Puncture needle

Abstract

The utility model provides a puncture needle, relates to medical instrument technical field, including needle tube, needle seat and electrode plug, the needle seat is provided with the access port that the electrode plug installs, the electrode plug can be connected with the access port in clamping connection, when need electrical stimulation guide, the electrode plug is inserted into the access port and then is conductively connected with the needle tube, and the needle tube is connected with the needle seat. When the electrical stimulation guide is not needed, the electrode plug is pulled out of the access port. By arranging the access port and the electrode plug and connecting the access port and the electrode plug through the clamping structure, the detachable effect of the electrode plug is achieved, when electrical stimulation guiding is not needed, the electrode plug is pulled out of the access port, interference to operation of an operator is avoided, and the access port and the electrode plug are both designed to be circular, so that the electrode plug is convenient to use. The effect that the insertion direction is not limited can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a puncture needle. Background Art

[0002] Nerve block needles, anesthesia puncture needles, etc. are all medical devices that use electric current to stimulate muscle movement to locate the puncture position. Taking the nerve block needle as an example, the nerve block needle connects an adjustable small electric current to the puncture needle. When the puncture needle approaches the nerve, the electric current stimulates the nerve to generate muscle movement, and the nerve can be clearly located near the tip of the puncture needle without the puncture needle touching the nerve, so as to achieve the purpose of locating the nerve; the electrodes of traditional nerve block needles and anesthesia puncture needles are generally not detachable, which will interfere with the operator's operation when electric stimulation guidance is not required. In view of the above defects, this application is proposed. Content of the Utility Model

[0003] The purpose of the utility model is to provide a puncture needle, which has the advantages of detachable electrodes and convenient electrode installation.

[0004] To solve the above problems, the utility model provides a puncture needle, which includes a needle tube, a needle seat and an electrode plug. An access port for installing the electrode plug is provided on the needle seat, and the electrode plug can be connected to the access port in a snap-fit manner. When electric stimulation guidance is required, after the electrode plug is inserted into the access port, it is electrically connected to the needle tube. When electric stimulation guidance is not required, the electrode plug is pulled out from the access port.

[0005] According to an embodiment of the utility model, a convex portion is provided on the inner wall of the access port, and a matching portion is provided on the electrode plug. The snap-fit effect is achieved through the convex portion and the matching portion, and the matching portion is a convex structure or a concave structure.

[0006] According to an embodiment of the utility model, the matching portion is a convex structure, and a radially penetrating through groove is provided on the electrode plug.

[0007] According to an embodiment of the utility model, the access port is a hole with a circular cross-section, and the cross-section of the electrode plug is also circular, achieving the effect of unrestricted insertion direction.

[0008] According to an embodiment of the utility model, a metal joint and an electrode piece are connected in the needle seat. The metal joint is used for contact connection with the electrode plug, and the electrode piece is in contact connection with the needle tube.

[0009] According to an embodiment of the utility model, a connection hole for inserting the metal joint is provided in the electrode plug.

[0010] According to an embodiment of the utility model, the connection hole adopts a stepped hole structure to assist in positioning the insertion depth.

[0011] According to an embodiment of the present utility model, after the electrode plug is inserted into the insertion port, the electrode plug can clamp the metal joint.

[0012] According to an embodiment of the present utility model, the end of the insertion port is of a flared structure.

[0013] According to an embodiment of the present utility model, there is an angle less than 90° between the axis of the insertion port and the axis of the needle tube.

[0014] According to an embodiment of the present utility model, a Luer connector connection part is provided on the needle holder for installing a Luer connector.

[0015] The beneficial effect of the present utility model is that by providing an insertion port and an electrode plug, and using a clamping structure to realize the connection between the two, the electrode plug achieves a detachable effect. When electrical stimulation guidance is required, after the electrode plug is inserted into the insertion port, it is electrically connected to the needle tube. When electrical stimulation guidance is not needed, the electrode plug is pulled out from the insertion port to avoid interfering with the operator's operation. Moreover, both the insertion port and the electrode plug are circularly designed, achieving the effect of unrestricted insertion direction. A Luer connector can also be installed on the needle holder, making the product have better adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 It is a schematic diagram of the overall structure of a puncture needle;

[0018] Figure 2 It is a schematic cross-sectional structure diagram of the needle holder and the electrode plug;

[0019] Figure 3 It is a schematic diagram of the structure of the needle holder;

[0020] Figure 4 It is a schematic diagram of the structure of the electrode plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following description is only used to disclose the present utility model so that those skilled in the art can implement the present utility model. The embodiments described below are only examples, and those skilled in the art can think of other obvious deformations. The basic principles defined in the following description can be applied to other implementation schemes, deformation schemes, improvement schemes, equivalent schemes, and other schemes that do not depart from the spirit and scope of the present utility model.

[0022]

Embodiment 1

[0023] A puncture needle, such as Figure 1, including a needle tube 3, a needle base 1, and an electrode plug 2. The puncture needle in this solution can be used as a nerve block needle, an anesthesia puncture needle, etc., and can be adaptively improved according to specific usage requirements.

[0024] Such as Figures 1 - 3 , a connection port 11 for installing the electrode plug 2 is provided on the needle base 1. The electrode plug 2 can be snap-connected to the connection port 11, so as to realize the detachable setting of the electrode connector. When electrical stimulation guidance is required, after the electrode plug 2 is inserted into the connection port 11, it is electrically connected to the needle tube 3. When electrical stimulation guidance is not needed, the electrode plug 2 is pulled out from the connection port 11 to avoid interfering with the operator's operation.

[0025] Specifically, the snap-fit structure for the electrode plug 2 to be snap-connected to the connection port 11 includes a convex portion 12 provided on the inner wall of the connection port 11, and a mating portion 22 provided on the electrode plug 2. The snap-fit effect is achieved through the convex portion 12 and the mating portion 22. The mating portion 22 is a convex structure or a concave structure. In this embodiment, the mating portion 22 adopts a convex structure, such as Figure 4 , the mating portion 22 is provided at the end of the electrode plug 2. After insertion, the mating portion 22 is deformed by the extrusion of the convex portion 12. After passing through the position of the convex portion 12, the electrode plug 2 returns to its original shape to achieve the snap-fit effect; the snap-fit structure is not limited to the concave-convex fit structure disclosed in this solution. In other embodiments, snap-fit cooperation between the two can also be achieved by means such as spring ball beads.

[0026] Such as Figure 4 , in order to facilitate the deformation of the electrode plug 2, a radially penetrating through groove 23 is provided on the electrode plug 2.

[0027] In this embodiment, the connection port 11 adopts a hole with a circular cross-section, that is, a cylindrical hole, and the cross-section of the electrode plug 2 is also circular, that is, a cylindrical plug. The convex portion 12 and the mating portion 22 are both annularly arranged, achieving the effect of unrestricted insertion direction. It can be inserted arbitrarily at 360°, making the insertion operation simpler.

[0028] In other embodiments, the connection port 11 can also adopt forms such as a square hole, an oval hole, a tapered hole, etc., and the electrode plug 2 is adaptively changed.

[0029] Such as Figure 2 , a metal joint 13 and an electrode piece 14 are connected in the needle base 1. The metal joint 13 is used to contact and connect with the electrode plug 2, the electrode piece 14 is in contact connection with the needle tube 3, and the electrode plug 2 is connected to an electrode wire. When the electrode plug 2 is inserted and connected, current is transmitted to the needle tube through the metal joint 13 and the electrode piece 14.

[0030] Such as Figure 3, the metal joint 13 is a columnar structure and can be made of brass. A connection hole 24 for inserting the metal joint 13 is provided in the electrode plug 2. The electrode plug 2 can be wholly or partially made of a conductive material to conduct electricity when connected to the metal joint 13, or it can also conduct electricity by contacting the electrode wire after the metal joint 13 is inserted into the connection hole 24. The connection hole 24 is a through hole and can also be used for installing the electrode wire. Further, as Figure 2 , the connection hole 24 adopts a stepped hole structure for assisting in positioning the insertion depth.

[0031] Optionally, when the electrode plug 2 is inserted into the access port 11, under the extrusion of the convex portion 12, the electrode plug 2 can clamp the metal joint 13 to ensure the contact effect.

[0032] As Figure 3 , to further facilitate the insertion of the electrode plug 2, the end of the access port 11 is a flared structure.

[0033] To facilitate the operation of the puncture needle and the insertion of the electrode plug 2, as Figure 2 , the axis of the access port 11 extends upward and to the right and has an angle less than 90° with the axis of the needle tube 3.

[0034] Further, a Luer connector connection portion 15 is provided on the needle holder 1 for installing a Luer connector.

[0035] Those skilled in the art should understand that the above description and the embodiments of the present invention shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and described in the embodiments. Without departing from the said principle, the embodiments of the present invention can have any deformation and modification.

Claims

1. A puncture needle, characterized in that: The invention comprises a needle tube (3), a needle seat (1) and an electrode plug (2); the needle seat (1) is provided with an access port (11) for installing the electrode plug (2); the electrode plug (2) can be connected to the access port (11) by snapping; when electrical stimulation guidance is required, the electrode plug (2) is inserted into the access port (11) and is conductively connected to the needle tube (3); when electrical stimulation guidance is not required, the electrode plug (2) is pulled out of the access port (11).

2. The puncture needle according to claim 1, characterized in that: A protrusion (12) is provided in the inner wall of the access port (11), and a matching portion (22) is provided on the electrode plug (2). A snap-fitting effect is achieved by the protrusion (12) and the matching portion (22), and the matching portion (22) is a protruding structure or a recessed structure.

3. The puncture needle according to claim 2, characterized in that: The matching portion (22) is a protruding structure, and the electrode plug (2) is provided with a radially penetrating through groove (23).

4. The puncture needle according to any one of claims 1 to 3, characterized in that: The access port (11) is a hole with a circular cross section, and the electrode plug (2) is also circular in cross section, thereby achieving an effect of no restriction on the insertion direction.

5. The puncture needle according to claim 4, characterized in that: The needle seat (1) is provided with a metal joint (13) and an electrode sheet (14) connected to each other, the metal joint (13) being used for contacting and connecting with the electrode plug (2), and the electrode sheet (14) being used for contacting and connecting with the needle tube (3).

6. The puncture needle according to claim 5, characterized in that: The electrode plug (2) is provided with a connection hole (24) for inserting the metal connector (13).

7. The puncture needle according to claim 6, characterized in that: The connection hole (24) adopts a stepped hole structure to assist in positioning the insertion depth.

8. The puncture needle according to claim 6 or 7, characterized in that: After the electrode plug (2) is inserted into the access port (11), the electrode plug (2) can clamp the metal joint (13).

9. The puncture needle according to claim 4, characterized in that: There is an angle of less than 90° between the axis of the access port (11) and the axis of the needle tube (3).

10. The puncture needle according to claim 9, characterized in that: The needle seat (1) is provided with a Luer connector connecting portion (15) for installing a Luer connector.

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