A dual-chamber syringe for ultrasound-guided nerve block

Abstract

The present invention relates to the field of medical supplies, and specifically to a double-chamber syringe that can be used for ultrasound-guided nerve block, comprising a syringe body, a syringe shunt end and an extension tube, wherein the syringe shunt end is composed of a first shunt tube, a second shunt tube, a base, an adjustment disk and a syringe mastoid, wherein the first shunt tube and the second shunt tube are connected to the base, the base is sealed to the mastoid, the adjustment disk is respectively provided with a first opening and a second opening, the adjustment disk is adjusted and rotated by an adjustment handle, so that the first and second shunt tubes are respectively connected to the first and second openings to achieve switch adjustment, and the first shunt tube and the second shunt tube are respectively connected to a medicine bag and a syringe body. The present invention effectively solves the hidden danger of injection contamination caused by replacing syringes back and forth during the extraction and injection of saline and local anesthetic solution during ultrasound-guided nerve block.

Description

Technical Field

[0001] The invention relates to the field of medical devices, and in particular to a double-chamber syringe that can be used for ultrasound-guided nerve block. Background Art

[0002] In clinical medical work, it is often necessary to inject two kinds of liquid medicine alternately or successively, such as ultrasound-guided nerve block. In ultrasound-guided nerve block, "water separation" and "water positioning" techniques are required, that is, by first injecting normal saline to determine the position of the needle tip and observe whether the diffusion of the liquid medicine is at the correct level and position. If the needle tip position and the liquid medicine diffusion are correct, the local anesthetic solution can be injected to complete the nerve block. This requires two syringes to extract normal saline and local anesthetic solution respectively in advance. When using, the two syringes are replaced back and forth according to the puncture situation, which poses a risk of injection contamination, and the syringes are easy to fall off, making the operation cumbersome; in addition, in the process of extracting normal saline and local anesthetic solution, it is inevitable that air will enter the syringe, and the bubbles mixed in the liquid medicine are difficult to exhaust. The liquid medicine containing tiny bubbles will directly interfere with the ultrasound image after injection, making the image confusing and unable to be identified, so that the operation cannot continue. The double-chamber syringe body of the present invention is provided with two independent chambers, and the injection of the medicine in the two chambers is controlled by a regulating valve, thereby solving the risk caused by replacing the syringe back and forth; the syringe and the extension tube are connected by threads, thereby avoiding the syringe from falling off during operation; the filtering part of the extension tube is provided with a precision medicine liquid filter membrane and a PTFE air filter membrane, which can filter impurities in the medicine liquid during the injection process to ensure the injection safety, and can discharge bubbles in the medicine liquid, thereby solving the interference of bubbles on the ultrasonic image. Summary of the invention

[0003] In view of the technical problems existing in the prior art, the object of the present invention is to provide a double-chamber syringe that can be used for ultrasound-guided nerve block. In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: including a syringe body, a syringe shunt end and an extension tube, the syringe shunt end is composed of a first shunt tube, a second shunt tube, a base, an adjustment disk and a syringe mastoid, the first shunt tube and the second shunt tube are connected to the base, the base is sealed and connected to the syringe mastoid, the adjustment disk is fixedly connected with a pin, the adjustment disk is connected to the axial hole in the center of the base through the pin, the other end of the pin is fixedly connected to the adjustment handle, a sealed and rotatable structure is formed between the adjustment disk and the base, the adjustment disk is respectively provided with a first opening and a second opening near the edge, and the adjustment disk is connected through the adjustment handle Adjust the rotation so that the first shunt tube is connected to the first opening, and the second shunt tube is connected to the second opening, so as to realize switch adjustment; after the first shunt tube is sealed and connected to the syringe body, it is sealed and connected to the medicine bag, and the second shunt tube is connected to the syringe body, an extension tube nipple is provided at one end of the extension tube, and a syringe docking port is provided at the other end, a filter cavity is provided near the end of the syringe docking port, a precision liquid medicine filter membrane is provided inside the filter cavity, an air filter hole is provided on the side of the filter cavity near the syringe docking port, a PTFE air filter membrane is provided in the air filter hole, an external thread is provided on the outer surface of the syringe nipple away from the opening, and an internal thread is provided in the syringe docking port.

[0004] Preferably, a protrusion is provided at the front end of the syringe body near the second shunt tube, so that a medicine bag accommodating groove is formed at the front end of the syringe body near the first shunt tube.

[0005] Preferably, two limiting protrusions are provided on the lower surface of the base, and when the adjustment disk is closed, the adjustment handle is located between the two limiting protrusions.

[0006] Preferably, when the adjustment handle contacts the outer surface of the first shunt tube, the first shunt tube is completely connected to the first opening, and when the adjustment handle contacts the outer surface of the second shunt tube, the second shunt tube is completely connected to the second opening.

[0007] Preferably, the syringe body and the extension tube are connected via the external thread and the internal thread.

[0008] The present invention effectively solves the hidden danger of injection contamination caused by replacing syringes back and forth during the process of extracting and injecting physiological saline and local anesthetic solution during nerve block under ultrasound guidance, and solves the problem of easy detachment of syringes and cumbersome operation; at the same time, the setting of the filter cavity solves the problem of interference of tiny bubbles on ultrasonic images during injection of liquid medicine, and can avoid the risk of impurities in the liquid medicine to the human body through the filtering effect of the precision liquid medicine filter membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the structure of the syringe of the present invention;

[0010] Figure 2 It is a partial enlarged schematic diagram of the syringe A of the present invention;

[0011] Figure 3 It is a bottom view schematic diagram of the base structure of the present invention;

[0012] Figure 4 It is a bottom view schematic diagram of the adjustment disk structure of the present invention;

[0013] Figure 5 It is a bottom view schematic diagram of the connection between the base and the adjustment disk of the present invention;

[0014] Figure 6 It is a bottom view schematic diagram of the first shunt pipe and the first opening being connected to each other in the present invention;

[0015] Figure 7 It is a bottom view schematic diagram of the second shunt pipe and the second opening being connected to each other according to the present invention;

[0016] Figure 8 This is a schematic diagram of the extension tube structure of the present invention;

[0017] Fig. 9 It is a partial enlarged schematic diagram of the extension tube B of the present invention;

[0018] Fig.10 This is a schematic diagram of the installation structure of the PTFE air filter membrane in the filter chamber of the present invention;

[0019] Fig.11 This is a schematic diagram of the connection between the syringe and the extension tube of the present invention;

[0020] In the figure: 1. syringe body; 2. syringe shunt end; 3. syringe mastoid; 4. external thread; 5. first shunt tube; 6. second shunt tube; 7. medicine capsule; 8. bump; 9 medicine capsule receiving groove; 10. adjustment plate; 11. base; 12. adjustment handle; 13. limit bump; 14. shaft hole; 15. pin; 16. first opening; 17. second opening; 18. extension tube mastoid; 19. extension tube; 20. syringe docking port 21. internal thread; 22. filter chamber; 23. precision liquid medicine filter membrane; 24 air filter hole; 25. PTFE air filter membrane. DETAILED DESCRIPTION

[0021] To further describe the double-chamber syringe of the present invention that can be used for ultrasound-guided nerve block, it is further described below in conjunction with the accompanying drawings.

[0022] Figure 1-11A double-chamber syringe for ultrasound-guided nerve block comprises a syringe body (1), a syringe shunt end (2) and an extension tube (19); the syringe shunt end (2) is composed of a first shunt tube (5), a second shunt tube (6), a base (11), an adjustment disk (10) and a syringe mastoid (3); the first shunt tube (5) and the second shunt tube (6) are in communication with the base (11); the base (11) and the syringe mastoid (3) are sealed; the adjustment disk (10) is fixedly connected with a pin (15); the adjustment disk (10) is connected to an axial hole (14) at the center of the base (11) via the pin (15); the other end of the pin (15) is fixedly connected to an adjustment handle (12); a sealed and rotatable structure is formed between the adjustment disk (10) and the base (11); the adjustment disk (10) is respectively provided with first openings near the edge thereof. (16) and a second opening (17), the adjusting disk (10) is adjusted and rotated by the adjusting handle (12), so that the first shunt tube (5) is connected to the first opening (16), and the second shunt tube (6) is connected to the second opening (17), so as to realize switch adjustment; the first shunt tube (5) is sealedly connected to the syringe body (1) and is sealedly connected to the medicine bag (7), and the second shunt tube (6) is connected to the syringe body (1), one end of the extension tube (19) is provided with an extension tube nipple (18), and the other end is provided with a syringe docking port (20), a filter chamber (22) is provided at one end close to the syringe docking port (20), a precision liquid medicine filter membrane (23) is provided inside the filter chamber (22), an air filter hole (24) is provided on the side of the filter chamber (22) close to the syringe docking port (20), and a PTFE air filter membrane (25) is provided inside the air filter hole (24).

[0023] The outer surface of the syringe nipple (3) away from the opening is provided with an external thread (4).

[0024] The syringe docking port (20) is provided with an internal thread (21).

[0025] A protrusion (8) is provided at the front end of the syringe body (1) near the second shunt tube (6), so that a medicine bag receiving groove (9) is formed at the front end of the syringe body (1) near the first shunt tube (5).

[0026] The lower surface of the base (11) is provided with two limiting protrusions (13); when the adjusting disk (10) is closed, the adjusting handle (12) is located between the two limiting protrusions (13).

[0027] When the adjustment handle (12) contacts the outer surface of the first shunt tube (5), the first shunt tube (5) is completely connected to the first opening (16); when the adjustment handle (12) contacts the outer surface of the second shunt tube (6), the second shunt tube (6) is completely connected to the second opening (17).

[0028] The syringe body (1) and the extension tube (19) are connected via the external thread (4) and the internal thread (21).

[0029] Working principle: When in use, the adjusting handle (12) is pushed in the direction of the second shunt tube (6) so that the second shunt tube (6) is connected to the syringe mastoid (3) through the second opening (17), the syringe push rod is pulled to extract the local anesthetic solution, and after the air is exhausted, the adjusting handle (12) is pushed to close the second shunt tube (6), and the adjusting handle (12) is pushed toward the first shunt tube (5) so that the first shunt tube (5) is connected to the syringe mastoid (3) through the first opening (16), and physiological saline is extracted into the medicine bag (7), and after the air is exhausted, the adjusting handle is pushed The handle (12) is moved between the two limit protrusions (13) to place the first shunt tube (5) and the second shunt tube (6) in a closed state. The syringe nipple (3) and the syringe docking interface (20) of the extension tube (19) are docked and the threads are tightened. The extension tube nipple (18) and the puncture needle are connected. The adjustment handle (12) is pushed to open the first shunt tube (5). The syringe push rod is pushed to discharge the air in the extension tube (19) and the puncture needle. The adjustment handle (12) is pushed to close the first shunt tube (5) and the second shunt tube (6). Puncture is performed under ultrasound guidance. When physiological saline needs to be injected, the adjustment handle (12) is pushed to open the first shunt tube (5) for push injection. When local anesthetic solution needs to be injected, the adjustment handle (12) is pushed to switch to open the second shunt tube (6) for push injection. The precise liquid medicine filter membrane (23) and the PTFE air filter membrane (25) can filter impurities and bubbles in the liquid medicine. The injection is switched back and forth according to the operation requirements, thereby completing the switch injection of the two liquid medicines.

[0030] The above contents are merely examples and explanations of the concept of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the concept of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims

1. A double-chamber syringe that can be used for ultrasound-guided nerve block, characterized in that: The invention comprises a syringe body (1), a syringe shunt end (2) and an extension tube (19); the syringe shunt end (2) is composed of a first shunt tube (5), a second shunt tube (6), a base (11), an adjustment disk (10) and a syringe nipple (3); the first shunt tube (5) and the second shunt tube (6) are in communication with the base (11); the base (11) and the syringe nipple (3) are sealed; the adjustment disk (10) is fixedly connected with a pin shaft (15); the adjustment disk (10) is connected with an axial hole (14) at the center of the base (11) through the pin shaft (15); the other end of the pin shaft (15) is fixedly connected with an adjustment handle (12); a sealed and rotatable structure is formed between the adjustment disk (10) and the base (11); the adjustment disk (10) is respectively provided with a first opening (16) and a second opening (17) near the edge; the adjustment disk (10) is rotatably adjusted by the adjustment handle (12) The first shunt tube (5) is moved so that it is connected to the first opening (16), and the second shunt tube (6) is connected to the second opening (17), so as to realize switch adjustment; after the first shunt tube (5) is sealed and connected to the syringe body (1), it is sealed and connected to the medicine bag (7), and the second shunt tube (6) is connected to the syringe body (1); one end of the extension tube (19) is provided with an extension tube nipple (18), and the other end is provided with a syringe docking port (20); a filter cavity (22) is provided at one end close to the syringe docking port (20), and a precision liquid medicine filter membrane (23) is provided inside the filter cavity (22); an air filter hole (24) is provided on the side of the filter cavity (22) close to the syringe docking port (20), and a PTFE air filter membrane (25) is provided inside the air filter hole (24); an external thread (4) is provided on the outer surface of the syringe nipple (3) away from the opening, and an internal thread (21) is provided inside the syringe docking port (20).

2. A double-chamber syringe for ultrasound-guided nerve block according to claim 1, characterized in that: A protrusion (8) is provided at the front end of the syringe body (1) near the second shunt tube (6), so that a medicine bag receiving groove (9) is formed at the front end of the syringe body (1) near the first shunt tube (5).

3. A double-chamber syringe for ultrasound-guided nerve block according to claim 1, characterized in that: The lower surface of the base (11) is provided with two limiting protrusions (13); when the adjusting disk (10) is closed, the adjusting handle (12) is located between the two limiting protrusions (13).

4. A dual-chamber syringe for ultrasound-guided nerve block according to claim 1, characterized in that: When the adjustment handle (12) contacts the outer surface of the first shunt tube (5), the first shunt tube (5) is completely connected to the first opening (16); when the adjustment handle (12) contacts the outer surface of the second shunt tube (6), the second shunt tube (6) is completely connected to the second opening (17).

5. A dual-chamber syringe for ultrasound-guided nerve block according to claim 1, characterized in that: The syringe body (1) and the extension tube (19) are connected via an external thread (4) and an internal thread (21).

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