Multi-channel needle head device

Abstract

The multi-channel needle device comprises a base, an outer needle tube and an inner needle tube, a first channel penetrating through the base is formed in the base, and two steps are arranged on the inner wall of the first channel; the near end of the outer needle tube is inserted into the base and abuts against the second step. The near end of the inner needle tube is inserted into the base and abuts against the first step, the inner needle tube is arranged in the outer needle tube in a sleeved mode, and a channel exists between the outer wall of the inner needle tube and the inner wall of the outer needle tube. The second channel is arranged on the base, and the second channel is communicated with the outer side surface of the base and the channel; the far-end position of the inner needle tube is higher than the far-end position of the outer needle tube. According to the multi-channel needle head device disclosed by the invention, the microspheres are separated from the preserving fluid or the supernate while the air pressure is balanced through the two groups of channels, and the microspheres can be prevented from being discharged along with the preserving fluid or the supernate in the separation process.

Description

Technical Field

[0001] This application relates to the technical field of medical devices, and particularly to a multi-channel needle device. Background Art

[0002] The microsphere interventional therapy is widely used in human interventional surgeries, mainly in the fields of interventional radiology and transcatheter embolization. Microspheres can be directly delivered to the target tissue or blood vessel through vascular intervention, and can accurately deliver drugs or chemical substances to the target area. Microspheres are usually mixed with a preservation solution and stored in a vial for single use by patients.

[0003] Before the microsphere surgery, the microspheres in the vial need to be transferred to a syringe for standby. During the transfer process, the microspheres need to be separated from the preservation solution, and the microspheres cannot be taken out with the preservation solution during the separation to avoid waste. Finally, the microspheres need to be retained in the syringe for standby, and the preservation solution is retained in the vial.

[0004] In addition, for the surgery of drug-loaded microspheres, first, the microspheres in the vial need to be transferred to a syringe, and then the microspheres in the syringe are mixed with the diluted drug solution; after the microspheres and the drug solution are mixed, a certain period of time is required to complete the drug-loading process; finally, the supernatant in the syringe is discharged. Finally, the drug-loaded microspheres in the syringe are retained in the syringe for standby, and the preservation solution is retained in the vial.

[0005] Currently, the separation of microspheres from the preservation solution usually adopts the method of syringe aspiration. First, two needles are inserted into the vial, one for connecting to the syringe and the other for balancing the air pressure in the vial. The vial is tilted downward to deposit the microspheres at the upper end of the vial for convenient aspiration while connecting to the syringe needle, and at the same time, excessive tilting is avoided to prevent the microspheres from depositing at the bottle stopper and causing waste. The bevel of the needle is aligned with the deposition position of the microspheres, and the injection rod is pulled to aspirate. After aspiration, the syringe needle is placed upright and left standing for about a few minutes until the microspheres precipitate at the bottom of the syringe. The preservation solution on the upper layer of the syringe is pushed back into the vial, and only the microspheres are retained in the syringe for standby. For example, Chinese Utility Model Patent CN203898856U discloses a double-barrel syringe, which can correct the negative pressure in the vial while aspirating drugs by setting two barrels with different lengths and non-connected. However, this type of syringe only provides a solution for the negative pressure during the aspiration of liquid drugs, and with two barrels set, the device is complex, and it does not involve how to quickly separate the microspheres from the preservation solution or supernatant in a mixed solution containing microspheres, and minimize the waste caused by the microspheres being discharged together with the preservation solution or supernatant during the separation process. Summary of the Utility Model

[0006] In view of at least one of the above problems existing in the prior art, the present application provides a multi-channel needle device, which realizes the correction of negative pressure in the bottle and separates the microspheres from the preservation solution or supernatant by providing two sets of channels in one needle, and can also prevent the microspheres from being discharged together with the preservation solution or supernatant during the separation process.

[0007] The above object of the present application is achieved by the following technical solutions:

[0008] In a first aspect, the present application provides a multi-channel needle device, which is characterized by including:

[0009] A base, an inner needle tube and an outer needle tube;

[0010] A first channel, passing through the base and communicating with the inner needle tube, and a first step and a second step are provided on the inner wall of the first channel;

[0011] The proximal end of the outer needle tube is inserted into the base and abuts against the second step;

[0012] The proximal end of the inner needle tube is inserted into the base and abuts against the first step. The inner needle tube is sleeved inside the outer needle tube, and there is a channel between the outer wall of the inner needle tube and the inner wall of the outer needle tube;

[0013] A second channel, provided on the base, and the second channel communicates with the outer side surface of the base and the channel;

[0014] Wherein, the total length of the inner needle tube and the base is greater than the total length of the outer needle tube and the base.

[0015] In a possible implementation manner of the first aspect, the width of the channel between the inner needle tube and the outer needle tube is uniform.

[0016] In a possible implementation manner of the first aspect, the width of the channel between the inner needle tube and the outer needle tube is non-uniform.

[0017] In a possible implementation manner of the first aspect, there are multiple independent channels between the outer wall of the inner needle tube and the inner wall of the outer needle tube.

[0018] In a possible implementation manner of the first aspect, the difference between the length of the part of the outer needle tube outside the base and the length of the part of the inner needle tube outside the base is greater than 1 mm.

[0019] In a second aspect, the present application further provides a multi-channel needle device, including:

[0020] A base, an inner needle tube and an outer needle tube;

[0021] A first channel, passing through the base and communicating with the inner needle tube, and a step is provided on the inner wall of the first channel;

[0022] The proximal end of the inner needle tube is inserted into the base and abuts against the step;

[0023] The outer needle tube has a channel;

[0024] A second channel is provided on the base, and the second channel communicates with the outer side surface and the channel of the base;

[0025] Wherein, the total length of the inner needle tube and the base is greater than the total length of the outer needle tube and the base.

[0026] In a possible implementation manner of the second aspect, the difference in length between the portion of the inner needle tube outside the base and the portion of the outer needle tube outside the base is greater than 1 mm.

[0027] In a possible implementation manner of the second aspect, the number of channels is multiple.

[0028] The beneficial effects of the present application are as follows:

[0029] The multi-channel needle device provided by the present application can balance the internal and external pressures of the vial when extracting microspheres from the vial, realizing the one-time extraction of all microspheres; when discharging the supernatant, it can still balance the internal and external pressures of the vial, enabling the supernatant to be completely returned to the vial during a single discharge process. It simplifies the operation of separating microspheres from the liquid, reduces the waste caused by the discharge of microspheres with the liquid, completes the operation at one time, avoids potential contamination caused by repeated operations, and can also avoid waste of microspheres. Description of the Drawings

[0030] Figure 1 is a schematic external view of a multi-channel needle device provided by the present application.

[0031] Figure 2 is a schematic internal structure view of a multi-channel needle device provided by the present application.

[0032] Figure 3 is a schematic view of the shape of a channel provided by the present application.

[0033] Figure 4 is a schematic view of the shape of another channel provided by the present application.

[0034] Figure 5 is a schematic view of a multi-channel needle device provided by the present application inserted into a vial.

[0035] Figure 6 is a schematic view of making microspheres gather at the bottom of a vial provided by the present application.

[0036] Figure 7 is a schematic view of making microspheres gather at the bottom of a syringe provided by the present application.

[0037] Figure 8It is a schematic diagram of returning the preservation solution to the vial provided by this application.

[0038] Figure 9 It is a schematic diagram of the shape of another multi-channel needle device provided by this application.

[0039] In the figure, 1 is the base, 2 is the first channel, 3 is the outer needle tube, 4 is the inner needle tube, 5 is the second channel, 10 is the channel, 21 is the first step, 22 is the second step, 7 is the syringe, 8 is the air, 9 is the preservation solution, and 11 is the microsphere. Detailed implementation manners

[0040] The following further elaborates on the technical solutions in this application in conjunction with the attached drawings.

[0041] In this application document, "proximal end" refers to the end close to the operator, and "distal end" refers to the end far from the operator.

[0042] This application discloses a multi-channel needle device. Please refer to Figure 1 and Figure 2 , in some examples, the multi-channel needle device disclosed in this application includes a base 1, an inner needle tube 4, and an outer needle tube 3. There is a first channel 2 inside the base 1, and the first channel 2 penetrates through the base 1. Specifically, the first channel 2 communicates with the inner needle tube 4 from the proximal end of the base 1.

[0043] There are two steps provided on the inner wall of the first channel 2, that is, the structure of the first channel 2 is similar to a stepped hole. Among them, the first step 21 is used to fix the inner needle tube 4, and the second step 22 is used to fix the outer needle tube 3.

[0044] The proximal end of the inner needle tube 4 is inserted into the first channel 2 and abuts against the first step 21, and the distal end is located outside the base 1; the proximal end of the outer needle tube 3 is inserted into the first channel 2 and abuts against the second step 22, and the distal end is also located outside the base 1.

[0045] The inner needle tube 4 is sleeved inside the outer needle tube 3, and there is a channel 10 between the outer wall of the inner needle tube 4 and the inner wall of the outer needle tube 3. There is also a second channel 5 on the base 1, and the second channel 5 communicates the outer side surface of the base 1 and the channel 10.

[0046] In some possible implementation manners, please refer to Figure 3 , the width of the channel 10 between the inner needle tube 4 and the outer needle tube 3 is uniform. When the cross-sectional shapes of both the inner needle tube 4 and the outer needle tube 3 are circular, the axes of the inner needle tube 4 and the outer needle tube 3 are on the same straight line.

[0047] In some possible implementation manners, please refer to Figure 4, the axis of the inner needle tube 4 is not on the same straight line as the axis of the outer needle tube 3. When the cross-sectional shapes of both the inner needle tube 4 and the outer needle tube 3 are circular, the width of the channel 10 is uneven.

[0048] In some possible implementation manners, there are multiple independent channels 10 between the outer wall of the inner needle tube 4 and the inner wall of the outer needle tube 3. For example, there are multiple dividing wings on the inner wall of the outer needle tube 3, dividing the space between the outer wall of the inner needle tube 4 and the inner wall of the outer needle tube 3 into multiple independent regions.

[0049] As can be seen from the above description, for the syringe of the multi-channel needle device disclosed in the present application, which is described herein in combination with a vial and the microspheres in the vial, the outer needle tube 3 and the inner needle tube 4 respectively provide a path. That is, the multi-channel needle device disclosed in the present application provides two paths. The path provided by the inner needle tube 4 connects the space inside the vial with the space inside the syringe; the path provided by the outer needle tube 3 connects the space inside the vial with the space outside the vial. That is, the space outside the vial is connected to the channel 10 through the second channel 5, and the channel 10 is connected to the space inside the vial.

[0050] The total length of the inner needle tube 4 and the base 1 is greater than the total length of the outer needle tube 3 and the base 1. Here, the total length of the inner needle tube 4 and the base 1 refers to the total length of the two after the inner needle tube 4 is inserted into the base 1, and the total length of the outer needle tube 3 and the base 1 refers to the total length of the two after the outer needle tube 3 is inserted into the base 1.

[0051] Describing from another perspective, the length of the part of the inner needle tube 4 outside the base 1 needs to be greater than the length of the part of the outer needle tube 3 outside the base 1 to prevent the microspheres in the vial from entering the channel 10. That is: the inner needle tube 4 extends a distance away from the base 1 from inside the outer needle tube 3 to ensure that when the inner needle tube 4 extracts the microspheres in the vial, the outer needle tube 3 will not suck in the microspheres, resulting in the microspheres and the preservation liquid being discharged from the outer needle tube 3.

[0052] In some possible implementation manners, the difference between the length of the part of the outer needle tube 3 outside the base 1 and the length of the part of the inner needle tube 4 outside the base 1 is greater than 1 mm.

[0053] The specific usage method is as follows:

[0054] Please refer to Figure 5 , after the operator picks up the syringe with the multi-channel needle device disclosed in the present application, the outer needle tube 3 and the inner needle tube 4 are simultaneously inserted into the vial, and the distal end of the inner needle tube 4 is inserted to the bottom of the vial;

[0055] Please refer to Figure 6, tilt the vial so that the microspheres gather at the distal end of the inner syringe needle 4. During the tilting process, pay attention that the preservation liquid does not touch the distal end of the outer syringe needle 3, and keep the space of the channel 10 communicating with the outside of the vial, that is, keep the air in the vial can communicate with the outside space of the vial through the channel 10, so as to balance the pressure inside and outside the vial;

[0056] During the aspiration process, aspiration can be repeated until all the microspheres in the vial are transferred into the syringe;

[0057] Please refer to Figure 7 , invert the aspirated syringe and let it stand still so that the microspheres settle to the bottom of the syringe;

[0058] Please refer to Figure 8 , keep the inverted state and push the syringe again to push the preservation liquid in the syringe into the vial to complete the separation of the microspheres from the preservation liquid, and note that the height of the preservation liquid in the vial cannot exceed the height of the distal end of the outer syringe needle 3.

[0059] This application also discloses another multi-channel needle device, which is different from the multi-channel needle device described in the above content. Please refer to Figure 9 , the outer syringe needle 3 is located outside the inner syringe needle 4, and the channel 10 is located inside the outer syringe needle 3.

[0060] The length of the part of the inner syringe needle 4 outside the base 1 is greater than the length of the part of the outer syringe needle 3 outside the base 1. In some possible implementation manners, the difference between the length of the part of the inner syringe needle 4 outside the base 1 and the length of the part of the inner syringe needle 3 outside the base 1 is greater than 1 mm.

[0061] In some possible implementation manners, the number of the outer syringe needles 3 is at least one.

[0062] In some possible implementation manners, the number of the outer syringe needles 3 is multiple, for example, 4, and they are evenly distributed on the outer wall of the inner syringe needle 4.

[0063] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A multi-channel needle device, characterized in that: include: A base (1), an inner needle tube (4) and an outer needle tube (3); A first channel (2) passes through the base (1) and is connected to the inner needle tube (4); a first step (21) and a second step (22) are provided on the inner wall of the first channel (2); The proximal end of the outer needle tube (3) is inserted into the base (1) and abuts against the second step (22); The proximal end of the inner needle tube (4) is inserted into the base (1) and abuts against the first step (21); the inner needle tube (4) is sleeved inside the outer needle tube (3), and a channel (10) exists between the outer wall of the inner needle tube (4) and the inner wall of the outer needle tube (3); A second channel (5) is provided on the base (1), and the second channel (5) is connected to the outer side surface of the base (1) and the channel (10); The total length of the inner needle tube (4) and the base (1) is greater than the total length of the outer needle tube (3) and the base (1).

2. The multi-channel needle device according to claim 1, characterized in that: The width of the channel (10) between the inner needle tube (4) and the outer needle tube (3) is uniform.

3. The multi-channel needle device according to claim 1, characterized in that: The width of the channel (10) between the inner needle tube (4) and the outer needle tube (3) is uneven.

4. The multi-channel needle device according to claim 1, characterized in that: A plurality of independent channels (10) are present between the outer wall of the inner needle tube (4) and the inner wall of the outer needle tube (3).

5. The multi-channel needle device according to any one of claims 1 to 4, characterized in that: The difference between the length of the portion of the outer needle tube (3) located outside the base (1) and the length of the portion of the inner needle tube (4) located outside the base (1) is greater than 1 mm.

6. A multi-channel needle device, characterized in that: include: A base (1), an inner needle tube (4) and an outer needle tube (3); A first channel (2) passes through the base (1) and is connected to the inner needle tube (4), and a step is provided on the inner wall of the first channel (2); The proximal end of the inner needle tube (4) is inserted into the base (1) and abuts against the step (21); The outer needle tube (3) has a channel (10); A second channel (5) is provided on the base (1), and the second channel (5) is connected to the outer side surface of the base (1) and the channel (10); The total length of the inner needle tube (4) and the base (1) is greater than the total length of the outer needle tube (3) and the base (1).

7. The multi-channel needle device according to claim 6, characterized in that: The difference between the length of the portion of the inner needle tube (4) located outside the base (1) and the length of the portion of the outer needle tube (3) located outside the base (1) is greater than 1 mm.

8. The multi-channel needle device according to claim 6 or 7, characterized in that: The number of channels (10) is plural.

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