pulls the uterus in a spiral, is not convenient and accurate in actual operation. For an oversized uterus, cutting it into strips for easy removal is not as simple and quick as imagined. In addition, the extremely sharp breakthrough tip formed by the blade at the top of its tool can easily pierce the uterine wall or end during insertion and excision, which can easily cause the risk of vaginal damage. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a transvaginal uterine body fragmentation surgical instrument, which can safely and quickly remove the internal part of the uterus and is conducive to the transvaginal removal of the uterine body.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A transvaginal uterine body fragmentation surgical instrument comprises a replaceable blade head, a blade rod and a blade handle. The replaceable blade head comprises a blade head rod and a spiral blade. The front end surface of the blade head rod is a closed blunt head shape. The rear end of the blade head rod is connected to the front end of the blade rod through a detachable structure. The spiral blade is an annular spiral structure. The annular inner side edge of the spiral blade is spirally wound on the blade head rod. The front end edge of the spiral blade is a first blade. A rotary cutting channel is formed between the rear end and the front end of the spiral blade. A side blade is connected to the outer side edge of the front end and the rear end of the spiral blade. The front end edge of the side blade is a second blade. A limit ring is also provided on the blade rod. The blade handle is connected to the rear end of the blade handle through a detachable structure.

[0006] The front end edge of the side blade is a beveled edge, and the second blade is formed on the beveled edge and is a serrated blade.

[0007] The knife rod is provided with a retaining ring axial position adjustment structure, which includes a plurality of spring pins arranged at different axial positions, and the limiting retaining ring has a pin hole matched with the spring pin.

[0008] The knife rod is provided with a length scale.

[0009] The detachable structure is a plug-in structure, and a spring pin is provided to match the pin hole.

[0010] The transvaginal uterine body morcellation surgical instrument of the utility model has the following advantages:

[0011] 1. The blunt-headed blade rod can be inserted into the cervix and open it, so that the spiral blade at the rear fits the front end of the uterus;

[0012] 2. With replaceable blades, you can choose a spiral blade with a suitable diameter according to the size of the uterus. The handle is actively rotated to make the spiral blade cut the center of the uterus and can be easily pulled out. The uterus without the center of the uterus will collapse and shrink, making it easier to remove from the vagina.

[0013] 3. The spiral blade is relatively stable during the rotation process. The setting of the limit ring can preset the screw-in length according to the length of the uterus under hysteroscopy, so as to effectively control the resection length. The blade rod adopts a blunt head design, which will not puncture the uterine wall or the end and damage the vagina, ensuring safe operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is described in detail below with reference to the accompanying drawings and specific implementation methods:

[0015] Figure 1 It is a three-dimensional schematic diagram of the transvaginal uterine body morcellation surgical instrument of the utility model;

[0016] Figure 2 It is an exploded schematic diagram of the transvaginal uterine body morcellation surgical instrument of the utility model;

[0017] Figure 3 It is a three-dimensional schematic diagram of another viewing angle of the transvaginal uterine body morcellation surgical instrument of the utility model;

[0018] Figure 4 It is a structural schematic diagram of the replaceable cutter head of the utility model. DETAILED DESCRIPTION

[0019] The utility model of the transvaginal uterine body fragmentation surgical instrument is as follows Figure 1-Figure 3As shown, it includes a replaceable cutter head 1, a cutter bar 2 and a cutter handle 3. Figure 4 As shown, the replaceable cutter head 1 includes a cutter head rod 11 and a spiral blade 12. The front end surface of the cutter head rod 11 is a closed blunt head shape. The rear end of the cutter head rod 11 is connected to the front end of the cutter rod 2 through a detachable structure. The detachable structure can be adopted as follows Figure 2 The plug-in structure shown in the figure is provided with a spring pin 13 on the rear end of the cutter head rod 11 inserted into the front end of the cutter rod 2 and matched with a pin hole 14 provided on the outer wall of the front end of the cutter rod 2. By pressing down the spring pin 13 and releasing the spring pin 13 to make it automatically pop out, the spring pin 13 can be withdrawn from or inserted into the pin hole 14, thereby realizing quick plug-in and replacement. Of course, other detachable structures such as threaded matching can also be used. The spiral blade 12 is an annular spiral structure, and the annular inner side of the spiral blade 12 is spirally wound on the cutter head rod 11, usually around one circle, and the front end edge of the spiral blade 12 is set as a first blade 15, and a rotary cutting channel 16 is formed between the rear end and the front end of the spiral blade 12, and a side blade 17 is connected to the outer side of the front end and the rear end of the spiral blade 12, and the front end edge of the side blade 17 is set as a second blade 18. As an embodiment, the front end edge of the side blade 17 can be designed as a bevel, and the second blade 18 is formed on the bevel and is a serrated blade to increase the screw-in cutting effect. The replaceable cutter head 1 can be designed into several 3-6cm outer diameters according to the different sizes of the spiral blade 12, and can be selected and used according to the size of the patient's uterus. The diameter of the knife bar 2 is the same as that of the knife head bar 11. A limit ring 21 is also sleeved on the knife bar 2. The outer diameter of the limit ring 21 should usually be larger than the uterine opening and is usually set at 1-4 cm. The length of the screw-in resection is controlled by sliding on the knife bar 2 and fixing the corresponding position. The knife handle 3 is also connected to the rear end of the knife handle 3 through a detachable structure, and the form is similar to that of the replaceable knife head 1. The detachability of the knife handle 3 can also facilitate the removal of the cut center of the uterus from the rear end of the knife bar 2.

[0020] The axial position adjustment structure of the limit stop ring 21 on the knife bar 2 can be achieved by setting a plurality of spring pins 13 at different axial positions of the knife bar 2, and the end of one side of the limit stop ring 21 also has a step, and the step is provided with a pin hole 14 that matches the spring pin 13. When the limit stop ring 21 slides to the corresponding position, it can be positioned by the spring pin 13. Of course, there is also a length scale on the knife bar 2, which can intuitively understand the screw-in length and the preset adjustment position of the limit stop ring 21. Of course, the sliding positioning of the limit stop ring 21 can also adopt other conventional forms.

[0021] The replaceable blade head 1, blade rod 2 and blade handle 3 can all be made of stainless steel, which is convenient for disinfection.

[0022] With the transvaginal uterine body fragmentation surgical instrument of the utility model, before fragmentation and removal of the uterus, the uterine blood vessels and ligaments have been pre-processed and severed, the uterus is in a free state, and under the hysteroscope, a replaceable blade head 1 of corresponding specifications is pre-selected, and the position of the limit ring 21 is adjusted. The assistant can use a vaginal retractor to pull the vagina to prevent damage, and at the same time, the instrument is inserted into the uterus through the vagina, and the blunt-headed blade rod 11 is inserted into the uterine ostium, the uterine ostium is slightly opened, and the spiral blade 12 is fitted with the front end surface of the uterus. At this time, the handle is rotated to make the second blade 18 inwardly rotate and cut from the front end surface of the uterus. At the same time, the assistant can fix the uterine body and fundus with non-destructive forceps under the laparoscope, which can ensure that no instrument perforation or surrounding tissue damage occurs during fragmentation. At the same time, after being cut by the first blade 15, the central part of the uterus passes into the rotary cutting channel 16 in a strip shape and rotates toward the rear of the spiral blade 12. As the spiral blade 12 continues to rotate and move forward, the central part of the uterus is continuously rotary cut and wound backward on the knife rod 2. When it is screwed in until the limit stop ring 21 approaches or stops at the uterine mouth, it stops moving forward, keeps in place and rotates one or two more circles, so that the central part of the uterus can be cut off and separated from the uterine body. At this time, the instrument is pulled out of the uterus and vagina as a whole by the handle, and the removed central part of the uterus can be taken out together with the spiral blade 12. After being broken up, the volume of the uterine body that loses the central part will be emptied and reduced, so that it can be taken out from the vagina.

[0023] However, those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A transvaginal uterine morcellation surgical instrument, characterized in that: It includes a replaceable cutter head, a cutter rod and a cutter handle. The replaceable cutter head includes a cutter head rod and a spiral blade. The front end face of the cutter head rod is a closed blunt head shape. The rear end of the cutter head rod is connected to the front end of the cutter rod through a detachable structure. The spiral blade is an annular spiral structure. The annular inner side edge of the spiral blade is spirally wound on the cutter head rod. The front end edge of the spiral blade is the first blade. A rotary cutting channel is formed between the rear end and the front end of the spiral blade, and a side blade is connected to the outer side edge of the front end and the rear end of the spiral blade. The front end edge of the side blade is the second blade. A limit ring is also provided on the cutter rod, and the cutter handle is connected to the rear end of the handle through a detachable structure.

2. A transvaginal uterine morcellation surgical instrument according to claim 1, characterized in that: The front end edge of the side blade is a beveled edge, and the second blade is formed on the beveled edge and is a serrated blade.

3. The transvaginal uterine morcellation surgical instrument according to claim 1, characterized in that: The knife rod is provided with a retaining ring axial position adjustment structure, which includes a plurality of spring pins arranged at different axial positions, and the limiting retaining ring has a pin hole matched with the spring pin.

4. A transvaginal uterine morcellation surgical instrument according to claim 3, characterized in that: The knife rod is provided with a length scale.

5. The transvaginal uterine morcellation surgical instrument according to claim 1, characterized in that: The detachable structure is a plug-in structure, and a spring pin is provided to match the pin hole.

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