An anesthetic puncture needle

Abstract

This utility model discloses an anesthesia puncture needle, including an outer needle tube and a needle hub connected to one end of the outer needle tube; it also includes an inner needle body nested inside the outer needle tube, with one end extending to the outside through the opening of the outer needle tube, and the other end extending into the needle hub. The protruding end of the inner needle body is conical, and at least one collection hole is opened on its outer wall near the end. This utility model relates to the field of medical anesthesia technology. This anesthesia puncture needle, through the cooperation of the inner needle body and the outer needle tube, can facilitate the puncture needle to enter the subarachnoid space. At the same time, it can pull the piston collector to draw cerebrospinal fluid from the end of the inner needle body and store it in the internal cavity of the piston collector, so that it can be mixed with the colorimetric solution injected through the colorimetric branch tube, thereby enabling colorimetric treatment of the cerebrospinal fluid, facilitating rapid diagnosis by medical personnel. In this process, the colorimetric solution will not come into contact with the human body, avoiding harm to the human body.

Description

Technical Field

[0001] This utility model relates to the field of medical anesthesia technology, specifically an anesthesia puncture needle. Background Technology

[0002] A spinal puncture needle is a medical device specifically used for subarachnoid anesthesia. Sometimes, before or during spinal anesthesia, a small amount of cerebrospinal fluid (CSF) needs to be aspirated for examination. Changes in the properties and composition of CSF can provide important information for the diagnosis of neurological diseases, such as determining the presence of infections, hemorrhages, tumors, or other lesions.

[0003] However, existing anesthetic puncture needles have shortcomings. During the process of extracting cerebrospinal fluid using anesthetic puncture needles, a large amount of cerebrospinal fluid will flow back into the puncture needle, which will have an adverse effect on the patient. At the same time, it is necessary to prepare special medical instruments to examine the cerebrospinal fluid, which not only adds to the operation process of medical staff, making the operation more cumbersome and complicated, but also reduces the overall testing efficiency to a certain extent, affecting the diagnosis and treatment process.

[0004] Therefore, this utility model provides an anesthetic puncture needle to solve the above problems. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides an anesthesia puncture needle that solves the aforementioned problems.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: an anesthesia puncture needle, comprising an outer needle tube and a needle hub connected to one end of the outer needle tube;

[0007] It also includes an inner needle body nested inside the outer needle tube and extending to the outside through the opening of the outer needle tube at one end. There is an annular gap between the inner wall of the outer needle tube and the outer wall of the inner needle body that can accommodate the passage of cerebrospinal fluid. The other end extends into the needle hub. The protruding end of the inner needle body is conical and at least one collection hole is opened on its outer wall near the end. A piston collector with one end communicating with the inner needle body is inserted through one end of the needle hub, and a one-way valve is provided at the connection between the piston collector and the inner needle body.

[0008] In the initial state of the piston collector, the piston blocks the inner needle body. When the piston collector pulls the piston outward, a negative pressure is generated in the collection hole, drawing cerebrospinal fluid into the cavity of the piston collector.

[0009] The outer wall of the piston collector is connected to a colorimetric branch tube equipped with a second one-way valve, which is used to connect an external colorimetric solution syringe.

[0010] Preferably, the number of collection holes is two, and they are arranged symmetrically from left to right.

[0011] Preferably, the end of the outer needle tube is a hollow frustum structure.

[0012] Preferably, the needle holder is composed of a hollow handle, a limiting part, a friction-enhancing strip, and a connecting part with multiple round holes on its surface. The limiting part is sleeved on the outer side of the end of the hollow handle near the outer needle tube. The friction-enhancing strip is equidistantly arranged on the outside of the hollow handle. The connecting part is sleeved on the outer side of the end of the hollow handle away from the outer needle tube.

[0013] Preferably, a positioning sleeve is fitted on the outer side of the piston collector near the needle seat. A plurality of insertion rods are connected to one side of the positioning sleeve. The insertion rods pass through corresponding circular holes and are interference-fitted with the corresponding circular holes.

[0014] Preferably, the outer needle tube is provided with a conduit with one end extending to the outer surface of the end of the outer needle tube and the other end extending into the needle hub. The outer wall of the needle hub is provided with an anesthesia branch tube with one end connected to the conduit. The anesthesia branch tube is used to connect an anesthetic injector.

[0015] Preferably, the outer needle tube is provided with a length scale on its exterior.

[0016] Beneficial effects

[0017] This invention provides an anesthesia puncture needle. Compared with the prior art, it has the following advantages:

[0018] (1) The anesthetic puncture needle, through the use of the inner needle body and the outer needle tube, can facilitate the puncture needle to enter the subarachnoid space. At the same time, it can pull the piston collector to draw the cerebrospinal fluid at the end of the inner needle body and store it in the internal cavity of the piston collector, so that it can be mixed with the colorimetric solution injected through the colorimetric branch tube, thereby enabling the cerebrospinal fluid to be colorimetrically processed, which facilitates rapid diagnosis by medical staff. In this process, the colorimetric solution will not come into contact with the human body, thus avoiding harm to the human body.

[0019] (2) The anesthetic puncture needle can be conveniently injected with anesthetic drugs through the catheter set in the outer needle tube. At the same time, the anesthetic drugs can directly enter the patient's body without being affected by external factors and cerebrospinal fluid reflux, making the flow more efficient and improving the injection efficiency. Attached Figure Description

[0020] Figure 1 This is a perspective view of the external structure of this utility model;

[0021] Figure 2 This is a schematic diagram showing the separation of the outer needle tube and the inner needle body of this utility model;

[0022] Figure 3 This is a schematic diagram of the internal cross-sectional structure of the outer needle tube in this utility model;

[0023] Figure 4This is a cross-sectional structural diagram of the inner needle body and the piston collector in this utility model.

[0024] In the diagram: 1. Outer needle tube; 2. Needle hub; 21. Hollow handle; 22. Limiting part; 23. Scrub strip; 24. Connecting part; 3. Inner needle body; 4. Piston collector; 5. Colorimetric branch tube; 6. Positioning sleeve; 7. Catheter; 8. Anesthesia branch tube; 9. Length scale. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example:

[0027] Please see Figure 1 and Figure 2 An anesthetic puncture needle includes an outer needle tube 1 with an opening at the end and a needle seat 2 connected to one end of the outer needle tube 1. The outer needle tube 1 is provided with a length scale 9, which facilitates medical staff to determine the insertion depth.

[0028] It also includes an inner needle body 3 nested inside the outer needle tube 1 and extending to the outside through the opening of the outer needle tube 1. The end of the outer needle tube 1 is a hollow frustum structure. There is an annular gap between the inner wall of the outer needle tube 1 and the outer wall of the inner needle body 3 that can accommodate the passage of cerebrospinal fluid. When the outer needle tube 1 and the inner needle body 3 are combined together, it is convenient to perform puncture and to insert into the subarachnoid space to aspirate cerebrospinal fluid. The other end extends into the needle hub 2. The protruding end of the inner needle body 3 is a pointed cone shape and at least one collection hole is opened near the end of its outer wall. There are two collection holes, which are arranged symmetrically on the left and right. The symmetrical arrangement of collection holes can avoid the collection hole in one direction being blocked, which would prevent the aspiration of cerebrospinal fluid.

[0029] One end of the needle holder 2 is fitted with a piston collector 4, which is connected to the inner needle body 3 at one end. The piston collector 4 has a volume scale on its outer side. The volume scale allows for easy mixing of cerebrospinal fluid and colorimetric solution in proportion, improving the colorimetric effect. A one-way valve is installed at the connection between the piston collector 4 and the inner needle body 3, allowing cerebrospinal fluid to enter the piston collector 4 through the inner needle body 3 without backflow, thus avoiding damage to the human body.

[0030] In the initial state of the piston collector 4, the piston blocks the inner needle body 3. When the piston collector 4 pulls the piston outward, the collection hole generates negative pressure, drawing cerebrospinal fluid into the cavity of the piston collector 4. The cerebrospinal fluid slowly enters the outer needle tube 1 through the annular gap between the outer needle tube 1 and the inner needle body 3, so that it can be absorbed by the collection hole, reducing the reflux of cerebrospinal fluid and avoiding damage to the patient.

[0031] like Figure 4 The outer wall of the piston collector 4 is connected to a colorimetric branch tube 5 equipped with a one-way valve 2, which is used to connect a colorimetric solution injector. After the colorimetric solution is injected into the internal cavity of the piston collector 4, it can mix with the cerebrospinal fluid to achieve the colorimetric effect.

[0032] like Figure 2 The needle holder 2 consists of a hollow handle 21, a limiting part 22, a friction-enhancing strip 23, and a connecting part 24 with multiple round holes on its surface. The limiting part 22 is sleeved on the outer side of the hollow handle 21 near the outer needle tube 1. The friction-enhancing strip 23 is equidistantly arranged on the outside of the hollow handle 21. The connecting part 24 is sleeved on the outer side of the hollow handle 21 away from the outer needle tube 1. A positioning sleeve 6 is sleeved on the outer side of the piston collector 4 near the needle holder 2. Multiple insertion rods are connected to one side of the positioning sleeve 6. The insertion rods pass through the corresponding round holes and are interference-fitted with the corresponding round holes. Through the cooperation of the positioning sleeve 6 and the connecting part 24, the piston collector 4 can be kept connected to the needle holder 2, which facilitates subsequent operations and prevents the inner needle body 3 from becoming loose.

[0033] like Figure 3 The outer needle tube 1 is provided with a conduit 7, one end of which passes through the outer surface of the end of the outer needle tube 1 and the other end extends into the needle seat 2. The outer wall of the needle seat 2 is provided with an anesthesia branch tube 8, one end of which is connected to the conduit 7. The anesthesia branch tube 8 is used to connect an anesthetic syringe. The anesthetic can be injected directly into the human body through the conduit 7, which is more efficient.

[0034] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An anesthetic puncture needle characterized by: It includes an outer needle tube (1) and a needle hub (2) connected to one end of the outer needle tube (1); It also includes an inner needle body (3) nested inside the outer needle tube (1) and extending to the outside through the opening of the outer needle tube (1). The inner wall of the outer needle tube (1) and the outer wall of the inner needle body (3) have an annular gap that can accommodate the passage of cerebrospinal fluid. The other end extends into the needle seat (2). The protruding end of the inner needle body (3) is conical and at least one collection hole is provided on its outer wall near the end. One end of the needle seat (2) is provided with a piston collector (4) that communicates with the inner needle body (3). A one-way valve is provided at the connection between the piston collector (4) and the inner needle body (3). In the initial state of the piston collector (4), the piston blocks the inner needle body (3). When the piston collector (4) pulls the piston outward, the collection hole generates negative pressure, drawing the cerebrospinal fluid at the end of the inner needle body (3) into the cavity of the piston collector (4). The outer wall of the piston collector (4) is connected to a colorimetric branch tube (5) equipped with a one-way valve, which is used to connect an external colorimetric solution syringe.

2. The anesthetic puncture needle of claim 1, wherein: The number of collection holes is two, and they are arranged symmetrically on the left and right.

3. A needle as defined in claim 2, wherein: The end of the outer needle tube (1) is a hollow frustum structure.

4. The anesthetic puncture needle of claim 3, wherein: The needle holder (2) consists of a hollow handle (21), a limiting part (22), a friction-enhancing strip (23), and a connecting part (24) with multiple round holes on its surface. The limiting part (22) is sleeved on the outer side of the hollow handle (21) near the outer needle tube (1). The friction-enhancing strip (23) is equidistantly arranged on the outside of the hollow handle (21). The connecting part (24) is sleeved on the outer side of the hollow handle (21) away from the outer needle tube (1).

5. The anesthetic puncture needle of claim 4, wherein: The piston collector (4) is fitted with a positioning sleeve (6) on the outer side of the end near the needle seat (2). A plurality of insert rods are connected to one side of the positioning sleeve (6). The insert rods pass through the corresponding round holes and are interference-fitted with the corresponding round holes.

6. The anesthetic puncture needle of claim 1, wherein: The outer needle tube (1) is provided with a conduit (7) with one end extending to the outer surface of the end of the outer needle tube (1) and the other end extending into the needle seat (2). The outer wall of the needle seat (2) is provided with an anesthesia branch tube (8) with one end connected to the conduit (7). The anesthesia branch tube (8) is used to connect an anesthetic syringe.

7. The anesthetic puncture needle of claim 1, wherein: The outer needle tube (1) is provided with a length scale (9) on its outside.

Images