Coaxial puncture cannula device, biopsy needle suite and use method

Abstract

The invention relates to the technical field of biopsy equipment, and provides a coaxial puncture cannula device, a biopsy needle suite and a using method.The coaxial puncture cannula device is used for being connected with a biopsy needle and comprises a puncture tube body, a liquid injection tube, a liquid outlet tube, a liquid outlet tube, a liquid outlet tube and a liquid outlet tube, and the puncture tube body is provided with a puncture channel; the handle connecting part is arranged on the puncture tube body; the pressing part is connected with the handle connecting part; the liquid injection part is arranged on the pressure applying side of the pressure applying part, and the liquid injection part is used for containing hemostatic; the handle connecting part is used for connecting a handle of the biopsy needle and has a push-in state and a pull-out state; in the push-in state, the handle connecting part pushes the biopsy needle to be inserted into the puncture channel, and the hemostatic in the liquid injection part is not pushed out; and in the pulling-out state, the handle connecting part pulls the biopsy needle out of the puncture channel and drives the pressure applying part to perform transmission so as to push out the hemostatic in the liquid injection part. The problems that in the prior art, the hemostasis operation is long and the hemostasis effect is not ideal due to pressing operation of manual hemostasis are solved.

Description

Technical Field

[0001] The present application relates to the technical field of biopsy equipment, and more specifically, to a coaxial puncture cannula device, a biopsy needle kit, and a method of use. Background Art

[0002] In the field of medical device technology, biopsy needles are widely used to obtain tissue samples from human soft tissue for pathological examination and diagnosis.

[0003] In the prior art, a biopsy needle usually consists of an outer sleeve and an inner core needle. During the sampling process, the inner core needle needs to be pulled out, leaving the outer sleeve to form a channel, and then the biopsy needle is inserted into the outer sleeve for sampling. After sampling, the puncture site needs to be manually pressed to stop bleeding. The pressing time is long, generally 8-20 minutes, which increases the postoperative recovery time. In addition, the pressing method of hemostasis acts more on the human epidermis to stop bleeding, and has no hemostatic effect on the puncture cavity in the punctured internal organs. Pressing to stop bleeding may cause bleeding in the internal organs, increase the possibility of adverse symptoms during the operation, and prolong the patient's recovery time.

[0004] Conventional biopsy needles require manual pressure to stop bleeding after sampling, which results in a long bleeding operation time and unsatisfactory bleeding effect. Therefore, the existing technology needs to be improved and developed. Summary of the Invention

[0005] The purpose of the present application is to provide a coaxial puncture cannula device, a biopsy needle kit and a method of use, which solve the problem that the pressing operation of manual hemostasis in the prior art results in a long hemostasis operation and unsatisfactory hemostasis effect.

[0006] To achieve the above objectives, the technical solution adopted in this application is: In one aspect, the present application provides a coaxial puncture cannula device for connecting to a biopsy needle, wherein the coaxial puncture cannula device comprises: a puncture tube body, the puncture tube body having a puncture channel extending axially therethrough, and a liquid injection channel provided on the puncture tube body, the puncture tube body being configured to be inserted into a patient's body; A handle connecting portion, which is arranged on the puncture tube body; a pressure-applying portion connected to the handle connecting portion; A liquid injection part, the liquid injection part is arranged on the pressure-applying side of the pressure-applying part, the liquid injection part is used to accommodate the hemostatic agent, and the liquid outlet of the liquid injection part is connected to the liquid injection pipeline; The handle connecting portion is used to connect to the handle of the biopsy needle, and has a pushed-in state and a pulled-out state by pushing and pulling the biopsy needle; In the pushing state, the handle connecting part pushes the biopsy needle into the puncture channel, and the pressure applying part is in a non-transmission state, without pushing out the hemostatic agent in the injection part; In the pulled-out state, the handle connecting portion pulls the biopsy needle out of the puncture channel and drives the pressure applying portion to transmit, thereby pushing out the hemostatic agent in the injection portion.

[0007] Optionally, the pressure applying portion includes: An active member connected to the handle connecting portion and moved by the drive of the handle connecting portion; A driving gear meshes with the driving member; A one-way bearing comprises a first ring body and a second ring body. The first ring body rotates relative to the second ring body when rotating forward and is fixed relative to the second ring body when rotating reversely. The driving gear is connected to the first ring body of the one-way bearing. A driven gear connected to the second ring of the one-way bearing; A push piece, the push piece is engaged with the driven gear; In the pushed-in state, the handle connecting part drives the active member to drive the one-way bearing to rotate forward; in the pulled-out state, the handle connecting part drives the active member to drive the one-way bearing to rotate reversely.

[0008] Optionally, a return elastic member is connected to the pushing member, and the return elastic member is used to apply an elastic force to the pushing member away from the liquid injection portion.

[0009] Optionally, the coaxial puncture cannula device further comprises: a puncture stent, the puncture tube body is arranged at the distal end of the puncture stent, and the handle connection portion is axially movably arranged at the proximal end of the puncture stent; The one-way bearing is rotatably arranged on the puncture bracket, the active member is movably arranged on the puncture bracket along the axial direction, and the pushing member is movably arranged on the puncture bracket along the axial direction.

[0010] Optionally, the liquid injection portion includes: a liquid storage tube, the distal end of the liquid storage tube being connected to the liquid injection pipeline; The piston part is movably arranged in the liquid storage tube and pushes out the hemostatic agent in the liquid storage tube under the push of the pressure-applying part.

[0011] Optionally, the puncture tube body is connected with a butt joint, which is connected to the injection pipe; The clamping part is detachably connected to the liquid injection part and is detachably connected to the docking head.

[0012] Optionally, the injection pipe extends to the distal end of the puncture tube body and is connected to the puncture channel; A one-way blocking piece is provided at the liquid outlet at the distal end of the liquid injection pipe, and the one-way blocking piece is used to discharge water in one direction toward the puncture channel; Optionally, the one-way blocking member includes: a blocking block movably arranged at the liquid outlet; A sealing elastic member, one end of which is connected to the puncture tube body, and the other end is connected to the blocking block, which blocks the liquid outlet through the elastic force exerted by the sealing elastic member; and a safety block, which is arranged on a side of the blocking block away from the liquid outlet and extends into the puncture channel; The safety block pushes the blocking block to squeeze the liquid outlet through the squeezing of the biopsy needle in the puncture channel.

[0013] Optionally, the handle connection portion includes: an adjustment plate, which is movably arranged along the axial direction and is located at the proximal end of the puncture tube body; A clamping fork, which is arranged at the distal end of the adjusting plate; a splint, the splint being arranged at the proximal end of the adjusting plate; The distance between the clamping fork and the clamping plate is adjusted by an adjusting plate to adapt to the handle length of the biopsy needle.

[0014] On the other hand, the present application also provides a biopsy needle kit, which includes the coaxial puncture cannula device, the puncture needle and the biopsy needle as described above; The puncture needle is used to penetrate the puncture channel of the coaxial puncture cannula device to puncture the patient's skin and insert the puncture tube body into the patient's body; The handle of the biopsy needle is connected to the handle connecting portion of the coaxial puncture sleeve device, and the biopsy needle is passed through the puncture channel in the puncture tube body to enter the patient's body tissue for sampling.

[0015] In a third aspect, the present application further provides a method for using a coaxial puncture cannula device, which is applied to the coaxial puncture cannula device described above, wherein the method for using comprises the steps of: The puncture needle is inserted into the puncture tube body of the coaxial puncture cannula device to pierce the patient's skin and insert the puncture tube body into the patient's body; Pull out the puncture needle, leaving the puncture tube body on the patient's body; Connect the handle of the biopsy needle to the handle connecting portion of the coaxial puncture cannula device, and insert the biopsy needle into the puncture channel of the puncture cannula body; Push the handle connection part toward the patient to drive the biopsy needle along the puncture channel and insert it into the patient's body; Start the biopsy needle to collect samples and close the biopsy needle after the sampling is completed; The handle connecting part is pushed away from the patient, driving the biopsy needle to be pulled out along the puncture channel. At the same time, the handle connecting part drives the pressure-applying part to move toward the injection part and squeeze the hemostatic agent in the injection part, so that the hemostatic agent flows into the patient's body through the injection pipe.

[0016] The coaxial puncture cannula device, biopsy needle kit, and method of use provided by the present application have at least the following beneficial effects: after the puncture tube body is placed on the patient's body, the handle of the biopsy needle is connected to the handle connecting portion of the coaxial puncture cannula device, and the biopsy needle is inserted into the puncture channel of the puncture tube body. The handle connecting portion is then pushed toward the patient, driving the biopsy needle along the puncture channel and inserted into the patient's body. At this time, the coaxial puncture cannula device is in a pushing state. In this state, during the process of the handle connecting portion pushing the biopsy needle, although the hand connecting portion is connected to the pressure applying portion, the pressure applying portion is in a non-transmission state and does not push out the hemostatic agent in the injection portion. The biopsy needle is activated to collect a sample and is closed after the sampling is completed. Before and during the sampling process of the biopsy needle, the hemostatic agent will not be pushed out by the pressure applying portion. After the biopsy needle has finished sampling, the doctor pushes the handle connecting part directly away from the patient, driving the biopsy needle to be pulled out along the puncture channel. At this time, the coaxial puncture cannula device is in a pulled-out state. In this state, the handle connecting part drives the pressure-applying part to move toward the injection part, and squeezes the hemostatic agent in the injection part, causing the hemostatic agent to flow into the patient's body through the injection pipe, completing hemostasis. Therefore, during the process of pulling out the biopsy needle, the coaxial puncture cannula device can automatically complete the injection of the hemostatic agent, and the hemostatic agent can be used to stop bleeding in time, reducing the hemostasis time and improving the hemostasis effect. In addition, when using it, the doctor only needs to complete the insertion and removal operation of the biopsy needle. After the sampling is completed, the coaxial puncture cannula device can automatically complete the injection of the hemostatic agent, making the hemostasis operation process after the biopsy simpler, reducing the tediousness of the manual hemostasis operation, and thus improving the convenience and safety of the biopsy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 A schematic diagram of the structure of a coaxial puncture cannula device provided in an embodiment of the present application when connected to a biopsy needle; Figure 2 A cross-sectional view of a coaxial puncture cannula device provided in an embodiment of the present application during use, wherein Figure 2 Figure (a) is a partial cross-sectional view of the coaxial puncture cannula device before biopsy. Figure 2 Figure (b) is a partial cross-sectional view of the coaxial puncture cannula device connected to the puncture needle during puncture. Figure 2 Figure (c) is a partial cross-sectional view of the coaxial puncture cannula device connected to the biopsy needle during biopsy; Figure 3This is a left side view of a coaxial puncture cannula device provided in an embodiment of the present application when in use, wherein Figure 3 The middle (d) figure is the left view of the pushed-in state. Figure 3 The middle (e) figure is the left view of the pulled-out state; Figure 4 A cross-sectional view of a coaxial puncture cannula device provided in an embodiment of the present application during biopsy; Figure 5 for Figure 4 A magnified view of point A; Figure 6 An exploded view of a coaxial puncture cannula device provided in an embodiment of the present application during biopsy; Figure 7 for Figure 6 Enlarged view of point B; Figure 8 A partial cross-sectional view of a pressure-applying portion of a coaxial puncture cannula device provided in an embodiment of the present application; Figure 9 A schematic structural diagram of a coaxial puncture cannula device provided in an embodiment of the present application when connected to a biopsy needle from another perspective; Figure 10 A partial cross-sectional view of a puncture tube body of a coaxial puncture cannula device provided in an embodiment of the present application during biopsy; Figure 11 A left side view of another structure of a coaxial puncture cannula device provided in an embodiment of the present application during use.

[0019] Among them, the reference numerals in the figures are: 10. Biopsy needle; 11. Handle; 20. Puncture needle; 100. Puncture tube; 110. Puncture channel; 120. Injection pipe; 121. Liquid outlet; 130. One-way blocking member; 131. Blocking block; 132. Blocking elastic member; 133. Safety block; 200. Puncture bracket; 210. Guide hole; 220. Guide groove; 221. Mounting groove; 230. Fixing column; 240. Docking joint; 250. Clamping portion; 300. Handle connecting portion; 310. Adjustment plate; 320. Clamping fork; 33 0. Clamp; 331. Hinge; 400. Pressure-applying portion; 410. Active member; 411. Active slider; 412. Active rack; 420. Active gear; 430. One-way bearing; 431. First ring body; 432. Second ring body; 440. Driven gear; 441. Sleeve; 450. Push member; 451. Driven slider; 452. Driven rack; 453. Push rod; 454. Mounting boss; 460. Return elastic member; 500. Liquid injection portion; 510. Liquid storage tube; 520. Piston portion. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0021] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be located directly or indirectly on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on this technical solution. The terms "first" and "second" are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, unless otherwise clearly and specifically defined.

[0022] Existing biopsy needles require manual hemostasis after sampling, which is not only cumbersome and time-consuming, but also increases the postoperative recovery time. Moreover, the manual pressure hemostasis method only acts on the epidermis of the human body and has no hemostatic effect on the punctured cavity of the internal organs, which may cause bleeding in the internal organs and prolong the patient's recovery time. In addition, existing biopsy needles are usually unable to achieve automatic hemostasis after biopsy, and cannot improve the convenience and safety of biopsy operations. Therefore, this solution proposes the following embodiments to solve the above problems. The specific embodiments are as follows: Example 1 like Figure 1 、 Figure 3 As shown, this embodiment provides a coaxial puncture cannula device for connecting a biopsy needle 10, wherein the coaxial puncture cannula device mainly comprises: a puncture tube body 100, a handle connecting portion 300, a pressure applying portion 400 and a liquid injection portion 500. Figure 1 、 Figure 2 As shown in Figure (a), the puncture tube body 100 has a puncture channel 110 that runs through the axial direction, and a liquid injection pipe 120 is provided on the puncture tube body 100. The puncture tube body 100 is used to be inserted into the patient's body. For the convenience of structural description, the puncture tube body 100 is cylindrical and extends a long length along the axial direction. The end inserted into the patient's body during use is the distal end, and the end held by the doctor is the proximal end. Figure 2As shown in Figures (a) and (b), in the specific structure, the puncture tube body 100 is usually equipped with a puncture needle 20. Before inserting the puncture tube body 100 into the patient's body, the puncture needle 20 is first inserted into the puncture channel 110 of the puncture tube body 100 so that the puncture needle 20 protrudes from the distal end of the puncture tube body 100. In this way, it is easier to pierce the patient's skin through the puncture needle 20, thereby guiding the puncture tube body 100 to be inserted into the patient's body. Then, the puncture needle 20 is withdrawn and the puncture tube body 100 is left in the patient's body. Figure 2 As shown in Figure (c), it is convenient for the biopsy needle 10 to directly pass through the puncture channel 110 and enter the patient's body for sampling. Figure 1 、 Figure 3 、 Figure 4 As shown, the handle connecting portion 300 is arranged on the puncture tube body 100 through the puncture bracket 200; the puncture bracket 200 can be fixedly arranged at the proximal end of the puncture tube body 100, and the handle connecting portion 300 is movably arranged on the puncture bracket 200 along the axial direction, so that the handle connecting portion 300 can move in the direction of the distal end and the proximal end. The handle connecting portion 300 is used to connect to the handle 11 of the biopsy needle 10, so that the biopsy needle 10 can be driven to move along the distal end and the proximal end. The pressure-applying portion 400 is connected to the handle connecting portion 300, and the pressure-applying portion 400 is driven by the movement of the handle connecting portion 300. The injection portion 500 is arranged on the pressure-applying side of the pressure-applying portion 400, and the injection portion 500 is used to accommodate a hemostatic agent. The liquid outlet 121 of the injection portion 500 is connected to the injection pipe 120. The handle connecting portion 300 is connected to the handle 11 of the biopsy needle 10 to drive the biopsy piece to be pushed and pulled, so that the coaxial puncture cannula device has a pushed-in state ( Figure 3 (d)) and unplugged state ( Figure 3 (e) in the middle. Figure 3 As shown in Figure (d), when in the pushed-in state, the handle connecting portion 300 pushes the biopsy needle 10 into the puncture channel 110, and the pressure applying portion 400 is in a non-transmission state, so that the hemostatic agent in the injection portion 500 is not pushed out. At this time, when the biopsy needle 10 passes through the puncture tube body 100 and is inserted into the patient's body, the pressure applying portion 400 does not apply pressure to the injection portion 500, so that the hemostatic agent will not be squeezed out. Figure 3As shown in Figure (e), when in the withdrawal state, the handle connecting portion 300 pulls the biopsy needle 10 out of the puncture channel 110 and drives the pressure-applying portion 400 to push out the hemostatic agent within the injection portion 500. At this point, since the biopsy needle 10 has completed sampling and is being withdrawn from the patient's body, the pressure-applying portion 400 is driven to squeeze the hemostatic agent within the injection portion 500, thereby simultaneously injecting the hemostatic agent into the sampling site as the biopsy needle 10 is withdrawn, providing immediate hemostasis. The puncture tube body 100 in this embodiment is a stainless steel tube with an axial length of approximately 18 cm and an outer diameter of approximately 3 mm. The injection conduit 120 can be provided externally of the puncture tube body 100 in the form of a side tube, such as a stainless steel tube with a length of approximately 8 cm and an inner diameter of approximately 1.5 mm. Alternatively, the injection conduit 120 can be formed internally by embedding it within the puncture tube body 100. This embodiment uses the injection conduit 120 provided within the wall as an example. The liquid injection part 500 can be in the form of a syringe with a capacity of about 3 ml, and the hemostatic agent is contained in the syringe; the liquid injection part 500 can also be in the form of a piston push bottle, and the hemostatic agent in the bottle can be squeezed out by pushing the piston. Such a piston push bottle is small in size and easy to use.

[0023] like Figure 2 、 Figure 3 、 Figure 4As shown, the coaxial puncture cannula device of this embodiment is configured by placing the puncture tube 100 in the patient's body, connecting the handle 11 of the biopsy needle 10 to the handle connector 300 of the coaxial puncture cannula device, and inserting the biopsy needle 10 into the puncture channel 110 of the puncture tube 100. The handle connector 300 is then pushed toward the patient, driving the biopsy needle 10 along the puncture channel 110 and into the patient's body. At this point, the coaxial puncture cannula device is in a pushed-in state. In this state, while the handle connector 300 pushes the biopsy needle 10, although the hand connector is connected to the pressure-applying portion 400, the pressure-applying portion 400 is in a non-actuating state and does not push the hemostatic agent within the injection portion 500. The biopsy needle 10 is activated to collect a sample and then closed after sampling is completed. The hemostatic agent is not pushed by the pressure-applying portion 400 before and during sampling. After the biopsy needle 10 has finished sampling, the doctor pushes the handle connector 300 away from the patient, pulling the biopsy needle 10 out along the puncture channel 110. At this point, the coaxial puncture cannula device is in a withdrawn state. In this state, the handle connector 300 drives the pressure-applying portion 400 toward the injection portion 500, squeezing the hemostatic agent within the injection portion 500, causing the hemostatic agent to flow into the patient's body through the injection channel 120, thereby achieving hemostasis. Therefore, during the withdrawal of the biopsy needle 10, the coaxial puncture cannula device can automatically inject the hemostatic agent, achieving timely hemostasis with the hemostatic agent, reducing the time required to achieve hemostasis and improving the hemostatic effect. Furthermore, during use, the doctor only needs to insert and remove the biopsy needle 10. After sampling is complete, the coaxial puncture cannula device can automatically inject the hemostatic agent, simplifying the post-biopsy hemostasis process and reducing the complexity of manual hemostasis, thereby improving the convenience and safety of the biopsy procedure.

[0024] like Figure 1 、 Figure 4 、 Figure 5 As shown, the pressure applying part 400 of this embodiment specifically includes: a driving member 410, a driving gear 420, a one-way bearing 430, a driven gear 440 and a pushing member 450. The driving member 410 is connected to the handle connecting part 300 and moves when driven by the handle connecting part 300. The driving gear 420 is meshed with the driving member 410, as shown in FIG. Figure 6 、 Figure 7 、 Figure 8As shown, the one-way bearing 430 has a first ring body 431 and a second ring body 432. The first ring body 431 rotates relative to the second ring body 432 when rotating forward and is fixed relative to the second ring body 432 when rotating reversely. The driving gear 420 is connected to the first ring body 431 of the one-way bearing 430, the driven gear 440 is connected to the second ring body 432 of the one-way bearing 430, and the pushing member 450 is engaged with the driven gear 440; in the specific structure, the guide through hole 210 and the guide groove 220 (or two guide through holes 210) are arranged side by side on the puncture bracket 200, and the active member 410 includes an active slider 411 and an active rack 412. The active slider 411 passes through the guide through hole 210 and is connected to the handle connecting part 300 on the front of the puncture bracket 200, and the active rack 412 is connected to the active slider 411 and is located on the back of the puncture bracket 200 for axial sliding. The pushing member 450 is axially movable on one side of the back side of the puncture bracket 200. The pushing member 450 specifically includes a driven slider 451, a driven rack 452 and a pushing rod 453; the driven slider 451 is embedded in the guide groove 220 for sliding, the driven rack 452 is fixed on the driven slider 451, and the pushing member 450 is set on the driven slider 451. A fixed column 230 is provided on the back of the puncture bracket 200. The fixed column 230 is located between the active rack 412 and the driven rack 452. A sleeve 441 is coaxially fixed to the driven gear 440. The driven gear 440 and the sleeve 441 are both rotatably sleeved on the fixed column 230. The inner ring (second ring body 432) of the one-way bearing 430 is fixedly sleeved on the sleeve 441, and the outer ring (first ring body 431) of the one-way bearing 430 is fixedly connected to the active gear 420. In this way, when the active rack 412 moves toward the patient (inserted from the proximal end to the distal end), the first ring body 431 is driven to rotate forward, that is, in the pushed-in state, the handle connecting part 300 drives the active part 410 to drive the one-way bearing 430 to rotate forward, and at this time, the second ring body 432 will not be driven to rotate. In this way, the driven gear 440 is not driven, so that the rack does not move, and the push rod 453 does not move. When the active rack 412 moves away from the patient (pulled from the distal end to the proximal end), it drives the first ring 431 to reverse. That is, in the pulled-out state, the handle connecting portion 300 drives the active member 410 to drive the one-way bearing 430 to reverse. At this time, the reversal of the first ring 431 will drive the second ring 432 to rotate. The rotating second ring 432 drives the driven gear 440 to rotate, thereby driving the driven rack 452 to move, thereby moving the push rod 453 from the proximal end to the distal end, thereby squeezing the liquid injection part 500 at the distal end. The one-way bearing 430 is an existing bearing that can be purchased directly on the market. Its characteristic is that the outer ring can only rotate in one direction relative to the inner ring. The specific structure will not be described in detail.

[0025] like Figure 6 、 Figure 7 、 Figure 9 As shown, further, a return elastic member 460 is connected to the pushing member 450 of this embodiment, and the return elastic member 460 is used to apply an elastic force to the pushing member 450 away from the liquid injection part 500. In the specific structure, the return elastic member 460 adopts a pushing spring, one end of which is connected to the driven slider 451 of the pushing member 450. When the driven gear 440 drives the driven rack 452 to move from the proximal end toward the distal end (pulled-out state), the driven slider 451 moves from the proximal end toward the distal end in the guide groove 220 and compresses the pushing spring, causing the pushing spring to generate elastic force. After the biopsy needle 10 is pulled out, the handle connection part 300 is released to remove the biopsy needle 10, and then the return elastic member 460 applies elastic force to move the driven rack 452 from the distal end toward the proximal end, causing the pushing member 450 to return to its position. As shown Figure 7 、 Figure 9 As shown, in order to facilitate the installation of the return elastic member 460, a mounting groove 221 is opened on one side of the guide groove 220, and a mounting boss 454 is set on the side surface of the driven slider 451 facing the mounting groove 221. The mounting boss 454 slides in the mounting groove 221, and the return elastic member 460 is installed in the mounting groove 221, one end of which is installed on the mounting boss 454, and the other end is installed at the bottom of the mounting groove 221.

[0026] The return elastic member 460 also plays another role. For example, when the active rack 412 moves toward the patient (during the insertion process from the proximal end to the distal end), the entire one-way bearing 430 is driven by the active rack 412, and then the active gear 420 applies force to the entire one-way bearing 430. The one-way bearing 430 is rotated on the fixed column 230 through the driven gear 440. Even if the one-way bearing 430 has the property of unidirectional rotation, it is easy to drive the one-way bearing 430 and the driven gear 440. The return elastic member 460 is used to apply elastic force to the driven rack 452, which is equivalent to applying a certain locking force to the driven gear 440 through the driven rack 452. In this way, it can be ensured that when the active rack 412 moves toward the patient, the one-way rotation of the one-way bearing 430 drives the first ring body 431 to rotate stably in the forward direction, thereby ensuring that the second ring body 432 will not be driven to rotate in the process, so that the driven gear 440 will not be driven, and the rack will not move, and the push rod 453 will not move.

[0027] It should be noted that due to the unidirectional rotation effect of the one-way bearing 430, when the return elastic member 460 applies elastic force to move the driven rack 452 from the distal end toward the proximal end, so that the push member 450 returns to its position, the second ring body 432 rotates at this time, while the first ring body 431 does not rotate, so that the handle connecting part 300 can be kept at the proximal end, which is convenient for the next use and installation of the biopsy needle 10.

[0028] like Figure 3 、 Figure 6 、 Figure 9 As shown, further, the liquid injection part 500 of this embodiment specifically includes: a liquid storage tube 510 and a piston part 520. The distal end of the liquid storage tube 510 is connected to the liquid injection pipeline 120, and the piston part 520 is movably arranged in the liquid storage tube 510, and pushes out the hemostatic agent in the liquid storage tube 510 under the push of the pressure-applying part 400. The liquid injection part 500 can use an existing syringe, or a customized piston pusher bottle. When using a syringe, the puncture bracket 200, the active part 410 and the push part 450 can be designed to be appropriately longer, so that the biopsy needle 10 can be pulled out from the handle connecting part 300 after the biopsy needle 10 is completely pulled out. As shown Figure 11 As shown, when a piston push bottle with a smaller radial length is used, the puncture bracket 200, the active member 410 and the push member 450 can be designed to be shorter. In this way, the biopsy needle 10 can be pulled out from the handle connecting part 300 before it is completely pulled out. The structure of the partially pulled out handle connecting part 300 is different from that of the completely pulled out handle connecting part 300, which will be described in detail below.

[0029] like Figure 3 、 Figure 6 As shown, the handle connecting portion 300 of this embodiment specifically includes an adjustment plate 310, a fork 320, and a clamping plate 330. The adjustment plate 310 is axially movable and located at the proximal end of the puncture tube body 100. The fork 320 is located at the distal end of the adjustment plate 310, and the clamping plate 330 is located at the proximal end of the adjustment plate 310. The distance between the fork 320 and the clamping plate 330 is adjusted by the adjustment plate 310 to adapt to the length of the handle 11 of the biopsy needle 10. The use of an adjustable handle connecting portion 300 can adapt to the handles 11 of different models of biopsy needles 10, thereby enhancing practicality.

[0030] It should be noted that Figure 3 The structure shown in FIG. 1 is to remove the biopsy needle 10 from the handle connecting portion 300 after the biopsy needle 10 is completely pulled out. Figure 11As shown, if the puncture bracket 200, the active part 410 and the pushing part 450 need to be shorter, the splint 330 of the handle connecting part 300 can be separated from the handle 11 of the biopsy needle 10 when the biopsy needle 10 is pulled out half or a quarter, etc., but not completely pulled out, and then the biopsy needle 10 can be pulled out. In the process that the splint 330 is not separated from the handle 11 of the biopsy needle 10, the handle connecting part 300 drives the pressure applying part 400 to transmit, and the hemostatic agent in the injection part 500 is completely pushed out to complete the injection of the hemostatic agent. After the splint 330 is separated from the handle 11 of the biopsy needle 10, the biopsy needle 10 no longer drives the handle connecting part 300 during the process of pulling out the biopsy needle 10, and the pushing part 450 is returned to its original position under the drive of the return elastic part 460. In this way, the moving distance of the pushing part 450 can be shortened, and the length of the puncture bracket 200 can be shortened accordingly. In order to facilitate the separation of the splint 330 of the handle connecting portion 300 from the handle 11 of the biopsy needle 10 when the biopsy needle 10 is not completely pulled out, the splint 330 is set to a "7" shape, and its distal end is hinged to the adjustment plate 310 through a hinge 331, so that the splint 330 can be separated from the handle 11 of the biopsy needle 10 by simply flipping the splint 330.

[0031] like Figure 1 、 Figure 6 、 Figure 9 As shown, the puncture tube body 100 of this embodiment is further connected to a docking joint 240 and a retaining portion 250. The docking joint 240 is connected to the injection pipe 120, and the injection part 500 is detachably connected to the retaining portion 250 and is also detachably connected to the docking joint 240. The use of the docking joint 240 and retaining portion 250 facilitates the detachable installation of the injection part 500, making it more convenient to use.

[0032] like Figure 1 、 Figure 10 As shown, further, the injection channel 120 of this embodiment extends to the distal end of the puncture tube body 100 and communicates with the puncture channel 110. A one-way blocking member 130 is provided at the liquid outlet 121 at the distal end of the injection channel 120. The one-way blocking member 130 is used to allow water to flow in a single direction into the puncture channel 110. When the injection channel 120 utilizes a separate side tube, the side tube can be inserted through the puncture tube body 100, with the liquid outlet 121 of the side tube located within the puncture channel 110. When the injection channel 120 is built into the puncture tube body 100, the liquid outlet 121 of the injection channel 120 is located on the inner wall of the puncture channel 110. Furthermore, the provision of the one-way blocking member 130 prevents blood leakage during sampling with the biopsy needle 10.

[0033] like Figure 10As shown, further, the one-way blocking member 130 of this embodiment specifically includes: a blocking block 131, which is movably arranged at the liquid outlet 121, and a blocking elastic member 132, one end of which is connected to the puncture tube body 100 and the other end is connected to the blocking block 131. The blocking block 131 blocks the liquid outlet 121 through the elastic force exerted by the blocking elastic member 132. The blocking block 131 cooperates with the blocking elastic member 132 to achieve one-way blocking similar to the principle of a one-way valve. In addition, a safety block 133 is provided. The safety block 133 is arranged on the side of the blocking block 131 away from the liquid outlet 121 and extends into the puncture channel 110. The safety block 133 is pushed by the biopsy needle 10 in the puncture channel 110 to squeeze the blocking block 131 out of the liquid outlet 121. The safety block 133 has a certain degree of elasticity. When the biopsy needle 10 is still in the puncture channel 110, the outer wall of the biopsy needle 10 will squeeze the safety block 133, so that the liquid outlet 121 is blocked more tightly. When the biopsy needle 10 is pulled out, the safety block 133 is not under pressure. Then, when the sealing block 131 is pushed by the hemostatic agent in the injection pipe 120, the liquid outlet 121 can be opened normally, thereby releasing the hemostatic agent.

[0034] Example 2 like Figure 1 、 Figure 2 As shown, the present application also proposes a biopsy needle kit, which includes the coaxial puncture cannula device, the puncture needle 20 and the biopsy needle 10 as described above. Figure 2 As shown in Figure (b), the puncture needle 20 is used to penetrate the puncture channel 110 of the coaxial puncture cannula device to puncture the patient's skin and insert the puncture tube body 100 into the patient's body. Figure 2 As shown in Figure (c), after the puncture is completed, the puncture needle 20 is withdrawn to facilitate the insertion of the biopsy needle 10. The handle 11 of the biopsy needle 10 is connected to the handle connecting portion 300 of the coaxial puncture cannula device, and the biopsy needle 10 is passed through the puncture channel 110 in the puncture tube body 100 and enters the patient's body tissue for sampling.

[0035] Example 3 The present application also provides a method for using a coaxial puncture cannula device, which is applied to the coaxial puncture cannula device described above, wherein the method for using the coaxial puncture cannula device comprises the following steps: Step S100: inserting the puncture needle into the puncture tube body of the coaxial puncture cannula device to pierce the patient's skin and insert the puncture tube body into the patient's body.

[0036] Step S200: withdraw the puncture needle, leaving the puncture tube body on the patient's body.

[0037] Step S300: Connect the handle of the biopsy needle to the handle connecting portion of the coaxial puncture cannula device, and insert the biopsy needle into the puncture channel of the puncture tube body.

[0038] Step S400: Push the handle connection portion toward the patient to drive the biopsy needle along the puncture channel and insert it into the patient's body.

[0039] Step S500: Start the biopsy needle to collect samples, and close the biopsy needle after the sampling is completed.

[0040] Step S600: Push the handle connecting part away from the patient to drive the biopsy needle to be pulled out along the puncture channel. At the same time, the handle connecting part drives the pressure-applying part to move toward the injection part and squeeze the hemostatic agent in the injection part, so that the hemostatic agent flows into the patient's body through the injection pipe.

[0041] During the withdrawal process, the handle of the biopsy needle can be detached from the handle connecting portion after complete withdrawal. This results in a longer length of the puncture support, the active member of the pressure-applying portion, and the pusher. Therefore, the handle of the biopsy needle can be detached from the handle connecting portion before the needle is fully withdrawn, so that the pusher returns to its original position while the needle continues to be withdrawn. This does not affect the return of the pusher during the continued withdrawal process, allowing the structure to be designed to be very short, making it more convenient to use.

[0042] In summary, the present invention provides a coaxial puncture cannula device, a biopsy needle kit and a method of use. By arranging an injection pipe and an injection part on the coaxial cannula, and with the cooperation of the handle connecting part and the pressure applying part, automatic injection of hemostatic agent after biopsy is achieved, the hemostatic operation process is simpler, and the convenience of the biopsy operation is greatly improved; the automatic injection of hemostatic agent can directly act on the inside of the puncture cavity, effectively stop bleeding in the internal organs, improve the hemostatic effect, and shorten the patient's postoperative recovery time; avoid the operation of manual pressing to stop bleeding, reduce the patient's pain, and improve the safety of the biopsy operation.

[0043] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A coaxial puncture cannula device for connecting a biopsy needle, characterized in that: The coaxial puncture cannula device comprises: a puncture tube body, the puncture tube body having a puncture channel extending axially therethrough, and a liquid injection channel provided on the puncture tube body, the puncture tube body being used to be inserted into the patient's body; A handle connecting portion, the handle connecting portion being arranged on the puncture tube body; a pressure-applying portion connected to the handle connecting portion; a liquid injection portion, the liquid injection portion being arranged on the pressure-applying side of the pressure-applying portion, the liquid injection portion being used to accommodate a hemostatic agent, and the liquid outlet of the liquid injection portion being connected to the liquid injection pipe; The handle connecting portion is used to connect to the handle of the biopsy needle, and has a pushed-in state and a pulled-out state by pushing and pulling the biopsy needle; In the pushing state, the handle connecting portion pushes the biopsy needle into the puncture channel and puts the pressure applying portion into a non-transmission state, without pushing out the hemostatic agent in the injection portion; In the pulled-out state, the handle connecting portion pulls the biopsy needle out of the puncture channel and drives the pressure applying portion to transmit, thereby pushing out the hemostatic agent in the liquid injection portion.

2. The coaxial puncture cannula device according to claim 1, characterized in that: The pressure applying portion includes: an active member connected to the handle connecting portion and moved by the drive of the handle connecting portion; A driving gear meshing with the driving member; a one-way bearing, the one-way bearing comprising a first ring body and a second ring body, the first ring body rotating relative to the second ring body during forward rotation and being fixed relative to the second ring body during reverse rotation, the driving gear being connected to the first ring body of the one-way bearing; A driven gear connected to the second ring of the one-way bearing; a pushing member, the pushing member being engaged with the driven gear; In the pushed-in state, the handle connecting portion drives the active member to drive the one-way bearing to rotate forward; in the pulled-out state, the handle connecting portion drives the active member to drive the one-way bearing to rotate reversely.

3. The coaxial puncture cannula device according to claim 2, characterized in that: The pushing member is connected to a return elastic member, and the return elastic member is used to apply an elastic force to the pushing member away from the liquid injection portion.

4. The coaxial puncture cannula device according to claim 2, characterized in that: The coaxial puncture cannula device further comprises: a puncture bracket, the puncture tube body is arranged at the distal end of the puncture bracket, and the handle connecting portion is movably arranged on the puncture bracket along the axial direction; The one-way bearing is rotatably arranged on the puncture bracket, the active member is movably arranged on the puncture bracket along the axial direction, and the pushing member is movably arranged on the puncture bracket along the axial direction.

5. The coaxial puncture cannula device according to claim 1, characterized in that: The liquid injection part includes: a liquid storage tube, the distal end of which is connected to the liquid injection pipeline; The piston part is movably arranged in the liquid storage tube and pushes the hemostatic agent in the liquid storage tube out under the push of the pressure-applying part.

6. The coaxial puncture cannula device according to claim 5, characterized in that: The puncture tube body is connected with a butt joint, and the butt joint is connected to the injection pipe; The clamping part is detachably connected to the liquid injection part and is detachably connected to the docking head.

7. The coaxial puncture cannula device according to claim 1, characterized in that: The injection pipe extends to the distal end of the puncture tube body and is connected to the puncture channel; A one-way blocking piece is provided at the liquid outlet at the distal end of the liquid injection pipe, and the one-way blocking piece is used to discharge water in one direction toward the puncture channel; The one-way blocking member includes: a blocking block, which is movably arranged at the liquid outlet; a blocking elastic member, one end of which is connected to the puncture tube body, and the other end of which is connected to the blocking block, wherein the blocking block blocks the liquid outlet through the elastic force exerted by the blocking elastic member; and a safety block, which is arranged on a side of the blocking block away from the liquid outlet and extends into the puncture channel; The safety block pushes the blocking block to squeeze the liquid outlet through the squeezing of the biopsy needle in the puncture channel.

8. The coaxial puncture cannula device according to claim 7, characterized in that: The handle connecting portion includes: an adjusting plate, which is movably arranged along the axial direction and is located at the proximal end of the puncture tube body; A clamping fork, the clamping fork being arranged at the distal end of the adjusting plate; a splint, the splint being arranged at the proximal end of the adjusting plate; The distance between the clamping fork and the clamping plate is adjusted by the adjusting plate to adapt to the handle length of the biopsy needle.

9. A biopsy needle kit, characterized in that: Comprising the coaxial puncture cannula device, puncture needle and biopsy needle according to any one of claims 1 to 8; The puncture needle is used to be inserted into the puncture channel of the coaxial puncture cannula device to puncture the patient's skin and insert the puncture tube body into the patient's body; The handle of the biopsy needle is connected to the handle connecting portion of the coaxial puncture cannula device, and the biopsy needle is passed through the puncture channel in the puncture tube body to enter the patient's body tissue for sampling.

10. A method for using a coaxial puncture cannula device, applied to the coaxial puncture cannula device according to any one of claims 1 to 8, characterized in that: The method of use comprises the steps of: Inserting the puncture needle into the puncture tube body of the coaxial puncture cannula device to pierce the patient's skin and insert the puncture tube body into the patient's body; Pull out the puncture needle, leaving the puncture tube body on the patient's body; Connecting the handle of the biopsy needle to the handle connecting portion of the coaxial puncture cannula device, and inserting the biopsy needle into the puncture channel of the puncture tube body; Pushing the handle connection portion toward the patient to drive the biopsy needle along the puncture channel and insert it into the patient's body; Starting the biopsy needle to collect samples and closing the biopsy needle after the sampling is completed; The handle connecting part is pushed away from the patient, driving the biopsy needle to be pulled out along the puncture channel. At the same time, the handle connecting part drives the pressure-applying part to move toward the injection part and squeezes the hemostatic agent in the injection part, so that the hemostatic agent flows into the patient's body through the injection pipe.

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