Anti-overflow type anti-tumor drug infusion device connecting device

Abstract

The utility model discloses an anti -spill formula anti -tumor medicine infusion device connecting device, include: the coaxial link's upper cylinder and lower cylinder, the partition of connecting two cylinders, the puncture needle of penetrating the partition, be equipped with the fixed sleeve of the connecting piece rotatable connection in the lower cylinder outer wall in the lower cylinder, use this device, can realize the cooperation clearance of puncture needle and medicine bottle mouth zero external overflow, and puncture needle will not displace in the process of plugging, be applicable to chemotherapy transfusion, biological preparation infusion etc. scene, have remarkable social and economic benefits.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to an anti-overflow antitumor drug infusion set connection device, which is particularly suitable for a protective structure to prevent drug leakage when changing infusion bottles. Background Technology

[0002] During chemotherapy for cancer, infusion sets require frequent changes of different types of anti-tumor drugs. Existing infusion sets often experience drug leakage when inserting or removing the IV needle (the connection between the puncture needle and the drug bottle) due to poor sealing or structural design flaws. This spilled anti-tumor drug is highly toxic and may harm healthcare workers, patients, and the environment.

[0003] Traditional infusion set connection devices have the following problems:

[0004] (1) Poor sealing: The gap between the puncture needle and the mouth of the medicine bottle is prone to leakage, especially when the pressure of the medicine solution changes;

[0005] (2) Unstable fixation: The puncture needle is prone to displacement during insertion and removal, causing the medication to drip.

[0006] Therefore, there is an urgent need for an infusion set connection device that is simple in structure, has reliable sealing, and can effectively prevent drug leakage. Utility Model Content

[0007] To overcome the problems in the background art, this utility model provides an anti-overflow antitumor drug infusion set connection device.

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0009] An anti-spillage antitumor drug infusion set connection device includes:

[0010] An upper cylinder and a lower cylinder are coaxially connected, wherein the diameter of the upper cylinder is larger than the diameter of the lower cylinder;

[0011] A partition plate connecting the two cylinders has an annular groove formed on its upper periphery, and a sealing element is embedded in the groove;

[0012] The puncture needle that penetrates the partition includes an upper needle section above the partition, a middle section that penetrates the partition, and a lower needle section below the partition. The middle section is a frustum structure that is interference-fitted with the through hole of the partition.

[0013] The lower cylinder is equipped with a connector, the top of which abuts against the bottom surface of the partition plate, and a connecting pipe extends out from the bottom. The connecting pipe is provided with barbs on its outer periphery.

[0014] A fixed sleeve that can be screwed onto the outer wall of the lower cylinder has an internal thread on its inner wall that mates with the external thread of the lower cylinder, and a circular hole is formed at the bottom for the connecting pipe to pass through.

[0015] Furthermore, the sealing element is a silicone ring gasket.

[0016] Furthermore, the maximum outer diameter of the middle section of the puncture needle is greater than the diameter of the through hole, and the minimum outer diameter is smaller than the diameter of the through hole.

[0017] Furthermore, the connector is clearance-fitted with the lower cylinder, and its outer diameter is equal to the inner diameter of the lower cylinder.

[0018] Furthermore, the barbs are elastic protrusions evenly distributed along the circumference of the connecting tube. The infusion tube is fitted onto the connecting tube, and the barbs support and fix the infusion tube.

[0019] Furthermore, the inner cylinder of the upper cylinder is threaded, and is threaded to the mouth of the medicine bottle.

[0020] The beneficial effects of this utility model are:

[0021] (1) Zero spillage: Double leak prevention through sealing components and puncture needle fixing structure;

[0022] (2) Quick installation: The threaded connection design simplifies the operation process;

[0023] (3) High reliability: The barb and the fixing sleeve work together to ensure a stable connection of the infusion tube. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0026] Figure 2 This is an exploded schematic diagram of the device of this utility model;

[0027] Figure 3 This is a front structural diagram of the present invention;

[0028] Figure 4 This is the utility model Figure 3 Sectional view at point AA;

[0029] Figure 5 This is a three-dimensional structural diagram of the device of this utility model;

[0030] 1-Upper cylinder, 2-Lower cylinder, 3-Baffle, 31-Groove, 32-Through hole, 4-Sealing element, 5-Punch needle, 51-Upper needle section, 52-Middle section, 53-Lower needle section, 6-Connector, 61-Connecting tube, 62-Barb, 7-Fixing sleeve, 71-Internal thread, 72-Round hole, 8-Infusion tube. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] See Figures 1 to 5 This utility model discloses an anti-overflow antitumor drug infusion set connection device, comprising:

[0033] The upper cylinder 1 and the lower cylinder 2 are coaxially connected. The diameter of the upper cylinder 1 is larger than that of the lower cylinder 2. The upper cylinder 1 has an inner diameter of 12mm and a height of 20mm. The outer wall is threaded for screwing medicine bottles. The lower cylinder 2 has an inner diameter of 18mm and a height of 30mm. The outer wall is threaded with M18×1 external threads.

[0034] A partition 3 connects the two cylinders, and an annular groove 31 is formed on its upper periphery. A sealing element 4 is embedded in the groove 31. The partition 3 is coaxially connected, the partition 3 is 3mm thick, and a through hole 32 with a diameter of 2.5mm is opened in the center. The groove 31 has a groove depth of 1mm and a groove width of 2mm. A silicone sealing element 4 is embedded in the groove 31. The sealing element 4 has an outer diameter of 14mm and an inner diameter of 10mm. After compression, it forms a seal with the mouth of the medicine bottle.

[0035] The puncture needle 5 that penetrates the partition 3 includes an upper needle section 51 located above the partition 3, a middle section 52 that penetrates the partition 3, and a lower needle section 53 located below the partition 3. The middle section 52 is a frustum structure that is interference-fitted with the through hole 32 of the partition.

[0036] The lower cylinder 2 is provided with a connector 6, the top of which abuts against the bottom surface of the partition 3, and a connecting pipe 61 extends out from the bottom. The outer periphery of the connecting pipe 61 is provided with barbs 62.

[0037] A fixing sleeve 7 that can be screwed onto the outer wall of the lower cylinder 2 has an inner thread 71 that mates with the outer thread 21 of the lower cylinder 2, and a round hole at the bottom for the connecting pipe 6 to pass through.

[0038] It should be noted that the connector 6 is made of polypropylene with an outer diameter of 18mm and its top abuts against the bottom surface of the partition 3. The connector 61 has an outer diameter of 4mm and the barb 62 is made of elastic TPU with a height of 1mm, used to clamp the infusion tube 8. The fixing sleeve 7 has an M18×1 internal thread 71 inside. When tightened, it pushes the connector 6 upward to ensure that its top is always pressed against the partition 3.

[0039] See Figure 2 , Figure 3 , Figure 4 As shown, the working principle of this device is as follows:

[0040] (1) Screw the bottle mouth into the upper cylinder 1, and press the bottle mouth against the silicone sealing piece 4 to achieve a seal;

[0041] (2) The puncture needle 5 penetrates the sealing film of the medicine bottle, and the medicine flows into the connecting tube 6 through the puncture needle 5;

[0042] (3) After the fixing sleeve 7 is tightened, the barb 62 opens the infusion tube wall to form an interference seal.

[0043] In this embodiment, the structure of the seal 4 is further defined. The silicone seal 4 has a Shore A50 hardness and a compression rate of 30%. After installation, it protrudes 0.5mm from the surface of the groove. When the bottle mouth is screwed into the upper cylinder 1, the seal 4 is deformed under pressure, completely filling the gap between the bottle mouth and the inner wall of the upper cylinder 1, blocking the path of liquid leakage.

[0044] In this embodiment, the dimensions of the middle section 52 of the puncture needle are optimized. The maximum outer diameter of the middle section 52 of the puncture needle is greater than the diameter of the through hole 32, and the minimum outer diameter is less than the diameter of the through hole 32. The top diameter of the frustum is 3.1 mm, the bottom diameter is 2.4 mm, and the diameter of the through hole 32 of the partition is 2.5 mm. When the puncture needle 5 is installed, the top of the frustum undergoes elastic deformation due to its larger diameter than the through hole 32, forming a radial clamping force. The smaller diameter ensures smooth insertion. The actual test shows that the puncture needle 5 can withstand an axial tensile force of 5 N without displacement.

[0045] In this embodiment, the fitting relationship between the connector 6 and the lower cylinder 2 is defined. The connector 6 and the lower cylinder 2 are in clearance fit, with the outer diameter of the connector 6 equal to the inner diameter of the lower cylinder 2. The outer diameter of the connector 6 is 18mm (tolerance -0.1mm), and the inner diameter of the lower cylinder 2 is 18mm (tolerance +0.1mm), forming a clearance fit (maximum clearance 0.2mm). This design allows the connector 6 to float slightly, avoiding jamming due to machining errors, while ensuring accurate axial positioning when the fixing sleeve 7 is tightened.

[0046] In this embodiment, the structure of the barb 62 is refined. The barb 62 is an elastic protrusion evenly distributed around the circumference of the connecting tube 61. The infusion tube 8 is fitted onto the connecting tube 61, and the barb 62 supports and fixes the infusion tube 8. Each barb 62 is a right-angled triangle with a 30° inclination angle and a height of 1 mm. When the infusion tube 8 (inner diameter 3.5 mm) is fitted, the inclination of the barb 62 guides the expansion of the tube wall, and the vertical surface is inserted into the tube wall to form a lock.

[0047] In this embodiment, the inner cylinder of the upper cylinder 1 is threaded and is installed onto the mouth of the medicine bottle through the thread.

[0048] It should be noted that after the device was assembled, it was put into actual use and compared with a commercially available infusion set connection device.

[0049] Test conditions: Simulated medicine bottle replacement 50 times, infusion pressure 50 kPa, the data are shown in the table below.

[0050] Number of overflows 0 8 times Displacement of puncture needle ≤0.1mm ≥0.5mm Connecting pipe detachment force 15N 8N

[0051] Data shows that this invention is significantly superior to existing products in terms of spillage prevention and structural stability. This invention can be mass-produced by injection molding, with a single component costing less than 2 yuan. It is suitable for scenarios such as chemotherapy infusion and biological agent infusion, and has significant social and economic benefits.

[0052] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A spill-proof antitumor drug infusion set connection device, characterized in that, include: An upper cylinder (1) and a lower cylinder (2) are coaxially connected, wherein the diameter of the upper cylinder (1) is larger than the diameter of the lower cylinder (2); The partition (3) connecting the two cylinders has an annular groove (31) formed on its upper periphery, and a sealing element (4) is embedded in the groove (31); The puncture needle (5) that penetrates the partition (3) includes an upper needle section (51) above the partition (3), a middle section (52) penetrating the partition (3) and a lower needle section (53) below the partition (3). The middle section (52) is a frustum structure that is interference-fitted with the through hole (32) of the partition. The lower cylinder is provided with a connector (6), the top of which abuts against the bottom surface of the partition plate, and the bottom extends out of the connector (61). The connector (61) is provided with barbs (62) on its outer periphery. A fixed sleeve (7) that can be screwed onto the outer wall of the lower cylinder has an inner thread (71) that mates with the outer thread (21) of the lower cylinder (2) and a round hole (72) at the bottom for the connecting pipe (61) to pass through.

2. The anti-overflow antitumor drug infusion set connection device according to claim 1, characterized in that, The sealing element (4) is a silicone ring gasket.

3. The anti-overflow antitumor drug infusion set connection device according to claim 1, characterized in that, The maximum outer diameter of the middle section (52) of the puncture needle is greater than the diameter of the through hole (32), and the minimum outer diameter is less than the diameter of the through hole (32).

4. The anti-overflow antitumor drug infusion set connection device according to claim 1, characterized in that, The connector (6) is clearance-fitted with the lower cylinder (2), and its outer diameter is equal to the inner diameter of the lower cylinder (2).

5. The anti-overflow antitumor drug infusion set connection device according to claim 1, characterized in that, The barb (62) is an elastic protrusion evenly distributed along the circumference of the connecting tube (61). The infusion tube (8) is fitted onto the connecting tube (61), and the barb (62) supports and fixes the infusion tube (8).

6. The anti-overflow antitumor drug infusion set connection device according to claim 1, characterized in that, The inner cylinder of the upper cylinder (1) is threaded and is installed onto the mouth of the medicine bottle through the thread.

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