A splash-proof injection needle mechanism for high-pressure injectors

Abstract

This utility model discloses a splash-proof injection needle mechanism for a high-pressure injector, relating to medical consumables, and proposes a solution to the problem of liquid splashing in existing technologies. The injection needle includes a butterfly connector and a needle tube that are interconnected; the needle tube is used to insert into the human body, and the port of the butterfly connector away from the needle tube is connected to the infusion tubing of the high-pressure injector; a needle sheath covers the needle tube, with openings at both ends; a first port is fixed to the butterfly connector, and a second port extends beyond the needle tube; a cap is provided outside the second port to seal it; a buffer sheet is filled inside the second port. The advantage is that the high-speed liquid ejected from the needle tube is buffered and blocked by the buffer sheet, temporarily stored inside the needle sheath. However, the buffer sheet is not watertight, so the liquid will flow out at a slower speed at the second port of the needle sheath, thus avoiding splashing caused by high-speed jetting. The cost of changing the needle sheath structure is far lower than the cost of improving the pressure roller or injection procedure in existing technologies.

Description

Technical Field

[0001] This utility model relates to medical consumables for high-pressure injectors, and more particularly to a splash-proof injection needle mechanism for high-pressure injectors. Background Technology

[0002] A high-pressure injector uses a rapidly rotating pressure roller to compress the infusion tubing, directly injecting contrast agents and saline solutions into the patient's arteries. The infusion tubing connects to the body via the injection needle, whose structure is as follows: Figure 1 , Figure 2 As shown. It consists of a butterfly connector 11 and a needle tube 12. The needle tube 12 is used to insert into the human body, and the port of the butterfly connector 11 furthest from the needle tube 12 connects to the infusion tubing. Before injection, to prevent accidental injury to medical staff, the needle tube 12 is protected by a needle sheath 20. The injection needle and the corresponding needle sheath 20 constitute the injection needle mechanism, as shown. Figure 3 As shown.

[0003] Before the injection, the medical staff's operating procedures are as follows:

[0004] S1-1. Lay the disposable infusion tubing onto the high-pressure injector as specified;

[0005] S1-2. Set the injection program for the high-pressure injector;

[0006] S1-3. Hold the butterfly connector 11 and pull out the needle sheath 20 to expose the needle tube 12, then aim the needle tube 12 at the medical waste collection bin;

[0007] S1-4. Start the pressurizing wheel to purge the gas from the infusion line. The gas is then released through the syringe 12.

[0008] S1-5. When the liquid is steadily discharged from the syringe 12, it indicates that the gas has been purged and the pressurizing wheel should be stopped.

[0009] S1-6. Hold the butterfly connector 11 and insert the needle 12 into the human body;

[0010] S1-7. Start the injection program of the high-pressure injector and automatically complete the injection process;

[0011] S1-8. Remove needle 12 to end the operation.

[0012] The problem with the existing technology is that in steps S1-5, due to the high speed of the pressure roller of the high-pressure injector and the large output pressure, while the inner diameter of the needle tube 12 is very small, the flow velocity of the liquid when it is discharged is extremely high. The specific flow velocity is difficult to measure accurately. For a more intuitive description, a general scenario test was conducted in the equipment manufacturing workshop: the needle tube 12 was fixed 1m above the ground, with the ejection direction fixed horizontally; the pressure roller was activated, and the distance between the liquid's landing point and the shadow of the needle tube 12 on the ground exceeded 2m. Therefore, in actual operating room scenarios, the discharged liquid often splashes out of the medical waste collection bin. This medical waste collection bin often also contains packaging bags for disposable medical consumables, which exacerbate the splashing situation, including high-frequency noise generated by the collision of the liquid with the packaging bag and raising the liquid's landing point.

[0013] Furthermore, it's necessary to explain the difference between emptying a high-pressure injector and emptying a regular manual intramuscular injection syringe. Emptying an intramuscular injection syringe is entirely manual and characterized by low flow rate and volume. Emptying a high-pressure injector, on the other hand, is the opposite.

[0014] Although manufacturers in the industry have received feedback from frontline medical staff, they have tried to solve the problem efficiently and at low cost by addressing issues with pressure rollers or injection procedures. Utility Model Content

[0015] The purpose of this invention is to provide a splash-proof injection needle mechanism for high-pressure injectors, so as to solve the problems existing in the prior art.

[0016] The splash-proof injection needle mechanism for a high-pressure injector described in this utility model consists of an injection needle and a matching needle sleeve; the injection needle includes a butterfly connector and a needle tube that are interconnected; the needle tube is used to pierce the human body, and the port of the butterfly connector away from the needle tube is connected to the infusion line of the high-pressure injector.

[0017] The needle sheath covers the outside of the needle tube, and both ends of the needle sheath are provided with openings; the first port is fixed on the butterfly connector, and the second port extends outside the needle tube; a cover is provided outside the second port to close the port; the second port is filled with a buffer sheet.

[0018] The buffer sheet is a sponge sheet or a mesh plastic sheet.

[0019] Inside the needle sheath, a water-blocking plate is provided at the middle position; the needle tube passes through the water-blocking plate.

[0020] The water-blocking sheet is a rubber sheet or a silicone sheet.

[0021] The anti-splash injection needle mechanism for high-pressure injectors described in this invention has the advantage that the high-speed liquid ejected from the needle tube is buffered and blocked by a buffer plate, temporarily stored inside the needle sheath. However, the buffer plate is not watertight, so the liquid flows out at a slower rate at the second port of the needle sheath, thus avoiding splashing caused by high-speed jetting. The cost of changing the needle sheath structure is far lower than the cost of improving the pressure roller or injection procedure in the prior art. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of an injection needle in the prior art.

[0023] Figure 2 This is a cross-sectional structural diagram of an injection needle in the prior art.

[0024] Figure 3 This is a cross-sectional schematic diagram of an injection needle mechanism in the prior art.

[0025] Figure 4 This is a cross-sectional schematic diagram of the anti-splash injection needle mechanism described in this utility model.

[0026] Figure 5 yes Figure 4 A magnified view of a portion of the image.

[0027] Figure 6 This is a diagram showing the changing usage states of the anti-splash injection needle mechanism described in this utility model.

[0028] Figure label:

[0029] 11-Butterfly connector, 12-Needle tube;

[0030] 20-Needle sheath, 21-Cover body, 22-Buffer sheet, 23-Water-blocking sheet. Detailed Implementation

[0031] The anti-splash injection needle mechanism for high-pressure injectors described in this utility model is as follows: Figure 4 , Figure 5 As shown, it consists of an injection needle and a matching needle sheath 20. The injection needle includes a butterfly connector 11 and a needle tube 12 that are interconnected. The needle tube 12 is used to insert into the human body, and the port of the butterfly connector 11 away from the needle tube 12 is connected to the infusion tubing of a high-pressure injector.

[0032] The needle sheath 20 covers the needle tube 12, and both ends of the needle sheath 20 have openings. The first port is fixed on the butterfly connector 11, and the second port extends beyond the needle tube 12. A cover 21 is provided outside the second port to close it. The second port is filled with a buffer sheet 22. The buffer sheet 22 is a sponge sheet or a mesh plastic sheet.

[0033] Inside the needle sheath 20, a water-blocking plate 23 is provided at the middle position. The needle tube 12 passes through the water-blocking plate 23. The water-blocking plate 23 is a rubber sheet or a silicone sheet. The function of the water-blocking plate 23 is to prevent the liquid medicine from flowing back to the first port when it cannot flow out in time from the buffer plate 22.

[0034] The anti-splash injection needle mechanism for a high-pressure injector described in this utility model operates as follows: Figure 6 As shown. When used in conjunction with a high-pressure injector, the medical staff's operating procedures before injection are as follows:

[0035] S2-1. Lay the disposable infusion tubing onto the high-pressure injector as specified;

[0036] S2-2. Set the injection program for the high-pressure injector;

[0037] S2-3. Hold the butterfly connector 11 and / or needle sheath 20; detach the cover 21 to release the second port; then align the second port with the medical waste collection bin;

[0038] S2-4. Start the pressurizing wheel to purge the gas from the infusion tubing. The gas is first released through the needle tube 12 into the needle sheath 20; then it is buffered and blocked by the buffer plate 22 and discharged through the second port.

[0039] S2-5. After the gas is vented, the liquid will be discharged from the second port in the same manner, stopping the pressurizing wheel from working;

[0040] S2-6. Holding the butterfly connector 11, pull out the needle sheath 20 to expose the needle tube 12, and insert the needle tube 12 into the human body;

[0041] S2-7. Start the injection program of the high-pressure injector and automatically complete the injection process;

[0042] S2-8. Remove syringe 12 to end the operation.

[0043] Compared to existing technologies, this method buffers the high-speed, slender liquid column during discharge into a slower, thicker liquid column, allowing the liquid column to fall primarily under its own gravity. This effectively reduces splashing issues within medical waste collection bins.

[0044] For those skilled in the art, various other corresponding changes and modifications can be made based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of this utility model.

Claims

1. A splash-proof injection needle mechanism for a high-pressure injector, comprising an injection needle and a matching needle sheath (20); the injection needle includes a butterfly connector (11) and a needle tube (12) that are interconnected; the needle tube (12) is used to insert into the human body, and the port of the butterfly connector (11) away from the needle tube (12) is connected to the infusion line of the high-pressure injector; the needle sheath (20) covers the needle tube (12); Its features are, Both ends of the needle sheath (20) are open; the first port is fixed on the butterfly connector (11), and the second port extends outside the needle tube (12); a cover (21) is provided outside the second port to close the port; a buffer sheet (22) is filled inside the second port.

2. The anti-splash injection needle mechanism for a high-pressure injector according to claim 1, characterized in that, The buffer sheet (22) is a sponge sheet or a mesh plastic sheet.

3. The anti-splash injection needle mechanism for a high-pressure injector according to claim 1, characterized in that, Inside the needle sheath (20), a water-blocking plate (23) is provided at the middle position; the needle tube (12) passes through the water-blocking plate (23).

4. The anti-splash injection needle mechanism for a high-pressure injector according to claim 3, characterized in that, The water-blocking plate (23) is a rubber sheet or a silicone sheet.

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