CN111887905A - Biopsy forceps for digging living tissue - Google Patents

Abstract

The invention discloses a biopsy forceps for digging out living tissue, which belongs to the technical field of medical instruments. A biopsy forceps used for digging out living tissue of the present invention includes a biopsy forceps main body, a movable rod of the biopsy forceps body can move back and forth along the fixed rod, and a digging hole disposed at the front end of the movable rod. A knife, the front end of the digging knife has a blade that can dig into the body of the patient; when the main body of the biopsy forceps makes the moving rod move forward, the moving rod will drive the digging knife to move forward, and the digging knife makes a digging action , used to excavate living tissue. By adopting the biopsy forceps for digging out living tissue of the present invention, when the main body of the biopsy forceps makes the moving rod move forward, the moving rod will drive the digging knife to move forward, and the digging action of the digging knife realizes the digging action of the digging knife in the patient's body. By digging up the living tissue, the collection of the living tissue can be effectively realized, and the collection amount of the living tissue can be increased, thereby improving the accuracy of the biopsy inspection result.

Description

A biopsy forceps for digging out living tissue

technical field

The invention relates to a biopsy forceps for excavating living tissue, belonging to the technical field of medical instruments.

Background technique

Biopsy is the abbreviation of "biopsy examination", also known as surgical pathological examination, which refers to the technology of removing diseased living tissue from the patient's body, such as cutting, clamping or puncturing, and performing pathological examination according to the needs of diagnosis and treatment.

Biopsy forceps are an indispensable tool for removing diseased living tissue, and there are a large number of designs in the prior art. For example, Chinese patents: a cervical biopsy forceps (publication number CN203861275U), a suction biopsy forceps set (publication number CN204723104U), a new type of biopsy forceps (publication number CN207341776U), a disposable biopsy forceps (publication number CN209332124U), etc. .

In recent years, with the development of my country's economy and society, the incidence of various types of tumors has been increasing year by year. In actual clinical work, as the gold standard for the diagnosis of bone tumors, tuberculosis and other diseases, it is necessary to obtain some diseased living tissues and conduct pathological tissue testing to confirm the diagnosis. The methods of obtaining the diseased living tissue currently mainly include open surgical excision and percutaneous biopsy. Percutaneous biopsy is a minimally invasive procedure with little damage to the patient's body, and is currently the most commonly used biopsy method. However, the current orthopaedic biopsy tools are single, biopsy forceps, biopsy needles, etc., because of the straight-through sampling method, the operating space is relatively small, the actual collection volume is small, and the effect is not ideal, resulting in a high negative rate of biopsy results, and the test results are often inaccurate. affect the diagnosis and treatment of patients.

Therefore, there is an urgent need for a new design of a biopsy forceps for excavating living tissue, which can increase the amount of living tissue collected, thereby improving the accuracy of biopsy.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a biopsy forceps for excavating living tissue in view of the above-mentioned problems. The present invention can increase the amount of living tissue collected and improve the accuracy of biopsy inspection results.

The technical scheme adopted in the present invention is as follows:

A biopsy forceps for digging out living tissue, comprising a biopsy forceps main body, a movable rod of the biopsy forceps main body can move back and forth along its fixed rod, and a digging knife arranged at the front end of the movable rod, so The front end of the digging knife has a blade that can dig into the patient's body; when the main body of the biopsy forceps makes the moving rod move forward, the moving rod will drive the digging knife to move forward, and the digging knife makes a digging action to use Excavate living tissue.

In the biopsy forceps of the present invention, the movable rod of the biopsy forceps body can move back and forth along the fixed rod of the biopsy forceps body, and the specific structure of the biopsy forceps body can be designed with reference to the prior art. Thanks to the design of the digging knife set at the front end of the moving rod, the front end of the digging knife has a cutting edge that can dig into the patient's body; when the biopsy forceps body moves the moving rod forward, the moving rod will drive the digging knife to move forward , through the digging action of the digging knife to dig out the living tissue on the patient's body. Compared with the biopsy forceps in the prior art, the existing biopsy forceps either clamp the living tissue through the opening and closing of the jaws, or cut the living tissue through the jaws of the scissors. It can be applied when the operating space is large; however, in a narrow operating space, the existing biopsy forceps are difficult to apply, and it is very difficult to collect living tissue. Even if the amount of living tissue that can be collected is very small, it will seriously affect Accuracy of biopsy results. The biopsy forceps of the present invention realizes the digging of living tissue through the forward movement of the digging knife and the digging action, which can effectively realize the collection of living tissue and increase the collection amount of living tissue, thereby improving biopsy inspection. accuracy of results.

Further, the digging knife is made of a hard material that can produce elastic deformation, and is generally arc-shaped in a free state; the front end of the fixed rod is longer than the front end of the movable rod.

Further, when the main body of the biopsy forceps makes the moving rod move forward, the moving rod drives the digging knife to move forward, and the digging knife will perform a protruding digging action to dig out living tissue. At this time, the digging knife Roughly arc-shaped; when the main body of the biopsy forceps moves the moving rod backward, the moving rod drives the digging knife to move backward, the digging knife will retract, and the digging knife will be elastically deformed and pressed on the digging knife. The position of the front end of the top surface of the fixed rod. Since the digging knife is made of a hard material that can produce elastic deformation, it is roughly arc-shaped in a free state, and the front end of the fixed rod is longer than the front end of the movable rod. When the digging knife is retracted, the digging knife can be elastically deformed and pressed against the front end position of the top surface of the fixed rod, so as to prepare for the next extension and digging operation. When the digging knife performs a protruding digging action, the digging knife can gradually recover to a substantially arc shape, so as to realize the protruding and digging action of the digging knife.

Preferably, the front end of the top surface of the fixed rod is protruded upward with a boss. When this design is adopted, when the moving rod is moved backward through the main body of the biopsy forceps and the digging knife is retracted, the digging knife will be elastically deformed and pressed on the boss of the fixed rod.

Further, the inner arc wall of the digging knife has a concave cavity. The cavity can accommodate the living tissue, so that the digging knife can reliably dig the living tissue.

Further, the side of the digging knife has a cutting edge. One side of the digging knife may have a blade, or both sides of the digging knife may have a blade. The lateral cutting edge of the digger is called the side cutting edge. The action of digging out the living tissue is mainly realized by its front blade, and the front blade can cut the root of the living tissue, which is conducive to the separation of the living tissue from the patient's body. The design purpose of the side blade is: when the biopsy forceps digs into the patient's body through the front blade of the digger, after the digger digs the living tissue to be collected, and then rotates the digger through the biopsy forceps, the side blade of the digger will cut In the circumferential direction of the living tissue, under the cutting action of the front and side blades of the excavator, the living tissue is directly separated from the patient's body, so that the excavator can reliably dig out the living tissue.

Further, the digging knife includes a connected blade body and a blade handle, the blade body is substantially arc-shaped, and the blade edge is disposed on the blade body. The blade of the digging knife is used to dig out the living tissue, and the handle of the digging knife is connected to the moving rod of the biopsy forceps.

Optionally, the digging knife and the moving rod are of separate structures, and the digging knife is detachably connected to the front end of the moving rod. It is convenient to replace the digging knife, and the purpose of one digging knife can be realized.

Optionally, the digging knife and the moving rod are integral structures. That is, the digging knife and the movable rod are connected in a non-detachable manner, for example, the digging knife and the movable rod are connected by welding, or the digging knife and the movable rod are integrally formed into a structure.

Optionally, the fixed rod includes a fixed rod body and a detachable end connected to the front end of the fixed rod body. It will be convenient to replace the end, and the purpose of one end of the end can be achieved.

To sum up, due to the adoption of the above-mentioned technical solutions, the beneficial effects of the present invention are:

The biopsy forceps of the present invention is used for digging out living tissue. When the main body of the biopsy forceps makes the moving rod move forward, the moving rod will drive the digging knife to move forward, and the digging action of the digging knife is realized on the patient's body. Excavate living tissue. Compared with the biopsy forceps of the prior art, the existing biopsy forceps are difficult to apply in a narrow operating space, and it is very difficult to collect living tissue, even if the amount of living tissue that can be collected is very small, seriously affecting Accuracy of biopsy results. The biopsy forceps of the present invention realizes the digging of living tissue through the forward movement of the digging knife and the digging action, which can effectively realize the collection of living tissue and increase the collection amount of living tissue, thereby improving biopsy inspection. accuracy of results.

Description of drawings

The invention will be described by way of example and with reference to the accompanying drawings, in which:

Fig. 1 is a structural schematic diagram of a digging knife, wherein the front blade of the digging knife is linear;

Figure 2 is a schematic structural diagram of a digging knife, wherein the front blade of the digging knife is in an arc shape;

Figure 3 is a top view of a digging knife, wherein the front blade of the digging knife is in an arc shape;

Figure 4 is a bottom view of the digging knife, wherein the front blade of the digging knife is straight;

Figure 5 is a cross-sectional view of a digging knife, wherein the blade body of the digging knife only includes an arc-shaped blade segment;

Figure 6 is a side view of a digging knife, wherein the blade body of the digging knife includes an arc-shaped blade segment and a straight-shaped blade segment;

7 is a schematic diagram of the split structure of the movable rod and the fixed rod of the biopsy forceps main body;

8 is a schematic diagram of the assembly structure of the movable rod and the fixed rod of the biopsy forceps main body;

9 is a cross-sectional view of the movable rod and the fixed rod of the biopsy forceps main body;

10 is a schematic view of the split structure of the first form of the digging knife and the biopsy forceps, wherein, the interface at the front end of the moving rod is an insertion slot, and the shank of the digging knife is provided with a connecting hole;

11 is a schematic diagram of the split structure of the second form of the digging knife and the biopsy forceps, wherein the interface at the front end of the moving rod is an insertion slot, and there is no connection hole on the handle of the digging knife;

12 is a schematic diagram of the split structure of the third type of digging knife and biopsy forceps, wherein the interface at the front end of the moving rod is a placement groove, and the handle of the digging knife is stepped;

Figure 13 is a schematic diagram of the split structure of the fourth form of the digging knife and the biopsy forceps, wherein the interface at the front end of the moving rod is a placement groove, and the handle of the digging knife is in the shape of a flat plate;

Figure 14 is a schematic diagram of the structure of the digging knife, the moving rod and the fixed rod of the biopsy forceps, wherein the moving rod has moved forward along the fixed rod, and the digging knife is extended in an arc shape, which can dig out living tissue;

15 is a schematic structural diagram of the digging knife, the movable rod and the fixed rod of the biopsy forceps, wherein the movable rod has moved backward along the fixed rod, the digging knife is retracted, and the digging knife is elastically deformed and pressed on the boss of the fixed rod;

Fig. 16 is a side view of the biopsy forceps, wherein the movable rod has moved forward along the fixed rod, and the digging knife extends in an arc shape, which can dig out living tissue.

Figure 17 is a side view of the biopsy forceps, wherein the moving rod has moved backwards along the fixed rod, the digging knife is retracted, and the digging knife is elastically deformed and pressed on the boss of the fixed rod;

Figure 18 is a schematic diagram of a trephine rotary cutting a diseased living tissue of a patient's body;

19 is a schematic view of the retracted biopsy forceps inserted into the cannula, and the front blade of the digging knife roughly facing the annular gap;

Figure 20 is a schematic diagram of the position of the root of the biopsy forceps in the digging state where the digging knife digs into the living tissue;

Figure 21 is a schematic diagram of the first biopsy forceps digging out the living tissue, wherein the living tissue is not cut by the side blade of the digging knife;

Fig. 22 is a schematic diagram of the second type of biopsy forceps digging out the living tissue, wherein the living tissue has been cut by the side cutting edge of the digging knife.

Marking in the picture: 1-digging knife, 11-blade body, 11a-arc-shaped blade section, 11b-straight blade section, 111-front blade, 112-side blade, 113-cavity, 12-handle, 12a-back Handle section, 12b-front handle section, 121-connection hole, 122-cover plate; 2-moving rod, 21-insertion slot, 22-placement slot, 23-guide rail; 3-fixed rod, 31-fixed rod body, 311-Guide groove, 32-End, 321-Boss, 322-Bevel; 4-Sleeve; 5-Trip saw; 6-Annular gap.

Detailed ways

All features disclosed in this specification, or all disclosed steps in a method or process, may be combined in any way except mutually exclusive features and/or steps.

Any feature disclosed in this specification, unless expressly stated otherwise, may be replaced by other equivalent or alternative features serving a similar purpose. That is, unless expressly stated otherwise, each feature is but one example of a series of equivalent or similar features.

Example 1

As shown in FIGS. 1 to 17 , a biopsy forceps for digging out living tissue in this embodiment includes a biopsy forceps main body, and a movable rod 2 of the biopsy forceps main body can move back and forth along its fixed rod 3, and also Including a digging knife 1 arranged at the front end of the movable rod 2, the front end of the digging knife 1 has a cutting edge that can dig into the patient's body; when the biopsy forceps main body makes the movable rod 2 move forward, the movable rod 2. The digging knife 1 will be driven to move forward, and the digging knife 1 will perform a digging action to dig out the living tissue.

In the biopsy forceps of the present invention, the movable rod 2 of the biopsy forceps main body can move back and forth along the fixed rods 3 of the biopsy forceps main body. The specific structure of the biopsy forceps main body can be designed with reference to the prior art. Thanks to the design of the digging knife 1 set at the front end of the moving rod 2, the front end of the digging knife 1 has a cutting edge that can dig into the patient's body; when the main body of the biopsy forceps moves the moving rod 2 forward, the moving rod 2 will drive The excavating knife 1 moves forward, and the excavating action of the excavating knife 1 realizes excavation of living tissue on the patient's body. Compared with the biopsy forceps in the prior art, the existing biopsy forceps either clamp the living tissue through the opening and closing of the jaws, or cut the living tissue through the jaws of the scissors. It can be applied when the operating space is large; however, in a narrow operating space, the existing biopsy forceps are difficult to apply, and it is very difficult to collect living tissue. Even if the amount of living tissue that can be collected is very small, it will seriously affect Accuracy of biopsy results. On the other hand, the biopsy forceps of the present invention realizes the digging of living tissue through the forward movement of the digging knife 1 and the digging movement, which can effectively realize the collection of living tissue and increase the amount of living tissue collected, thereby increasing the biopsy rate. Check the accuracy of the results.

Further, as shown in FIG. 1 to FIG. 6 , the digging knife 1 is made of a hard material that can produce elastic deformation, and is roughly arc-shaped in a free state; the front end of the fixed rod 3 is longer than the movable rod 2 front end. In a narrow operating space, it is convenient for the fixed rod 3 of the biopsy insert to drive the digging knife 1 to perform the action of digging out the living tissue.

Further, when the main body of the biopsy forceps makes the moving rod 2 move forward, the moving rod 2 drives the digging knife 1 to move forward, and the digging knife 1 will perform a digging action to dig out living tissue, At this time, the digging knife 1 is roughly in the shape of an arc, as shown in Figures 14 and 16; when the main body of the biopsy forceps moves the moving rod 2 backward, the moving rod 2 drives the digging knife 1 to move backward, and the digging knife 1 will perform a retracting action, at this time, the digging knife 1 will be elastically deformed and pressed against the front end position of the top surface of the fixed rod 3, as shown in Figure 15 and Figure 17. Since the digging knife 1 is made of a hard material that can produce elastic deformation, it is roughly arc-shaped in a free state, and the front end of the fixed rod 3 is longer than the front end of the movable rod 2 . When the digging blade 1 is retracted, the digging blade 1 can be elastically deformed and pressed against the front end position of the top surface of the fixed rod 3 to prepare for the next extension and digging operation. When the digging knife 1 performs the protruding digging action, the digging knife 1 can gradually recover to a substantially arc shape, so as to realize the protruding digging action of the digging knife 1 .

Further, as shown in FIG. 2 , a cavity 113 is provided at the inner arc wall of the digging blade 1 . The cavity 113 can accommodate the living tissue, so that the excavator 1 can reliably dig out the living tissue.

Optionally, the cutting edge at the front end of the digging knife 1 is linear or arc-shaped. That is, the front blade 111 of the digging blade 1 may be linear, as shown in FIGS. 1 and 4 ; or the front blade 111 of the digging blade 1 may be arc-shaped, as shown in FIGS. 2 and 3 .

Further, as shown in FIG. 1 to FIG. 4 , the side of the digging knife 1 has a cutting edge. One side of the digging knife 1 may have a cutting edge, or both sides of the digging knife 1 may have a cutting edge. The lateral cutting edge of the digger 1 is referred to as the lateral cutting edge 112 . The action of digging out the living tissue of the excavator 1 is mainly realized by its front blade 111 , and the front blade 111 can cut the root of the living tissue, which is beneficial to the separation of the living tissue from the patient's body. The design purpose of the side blade 112 is: when the biopsy forceps digs into the patient's body through the front blade 111 of the digging knife 1, and after the digging knife 1 digs the living tissue to be collected, when the digging knife 1 is rotated by the biopsy forceps, the digging knife The side blade 112 of 1 will cut the living tissue in the circumferential direction, and under the cutting action of the front blade 111 and the side blade 112 of the digger 1, the living tissue is directly separated from the patient's body, so that the digger 1 can reliably remove the living tissue. Dig out. Of course, the excavating knife 1 may also only have the front cutting edge 111 without the side cutting edge 112, and the purpose of excavating the living tissue by the excavating knife 1 can still be achieved.

Further, as shown in FIG. 1 to FIG. 6 , the digging knife 1 includes a blade body 11 and a handle 12 that are connected, the blade body 11 is roughly arc-shaped, and the blade is arranged on the blade body 11 . The blade body 11 of the digging knife 1 is used for digging out living tissue, and the handle 12 of the digging knife 1 is used for connecting the moving rod 2 of the biopsy forceps. When the design is made of a hard material that can generate elastic deformation in combination with the digging blade 1 , specifically, the blade body 11 of the digging blade 1 can generate elastic deformation, and is roughly arc-shaped in a free state. For example, the digging knife 1 is made of medical stainless steel, and the wall thickness of the blade body 11 of the digging knife is 0.5 mm-1 mm, which can produce elastic deformation. When combining the design of the front blade 111 and the side blade 112 , the front blade 111 is arranged at the front end of the blade body 11 , and the side blade 112 is arranged at the lateral direction of the blade body 11 . Further, as shown in FIGS. 5 and 6 , the wall thickness of the blade body 11 decreases smoothly from the rear end to the front end. The resistance of the excavating knife 1 to excavate the living tissue can be reduced, which is beneficial for the excavating knife 1 to excavate the living tissue.

As shown in FIG. 6 , the blade body 11 includes a connected arc-shaped blade section 11a and a straight blade section 11b, the arc-shaped blade section 11a is in an arc shape, and the straight blade section 11b is connected to the arc-shaped blade between the segment 11a and the handle 12 . Of course, as shown in FIG. 5 , it is also feasible that the blade body 11 only includes the arc-shaped blade segment 11a. The design purpose of the blade body 11 including the connected arc-shaped blade segment 11 a and the straight blade segment 11 b is that the straight blade segment 11 b can increase the digging depth of the cutting blade 1 . When combined with the design that the wall thickness of the blade body 11 decreases smoothly from the rear end to the front end, it is preferable that the wall thickness of the arc-shaped blade section 11a of the blade body 11 smoothly decreases from the rear end to the front end. As shown in FIG. 5 and FIG. 6 , the handle 12 is stepped, and includes a rear handle section 12a and a front handle section 12b that are connected to each other. The wall thickness of the front handle section 12b is larger than that of the rear handle section 12a. Thick, the front handle section 12b is connected between the blade body 11 and the rear handle section 12a. It is convenient for the detachable positioning and installation of the knife handle 12 to the biopsy forceps. Of course, it is also possible that the handle 12 is in the shape of a flat plate (for example, the handle 12 only includes the front handle section 12b). As shown in FIG. 1 to FIG. 4 , a connecting hole 121 is formed on the handle 12 . In combination with the design that the handle 12 includes the rear handle section 12a and the front handle section 12b, the connecting hole 121 is opened on the rear handle section 12a.

The digging knife 1 and the movable rod 2 may be a detachable separate structure, or may be a non-detachable one-piece structure, as described in detail below.

Alternatively, as shown in FIGS. 10 to 13 , the digging knife 1 and the moving rod 2 are of separate structures, and the digging knife 1 is detachably connected to the front end of the moving rod 2 . It is convenient to replace the digging knife 1, and the purpose of one digging knife can be realized. An interface for detachably connecting the excavator is provided at the front end position of the movable rod 2, so that the excavator 1 can be detachably installed on the interface at the front end of the movable rod 2, and then use fasteners (such as bolts) to make The digging knife 1 is fixedly connected with the moving rod 2 to form a biopsy forceps.

As shown in FIG. 7 , FIG. 10 , and FIG. 11 , the interface is an insertion slot 21 opened on the front end surface of the moving rod 2 . The digging blade 1 can be inserted into the insertion slot 21 , and the digging blade 11 can be detachably installed on the front end position of the movable rod 2 through bolts. In one embodiment, as shown in FIG. 10 , the top surface of the movable rod is provided with a circular hole penetrating into the insertion slot 21 , the bottom surface of the insertion slot 21 is provided with a threaded hole corresponding to the circular hole, and the The handle 12 is provided with a connecting hole 121. When the handle 12 of the digging knife 1 is inserted into the groove 21, the bolts pass through the round hole and the connecting hole 121 in turn and then screw with the threaded hole, so that the digging knife 1 and the moving rod 2 can be fixed. . In another embodiment, as shown in FIG. 11 , the top surface of the movable rod is provided with a threaded hole penetrating into the insertion slot 21 , and there is no connecting hole on the handle 12 of the digging knife 1 . After the 12 is inserted into the groove 21, the bolts are screwed into the threaded holes, and the digging knife 1 can be pressed tightly, so that the digging knife 1 and the moving rod 2 can be fixed.

As shown in FIG. 8 , FIG. 9 , FIG. 12 , and FIG. 13 , the interface is a mounting groove 22 opened on the top surface of the moving rod 2 and extending to the front end surface. The digging knife 1 can be placed on the mounting groove 22 , and then the digging knife 1 can be detachably installed on the front end of the movable rod 2 through bolts. In one embodiment, as shown in FIG. 12 , the bottom surface of the mounting groove is provided with threaded holes, and the handle 12 of the digging knife 1 is stepped, including a rear handle section 12a and a front handle section 12b, and the rear handle section 12a is provided with a threaded hole. There is a connecting hole 121. When the handle 12 of the digging knife 1 is placed on the mounting groove 22, a cover plate 122 is covered on the rear handle section 12a. The connecting hole 121 is then screwed with the threaded hole, so that the digging knife 1 and the movable rod 2 can be fixed. In another embodiment, as shown in FIG. 13 , the bottom surface of the placement groove is provided with threaded holes, the handle 12 of the digging knife 1 is a flat plate, and the shank 12 is provided with a connecting hole 121 . After being placed on the placement groove 22 , the bolts pass through the connection holes 121 and then are screwed into the threaded holes, so that the digging knife 1 and the movable rod 2 can be fixed. No matter whether the interface is the design of the insertion slot 21 or the placement slot 22 , the digging knife 1 can be detachably installed at the front end of the movable rod 2 , and the fixed connection between the digging knife 1 and the movable rod 2 can be realized.

Optionally, the digging knife 1 and the moving rod 2 are integral structures. That is, the digging knife 1 and the movable rod 2 are connected in a non-detachable manner, for example, the digging knife 1 and the movable rod 2 are connected by welding, or the digging knife 1 and the movable rod 2 are integrally formed.

In a word, it is feasible that the digging cutter 1 and the movable rod 2 are of a separate structure or an integrated structure. In contrast, it is more preferable to design when the digging cutter 1 and the movable rod 2 are separate structures.

Alternatively, as shown in FIGS. 7 to 9 , 14 and 15 , the front end of the top surface of the fixed rod 3 is protruded upward with a boss 321 . When this design is adopted, when the moving rod 2 is moved backward through the main body of the biopsy forceps and the digging knife 1 is retracted, the digging knife will be elastically deformed and pressed on the boss 321 of the fixed rod 3, as shown in Figure 15 Show. Specifically, the boss 321 is opposite to the moving rod 2 . If the design of the boss 321 is not adopted, when the digging blade 1 is retracted, the digging blade 1 will be elastically deformed and pressed against the front end position of the top surface of the fixed rod 3 . In contrast, the design using the boss 321 is the preferred design, and the amount of living tissue that can be excavated is relatively larger.

As shown in FIG. 9 , the top surface of the boss 321 is lower than the top surface of the moving rod 2 . When the moving rod 2 is moved backward through the main body of the biopsy forceps and the digging knife 1 is retracted, it is beneficial to make the digging knife elastically deform and press on the boss 321 of the fixed rod 3, so that the digging knife can be prevented from moving beyond the movement. The purpose of the top surface of the pole 2. If the top surface of the boss 321 is not lower than the top surface of the movable rod 2 , after the retracting action of the digging knife, the digging knife will protrude beyond the top surface of the movable rod 2 .

As shown in FIG. 7 to FIG. 9 , the top of the boss 321 has an inclined surface 322 inclined to the front end of the boss. When the moving rod 2 is moved backward through the main body of the biopsy forceps, and the digging knife is retracted, the digging knife will retract along the inclined surface 322, which is beneficial for the digging knife to elastically deform and press on the boss 321 of the fixed rod 3 .

Alternatively, as shown in FIG. 7 to FIG. 9 , the fixed rod 3 includes a fixed rod body 31 and a detachable end 32 connected to the front end of the fixed rod body 31 . The moving rod 2 can move back and forth along the fixed rod body 31 of the fixed rod 3 . When combined with the design of the boss 321 , the boss 321 is disposed on the end head 32 . The end head 32 can be detachably connected to the front end of the fixed rod body 31 , which facilitates the replacement of the end head 32 and can achieve the purpose of having one end end. Further, as shown in FIGS. 7 to 9 , the end head 32 is detachably connected to the front end of the fixed rod body 31 through bolts; or, the end head 32 is detachably connected to the fixed rod body 31 through a threaded connection. The front end of the fixed rod body 31 is described. In one embodiment, as shown in FIG. 7 , the end head 32 is detachably connected to the front end of the fixed rod body 31 through bolts. In another embodiment, as shown in FIGS. 8 and 9 , the end head 32 is detachably connected to the front end of the fixed rod body 31 through a screw connection. Both can achieve the purpose of detachably connecting the end head 32 to the front end of the fixed rod body 31 .

Further, as shown in FIGS. 7 to 9 , the end head 32 is detachably connected to the front end of the fixed rod body 31 through bolts; or, the end head 32 is detachably connected to the fixed rod body 31 through a threaded connection. The front end of the fixed rod body 31 is described. Both can achieve the purpose of detachably connecting the end head 32 to the front end of the fixed rod body 31 . In one embodiment, as shown in FIG. 7 , the end head 32 is detachably connected to the front end of the fixed rod body 31 through bolts. In another embodiment, as shown in FIGS. 8 and 9 , the end head 32 is detachably connected to the front end of the fixed rod body 31 through a screw connection.

When the design that the digging knife 1 is detachably connected to the front end of the moving rod 2 and the end head 32 is detachably connected to the front end of the fixed rod body 31 are combined, the digging knife 1 and the end head 32 can not be reused, avoiding Risk of cross contamination.

Alternatively, as shown in FIG. 7 to FIG. 9 , the bottom of the movable rod 2 is provided with a guide rail 23 , the top of the fixed rod 3 is provided with a guide groove 311 , and the guide rail 23 is slidably embedded in the Guide 311 slot. It can play a guiding role when the moving rod 2 moves back and forth along the fixed rod 3 , thereby improving the reliability of the moving rod 2 .

Embodiment 2

Based on the design of the first embodiment, this embodiment specifically introduces how to use the biopsy forceps of the first embodiment to dig out the living tissue from the patient's body.

Taking the most common puncture biopsy of spinal lesions as an example, the puncture point, coronal and sagittal puncture angles, and the distance from the skin of the puncture point to the spine of the diseased vertebral body were determined according to the results of spinal CT scan before the operation. Parameters such as the distance from the midpoint of the protrusion. After the preparation for surgery, the patient lies prone on the operating bed, and the C-arm X-ray machine is used to determine the diseased vertebral body. Proceed to perform the following steps under monitoring:

S1, place the cannula 4 at the position where the living tissue is excavated, insert the trephine 5 into the cannula 4 and rotate the focal site of the bone tissue (ie, the diseased living tissue of the patient's body), as shown in FIG. 18 . Show. After the trephine 5 saws the living tissue to be dug to an appropriate depth, the trephine 5 is pulled out. At this time, except for the living tissue root, the living tissue is separated from the patient's body, and the living tissue and the patient's body exist by the trephine 5. An annular gap 6 is formed.

S2. Insert the biopsy forceps in the retracted state into the cannula 4, and align the front blade 111 of the digging knife 1 with the annular gap 6, as shown in FIG. 19;

S3. The moving rod 2 is moved forward through the main body of the biopsy forceps, and the moving rod 2 drives the digging knife 1 to move forward. The digging knife 1 digs into the patient's body, and the digging knife 1 gradually restores to a roughly arc shape, and digs to the living body The root position of the tissue is such that the living tissue is clamped between the digging knife 1 and the front end of the fixed rod 3, which is convenient for digging out the living tissue, as shown in Figure 20;

S4. Pull out the biopsy forceps along the cannula 4 to complete the excavation action of excavating the living tissue. The excavated living tissue is located between the excavating knife 1 and the front end of the fixed rod 3, as shown in FIG. 21 .

In S3, after the excavator 1 digs to the root position of the living tissue, the excavator 1 can be rotated by rotating the biopsy forceps body, and the side blade 112 of the excavator 1 will cut the circumferential direction of the living tissue, and the excavated living tissue is located at Between the digging knife 1 and the front end of the fixed rod 3, as shown in Figure 22.

If the biopsy forceps of the present invention is not used, but the existing living tissue of the existing clamp-type jaws or scissors-type jaws is used, it will be difficult to realize the action of collecting the biopsy tissue, because in order to realize the minimally invasive operation of the biopsy, The specifications of the selected casing 4 and the trephine 5 are relatively small, for example, the inner diameter of the casing 4 is about 5 mm, the inner diameter of the trephine 5 is about 4 mm, and the wall thickness is about 0.5 mm (the inner diameter of the annular gap 6 formed is about 4 mm, and the width is about 4 mm). 0.5mm), in such a small operating space, it is difficult for the existing biopsy forceps to perform the opening and closing action to grasp or cut the living tissue, and the surface of the bone tissue is relatively hard, and the existing biopsy forceps cannot use the ring. The gap 6 further increases the difficulty of collecting living tissue with the existing biopsy forceps. However, when the present invention is adopted, the excavation of living tissue is realized by the forward movement of the excavating knife and the excavation movement. It is very convenient and easy to dig through the surface of the hard bone tissue and dig into the soft bone tissue.

To sum up, using a biopsy forceps of the present invention for digging out living tissue, when the main body of the biopsy forceps moves the moving rod forward, the moving rod will drive the digging knife to move forward, and the digging knife is used to realize the digging. The digging action of living tissue, especially in a narrow operating space, the biopsy forceps of the present invention is convenient to operate, can collect a larger amount of living tissue, improves the accuracy of biopsy, and is beneficial to the diagnosis and treatment of patients.

The present invention is not limited to the foregoing specific embodiments. The present invention extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.

Claims (10)

1. a biopsy forceps for digging out living tissue, comprising a biopsy forceps main body, the movable rod of the biopsy forceps main body can move back and forth along its fixed rod, it is characterized in that: also comprise the front end that is arranged on the described movable rod The front end of the digging knife has a blade that can dig into the patient's body; when the main body of the biopsy forceps moves the moving rod forward, the moving rod will drive the digging knife to move forward, and the digging knife makes a forward movement. The digging action is used to dig out living tissue. 2. A biopsy forceps for excavating living tissue as claimed in claim 2, characterized in that: the excavating knife is made of a hard material that can produce elastic deformation, and is roughly arc-shaped in a free state; The front end of the fixed rod is longer than the front end of the movable rod. 3. A biopsy forceps for digging out living tissue as claimed in claim 2, characterized in that: when the biopsy forceps main body makes the moving rod move forward, the moving rod drives the digging knife to move forward , the digging knife will perform a protruding digging action to dig out the living tissue, and the digging knife is roughly in the shape of an arc at this time; When the main body of the biopsy forceps moves the moving rod backward, the moving rod drives the digging knife to move backward, and the digging knife will retract. At this time, the digging knife will be elastically deformed and pressed in front of the top of the fixed rod. end position. 4 . The biopsy forceps for digging out living tissue according to claim 2 , wherein the front end of the top surface of the fixed rod is protruded upward with a boss. 5 . 5 . The biopsy forceps for digging out living tissue according to claim 2 , wherein the inner arc wall of the digging knife has a cavity. 6 . 6 . The biopsy forceps for excavating living tissue according to claim 2 , wherein the excavating knife has a cutting edge in the lateral direction. 7 . 7. A biopsy forceps for digging out living tissue according to claim 2, wherein the digging knife comprises a blade body and a blade handle that are connected, the blade body is roughly in the shape of an arc, and the blade is arranged on the on the knife. 8 . The biopsy forceps for digging out living tissue according to claim 1 , wherein the digging knife and the moving rod are of separate structures, and the digging knife is detachably connected to the The position of the front end of the moving rod. 9 . The biopsy forceps for digging out living tissue according to claim 1 , wherein the digging knife and the moving rod are integral structures. 10 . 10 . The biopsy forceps for excavating living tissue according to claim 1 , wherein the fixed rod comprises a fixed rod body and a detachable end connected to the front end of the fixed rod body. 11 .

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