Needle for endoscope

Abstract

The needle comprises a puncture front end part, a conveying part and an operation part, and the puncture front end part comprises a needle head, a conductive coil and a front end seat; the needle is used for puncturing tissues; the conductive coil is wound on the periphery of the needle and provides a magnetic field for the needle; the front end seat is provided with a central hole and a group of side holes formed along the edge of the central hole, the rear end of the needle head can penetrate through the central hole, and the two ends of the conductive coil can penetrate through the side holes; the conveying part comprises an outer sheath tube, an inner tube and a group of conductive wires; the front end of the outer sheath tube is connected with the rear end of the front end seat, the outer sheath tube is provided with a central channel, the central channel is communicated with the central hole, and the tube inner wall of the central channel is provided with a group of conductive wire channels in an extending manner along the axial direction; the inner tube is provided with an inner tube inner cavity, the front end of the inner tube inner cavity is communicated with the rear end of the needle head, and the inner tube is slidably arranged in the central channel of the outer sheath tube; the front ends of the conductive wires are connected with the two ends of the conductive coil respectively, and the rear ends of the conductive wires can penetrate through the conductive wire channels respectively.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an endoscopic needle. Background Art

[0002] Endoscopic ultrasound-guided aspiration is a technique for puncturing the gastrointestinal tract, bronchi, or surrounding tissues and organs under endoscopic ultrasound guidance to obtain cells or tissues for pathological examination or to introduce drugs or devices into the target organ or tissue for treatment. Specifically, it includes endoscopic ultrasound-guided needle aspiration cytology and endoscopic ultrasound-guided treatment techniques. During endoscopic interventional resection of tumor lesions in the digestive tract wall, a water pad is injected under the endoscope to lift the tumor lesion and prevent damage or even perforation of the digestive tract wall during resection.

[0003] The above-mentioned diagnosis and treatment processes all require the use of a puncture needle. For example, when using an existing ultrasonic endoscope puncture needle to puncture and sample human tumor tissue, the sampled tumor tissue is collected through the inner cavity of the puncture needle channel and removed from the human body. In order to ensure the positive rate of sampling, the tumor tissue needs to be sampled multiple times at different locations, so the same puncture needle needs to be used repeatedly. However, repeated puncture of human tissue with the same puncture needle will pose a risk of tumor tissue cells being implanted and spread. Using an existing submucosal injection needle to inject a water pad submucosally along the periphery of the lesion on the wall of the digestive tract also involves the same injection needle repeatedly piercing the mucosa.

[0004] Common endoscopic needles, such as EUS puncture needles and mucosal injection needles, have similar structures. However, due to their tiny bores, with inner diameters ranging from approximately 0.6mm to 4mm, cleaning them is difficult, and tumor cells or mucosal tissue inevitably remain within the bores. Replacing the needle with a new one for a second puncture and insertion can prevent implantation, but it also increases the patient's medical costs. Summary of the Invention

[0005] The present invention provides an endoscopic needle, which can inactivate residual fresh tissue in the needle channel, thereby reducing the risk of tissue transplantation and spread due to multiple punctures.

[0006] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0007] An endoscopic needle, characterized in that it includes a puncture front end, a conveying part and an operating part, wherein: the puncture front end includes a needle, a conductive coil and a front end seat; the needle is used to puncture tissue; the conductive coil is wound around the periphery of the needle and provides it with a magnetic field; the front end seat is provided with a central hole and a group of side holes opened along the edge of the central hole, the central hole can be used for the rear end of the needle to pass through, and the side holes can be used for the two ends of the conductive coil to pass through; the conveying part includes an outer sheath tube, an inner tube and a group of conductive wires; the front end of the outer sheath tube is connected to the rear end of the front end seat, the outer sheath tube is provided with a central channel, the central channel is connected to the central hole, and the inner wall of the central channel is provided with a group of conductive wire channels along its axial extension; the inner tube is provided with an inner tube lumen, the front end of the inner tube lumen is connected to the rear end of the needle, and the inner tube can slide It is placed in the central channel of the outer sheath; the front end of the conductive wire is respectively connected to the two ends of the conductive coil, and the rear end of the conductive wire can pass through the conductive wire channel respectively; the operating part includes a base and a push-pull handle; the base is formed with a base inner cavity, and the front end of the base inner cavity is connected to the outer sheath; an electrical port is provided on one side of the base, and two electrodes are placed in the electrical port, one end of the two electrodes can be connected to an external alternating power supply, and the other end of the two electrodes can be respectively connected to the rear end of the conductive wire; the push-pull handle is formed with a handle inner cavity, and the inner tube passes through the base inner cavity and is connected to the front end of the handle inner cavity, and the rear end of the handle inner cavity can be connected to an external instrument. The front end of the push-pull handle can be slidably placed on the rear end of the base inner cavity, and the forward and backward movement of the push-pull handle can drive the inner tube to slide along the central channel to extend or retract the needle.

[0008] Preferably, the conductive coil is formed by spirally winding a metal cable, the turns of the conductive coil are concentrically arranged, and the outer circumference of one of the two ends of the conductive coil is bent until it is flush with the other end.

[0009] Preferably, the conductive coil is made of copper material.

[0010] Preferably, the needle includes a needle tube and a connecting gasket, the front end of the needle tube is an oblique cut, the rear end of the needle tube is placed in the inner cavity of the connecting gasket, and the other end of the connecting gasket is placed in the inner cavity of the inner tube of the conveying part.

[0011] Preferably, the joint between the needle tube and the inner cavity of the connecting gasket or the joint between the connecting gasket and the inner cavity of the inner tube is sealed with an adhesive.

[0012] Preferably, the needle tube is made of stainless steel, and the connecting washer is made of refractory fiber material.

[0013] Preferably, the front end of the base is a tapered tube, and the electrical appliance port is vertically arranged on one side of the base.

[0014] Preferably, the push-pull handle includes a transfer tube, a gripping portion and a mounting port, the transfer tube is communicated with the inner tube, the gripping portion is used to grip the push-pull handle, and the mounting port is used to mount an external device.

[0015] Preferably, the external instrument is a syringe or a sample pipette.

[0016] Preferably, the front end seat is made of ceramic material.

[0017] Preferably, the two electrodes are respectively a ring and a needle core.

[0018] The endoscopic needle provided in an embodiment of the present invention innovatively combines the needle head with a conductive coil so that the tissue inside the needle head can be inactivated by the magnetic field formed by the conductive coil, thereby reducing the risk of residual tissue being transplanted due to repeated punctures. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 1 is a diagram showing the overall structure of an endoscopic needle in an embodiment of the present invention.

[0021] Figure 2 It is an overall cross-sectional view and a schematic diagram of the layout of the endoscopic needle in an embodiment of the present invention. The overall cross-sectional view is a schematic diagram along the axial direction of the outer sheath tube, and the local enlarged view is a schematic diagram along the radial direction of the outer sheath tube.

[0022] Figure 3 Schematic diagram of the induction heating coil system in an embodiment of the present invention.

[0023] Figure 4 Schematic diagram of the induction coil heating principle in an embodiment of the present invention. DETAILED DESCRIPTION

[0024] The technical solution of the present invention will be further described in detail below through examples and in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the overall inventive concept of the present invention and should not be construed as limiting the present invention.

[0025] In addition, in the following detailed description, for ease of explanation, numerous specific details are set forth to provide a comprehensive understanding of the disclosed embodiments. However, it is apparent that one or more embodiments can be practiced without these specific details. In other cases, well-known structures and devices are shown in diagrammatic form to simplify the accompanying drawings.

[0026] It should be noted that the word "comprising" does not exclude other elements or steps, and the word "one" or "an" does not exclude a plurality; the directions or positional relationships indicated by "one end", "the other end", "inside", "outside", "front", "back", "distal side", "proximal side", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. "First" and "second" are used to distinguish the names of different components and are not for the purpose of ranking or indicating importance or primary and secondary distinctions. In addition, any element number in the claims should not be understood as limiting the scope of the present disclosure.

[0027] The inventors discovered that the risk of tissue transplantation from repeated acupuncture can be significantly reduced by heating and inactivating the needle after acupuncture. Therefore, the inventors innovatively placed a conductive coil at the puncture tip of the needle, using electromagnetic induction to heat the conductor (typically metal) and inactivate the tissue.

[0028] According to an overall technical concept of the present invention, an endoscopic needle includes a puncture front end, a conveying part and an operating part, wherein: the puncture front end includes a needle, a conductive coil and a front end seat; the needle is used to puncture tissue; the conductive coil is wound around the periphery of the needle and provides it with a magnetic field; the front end seat is provided with a central hole and a group of side holes opened along the edge of the central hole, the central hole can be used for the rear end of the needle to pass through, and the side holes can be used for the two ends of the conductive coil to pass through; the conveying part includes an outer sheath tube, an inner tube and a group of conductive wires; the front end of the outer sheath tube is connected to the rear end of the front end seat, the outer sheath tube is provided with a central channel, the central channel is connected to the central hole, and the inner wall of the central channel is provided with a group of conductive wire channels along its axial extension; the inner tube is provided with an inner tube lumen, the front end of the inner tube lumen is connected to the rear end of the needle, and the inner tube is provided with a conductive wire channel. The tube can be slidably placed in the central channel of the outer sheath tube; the front end of the conductive wire is respectively connected to the two ends of the conductive coil, and the rear end of the conductive wire can respectively pass through the conductive wire channel; the operating part includes a base and a push-pull handle; the base is formed with a base inner cavity, and the front end of the base inner cavity is connected to the outer sheath tube; an electrical port is provided on one side of the base, and two electrodes are placed in the electrical port, one end of the two electrodes can be connected to an external alternating power supply, and the other end of the two electrodes can be respectively connected to the rear end of the conductive wire; the push-pull handle is formed with a handle inner cavity, and the inner tube passes through the base inner cavity and is connected to the front end of the handle inner cavity, and the rear end of the handle inner cavity can be connected to an external instrument. The front end of the push-pull handle can be slidably placed on the rear end of the base inner cavity, and the forward and backward movement of the push-pull handle can drive the inner tube to slide along the central channel to extend or retract the needle.

[0029] In the embodiment of the present invention, “front end” refers to a direction close to a target operating position, and “rear end” refers to a direction close to an operator.

[0030] like Figures 1 to 4As shown, in an embodiment of the present invention, an endoscopic needle 100 includes a puncture tip portion 110 , a delivery portion 120 and an operating portion 130 .

[0031] The puncture tip 110 comprises a needle 111, a conductive coil 112, and a front end seat 113. Needle 111 is used to puncture tissue for sampling or injection. In some preferred embodiments, needle 111 comprises a needle tube 1111 and a connecting washer 1112. The front end of needle tube 1111 is beveled to facilitate tissue puncture. The rear end of needle tube 1111 is positioned within the lumen of connecting washer 1112, while the other end of connecting washer 1112 is positioned within the lumen of inner tube 122 of delivery section 120.

[0032] In some more preferred embodiments, the joint between the needle tube 1111 and the inner cavity of the connecting gasket 1112 or the inner cavity of the connecting gasket 1112 and the inner cavity of the inner tube 122 is sealed with an adhesive.

[0033] In some preferred embodiments, needle tube 1111 is made of stainless steel, and connecting washer 1112 is made of a refractory fiber material. The stainless steel needle tube 1111 acts as a conductor, and the magnetic field directly penetrates the stainless steel needle tube placed in the coil. The electrons within the metal are very active, and the collision and friction between them can generate heat energy. The refractory fiber material used in connecting washer 1112 has high temperature resistance and thermal insulation properties. The refractory fiber connecting washer 1112 is used to isolate the heat generated by the stainless steel needle tube, preventing the heat from being directly transferred to the inner tube 122 of the delivery unit 120.

[0034] The conductive coil 112 is wound around the needle 111 and provides a magnetic field therefor. In some preferred embodiments, the conductive coil 112 is formed by spirally winding a metal cable, with the turns of the conductive coil 112 arranged concentrically. The outer periphery of one end of the conductive coil 112 is bent until it is flush with the other end. The flat ends of the conductive coil 112 facilitate connection to a set of parallel conductive wires 123. The conductive coil 112 can create a magnetic field to transmit electrical energy from an external alternating current power source to the needle 111 surrounded by the conductive coil 112.

[0035] In some more preferred embodiments, the conductive coil 112 is made of copper material, which has the characteristics of high conductivity and high temperature resistance.

[0036] The front end seat 113 is provided with a central hole 1131 and a group of side holes 1132 opened along the edge of the central hole 1131. The central hole 1131 can allow the rear end of the needle 111 (the needle tube 1111 or the connecting gasket 1112) to pass through, and the side holes 1132 can allow the two ends of the conductive coil 112 to pass through. For example, the two ends of the conductive coil 112 that are parallel to each other can pass through the side holes 1132 respectively. In some preferred embodiments, the front end seat 113 is made of ceramic material. Ceramic material has the characteristics of insulation and high temperature resistance. The ceramic front end seat can isolate current and heat to protect the outer sheath 121 of the conveying part 120.

[0037] The delivery portion 120 includes an outer sheath 121, an inner tube 122, and a group of conductive wires 123. The front end of the outer sheath 122 is connected to the rear end of the front seat 113, and the outer sheath 122 is provided with a central channel 1221. The central channel 1221 is connected to the central hole 1131 of the front seat 113, and the inner wall of the central channel 1121 is provided with a group of conductive wire channels 1232 extending along its axial direction. The conductive wire channels 1232 can be aligned with a group of side holes 1132 of the puncture front end portion 110 to communicate with each other. After connection, the conductive wire 123 can pass through the conductive wire channels 1232 to connect with the two ends of the conductive coil 112 to transmit electrical energy. The conductive wire channels 1232 are not connected to the central channel of the outer sheath 121.

[0038] The inner tube 122 is provided with an inner tube lumen, the front end of which is connected to and communicates with the rear end of the needle 111. The inner tube 122 is slidably disposed in the central channel 1221 of the outer sheath 121. The slidable structure allows the inner tube 122 to slide in the central channel 1221, driving the needle 111 connected to its front end to slide and extend or retract.

[0039] The front ends of the conductive wires 123 are connected to both ends of the conductive coil 112 , and the rear ends thereof pass through the conductive wire channels 1232 and extend to connect to the operating portion 110 . The conductive wires 123 can transmit electrical energy to the conductive coil 112 .

[0040] The operating unit 130 includes a base 131 and a push-pull handle 132. The base 131 defines an inner cavity 1311, the front end of which is connected to the outer sheath 121. An electrical port 1312 is provided on one side of the base 131. This port houses two electrodes 1313. One end of each electrode 1313 can be connected to an external AC power source to receive electrical energy, and the other end can be connected to the rear end of a conductive wire 123 to transmit the received electrical energy through the conductive wire 123.

[0041] The push-pull handle 132 defines a handle lumen 1321. The inner tube 122 passes through the base lumen 1311 and communicates with the front end of the handle lumen 1321. The rear end of the handle lumen 1321 can communicate with an external device, such as a syringe needle or a sampler. The front end of the push-pull handle 132 is slidably mounted on the rear end of the base lumen 1311. The forward and backward movement of the push-pull handle 132 causes the inner tube 122 to slide along the central channel 1121, thereby extending or retracting the needle 111.

[0042] In some preferred embodiments, the front end of the base 131 is a tapered tube, and the electrical port 1312 is vertically arranged on one side of the base 131 . Such a structural arrangement can avoid interference between the electrical port 1312 and the operating portion 130 .

[0043] In some preferred embodiments, the two electrodes 1313 are respectively formed of a ring and a needle core, which are used to stably connect to the power supply and isolate the interference of the positive and negative poles of the power supply, thereby having the characteristics of effective isolation and stable connection.

[0044] In some preferred embodiments, the push-pull handle 132 includes a transfer tube 1322, a gripping portion 1323 and an installation port 1324, wherein the transfer tube 1322 is connected to the inner tube 122, the gripping portion 1323 is used to hold the push-pull handle 132, and the installation port 1324 is used to install external equipment (not shown in the figure).

[0045] In an embodiment of the present invention, one end of the two electrodes (needle-ring electrodes) is connected to an external alternating power supply, and the power supply charge flows from the needle core or ring of the two electrodes through the conductive wire 123 and is transmitted to one end of the conductive coil 112 that is parallel to each other. After flowing through several turns of the conductive coil 112, it flows out from the other end of the conductive coil 112 and finally flows back to the needle core or ring of the electrode through the conductive wire.

[0046] The flow of electric charge through the conductive coil 112 can create a magnetic field. The generated circles of magnetic flux lines will directly penetrate the stainless steel metal needle tube (needle) placed in the coil. When the magnetic flux lines pass through the stainless steel metal, the electrons inside the metal will become very active, and they will collide and rub against each other to generate heat energy, achieving the effect of making the stainless steel metal itself heat up quickly. When the temperature reaches 45°C or above, the protein will denature and the biological cells will lose their activity, thereby inactivating the tumor or mucosal tissue remaining in the stainless steel metal needle tube (needle).

[0047] The following describes in detail the method for using the endoscopic needle according to the embodiment of the present invention.

[0048] The endoscopist inserts the endoscope into the human body. Guided by the endoscopic image, the endoscopic needle 100 according to an embodiment of the present invention enters the human body along the instrument channel of the endoscope until it is visible in the endoscopic image. The endoscopist manipulates the endoscopic needle 100 to perform the initial injection or aspiration step. The endoscopist maintains the base 131 of the operating unit 130 stationary and pushes the push-pull handle 132 forward. The inner tube 122 of the delivery unit 120 slides within the outer sheath 121, driving the needle 110 out of the conductive coil 112 at the front end. The endoscopist pushes the base 131 of the operating unit 130 forward, allowing the delivery unit 120 to slide within the instrument channel of the endoscope. The needle 110 of the endoscopic needle 100 penetrates the human tissue. The mounting port 1323 of the push-pull handle 132 is inserted into the syringe or sample aspirator as needed for injection or aspiration. The needle 110 is then withdrawn from the human tissue, and the subsequent injection or aspiration step is performed as appropriate.

[0049] Before performing the injection or aspiration step again, the endoscopist holds the base 131 of the operating unit 130 stationary and pulls back the push-pull handle 132, which slides through the inner tube 122 of the delivery unit 120 within the outer sheath 121 to drive the needle 110 back into the conductive coil 112 at the front end. The external AC power supply is connected to the electrical port 1312 of the base 131 of the operating unit 130 and the power is turned on, causing an electric charge to flow through the conductive coil 112. The conductive coil 112 creates a magnetic field surrounding the needle 111 housed within the conductive coil 112. Over a period of time, the needle 111 is heated to a certain temperature, inactivating any remaining human tissue in the needle 111. The power is then turned off to stop heating the needle 111, and the endoscopist operates the syringe to deliver sterile water to the needle outlet to cool the needle. After completing these steps, the endoscopist is ready to perform the injection or aspiration step again.

[0050] The endoscopic needle provided in an embodiment of the present invention innovatively combines the needle head with a conductive coil so that the tissue inside the needle head can be inactivated by the magnetic field formed by the conductive coil, thereby reducing the risk of residual tissue being transplanted due to repeated punctures.

[0051] Those skilled in the art will appreciate that the embodiments described above are exemplary and that they may be improved upon. The structures described in the various embodiments may be freely combined without causing any conflict in structure or principle.

[0052] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplify the preferred embodiments of the present invention and should not be construed as limiting the present invention.

[0053] Although some embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the scope of which is defined in the claims and their equivalents.

Claims

1. An endoscopic needle, characterized in that It includes a puncture front end, a delivery part and an operation part, wherein: The puncture front end portion includes a needle, a conductive coil and a front end seat; the needle is used to puncture tissue; the conductive coil is wound around the periphery of the needle and provides a magnetic field for it; the front end seat is provided with a central hole and a group of side holes opened along the edge of the central hole, the central hole is for the rear end of the needle to pass through, and the side holes are for the two ends of the conductive coil to pass through; The delivery portion includes an outer sheath tube, an inner tube and a group of conductive wires; the front end of the outer sheath tube is connected to the rear end of the front end seat, the outer sheath tube is provided with a central channel, the central channel is communicated with the central hole, and the inner wall of the central channel is provided with a group of conductive wire channels along its axial extension; the inner tube is provided with an inner tube lumen, the front end of the inner tube lumen is communicated with the rear end of the needle, and the inner tube can be slidably placed in the central channel of the outer sheath tube; the front ends of the conductive wires are respectively connected to the two ends of the conductive coil, and the rear ends of the conductive wires can respectively pass through the conductive wire channels; The operating part includes a base and a push-pull handle; the base is formed with a base inner cavity, and the front end of the base inner cavity is connected to the outer sheath tube; an electrical port is provided on one side of the base, and two electrodes are placed inside the electrical port, one end of the two electrodes can be connected to an external alternating power supply, and the other end of the two electrodes can be connected to the rear end of the conductive wire respectively; the push-pull handle is formed with a handle inner cavity, and the inner tube passes through the base inner cavity and is connected to the front end of the handle inner cavity, and the rear end of the handle inner cavity can be connected to an external instrument, and the front end of the push-pull handle can be slidably arranged on the rear end of the base inner cavity, and the forward and backward movement of the push-pull handle can drive the inner tube to slide along the central channel to extend or retract the needle.

2. The endoscopic needle according to claim 1, wherein: The conductive coil is formed by spirally winding a metal cable, the turns of the conductive coil are concentrically arranged, and the outer circumference of one of the two ends of the conductive coil is bent until it is flush with the other end.

3. The endoscopic needle according to claim 2, characterized in that: The conductive coil is made of copper material.

4. The endoscopic needle according to any one of claims 1 to 3, characterized in that: The needle includes a needle tube and a connecting gasket. The front end of the needle tube is an oblique cut, the rear end of the needle tube is placed in the inner cavity of the connecting gasket, and the other end of the connecting gasket is placed in the inner cavity of the inner tube of the conveying part.

5. The endoscopic needle according to claim 4, characterized in that: The joint between the needle tube and the inner cavity of the connecting gasket or the joint between the connecting gasket and the inner cavity of the inner tube is sealed with an adhesive.

6. The endoscopic needle according to claim 4 or 5, characterized in that: The needle tube is made of stainless steel, and the connecting washer is made of fire-resistant fiber material.

7. The endoscopic needle according to any one of claims 1 to 6, characterized in that: The front end of the base is a tapered tube, and the electrical appliance port is vertically arranged on one side of the base.

8. The endoscopic needle according to any one of claims 1 to 7, characterized in that: The push-pull handle includes a transfer tube, a gripping portion, and an installation port. The transfer tube is communicated with the inner tube. The gripping portion is used to grip the push-pull handle. The installation port is used to install the external instrument.

9. The endoscopic needle according to claim 9, characterized in that: The external instrument is a syringe or a sample aspirator.

10. The endoscopic needle according to any one of claims 1 to 9, characterized in that: The front end seat is made of ceramic material.

11. The endoscopic needle according to any one of claims 1 to 10, characterized in that: The two electrodes are respectively a ring and a needle core.

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