Novel blood transfusion apparatus

Abstract

The utility model discloses a novel blood transfusion apparatus which comprises a blood transfusion catheter, first connectors connected with a blood bag and the tail end of an injection remaining needle are arranged at the two ends of the blood transfusion catheter, and the first connectors can be in threaded connection with an unthreaded needle-free connector on the blood bag and the tail end of the injection remaining needle; a third connector used for injecting medicine is arranged on the blood transfusion catheter; the third connector comprises a sealing plug used for sealing, the sealing plug is provided with an opening which is closed in a natural state, and when administration is needed, the front end (without a needle) of an injector can be inserted into the opening of the sealing plug of the third connector. Needle-free drug delivery and blood transfusion are achieved, and therefore safety and convenience of operation of medical staff can be improved.

Description

Technical Field

[0001] The utility model relates to a blood transfusion device, belonging to a medical auxiliary device. Background Art

[0002] A blood transfusion set is an infusion device that establishes a pathway between blood and veins. It consists of a bottle insertion needle, an air inlet needle or air inlet hole, or an air filter device, a needle cap, a Y-shaped three-way pipeline, a hose on the pipeline and a flow-stop clamp, a dropper (the dropper contains a blood filter), a pipeline, a dosing port, a flow regulator, an injection piece, and an intravenous needle or injection needle of size 7 or above.

[0003] However, the blood transfusion device connectors currently in clinical use are more common, such as the blood transfusion device with a precision blood filtration device disclosed in the utility model with authorization publication number CN206822900U, which includes a catheter, a bottle stopper puncture device at one end of the catheter, and an injection needle at the other end. A dropper, an air valve, a regulator, a liquid stop clamp, a liquid injection piece, etc. are arranged in the middle of the catheter. The injection needle is used to directly insert into the patient's vein, which increases the risk of operation for medical staff. Medical staff are also required to disinfect it to keep it in a sterile state to prevent bacterial infection. At the same time, its liquid injection piece is also inserted into the liquid injection piece by the injection needle for drug administration, which also brings risks to medical staff's operation and is easy to puncture the liquid injection piece, resulting in failure of the blood transfusion device.

[0004] Therefore, in order to prevent medical staff from being injured during operation, facilitate disinfection, ensure that the interior is always sterile, and prevent bacterial infection, a new blood transfusion device that overcomes the defects of the above-mentioned existing blood transfusion devices and is safe, easy to operate, and can conveniently administer drugs has become the goal pursued by those skilled in the art. Summary of the Invention

[0005] The utility model aims to solve the problems of the existing blood transfusion device in that the operation is complicated and the safety is poor when used by medical staff.

[0006] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a new blood transfusion device, characterized in that it comprises: a blood transfusion catheter, wherein both ends of the blood transfusion catheter have first connectors connected to a blood bag and to the tail end of an injection needle, the first connector comprises a connecting seat 1 having an internal thread connected to the end of the blood transfusion catheter, the central hole of the connecting seat 1 is communicated with the blood transfusion catheter, a threaded end cap 1 is threadedly connected to the free end of the connecting seat 1, and is used to seal and protect the end of the connecting seat 1; a third connector for injecting medicine is provided on the blood transfusion catheter ; The third connector includes: a connecting seat 2 connected to the blood transfusion catheter and a hollow cylindrical threaded connection port with an external thread integrally formed at the front end of the connecting seat 2, the connecting seat 2 includes a first part in the shape of a hollow column with a diameter larger than the threaded connection port, the tail end of the first part is connected to a second part perpendicular to the first part and connected to the first part, the second part is tubular, and both ends of the second part are connected to the blood transfusion catheter; a sealing plug is provided in the threaded connection port, and the sealing plug has an opening that is naturally closed, and a threaded end cap 2 is provided on the outside of the threaded connection port.

[0007] As a preferred embodiment, the connecting seat is in the shape of a hollow column, and includes a first connecting segment, a second connecting segment, and a third connecting segment which are connected in sequence and have decreasing diameters. The front end of the first connecting segment is open, and the inner surface has an internal thread. The second connecting segment extends backward to the outer periphery of the third connecting segment, forming an annular space between the second connecting segment and the third connecting segment. The blood transfusion catheter is inserted into the annular space and connected to the connecting seat by hot melting. A plug-in interface is provided in the center of the first connecting segment, which is in the shape of a hollow column and has a front end protruding from the end face of the first connecting segment.

[0008] As a preferred embodiment, a blood transfusion branch is connected to the middle part of the blood transfusion catheter, and a second connector is provided at the end of the blood transfusion branch. The second connector includes a bottle stopper puncture device having a through hole in the center connected to the blood transfusion branch and a puncture device cap covering the bottle stopper puncture device.

[0009] As a preferred solution, the sealing plug includes two outer flanges and inner flanges that are sealed on the outer end face and inner end face of the threaded connection port, and the outer flange, inner flange and the outer end face and inner end face of the threaded connection port are bonded and fixed. The outer flange and the inner flange are both provided with openings, and the openings are closed in a natural state. The inner flange and the outer flange are connected by a sealing tube, and the sealing tube is in the shape of a flat ring tube. The channel of the sealing tube is connected to the openings on the inner flange and the outer flange.

[0010] As a preferred solution, a filter device and a speed regulator are provided on the blood transfusion catheter, and a filter net is provided in the filter device.

[0011] As a preferred solution, the blood transfusion catheter and the blood transfusion branch tube are provided with a blood transfusion clamp.

[0012] During use, the new blood transfusion device described in this utility model provides a first connector at each end of the blood transfusion catheter. The first connector's connection base is screwed onto the threaded, needle-free interface on the blood bag, and then onto the threaded, needle-free interface at the end of the indwelling needle used for blood transfusion, thereby achieving a needle-free blood transfusion process. When medication is required while transfusing blood, the threaded end cap of the third connector on the blood transfusion catheter can be unscrewed, and the front end of the syringe can be directly inserted into the opening of the sealing plug of the third connector to inject the medication directly into the blood transfusion catheter, achieving needle-free medication administration. Therefore, the new blood transfusion device described in this utility model can ensure that there is no risk of needlestick injuries during the blood transfusion process, thereby improving the safety of clinical nurses.

[0013] Furthermore, the new blood transfusion device described in the present invention has a second connector arranged in parallel with the first connector. The second connector is an existing bottle cork puncture device, which is directly plugged into the blood transfusion port of the existing blood transfusion bag. Therefore, the first connector or the second connector can be selected according to the different interfaces on the blood transfusion bag. If the blood transfusion interface on the blood bag is a threaded needle-free interface, the first connector is connected to it. When there is no threaded needle-free interface on the blood transfusion belt, the bottle cork puncture device can be directly used for connection. When it is necessary to inject medicine, the front end of the syringe (needle-free) can be directly inserted into the opening of the sealing plug of the third connector for administration.

[0014] Therefore, the new blood transfusion device described in the utility model can effectively prevent medical staff from being stabbed during operation, has the advantages of being easy to disinfect, ensuring that the interior is always in a sterile state, and preventing bacterial infection. It has the advantages of high safety, easy operation and convenient medication. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the novel blood transfusion device described in the present utility model;

[0016] Figure 2 This is a cross-sectional view of the first connector of the new blood transfusion device described in the present utility model;

[0017] Figure 3 This is a cross-sectional view of the first connector of the novel blood transfusion device of the present invention with the threaded end cap removed;

[0018] Figure 4 This is a cross-sectional view of the third connector of the new blood transfusion device described in the present utility model;

[0019] Figure 5 This is an end view of the sealing plug of the third connector of the new blood transfusion set described in the present utility model;

[0020] Figure 6 yes Figure 5 AA cross-sectional view.

[0021] Explanation of the accompanying drawings: first connector 1, connecting base 11, first connecting section 111, second connecting section 112, third connecting section 113, plug interface 114, threaded end cap 12; second connector 2, bottle stopper piercer 21, piercer cap 22; third connector 3; connecting base 2 31, first part 311, second part 312, threaded connection port 32, sealing plug 33, opening 331, outer flange 332, inner flange 333, sealing tube 334, threaded end cap 2 34, filter device 4, filter screen 41, blood transfusion catheter 5, blood transfusion branch tube 51, speed regulator 6, blood transfusion clamp 7. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the preferred embodiments cannot be used to limit the scope of protection of the present invention.

[0023] See also Figure 1-6 The figure shows a novel blood transfusion device, which includes: a blood transfusion catheter 5, with first connectors 1 at both ends of the blood transfusion catheter 5, the first connectors 1 being used to connect to a blood bag and the tail end of an injection needle, respectively. The first connector 1 includes a connecting seat 11 and a threaded end cap 12. The connecting seat 1 is connected to the end of the blood transfusion catheter 5 and is hollow cylindrical with an internal thread at the front end. The central hole of the connecting seat 11 is in communication with the blood transfusion catheter 5. The threaded end cap 12 is threadedly connected to the free end of the connecting seat 11 to seal and protect the end of the connecting seat 11.

[0024] Specifically, see Figure 2 、 3 The connector 11 is hollow and cylindrical, comprising a first connecting segment 111, a second connecting segment 112, and a third connecting segment 113, which are connected in sequence and have decreasing diameters. The front end of the first connecting segment 111 is open and has internal threads on its inner surface. The second connecting segment 112 extends rearward to the outer periphery of the third connecting segment 113, forming an annular space between the second and third connecting segments 112, 113. The blood transfusion catheter 5 is inserted into this annular space and connected to the connector 11 via heat fusion. A hollow, cylindrical plug-in interface 114 is located in the center of the first connecting segment 111 and protrudes from the first connecting segment 111. When not in use, a threaded end cap 12 is screwed onto the first connecting segment 111 to protect the plug-in interface 114.

[0025] See also Figure 4 In order to safely administer the drug and avoid using an injection needle to administer the drug into the blood transfusion tube, a third connector 3 for injecting the drug is provided on the blood transfusion tube 5;

[0026] The third connector 3 comprises an integrally formed second connector base 31 and a threaded connection port 32. The second connector base 31 is connected to the blood transfusion catheter 5 by heat-melting. The threaded connection port 32 is a hollow cylindrical shape with external threads, which is integrally formed at the front end of the second connector base 31. The second connector base 31 includes a first hollow cylindrical portion 311 with a diameter larger than the threaded connection port 32. The tail end of the first portion 311 is connected to a second portion 312 perpendicular to and connected to the first portion 311. The second portion 312 is tubular, and the blood transfusion catheter 5 is connected at both ends of the second portion 312. Preferably, the second portion has a small diameter portion at both ends, and the blood transfusion catheter 5 is sleeved on this small diameter portion and heat-melted. A sealing plug 33 is provided within the threaded connection port 32, with an opening 331 that is naturally closed. The threaded connection port 32 is externally provided with a second threaded end cap 34. When not in use, the second threaded end cap 34 is connected to the threaded connection port 32 to protect it.

[0027] During use, first unscrew the threaded end cap 12 from the connector 11, then plug the plug interface 114 on the connector 11 into the interface of the blood bag, insert the plug interface 114 through the sealed opening on the interface of the blood bag, and tighten the first connecting section 111 to the external thread interface of the blood bag; similarly, unscrew the threaded end cap 12 at the other end, plug the plug interface 114 on the connector 11 into the sealed opening on the tail end interface of the injection needle, and tighten the first connecting section 111 to the external thread on the tail end interface of the injection needle, and then you can start blood transfusion. When it is necessary to inject medicine to the patient, unscrew the threaded end cap 2 34, then insert the front end of the syringe (without the needle) through the opening 331 on the sealing plug 33 in the threaded connection port 32, enter the second part 312 at the rear of the threaded interface 32, and inject the medicine into the cavity of the first part 311. Because the first connectors 1 at both ends of the new blood transfusion device described in the present invention both adopt a needle-free threaded connection method, and the third connector 3 for injection and drug administration also adopts a needle-free threaded connection method, this can greatly reduce the risk of medical personnel's operation and improve the safety of use.

[0028] See also Figure 1Furthermore, to expand the applicability of the new blood transfusion device, a blood transfusion branch 51 is connected to the middle portion of the blood transfusion catheter 5. A second connector 2 is provided at the end of the blood transfusion branch 51. The second connector 2 comprises a bottle stopper puncture device 21 with a central through-hole connected to the blood transfusion branch 51 and a puncture device cap 22. In other words, the liquid inlet end of the blood transfusion catheter 5 consists of two parallel blood transfusion branches 51, which are respectively connected to the first connector 1 and the second connector 2. The second connector 2 is a conventional tapered connector that can be directly inserted into the blood transfusion port of the blood bag. It is suitable for blood bags that only have a blood transfusion port and no threaded connection interface.

[0029] See also Figure 5 、 6 Specifically, the sealing plug 33 of the third connector 3 includes an outer flange 332 and an inner flange 333 that are sealed on the outer end face and inner end face of the threaded connection port 32. The outer flange 332, the inner flange 333 and the outer end face and the inner end face of the threaded connection port 32 are bonded and fixed. The outer flange 332 and the inner flange 333 are both provided with an opening 331. The opening 331 is closed in a natural state. The inner flange 333 and the outer flange 332 are connected by a sealing tube 334. The sealing tube 334 is in the shape of a flat ring tube. The channel of the sealing tube 334 is connected to the inner flange 333 and the opening 331 on the outer flange 332.

[0030] See also Figure 1 A filter device 4 and a speed regulator 6 are provided on the blood transfusion conduit 5 . A filter screen 41 is provided in the filter device. A blood transfusion clamp 7 is provided on the blood transfusion conduit 5 and the blood transfusion branch tube 51 .

[0031] The above description is merely illustrative and non-restrictive of the present invention. The present invention is intended to provide a new blood transfusion device. Those skilled in the art will understand that many modifications, variations, or equivalents may be made without departing from the spirit and scope of the claims. For example, changes may be made to the connection method between the second connector seat of the third connector and the blood transfusion catheter, but all of these changes will fall within the scope of protection of the present invention.

Claims

1. A new blood transfusion device, characterized in that: It includes: A blood transfusion catheter (5), wherein both ends of the blood transfusion catheter (5) have a first connector (1) connected to a blood bag and to the tail end of an injection needle, wherein the first connector (1) comprises a connecting seat (11) having an internal thread connected to the end of the blood transfusion catheter (5), wherein the central hole of the connecting seat (11) is in communication with the blood transfusion catheter (5), and a threaded end cap (12) is threadedly connected to the free end of the connecting seat (11) for sealing and protecting the end of the connecting seat (11); A third connector (3) for injecting medicine is provided on the blood transfusion catheter (5); the third connector (3) comprises: a second connection seat (31) connected to the blood transfusion catheter (5) and a threaded connection port (32) in the shape of a hollow column with an external thread integrally formed at the front end of the second connection seat (31); the second connection seat (31) comprises a first part (311) in the shape of a hollow column with a diameter larger than that of the threaded connection port (32); the tail end of the first part (311) is connected to a second part (312) perpendicular to the first part (311) and in communication with the first part; the second part (312) is tubular, and both ends of the second part (312) are connected to the blood transfusion catheter (5); a sealing plug (33) is provided in the threaded connection port (32); the sealing plug (33) has an opening (331) in a naturally closed state; and the threaded connection port (32) is provided with a second threaded end cap (34) on the outside.

2. A new blood transfusion device according to claim 1, characterized in that: The connecting seat (11) is in the shape of a hollow column and comprises a first connecting section (111), a second connecting section (112), and a third connecting section (113) which are connected in sequence and have decreasing diameters. The front end of the first connecting section (111) is open and the inner surface has an internal thread. The second connecting section (112) extends backward to the outer periphery of the third connecting section (113), forming an annular space between the second connecting section (112) and the third connecting section (113). The blood transfusion catheter (5) is inserted into the annular space and connected to the connecting seat (11) by hot melting. A plug-in interface (114) is provided in the center of the first connecting section (111) and is in the shape of a hollow column and the front end of which protrudes from the end surface of the first connecting section (111).

3. A new blood transfusion device according to claim 1, characterized in that: A blood transfusion branch tube (51) is connected to the middle of the blood transfusion conduit (5), and a second connector (2) is provided at the end of the blood transfusion branch tube (51). The second connector (2) includes a bottle stopper piercer (21) having a through hole in the center and connected to the blood transfusion branch tube (51), and a piercer cap (22) covering the bottle stopper piercer (21).

4. A new blood transfusion device according to claim 1, characterized in that: The sealing plug (33) comprises an outer flange (332) and an inner flange (333) which are sealed on the outer end surface and the inner end surface of the threaded connection port (32). The outer flange (332), the inner flange (333) and the outer end surface and the inner end surface of the threaded connection port (32) are bonded and fixed to each other. The outer flange (332) and the inner flange (333) are both provided with an opening (331). The opening (331) is closed in a natural state. The inner flange (333) and the outer flange (332) are connected by a sealing tube (334). The sealing tube (334) is in the shape of a flat ring tube. The channel of the sealing tube (334) is communicated with the openings (331) on the inner flange (333) and the outer flange (332).

5. A new blood transfusion device according to any one of claims 1 to 4, characterized in that: A filter device (4) and a speed regulator (6) are provided on the blood transfusion conduit (5), and a filter screen (41) is provided in the filter device.

6. A new blood transfusion device according to any one of claims 1 to 4, characterized in that: The blood transfusion conduit (5) and the blood transfusion branch tube (51) are provided with a blood transfusion clamp (7).

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