Syringe

Abstract

The utility model provides an injector, and relates to the technical field of medical instruments. The injector comprises a needle unit, a needle cylinder unit, a partition plate unit, a piston unit and an adjusting switch, the needle unit is connected with the needle cylinder unit, the partition plate unit is arranged in the needle unit and the needle cylinder unit in a penetrating mode and divides the internal space into a hollow pipe cavity and an injection substance cavity, the needle cylinder unit comprises a needle cylinder body, and the adjusting switch is arranged on the needle cylinder body. The adjusting switch can control the hollow pipe cavity to be closed or be communicated with the outside atmosphere, when the hollow pipe cavity is controlled to be closed, due to the existence of the partition plate unit, one side of the hollow pipe cavity is not communicated with one side of the injection substance cavity pre-filled with hyaluronic acid, and no hyaluronic acid exists in the space of the hollow pipe cavity. Once the needle head unit punctures a blood vessel, blood return can be inevitably seen on one side of the cavity of the hollow tube during pumpback, so that false pumpback negative caused by the fact that the needle head is blocked by sticky hyaluronic acid is effectively avoided, and the safety of injection operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a syringe. Background Art

[0002] The main physiological characteristics of facial aging include bone absorption, loss of collagen capacity, and reduction and displacement of fat. These changes cause local depressions or grooves on the face, such as the facial depressions commonly known as "tear troughs, nasolabial folds, Indian lines, and marionette lines". In addition, some people who seek beauty are born with insufficient fullness in areas such as the forehead, temples, and nasal bridge, which affects their appearance. For the above facial depressions, injection filling and surgical procedures are commonly used treatments. Compared with surgical procedures, injection filling has a faster recovery time, and the risks and prices are relatively low. It has become the most commonly used method to improve the above facial depressions and enhance facial beauty.

[0003] Hyaluronic acid (also known as hyaluronic acid) is a linear polysaccharide naturally present in human and animal tissues. It is an important component of the extracellular matrix of all adult animal tissues. It exists in tissues in the form of biopolymers, and its natural properties make it extremely biocompatible. On the other hand, due to the presence of hyaluronidase in the human body, natural uncross-linked hyaluronic acid will be degraded and removed from the body within a few days after being injected into the tissue, making it difficult to play a plastic filling role. Therefore, different cross-linking agents are used in the production process to cross-link hyaluronic acid molecules to different degrees. Under the same other parameters, the greater the degree of cross-linking, the higher the hardness of the hyaluronic acid, the more viscous, the stronger the support, and the more plastic effect it can have. In addition, since hyaluronidase has difficulty penetrating the hyaluronic acid gel network with a high degree of cross-linking, it helps to slow down degradation, so hyaluronic acid with a high degree of cross-linking has a better persistence in the skin. In summary, among hyaluronic acid products, hyaluronic acid with a high degree of cross-linking and high viscosity is the first choice for soft tissue injection filling.

[0004] When using the above-mentioned highly cross-linked hyaluronic acid to fill the face, it is mostly injected into deeper anatomical sites such as the periosteum. However, the face has dense blood vessels. Once the operator punctures the blood vessels and pushes the hyaluronic acid into the blood vessels, the viscous hyaluronic acid immediately embolizes the blood vessels. Since the corresponding organs or tissues immediately show ischemic changes after the blood supply is blocked, it is difficult for the operator to fully remedy it in time through multi-point injections of hyaluronidase. Therefore, it is easy to eventually develop neurological symptoms such as impaired consciousness and hemiplegia, cerebral hemorrhage, loss of vision, organ failure, and even death and other serious consequences.

[0005] At present, most hyaluronic acid for injection is prefilled, that is, after the syringe is filled with hyaluronic acid, it is packaged and sold together with different needles. The syringe is usually a spiral-mouth syringe, equipped with several sharp and blunt needles of different thicknesses and lengths. It is generally believed that the probability of a blunt needle puncturing a blood vessel is lower than that of a sharp needle. However, in actual operation, because the injection site is deeper and the resistance of the blunt needle to penetrate the tissue is higher, the operator often needs to force the blunt needle into the tissue. This process still has the risk of puncturing a blood vessel, and the highly cross-linked hyaluronic acid is viscous, so it is often difficult for the operator to push it gently, which also increases the possibility of pushing the hyaluronic acid into a ruptured blood vessel. Therefore, in actual work, for the sake of caution, the operator often draws back the needle after it penetrates the tissue to determine whether the blood vessel has been punctured. If no blood is seen after the withdrawal, it is considered that the blood vessel has not been punctured, and the injection is then performed.

[0006] The applicant has found that the prior art has at least the following technical problems: highly cross-linked hyaluronic acid has a thick texture. Even if the needle has punctured the blood vessel, the viscous hyaluronic acid still prevents the blood from being smoothly drawn out. This results in false negative results when the hyaluronic acid is injected, which further causes the operator to mistakenly believe that the needle has not punctured the blood vessel and start pushing the injection, which cannot effectively avoid embolism. In fact, in addition to highly cross-linked hyaluronic acid, there are a large number of similar medical and cosmetic injections with strong viscosity that have the same problem. Utility Model Content

[0007] The purpose of the utility model is to provide a syringe to solve the technical problem that when injecting medical cosmetic injections with strong viscosity, even if the needle has punctured the blood vessel, the viscous injection still prevents the blood from being smoothly drawn out, and the back-drawing often results in a false negative result, resulting in serious consequences. The preferred technical solution among the many technical solutions provided by the utility model can produce many technical effects, which are described in detail below.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A syringe comprises a needle unit, a syringe unit, a partition unit, a piston unit and an adjustment switch, wherein the needle unit is connected to the syringe unit, the partition unit is arranged inside the needle unit and the syringe unit and separates the internal space into an empty tube cavity and an injection cavity, the syringe unit comprises a syringe body, the adjustment switch is arranged on the syringe body, the adjustment switch can control the empty tube cavity to be sealed or connected to the outside atmosphere, and the piston unit comprises a first piston and a second piston that move synchronously, the first piston can move relative to each other inside the empty tube cavity, and the second piston can move relative to each other inside the injection cavity.

[0010] Preferably, the piston unit also includes a first piston shaft, a second piston shaft and a piston handle, the two ends of the first piston shaft are respectively connected to the first piston and the piston handle, the two ends of the second piston shaft are respectively connected to the second piston and the piston handle, and pushing the piston handle can drive the first piston, the second piston, the first piston shaft and the second piston shaft to move synchronously.

[0011] Preferably, the first piston shaft and the second piston shaft have the same structure and are symmetrically arranged, and the first piston and the second piston have the same structure and are symmetrically arranged.

[0012] Preferably, the regulating switch includes a first connecting member and a second connecting member, the first connecting member is connected to the syringe body, the first connecting member is provided with a first vent connected to the outside atmosphere, the second connecting member is rotatably connected to the first connecting member, the second connecting member is provided with a second vent connected to the empty tube cavity, and rotating the second connecting member can adjust the relative position between the second vent and the first vent, when the second vent moves to the relative position of the first vent, a connection can be formed between the two to connect the empty tube cavity with the outside atmosphere, and when the second vent is not connected to the first vent, the empty tube cavity can be sealed.

[0013] Preferably, the first connecting member is a hollow tubular structure, and the first ventilation portion includes two ventilation holes, and the two ventilation holes are symmetrically opened on the tube wall of the first connecting member.

[0014] Preferably, the second connecting member is a cylindrical structure, the outer diameter of the second connecting member matches the inner diameter of the first connecting member, the second ventilation portion includes a three-way pipe, the three-way pipe is arranged inside the second connecting member, one end of the three-way pipe is connected to the empty tube cavity, and the other two ends of the three-way pipe can be connected to one of the ventilation holes when they are rotated to the corresponding positions of the two ventilation holes.

[0015] Preferably, the second connecting member is provided with a handle.

[0016] Preferably, the needle unit includes a needle tip and a needle stem, and the syringe unit also includes a needle plug, and the needle tip, the needle stem, the needle plug and the syringe body are connected in sequence.

[0017] Preferably, the needle tip, the needle stem, the needle plug and the syringe body are integrally connected.

[0018] Preferably, the partition unit comprises a partition body, and the partition body is an integrated structure.

[0019] The beneficial effects of the utility model are as follows: the regulating switch can control the empty tube cavity to form a seal or control the empty tube cavity to be connected to the outside atmosphere. When the empty tube cavity is controlled to form a seal, due to the presence of the partition unit, one side of the empty tube cavity and the side of the injection cavity pre-filled with hyaluronic acid are not connected to each other, and there is no hyaluronic acid in the space of the empty tube cavity. Once the needle unit punctures the blood vessel, blood return will inevitably be seen on one side of the empty tube cavity during backdrawing. The operator can observe and make full confirmation in real time, thereby stopping the push injection, reducing vascular embolism caused by blind push injection due to poor backdrawing, and effectively avoiding false negative backdrawing caused by viscous hyaluronic acid blocking the needle, thereby improving the safety of the injection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is a combined structural diagram of the needle unit, syringe unit and partition unit of the utility model;

[0022] Figure 2 This is a structural diagram of the piston unit of the utility model;

[0023] Figure 3 This is a structural diagram of the first connecting member of the regulating switch of the utility model;

[0024] Figure 4 This is a structural diagram of the second connecting member of the regulating switch of the utility model;

[0025] In the figure, 1 is a needle unit; 11 is a needle tip; 12 is a needle stem;

[0026] 2. Syringe unit; 21. Syringe body; 22. Needle plug;

[0027] 3. Partition unit;

[0028] 4. Piston unit; 41. First piston; 42. Second piston; 43. First piston shaft; 44. Second piston shaft; 45. Piston handle;

[0029] 5. Adjustment switch; 51. First connecting member; 511. First ventilating portion; 52. Second connecting member; 521. Second ventilating portion; 522. Handle;

[0030] 6. Empty tube cavity;

[0031] 7. Injection cavity. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0033] In the description of the present invention, it should be understood that the terms "center", "lateral", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate positions or location relationships based on the attached Figure 1 The orientation or positional relationship shown is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0035] Reference Figure 1 and Figure 4 The utility model provides a syringe, comprising a needle unit 1, a syringe unit 2, a partition unit 3, a piston unit 4 and an adjustment switch 5.

[0036] The needle unit 1 is connected to the syringe unit 2. In this embodiment, the connection method of the needle unit 1 and the syringe unit 2 is not specifically limited. A detachable connection method or an integrated connection method can be selected.

[0037] The needle unit 1 preferably includes a needle tip 11 and a needle stem 12, and the syringe unit 2 preferably includes a syringe body 21 and a needle plug 22, and the needle tip 11, the needle stem 12, the needle plug 22 and the syringe body 21 are connected in sequence;

[0038] In order to make the needle unit 1 and the syringe unit 2 form a better whole, an integrated connection can be selected between the needle unit 1 and the syringe unit 2, so that the needle tip 11, the needle stem 12, the needle plug 22 and the syringe body 21 are sequentially connected to form an integrated connection;

[0039] If the needle unit 1 and the syringe unit 2 are detachably connected, an additional guide structure is required to form a guide positioning between the needle unit 1 and the syringe unit 2, so as to avoid that the partition unit 3 on the needle unit 1 and the syringe unit 2 is not completely aligned.

[0040] The partition unit 3 is arranged to penetrate the inside of the needle unit 1 and the syringe unit 2, so as to separate the internal space of the needle unit 1 and the syringe unit 2 into two parts, one of which is an empty tube cavity 6, and the other is an injection cavity 7. The injection cavity 7 is used to accommodate pre-filled injections, such as hyaluronic acid. Due to the existence of the partition unit 3, one side of the empty tube cavity 6 is not connected to the other side of the injection cavity 7.

[0041] If the needle unit 1 and the syringe unit 2 are detachably connected, the partition unit 3 also needs to be divided into two parts, which are used to separate the needle unit 1 and the syringe unit 2 respectively;

[0042] If the needle unit 1 and the syringe unit 2 are connected in an integrated manner, the partition unit 3 is preferably also an integrated structure.

[0043] The regulating switch 5 is arranged on the syringe body 21 , and the regulating switch 5 can control the hollow tube cavity 6 to be airtight, or control the hollow tube cavity 6 to be connected with the outside atmosphere.

[0044] The piston unit 4 includes a first piston 41 and a second piston 42 that move synchronously. The first piston 41 can move relative to each other inside the hollow tube cavity 6, and the second piston 42 can move relative to each other inside the injection cavity 7. The first piston 41 and the second piston 42 are respectively arranged and move synchronously to form respective correspondences with the hollow tube cavity 6 and the injection cavity 7, and can synchronously push forward or withdraw the hollow tube cavity 6 and the injection cavity 7 under the action of external force.

[0045] Taking hyaluronic acid as an example, when the syringe is used, the operator takes out the syringe pre-filled with hyaluronic acid from the package, and the hyaluronic acid fills the injection cavity 7 of the syringe. After the operator inserts the needle unit 1 into the tissue to reach the expected position, the needle can be withdrawn without moving the needle position, and the empty tube cavity 6 is controlled to form a closed state by adjusting the adjustment switch 5;

[0046] Since the empty tube cavity 6 of the syringe is a closed space at this time, and due to the presence of the partition unit 3, one side of the empty tube cavity 6 is not connected to the side of the injection cavity 7 pre-filled with hyaluronic acid, and there is no hyaluronic acid in the space of the empty tube cavity 6, once the needle unit 1 punctures the blood vessel, blood return will inevitably be seen on one side of the empty tube cavity 6 during withdrawal. The operator can immediately observe and make full confirmation, thereby stopping the push injection, reducing the vascular embolism caused by blind push injection due to poor withdrawal. Therefore, during withdrawal, false negative withdrawal caused by viscous hyaluronic acid blocking the needle can be effectively avoided, thereby improving the safety of the injection operation;

[0047] If blood return can be seen on one side of the empty tube cavity 6 during the withdrawal process, it means that the needle unit 1 has pierced the blood vessel. At this time, the hyaluronic acid injection should be stopped. If no blood return is seen on one side of the empty tube cavity 6 during the withdrawal process, it fully proves that the needle unit 1 has not pierced the blood vessel. At this time, the operator adjusts the adjustment switch 5 to control the empty tube cavity 6 to be connected to the outside atmosphere, and then the piston unit 4 can be pushed. As the piston unit 4 moves forward, the air on one side of the empty tube cavity 6 is discharged from the syringe through the adjustment switch 5, and the injection contained in one side of the injection cavity 7 can enter the tissue from the needle unit 1.

[0048] At the same time, in order to avoid waste, one syringe may be used for multiple injection points. Since the syringe mentioned in this embodiment is completely separated from the tip of the needle unit 1 to the tail end of the syringe unit 2 by the partition unit 3, it is ensured that hyaluronic acid will not enter one side of the empty tube cavity 6 during the whole process of use to block the needle and make it difficult to withdraw again. Therefore, when changing to the next injection site, the operator can still withdraw smoothly according to the above process.

[0049] As an optional embodiment, the piston unit 4 further includes a first piston shaft 43, a second piston shaft 44 and a piston handle 45, the two ends of the first piston shaft 43 are respectively connected to the first piston 41 and the piston handle 45, the two ends of the second piston shaft 44 are respectively connected to the second piston 42 and the piston handle 45, and pushing the piston handle 45 can drive the first piston 41, the second piston 42, the first piston shaft 43 and the second piston shaft 44 to move synchronously, thereby performing a forward push action or a retracting action;

[0050] In this embodiment, the first piston shaft 43 and the second piston shaft 44 are preferably of the same structure and are symmetrically arranged, and the first piston 41 and the second piston 42 are preferably of the same structure and are symmetrically arranged. Such an arrangement can facilitate rapid production and at the same time, the force is more uniform during pushing forward and pulling back.

[0051] As an optional embodiment, the regulating switch 5 includes a first connecting member 51 and a second connecting member 52, the first connecting member 51 is connected to the syringe body 21, and the first connecting member 51 is provided with a first vent 511 connected to the outside atmosphere, the second connecting member 52 is rotatably connected to the first connecting member 51, and the second connecting member 52 is provided with a second vent 521 connected to the hollow tube cavity 6;

[0052] Rotating the second connecting piece 52 can adjust the relative position between the second ventilation portion 521 and the first ventilation portion 511. When the second ventilation portion 521 moves to the relative position of the first ventilation portion 511, a connection can be formed between the second ventilation portion 521 and the first ventilation portion 511, so that the empty tube cavity 6 is connected to the outside atmosphere. When the second ventilation portion 521 is not connected to the first ventilation portion 511, the empty tube cavity 6 can be sealed.

[0053] The first connecting member 51 is a hollow tubular structure. The first ventilation portion 511 includes two ventilation holes, and the two ventilation holes are symmetrically opened on the tube wall of the first connecting member 51 .

[0054] The second connecting member 52 is a cylindrical structure, and the outer diameter of the second connecting member 52 matches the inner diameter of the first connecting member 51, so that the second connecting member 52 can form a relatively tight rotational connection with the first connecting member 51, and the second ventilation portion 521 includes a three-way pipe, which is arranged inside the second connecting member 52, and one end of the three-way pipe is connected to the empty tube cavity 6, and the other two ends of the three-way pipe can be connected to one ventilation hole respectively when they are rotated to the corresponding positions of the two ventilation holes, and the channel diameters at the other two ends of the three-way channel are preferably matched with the aperture of the ventilation hole.

[0055] As an optional implementation, a handle 522 is provided on the second connecting member 52. The handle 522 can be easily held by the operator, and the adjustment switch 5 can be actually adjusted by twisting the handle 522, which makes the operation more convenient and quick.

[0056] The above are only specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A syringe, characterized in that: The invention comprises a needle unit (1), a syringe unit (2), a partition unit (3), a piston unit (4) and an adjusting switch (5); the needle unit (1) is connected to the syringe unit (2); the partition unit (3) is arranged inside the needle unit (1) and the syringe unit (2) and separates the internal space into a hollow tube cavity (6) and an injection cavity (7); the syringe unit (2) comprises a syringe body (21); the adjusting switch (5) is arranged on the syringe body (21); the adjusting switch (5) can control the hollow tube cavity (6) to be sealed or connected to the outside atmosphere; the piston unit (4) comprises a first piston (41) and a second piston (42) which move synchronously; the first piston (41) can move relative to the hollow tube cavity (6); and the second piston (42) can move relative to the injection cavity (7).

2. The syringe according to claim 1, characterized in that The piston unit (4) further comprises a first piston shaft (43), a second piston shaft (44) and a piston handle (45); the two ends of the first piston shaft (43) are respectively connected to the first piston (41) and the piston handle (45); the two ends of the second piston shaft (44) are respectively connected to the second piston (42) and the piston handle (45); pushing the piston handle (45) can drive the first piston (41), the second piston (42), the first piston shaft (43) and the second piston shaft (44) to move synchronously.

3. The syringe according to claim 2, characterized in that The first piston shaft (43) and the second piston shaft (44) have the same structure and are symmetrically arranged, and the first piston (41) and the second piston (42) have the same structure and are symmetrically arranged.

4. The syringe according to claim 1, characterized in that The regulating switch (5) comprises a first connecting member (51) and a second connecting member (52), wherein the first connecting member (51) is connected to the syringe body (21), and a first vent (511) connected to the outside atmosphere is provided on the first connecting member (51), and the second connecting member (52) is rotatably connected to the first connecting member (51), and a second vent (521) connected to the hollow tube cavity (6) is provided on the second connecting member (52), and the relative position between the second vent (521) and the first vent (511) can be adjusted by rotating the second connecting member (52), and when the second vent (521) moves to the relative position of the first vent (511), the two can be connected to each other so that the hollow tube cavity (6) is connected to the outside atmosphere, and when the second vent (521) is not connected to the first vent (511), the hollow tube cavity (6) can be sealed.

5. The syringe according to claim 4, characterized in that The first connecting member (51) is a hollow tubular structure, and the first ventilation portion (511) comprises two ventilation holes, and the two ventilation holes are symmetrically arranged on the tube wall of the first connecting member (51).

6. The syringe according to claim 5, characterized in that The second connecting member (52) is a cylindrical structure, the outer diameter of the second connecting member (52) matches the inner diameter of the first connecting member (51), the second vent (521) comprises a three-way pipe, the three-way pipe is arranged inside the second connecting member (52), one end of the three-way pipe is connected to the hollow tube cavity (6), and the other two ends of the three-way pipe can be connected to one of the vents when they are rotated to the corresponding positions of the two vents.

7. The syringe according to claim 6, characterized in that The second connecting member (52) is provided with a handle (522).

8. The syringe according to claim 1, characterized in that The needle unit (1) comprises a needle tip (11) and a needle stem (12), and the syringe unit (2) further comprises a needle plug (22), wherein the needle tip (11), the needle stem (12), the needle plug (22) and the syringe body (21) are connected in sequence.

9. The syringe according to claim 8, characterized in that The needle tip (11), the needle stem (12), the needle plug (22) and the syringe body (21) are connected in one piece.

10. The syringe according to claim 9, characterized in that The partition unit (3) comprises a partition body, and the partition body is an integrated structure.

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