Single-tube multi-cavity injector and injection method thereof

Abstract

The invention relates to the technical field of medical instruments, in particular to a single-tube multi-cavity injector and an injection method thereof.The single-tube multi-cavity injector comprises a single-tube injector body used for containing a first injection, the single-tube injector body is sleeved with an annular cavity used for containing a second injection, one end of the annular cavity is fixedly connected with a linkage ring, and the other end of the annular cavity is fixedly connected with a second injection. A first external thread sleeve is fixedly connected to one side of the linkage ring, a clamping ring is arranged on the inner wall of the linkage ring, and a rubber capsule body used for mixing liquid medicine is clamped in the clamping ring. The single-tube injector and the annular cavity are communicated with the rubber capsule through the first needle and the L-shaped guide needle respectively, and the rubber capsule is communicated with the second needle, so that injection in the single-tube injector and the annular cavity can be transferred and mixed in the rubber capsule before entering subcutaneous tissue of a patient from the second needle; and after the mixed injection enters the subcutaneous tissue of the patient from the second needle head, the deserved curative effect can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a single-tube multi-chamber syringe and an injection method thereof. Background Art

[0002] A syringe is a common medical device, which consists of a syringe with a small hole at the front end and a matching piston core rod. When the piston is pushed, the pressure in the syringe increases, forcing the liquid to flow out through the needle. Syringes can be classified according to different standards. For example, they can be divided into glass syringes and plastic syringes according to the material; they can be divided into reusable syringes and disposable syringes according to the way of use; there are also special types such as self-destructive syringes and safety syringes.

[0003] For example, the existing patent publication number CN113262360B provides a double-chamber syringe, including a syringe with an injection chamber, and a push rod slidingly matched in the injection chamber, the front end of the syringe has a nipple for mounting an injection needle, the push rod includes a piston shaft, one end of the piston shaft is integrally formed with a push handle, and the other end of the piston shaft is mounted with a rubber piston body, the syringe is provided with two parallel injection chambers, both injection chambers have liquid holes connected to the nipple, and the nipple has connecting channels corresponding to the two injection chambers, each injection chamber is equipped with a push rod, and the syringe is provided with a push rod locking mechanism that can lock the push rod at any position. It can realize the injection operation of different injection liquids on demand, and has the advantages of safe and reliable operation.

[0004] In the above scheme, two injection chambers are designed in parallel, and two different injection liquids can be sucked into the injection chambers respectively, so that the device can inject different injection liquids in the two injection chambers into the patient's subcutaneous tissue synchronously or separately through a needle with two channels inside. However, some injection liquids need to be injected into the patient's subcutaneous tissue after being fully mixed to exert the best therapeutic effect. The method of directly injecting injection liquids in different chambers into the patient's subcutaneous tissue in the above device does not have the mixing conditions, which may result in the injection liquid failing to exert its due therapeutic effect.

[0005] Therefore, in view of the above problems, a single-tube multi-chamber syringe and an injection method thereof are proposed. Summary of the invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a single-tube multi-chamber syringe and an injection method thereof, which can effectively solve the problem that the method of injecting injection liquids in different cavities of the syringe directly into the subcutaneous tissue of the patient in the prior art does not have mixing conditions.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The present invention provides a single-tube syringe for containing a first injection liquid, wherein an annular cavity for containing a second injection liquid is mounted on the outside of the single-tube syringe, a linkage ring is fixedly connected to one end of the annular cavity, a first external threaded sleeve is fixedly connected to one side of the linkage ring, a clamping ring is provided on the inner wall of the linkage ring, and a rubber capsule for mixing liquid medicine is clamped inside the clamping ring;

[0009] One end of the single-tube syringe is fixedly connected to an internal thread sleeve, the internal thread sleeve and the first external thread sleeve are threadedly connected to each other, one end of the single-tube syringe is connected to a first needle, the first needle slightly protrudes from the internal thread sleeve, and one end of the first needle can be inserted into the interior of the rubber capsule;

[0010] A second external threaded sleeve is fixedly connected to one end of the annular cavity, a needle sleeve is externally threadedly connected to the second external threaded sleeve, a second needle is fixedly connected to one end of the needle sleeve, one end of the second needle slightly protrudes from the opening end of the needle sleeve, and one end of the second needle can be inserted into the interior of the rubber capsule;

[0011] One end of the annular cavity is connected to an L-shaped guide needle, and one end of the L-shaped guide needle is connected to the rubber capsule;

[0012] Furthermore, a rotating sleeve is fixedly connected to the inside of the rubber bladder through a support rod, and the axis of the rotating sleeve is collinear with the axis of the first needle and the axis of the second needle.

[0013] Furthermore, a plurality of rotating blades are fixedly connected to the outer wall of the rotating sleeve, and the plurality of rotating blades are arranged at equal angles along the circumferential direction of the outer wall of the rotating sleeve, and a bend is provided at the end of the rotating blade close to the first needle.

[0014] Furthermore, a plurality of rubber pads are fixedly connected to the inner wall of the annular cavity via a circular ring, and the plurality of rubber pads are arranged at equal angles along the circumferential direction of the inner wall of the annular cavity, and the plurality of rubber pads are in contact with the outer wall of the single-tube syringe.

[0015] Furthermore, a push rod is slidably mounted on the inner wall of the single-tube syringe, one end of the push rod is fixedly connected to a rubber plug, and the rubber plug is slidably mounted between the inner walls of the single-tube syringe.

[0016] Furthermore, a first anti-backflow rubber plug is fixedly connected to the inner wall of the end of the L-shaped guide needle close to the rubber bladder.

[0017] Furthermore, the other end side wall of the annular cavity is connected to a syringe inlet, and the inner wall of the syringe inlet is fixedly connected to a second anti-backflow rubber plug.

[0018] A syringe injection method, the injection method adopts a single-tube multi-chamber syringe as described in any one of claims 1 to 7, characterized in that the method comprises the following steps; characterized in that:

[0019] S1: injecting the first injection liquid into the single-tube syringe, and inserting it into the annular cavity after exhausting the air, and screwing the internal thread sleeve and the first external thread sleeve together to realize the installation between the single-tube syringe and the annular cavity, and at this time, the first needle is inserted into the rubber capsule;

[0020] S2: After the second injection liquid is connected to the nozzle of the syringe through a pipeline, it is filled into the annular cavity and the rubber bladder under the action of an external pressurizing device, and the air in the annular cavity, the rubber bladder and the second needle is discharged, and then the pressure on the second injection liquid is stopped;

[0021] S3: Push the push rod to allow a certain amount of the first injection liquid to enter the rubber bladder to control the ratio of the mixed liquid in the rubber bladder;

[0022] S4: insert the second needle obliquely at a certain angle and slowly push it forward until it penetrates the skin, then simultaneously push the push rod and start the second injection liquid external pressurizing device to inject the liquid;

[0023] S5: After the drug is injected, quickly pull out the needle and the tube outside the syringe inlet, and gently press the injection site with a cotton swab or gauze.

[0024] Beneficial Effects

[0025] Compared with the known prior art, the technical solution provided by the present invention has the following beneficial effects:

[0026] 1. The single-tube syringe and the annular cavity are connected to the rubber capsule through the first needle and the L-shaped guide needle respectively, and the rubber capsule is connected to the second needle, so that the injection liquid in the single-tube syringe and the annular cavity can be transferred and mixed in the rubber capsule before entering the subcutaneous tissue of the patient through the second needle, and the mixed injection liquid can play its due therapeutic effect after entering the subcutaneous tissue of the patient through the second needle;

[0027] Second, the fluid entering the rubber bladder through the first needle and the L-shaped guide needle can exert a certain rotational force on the rotating blades outside the rotating sleeve, and the rotating rotating sleeve and the rotating blades can improve the mixing effect of the injection liquid in the rubber bladder. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 is a schematic diagram of the present invention;

[0030] Figure 2 It is a side sectional schematic diagram of the present invention;

[0031] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged portion A;

[0032] Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged portion B;

[0033] Figure 5 It is a partial cross-sectional schematic diagram of the annular cavity of the present invention;

[0034] Figure 6 It is a partial cross-sectional schematic diagram of a single-tube syringe of the present invention;

[0035] Figure 7 It is a schematic diagram of the cooperation between the single-tube syringe and the rubber bladder of the present invention;

[0036] Figure 8 It is a cross-sectional schematic diagram of the annular cavity of the present invention;

[0037] Fig. 9 This is a schematic diagram of the cooperation between the needle cover and the rubber capsule of the present invention;

[0038] Fig.10 It is a schematic diagram of the internal structure of the rubber bladder of the present invention.

[0039] Reference numerals:

[0040] 1. Single-tube syringe; 2. Annular cavity; 21. Linkage ring; 22. First external threaded sleeve; 23. Clamping ring; 3. Rubber capsule; 11. Internal threaded sleeve; 12. First needle; 24. Second external threaded sleeve; 4. Needle sleeve; 41. Second needle; 25. L-shaped guide needle; 31. Rotating sleeve; 32. Rotating blade; 26. Rubber pad; 13. Push rod; 14. Rubber plug; 27. First anti-backflow rubber plug; 28. Syringe inlet; 29. ​​Second anti-backflow rubber plug. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The present invention will be further described below in conjunction with the embodiments.

[0043] See also Figure 1 - Fig.10 A single-tube multi-chamber syringe and an injection method thereof, comprising a single-tube syringe 1 for containing a first injection liquid, an annular cavity 2 for containing a second injection liquid is mounted on the outside of the single-tube syringe 1, a linkage ring 21 is fixedly connected to one end of the annular cavity 2, a first external threaded sleeve 22 is fixedly connected to one side of the linkage ring 21, a clamping ring 23 is provided on the inner wall of the linkage ring 21, and a rubber capsule 3 for mixing liquid medicine is clamped inside the clamping ring 23;

[0044] Among them, one end of the single-tube syringe 1 is fixedly connected with an internal thread sleeve 11, and the internal thread sleeve 11 and the first external thread sleeve 22 are threadedly connected to each other. One end of the single-tube syringe 1 is connected with a first needle 12, and the first needle 12 slightly protrudes from the internal thread sleeve 11. One end of the first needle 12 can be inserted into the interior of the rubber capsule 3;

[0045] One end of the annular cavity 2 is fixedly connected with a second external threaded sleeve 24, and a needle sleeve 4 is externally threadedly connected to the second external threaded sleeve 24. One end of the needle sleeve 4 is fixedly connected with a second needle 41, and one end of the second needle 41 slightly protrudes from the opening end of the needle sleeve 4. One end of the second needle 41 can be inserted into the interior of the rubber capsule 3.

[0046] One end of the annular cavity 2 is connected to an L-shaped guide needle 25, and one end of the L-shaped guide needle 25 is connected to the rubber capsule 3;

[0047] After the single-tube syringe 1 accommodates the first injection liquid through its cavity, the single-tube syringe 1 is controlled to be inserted into the interior of the annular cavity 2. When the internal threaded sleeve 11 and the first external threaded sleeve 22 are screwed to the limit, the internal threaded sleeve 11 contacts the linkage ring 21. At this time, one end of the first needle 12 is inserted into the interior of the rubber capsule 3. At this time, the injection liquid in the single-tube syringe 1 can be squeezed into the rubber capsule 3 under the action of positive pressure. The annular cavity 2 accommodates the second injection liquid through its inner cavity, and the annular cavity 2 is connected to the rubber capsule 3 clamped in the clamping ring 23 through the L-shaped guide needle 25, so that the injection liquid in the annular cavity 2 can be squeezed into the rubber capsule 3 under the action of positive pressure. The needle sleeve 4 is screwed on the outside of the annular cavity 2 by the second external threaded sleeve 24. At this time, one end of the second needle 41 is inserted into the rubber capsule 3, and the injection liquid squeezed into the rubber capsule 3 enters the patient's subcutaneous tissue through the second needle 41 under the continuous positive pressure.

[0048] like Figure 7 , Fig. 9 and Fig.10 As shown, a rotating sleeve 31 is fixedly connected to the inside of the rubber capsule 3 through a support rod, and the axis of the rotating sleeve 31 is collinear with the axis of the first needle 12 and the second needle 41 respectively. A plurality of rotating blades 32 are fixedly connected to the outer wall of the rotating sleeve 31, and the plurality of rotating blades 32 are arranged at equal angles along the circumferential direction of the outer wall of the rotating sleeve 31. A bend is provided at the end of the rotating blade 32 close to the first needle 12. The two injection liquids entering the rubber capsule 3 respectively from the first needle 12 and the L-shaped guide needle 25 generate a certain rotational output force on the rotating blade 32 under the positive pressure. At this time, the rotating sleeve 31 and the rotating blade 32 rotate as a whole under the limitation of the bracket, thereby improving the mixing effect of the injection liquid mixed in the rubber capsule 3.

[0049] like Figure 5 and Figure 8 As shown, the inner wall of the annular cavity 2 is fixed with multiple rubber pads 26 through a circular ring. The multiple rubber pads 26 are arranged at equal angles along the circumferential direction of the inner wall of the annular cavity 2. The multiple rubber pads 26 are all in contact with the outer wall of the single-tube syringe 1. After the single-tube syringe 1 and the annular cavity 2 are interlaced with each other, the rubber pads 26 can increase the installation stability of the single-tube syringe 1 in the annular cavity 2 by serving as a filling structure for the gap between the outer wall of the single-tube syringe 1 and the inside of the annular cavity 2.

[0050] like Figure 6As shown, the inner wall of the single-tube syringe 1 is slidably sleeved with a push rod 13, one end of the push rod 13 is fixedly connected with a rubber plug 14, and the rubber plug 14 is slidably sleeved between the inner walls of the single-tube syringe 1. When the single-tube syringe 1 is not installed with the annular cavity 2, the single-tube syringe 1 is inserted into a container of a first injection liquid, and the push rod 13 is pulled out so that the negative pressure generated between the rubber plug 14 and the inner wall of the single-tube syringe 1 draws the injection liquid into the cavity of the single-tube syringe 1, and then the single-tube syringe 1 and the annular cavity 2 are installed relative to each other.

[0051] like Figure 2 , Figure 3 and Figure 4 As shown, a first anti-backflow rubber plug 27 is fixedly connected to the inner wall of the end of the L-shaped guide needle 25 close to the rubber bladder 3, and a syringe inlet 28 is connected to the side wall of the other end of the annular cavity 2. A second anti-backflow rubber plug 29 is fixedly connected to the inner wall of the syringe inlet 28. The second injection liquid container is connected to the L-shaped guide needle 25 through a pipeline, and the injection liquid is poured into the cavity of the annular cavity 2 under the action of an external pressurizing device until the annular cavity 2 and the cavities in the rubber bladder 3 are filled, and the first anti-backflow rubber plug 27 and the second anti-backflow rubber plug 29 can respectively prevent the injection liquid from flowing back and being discharged from the syringe inlet 28 or flowing back from the rubber bladder 3 to the cavity of the annular cavity 2.

[0052] A syringe injection method, the injection method using any one of the single-tube multi-chamber syringes in claims 1-7, characterized in that the method comprises the following steps; characterized in that:

[0053] S1: The first injection liquid is injected into the single-tube syringe 1, and after the air is exhausted, the single-tube syringe 1 is inserted into the annular cavity 2, and the internal threaded sleeve 11 and the first external threaded sleeve 22 are screwed together to realize the installation between the single-tube syringe 1 and the annular cavity 2. At this time, the first needle 12 is inserted into the rubber capsule 3;

[0054] S2: After the second injection liquid is connected to the syringe inlet 28 through a pipeline, it is filled into the annular cavity 2 and the rubber capsule 3 under the action of an external pressurizing device, and the air in the annular cavity 2, the rubber capsule 3 and the second needle 41 is discharged, and then the pressure on the second injection liquid is stopped;

[0055] S3: Pushing the push rod 13 allows a certain amount of the first injection liquid to enter the rubber capsule 3 to control the ratio of the mixed liquid in the rubber capsule 3;

[0056] S4: insert the second needle 41 obliquely at a certain angle, and slowly push it forward until it penetrates the skin, then simultaneously push the push rod 13 and start the second injection liquid external pressurizing device to achieve liquid injection;

[0057] S5: After the drug injection is completed, quickly pull out the needle, pull out the outer tube of the syringe inlet 28, and gently press the injection site with a cotton swab or gauze.

[0058] Working principle: After the single-tube syringe 1 accommodates the first injection liquid through its cavity, the single-tube syringe 1 is controlled to be inserted into the interior of the annular cavity 2. When the internal thread sleeve 11 and the first external thread sleeve 22 are screwed to the limit, the internal thread sleeve 11 contacts the linkage ring 21. At this time, one end of the first needle 12 is inserted into the interior of the rubber capsule 3. At this time, the injection liquid in the single-tube syringe 1 can be squeezed into the rubber capsule 3 under the action of positive pressure. The annular cavity 2 accommodates the second injection liquid through its inner cavity, and the annular cavity 2 is guided by the L-shaped needle. The second outer threaded sleeve 24 is screwed on the needle cover 4 outside the annular cavity 2. At this time, one end of the second needle 41 is inserted into the rubber sac 3. The injection liquid squeezed into the rubber sac 3 enters the subcutaneous tissue of the patient through the second needle 41 under the continuous positive pressure. The two injection liquids that enter the rubber sac 3 respectively through the first needle 12 and the L-shaped guide needle 25 are pressed into the subcutaneous tissue of the patient under the positive pressure. The rotating blade 32 is subjected to a certain rotational output force. At this time, the rotating sleeve 31 and the rotating blade 32 are rotated as a whole under the limitation of the bracket, thereby improving the mixing effect of the injection liquid mixed in the rubber capsule 3. After the single-tube syringe 1 and the annular cavity 2 are interlaced with each other, the rubber pad 26 can be used as a filling structure for the gap between the outer wall of the single-tube syringe 1 and the inside of the annular cavity 2. When the single-tube syringe 1 is not installed with the annular cavity 2, the single-tube syringe 1 is inserted into the container of the first injection liquid and the push rod 13 is pulled out to make the rubber stopper 14 and the inside of the single-tube syringe 1 The negative pressure generated between the walls draws the injection liquid into the cavity of the single-tube syringe 1, and then the single-tube syringe 1 and the annular cavity 2 are installed relative to each other. The second injection liquid container is connected to the L-shaped guide needle 25 through a pipeline, and the injection liquid is poured into the cavity of the annular cavity 2 under the action of an external pressurizing device until the annular cavity 2 and the cavity in the rubber capsule 3 are filled. The first anti-backflow rubber plug 27 and the second anti-backflow rubber plug 29 can respectively prevent the injection liquid from flowing back and being discharged from the syringe inlet 28 or flowing back from the rubber capsule 3 to the cavity of the annular cavity 2.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of the present invention.

Claims

1. A single-tube multi-chamber syringe, comprising a single-tube syringe (1) for containing a first injection solution, characterized in that: The single-tube syringe (1) is externally provided with an annular cavity (2) for containing a second injection liquid, one end of the annular cavity (2) is fixedly connected with a linkage ring (21), one side of the linkage ring (21) is fixedly connected with a first external threaded sleeve (22), the inner wall of the linkage ring (21) is provided with a clamping ring (23), and a rubber capsule (3) for mixing a liquid medicine is clamped inside the clamping ring (23); One end of the single-tube syringe (1) is fixedly connected to an internal threaded sleeve (11), the internal threaded sleeve (11) and the first external threaded sleeve (22) are threadedly connected to each other, one end of the single-tube syringe (1) is connected to a first needle (12), the first needle (12) slightly protrudes from the internal threaded sleeve (11), and one end of the first needle (12) can be inserted into the interior of the rubber capsule (3); One end of the annular cavity (2) is fixedly connected to a second externally threaded sleeve (24), the second externally threaded sleeve (24) is externally threadedly connected to a needle sleeve (4), one end of the needle sleeve (4) is fixedly connected to a second needle (41), one end of the second needle (41) slightly protrudes from the open end of the needle sleeve (4), and one end of the second needle (41) can be inserted into the interior of the rubber capsule (3); One end of the annular cavity (2) is connected to an L-shaped guide needle (25), and one end of the L-shaped guide needle (25) is connected to the rubber capsule (3).

2. A single-tube multi-chamber syringe according to claim 1, characterized in that: A rotating sleeve (31) is fixedly connected to the interior of the rubber sac (3) via a support rod, and the axis of the rotating sleeve (31) is collinear with the axis of the first needle (12) and the axis of the second needle (41).

3. A single-tube multi-chamber syringe according to claim 2, characterized in that: A plurality of rotating blades (32) are fixedly connected to the outer wall of the rotating sleeve (31), and the plurality of rotating blades (32) are arranged at equal angles along the circumferential direction of the outer wall of the rotating sleeve (31), and a bend is provided at the end of the rotating blade (32) close to the first needle (12).

4. A single-tube multi-chamber syringe according to claim 3, characterized in that: The inner wall of the annular cavity (2) is fixedly connected to a plurality of rubber pads (26) via a circular ring. The plurality of rubber pads (26) are arranged at equal angles along the circumferential direction of the inner wall of the annular cavity (2). The plurality of rubber pads (26) are in contact with the outer wall of the single-tube syringe (1).

5. A single-tube multi-chamber syringe according to claim 4, characterized in that: A push rod (13) is slidably mounted on the inner wall of the single-tube syringe (1), one end of the push rod (13) is fixedly connected to a rubber stopper (14), and the rubber stopper (14) is slidably mounted on the inner wall of the single-tube syringe (1).

6. A single-tube multi-chamber syringe according to claim 5, characterized in that: A first anti-backflow rubber plug (27) is fixedly connected to the inner wall of the end of the L-shaped guide needle (25) close to the rubber bladder (3).

7. A single-tube multi-chamber syringe according to claim 6, characterized in that: The other end side wall of the annular cavity (2) is connected to a syringe inlet (28), and the inner wall of the syringe inlet (28) is fixedly connected to a second anti-backflow rubber plug (29).

8. A syringe injection method, the injection method using a single-tube multi-chamber syringe as claimed in any one of claims 1 to 7, characterized in that: The following steps are involved: S1: a first injection liquid is drawn into the single-tube syringe (1), and after the air is exhausted, the single-tube syringe (1) is inserted into the annular cavity (2), and the internal thread sleeve (11) and the first external thread sleeve (22) are screwed together to realize the installation between the single-tube syringe (1) and the annular cavity (2), and at this time, the first needle (12) is inserted into the rubber capsule (3); S2: After the second injection liquid is connected to the syringe inlet (28) through a pipeline, it is filled into the annular cavity (2) and the rubber capsule (3) under the action of an external pressurizing device, and the air in the annular cavity (2), the rubber capsule (3) and the second needle (41) is discharged, and then the pressure on the second injection liquid is stopped; S3: pushing the push rod (13) to allow a certain amount of the first injection liquid to enter the rubber capsule (3) to control the ratio of the mixed liquid in the rubber capsule (3); S4: inserting the second needle (41) obliquely at a certain angle, slowly advancing until penetrating the skin, and then synchronously pushing the push rod (13) and activating the second injection liquid external pressurizing device to achieve liquid injection; S5: After the drug injection is completed, the needle is quickly pulled out, and the outer tube of the syringe inlet (28) is pulled out, and the injection site is gently pressed with a cotton swab or gauze.

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