CN111887905A - Biopsy forceps for digging living tissue - Google Patents
Biopsy forceps for digging living tissue Download PDFInfo
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- CN111887905A CN111887905A CN202010722101.5A CN202010722101A CN111887905A CN 111887905 A CN111887905 A CN 111887905A CN 202010722101 A CN202010722101 A CN 202010722101A CN 111887905 A CN111887905 A CN 111887905A
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- 238000001574 biopsy Methods 0.000 title claims abstract description 114
- 238000005520 cutting process Methods 0.000 claims description 32
- 230000005489 elastic deformation Effects 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 6
- 238000003306 harvesting Methods 0.000 claims 9
- 230000009471 action Effects 0.000 abstract description 17
- 210000001519 tissue Anatomy 0.000 description 93
- 238000013461 design Methods 0.000 description 15
- 238000003780 insertion Methods 0.000 description 9
- 230000037431 insertion Effects 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 210000000988 bone and bone Anatomy 0.000 description 5
- 230000001575 pathological effect Effects 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 241000425571 Trepanes Species 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 3
- 230000003902 lesion Effects 0.000 description 3
- 206010028980 Neoplasm Diseases 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
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- 231100000915 pathological change Toxicity 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 208000018084 Bone neoplasm Diseases 0.000 description 1
- 206010056377 Bone tuberculosis Diseases 0.000 description 1
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 208000009360 Osteoarticular Tuberculosis Diseases 0.000 description 1
- 238000002591 computed tomography Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 206010061289 metastatic neoplasm Diseases 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
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- 238000000926 separation method Methods 0.000 description 1
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- 238000003892 spreading Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/06—Biopsy forceps, e.g. with cup-shaped jaws
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/02—Instruments for taking cell samples or for biopsy
- A61B10/0233—Pointed or sharp biopsy instruments
- A61B10/025—Pointed or sharp biopsy instruments for taking bone, bone marrow or cartilage samples
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Abstract
The invention discloses biopsy forceps for digging living tissues, and belongs to the technical field of medical instruments. The invention relates to a biopsy forceps for digging living tissues, which comprises a biopsy forceps main body, a movable rod of the biopsy forceps main body can move back and forth along a fixed rod of the biopsy forceps main body, and the biopsy forceps further comprises a digging knife arranged at the front end of the movable rod, wherein the front end of the digging knife is provided with a blade capable of digging into a patient body; when the biopsy forceps main body enables the moving rod to move forwards, the moving rod drives the digging knife to move forwards, and the digging knife performs digging motion to dig out the living tissue. When the biopsy forceps for excavating the living tissue disclosed by the invention are adopted, the movable rod drives the excavating knife to move forwards when the biopsy forceps main body enables the movable rod to move forwards, so that the living tissue is excavated on a patient body through the excavating action of the excavating knife, the collection of the living tissue can be effectively realized, the collection amount of the living tissue is increased, and the accuracy of a biopsy examination result can be further improved.
Description
Technical Field
The invention relates to biopsy forceps for digging living tissues, and belongs to the technical field of medical instruments.
Background
Biopsy is a technique of taking a diseased living tissue from a patient's body by cutting, clamping, puncturing, or the like, and performing pathological examination, which is called "biopsy" for short, surgical pathology examination, and is called "diagnosis and treatment".
Biopsy forceps are an indispensable tool for taking out diseased living tissue, and a large number of designs are available in the prior art. For example, chinese patent: a cervical biopsy forceps (publication No. CN203861275U), a suction biopsy forceps set (publication No. CN204723104U), a novel biopsy forceps (publication No. CN207341776U), a disposable biopsy forceps (publication No. CN209332124U) and the like.
In recent years, with the development of economic society of China, the incidence rate of various tumors shows a trend of increasing year by year, and the primary tumor, metastatic tumor, tuberculosis infection and the like of human bone tissues are continuously increased. In actual clinical work, the gold standard for diagnosing diseases such as bone tumor, tuberculosis and the like needs to obtain part of pathological living tissues for pathological tissue detection and definite diagnosis. The method for obtaining the lesion living tissue mainly comprises open surgical excision taking and percutaneous puncture biopsy at present. The minimally invasive operation of the percutaneous puncture biopsy operation has small damage to the body of a patient, and is the most common biopsy taking method at present. However, the current orthopedic biopsy tool is single, the biopsy forceps, the biopsy puncture needle and the like adopt a direct sampling mode, the operation space is narrow, the actual sampling amount is small, the effect is not ideal, the result negative rate of biopsy is high, the detection result is often not accurate enough, and the diagnosis and treatment of a patient are affected.
Therefore, there is a need for a new biopsy forceps for scooping a living tissue, which can increase the amount of collected living tissue and thus improve the accuracy of biopsy.
Disclosure of Invention
The invention aims to: in view of the above problems, the present invention provides a biopsy forceps for scooping a living tissue, which can increase the amount of collected living tissue and improve the accuracy of a biopsy result.
The technical scheme adopted by the invention is as follows:
a biopsy forceps for digging living tissue comprises a biopsy forceps main body, a movable rod of the biopsy forceps main body can move back and forth along a fixed rod of the biopsy forceps main body, and a digging knife arranged at the front end of the movable rod, wherein the front end of the digging knife is provided with a blade capable of digging into a patient body; when the biopsy forceps main body enables the moving rod to move forwards, the moving rod drives the digging knife to move forwards, and the digging knife performs digging motion to dig out the living tissue.
The biopsy forceps of the invention has the advantages that the moving rod of the biopsy forceps main body can move back and forth along the fixed rod of the biopsy forceps main body, and the specific structure of the biopsy forceps main body can be designed according to the prior art. Due to the design of the digging cutter arranged at the front end of the moving rod, the front end of the digging cutter is provided with a blade which can dig into the body of the patient; when the biopsy forceps main body enables the moving rod to move forwards, the moving rod drives the digging cutter to move forwards, and the living tissue is dug on the body of the patient through the digging action of the digging cutter. Compared with the biopsy forceps in the prior art, the existing biopsy forceps can clamp the living tissue by opening and closing the forceps holder type jaws or shear the living tissue by the scissor type jaws, and the existing biopsy forceps can be applied when the operation space is large; however, in a narrow operation space, the conventional biopsy forceps are difficult to apply, the biopsy forceps are difficult to collect the living tissue, and even if the quantity of the living tissue which can be collected is very small, the accuracy of the biopsy result is seriously influenced. The biopsy forceps of the invention realize the digging of the living tissue through the forward movement and the digging movement of the digging knife, can effectively realize the collection of the living tissue, and improve the collection amount of the living tissue, thereby improving the accuracy of the biopsy examination result.
Furthermore, the digging cutter is made of a hard material capable of generating elastic deformation, and is approximately arc-shaped in a free state; the front end of the fixed rod is longer than the front end of the moving rod.
Further, when the biopsy forceps main body enables the moving rod to move forwards, the moving rod drives the digging cutter to move forwards, the digging cutter extends out to dig and take the living tissue, and the digging cutter is approximately arc-shaped at the moment; when the biopsy forceps main body enables the moving rod to move backwards, the moving rod drives the digging cutter to move backwards, the digging cutter retracts, and the digging cutter generates elastic deformation and is pressed at the front end position of the top surface of the fixed rod. Because the digging cutter is made of a hard material which can generate elastic deformation, the digging cutter is approximately arc-shaped in a free state, and the front end of the fixed rod is longer than the front end of the moving rod. When the digging cutter retracts, the digging cutter can generate elastic deformation and is pressed at the front end of the top surface of the fixed rod for the next extending digging action. When the digging cutter does the extending digging action, the digging cutter can gradually recover to be approximately arc-shaped so as to realize the extending digging action of the digging cutter.
Preferably, the front end of the top surface of the fixed rod is upwards provided with a boss in a protruding mode. When the biopsy forceps are adopted, the movable rod moves backwards through the biopsy forceps main body, and the digging knife elastically deforms and presses the lug boss of the fixed rod when retracting.
Further, a concave cavity is formed in the inner arc wall of the digging cutter. The cavity can accommodate living tissue so that the digger can reliably dig the living tissue.
Further, the side of the digging cutter is provided with a blade. Either one side of the digger may have a blade or both sides of the digger may have blades. The side edges of the digger are referred to as side edges. The action of digging the living tissue by the digging knife is mainly realized by the front blade, and the front blade can cut the root of the living tissue and is beneficial to the separation of the living tissue and the body of a patient. The design purpose of the side cutting edge is as follows: when the biopsy forceps dig into the body of the patient through the front blade of the digging cutter, the digging cutter digs the living tissue to be collected, and then the digging cutter rotates through the biopsy forceps, the side blades of the digging cutter cut the circumferential direction of the living tissue, and the living tissue is directly separated from the body of the patient under the cutting action of the front blade and the side blades of the digging cutter, so that the digging cutter can reliably dig and take out the living tissue.
Further, the digging cutter comprises a cutter body and a cutter handle which are connected, the cutter body is approximately arc-shaped, and the cutting edge is arranged on the cutter body. The knife body of the digging knife is used for digging the living tissue, and the knife handle of the digging knife is connected with the moving rod of the biopsy forceps.
Optionally, the digging cutter and the moving rod are of a split structure, and the digging cutter is detachably connected to the front end position of the moving rod. The utility model is convenient to replace the digging cutter and can realize the purpose of one digging cutter.
Optionally, the digging cutter and the moving rod are of an integrated structure. That is, the digging cutter and the moving rod are connected in a non-detachable way, for example, the digging cutter and the moving rod are connected by welding, or the digging cutter and the moving rod are integrally manufactured into a structure.
Optionally, the fixed rod comprises a fixed rod body and a tip detachably connected to the front end of the fixed rod body. The end can be conveniently replaced, and the purpose of one affected end can be realized.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
when the biopsy forceps body enables the moving rod to move forwards, the moving rod drives the digging cutter to move forwards, and the living tissue is dug on a patient body through the digging action of the digging cutter. Compared with the biopsy forceps in the prior art, the biopsy forceps are difficult to apply in a narrow operation space, the biopsy tissue is very difficult to collect, and even if the quantity of the biopsy tissue which can be collected is very small, the accuracy of the biopsy result is seriously influenced. The biopsy forceps of the invention realize the digging of the living tissue through the forward movement and the digging movement of the digging knife, can effectively realize the collection of the living tissue, and improve the collection amount of the living tissue, thereby improving the accuracy of the biopsy examination result.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a configuration of a digging cutter wherein the front edge of the digging cutter is linear;
FIG. 2 is a schematic structural view of a digging cutter wherein the front edge of the digging cutter is in the shape of a circular arc;
FIG. 3 is a top view of a digging cutter wherein the front edge of the digging cutter is radiused;
FIG. 4 is a bottom view of the digging blade wherein the front edge of the digging blade is linear;
FIG. 5 is a cross-sectional view of a pick wherein the body of the pick includes only arcuate blade segments;
FIG. 6 is a side view of a pick having a body including an arcuate blade section and a straight blade section;
FIG. 7 is a schematic diagram showing a structure of the biopsy forceps main body in which a movable rod and a fixed rod are separated from each other;
FIG. 8 is a schematic view of the assembled structure of the moving rod and the fixed rod of the main body of the bioptome;
FIG. 9 is a cross-sectional view of the moving and stationary bars of the bioptome body;
FIG. 10 is a schematic view of a first form of a split structure of a digging cutter and biopsy forceps, wherein an interface at the front end of a moving rod is an insertion groove, and a handle of the digging cutter is provided with a connecting hole;
FIG. 11 is a schematic view of a second type of detachable structure of a digging knife and a biopsy forceps, wherein an interface at the front end of a moving rod is an insertion groove, and a knife handle of the digging knife is not provided with a connecting hole;
FIG. 12 is a schematic view of a third form of a split structure of a digging cutter and a biopsy forceps, wherein an interface at the front end of a moving rod is a mounting groove, and a handle of the digging cutter is in a step shape;
FIG. 13 is a schematic view of a fourth form of a detachable structure of a digging cutter and a biopsy forceps, wherein an interface at the front end of a moving rod is a mounting groove, and a handle of the digging cutter is in a flat plate shape;
FIG. 14 is a schematic structural view of the digger blade, moving rod and stationary rod of the bioptome, wherein the moving rod has moved forward along the stationary rod and the digger blade is extended in an arc shape to dig a living tissue;
FIG. 15 is a schematic structural view of the knife, moving rod and stationary rod of the bioptome, wherein the moving rod has moved rearward along the stationary rod, the knife is retracted, the knife is elastically deformed and pressed against the boss of the stationary rod;
FIG. 16 is a side view of a bioptome wherein the movable bar has been moved forward along the stationary bar and the blades are extended in an arcuate configuration to scoop tissue.
FIG. 17 is a side view of the bioptome wherein the moving rod has moved rearward along the stationary rod, the digger is retracted, the digger is elastically deformed and pressed against the boss of the stationary rod;
FIG. 18 is a schematic view of a trephine rotating to cut diseased living tissue of a patient's body;
FIG. 19 is a schematic view of the bioptome in a retracted state inserted into the cannula with the forward edge of the digger generally facing the annulus;
FIG. 20 is a schematic view of the scooping blade of the bioptome in a scooped state digging into the root position of the living tissue;
FIG. 21 is a schematic view of a first type of bioptome being used to core a living tissue that has not been cut by the side edges of the coring blade;
FIG. 22 is a schematic view of a second type of bioptome used to core a living tissue, wherein the living tissue has been cut by the side edges of the core.
The labels in the figure are: 1-digging cutter, 11-cutter body, 11 a-arc-shaped cutter section, 11 b-straight cutter section, 111-front cutting edge, 112-side cutting edge, 113-concave cavity, 12-cutter handle, 12 a-rear handle section, 12 b-front handle section, 121-connecting hole and 122-cover plate; 2-moving rod, 21-inserting groove, 22-placing groove and 23-guide rail; 3-fixed rod, 31-fixed rod body, 311-guide groove, 32-end, 321-boss and 322-inclined plane; 4-a sleeve; 5-trepanning; 6 annular gap.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Example one
As shown in fig. 1 to 17, the biopsy forceps for cutting living tissue of the present embodiment includes a biopsy forceps main body, a moving rod 2 of the biopsy forceps main body can move back and forth along a fixed rod 3 thereof, and a cutting blade 1 disposed at a front end of the moving rod 2, wherein a cutting edge capable of cutting into a patient body is disposed at a front end of the cutting blade 1; when the biopsy forceps main body enables the moving rod 2 to move forwards, the moving rod 2 drives the digging cutter 1 to move forwards, and the digging cutter 1 performs digging motion to dig out the living tissue.
The biopsy forceps of the invention has a movable rod 2 of the main body of the forceps which can move back and forth along a fixed rod 3 of the main body of the forceps, and the specific structure of the main body of the forceps can be designed according to the prior art. Due to the design of the digging cutter 1 arranged at the front end of the moving rod 2, the front end of the digging cutter 1 is provided with a blade which can dig into the body of a patient; when the biopsy forceps main body enables the moving rod 2 to move forwards, the moving rod 2 drives the digging knife 1 to move forwards, and the living tissue is dug on the body of a patient through the digging action of the digging knife 1. Compared with the biopsy forceps in the prior art, the existing biopsy forceps can clamp the living tissue by opening and closing the forceps holder type jaws or shear the living tissue by the scissor type jaws, and the existing biopsy forceps can be applied when the operation space is large; however, in a narrow operation space, the conventional biopsy forceps are difficult to apply, the biopsy forceps are difficult to collect the living tissue, and even if the quantity of the living tissue which can be collected is very small, the accuracy of the biopsy result is seriously influenced. The biopsy forceps of the invention realize the digging of the living tissue through the forward movement and the digging movement of the digging knife 1, can effectively realize the collection of the living tissue, and improve the collection amount of the living tissue, thereby improving the accuracy of the biopsy examination result.
Further, as shown in fig. 1 to 6, the digging cutter 1 is made of a hard material capable of generating elastic deformation, and is approximately arc-shaped in a free state; the front end of the fixed rod 3 is longer than the front end of the moving rod 2. In a narrow operation space, the fixed rod 3 convenient for biopsy embedding drives the digging knife 1 to perform the action of digging the living tissue.
Further, when the biopsy forceps main body moves the moving rod 2 forward, the moving rod 2 drives the digging blade 1 to move forward, the digging blade 1 will extend and dig to dig the living tissue, and at this time, the digging blade 1 is roughly arc-shaped, as shown in fig. 14 and 16; when the biopsy forceps main body enables the moving rod 2 to move backwards, the moving rod 2 drives the digging blade 1 to move backwards, the digging blade 1 retracts, and at the moment, the digging blade 1 generates elastic deformation and is pressed at the front end position of the top surface of the fixed rod 3, as shown in fig. 15 and 17. Because the digging cutter 1 is made of a hard material which can generate elastic deformation, the digging cutter is approximately arc-shaped in a free state, and the front end of the fixed rod 3 is longer than the front end of the moving rod 2. When the digging cutter 1 retracts, the digging cutter 1 can generate elastic deformation and is pressed at the front end position of the top surface of the fixed rod 3 for the next extending digging action. When the digging cutter 1 extends and digs, the digging cutter 1 can gradually return to be approximately arc-shaped so as to realize the extending and digging action of the digging cutter 1.
Further, as shown in fig. 2, the digging cutter 1 has a concave cavity 113 at the inner arc wall. The cavity 113 can accommodate the living tissue to enable the shaver 1 to reliably scoop the living tissue.
Optionally, the cutting edge at the front end of the digging cutter 1 is linear or circular arc-shaped. That is, the front edge 111 of the shovel 1 may be linear as shown in fig. 1 and 4; alternatively, the front edge 111 of the shovel 1 has an arc shape as shown in fig. 2 and 3.
Further, as shown in fig. 1 to 4, the side of the excavator blade 1 has a blade. Either one side of the cutting blade 1 has a cutting edge or both sides of the cutting blade 1 have cutting edges. The side edges of the digger 1 are referred to as side edges 112. The digging blade 1 mainly realizes the digging action of the living tissue through the front blade 111, and the front blade 111 can cut the root of the living tissue and is beneficial to separating the living tissue from the body of a patient. And the side blade 112 is designed to: when the biopsy forceps dig into the body of the patient through the front blade 111 of the digging cutter 1, the digging cutter 1 digs the living tissue to be collected, and then the digging cutter 1 rotates through the biopsy forceps, the side blade 112 of the digging cutter 1 cuts the circumferential direction of the living tissue, and the living tissue is directly separated from the body of the patient under the cutting action of the front blade 111 and the side blade 112 of the digging cutter 1, so that the digging cutter 1 can reliably dig and take out the living tissue. Of course, the digger 1 may be designed to have only the front blade 111 and no side blade 112, and the object of the digger 1 to remove the living tissue can still be achieved.
Further, as shown in fig. 1 to 6, the excavator knife 1 includes a blade 11 and a handle 12 connected to each other, the blade 11 is substantially arc-shaped, and the cutting edge is disposed on the blade 11. The knife body 11 of the digging knife 1 is used for digging the living tissue, and the knife handle 12 of the digging knife 1 is used for connecting the moving rod 2 of the biopsy forceps. When the digging cutter 1 is made of a hard material capable of generating elastic deformation, specifically, the cutter body 11 of the digging cutter 1 can generate elastic deformation and is approximately arc-shaped in a free state. For example, the digger 1 is made of medical stainless steel, and the wall thickness of the blade body 11 of the digger is 0.5mm-1mm, so that the digger can generate elastic deformation. When the design of the front blade 111 and the side blade 112 is combined, the front blade 111 is disposed at the front end of the blade body 11, and the side blade 112 is disposed in the lateral direction of the blade body 11. Further, as shown in fig. 5 and 6, the wall thickness of the blade body 11 decreases smoothly from the rear end to the front end. Can reduce the resistance of the digger 1 in digging the living tissue, and is beneficial to the digger 1 in digging the living tissue.
As shown in fig. 6, the knife body 11 includes an arc-shaped knife section 11a and a straight knife section 11b, the arc-shaped knife section 11a is arc-shaped, and the straight knife section 11b is connected between the arc-shaped knife section 11a and the knife handle 12. Of course, it is also possible that the blade body 11 includes only the arc-shaped blade section 11a, as shown in fig. 5. The blade body 11 includes the connected arc-shaped blade section 11a and the straight blade section 11b, and the straight blade section 11b is designed to increase the cutting depth of the excavator knife 1. In combination with the design that the wall thickness of the blade body 11 smoothly decreases 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 6, the tool holder 12 is stepped and includes a rear holder section 12a and a front holder section 12b connected to each other, the wall thickness of the front holder section 12b is greater than that of the rear holder section 12a, and the front holder section 12b is connected between the tool body 11 and the rear holder section 12 a. Facilitating the detachable positioning and mounting of the handle 12 to the biopsy forceps. Of course, the shank 12 may be flat (e.g., the shank 12 may include only the front shank segment 12 b). As shown in fig. 1 to 4, the tool holder 12 is provided with a connecting hole 121. When the design of the tool shank 12 including the rear shank segment 12a and the front shank segment 12b is combined, the connection hole 121 is opened in the rear shank segment 12 a.
The excavator knife 1 and the moving rod 2 may be detachable and separated structures or may be non-detachable and integrated structures, as described below.
Alternatively, as shown in fig. 10 to 13, the excavator knife 1 and the moving rod 2 are separate structures, and the excavator knife 1 is detachably connected to the front end of the moving rod 2. The digging cutter 1 is convenient to replace, and the purpose of one digging cutter can be realized. The front end of the moving rod 2 is provided with a port for detachably connecting the digging cutter, so that the digging cutter 1 can be detachably arranged on the port at the front end of the moving rod 2, and the digging cutter 1 and the moving rod 2 are fixedly connected through a fastener (such as a bolt) to form the biopsy forceps.
As shown in fig. 7, 10, and 11, the interface is an insertion groove 21 opened in the distal end surface of the moving rod 2. The shovel 1 can be inserted into the insertion groove 21, and the shovel 11 can be detachably attached to the front end of the moving rod 2 by a bolt. In one embodiment, as shown in fig. 10, a circular hole penetrating through the insertion groove 21 is formed in the top surface of the moving rod, a threaded hole corresponding to the circular hole is formed in the bottom surface of the insertion groove 21, a connection hole 121 is formed in the handle 12 of the excavating knife 1, and after the handle 12 of the excavating knife 1 is inserted into the insertion groove 21, a bolt sequentially penetrates through the circular hole and the connection hole 121 and then is screwed with the threaded hole, so that the fixing of the excavating knife 1 and the moving rod 2 can be realized. In another embodiment, as shown in fig. 11, a threaded hole penetrating through to the insertion groove 21 is formed in the top surface of the moving rod, the shank 12 of the digging cutter 1 has no connection hole, and after the shank 12 of the digging cutter 1 is inserted into the insertion groove 21, a bolt is screwed into the threaded hole to tightly push the digging cutter 1, so that the digging cutter 1 and the moving rod 2 can be fixed.
As shown in fig. 8, 9, 12 and 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 cutter 1 can be placed on the placing groove 22, and the digging cutter 1 can be detachably arranged at the front end position of the moving rod 2 through a bolt. In one embodiment, as shown in fig. 12, a threaded hole is formed in the bottom surface of the mounting groove, the holder 12 of the digging cutter 1 is in a step shape and includes a rear holder section 12a and a front holder section 12b, a connecting hole 121 is formed in the rear holder section 12a, when the holder 12 of the digging cutter 1 is mounted on the mounting groove 22, a cover plate 122 is covered on the rear holder section 12a, a circular hole is formed in the cover plate 122, and a bolt sequentially penetrates through the circular hole and the connecting hole 121 and then is screwed with the threaded hole, so that the digging cutter 1 and the moving rod 2 can be fixed. In another embodiment, as shown in fig. 13, a threaded hole is formed in the bottom surface of the mounting groove, the holder 12 of the digging cutter 1 is a flat plate, a connecting hole 121 is formed in the holder 12, and after the holder 12 of the digging cutter 1 is mounted on the mounting groove 22, a bolt penetrates through the connecting hole 121 and then is screwed with the threaded hole, so that the digging cutter 1 and the moving rod 2 can be fixed. No matter the interface is the design of inserting groove 21 or laying groove 22, can realize that digging cutter 1 is detachably installed in the front position of moving pole 2, realize digging cutter 1 and move the fixed connection of pole 2.
Optionally, the digging cutter 1 and the moving rod 2 are of an integral structure. That is, the digging cutter 1 and the moving rod 2 are connected together in a non-detachable manner, for example, the digging cutter 1 and the moving rod 2 are connected by welding, or the digging cutter 1 and the moving rod 2 are integrally formed.
In short, the digging cutter 1 and the moving rod 2 can be in a split structure or an integral structure. In contrast, the preferred design is better when the digging cutter 1 and the moving rod 2 are of a split structure.
Alternatively, as shown in fig. 7 to 9, 14 and 15, a boss 321 protrudes upward from the front end of the top surface of the fixed rod 3. With this design, when the movable rod 2 is moved backward by the main body of the bioptome and the cutting blade 1 is retracted, the cutting blade is elastically deformed and pressed against the boss 321 of the fixed rod 3, as shown in fig. 15. Specifically, the boss 321 faces the moving rod 2. If the design of the boss 321 is not adopted, when the digging cutter 1 retracts, the digging cutter 1 generates elastic deformation and is pressed at the front end position of the top surface of the fixed rod 3. In contrast, the design using the boss 321 is a preferable design, and the amount of the living tissue that can be scooped 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 biopsy forceps main body enables the moving rod 2 to move backwards and the digging cutter 1 retracts, the digging cutter can elastically deform and is pressed on the boss 321 of the fixed rod 3, and the purpose that the digging cutter does not exceed the top surface of the moving rod 2 can be achieved. If the top surface of the boss 321 is not lower than the top surface of the moving rod 2, the cutting blade will extend beyond the top surface of the moving rod 2 after retraction.
As shown in fig. 7 to 9, the top of the boss 321 has a bevel 322 sloping to the boss front face. When the movable rod 2 moves backwards through the biopsy forceps main body and the digging cutter retracts, the digging cutter retracts along the inclined surface 322, and the elastic deformation of the digging cutter is facilitated and the digging cutter is pressed on the boss 321 of the fixed rod 3.
Alternatively, as shown in fig. 7 to 9, the fixed bar 3 includes a fixed bar body 31 and a head 32 detachably connected to the front end of the fixed bar body 31. The moving rod 2 can move back and forth along the fixed rod body 31 of the fixed rod 3. In combination with the design of the boss 321, the boss 321 is disposed on the tip 32. The tip 32 can be detachably connected to the front end of the fixed rod body 31, so that the tip 32 can be replaced conveniently, and the purpose of one tip can be achieved. Further, as shown in fig. 7 to 9, the head 32 is detachably connected to the front end of the fixed rod body 31 by a bolt; or, the end head 32 is detachably connected to the front end of the fixed rod body 31 in a threaded connection manner. In one embodiment, as shown in fig. 7, the head 32 is detachably connected to the front end of the fixed rod body 31 by bolts. In another embodiment, as shown in fig. 8 and 9, the head 32 is detachably connected to the front end of the fixed rod body 31 by a screw connection. The purpose of detachably connecting the tip 32 to the front end of the fixed rod body 31 can be achieved.
Further, as shown in fig. 7 to 9, the head 32 is detachably connected to the front end of the fixed rod body 31 by a bolt; or, the end head 32 is detachably connected to the front end of the fixed rod body 31 in a threaded connection manner. The purpose of detachably connecting the tip 32 to the front end of the fixed rod body 31 can be achieved. In one embodiment, as shown in fig. 7, the head 32 is detachably connected to the front end of the fixed rod body 31 by bolts. In another embodiment, as shown in fig. 8 and 9, the head 32 is detachably connected to the front end of the fixed rod body 31 by a screw connection.
When the digging cutter 1 is detachably connected to the front end position of the moving rod 2 and the end head 32 is detachably connected to the front end of the fixed rod body 31, the digging cutter 1 and the end head 32 can not be repeatedly used, and the risk of cross infection is avoided.
Alternatively, as shown in fig. 7 to 9, a guide rail 23 is disposed at the bottom of the moving rod 2, a guide groove 311 is disposed at the top of the fixed rod 3, and the guide rail 23 is slidably inserted into the guide groove 311. The device can play a role in guiding when the moving rod 2 moves back and forth along the fixed rod 3, and improves the reliability of the movement of the moving rod 2.
Example two
Based on the design of the first embodiment, this embodiment specifically describes how to use the biopsy forceps of the first embodiment to dig living tissue on the body of a patient.
Taking the most common spinal focus aspiration biopsy as an example, parameters such as an aspiration point of a pathological vertebral body by pedicle aspiration, an aspiration angle of a coronal position and a sagittal position, a distance between skin of the aspiration point and a midpoint of spinous process of the pathological vertebral body and the like are determined according to a spinal CT scanning result before an operation. After the operation preparation is finished, after the patient lies prostrate on an operating table, a C-arm X-ray machine is used for determining a pathological change vertebral body, a puncture guide needle is accurately inserted into a pathological change part according to preoperative measurement parameters after disinfection and towel spreading, and then the following steps are continuously executed under the monitoring of the C-arm X-ray machine:
s1, the cannula 4 is placed at the position where the living tissue is to be excavated, and the trepan 5 is inserted into the cannula 4 and is rotated to saw the lesion site of the bone tissue (i.e., the lesion living tissue of the patient' S body), as shown in FIG. 18. After the ring saw 5 has sawn the living tissue to be excavated to a suitable depth, the ring saw 5 is pulled out, and at this time, the living tissue is separated from the patient body except for the root of the living tissue, and an annular gap 6 formed by the ring saw 5 exists between the living tissue and the patient body.
S2, inserting the biopsy forceps in the retracted state into the cannula 4 with the front blade 111 of the digger 1 aligned with the annular space 6, as shown in FIG. 19;
s3, the movable rod 2 is moved forwards through the biopsy forceps main body, the movable rod 2 drives the digging cutter 1 to move forwards, the digging cutter 1 digs into the body of the patient, the digging cutter 1 gradually recovers to be approximately arc-shaped and digs to the root position of the living tissue, so that the living tissue is clamped between the digging cutter 1 and the front end of the fixed rod 3, and the living tissue is conveniently dug and taken out, as shown in figure 20;
s4, the biopsy forceps are pulled out along the cannula 4, the cutting operation for cutting the living tissue is completed, and the cut living tissue is positioned between the cutting blade 1 and the tip of the fixed bar 3, as shown in FIG. 21.
In step S3, after the spatula 1 has dug up to the root of the living tissue, the spatula 1 is rotated by rotating the main body of the biopsy forceps, the side blades 112 of the spatula 1 cut the living tissue in the circumferential direction, and the dug-up living tissue is positioned between the spatula 1 and the distal end of the fixed bar 3, as shown in fig. 22.
If the biopsy forceps of the present invention is not used, but the existing living tissue of the existing forceps holder type jaws or scissors type jaws is used, the action of collecting the biopsy tissue is difficult to achieve, because the specifications of the selected cannula 4 and the trepan 5 are small for realizing the minimally invasive operation of the biopsy, for example, the inner diameter of the cannula 4 is about 5mm, the inner diameter of the trepan 5 is about 4mm, and the wall thickness is about 0.5mm (the inner diameter of the formed annular gap 6 is about 4mm, and the width is about 0.5mm), in the narrow operation space, the existing biopsy forceps are difficult to perform the opening and closing action to clamp or cut the living tissue, the surface of the bone tissue is hard, and the existing biopsy forceps cannot utilize the annular gap 6, so that the difficulty of collecting the living tissue by the existing biopsy forceps is increased. When the invention is adopted, the digging of the living tissue is realized through the forward movement and the digging movement of the digging knife, the digging knife can conveniently dig into the body of the patient from the annular gap 6, and the digging knife penetrates through the surface of the hard bone tissue through the annular gap 6 and digs into the soft bone tissue, thereby being very convenient and easy to operate.
In summary, according to the biopsy forceps for cutting the living tissue of the present invention, when the biopsy forceps main body moves the moving rod forward, the moving rod drives the cutting blade to move forward, and the cutting action for cutting the living tissue is realized through the cutting blade.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (10)
1. A biopsy forceps for excavating living tissue, which comprises a biopsy forceps main body, wherein a movable rod of the biopsy forceps main body can move back and forth along a fixed rod of the biopsy forceps main body, and is characterized in that: the front end of the digging knife is provided with a blade which can dig into the body of the patient; when the biopsy forceps main body enables the moving rod to move forwards, the moving rod drives the digging knife to move forwards, and the digging knife performs digging motion to dig out the living tissue.
2. A bioptome for harvesting living tissue, as recited in claim 2, wherein: the digging cutter is made of a hard material capable of generating elastic deformation, and is approximately arc-shaped in a free state; the front end of the fixed rod is longer than the front end of the moving rod.
3. A bioptome for harvesting living tissue, as recited in claim 2, wherein: when the biopsy forceps main body enables the moving rod to move forwards, the moving rod drives the digging cutter to move forwards, the digging cutter extends out to dig and take the living tissue, and the digging cutter is approximately arc-shaped at the moment;
when the biopsy forceps main body enables the moving rod to move backwards, the moving rod drives the digging cutter to move backwards, the digging cutter retracts, and the digging cutter generates elastic deformation and is pressed at the front end position of the top surface of the fixed rod.
4. A bioptome for harvesting living tissue, as recited in claim 2, wherein: the front end of the top surface of the fixed rod is upwards protruded with a boss.
5. A bioptome for harvesting living tissue, as recited in claim 2, wherein: and a concave cavity is formed in the inner arc wall of the digging cutter.
6. A bioptome for harvesting living tissue, as recited in claim 2, wherein: the side of the digging cutter is provided with a cutting edge.
7. A bioptome for harvesting living tissue, as recited in claim 2, wherein: the digging cutter comprises a cutter body and a cutter handle which are connected, the cutter body is approximately arc-shaped, and the cutting edge is arranged on the cutter body.
8. A bioptome for harvesting living tissue, as recited in claim 1, wherein: the digging cutter and the moving rod are of a split structure, and the digging cutter is detachably connected to the front end of the moving rod.
9. A bioptome for harvesting living tissue, as recited in claim 1, wherein: the digging cutter and the moving rod are of an integrated structure.
10. A bioptome for harvesting living tissue, as recited in claim 1, wherein: the fixed rod comprises a fixed rod body and an end head detachably connected to the front end of the fixed rod body.
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| CN202010722101.5A CN111887905A (en) | 2020-07-24 | 2020-07-24 | Biopsy forceps for digging living tissue |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010722101.5A CN111887905A (en) | 2020-07-24 | 2020-07-24 | Biopsy forceps for digging living tissue |
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| CN209332124U (en) * | 2018-12-21 | 2019-09-03 | 张亚美 | Disposable biopsy forceps |
| CN213722135U (en) * | 2020-07-24 | 2021-07-20 | 梁静萍 | Biopsy forceps main body and biopsy forceps thereof |
| CN214231395U (en) * | 2020-07-24 | 2021-09-21 | 梁静萍 | Digging cutter for biopsy forceps and biopsy forceps thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5601572A (en) * | 1989-08-16 | 1997-02-11 | Raychem Corporation | Device or apparatus for manipulating matter having a elastic ring clip |
| US5797938A (en) * | 1995-10-20 | 1998-08-25 | Ethicon Endo-Surgery, Inc. | Self protecting knife for curved jaw surgical instruments |
| US5913866A (en) * | 1997-06-19 | 1999-06-22 | Cardiothoracic Systems, Inc. | Devices and methods for harvesting vascular conduits |
| US20100185116A1 (en) * | 2009-01-19 | 2010-07-22 | King Saud University | Punch biopsy device |
| US20120046682A1 (en) * | 2009-09-24 | 2012-02-23 | Medicinelodge, Inc. Dba Imds Co-Innovation | Reciprocating surgical instruments |
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