Tube flushing and sealing adapter of double-cavity venous catheter

Abstract

The utility model relates to the technical field of flushing and sealing tube adapters, in particular to a flushing and sealing tube adapter of a double-cavity venous catheter. The flushing and sealing tube adapter of the double-cavity venous catheter comprises a three-way connector and a liquid separation branch tube, and the box-shaped three-way connector is provided with a three-way input end and a three-way output end which are communicated with each other; the three-way input end is matched with the end part of the injector, so that the end part of the injector can be directly and fixedly connected with the three-way input end; a branch pipe seat is arranged at the liquid separation input end, so that the liquid separation branch pipe is separably connected with the three-way output end, and the three-way output end is matched with the branch pipe seat; and an infusion needle head is arranged at the liquid separation output end. According to the utility model, the main cavity pipeline and the side cavity pipeline can be simultaneously flushed by one injector, the number of the connecting ports of the double-cavity venous catheter can be increased according to the requirement, and the number of the connecting ports of the double-cavity venous catheter can be temporarily increased to four or more, so that the conveying requirements of various medicaments can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of flush and seal pipe adapter, and specifically to a flush and seal pipe adapter of double-lumen venous catheter. BACKGROUND

[0002] In clinical practice, the flush and seal operation steps of double-lumen venous catheter are as follows: one syringe filled with flush and seal pipe liquid is connected to each end of the double-lumen venous catheter, and it is required to hold two syringes with one hand and push the syringes synchronously to reduce the deviation between the two syringes. This operation is difficult, and newly-licensed medical staff generally cannot handle it. In view of this operation difficulty, the prior art proposes the following solutions.

[0003] Solution one: clamp solution. As disclosed in Chinese patent document CN221950361U, a PICC seal pipe syringe fixing device includes a needle cylinder seat and a piston rod seat, and two or three seal pipe syringes can be quickly and neatly assembled into one body. During the injection process, the syringes are not easy to tilt, and the drug administration rhythm can be kept consistent.

[0004] Solution two: double nipple solution. As disclosed in Chinese patent document CN214596768U, a pre-charged double-lumen central venous catheter flush and seal pipe special double nipple syringe is provided with two nipples communicating with the inside of the syringe body at one end of the syringe body. The two nipples can be connected to the main and side lumens of the double-lumen central venous catheter respectively, and one syringe can be used to flush the main and side lumens of the double-lumen central venous catheter simultaneously.

[0005] Solution three: adapter pipe solution. As disclosed in Chinese patent document CN212166308U, a venous catheter flush and seal pipe device is provided with a three-way liquid injection pipe at one end of the syringe. The three-way liquid injection pipe includes a hose, a three-way connector, and a venous catheter lumen cannula. One hose is connected to a flush pipe liquid syringe, and the other two hoses are each connected to a venous catheter lumen cannula, which can simultaneously flush and seal the double-lumen venous catheter lumen cannula.

[0006] Among them, in Chinese patent document CN212166308U adopting the adapter pipe solution, the three-way connector is connected to the syringe by a hose. After the flush and seal pipe is completed, a certain amount of flush and seal pipe liquid will be left in the hose, causing waste of flush and seal pipe liquid.

[0007] Secondly, although the above three modes are beneficial to the solution of the technical problem, they are relatively single in function. In practice, the double-lumen venous catheter may encounter a situation where the lumen is not enough. As disclosed in Chinese patent document CN209734739U, a deep venous catheter with changeable lumen number can change one lumen into two lumens to meet different infusion needs. UTILITY MODEL CONTENTS

[0008] The utility model discloses a purpose at overcoming prior art's insufficient, provide a kind of flush pipe adapter of double-lumen venous catheter, it is beneficial to flush to the main, side two lumen pipeline simultaneously, and flush pipe liquid waste amount is smaller, temporarily increase the connecting port of double-lumen venous catheter can also.

[0009] In order to achieve the above object, the technical scheme of the utility model is as follows:

[0010] The flush pipe adapter of double-lumen venous catheter includes:

[0011] The tee joint has a tee input end and a tee output end that are in communication with each other;

[0012] The liquid distribution branch pipe has at least two equal lengths, one end is a liquid distribution input end for connecting with the tee output end, and the other end is a liquid distribution output end for connecting with the venous catheter;

[0013] The tee joint is in the shape of a box, the tee input end is adapted to the end of the syringe so that the end of the syringe can be directly fixedly connected with the tee input end; the liquid distribution input end is provided with a branch pipe seat so that the liquid distribution branch pipe can be separably connected with the tee output end, and the tee output end is adapted to the branch pipe seat; and the liquid distribution output end is provided with an infusion needle.

[0014] The inventive concept of the present application is that, compared with the scheme described in Chinese patent document CN212166308U, the connecting hose between the tee and the syringe is omitted, the syringe is directly plugged with the tee joint, the flush pipe liquid in the syringe is directly delivered to the liquid distribution branch pipe through the tee joint, and the length of the pipeline for residual flush pipe liquid is reduced. Secondly, the tee joint is in the shape of a box, and the plugging with the syringe is relatively convenient. The tee joint can also be repeatedly used, and one tee joint can be matched with multiple liquid distribution branch pipes. Thirdly, since the liquid distribution branch pipe can be separably connected with the tee output end, and the liquid distribution output end is provided with an infusion needle, when the infusion needles of the two liquid distribution branch pipes are simultaneously inserted into the lumen of one venous catheter, one venous catheter will have two connection ends, and the two connection ends can be respectively connected with two different medicaments, thereby increasing the connection end of the venous catheter.

[0015] As an improvement, the tee joint is in the shape of a triangle, and the three sides of the tee joint respectively correspond to one tee input end or one tee output end; and the tee input end is provided with a protection plunger. The two tee output ends are respectively located on the two sides, and the protection plunger of the tee input end is used to protect the tee input end from being contaminated in the non-use state.

[0016] As improvement, the tee joint is square or round, the tee input end and the tee output end are arranged around the tee joint, the tee input end comprises one screw end and one straight end to adapt to different connecting end of the syringe, and the tee input end is provided with a protection plunger which is in sealing connection with the tee input end.

[0017] As improvement, the tee output end protrudes from the surface of the tee joint, and the tee output end is composed of a threaded bottom and a variable-diameter top; the branch pipe seat has a screw segment and a straight segment which are adapted to the tee output end. The scheme is favorable for ensuring the stability and sealing of the connection.

[0018] As improvement, the tee joint is provided with a needle cylinder sleeve which is located at the tee input end. The needle cylinder sleeve is favorable for increasing the stability of the connection between the tee joint and the syringe.

[0019] As further improvement, the needle cylinder sleeve is detachably arranged with the tee joint, and one side of the needle cylinder sleeve is provided with a bayonet for clamping into the tee joint. In practice, the needle cylinder sleeve can be selectively used.

[0020] As improvement, the infusion needle is provided with a needle handle. On one hand, the needle handle is convenient for hand operation, and on the other hand, when two infusion needles are simultaneously inserted into the lumen of one venous catheter, the adhesive tape can be wound at the needle handle, so that the fixation of the infusion needle and the human body is realized.

[0021] As further improvement, considering the waste of residual flushing pipe liquid and the portability of operation, the length of the branch pipe is 15-25 cm.

[0022] In summary, the utility model has the advantages of simple structure, convenient combination and multiple functions, is favorable for simultaneously implementing flushing of the main and side two-cavity pipelines by one syringe, and can increase the connecting port of the double-cavity venous catheter according to the requirement, temporarily expand the connecting port of the double-cavity venous catheter to four or even more, so as to meet the delivery requirement of various medicaments. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 Fig. 1 is a structural schematic view of the utility model embodiment 1, and the branch pipe on the right side of the figure adopts a sectional view drawing method;

[0024] Figure 2 Fig. 2 is a structural schematic view of the tee joint in the utility model embodiment 1;

[0025] Figure 3 Fig. 3 is a sectional view of the utility model; Figure 2 Fig. 4 is a sectional view of the utility model;

[0026] Figure 4 Fig. 5 is a state schematic view when two infusion needles of the branch pipes are simultaneously inserted into one venous catheter;

[0027] Figure 5 It is a structure schematic view of the three-way joint of the embodiment 2 of the utility model.

[0028] In the figure: 10, three-way joint; 11, three-way input end; 12, three-way output end; 121, threaded bottom; 122, variable diameter top; 13, protective plunger; 20, liquid separation branch pipe; 21, branch pipe base; 22, infusion needle; 23, needle handle; 30, needle cylinder sleeve; 31, bayonet; 40, intravenous catheter. DETAILED DESCRIPTION

[0029] The utility model will be further described below in combination with specific embodiments. It should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0030] Embodiment 1

[0031] As shown in Figure 1 , Figure 2 , Figure 3 The double-lumen intravenous catheter flush and seal tube adapter of the scheme includes three components, three-way joint 10, liquid separation branch pipe 20 and needle cylinder sleeve 30.

[0032] Among them, three-way joint 10 is in the shape of a triangular box, with 1 three-way input end 11 and 2 three-way output ends 12 communicating with each other, and the three edges of three-way joint 10 correspond to one three-way input end 11 or one three-way output end 12 respectively. The three-way input end 11 is adapted to the end of the syringe so that the end of the syringe can be directly fixedly connected with the three-way input end 11. In the unused state, the protective plunger 13 is inserted in the three-way input end 11. When used, the end of the syringe is directly inserted after the protective plunger 13 is pulled out. The three-way output end 12 protrudes from the surface of the three-way joint 10, and the three-way output end 12 is composed of a threaded bottom 121 and a variable diameter top 122, which can ensure the stability and sealing of the connection at the same time.

[0033] The three-way joint 10 is reusable, and one three-way joint 10 can be provided with a plurality of branch pipes 20, which are generally not reusable. The branch pipes 20 are equal in length, and the length is preferably 20 cm. Of course, the length of the branch pipes 20 can be appropriately reduced or increased, and a length in the range of 15-25 cm is acceptable. One end of the branch pipe 20 is a branch input end for connecting with the three-way output end 12, and the other end of the branch pipe 20 is a branch output end for connecting with the venous catheter 40. The branch input end is provided with a branch pipe seat 21 so that the branch pipe 20 is detachably connected with the three-way output end 12. The three-way output end 12 is adapted to the branch pipe seat 21, and the branch pipe seat 21 has a screw segment and a straight segment adapted to the three-way output end 12. In the unused state, the branch pipe seat 21 is fixed on the three-way output end 12.

[0034] The branch output end is provided with infusion needles 22 provided with needle handles 23. When flushing or sealing the main and side lumen lines of the double-lumen venous catheter 40, the two infusion needles 22 are respectively inserted into the main and side lumen lines of the venous catheter 40. When it is necessary to increase the input connection end of the venous catheter 40, the branch pipe seat 21 is removed from the three-way output end 12, and the two infusion needles 22 are simultaneously inserted into the lumen of one venous catheter 40, as shown in Figure 4

[0035] The three-way joint 10 is further provided with a needle cylinder sleeve 30, which is annular and used for clamping one end of a syringe. The needle cylinder sleeve 30 is detachably provided with the three-way joint 10, and one side of the needle cylinder sleeve 30 is provided with a bayonet 31 for clamping the three-way joint 10. After the bayonet 31 clamps the edge of the three-way joint 10, the needle cylinder sleeve 30 is located at the three-way input end 11.

[0036] Example 2

[0037] As shown in Figure 5 , the difference between this embodiment and example 1 is that the three-way joint 10 is square, and the two three-way input ends 11 and the two three-way output ends 12 are arranged around the three-way joint 10. One three-way input end 11 adopts a screw port, and the other three-way input end 11 adopts a straight port. When a syringe with a screw port is used, the three-way input end 11 with the screw port is selected for connection. When a syringe with a straight port is used, the three-way input end 11 with the straight port is selected for connection. Obviously, the three-way joint 10 can also adopt a circular shape or other shapes.​

Claims

1. A flush tube adapter for double-lumen venous catheters, comprising: a tee joint (10) having a tee input end (11) and a tee output end (12) in communication with each other; a plurality of at least two branch tubes (20) of equal length, one end of which is a branch input end for connecting with the tee output end (12), and the other end of which is a branch output end for connecting with a venous catheter (40); characterized in that: the tee joint (10) is in the shape of a box, the tee input end (11) is adapted to the end of a syringe so that the end of the syringe can be directly and fixedly connected with the tee input end (11); the branch input end is provided with a branch tube seat (21) so that the branch tube (20) can be separably connected with the tee output end (12), the tee output end (12) is adapted to the branch tube seat (21); and the branch output end is provided with an infusion needle (22).

2. The flush tube adapter for double-lumen venous catheters according to claim 1, characterized in that: the tee joint (10) is in the shape of a triangle, and the three sides of the tee joint (10) correspond to one tee input end (11) or one tee output end (12) respectively; and the tee input end (11) is provided with a protective plunger (13).

3. The flush tube adapter for double-lumen venous catheters according to claim 1, characterized in that: the tee joint (10) is in the shape of a square or a circle, the tee input end (11) and the tee output end (12) are arranged around the tee joint (10), the tee input end (11) includes one screw end and one straight end, and the tee input end (11) is provided with a protective plunger (13).

4. The flush tube adapter for double-lumen venous catheters according to claim 1, characterized in that: the tee output end (12) protrudes from the surface of the tee joint (10), and the tee output end (12) is composed of a threaded bottom (121) and a variable-diameter top (122); and the branch tube seat (21) has a screw segment and a straight segment which are adapted to the tee output end (12).

5. The flush tube adapter for double-lumen venous catheters according to claim 1, characterized in that: the tee joint (10) is provided with a needle cylinder sleeve (30), and the needle cylinder sleeve (30) is located at the tee input end (11).

6. The flush tube adapter for double-lumen venous catheters according to claim 5, characterized in that: the needle cylinder sleeve (30) is separably arranged with the tee joint (10), and one side of the needle cylinder sleeve (30) is provided with a bayonet (31) for clamping into the tee joint (10).

7. The flush tube adapter for double-lumen venous catheters according to claim 1, characterized in that: the infusion needle (22) is provided with a needle handle (23).

8. The flush tube adapter for double-lumen venous catheters according to claim 1, characterized in that: the length of the branch tube (20) is 15-25 cm.

Images