Puncture needle assembly for lumbar anesthesia

Abstract

The lumbar anesthesia puncture needle assembly comprises an outer needle and a needle core, the outer needle comprises a needle body and a needle base, the needle base is arranged at the tail end of the needle body, the needle body defines a needle cavity, the needle base defines a transition cavity which is communicated with the needle cavity and at least partially in a transparent state, an indicating piece is arranged in the transition cavity, and the indicating piece is used for indicating whether liquid exists in the transition cavity or not. The spinal anesthesia puncture needle assembly can remind a doctor whether cerebrospinal fluid flows out or not through the state change of the indicating piece, and operation of medical staff is facilitated.

Description

Technical Field

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

[0002] The spinal anesthesia needle currently used is translucent, and medical staff need to rely entirely on the naked eye to see the transparent cerebrospinal fluid flowing out, and confirm that the cerebrospinal fluid has emptied the air inside the outer needle before the next operation can be performed. However, since the cerebrospinal fluid is a transparent liquid, it is difficult for the anesthesiologist to clearly see whether the cerebrospinal fluid is flowing out through naked eye observation. Especially for medical staff with poor eyesight, they need others to help confirm whether the cerebrospinal fluid is flowing out, which affects the medical staff's operation. In addition, some patients have low cerebrospinal fluid pressure and slow cerebrospinal fluid outflow, which will also affect the anesthesiologist's judgment on whether there is cerebrospinal fluid outflow. If a misjudgment occurs, unnecessary repeated punctures may occur, causing harm to the patient. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a spinal anesthesia puncture needle assembly, which can remind doctors whether cerebrospinal fluid has flowed out through the state change of the indicator, which is convenient for medical staff to operate.

[0004] To achieve the above-mentioned purpose, according to an embodiment of the utility model, a spinal anesthesia puncture needle assembly is proposed, and the spinal anesthesia puncture needle assembly comprises: an outer needle and a needle core, the outer needle comprises a needle body and a needle seat, the needle seat is arranged at the rear end of the needle body, the needle body defines a needle cavity, the needle seat defines a transition cavity which is connected to the needle cavity and is at least partially transparent, an indicator is arranged in the transition cavity, and the indicator is used to indicate whether there is liquid in the transition cavity.

[0005] According to the spinal anesthesia puncture needle assembly of the embodiment of the utility model, the spinal anesthesia puncture needle assembly can remind the doctor whether cerebrospinal fluid has flowed out through the state change of the indicator, which is convenient for medical staff to operate.

[0006] In addition, the spinal anesthesia puncture needle assembly according to the above embodiment of the utility model may also have the following additional technical features:

[0007] According to an embodiment of the utility model, the indicator comprises a color strip disposed on a side wall of the transition cavity, and the color strip changes color when in contact with water.

[0008] According to an embodiment of the present invention, the color-developing strip comprises a color-developing strip whose surface is covered with a one-way water-permeable film.

[0009] According to an embodiment of the present invention, the color-developing strip is embedded in the side wall of the transition cavity.

[0010] According to an embodiment of the present invention, in the circumferential direction of the side wall of the transition cavity, the coverage ratio of the color-developing strip is not higher than one quarter.

[0011] According to an embodiment of the utility model, a plurality of the color-developing strips are provided on the side wall of the transition cavity, and the plurality of the color-developing strips are arranged in sequence in the length direction of the needle body, and any one of the color-developing strips is independently arranged relative to the other color-developing strips.

[0012] According to an embodiment of the present invention, at least one of the plurality of color-developing strips is disposed on a side wall of the transition cavity close to one end of the needle body.

[0013] According to an embodiment of the present invention, at least one of the plurality of color-developing strips is disposed on an end of the side wall of the transition cavity away from the needle body.

[0014] According to an embodiment of the utility model, a position indicating structure is provided on the needle seat, and the position indicating structure is arranged in the same direction as the injection hole of the needle body in the circumferential direction.

[0015] According to an embodiment of the utility model, the position indicating structure includes an indicating point, the color display strip is arranged to avoid the indicating point in the radial direction, and the color of the color display strip before and after changing color in contact with water are different from the color of the indicating point.

[0016] According to an embodiment of the present invention, the color display strip and the display point are arranged at 90° in the circumferential direction.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of an outer needle according to an embodiment of the utility model;

[0020] Figure 2 yes Figure 1 Sectional view at AA;

[0021] Figure 3 is a cross-sectional view of an outer needle according to an embodiment of the utility model;

[0022] Figure 4 yes Figure 1 A partial enlarged view at point B.

[0023] Reference numerals:

[0024] Outer needle 100 , needle seat 1 , transition cavity 11 , first cavity 111 , second cavity 112 , socket 12 , needle body 2 , injection hole 21 , color development strip 3 , color development strip 31 , one-way water permeable membrane 32 , indication site 4 . DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The spinal anesthesia puncture needle assembly according to an embodiment of the utility model is described below with reference to the accompanying drawings.

[0029] like Figure 1-Figure 3 As shown, the spinal anesthesia puncture needle assembly according to the embodiment of the utility model includes: an outer needle 100 and a needle core.

[0030] Intraneural anesthesia includes spinal anesthesia and epidural anesthesia. Spinal anesthesia needs to be performed using a spinal anesthesia puncture needle assembly. The spinal anesthesia puncture needle assembly includes: an outer needle 100 and a needle core, wherein the outer needle 100 includes a needle body 2 and a needle seat 1, the needle seat 1 is arranged at the rear end of the needle body 2, the needle body 2 defines a needle cavity, and the needle seat 1 defines a transition cavity 11 that is connected to the needle cavity and is in a transparent state.

[0031] During the spinal anesthesia operation, the intervertebral space is first located, and the very thin outer needle 100 needle body 2 is sequentially passed through the skin, subcutaneous tissue, supraspinous ligament, interspinous ligament, yellow ligament, dura mater, arachnoid membrane, and reaches the subarachnoid space. Before injecting anesthetic drugs, it is necessary to confirm whether cerebrospinal fluid flows into the transition cavity 11. If no cerebrospinal fluid flows into the transition cavity 11, it can be judged that the puncture position is wrong and a second puncture is required. If cerebrospinal fluid flows into the transition cavity 11, wait for the cerebrospinal fluid in the transition cavity 11 to overflow, and after the cerebrospinal fluid empties the air inside the outer needle 100, connect the syringe and inject drugs through the outer needle 100.

[0032] The spinal anesthesia needle currently used is translucent, and medical staff need to rely entirely on the naked eye to see the transparent cerebrospinal fluid flowing out, and confirm that the cerebrospinal fluid has emptied the air inside the outer needle before the next operation can be performed. However, since the cerebrospinal fluid is a transparent liquid, it is difficult for the anesthesiologist to clearly see whether the cerebrospinal fluid is flowing out through naked eye observation. Especially for medical staff with poor eyesight, they need others to help confirm whether the cerebrospinal fluid is flowing out, which affects the medical staff's operation. In addition, some patients have low cerebrospinal fluid pressure and slow cerebrospinal fluid outflow, which will also affect the anesthesiologist's judgment on whether there is cerebrospinal fluid outflow. If a misjudgment occurs, unnecessary repeated punctures may occur, causing harm to the patient.

[0033] To this end, the embodiment of the utility model designs a spinal anesthesia puncture needle assembly with an indicator provided in the transition cavity 11, and the indicator is used to indicate whether there is liquid in the transition cavity 11. Therefore, when cerebrospinal fluid appears in the transition cavity 11, the indicator changes. The change is mainly a visual change, and the change is more obvious, which is conducive to the medical staff to see clearly, so that the indicator can indicate to the medical staff, reminding the medical staff that the cerebrospinal fluid has flowed out and the next operation can be carried out.

[0034] According to the spinal anesthesia puncture needle assembly of the embodiment of the utility model, the spinal anesthesia puncture needle assembly can remind the doctor whether cerebrospinal fluid has flowed out through the state change of the indicator, which is convenient for medical staff to operate.

[0035] In some embodiments, the indicator includes a color-changing plug-in, which is detachably inserted into the transition cavity 11 through the socket 12 at the rear end of the needle seat 1. The partial structure of the color-changing plug-in inserted into the transition cavity 11 changes color when exposed to water. Medical staff can obtain information on whether cerebrospinal fluid has flowed out based on the color change of the color-changing plug-in, which is convenient for medical staff to operate. A vent is provided on the color-changing plug-in to prevent the insertion of the plug-in from blocking the socket 12, resulting in excessive pressure in the transition cavity 11 and the needle cavity, and the cerebrospinal fluid cannot flow out. Furthermore, a handle structure is also provided on the color-changing plug-in, and medical staff can conveniently insert the color-changing plug-in into the transition cavity 11 through the handle structure.

[0036] When repeated punctures are needed, the color-changing plug-in can be replaced to determine whether cerebrospinal fluid has flowed out during each puncture, which facilitates medical operations.

[0037] In other embodiments, the transition cavity 11 is formed into a shape similar to a convex lens with a middle convexity and gradually narrowing on both sides. The indicator includes an indicator point, which is arranged on the cavity wall of the middle convex portion of the transition cavity 11. When the cerebrospinal fluid fills the transition cavity 11, the transparent liquid forms a convex lens, which can magnify the image of the posterior structure. Medical staff can judge that the transition cavity 11 is full of cerebrospinal fluid based on the enlarged indicator point and can proceed to the next operation.

[0038] In some further embodiments, Figure 1-Figure 3 As shown, the indicator includes a color strip 3, and the color strip 3 that changes color when it comes into contact with water is provided on the side wall of the transition cavity 11. The transition cavity 11 is at least partially transparent, and the side wall of the transition cavity 11 is provided with a color strip 3, and the color strip 3 changes color when it comes into contact with water. Therefore, when the cerebrospinal fluid flows out and reaches the transition cavity 11, the color strip 3 provided on the side wall of the transition cavity 11 will react quickly and change color to indicate to the medical staff, reminding them that the cerebrospinal fluid has flowed out, and no secondary puncture is required. The next operation can be performed after the cerebrospinal fluid overflows. Therefore, the spinal anesthesia puncture needle assembly can remind the doctor whether the cerebrospinal fluid has flowed out through the color change of the color strip 3, which is convenient for the medical staff to operate.

[0039] Reference Figure 2 and Figure 3 The color strip 3 includes a color strip 31 covered with a one-way water-permeable membrane 32. Therefore, when the cerebrospinal fluid flows into the transition cavity 11, part of the liquid will pass through the one-way water-permeable membrane 32 and contact the color strip 31. The color strip 31 changes color when it comes into contact with water, indicating to the medical staff that the cerebrospinal fluid has flowed out. Since the one-way water-permeable membrane 32 is only permeable in one direction, the part of the liquid that contacts the color strip 31 will not pass through the one-way water-permeable membrane 32 back into the transition cavity 11, and will not affect the purity of the liquid in the transition cavity 11 and the needle cavity.

[0040] like Figure 2 and Figure 3As shown, the color strip 3 is embedded in the side wall of the transition chamber 11 to prevent the setting of the color strip 3 from affecting the liquid transportation in the needle cavity and the transition chamber 11. At the same time, the wall surface of the transition chamber 11 is used to fix the color strip 3 to prevent the position of the color strip 3 from moving. At the same time, it is beneficial for the one-way water-permeable membrane 32 to achieve a one-way water-permeable effect and prevent liquid from leaking out from the side of the color strip 3.

[0041] like Figure 2 As shown, on the circumference of the inner wall of the transition cavity 11, the coverage ratio of the color strip 3 is not higher than one quarter, that is, on the cross-section of the outer needle 100 perpendicular to the length direction of the needle body 2, the angle α of the line connecting the two sides of the width direction of the color strip 3 and the center position of the transition cavity is not greater than 90°, so that the transparent cavity can at least partially remain in a transparent state. Medical staff can directly observe the liquid in the transition cavity 11 with the naked eye. On the one hand, they can observe the state of the liquid in the transition cavity 11 to avoid the presence of foreign matter. On the other hand, they can also use the traditional direct naked eye observation method to observe whether the cerebrospinal fluid has flowed out after the color test paper fails.

[0042] In some embodiments, Figure 1 and Figure 3 As shown, since the color strip 3 is water-absorbent, when one end of the color strip 3 contacts the liquid, the liquid will quickly infiltrate the entire color strip 3, causing the color strip 3 to change color as a whole, and it is impossible to clearly indicate the cerebrospinal fluid content in the transition cavity 11. Therefore, a plurality of color strips 3 are provided on the side wall of the transition cavity 11, and the plurality of color strips 3 are arranged in sequence in the length direction of the needle body 2. Thus, the plurality of color strips 3 can gradually change color along with the change of the liquid level in the transition cavity 11. By observing the amount of color change and the color change trajectory of the color strip 3, medical staff can determine the content of cerebrospinal fluid in the transition cavity 11, and inject drugs after the transition cavity 11 is filled with cerebrospinal fluid.

[0043] Among them, any one of the color-developing strips 3 is independently arranged relative to the other color-developing strips 3 to avoid the situation where, after one of the color-developing strips 3 contacts the liquid, the other color-developing strips 3 absorb the liquid and change color without contacting the liquid surface due to the water absorption effect of the color-developing strip 3, which causes the medical staff to make inaccurate judgments on the liquid content in the transition chamber 11. It is ensured that each color-developing strip 3 can only change color and indicate after contacting the liquid surface, thereby improving the accuracy of the indication content.

[0044] Furthermore, at least one of the multiple color strips 3 is arranged on the side wall of the transition cavity 11 near one end of the needle body 2. Therefore, when the color strip 3 arranged on the side wall of the transition cavity 11 near one end of the needle body 2 changes color, it can indicate to the medical staff that the cerebrospinal fluid has flowed out, so as to avoid the medical staff from misjudging the puncture position as wrong when the patient's cerebrospinal fluid pressure is low and the cerebrospinal fluid outflow content is small, causing the medical staff to repeatedly puncture.

[0045] Furthermore, at least one of the multiple color strips 3 is arranged on the side wall of the transition chamber 11 away from the end of the needle body 2. Therefore, when the color strip 3 arranged on the side wall of the transition chamber 11 away from the end of the needle body 2 changes color, it can indicate to the medical staff that the cerebrospinal fluid is about to overflow, and the medical staff can prepare for drug injection.

[0046] Reference Figure 1 and Figure 2 and Figure 4 In some embodiments, a positioning structure is provided on the needle seat 1. Specifically, an injection hole 21 is formed at the other end of the needle body 2. The positioning structure is arranged in the same direction as the injection hole 21 of the needle body 2 in the circumferential direction of the needle body 2, so that after the needle body 2 is inserted into the patient's body, the medical staff is reminded of the direction of the injection hole 21 of the needle body 2, which is convenient for medical operations.

[0047] In some embodiments, the indicating structure includes an indicating point 4, and the color strip 3 is radially arranged to avoid the indicating point 4 to avoid the setting of the color strip 3 affecting the medical staff's observation of the indicating point 4, and at the same time avoid the color of the indicating point 4 interfering with the medical staff's observation of the color of the color strip 3.

[0048] Furthermore, in order to further avoid mutual interference between the indication information of the color strip 3 and the indication point 4, the color of the color strip 3 before and after changing color in water are different from the color of the indication point 4. Therefore, it is not easy for medical staff to regard the color of the indication point 4 as the color of the color strip 3, nor is it easy to regard the color strip 3 as the indication structure of the injection hole 21, which is convenient for medical staff to understand and operate.

[0049] Reference Figure 2 The color strip 3 and the indicating point 4 are arranged at 90° in the circumferential direction. Therefore, the color strip 3 will not block the medical staff from observing the indicating point 4 in the radial direction, and the indicating point 4 will not affect the medical staff from observing the color change of the color strip 3. In some conditions where the display strip 3 blocks the indicating point 4 and makes it difficult to observe the indicating point, the medical staff can indirectly judge the position of the indicating point 4 through the position of the color strip 3.

[0050] In other embodiments, the positioning structure includes a color strip 3, that is, the oblique cut is oriented in the same direction as the color strip 3, so that the color strip 3 is arranged in the same direction as the injection hole 21 of the needle body 2 in the circumferential direction of the needle body 2. Medical staff can directly determine the direction of the injection hole 21 by observing the position of the color strip 3, thereby realizing functional integration and simplifying the structure of the spinal anesthesia puncture needle assembly.

[0051] In order to ensure that the color strip 3 can indicate the direction of the injection hole 21 before and after it changes color in water, the color of the color strip 3 before and after it changes color in water is opaque to facilitate observation by medical staff.

[0052] Reference Figure 3 The transition cavity 11 includes a first cavity 111 having a conical radial cross section and a second cavity 112 having a rectangular radial cross section. The cavity wall of the first cavity 111 gradually expands in a direction away from the needle body 2. The second cavity 112 connected to the first cavity 111 is arranged on a side of the first cavity 111 away from the needle body 2.

[0053] The needle seat 1 is provided with a socket 12 which is communicated with the transition cavity 11 . The needle core enters the transition cavity 11 through the socket 12 and enters the needle cavity through the guidance of the first cavity 111 having a conical cross section.

[0054] A specific embodiment of the spinal anesthesia puncture needle assembly of the utility model is described below with reference to the drawings.

[0055] like Figure 1 and Figure 3 As shown, the spinal anesthesia puncture needle assembly provided according to the embodiment of the utility model includes an outer needle 100 and a needle core. The outer needle 100 includes a needle seat 1, a needle body 2, an indicator point 4 and a plurality of color strips 3. The needle seat 1 is arranged at the rear end of the needle body 2, and the needle body 2 defines a needle cavity. The other end of the needle body 2 is formed with an injection hole 21, and the injection hole 21 is oriented in the same direction as the indicator point 4, which is convenient for doctors to accurately judge the direction of the injection hole 21 of the needle body 2. The needle seat 1 defines a transition cavity 11 that is connected to the needle cavity and is in a transparent state, and the rear end of the needle seat 1 is provided with a socket 12 that is connected to the transition cavity 11.

[0056] During the spinal anesthesia operation, the intervertebral space is first located, and a very thin outer needle 100 needle body 2 is used to sequentially penetrate the skin, subcutaneous tissue, supraspinous ligament, interspinous ligament, yellow ligament, dura mater, arachnoid membrane, and reach the subarachnoid space. Before injecting anesthetic drugs, it is necessary to confirm whether cerebrospinal fluid flows into the transition cavity 11 and flows to the needle tail, and at the same time, the air in the needle body 2 is emptied, and then the syringe is connected through the socket 12, and the drug is injected through the outer needle 100.

[0057] A color strip 3 that changes color when exposed to water is provided on the side wall of the transition chamber 11. The color strip 3 includes a color strip 31 whose surface is covered with a one-way water-permeable membrane 32, and the color strip 3 is embedded in the side wall of the transition chamber 11 to prevent the setting of the color strip 3 from affecting the liquid transportation in the needle cavity and the transition chamber 11. At the same time, the color strip 3 is fixed by the wall surface of the transition chamber 11 to prevent the position of the color strip 3 from moving, and at the same time, it is beneficial for the one-way water-permeable membrane 32 to achieve a one-way water permeability effect, and prevent the liquid from leaking out from the side of the color strip 3.

[0058] When cerebrospinal fluid flows into the transition cavity 11, part of the liquid will pass through the one-way water permeable membrane 32 and contact the color strip 31. The color strip 31 changes color when it comes into contact with water, indicating to the medical staff that the cerebrospinal fluid has flowed out and the next operation can be carried out. Therefore, the spinal anesthesia puncture needle assembly can remind the doctor whether the cerebrospinal fluid has flowed out through the color change of the color strip 3, which is convenient for the medical staff to operate.

[0059] Since the one-way water-permeable membrane 32 is only water-permeable in one direction, the liquid in this part after contacting the color-developing strip 31 will not pass through the one-way water-permeable membrane 32 back into the transition cavity 11, and will not affect the purity of the liquid in the transition cavity 11 and the needle cavity.

[0060] The width direction of the color strip 3 extends along the circumferential direction of the inner wall of the transition cavity 11, and the length direction of the color strip 3 extends along the length direction of the outer needle 100. On the circumferential direction of the inner wall of the transition cavity 11, the coverage ratio of the color strip 3 is not higher than one-fourth, so that the transparent cavity can at least partially remain in a front-to-back transparent state before and after the color change. Medical staff can directly observe the liquid in the transition cavity 11 with the naked eye. On the one hand, they can observe the state of the liquid in the transition cavity 11 to avoid the presence of foreign matter. On the other hand, they can also use traditional direct naked eye observation to observe whether cerebrospinal fluid has flowed out after the color test paper fails.

[0061] Reference Figure 2 The color strip 3 and the indicating point 4 are arranged at 90° in the circumferential direction. Therefore, the color strip 3 will not block the medical staff from observing the indicating point 4 in the radial direction, and the indicating point 4 will not affect the medical staff from observing the color change of the color strip 3. In some difficult-to-observe conditions, the medical staff can indirectly judge the position of the indicating point 4 through the position of the color strip 3.

[0062] Furthermore, in order to further avoid mutual interference between the indication information of the color strip 3 and the indication point 4, the color of the color strip 3 before and after it changes color in water are different from the color of the indication point 4. Therefore, it is not easy for medical staff to regard the color of the indication point 4 as the color of the color strip 3, nor is it easy to regard the color strip 3 as the indication structure of the injection hole 21, which is convenient for medical staff to understand and operate.

[0063] A plurality of color strips 3 are provided on the side wall of the transition cavity 11, and the plurality of color strips 3 are arranged in sequence in the length direction of the needle body 2. Thus, the plurality of color strips 3 can gradually change color along with the change of the liquid level in the transition cavity 11. By observing the number of color changes and the color change trajectory of the color strips 3, the medical staff can judge the content of cerebrospinal fluid in the transition cavity 11, and inject the drug after the transition cavity 11 is filled with cerebrospinal fluid.

[0064] Among them, any one of the color-developing strips 3 is independently arranged relative to the other color-developing strips 3 to avoid the situation where, after one of the color-developing strips 3 contacts the liquid, the other color-developing strips 3 absorb the liquid and change color without contacting the liquid surface due to the water absorption effect of the color-developing strip 3, which causes the medical staff to make inaccurate judgments on the liquid content in the transition chamber 11. It is ensured that each color-developing strip 3 can only change color and indicate after contacting the liquid surface, thereby improving the accuracy of the indication content.

[0065] Furthermore, one of the multiple color strips 3 is provided on the side wall of the transition cavity 11 near one end of the needle body 2. Therefore, when the color strip 3 provided on the side wall of the transition cavity 11 near one end of the needle body 2 changes color, it can indicate to the medical staff that the cerebrospinal fluid has flowed out, so as to avoid the medical staff from misjudging the puncture position as wrong when the patient's cerebrospinal fluid pressure is low and the cerebrospinal fluid outflow content is small, causing the medical staff to repeatedly puncture.

[0066] Furthermore, one of the multiple color strips 3 is provided on the side wall of the transition chamber 11 away from the end of the needle body 2. Therefore, when the color strip 3 provided on the side wall of the transition chamber 11 away from the end of the needle body 2 changes color, it can indicate to the medical staff that the cerebrospinal fluid is about to overflow, and the medical staff can prepare for drug injection.

[0067] A gripping portion is formed on the needle seat 1, and the gripping portion is also made of a transparent material. In this way, when the doctor uses the outer needle 100 for puncture, he can hold the gripping portion with his fingers to facilitate the puncture operation.

[0068] One end of the needle core can be inserted into the transition cavity 11 and the needle cavity from the socket 12, and the protective cap is connected to the other end of the needle core and can cover the socket 12. In this way, when the spinal anesthesia puncture needle is not in use, the needle core can be inserted into the transition cavity 11 and the needle cavity to prevent foreign matter from entering the transition cavity 11 and the needle cavity. At the same time, the socket 12 is protected by the protective cap to prevent contamination or damage at the socket 12.

[0069] At the same time, when using the spinal anesthesia puncture needle assembly for puncture, the needle core is first inserted into the needle cavity, and then the spinal anesthesia puncture needle assembly is used as a whole for puncture. At this time, the needle cavity of the needle body 2 is filled solid, which can prevent human tissue from entering the needle cavity during the puncture process, avoiding problems such as needle cavity blockage.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0071] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A spinal anesthesia puncture needle assembly, characterized in that: include: An outer needle and a needle core, the outer needle includes a needle body and a needle seat, the needle seat is arranged at the rear end of the needle body, the needle body defines a needle cavity, the needle seat defines a transition cavity that is connected to the needle cavity and is at least partially transparent, an indicator is arranged in the transition cavity, and the indicator is used to indicate whether there is liquid in the transition cavity.

2. The spinal anesthesia puncture needle assembly according to claim 1, characterized in that: The indicator comprises a color strip disposed on the side wall of the transition cavity, and the color strip changes color when in contact with water.

3. The spinal anesthesia puncture needle assembly according to claim 2, characterized in that: The color development strip comprises a color development strip whose surface is covered with a one-way water permeable film.

4. The spinal anesthesia puncture needle assembly according to claim 2, characterized in that: The color developing strip is embedded in the side wall of the transition cavity.

5. The spinal anesthesia puncture needle assembly according to claim 2, characterized in that: In the circumferential direction of the side wall of the transition cavity, the coverage ratio of the color-developing strip is no more than one quarter.

6. The spinal anesthesia puncture needle assembly according to any one of claims 2 to 5, characterized in that: The side wall of the transition cavity is provided with a plurality of the color-developing strips, which are arranged in sequence in the length direction of the needle body, and any one of the color-developing strips is independently arranged relative to the other color-developing strips.

7. The spinal anesthesia puncture needle assembly according to claim 6, characterized in that: At least one of the plurality of color-developing strips is arranged on the side wall of the transition cavity close to one end of the needle body.

8. The spinal anesthesia puncture needle assembly according to claim 6, characterized in that: At least one of the plurality of color-developing strips is arranged on an end of the side wall of the transition cavity away from the needle body.

9. The spinal anesthesia puncture needle assembly according to any one of claims 2 to 5, characterized in that: The needle seat is provided with a position indicating structure, which is arranged in the same direction as the injection hole of the needle body in the circumferential direction. The position indicating structure includes an indicating point. The color display strip is arranged radially to avoid the indicating point, and the color of the color display strip before and after changing color in contact with water are different from the color of the indicating point.

10. The spinal anesthesia puncture needle assembly according to claim 9, characterized in that: The color-developing strip and the indicating point are arranged at 90° in the circumferential direction.

Images