Multifunctional infusion set

Abstract

A multifunctional infusion set, comprising a spike, an air inlet device, an upper short tube, a drip chamber, a long catheter and an intravenous infusion needle. The drip chamber comprises a transparent squeezing tube, an upper cover, a lower cover and a flow regulating assembly; a dropper and a vent assembly are provided in the upper cover; a first accommodating cavity is formed in the top of the lower cover, a second accommodating cavity is formed in the bottom of the first accommodating cavity, a liquid outlet is formed in the bottom of the second accommodating cavity, a liquid medicine filter membrane is provided at the connection of the first accommodating cavity and the second accommodating cavity, and a vent element is provided in the second accommodating cavity; and an upper cavity is formed between the top of the vent element and the liquid medicine filter membrane, a side cavity is formed between the outer wall of the vent element and the inner wall of the second accommodating cavity, and a bottom cavity is formed between the bottom of the vent element and the bottom of the second accommodating cavity. The dripping speed can be observed by means of the transparent squeezing tube, automatic venting and bubble generation prevention are achieved by means of the vent assembly and the vent element, precise filtering and automatic liquid-stopping functions are achieved by means of the liquid medicine filter membrane, and a micro-adjusting function is achieved by means of the flow regulating assembly.

Description

A multifunctional infusion device Technical Field

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

[0002] Infusion sets are one of the most commonly used medical devices in clinical practice. Traditional infusion sets offer only basic infusion functions, with numerous drawbacks regarding ease of use, air bubbles, and infusion safety. With advancements in medical care and technology, more and more companies are developing infusion sets with diverse features, such as precision filtration, automatic air venting, automatic fluid stop, bubble prevention, and micro-adjustment. These features offer significant convenience and safety benefits to clinical users, but it's difficult for a single infusion set to integrate multiple functions, resulting in a relatively limited functionality.

[0003] Utility Model Content

[0004] Based on this, the purpose of the present invention is to provide a multifunctional infusion set that can realize the functions of observing dripping rate, automatic exhaust, bubble prevention, precision filtration, automatic liquid stopping and micro-adjustment.

[0005] A multifunctional infusion set comprising a bottle stopper puncture device, an air inlet device, an upper short tube, a drip chamber, a long catheter, and an intravenous infusion needle connected in sequence, wherein the drip chamber comprises a transparent squeeze tube, an upper cover disposed on the top of the transparent squeeze tube, a lower cover disposed on the bottom of the transparent squeeze tube, and a flow regulating assembly rotatably connected to the lower cover, wherein the bottom of the flow regulating assembly is connected to the long catheter;

[0006] The upper cover is provided with a dropper connected to the upper short tube, and an exhaust assembly communicated with the outside;

[0007] The top of the lower cover is provided with a first accommodating chamber, the bottom of the first accommodating chamber is provided with a second accommodating chamber, the bottom of the second accommodating chamber is provided with an upwardly protruding liquid outlet, a liquid filter membrane is provided at the connection between the first accommodating chamber and the second accommodating chamber, and the second accommodating chamber is provided with an exhaust element covering the liquid outlet;

[0008] An upper cavity is formed between the top of the exhaust element and the liquid medicine filter membrane, a side cavity is formed between the outer wall and the inner wall of the second accommodating cavity, and a bottom cavity is formed between the bottom and the bottom of the second accommodating cavity. The bottom cavity, side cavity and upper cavity are connected.

[0009] Compared with the existing technology, in the utility model, the dripping rate can be observed through the transparent squeeze tube, automatic exhaust and bubble prevention are achieved through the exhaust assembly and exhaust element, precise filtration and automatic liquid stopping functions are achieved through the liquid filter membrane, and micro-adjustment function is achieved through the flow adjustment assembly.

[0010] Furthermore, the exhaust element includes an upwardly convex arc portion, and an oblique ring connected to the bottom of the arc portion and extending upward;

[0011] A plurality of first liquid passage holes are provided in the oblique ring, and a plurality of protrusions are provided at the bottom where the oblique ring is connected to the arc-shaped portion. The protrusions abut against the bottom of the second accommodating cavity, and a second liquid passage hole is formed between two adjacent protrusions. The liquid medicine enters the liquid outlet from the upper cavity, the first liquid passage hole, the side cavity, the second liquid passage hole and the bottom cavity in sequence.

[0012] Furthermore, the flow regulating assembly includes a regulating shell rotatably connected to the bottom of the lower cover, and a rubber pad embedded between the regulating shell and the lower cover;

[0013] The bottom of the lower cover is provided with a radially arranged liquid guide groove, the rubber pad is provided with a third liquid passage hole, one end of the liquid guide groove is connected to the third liquid passage hole, and the other end is connected to the bottom of the liquid outlet;

[0014] The bottom of the regulating shell is provided with a liquid outlet joint connected to the long conduit, and the top is provided with a flow control groove connected to the liquid outlet joint. The flow control groove is an annular groove that is not connected at the head and tail, and the third liquid hole is located at the top of the flow control groove.

[0015] Furthermore, the cross-sectional area of ​​the flow control groove gradually increases from zero, and the largest end is connected to the liquid outlet joint.

[0016] Furthermore, the top of the regulating shell is provided with an inner ring rib and an outer ring rib, and the flow control groove is located between the inner ring rib and the outer ring rib.

[0017] Furthermore, the top edge of the adjustment shell extends upward to form a connecting ring wall, and a buckle is provided on the inner side of the connecting ring wall;

[0018] A card slot is provided on the outer wall of the bottom of the lower cover, and the card slot is connected to the buckle.

[0019] Furthermore, the rubber pad is made of rubber or silicone.

[0020] Furthermore, the exhaust assembly includes an exhaust core arranged in the upper cover, an exhaust cavity connected to the exhaust core, and an air filter membrane arranged in the exhaust cavity.

[0021] Furthermore, the end of the exhaust core is 8 mm to 20 mm lower than the end of the dropper.

[0022] Furthermore, the gap between the top end of the liquid outlet and the highest surface of the bottom cavity is 0.4 mm to 1.2 mm. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG1 is a schematic structural diagram of a multifunctional infusion device according to an embodiment of the present invention;

[0024] FIG2 is a cross-sectional view of the drip funnel in FIG1 ;

[0025] FIG3 is a schematic structural diagram of the exhaust element in FIG2 ;

[0026] FIG4 is an exploded view of the liquid medicine filter membrane, exhaust element, and flow regulating assembly in FIG2 ;

[0027] FIG5 is a schematic structural diagram of the adjustment housing in FIG4 .

[0028] Description of main component symbols:

[0029] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0030] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The drawings illustrate several embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present invention.

[0031] Referring to Figures 1 and 2, a multifunctional infusion set provided in one embodiment of the present invention includes a bottle stopper piercer 100, an air inlet device 200, an upper short tube 300, a dripping funnel 400, a long catheter 500, and an intravenous infusion needle 600, which are connected in sequence. The dripping funnel 400 includes a transparent squeeze tube 41, an upper cover 42 disposed on the top of the transparent squeeze tube 41, a lower cover 43 disposed on the bottom of the transparent squeeze tube 41, and a flow regulating assembly 44 rotatably connected to the lower cover 43. The bottom of the flow regulating assembly 44 is connected to the long catheter 500.

[0032] The upper cover 42 is provided with a dropper 421 connected to the upper short tube 300 and an exhaust assembly 422 communicating with the outside;

[0033] The top of the lower cover 43 is provided with a first accommodating chamber 431. The bottom of the first accommodating chamber 431 is provided with a second accommodating chamber 432. The bottom of the second accommodating chamber 432 is provided with an upwardly protruding liquid outlet 433. A liquid filter membrane 45 is provided at the connection between the first accommodating chamber 431 and the second accommodating chamber 432. The second accommodating chamber 432 is provided with an exhaust element 46 that covers the liquid outlet 433.

[0034] An upper chamber 434 is formed between the top of the exhaust element 46 and the liquid medicine filter membrane 45, a side chamber 435 is formed between the outer wall and the inner wall of the second accommodating chamber 432, and a bottom chamber 436 is formed between the bottom and the bottom of the second accommodating chamber 432. The bottom chamber 436, the side chamber 435 and the upper chamber 434 are connected to facilitate the passage of the liquid medicine.

[0035] It should be noted that in this application, the liquid medicine filter membrane 45 is one of a PA membrane, an MCE membrane, a PTFE membrane, a PES membrane, a PVDF membrane, or a PP membrane, and has a nominal pore size of 0.22 μm to 8.0 μm, and is a hydrophilic treated membrane. In this application, the drip rate can be observed through the transparent squeeze tube 41, and automatic exhaust and bubble prevention are achieved through the exhaust assembly 422 and the exhaust element 46. Precision filtration and automatic liquid stopping functions are achieved through the liquid medicine filter membrane 45, and micro-adjustment functions are achieved through the flow control assembly 44.

[0036] 2 and 3 , the exhaust element 46 includes an upwardly convex arc portion 461 and an upwardly extending oblique ring 462 connected to the bottom of the arc portion 461 ;

[0037] A plurality of first liquid passage holes 463 are provided in the oblique ring 462, and a plurality of protrusions 464 are provided at the bottom of the connection between the oblique ring 462 and the arc-shaped portion 461. The protrusions 464 abut against the bottom of the second accommodating cavity 432, and a second liquid passage hole 465 is formed between two adjacent protrusions 464. The liquid medicine enters the liquid outlet 433 in sequence from the upper cavity 434, the first liquid passage hole 463, the side cavity 435, the second liquid passage hole 465 and the bottom cavity.

[0038] 2 , 4 and 5 , the flow regulating assembly 44 includes a regulating shell 441 rotatably connected to the bottom of the lower cover 43 , and a rubber pad 442 embedded between the regulating shell 441 and the lower cover 43 ;

[0039] The bottom of the lower cover 43 is provided with a radially arranged liquid guide groove 437. The rubber pad 442 is provided with a third liquid passage hole 4421. One end of the liquid guide groove 437 is connected to the third liquid passage hole 4421, and the other end is connected to the bottom of the liquid outlet 433.

[0040] The bottom of the regulating shell 441 is provided with a liquid outlet joint 4411 connected to the long conduit 500, and the top is provided with a flow control groove 4412 connected to the liquid outlet joint 4411. The flow control groove 4412 is an annular groove that is not connected at the head and tail, and the third liquid hole 4421 is located at the top of the flow control groove 4412.

[0041] In a preferred embodiment of the present application, the rubber pad 442 is made of rubber or silicone. Specifically, the adjustment housing 441 and the lower cover 43 flatten the rubber pad 442 (ie, interference fit) to a thickness of 0.02 mm to 0.5 mm.

[0042] Please refer to FIG. 5 . The cross-sectional area of ​​the flow control groove 4412 gradually increases from zero, and the largest end is connected to the liquid outlet connector 4411 .

[0043] In a preferred embodiment of the present application, an inner ring rib 4413 and an outer ring rib 4414 are provided on the top of the regulating shell 441, and the flow control groove 4412 is located between the inner ring rib 4413 and the outer ring rib 4414. The rubber pad 442 is squeezed by the inner ring rib 4413 and the outer ring rib 4414 to achieve a sealing function.

[0044] It should be noted that the rotation angle between the adjustment housing 441 and the lower cover 43 cannot exceed 360°. When in the initial position, the liquid guide groove 437 is connected to the third liquid passage hole 4421. At this point, the liquid passage area is maximized, and the liquid flow rate is maximized. During rotation, the axis of the third liquid passage hole 4421 coincides with the centerline of the flow control groove 4412. Since the cross-sectional area of ​​the flow control groove 4412 gradually decreases with increasing rotation angle until the cross-sectional area reaches zero, the liquid passage area between the liquid guide groove 437 and the third liquid passage hole 4421 gradually decreases until the liquid flow rate reaches zero.

[0045] 4 and 5 , the top edge of the adjustment housing 441 extends upward to form a connecting ring wall 4415 , and a buckle 4416 is provided on the inner side of the connecting ring wall 4415 ;

[0046] A latching slot 438 is provided on the bottom outer wall of the lower cover 43 , and the latching slot 438 is connected to the buckle 4416 .

[0047] Specifically, a process hole is provided at the bottom of the buckle 4416, and the process hole facilitates injection molding and demoulding.

[0048] Furthermore, a guard ring is provided on the outer wall of the lower cover 43 , and scale lines are provided on the side walls of the guard ring and the side walls of the adjustment shell 441 for displaying the flow rate control setting value during flow regulation.

[0049] Please refer to FIG. 2 , the exhaust assembly 422 includes an exhaust core 4221 disposed in the upper cover 42 , an exhaust cavity 4222 connected to the exhaust core 4221 , and an air filter membrane 4223 disposed in the exhaust cavity 4222 .

[0050] Specifically, the exhaust core 4221 is provided with an exhaust hole with a diameter of 0.5 mm to 2 mm. The exhaust cavity 4222 is provided with an exhaust plug, and the exhaust plug is provided with a cap that can open and close the exhaust cavity 4222.

[0051] In a preferred embodiment of the present application, the end of the exhaust core 4221 is 8 mm to 20 mm lower than the end of the dropper 421 .

[0052] In a preferred embodiment of the present application, the gap between the top of the liquid outlet 433 and the highest surface of the bottom cavity 436 is 0.4 mm to 1.2 mm.

[0053] It should be noted that when the present invention is in use, the liquid medicine automatically flows into the dripping funnel 400, contacts the liquid medicine filter membrane 45 but does not penetrate the liquid medicine filter membrane 45, and the liquid level in the dripping funnel 400 gradually rises and reaches the height of the end of the exhaust core 4221, and the air in the dripping funnel 400 is discharged through the exhaust core 4221, the air filter membrane 4223, and the exhaust cavity 4222;

[0054] After the liquid medicine in the drip chamber 400 is precisely filtered by the liquid medicine filter membrane 45, the liquid medicine enters the liquid outlet 433 in sequence from the upper chamber 434, the first liquid hole 463, the side chamber 435, the second liquid hole 465 and the bottom chamber, and then passes through the liquid guide groove 437, the third liquid hole 4421, the flow control groove 4412 and the liquid outlet connector 4411 in sequence, and finally flows through the long catheter 500 and the intravenous infusion needle 600, filling the entire inner cavity of the infusion set, realizing the automatic exhaust function. During this process, the special structural design of each inner cavity enables the liquid medicine to fill the inner cavity and squeeze out the air in the inner cavity, so that there are no bubbles in the infusion set during the automatic exhaust process.

[0055] After the first bottle of liquid medicine has been infused, when the liquid level in the drip chamber 400 reaches the liquid filter membrane 45, air cannot penetrate the wet liquid filter membrane 45 due to the hydrophilicity of the liquid filter membrane 45 and the bubble point pressure principle. The liquid level cannot drop further, and the liquid in the entire infusion set stops flowing, thus achieving the automatic liquid stopping function.

[0056] When the bottle stopper piercer 100 is inserted into the second bottle of liquid medicine, the air in the drip chamber 400 is discharged again through the exhaust core 4221, the air filter membrane 4223, and the exhaust cavity 4222, and the liquid medicine rises to the height of the end of the exhaust core 4221 again, and the liquid medicine in the infusion set flows again, realizing the automatic exhaust function of multiple bottles of liquid medicine;

[0057] During the infusion process, the length and cross-sectional area of ​​the flow control slot 4412 of the infusion device can be adjusted by rotating the adjustment shell 441, thereby achieving the function of micro-adjusting the infusion flow rate and closing the infusion channel.

[0058] In summary, this application integrates the functions of observing the dripping rate, automatic exhaust, anti-bubble, precision filtration, automatic liquid stopping and micro-adjustment into the drip bucket. It has a simple and compact structure, comprehensive functions, low manufacturing cost, and is convenient, efficient and safe to use. For manufacturers: the product has a simple structure, low production cost, high profit, leading performance and good sales. For medical staff: it greatly reduces the workload of medical staff, improves work efficiency, and can automatically complete the exhaust of the infusion set and automatically stop the infusion. For patients: there are no unnecessary accessories on the long catheter, which is convenient for movement. There is no need to worry about bubbles and problems of not discovering the drug solution in time after it is infused. It can also precisely filter particulate matter in the drug solution, making the infusion safer.

[0059] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. The above-mentioned embodiments only express several implementation methods of the utility model, and their descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, without departing from the concept of the utility model, several variations and improvements can be made, which all fall within the scope of protection of the utility model. Therefore, the scope of protection of the utility model patent shall be based on the attached claims.

Claims

1. A multifunctional infusion set, comprising a bottle stopper puncture device, an air intake device, an upper short tube, a drip bucket, a long catheter and an intravenous infusion needle connected in sequence, characterized in that: The dripping funnel comprises a transparent squeeze tube, an upper cover arranged at the top of the transparent squeeze tube, a lower cover arranged at the bottom of the transparent squeeze tube, and a flow regulating component rotatably connected to the lower cover, and the bottom of the flow regulating component is connected to the long conduit; The upper cover is provided with a dropper connected to the upper short tube, and an exhaust assembly communicated with the outside; The top of the lower cover is provided with a first accommodating chamber, the bottom of the first accommodating chamber is provided with a second accommodating chamber, the bottom of the second accommodating chamber is provided with a liquid outlet protruding upward, a liquid filter membrane is provided at the connection between the first accommodating chamber and the second accommodating chamber, and the second accommodating chamber is provided with an exhaust element covering the liquid outlet; An upper cavity is formed between the top of the exhaust element and the liquid medicine filter membrane, a side cavity is formed between the outer wall and the inner wall of the second accommodating cavity, and a bottom cavity is formed between the bottom and the bottom of the second accommodating cavity. The bottom cavity, side cavity and upper cavity are connected.

2. The multifunctional infusion set according to claim 1, characterized in that: The exhaust element comprises an arc-shaped portion convex upwardly, and an oblique ring connected to the bottom of the arc-shaped portion and extending upwardly; A plurality of first liquid holes are provided in the oblique ring, and a plurality of protrusions are provided at the bottom of the connection between the oblique ring and the arc-shaped portion. The protrusions abut against the bottom of the second accommodating cavity, and a second liquid hole is formed between two adjacent protrusions. The liquid medicine enters the liquid outlet from the upper cavity, the first liquid hole, the side cavity, the second liquid hole and the bottom cavity in sequence.

3. The multifunctional infusion set according to claim 1, characterized in that: The flow regulating assembly comprises a regulating shell rotatably connected to the bottom of the lower cover, and a rubber pad embedded between the regulating shell and the lower cover; The bottom of the lower cover is provided with a radially arranged liquid guide groove, the rubber pad is provided with a third liquid passage hole, one end of the liquid guide groove is connected to the third liquid passage hole, and the other end is connected to the bottom of the liquid outlet; The bottom of the regulating shell is provided with a liquid outlet joint connected to the long conduit, and the top is provided with a flow control groove connected to the liquid outlet joint. The flow control groove is an annular groove that is not connected at the head and the tail, and the third liquid hole is located at the top of the flow control groove.

4. The multifunctional infusion set according to claim 3, characterized in that: The cross-sectional area of ​​the flow control slot gradually increases from zero, and the largest end is connected to the liquid outlet joint.

5. The multifunctional infusion set according to claim 3, characterized in that: An inner ring convex rib and an outer ring convex rib are arranged on the top of the regulating shell, and the flow control groove is located between the inner ring convex rib and the outer ring convex rib.

6. The multifunctional infusion set according to claim 3, characterized in that: The top edge of the adjustment shell extends upward to form a connecting ring wall, and a buckle is provided on the inner side of the connecting ring wall; A card slot is provided on the bottom outer wall of the lower cover, and the card slot is connected to the buckle.

7. The multifunctional infusion set according to claim 3, characterized in that: The rubber pad is made of rubber or silicone.

8. The multifunctional infusion set according to claim 1, characterized in that: The exhaust assembly comprises an exhaust core arranged in the upper cover, an exhaust cavity connected to the exhaust core, and an air filter membrane arranged in the exhaust cavity.

9. The multifunctional infusion set according to claim 8, characterized in that: The end of the exhaust core is 8 mm to 20 mm lower than the end of the dropper.

10. The multifunctional infusion device according to any one of claims 1 to 9, characterized in that: The gap between the top of the liquid outlet and the highest surface of the bottom cavity is 0.4 mm to 1.2 mm.

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