Anti-embolism double-channel injector

Abstract

The anti-embolism double-channel injector comprises a needle cylinder, a needle head, a piston and a puncture needle, a transverse partition plate is arranged in the needle cylinder, and the interior of the needle cylinder is divided into an upper injection cavity and a lower blood return cavity by the transverse partition plate; the needle is arranged at the tail end of the needle cylinder, the upper portion of the needle penetrates through the transverse partition plate, a longitudinal partition plate is arranged in the needle and divides the interior of the needle into an injection channel and a blood return channel, the injection channel is communicated with the injection cavity, and the blood return channel is communicated with the blood return cavity; the end surface of the tail end of the needle head is a plane; the piston is movably arranged at one end of the injection cavity; a needle body of the puncture needle penetrates through the piston and the injection channel, and a needle tip of the puncture needle extends out of a needle head; whether the needle is inserted into a blood vessel or not is judged by observing the blood return condition in the blood return cavity, so that complications caused by the fact that medicine is injected into the blood vessel are avoided; meanwhile, the tail end of the needle is arranged to be a plane, and the problem that medicine is injected into a non-target area due to the fact that an existing syringe needle punctures an inclined plane in a straddling mode is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical injection beauty, and particularly relates to an anti-embolism double-channel syringe. Background Art

[0002] A syringe is a medical device used to inject medicine into the patient's body.

[0003] The sharp needle tips of currently used syringes all have a puncture bevel. The sharp puncture bevel helps to pierce tissue components such as the skin and fascia. However, since the puncture bevel has a certain length (approximately 1-4mm), and the separating tissues between the target layers of cosmetic injections, such as the fascia layer, are usually very thin, after the needle tip with the puncture bevel reaches the layer, the injected product will be injected into the non-target area through the puncture bevel due to the length of the puncture bevel. At the same time, the puncture bevel may even scratch the blood vessels, causing the product to be squeezed into the blood vessels under pressure and cause vascular embolism.

[0004] Another situation involves the needle piercing a blood vessel directly. Because the needle channel is already filled with product, withdrawing the product becomes ineffective, and the doctor mistakenly assumes it is safe to proceed with the injection. In this case, a large amount of product is injected into the blood vessel, which can easily lead to a series of more serious complications, such as skin necrosis, blindness, cerebral infarction, and even death.

[0005] Therefore, there is an urgent need to develop a syringe that can determine whether the needle is inserted into a blood vessel to avoid complications caused by the injection of drugs into the blood vessels; and the syringe can complete the precise injection of drugs in the target layer and target area, avoiding the injection of drugs into non-target layers causing unsatisfactory treatment effects, and the accumulation / movement of drugs or products in non-target layers or areas causing disfigurement. Utility Model Content

[0006] In response to at least one of the problems in the above-mentioned prior art, the purpose of the present invention is to provide an anti-embolism dual-channel syringe, which is provided with an injection chamber and a blood return chamber. By observing the blood return in the blood return chamber, it is determined whether the needle is inserted into the blood vessel, thereby avoiding the occurrence of complications caused by the injection of drugs into the blood vessels; at the same time, the end of the needle is set to a plane, avoiding the problem of the existing syringe needle riding on the puncture bevel, which causes the drug to be injected into the non-target area.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] An anti-embolism dual-channel syringe, comprising:

[0009] A syringe having a transverse partition disposed therein, wherein the transverse partition divides the interior of the syringe into an upper injection chamber and a lower blood return chamber;

[0010] A needle is provided at the end of the syringe, the upper portion of the needle passes through the transverse partition, a longitudinal partition is provided inside the needle, the longitudinal partition divides the interior of the needle into an injection channel and a blood return channel, the injection channel is connected to the injection cavity, and the blood return channel is connected to the blood return cavity; the end surface of the needle end is a plane;

[0011] a piston movably disposed at one end of the injection chamber, the piston comprising a push rod and a piston head connected to each other, the piston head being in sliding and sealing contact with the inner wall of the syringe;

[0012] The puncture needle has a needle body that penetrates the piston and the injection channel, and a needle tip of the puncture needle extends out of the injection channel.

[0013] Preferably, an air bag is provided on the outer wall of the syringe, and the air bag is communicated with the blood return cavity.

[0014] Preferably, a valve for deflation is provided at the top of the airbag.

[0015] Preferably, an upper push plate and a lower push plate are provided at the top end of the push rod, two columns are provided between the upper push plate and the lower push plate, and a card slot is provided on the upper push plate.

[0016] Preferably, a screwing head is provided on the top of the puncture needle, and the screwing head is connected to the needle body of the puncture needle.

[0017] Preferably, the screwing head includes a rotating column, which is connected to the needle body, and a limiting boss is provided on the outer wall of the rotating column, and the limiting boss is provided between the upper push plate and the lower push plate, and the size of the limiting boss is smaller than the size of the slot; a handle is provided on the top of the rotating column, and the handle is located on the top of the upper push plate.

[0018] Preferably, the outer wall of the syringe of the injection cavity section is provided with capacity scale lines.

[0019] Preferably, a tip is provided at the end of the syringe, the tip is used to seal the end of the blood flashback chamber, and the needle passes through the tip.

[0020] Preferably, distance scale lines are provided on the outer wall of the needle.

[0021] Preferably, the syringe is made of transparent material.

[0022] The utility model has the following advantages due to the adoption of the above technical solution:

[0023] 1. The anti-embolism dual-channel syringe provided by the utility model has an injection chamber and a blood return chamber in the syringe barrel. By observing the blood return in the blood return chamber, it can be judged whether the needle is inserted into the blood vessel, thereby avoiding the occurrence of complications caused by the injection of drugs into the blood vessel; at the same time, the needle and syringe form a dual-channel design, so that the injection chamber, injection channel and blood return chamber, blood return channel do not interfere with each other.

[0024] 2. The anti-embolism dual-channel syringe provided by the utility model has a flat needle tip and does not have the puncture bevel of a traditional needle. Combined with a detachable puncture needle, it can effectively pierce the skin even if the fascia layer of the target area is thin, while avoiding cross-layer injection and injecting the drug into non-target areas, thereby improving the accuracy and safety of the injection.

[0025] 3. The anti-embolism dual-channel syringe provided by the present invention has a blood return chamber connected to an air bag, which can generate negative pressure. Under the action of negative pressure, blood will quickly flow back through the blood return channel of the needle into the negative pressure blood return chamber and the air bag. Medical personnel can promptly detect that the needle has pierced the blood vessel, avoiding the occurrence of serious complications caused by the injection of drugs into the blood vessel. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the three-dimensional structure of the anti-embolism dual-channel syringe provided in Example 1 of the present utility model.

[0027] Figure 2 It is a longitudinal cross-sectional schematic diagram of the anti-embolism dual-channel syringe provided by the embodiment of the present utility model.

[0028] Figure 3 This is a structural diagram of the needle tip provided in an embodiment of the present utility model.

[0029] Figure 4 It is a schematic structural diagram of the needle provided in the embodiment of the present utility model.

[0030] Figure 5 It is a structural schematic diagram of the screwing head area provided in an embodiment of the present utility model.

[0031] Markings in the accompanying drawings:

[0032] 1 is a syringe, 101 is a transverse partition, 102 is an injection chamber, 103 is a blood return chamber, 2 is a needle, 201 is a longitudinal partition, 202 is an injection channel, 203 is a blood return channel, 3 is a piston, 301 is a push rod, 302 is a piston head, 303 is an upper push plate, 304 is a lower push plate, 305 is a column, 306 is a slot, 4 is a puncture needle, 401 is a rotating column, 402 is a limiting boss, 403 is a handle, 5 is an airbag, 501 is a valve, and 6 is an end. DETAILED DESCRIPTION

[0033] To make the purpose, technical solution, and advantages of the present invention more clearly apparent, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0035] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "assembly," "disposition," and "connection" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] The utility model provides an anti-embolism dual-channel syringe, which is provided with an injection chamber and a blood return chamber. By observing the blood return in the blood return chamber, it is determined whether the needle is inserted into the blood vessel, thereby preventing the drug from being injected into the blood vessel and causing complications. At the same time, the end of the needle is set to be flat, avoiding the problem of the existing syringe needle riding on the puncture bevel, which causes the drug to be injected into the non-target area.

[0037] Below, the embodiments of the present utility model are described in detail with reference to the accompanying drawings.

[0038] Example

[0039] Please refer to Figures 1 to 5 The present embodiment provides an anti-embolism dual-channel syringe, comprising a syringe 1, a needle 2, a piston 3 and a puncture needle 4;

[0040] A transverse partition 101 is provided in the syringe 1, which divides the interior of the syringe 1 into an upper injection chamber 102 and a lower blood return chamber 103;

[0041] Specifically, the syringe 1 and diaphragm 101 are integrally formed. The syringe 1 is cylindrical and made of a transparent material, such as transparent plastic. The diaphragm 101 is located at the lower portion of the syringe 1. The volume of the blood return chamber 103 is smaller than that of the injection chamber 102. Volume scale lines are provided on the outer wall of the syringe 1 at the injection chamber 102. The volume scale lines can be used to determine the volume of the injected medication. By observing whether blood returns in the blood return chamber 103, it can be determined whether the syringe has penetrated the blood vessel.

[0042] The needle 2 is arranged at the end of the syringe 1, and the upper part of the needle passes through the transverse partition 101. A longitudinal partition 201 is arranged inside the needle 2. The longitudinal partition 201 divides the interior of the needle 2 into an injection channel 202 and a blood return channel 203. The injection channel 202 is connected with the injection cavity 102, and the medicine is directly injected into the patient's body through the injection cavity 102 and the injection channel 202; the blood return channel 203 is connected with the blood return cavity 103. If the needle 2 pierces the blood vessel, blood will enter the blood return cavity 103 through the blood return channel 203. By observing the appearance of blood in the blood return cavity 103, the user can determine that the needle 2 has pierced the blood vessel; the end face of the end of the needle 2 is a plane.

[0043] Specifically, needle 2 is made of steel. A central hole is defined in the center of diaphragm 101, through which the upper portion of needle 2 passes. The top surface of needle 2 is flush with the top surface of diaphragm 101. Needle 2 and the central hole of diaphragm 101 are adhesively bonded, ensuring a secure and airtight connection. The distal end of needle 2 is flat, lacking the puncture bevel of traditional needles. Even if the fascia layer in the target area is thin, cross-layer injection, which could result in drug injection into non-target areas, is avoided.

[0044] The cross-sectional dimension of the injection channel 202 in the needle 2 is larger than the cross-sectional dimension of the blood return channel 203 , which can ensure the efficiency of drug injection and realize the blood return function.

[0045] The piston 3 is movably disposed at one end of the injection chamber 102. The piston 3 includes a push rod 301 and a piston head 302 connected to each other. The piston head 302 is in sliding and sealing contact with the inner wall of the syringe 1.

[0046] Specifically, the piston head 302 can be made of soft rubber, and the contact with the syringe 1 can achieve the sealing of the cavities at both ends of the piston head 302.

[0047] An upper push plate 303 and a lower push plate 304 are provided at the top of the push rod 301 . Two upright posts 305 are provided between the upper push plate 303 and the lower push plate 304 . A slot 306 is provided on the upper push plate 303 .

[0048] The columns 305 are cylindrical, and the two columns 305 are symmetrically arranged between the upper push plate 303 and the lower push plate 304 . The lower push plate 304 is connected to the top surface of the push rod 301 .

[0049] The needle body of the puncture needle 4 passes through the piston 3 and the injection channel 202, and the needle tip of the puncture needle 4 extends out of the injection channel 202. The puncture needle 4 is used to pierce human tissue, making it easier for the needle head 2 to reach the target layer.

[0050] A screwing head is provided at the top of the puncture needle 4, which is connected to the needle body of the puncture needle 4. The screwing head includes a rotating column 401, which is fixedly connected to the needle body of the puncture needle 4 and is located between the upper push plate 303 and the lower push plate 304. A limiting boss 402 is provided on the outer wall of the rotating column 401, which is located between the upper push plate 303 and the lower push plate 304. The upper surface of the limiting boss 402 contacts the lower surface of the upper push plate 303, and the size of the limiting boss 402 is smaller than the size of the slot 306. A handle 403 is provided at the top of the rotating column 401, which is located at the top of the upper push plate 303, and the lower surface of the handle 403 contacts the upper surface of the upper push plate 303. The upper push plate 303 can clamp the limiting boss 402 and the handle 403, thereby preventing the puncture needle 4 from moving up and down.

[0051] The push rod 301 and the piston head 302 are centrally located with a visible puncture needle hole. Align the limiting boss 402 with the slot 306, insert the puncture needle 4 along the puncture needle hole into the injection channel 202 of the needle head 2, and extend the needle out of the injection channel 202. The handle 403 is rotated so that the upper push plate 303 engages the screw head, thereby securing the puncture needle 4. To remove the puncture needle 4, the handle 403 is rotated in the opposite direction, aligning the limiting boss 402 with the slot 306, and the puncture needle 4 is withdrawn. Since the piston head 302 is made of soft rubber, the hole within it automatically closes after the puncture needle 4 is withdrawn, preventing the injected product from spilling out of the hole.

[0052] In this embodiment, an air bag 5 is provided on the outer wall of the syringe 1 , and the air bag 5 is connected to the blood return cavity 103 .

[0053] Specifically, a through hole is opened on the outer wall of the syringe 1 in the blood return chamber 103, and the air bag 5 is connected at the through hole. The air bag 5 is a transparent air bag, and a valve 501 for deflating is provided at the top of the air bag 5.

[0054] The airbag 5 can generate negative pressure in the blood return chamber 103. By opening the valve 501 and squeezing the airbag 5, the valve 501 is closed. Under the action of the elasticity of the airbag 5, negative pressure is generated in the blood return chamber 103. When the needle 2 penetrates into the blood vessel, the blood will quickly flow back into the negative pressure chamber 103 and the airbag 5 under the action of the negative pressure. Medical personnel can promptly discover that the needle 2 has penetrated into the blood vessel, thereby avoiding the occurrence of complications caused by the injection of drugs into the blood vessel.

[0055] The included angle between the axis of the airbag 5 and the axis of the syringe 1 is 30 degrees, which facilitates the operation of the airbag 5 by medical personnel.

[0056] In this embodiment, a tip 6 is provided at the end of the syringe 1 , and the tip 6 is used to seal the end of the blood return cavity 103 , and the needle 2 passes through the tip 6 .

[0057] Specifically, the end cap 6 is cylindrical, with an internal thread on its inner wall, and the end of the syringe 1 is provided with an external thread that is screwed to the internal thread; the end cap 6 is screwed onto the end of the syringe 1, thereby blocking the end cap 6, that is, blocking the end of the blood return chamber 103. The needle 2 passes through the center of the end cap 6 and is fixedly connected to the end cap 6. The end cap 6 clamps and supports the needle 2, thereby ensuring the stability of the needle 2.

[0058] In this embodiment, distance scale lines are provided on the outer wall of the needle 2. By observing the distance scale lines, the depth to which the needle 2 has penetrated into the human tissue can be judged.

[0059] During use of the anti-embolism dual-channel syringe of this embodiment, the puncture needle 4 pierces tissue, driving the distal end of the needle 2 to the target injection area. If blood is detected in the blood flashback chamber 203 and the airbag 5 during insertion, the position of the needle 2 is adjusted until the blood flashback in the blood flashback chamber 203 and the airbag 5 no longer increases, indicating that the distal end of the needle 2 has been removed from the blood vessel. The handle 403 is then turned to withdraw the puncture needle 4 from the syringe 1. The injectable material (hyaluronic acid, collagen, or regenerative material, etc.) is pre-loaded within the injection chamber 102 at the factory. Once the distal end of the needle 2 reaches the target area and confirms that it has not penetrated a blood vessel, the piston 3 is pushed to inject the product into the target area. Because the distal end of the needle 2 is flat, without the puncture bevel of a traditional needle, even if the fascia layer of the target area is thin, cross-layer injection and injection of the drug into non-target areas are prevented. Furthermore, the blood flashback chamber allows real-time monitoring throughout the injection process to determine if the needle has accidentally entered a blood vessel due to various reasons, ensuring a safe injection process.

[0060] Finally, it should be noted that 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 do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An anti-embolism dual-channel syringe, characterized in that: include: A syringe having a transverse partition disposed therein, wherein the transverse partition divides the interior of the syringe into an upper injection chamber and a lower blood return chamber; A needle is provided at the end of the syringe, the upper portion of the needle passes through the transverse partition, a longitudinal partition is provided inside the needle, the longitudinal partition divides the interior of the needle into an injection channel and a blood return channel, the injection channel is connected to the injection cavity, and the blood return channel is connected to the blood return cavity; the end surface of the needle end is a plane; a piston movably disposed at one end of the injection chamber, the piston comprising a push rod and a piston head connected to each other, the piston head being in sliding and sealing contact with the inner wall of the syringe; The puncture needle has a needle body that penetrates the piston and the injection channel, and a needle tip of the puncture needle extends out of the injection channel.

2. The anti-embolism dual-channel syringe according to claim 1, characterized in that: An air bag is provided on the outer wall of the syringe, and the air bag is communicated with the blood return cavity.

3. The anti-embolism dual-channel syringe according to claim 2, characterized in that: The top end of the air bag is provided with a valve for deflation.

4. The anti-embolism dual-channel syringe according to claim 1, characterized in that: An upper push plate and a lower push plate are provided at the top end of the push rod, two columns are provided between the upper push plate and the lower push plate, and a card slot is provided on the upper push plate.

5. The anti-embolism dual-channel syringe according to claim 4, characterized in that: A screwing head is provided on the top of the puncture needle, and the screwing head is connected to the needle body of the puncture needle.

6. The anti-embolism dual-channel syringe according to claim 5, characterized in that: The screwing head includes a rotating column, which is connected to the needle body. A limiting boss is provided on the outer wall of the rotating column. The limiting boss is provided between the upper push plate and the lower push plate. The size of the limiting boss is smaller than the size of the card slot. A handle is provided on the top of the rotating column, and the handle is located on the top of the upper push plate.

7. The anti-embolism dual-channel syringe according to claim 1, characterized in that: The outer wall of the syringe of the injection cavity section is provided with capacity scale lines.

8. The anti-embolism dual-channel syringe according to claim 1, characterized in that: A tip is provided at the end of the syringe, the tip is used to seal the end of the blood flashback cavity, and the needle passes through the tip.

9. The anti-embolism dual-channel syringe according to claim 1, characterized in that: Distance scale lines are arranged on the outer wall of the needle.

10. The anti-embolism dual-channel syringe according to claim 1, characterized in that: The syringe is made of transparent material.

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