Coaxial needle

Abstract

The utility model relates to the technical field of medical equipment, in particular to a coaxial needle, which comprises a handle, an outer needle tube and an inner needle, the handle is divided into an outer needle tube handle and an inner needle handle, the outer needle tube is arranged on the outer needle tube handle, the inner needle is arranged on the inner needle handle, a circular groove is arranged in the outer needle tube handle, and the inner needle is arranged in the circular groove. A sealing gasket is installed in the circular groove and used for preventing air from flowing to the outer needle tube when the inner needle is repeatedly inserted into or taken out of the outer needle tube.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a coaxial needle. Background Technology

[0002] Biopsy, also known as surgical pathology or external examination, is a technique that involves removing diseased tissue from a patient's body through cutting, forceps, or puncture for pathological examination when necessary for diagnosis or treatment. It is the most important part of diagnostic pathology, providing a definitive histopathological diagnosis for the vast majority of submitted cases and serving as the final clinical diagnosis.

[0003] Currently, the mainstream biopsy needles in clinical practice are side-groove type fully automatic and semi-automatic biopsy needles, which can quickly cut and collect samples, but the sample size is small each time. To meet the biopsy needs, multiple sampling may be required, leading to repeated punctures and causing harm to the patient. Therefore, many current puncture procedures first use a coaxial needle to puncture the lesion site, establishing a puncture channel. The biopsy needle is then inserted into the lesion site through the coaxial needle channel to collect samples, avoiding the problem of multiple punctures. However, because this method relies on the coaxial needle to create a channel, the coaxial needle channel is connected to the outside air during the intervals between multiple biopsy samplings. This allows air to enter the lesion site, affecting medical imaging observation and hindering the biopsy procedure.

[0004] Therefore, the present invention provides a coaxial needle to solve the above problems. Utility Model Content

[0005] The technical problem this invention aims to solve is as follows: Currently, many biopsies involve first inserting a coaxial needle to the lesion site to establish a puncture channel. The biopsy needle is then inserted through this channel to collect a sample, avoiding the need for multiple punctures. However, because this method utilizes the coaxial needle to create a channel, the channel becomes connected to the outside air during the intervals between multiple biopsies. This allows air to enter the lesion site, affecting medical imaging and hindering the biopsy procedure.

[0006] This utility model provides the following technical solution: a coaxial needle, including a handle, an outer needle tube, and an inner needle. The handle is divided into an outer needle tube handle and an inner needle handle. An outer needle tube is installed on the outer needle tube handle, and an inner needle is installed on the inner needle handle. A circular groove is provided inside the outer needle tube handle, and a sealing gasket is installed in the circular groove. The sealing gasket is used to prevent air from flowing into the outer needle tube when the inner needle is repeatedly inserted or removed from the outer needle tube.

[0007] Preferably, the sealing gasket is made of silicone.

[0008] The beneficial effects of this utility model are as follows:

[0009] 1. This utility model sets a sealing gasket at the outer needle tube. The silicone sealing gasket achieves a good seal and can also deform when the inner needle is inserted or withdrawn. This ensures both a tight seal and smooth insertion or withdrawal of the inner needle, thus preventing air from entering the lesion site and affecting medical observation. Attached Figure Description

[0010] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of the overall design of this utility model;

[0012] Figure 2 This is a cross-sectional schematic diagram of the present invention;

[0013] Figure 3 This is a schematic diagram of the process of removing the outer needle from the inner needle according to this utility model.

[0014] In the diagram: 1. Handle; 11. Outer needle tube handle; 12. Inner needle handle; 2. Outer needle tube; 3. Inner needle; 4. Sealing gasket. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely represents some embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0016] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0017] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and "back side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is conventionally placed during use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model.

[0018] It should also be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] This disclosure aims to address the problem that many existing biopsies involve first inserting a coaxial needle to the lesion site to establish a puncture channel, then inserting a biopsy needle through this channel to collect a sample, thus avoiding multiple punctures. However, this method, due to the coaxial needle channel, allows air to enter the lesion site during the intervals between multiple biopsies, affecting medical imaging and hindering the biopsy procedure. Therefore, this disclosure proposes a coaxial needle with a sealing gasket at the outer needle tube. This silicone sealing gasket achieves a good seal while also deforming during the insertion or withdrawal of the inner needle, thus ensuring a smooth insertion or withdrawal of the inner needle and preventing air from entering the lesion site and affecting medical observation.

[0020] Specific Implementation Example 1: As shown in the example Figures 1 to 3 As shown, a coaxial needle includes a handle 1, an outer needle tube 2, and an inner needle 3. The handle 1 is divided into an outer needle tube handle 11 and an inner needle handle 12. The outer needle tube 2 is installed on the outer needle tube handle 11, and the inner needle 3 is installed on the inner needle handle 12. A circular groove is formed in the outer needle tube handle 11, and a sealing gasket 4 is installed in the circular groove. The sealing gasket 4 is used to prevent air from flowing into the outer needle tube 2 when the inner needle 3 is repeatedly inserted or removed from the outer needle tube 2.

[0021] like Figures 1 to 3As shown, the sealing gasket 4 is made of silicone. The silicone sealing gasket 4 can achieve a good seal while also deforming when the inner needle 3 is inserted or withdrawn, thus achieving a seal while ensuring smooth insertion or withdrawal of the inner needle 3.

[0022] The overall working process is as follows: After puncturing to the lesion site in the initial state, the temporary fixation between the inner needle handle 12 and the outer needle tube handle 11 is released, and the inner needle 3 is taken out from the outer needle tube 2. A puncture channel is established through the outer needle tube 2 channel, and multiple punctures are completed in conjunction with the biopsy needle. In order to solve the problem of air entering the lesion site due to the communication between the outer needle tube 2 channel and the outside air, a sealing gasket 4 is set inside the outer needle tube handle 11. The sealing gasket 4 is preferably a silicone gasket. During use, the silicone gasket does not affect the puncture of the inner needle 3 and the biopsy needle. At the same time, due to the large elastic compression sealing performance of the silicone gasket, it can effectively prevent air from entering the lesion site through the outer needle tube 2.

[0023] Specific Embodiment Two: Based on the above embodiment, the following improvements can be made: the sealing gasket 4 is multiple and arranged in a ring array. Arranging the sealing gasket 4 in a ring array is to further facilitate the insertion of the inner needle 3 into the outer needle tube 2 while ensuring the service life of the sealing gasket 4. If the sealing gasket 4 is an integral sealing gasket 4, it is necessary to ensure that the sealing gasket 4 is in close contact with the inner needle 3 to prevent air from entering. Using this method, the hole in the sealing gasket 4 will deform during repeated insertion or removal, thereby reducing the sealing performance of the sealing gasket 4. Therefore, setting multiple sealing gaskets can effectively avoid the above problems.

[0024] One side of the sealing gasket 4 is made of hard silicone, and the other side is made of soft silicone. The hard silicone side of the sealing gasket 4 is used to fix the sealing gasket 4 and prevent the sealing gasket 4 from deforming when the inner needle 3 is inserted downward or pulled outward. The soft silicone side of the sealing gasket 4 can deform when the inner needle 3 is inserted downward or pulled outward, which makes it easier to insert and remove the inner needle 3 while ensuring the sealing performance. The sealing gasket 4 is provided with an extended sealing part, which is located above the adjacent sealing gasket 4. The extended sealing part is used to further cover the deformed sealing gasket 4 when it deforms, thereby ensuring the sealing performance of the sealing gasket 4.

[0025] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A coaxial needle, comprising a handle (1), an outer needle tube (2), and an inner needle (3), wherein the handle (1) is divided into an outer needle tube handle (11) and an inner needle handle (12), the outer needle tube (2) is mounted on the outer needle tube handle (11), and the inner needle (3) is mounted on the inner needle handle (12), characterized in that, The outer needle tube handle (11) has a circular groove, and a sealing gasket (4) is installed in the circular groove. The sealing gasket (4) is used to prevent air from flowing into the outer needle tube (2) when the inner needle (3) is repeatedly inserted or removed from the outer needle tube (2). The sealing gasket (4) is made of silicone. There are multiple sealing gaskets (4) in a ring array. One side of the sealing gasket (4) is made of hard silicone, and the other side is made of soft silicone. An extended sealing part is provided on the sealing gasket (4).

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