A syringe for intrathecal injection

Abstract

This utility model relates to a medical device, disclosing a syringe for intrathecal injection, which includes a syringe barrel, a switching element, and a piston. The syringe barrel has at least two spaced-apart storage channels, allowing the syringe to simultaneously store at least two medications. The medication in one of the storage channels is pushed sequentially through a rotating groove, a second opening, an infusion channel, and a first opening to a connector under the action of the piston, and then injected into the patient through a lumbar puncture needle connected to the connector. When another medication is to be injected, the switching element is rotated to connect the second opening with the storage channel containing the other medication, pushing the piston to expel and inject the other medication. Thus, the syringe enables the storage and injection of at least two medications. Compared to syringes that can only store a single medication, this syringe only needs to be connected to the lumbar puncture needle once to complete the injection of at least two medications, improving work efficiency and reducing the possibility of lumbar puncture needle displacement.

Description

Technical Field

[0001] This utility model relates to a medical device, and more particularly to a syringe for intrathecal injection. Background Technology

[0002] Intrathecal injection is a method of injecting drugs directly into the subarachnoid space of the spinal cord to achieve therapeutic or diagnostic purposes. This method can be used to treat pain, infections, tumors, and certain neurological disorders.

[0003] When using intrathecal injection to treat diseases, two or more drugs are usually involved, and to ensure that the drug solution takes effect properly after being injected into the body, the different drugs are usually not mixed before injection.

[0004] Currently used syringes can only hold a single type of medication. Therefore, during intrathecal injection, two or more prepared medications are usually transferred to different syringes. After a successful lumbar puncture, the syringe is connected to the end of the lumbar puncture needle, and the medication is injected into the spinal canal. Because two or more medications need to be injected, the process of connecting the syringe to the end of the lumbar puncture needle must be repeated to inject different medications into the patient. This makes the injection process inefficient, and the connection process is cumbersome and prone to needle displacement, causing unnecessary pain to the patient. Utility Model Content

[0005] The purpose of this invention is to provide a syringe for intrathecal injection, which solves the problems of low injection efficiency and easy displacement of the lumbar puncture needle during syringe replacement caused by the existing syringes being able to hold only a single type of drug solution.

[0006] To achieve the above objectives, this utility model provides a syringe for intrathecal injection, which includes a syringe barrel, a switching component, and a piston assembly;

[0007] The syringe has at least two spaced liquid storage channels, the front end of the syringe has a rotating groove, the rear end of the liquid storage channel passes through the rear end of the syringe, and the front end of the liquid storage channel communicates with the rotating groove.

[0008] The number of piston assemblies is the same as the number of liquid storage channels, and each liquid storage channel is equipped with a piston assembly.

[0009] The switching component is rotatably connected to the rotating groove, and the front end of the switching component is provided with a connector; the switching component has an infusion channel, both ends of which pass through the switching component, and the outer surface of the switching component has a first opening and a second opening, the first opening communicating with the connector and the second opening communicating with the rotating groove;

[0010] The switching element can rotate to different positions in the rotating groove, thereby connecting the second opening with different liquid storage channels.

[0011] Furthermore, the switching element is spherical, and the shape of the rotating groove matches that of the switching element;

[0012] The portion of the switching member embedded in the rotating groove is defined as the embedding part, and the portion of the switching member not embedded in the rotating groove is defined as the moving part;

[0013] The volume of the embedded part is greater than the volume of the moving part.

[0014] Furthermore, the syringe includes a syringe body and a cap ring connected sequentially from back to front;

[0015] The syringe body has a syringe groove at its front end; the liquid storage channel is located at the rear end of the syringe body and is connected to the syringe groove.

[0016] The cover ring has an embedding channel that extends through both ends of the cover ring and is connected to the syringe groove, together forming the rotating groove.

[0017] Furthermore, the syringe body includes a cylindrical body and a septum;

[0018] The cylinder is hollow with openings at both ends, and the partition extends along the axial direction of the cylinder.

[0019] The plurality of partitions are evenly spaced on one side in the radial direction and fixed to the inner wall of the cylinder, and the plurality of partitions are connected to each other on the other side in the radial direction to divide the internal space of the cylinder into at least two liquid storage channels.

[0020] Furthermore, the cylinder includes a liquid storage section and a liquid exchange section connected sequentially from back to front;

[0021] The diameter of the fluid exchange section gradually decreases from back to front;

[0022] The front end face of the septum is a concave arc surface, and the front end faces of multiple septums and the inner wall surface of the fluid exchange section together define the syringe groove.

[0023] Furthermore, a pair of gripping parts are provided extending outward from the rear opening edge of the syringe body, and the pair of gripping parts are symmetrical about the syringe body.

[0024] Furthermore, a movable handle is fixedly provided on the outer surface of the movable part;

[0025] The movable handle extends from the first opening toward the second opening, such that the end of the movable handle away from the first opening is attached to the edge of the rotating groove.

[0026] Furthermore, the piston assembly includes a liquid-pushing part and a connecting part connected sequentially from front to back;

[0027] The outer peripheral wall of the liquid pushing part is sealed to the inner peripheral wall of the liquid storage channel, and the front end face of the liquid pushing part is provided with a clearance groove, the shape of which matches the switching component.

[0028] There is a gap between the outer peripheral wall of the connecting part and the inner peripheral wall of the liquid storage channel.

[0029] Furthermore, a handle is provided extending outward from the rear outer periphery of the connecting part.

[0030] Compared with the prior art, the syringe for intrathecal injection provided by this utility model has the following advantages:

[0031] This invention provides a syringe for intrathecal injection, comprising a syringe barrel, a switching component, and a piston. The syringe barrel has at least two spaced-apart reservoirs, allowing the syringe to simultaneously store at least two different medications. The medication in one reservoir is pushed sequentially through a rotating groove, a second opening, an infusion channel, and a first opening to a connector under the action of the piston assembly. The connector communicates with a lumbar puncture needle, allowing the medication to enter the needle and be injected into the patient. When another medication is to be injected, the switching component is rotated to connect the second opening with the reservoir corresponding to the other medication, pushing the piston assembly to expel and inject the other medication. Thus, the syringe enables the temporary storage and injection of at least two medications. Compared to syringes that can only store a single medication, this syringe only requires connecting the connector to the lumbar puncture needle once to complete the injection of at least two medications, improving efficiency and reducing the possibility of needle displacement. Attached Figure Description

[0032] Figure 1 This is a front view schematic diagram of a syringe for intrathecal injection according to an embodiment of the present invention;

[0033] Figure 2 yes Figure 1 A schematic diagram of the AA cross-section;

[0034] Figure 3 yes Figure 2 Enlarged view of region A in the middle;

[0035] Figure 4 This is a front view schematic diagram of the syringe barrel in an intrathecal injection according to an embodiment of the present utility model;

[0036] Figure 5 yes Figure 4 BB cross-sectional diagram;

[0037] Figure 6 This is a front view schematic diagram of the syringe body in an intrathecal injection according to an embodiment of the present invention;

[0038] Figure 7 yes Figure 6 A schematic diagram of the CC cross-section;

[0039] Figure 8 This is a front view schematic diagram of the piston in a syringe for intrathecal injection according to an embodiment of the present invention;

[0040] Figure 9 This is an explosion diagram of a syringe for intrathecal injection according to an embodiment of the present invention;

[0041] Figure 10 This is a cross-sectional schematic diagram of a switching component in a syringe for intrathecal injection according to an embodiment of the present invention.

[0042] In the figure, 100 is a syringe for intrathecal injection; 1 is a syringe barrel; 10 is a liquid storage channel; 101 is a rotating groove; 11 is the syringe barrel body; 110 is a syringe barrel groove; 111 is the barrel body; 1111 is the liquid storage section; 1112 is the liquid changing section; 112 is a diaphragm; 113 is a grip; 12 is a cap ring; 120 is an embedding channel; 2 is a switching component; 20 is an infusion channel; 201 is the first opening; 202 is the second opening; 21 is a connector; 22 is an embedding section; 23 is a moving section; 24 is a moving handle; 3 is a piston; 31 is a dispensing section; 310 is a clearance groove; 32 is a connecting section; and 33 is a carrying handle. Detailed Implementation

[0043] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0044] like Figures 1-10 As shown, an embodiment of the present invention provides a syringe 100 for intrathecal injection, which includes a syringe barrel 1, a switching component 2, and a piston assembly 3.

[0045] The syringe 1 has at least two spaced liquid storage channels 10, the front end of the syringe 1 has a rotating groove 101, the rear end of the liquid storage channel 10 passes through the rear end of the syringe 1, and the front end of the liquid storage channel 10 is connected to the rotating groove 101.

[0046] The number of piston assemblies 3 is the same as the number of liquid storage channels 10, and each of the liquid storage channels 10 is provided with a piston assembly 3.

[0047] The switching component 2 is rotatably connected to the rotating groove 101, and the front end of the switching component 2 is provided with a connector 21; the switching component 2 has an infusion channel 20, both ends of the infusion channel 20 penetrate the switching component 2, and the outer surface of the switching component 2 has a first opening 201 and a second opening 202, the first opening 201 is connected to the connector 21, and the second opening 202 is connected to the rotating groove 101;

[0048] The switching element can rotate to different positions in the rotating groove, thereby connecting the second opening with different liquid storage channels.

[0049] Based on the above technical solution, the syringe 1 has at least two spaced-apart liquid storage channels 10, so that the syringe 100 can store at least two kinds of medications simultaneously; the medication in one of the liquid storage channels 10 is pushed sequentially through the rotating groove 101, the second opening 202, the infusion channel 20, and the first opening 201 to the connector 21 under the pushing action of the piston assembly 3. The connector 21 is used to communicate with the lumbar puncture needle, so that the medication can enter the lumbar puncture needle through the connector 21 and then be injected into the patient's body; when When another medication needs to be injected, the switching component 2 is rotated so that the second opening 202 is connected to the storage channel 10 corresponding to the other medication, and the piston assembly 3 is pushed to push out the other medication for injection. Thus, the syringe 100 can achieve temporary storage and injection of at least two medications. Compared with a syringe that can only store a single medication, the syringe 100 only needs to connect the connector 21 to the lumbar puncture needle once to complete the injection of at least two medications, thereby improving work efficiency and reducing the possibility of lumbar puncture needle displacement.

[0050] Furthermore, such as Figures 1-3As shown, the switching element 2 is spherical, and the shape of the rotating groove 101 matches that of the switching element 2. The portion of the switching element 2 embedded in the rotating groove 101 is defined as the embedding part 22, and the portion of the switching element 2 not embedded in the rotating groove 101 is defined as the moving part 23. The volume of the embedding part 22 is larger than that of the moving part 23, so that the rotating groove 101 covers at least half of the switching element 2 to prevent the switching element 2 from coming out of the rotating groove 101 during use and rotation.

[0051] Furthermore, such as Figures 1-5 As shown, the syringe 1 includes a syringe body 11 and a cap ring 12 connected sequentially from back to front; a syringe groove 110 is provided at the front end of the syringe body 11; a liquid storage channel 10 is provided at the rear end of the syringe body 11, and the liquid storage channel 10 communicates with the syringe groove 110; an embedding channel 120 is provided in the cap ring 12, the embedding channel 120 passes through both the front and rear ends of the cap ring 12, and the embedding channel 120 and the syringe groove 110 communicate and jointly define the rotating groove 101; so that the shape of the rotating groove 101 matches the switching member 2; since the volume of the embedding part 22 is larger than the volume of the moving part 23, the shape of the inner wall of the rotating groove 101 will be larger than a hemisphere. In order to reduce the difficulty of production and processing, the rotating groove 101 is processed by splitting it into two parts: the syringe groove 110 of the syringe body 11 and the embedding channel 120 of the cap ring 12.

[0052] Furthermore, such as Figures 2-7 As shown, to specifically realize the opening of the liquid storage channel 10, the syringe body 11 includes a cylindrical body 111 and partitions 112; the cylindrical body 111 is hollow with openings at both ends, and a plurality of partitions 112 extend along the axial direction of the cylindrical body 111; one radially spaced side of the plurality of partitions 112 is evenly fixed to the inner wall of the cylindrical body 111, and the other radially connected side of the plurality of partitions 112 are interconnected to divide the internal space of the cylindrical body 111 into at least two liquid storage channels 10. The number of partitions 112 can be increased or decreased to change the number of liquid storage channels 10 formed by the division.

[0053] Preferably, the syringe 1 in this embodiment includes three partitions 112 to divide the three liquid storage channels 10 at intervals.

[0054] Furthermore, such as Figure 6 and Figure 7As shown, the cylindrical body 111 includes a liquid storage section 1111 and a liquid exchange section 1112 connected sequentially from back to front; the diameter of the liquid exchange section 1112 gradually decreases from back to front; the front end face of the partition 112 is an inwardly concave arc surface, and the front end faces of multiple partitions 112 and the inner wall surface of the liquid exchange section 1112 together define the syringe groove 110. By gradually decreasing the diameter of the liquid exchange section 1112 from back to front, the size of the front end of the cylindrical body 111 is gradually reduced, and the front end face of the partition 112 is an inwardly concave arc surface to avoid the switching member 2, and to be able to form the syringe groove 110 together with the inner wall of the liquid exchange section 1112.

[0055] Furthermore, such as Figure 6 and Figure 7 As shown, a pair of gripping parts 113 are provided on the outward extension of the rear opening edge of the syringe body 11, and the pair of gripping parts 113 are symmetrical about the syringe body 11. The gripping parts 113 are used to enable medical personnel to hold the syringe body 11 stably during injection.

[0056] Furthermore, such as Figure 10 As shown, a movable handle 24 is fixedly provided on the outer surface of the movable part 23; the movable handle 24 extends from the first opening 201 toward the second opening 202; the movable handle 24 on the outer surface of the movable part 23 marks the location of the infusion channel 20, and can be adjusted to the reservoir channel 10 corresponding to the drug to be injected, so that the corresponding reservoir channel 10 communicates with the infusion channel 20, so that the corresponding drug is pushed out for injection. The end of the movable handle 24 away from the first opening 201 is fitted against the edge of the groove 101 to prevent the switching member 2 from rotating freely in the rotating groove 101 and damaging the connector 21.

[0057] Furthermore, such as Figure 8 As shown, the piston assembly 3 includes a liquid-pushing part 31 and a connecting part 32 connected sequentially from front to back. The outer peripheral wall of the liquid-pushing part 31 is sealed to the inner peripheral wall of the liquid storage channel 10, and a clearance groove 311 is provided on the front end face of the liquid-pushing part 31. The shape of the clearance groove 311 matches that of the switching member 2. There is a gap between the outer peripheral wall of the connecting part 32 and the inner peripheral wall of the liquid storage channel 10. The liquid is pushed through the liquid-pushing part 31, which is located at the front end and seals to the inner peripheral wall of the liquid storage channel 10, and the clearance groove 311 on the front end face of the liquid-pushing part 31 avoids the switching member 2. The gap between the outer peripheral wall of the connecting part 32 and the inner peripheral wall of the liquid storage channel 10 facilitates the overall insertion of the piston assembly 3.

[0058] Furthermore, such as Figure 8 As shown, a handle 33 extends outward from the rear outer periphery of the connecting part 32; the handle 33 facilitates pulling the piston assembly 3 out of the liquid storage channel 10.

[0059] The working process of this utility model is as follows: three different medicinal liquids are moved into the three liquid storage channels 10 respectively, and three piston assemblies 3 are inserted into the corresponding liquid storage channels 10 respectively.

[0060] Connect the connector 21 to the lumbar puncture needle. Rotate the movable handle 24 to rotate the infusion channel 20 to the position of the reservoir channel 10 corresponding to the first type of drug to be injected. Push the corresponding piston assembly 3. Under the pushing action of the piston assembly 3, the first type of drug is pushed sequentially through the rotating groove 101, the second opening 202, the infusion channel 20 and the first opening 201 to the connector 21, and then injected into the patient's body through the lumbar puncture needle. Rotate the movable handle 24 to rotate the infusion channel 20 to the position of the reservoir channel 10 corresponding to the second type of drug to be injected. Push the corresponding piston assembly 3 to complete the injection of the second type of drug. Continue the above process to complete the injection of the third type of drug.

[0061] In summary, this utility model provides a syringe 100 for intrathecal injection, comprising a syringe barrel 1, a switching component 2, and a piston assembly 3. The syringe barrel 1 has at least two spaced-apart liquid storage channels 10, allowing the syringe 100 to simultaneously store at least two different medications. The medication in one of the liquid storage channels 10 is pushed sequentially through the rotating groove 101, the second opening 202, the infusion channel 20, and the first opening 201 by the piston assembly 3, and is then fed to a connector 21. The connector 21 communicates with a lumbar puncture needle, allowing the medication to pass through the connector 21. The needle is inserted into the lumbar puncture needle and then injected into the patient's body. When another medication is to be injected, the switching component 2 is rotated so that the second opening 202 is connected to the reservoir channel 10 corresponding to the other medication, and the piston assembly 3 is pushed to push out the other medication for injection. Thus, the syringe 100 can achieve temporary storage and injection of at least two medications. Compared with a syringe that can only store a single medication, the syringe 100 only needs to connect the connector 21 to the lumbar puncture needle once to complete the injection of at least two medications, thereby improving work efficiency and reducing the possibility of lumbar puncture needle displacement.

[0062] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A syringe for intrathecal injection, characterized in that, Includes syringe, switching mechanism, and piston assembly; The syringe has at least two spaced liquid storage channels, the front end of the syringe has a rotating groove, the rear end of the liquid storage channel passes through the rear end of the syringe, and the front end of the liquid storage channel communicates with the rotating groove. The number of piston assemblies is the same as the number of liquid storage channels, and each liquid storage channel is equipped with a piston assembly. The switching component is rotatably connected to the rotating groove, and the front end of the switching component is provided with a connector; the switching component has an infusion channel, both ends of which pass through the switching component, and the outer surface of the switching component has a first opening and a second opening, the first opening communicating with the connector and the second opening communicating with the rotating groove; The switching element can rotate to different positions in the rotating groove, thereby connecting the second opening with different liquid storage channels.

2. The syringe as described in claim 1, characterized in that, The switching element is spherical, and the shape of the rotating groove matches that of the switching element. The portion of the switching member embedded in the rotating groove is defined as the embedding part, and the portion of the switching member not embedded in the rotating groove is defined as the moving part; The volume of the embedded part is greater than the volume of the moving part.

3. The syringe as described in claim 2, characterized in that, The syringe includes a syringe body and a cap ring connected sequentially from back to front; The syringe body has a syringe groove at its front end; the liquid storage channel is located at the rear end of the syringe body and is connected to the syringe groove. The cover ring has an embedding channel that extends through both ends of the cover ring and is connected to the syringe groove, together forming the rotating groove.

4. The syringe as described in claim 3, characterized in that, The syringe body includes a cylindrical body and a septum; The cylinder is hollow with openings at both ends, and the partition extends along the axial direction of the cylinder. The plurality of partitions are evenly spaced on one side in the radial direction and fixed to the inner wall of the cylinder, and the plurality of partitions are connected to each other on the other side in the radial direction to divide the internal space of the cylinder into at least two liquid storage channels.

5. The syringe as described in claim 4, characterized in that, The cylinder includes a liquid storage section and a liquid exchange section connected sequentially from back to front; The diameter of the fluid exchange section gradually decreases from back to front; The front end face of the septum is a concave arc surface, and the front end faces of multiple septums and the inner wall surface of the fluid exchange section together define the syringe groove.

6. The syringe as described in claim 3, characterized in that, The syringe body has a pair of grips extending outward from the rear opening edge, and the pair of grips are symmetrical about the syringe body.

7. The syringe as claimed in claim 2, characterized in that, A movable handle is fixedly provided on the outer surface of the movable part; The movable handle extends from the first opening toward the second opening, such that the end of the movable handle away from the first opening is attached to the edge of the rotating groove.

8. The syringe as claimed in claim 1, characterized in that, The piston assembly includes a liquid-pushing part and a connecting part connected sequentially from front to back; The outer peripheral wall of the liquid pushing part is sealed to the inner peripheral wall of the liquid storage channel, and the front end face of the liquid pushing part is provided with a clearance groove, the shape of which matches the switching component. There is a gap between the outer peripheral wall of the connecting part and the inner peripheral wall of the liquid storage channel.

9. The syringe as claimed in claim 8, characterized in that, The rear end of the connecting part extends outward to form a handle.

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