CN114533146A

CN114533146A - Tumor puncture sampling device

Info

Publication number: CN114533146A
Application number: CN202210301508.XA
Authority: CN
Inventors: 查子慧; 张国华; 牛芹修; 邹泳钰; 梅荣珍
Original assignee: Shandong Qianfoshan Hospital
Current assignee: Shandong Qianfoshan Hospital
Priority date: 2022-03-24
Filing date: 2022-03-24
Publication date: 2022-05-27

Abstract

The invention discloses a tumor puncture sampling device, which has the structure that: the puncture tube is fixed on the bottom surface of the shell. The inner cylinder is vertically arranged in the shell, and the upper port of the inner cylinder is positioned on the top surface of the shell. The sampling tube is vertically inserted into the inner cylinder and is detachably connected with the inner cylinder. The piston is arranged in the sampling tube, the lower end of the push rod penetrates through the sampling tube and then is connected with the piston, and the sampling needle is fixed on the piston. The upper end and the lower end of the first elastic piece are respectively connected with the top surface of the sampling tube and the piston. The stabilizing part is fixed behind the inner cylinder in the shell, the lower end of the trigger rod penetrates through the top surface of the shell and the stabilizing part and then is connected with the cone, and a circle of groove is formed in the side wall of the cone. The upper end and the lower end of the second elastic part are respectively connected with the trigger rod and the stabilizing part. The shearing part is arranged below the stabilizing part, and the bottom surface of the shell is provided with an opening for the cone to go in and out. This sampling device can cut off the tumour tissue of collection on the sample needle fast after the sample, reduces the process of dragging and tearing apart, slows down patient's misery, makes the sampling process more high-efficient convenient.

Description

Tumor puncture sampling device

Technical Field

The invention relates to the technical field of tumor sampling, in particular to a tumor puncture sampling device.

Background

Tumor refers to the space occupying block protrusion formed by local tissue cell proliferation under the action of various tumorigenic factors. The incidence of various tumor diseases is increasing in recent years along with the factors of the acceleration of life rhythm, the increase of life pressure, irregular diet and the like. Tumor biopsy is a pathological examination of tumor tissues to further define pathological diagnosis of tumors. Tumor tissue is typically obtained by puncturing the patient at the location to be sampled by a puncturing device and then submitted to pathological examination.

At present, a common tumor tissue sampling mode mainly includes that after a puncture needle in a puncture device pierces a tumor tissue, a barb on the puncture needle hooks the tumor tissue and then pulls out the tumor tissue, and then the tumor tissue is pulled off while the puncture needle is pulled out to realize sampling. However, the sampling mode is easy to enlarge the wound surface of the sampling by pulling the tumor tissue, brings great pain to the patient, and simultaneously easily causes large-area bleeding at the sampling position, causes conflict of the patient on the sampling, and is not beneficial to the treatment of the patient. In such cases, the physician often needs to take care to reduce the pain of the patient, which results in a sampling procedure that is time consuming, labor intensive, and inefficient. In addition, after the tumor tissue is taken out from the body of a patient, the tumor tissue is easy to block in the groove of the sampling device, so that the tumor tissue is inconvenient to take down from the sampling device, and the sampling efficiency is also influenced.

Disclosure of Invention

In order to solve the problems, the invention provides a tumor puncture sampling device which can rapidly cut off tumor tissues collected on a sampling needle after sampling, reduce the processes of pulling and tearing, effectively relieve the pain of a patient and enable the sampling process to be more efficient and convenient. In order to achieve the above object, the technical solution of the present invention is as follows.

A tumor puncture sampling device, comprising: the sampling device comprises a shell, a puncture tube, an inner tube, a sampling tube, a piston, a push rod, a sampling needle, a first elastic part, a stabilizing part, a trigger rod, a cone, a second elastic part, a shearing part and a third elastic part. Wherein: the puncture tube is vertically fixed on the bottom surface of the shell, and the inner cavities of the puncture tube and the shell are communicated. The inner cylinder is vertically arranged in the shell, and the upper port of the inner cylinder is positioned on the top surface of the shell. The sampling tube is vertically inserted into the inner cylinder and is detachably connected with the inner cylinder, and the lower ports of the inner cylinder and the sampling tube are suspended above the bottom surface of the shell. The piston is arranged in the sampling tube, the lower end of the push rod movably penetrates through the top surface of the sampling tube and then is connected with the piston, and the sampling needle with the barb is fixed on the lower surface of the piston. The upper end and the lower end of the first elastic piece are respectively connected with the top surface of the sampling tube and the piston. The stabilizing part is fixed on the back of the inner cylinder in the shell, the lower end of the trigger rod sequentially and movably penetrates through the top surface of the shell and the stabilizing part and then is connected with the top surface of the cone, a circle of groove is formed in the side wall of the lower portion of the cone, and the cross section of the groove is arc-shaped. The upper end and the lower end of the second elastic part are respectively connected with the trigger rod and the stabilizing part. Cut a level setting in stabilizing part below, cut the piece and include two blade that have the cutting edge, its cross connection forms scissors column structure, the tail end of two blades passes through the third elastic component is connected, just the rear portion of two blades presss from both sides respectively in the recess of cone lower part both sides, at this moment the third elastic component is located the rear portion of cone and is in tensile state, the anterior part of two blades is located port below both sides under the inner tube respectively, so that make the anterior deciliter of two blades and carry out instantaneous shearing to the tumour tissue of port under the inner tube after the third elastic component resumes.

Furthermore, the blade of blade towards inner tube lower port is outside convex arc cutting edge to two at inner tube lower port both sides the blade merges the back can thoroughly cut off tumour tissue.

Further, the cone is formed by two cones which are vertically symmetrical to form a shuttle structure or a double-cone structure. The grooves are distributed at the waist part of the fusiform structure, and the grooves are circumferentially arranged around the waist part for one circle. Preferably, the bottom surface of the housing has an opening for the cone to enter and exit.

Furthermore, an integrally formed limiting plate is concentrically arranged on the bottom surface of the cone, and the diameter of the limiting plate is larger than that of the bottom surface of the cone.

Furthermore, an elastic force amplifying piece is fixed on the inner wall of the shell behind the trigger rod, and the middle part of the third elastic piece is hooked on the elastic force amplifying piece to enable the third elastic piece to be in a stretching state.

Furthermore, the elastic force amplifying piece is of an L-shaped structure which is horizontally arranged, the right end of the elastic force amplifying piece is fixed on the inner wall of the shell, and the middle part of the third elastic piece is hooked in the L-shaped structure.

Further, the first elastic piece, the second elastic piece and the third elastic piece are all springs. Wherein: the first elastic piece is sleeved on the push rod, and the upper end and the lower end of the first elastic piece are respectively connected with the top surface of the sampling tube and the upper surface of the piston. The second elastic piece is sleeved on the trigger rod, and the upper end and the lower end of the second elastic piece are respectively connected with the upper surfaces of the trigger rod and the stabilizing piece. And two ends of the third elastic piece are respectively connected with the tail ends of the two knife bodies.

Preferably, a connecting plate is fixed on the trigger rod, the connecting plate is positioned above the internal stabilizing part of the shell, and the upper end of the second elastic part is connected to the connecting plate.

Further, threaded connection between the upper end outer wall of sampling tube and the upper port inner wall of inner tube, just there is part in the upper port outside of inner tube in the upper end of sampling tube to make both can dismantle the connection in the time.

Furthermore, a connecting column is fixed on the bottom surface of the shell and is positioned behind the inner barrel. The two cutter bodies are provided with connecting holes which are inserted on the connecting column in a rotating manner, and the top end of the connecting column is connected with a nut, so that the two cutter bodies are connected in a cross manner to form a scissors-shaped structure.

Further, the outer wall of the upper part of the shell is provided with a flange so as to press the push rod or the trigger rod downwards in cooperation with fingers.

Furthermore, the stabilizing part is fixed between the outer wall of the lower part of the inner cylinder and the inner wall of the lower part of the shell, a through hole penetrates through the stabilizing part, the trigger rod penetrates through the through hole and then is connected with the top surface of the cone below the trigger rod, and the trigger rod can move up and down along the through hole.

Furthermore, the piston and the stabilizing piece are made of polytetrafluoroethylene materials, have the characteristic of lubrication and can improve the lubricating effect between the piston and the trigger rod.

Compared with the prior art, the invention at least comprises the following beneficial effects:

(1) the invention can realize the function of cutting off tumor tissues from the lower port of the sampling tube by using the shearing mechanism consisting of the trigger rod, the cone, the second elastic piece, the shearing piece and the third elastic piece, wherein the trigger rod, the cone and the second elastic piece form a smart triggering mechanism. After pressing down the recess that the trigger lever made the cone downstream make the blade of shearing piece break away from on the cone in the part, the conical surface characteristics of cone are convenient for satisfy the blade and make progress the technical requirement that slides fast under the restoring force effect of third elastic component, consequently, can break away from the back along the conical surface of cone fast to the trigger lever in the blade follow recess, and then the blade loses in the twinkling of an eye the effort of strutting, at this moment the third elastic component resumes in the twinkling of an eye and makes two blades fold in the twinkling of an eye and form powerful shearing force, can cut off tumor tissue from the lower port department of sampling pipe fast, makes its and the internal tumor tissue of patient break away from, prevents that traditional sampling device from needing to tear the traumatic surface that enlarges the sample of the in-process of tumor tissue sample, when bringing very big misery for the patient, still cause the hemorrhage problem of sample department large tracts of land easily. After the trigger rod is loosened, the trigger rod and the cone body move upwards under the action of the second elastic piece, and the rear parts of the two knife bodies are reset into the grooves on two sides of the lower part of the cone body again under the action of the cone body, so that multiple shearing operations can be performed conveniently, and tumor tissues can be completely sheared.

(2) After the tumor tissue is taken out of the patient by using the conventional sampling device, the tumor tissue sample is still stored in the sampling device, and the tumor tissue sample needs to be taken out from the sampling device again for pathological examination. Because the volume restriction problem of sampling device, the tumour tissue that hooks on the sampling needle in sampling device among the traditional sampling device is difficult for taking off, leads to sample work efficiency low, spend long time. The sampling tube is detachably connected with the sampling tube through the tube body structure in the special shape formed by the shell and the inner tube, so that the tumor tissue can be sampled, the sampling tube can be conveniently detached, then the push rod is pressed to enable the tumor tissue carried by the sampling needle to extend out of the sampling tube, the tumor tissue on the sampling needle can be conveniently taken out of the sampling tube, and the sampling efficiency is effectively improved.

(3) According to the invention, the stabilizing piece is arranged at the lower part of the trigger rod, so that the problems that the cone is unstable due to the swinging of the trigger rod in the use process, and the shearing is influenced by the shaking of the tool body are prevented. The reason for this is that: at the moment when the shearing part is triggered, the third elastic part recovers the vibration caused by the moment, the triggering rod and the cone are easy to swing, so that multiple shearing operations need to be executed, at the moment, the two knife bodies need to be reset into the grooves of the cone again, but due to the influence of the swinging of the cone, the shearing part collides with the shearing part violently, so that the shearing part is unstable, and the shearing effect on tumor tissues is influenced.

(4) The tumor puncture sampling device further skillfully utilizes the limited space in the shell through the elastic amplification piece to further amplify the pulling force of the third elastic piece on the two knife bodies, provides stronger instantaneous shearing force for the knife bodies when the third elastic piece is recovered, and improves the shearing effect.

(5) According to the invention, the cutting edge of the shearing part is arranged into the arc-shaped structure protruding outwards, so that the problem that the two cutter bodies cannot be completely folded to cut off part of tumor tissues due to the trigger rod is solved. The reason is that the rear part of the cutter body of the cutting piece is blocked by the trigger rod when being folded, so that the front cutting edge part of the cutter body cannot be completely folded, and partial tumor tissues cannot be cut, and further, the tumor tissues are still pulled when the puncture tube is pulled out of the body of a patient, so that the wound surface is enlarged, and the pain of the patient is increased.

(6) According to the invention, the cone is provided with the shuttle-shaped structure or the double-cone structure formed by the up-and-down symmetry of the two cones, or the bottom surface of the cone is provided with the limiting plate, so that when the rear part of the cutter body of the shearing part is separated from the groove and enters the lower part of the cone, the cutter body can be conveniently and quickly reset into the groove by pressing the trigger rod, and the problem that the cutter body of the shearing part cannot be sheared when the cutter body is positioned below the cone due to misoperation or mistaken collision is solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

Fig. 1 is a schematic structural diagram of a tumor puncture sampling device in an embodiment.

Fig. 2 is an upper sectional view of the outer case in the embodiment.

Fig. 3 is a schematic view of the internal structure of the tumor puncture sampling device in the front view state in the embodiment.

Fig. 4 is a schematic view of the internal structure of the tumor puncture sampling device in the right-side view state in the embodiment.

Fig. 5 is a lower sectional view of the housing in the embodiment.

FIG. 6 is a front view of the cone in the embodiment.

Fig. 7 is a schematic view of the internal structure of the tumor puncture sampling device in a shearing state according to the embodiment.

Fig. 8 is a lower sectional view of another housing in the embodiment.

Fig. 9 is a sectional view of another elasticity increasing member in the embodiment.

FIG. 10 is a front view of another cone in the example.

The numerical designations in the above drawings represent, respectively: 1-shell, 2-puncture tube, 3-inner cylinder, 4-sampling tube, 5-piston, 6-push rod, 7-sampling needle, 8-first elastic part, 9-stabilizing part, 10-trigger rod, 11-cone, 12-second elastic part, 13-shearing part, 14-third elastic part, 15-groove, 16-opening, 17-elasticity amplifying part, 18-connecting plate, 19-connecting column, 20-nut, 21-flange and 22-limiting plate.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

For convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate that the directions of movement are consistent with those of the drawings, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element needs to have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. The tumor puncture sampling device of the invention will be described in detail with reference to the drawings and specific embodiments.

With reference to fig. 1 to 7, there is illustrated a tumor puncture sampling device comprising: the puncture tube comprises a shell 1, a puncture tube 2, an inner cylinder 3, a sampling tube 4, a piston 5, a push rod 6, a sampling needle 7, a first elastic element 8, a stabilizing element 9, a trigger rod 10, a cone 11, a second elastic element 12, a shearing element 13 and a third elastic element 14. Wherein:

the shell 1 is a plastic round pipe with a top surface and a bottom surface, and a connecting port is arranged on the bottom surface of the shell 1; puncture pipe 2 is the stainless steel pipe that the lower extreme sharped, and it is pegged graft on the connector and perpendicular to shell 1's bottom surface to be convenient for puncture when the sample, be convenient for simultaneously the sample needle 7 gets into puncture pipe 2 sample.

Inner tube 3 is the plastics pipe, and its vertical setting is in shell 1, and the last port of inner tube 3 and the top surface fixed connection of shell 1, have the through-hole with the inner chamber intercommunication of inner tube 3 on the top surface of shell 1, so that the installation sampling tube 4. The front side wall of the inner cylinder 3 is tangentially connected with the front inner wall of the shell 1, so that the limited space in the shell 1 is fully utilized, and the shearing mechanism is conveniently installed in a matched mode.

Sampling tube 4 is the plastics pipe, and its lower extreme inserts in inner tube 3 from the top surface through-hole of shell 1, just have the external screw thread on the upper end outer wall of sampling tube 4, have on the upper end port inner wall of inner tube 3 with this external screw thread complex internal thread to make the upper end and the 3 threaded connection of inner tube of sampling tube 4, realize dismantling of both and connect. Meanwhile, the upper end of the sampling tube 4 is partially positioned outside the upper port of the inner cylinder 3, so that the sampling tube 4 can be taken out of the inner cylinder 3 after sampling from the body of a patient, and tumor tissues on the sampling needle 7 in the sampling tube 4 can be taken down for inspection. This is because the tumor tissue sample is still stored in the sampling device after the tumor tissue is taken out of the patient by the sampling device, and the operator is required to take out the tumor tissue sample again from the sampling device before the tumor tissue sample can be sent for pathological examination. Because sampling device's volume restriction problem, the tumour tissue that hooks on the sampling needle among the traditional sampling device in the sampling device is difficult for taking off, leads to sample work efficiency low, spend long time, still easily leads to pathological tissue to be destroyed by the manual nature in the process of taking out. The body structure of the special shape that shell 1 and inner tube 3 constitute is passed through to this embodiment, can dismantle with its and sampling tube 4 and be connected the back and both can satisfy the sample of tumour tissue, can conveniently dismantle again, then presses down push rod 6 and makes sampling needle 7 carry tumour tissue and stretch out sampling tube 4, can conveniently take out the tumour tissue on the sampling needle 7 from sampling tube 4, has improved sampling efficiency effectively.

The lower ports of the inner cylinder 3 and the sampling tube 4 are suspended above the bottom surface of the shell 1, so that the cutting edge part of the shearing part 13 can rapidly shear tumor tissues from the lower port of the sampling tube 4. The piston 5 is a circular block and is positioned in the inner cavity of the sampling tube 4, the lower end of the push rod 6 movably penetrates through the top surface of the sampling tube 4 and then is connected with the upper surface of the piston 5, and the sampling needle 7 with a barb is fixed on the lower surface of the piston 5. The first elastic member 8 is a spring, which is sleeved on the push rod 6, and the upper end and the lower end of the first elastic member 8 are respectively connected with the top surface of the sampling tube 4 and the upper surface of the piston 5. When the push rod 6 is pressed downwards to enable the sampling needle 7 to enter the puncture tube 2 for sampling, the first elastic part 8 is in a compressed state, and the sampling needle 7 can automatically withdraw from the puncture tube 2 with the tumor tissue sample by loosening the first elastic part 8 after the sampling is finished. At this time, the shearing part 13 is utilized to shear the tumor tissue from the lower port of the sampling tube 4, so that the tumor tissue is separated from the tumor tissue in the body of the patient, the wound surface of the traditional sampling device is prevented from being enlarged in the process of pulling off the tumor tissue sample, great pain is brought to the patient, and the problem of large-area bleeding of the sampling part is easily caused.

The stabilizer 9 is disposed behind the inner cylinder 3 in the housing 1, and the stabilizer 9 is fixed between the lower outer wall of the inner cylinder 3 and the lower inner wall of the housing 1, and the stabilizer 9 has a through hole therethrough, which has a diameter larger than that of the trigger lever 10, so that the trigger lever 10 can move up and down along the through hole. The lower end of the trigger rod 10 passes through the through hole and then is connected with the top surface of the cone 11 below. The upper end of the trigger rod 10 penetrates through the top surface of the shell 1 and then is positioned outside the shell, so that after the sampling of the sampling needle 7 is completed, the shearing piece 13 is triggered by pressing the trigger rod 10 to shear the tumor tissue from the lower port of the sampling tube 4, and the tumor tissue is separated from the tumor tissue in the body of a patient.

The second elastic member 12 is a spring, which is sleeved on the trigger rod 10, and the upper end and the lower end of the spring are respectively connected with the upper surfaces of the trigger rod 10 and the stabilizing member 9. The second elastic element 12 mainly functions to keep the cutting element 13 in a state of being spread by the cone 11 before being cut, so as to be convenient for triggering to carry out instantaneous cutting at a later stage. If the second elastic element 12 is not provided to keep the trigger rod 10 at a specific height and state, the trigger rod 10 is in a more free state, and the trigger rod 10 with the cone 11 moves downwards to trigger the shearing element 13 due to a small-amplitude mis-collision or other actions in the sampling process, and if the sampling needle 7 is located below the lower port of the sampling tube 4, the phenomenon that the shearing element 13 shears the sampling needle 7 made of a metal material occurs, and the sampling needle 7 and the shearing element 13 are easily damaged. The probability that the shearing part 13 is triggered due to mistaken collision can be effectively reduced through the action of the second elastic part 12, so that the trigger rod 1 is kept in a relatively more stable state, and the shearing part 13 can be triggered conveniently and quickly to shear when the tumor tissue needs to be sheared by pressing the trigger rod 1 through the fingers of an operator.

As for the cone 11, which is an important part for realizing the triggering of the shearing member 13, the cone 11 has a truncated cone-shaped structure, the upper top surface of which is concentrically connected with the lower end of the triggering rod 10, and the lower side wall of the cone 11 is provided with a circle of grooves 15, the cross section of which is arc-shaped (refer to fig. 6), so that the blade of the shearing member 13 can smoothly slide out of the grooves 15, and the clamping of the shell is prevented.

The shearing part 13 is horizontally arranged below the stabilizing part 9 and the lower port of the sampling tube 4. Specifically, the shearing part 13 comprises two blade bodies with blades, a connecting column 19 is fixed on the bottom surface of the shell 1, and the connecting column 19 is positioned behind the inner barrel 3. The two cutter bodies are provided with connecting holes which are inserted on the connecting column 19 in a rotating mode so that the cutter bodies can rotate around the connecting column 19 to realize the opening and closing of the two cutter bodies, and the top end of the connecting column 19 is connected with a nut 20 to enable the two cutter bodies to be connected in a cross mode to form a scissors-shaped or X-shaped structure. When the two knife bodies are instantaneously switched from the opening state to the closing state, the aim of cutting off tumor tissues from the lower port of the sampling tube 4 can be fulfilled.

In order to instantaneously convert the two blades from the open state to the closed state. Referring to fig. 5, the two blades are connected at their ends by the third elastic member 14, and the third elastic member 14 is a spring, and two ends of the spring are connected to the ends of the two blades, respectively. When the two knife bodies are in an open state, the rear parts of the two knife bodies are respectively clamped in the grooves 15 on the two sides of the lower part of the cone 11, under the action of the cone 11, the rear parts of the two knife bodies are propped open, the third elastic part 14 is positioned on the rear part of the cone 11 and is in a stretching state, and the front parts of the two knife bodies are respectively positioned on the two sides below the lower port of the inner cylinder 3, so that the front parts of the two knife bodies are separated and combined after the third elastic part 14 is recovered, and tumor tissues at the lower port of the inner cylinder 3 are instantaneously sheared. Referring to fig. 7, pressing the trigger lever 10 to make the cone 11 move downwards, and then making the back parts of the two knife bodies break away from the groove 15, because of the conical characteristic of the cone 11, the knife bodies can quickly slide towards the trigger lever 10 along the conical surface of the cone 11 after breaking away from the groove 15, and then the knife bodies lose the propping action force instantly, at this time, the third elastic part 14 instantly recovers to make the two knife bodies fold instantly to form a strong shearing force, so that the tumor tissue can be quickly cut off from the lower port of the sampling tube 4, and the tumor tissue in the patient body breaks away from the trigger lever, thereby preventing the traditional sampling device from expanding the wound surface of the sample in the process of tearing off the tumor tissue sample, bringing great pain to the patient and also easily causing the bleeding problem of the sampling place. The sampling needle 7 extracts the puncture tube 2 from the tumor tissue of the patient after sampling.

In addition, the conical surface characteristic of the cone 11 is convenient for meeting the technical requirement that the knife body slides upwards quickly under the restoring force action of the third elastic part 14, and the instant shearing of the shearing part 13 is realized. After the trigger rod 10 is released, the trigger rod 10 and the cone 11 act upwards under the action of the second elastic piece 12, and the rear parts of the two knife bodies are reset into the grooves 15 on the two sides of the lower part of the cone 11 under the action of the cone 11, so that multiple shearing operations can be performed, and tumor tissues are ensured to be completely sheared.

The stabilizer 9 is arranged at the lower part of the trigger rod 10, so that the problem that the trigger rod 10 swings to cause instability of the cone 11 and disturb the cutter body to shake to influence shearing in the use process can be solved. The reason for this is that: at the moment when the cutting member 13 is triggered, the trigger rod 10 and the cone 11 are easily caused to swing due to the vibration caused by the instant recovery of the third elastic member 14, so that a plurality of cutting operations need to be performed, at this time, the two blades need to be reset into the groove 15 of the cone 11 again, but due to the swing effect of the cone 11, the two blades violently collide with the cutting member 13 to make the cutting member 13 unstable, and the cutting effect on tumor tissues is affected.

In a better embodiment, the piston 5 and the stabilizing member 9 are made of teflon, and have a lubricating characteristic, so that the lubricating effect between the piston 5 and the trigger rod 10 can be improved, the sliding resistance between the piston 5 and the trigger rod 10 can be reduced, and the sampling efficiency can be improved.

In a better embodiment, under the condition of ensuring that the trigger rod 10 can be used normally, the diameter of the trigger rod 10 is as small as possible, so that when the cone 11 runs to the lower part of the two blades, and the two blades are clamped on the trigger rod 10, the problem that the cutting edges at the front parts of the two blades cannot be completely folded to cut off partial tumor tissues due to the limitation of the trigger rod 10 on the two blades is solved. Therefore, the trigger rod 10 can be made of a stainless steel rod, an aluminum alloy rod or other metal rods, so that the use strength is ensured.

In a better embodiment, referring to fig. 8, the blades of the cutting element 13 facing the lower end of the inner cylinder 3 are arc-shaped blades protruding outwards, which can ensure that the blades of the two blades of the cutting element 13 are partially folded to ensure complete cutting of tumor tissue, overcoming the problem that the trigger rod 10 can not completely fold the two blades to cut off part of tumor tissue. This is because the rear part of the blade body of the cutting member 13 is obstructed by the trigger lever 10 when the blade body is folded, so that the front blade part of the blade body cannot be completely folded, and a part of tumor tissues cannot be cut, and further, when the puncture tube 2 is pulled out of the body of the patient, the tumor tissues are still pulled, so that the wound surface is enlarged, and the pain of the patient is increased.

In a better embodiment, an elastic force amplifying piece 17 is fixed on the inner wall of the shell 1 behind the trigger rod 10. Referring to fig. 9, the elastic force enlarging element 17 is a horizontally disposed "L" shaped structure, the right end of which is fixed on the inner wall of the housing 1, and the middle part of the third elastic element 14 is hooked in the "L" shaped structure to make the third elastic element 14 in a stretched state. In the embodiment, the elastic force amplifying piece 17 skillfully utilizes the limited space in the shell 1 to further amplify the pulling force of the third elastic piece 14 to two blade bodies, so that stronger instantaneous shearing force is provided for the blade bodies when the third elastic piece 14 is recovered, and the shearing effect is improved.

In another embodiment, referring to fig. 4 or 7, a connecting plate 18 is fixed on the triggering lever 10, the connecting plate 18 is located above the stabilizing member 9 in the housing 1, and the upper end of the second elastic member 12 is connected with the connecting plate 18. It will be appreciated that the connection plate 18 may be of any suitable shape as long as it can be accommodated within the housing 1 without interfering with the operation of the firing bar 10.

In another embodiment, referring to fig. 1, 3, 4 or 7, the housing 1 has a flange 21 on the upper outer wall, and in use, the push rod 6 or the trigger lever 10 can be pressed down by the thumb of the operator by placing the middle finger and the index finger of the operator under the flange 21 and clamping the upper outer wall of the housing 1, thereby triggering the cutting member 13.

In another embodiment, referring to fig. 7, the cone 11 is formed by two cones which are vertically symmetrical to form a shuttle structure or a double cone structure. The grooves 15 are distributed at the waist of the shuttle structure, and the grooves 15 are circumferentially arranged around the waist. The cone 11 of this construction allows the blades of the cutter 13 to be conveniently and quickly reset into the recess 15 by depressing the trigger lever 10 when an operator error or mis-bumping causes the rear portions of the blades to disengage from the recess 15 and enter beneath the cone 11. For this purpose, the housing 1 also has an opening 16 (see fig. 5 and 7) on the bottom for the cone 11 to enter and exit, since the lower part of the cone 11 of this shuttle-shaped structure is increased in size, which needs to be moved downwards sufficiently in cooperation with the opening 16 to ensure that the two blades of the shear member 13 can obtain sufficient shear force.

In another embodiment, referring to fig. 10, an integrally formed limiting plate 22 is concentrically disposed on the bottom surface of the cone 11, and the diameter of the limiting plate 22 is larger than that of the bottom surface of the cone 11 to form a stop for the blades of the shearing part 13, so as to prevent the situation that the two blades of the shearing part 13 enter the lower side of the cone 11 from the separation groove 15 due to misoperation or accidental collision, so that the shearing part 13 cannot be reset, which may cause the problem that the sampling device cannot be used any more. This provides a further space saving with respect to the cone 11 of the double cone construction.

Finally, it should be understood that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention. Although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.

Claims

1. A tumor puncture sampling device, comprising:

a housing;

the puncture tube is vertically fixed on the bottom surface of the shell, and the inner cavities of the puncture tube and the shell are communicated;

the inner cylinder is vertically arranged right above the puncture tube in the shell, and the upper port of the inner cylinder is positioned at the top surface of the shell;

the sampling tube is vertically inserted into the inner cylinder and is detachably connected with the inner cylinder, and the lower ports of the inner cylinder and the sampling tube are suspended above the bottom surface of the shell;

the lower end of the push rod movably penetrates through the top surface of the sampling tube and then is connected with the piston, and the sampling needle with a barb is fixed on the lower surface of the piston;

the upper end and the lower end of the first elastic piece are respectively connected with the top surface of the sampling tube and the piston;

a stabilizer fixed in the housing behind the inner barrel;

the lower end of the trigger rod sequentially and movably penetrates through the top surface of the shell and the stabilizing piece and then is connected with the top surface of the cone, a circle of groove is formed in the side wall of the lower portion of the cone, and the cross section of the groove is arc-shaped;

the upper end and the lower end of the second elastic part are respectively connected with the trigger rod and the stabilizing part;

the cutting piece is horizontally arranged below the stabilizing piece and comprises two cutter bodies with cutting edges, and the two cutter bodies are connected in a cross mode to form a scissor-shaped structure; the tail ends of the two knife bodies are connected through a third elastic piece, the rear parts of the two knife bodies are respectively clamped in the grooves on two sides of the lower part of the cone, the third elastic piece is located on the rear part of the cone and is in a stretching state, and the front parts of the two knife bodies are respectively located on two sides below the lower port of the inner cylinder.

2. The tumor puncture sampling device of claim 1, wherein the blade of the blade body facing the lower end port of the inner barrel is an arc-shaped blade protruding outwards.

3. The tumor puncture sampling device according to claim 1, wherein an elastic force amplifying member is further fixed on the inner wall of the housing behind the trigger rod, and the middle part of the third elastic member is hooked on the elastic force amplifying member to make the third elastic member in a stretching state; preferably, the elastic force amplification piece is of a horizontally arranged L-shaped structure, the right end of the elastic force amplification piece is fixed on the inner wall of the shell, and the middle part of the third elastic piece is hooked in the L-shaped structure.

4. The tumor puncture sampling device according to claim 1, wherein the cone is a fusiform structure formed by two cones which are vertically symmetrical; the grooves are distributed at the waist part of the fusiform structure, and the grooves surround the waist part for one circle in the circumferential direction; preferably, the bottom surface of the shell is provided with an opening for the cone to enter and exit;

or the bottom surface of the cone is concentrically provided with a limiting plate, and the diameter of the limiting plate is larger than that of the bottom surface of the cone.

5. The tumor puncture sampling device according to claim 1, wherein the stabilizer is fixed between the lower outer wall of the inner cylinder and the lower inner wall of the housing, and has a through hole therethrough, the trigger rod is connected to the top surface of the cone below after passing through the through hole, and the trigger rod can move up and down along the through hole.

6. The tumor puncture sampling device according to any one of claims 1-5, wherein the piston and the stabilizer are made of Teflon.

7. The puncture tumor sampling device according to any one of claims 1-5, wherein the outer wall of the upper end of the sampling tube is screwed with the inner wall of the upper port of the inner barrel, and the upper end of the sampling tube is partially located outside the upper port of the inner barrel.

8. The tumor puncture sampling device according to any one of claims 1-5, wherein a connection post is fixed on the bottom surface of the housing, and the connection post is positioned behind the inner barrel; the two cutter bodies are provided with connecting holes which are inserted on the connecting column in a rotating manner, and the top end of the connecting column is connected with a nut, so that the two cutter bodies are connected in a cross manner to form a scissors-shaped structure.

9. The tumor puncture sampling device according to any one of claims 1-5, wherein the housing has a flange on the upper outer wall thereof.

10. The tumor puncture sampling device of any one of claims 1-5, wherein the first, second, and third elastic members are springs; wherein: the first elastic piece is sleeved on the push rod, and the upper end and the lower end of the first elastic piece are respectively connected with the top surface of the sampling tube and the upper surface of the piston; the second elastic piece is sleeved on the trigger rod, and the upper end and the lower end of the second elastic piece are respectively connected with the upper surfaces of the trigger rod and the stabilizing piece; two ends of the third elastic piece are respectively connected with the tail ends of the two knife bodies; preferably, a connecting plate is fixed on the trigger rod, the connecting plate is positioned above the internal stabilizing part of the shell, and the upper end of the second elastic part is connected to the connecting plate.