Anti-backflow tee joint special for artery indwelling catheter

Abstract

The utility model discloses a special anti-backflow type tee joint for an artery indwelling catheter, which comprises an adjusting valve, an adjusting valve fixing port, a first infusion port, a second infusion port, a main infusion port, an anti-backflow device and a fixing sleeve, the first infusion opening is formed in one end of the adjusting valve fixing opening and connected to a horizontal through hole in one end of the adjusting valve fixing opening, the second infusion opening is located in one side of the adjusting valve fixing opening and connected to a middle section through hole of the adjusting valve fixing opening, and a horizontal through hole in the other end of the adjusting valve fixing opening is connected with a main infusion opening. The anti-reflux device is connected to the interior of the main infusion opening in the length direction of the main infusion opening, and the fixing sleeve is connected to the main infusion opening in a sliding mode, through the arranged anti-reflux device, liquid medicine leakage and blood reflux are remarkably reduced, and the safety of arterial duct infusion is guaranteed; and the treatment accuracy and efficiency are improved through the specially designed adjusting valve and fixing sleeve.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to an anti-reflux type three-way joint specially used for arterial indwelling catheters. Background Art

[0002] The infusion tee currently used in clinical practice can allow multiple liquids to enter the patient's body simultaneously or alternately for drug treatment. During the treatment process, many patients rely on various arterial catheters for drug treatment. However, during this process, if the patient's activities or incorrect operations cause the knob of the infusion tee to be inaccurately positioned, or the tee interface becomes loose, it may cause serious consequences such as drug leakage, blood reflux, and even arterial bleeding if the nursing staff is too busy to discover it in time.

[0003] Chinese patent publication number CN216496833U discloses a similar improved infusion three-way valve, including a three-way valve body, an anti-dropping docking device is provided at the port of the three-way valve body, the three-way valve body includes a first liquid passage pipe, second liquid passage pipes are provided on both sides of the first liquid passage pipe, and a closing component is provided at the port of the second liquid passage pipe.

[0004] Although the above device solves the problem of the three-way interface being easily loose, when the drug pump speed is too slow or the device sags, the risk of blood return will increase, which is not conducive to treatment. Utility Model Content

[0005] The utility model aims to overcome the disadvantages of the prior art that when the liquid medicine pump speed is too slow or the device sags, the risk of blood return increases, which is not conducive to treatment.

[0006] A special anti-reflux tee for arterial indwelling catheter is proposed, comprising a regulating valve for adjusting the flow of drug solution, a regulating valve fixing port for fixing the regulating valve, a first infusion port for infusion, a second infusion port for infusion, a total infusion port for converging drug solution, an anti-reflux device for preventing the backflow of drug solution and a fixing sleeve for fixing an infusion tube, wherein the regulating valve is vertically rotatably connected to the inside of the regulating valve fixing port, the first infusion port is arranged at one end of the regulating valve fixing port and connected to a horizontal through hole at one end of the regulating valve fixing port, the second infusion port is located at one side of the regulating valve fixing port and connected to a middle through hole of the regulating valve fixing port, the total infusion port is connected to the horizontal through hole at the other end of the regulating valve fixing port, the anti-reflux device is connected to the inside of the total infusion port along the length direction of the total infusion port, and the fixing sleeve is slidably connected to the total infusion port.

[0007] In the technical scheme of the utility model, the blocking plug is respectively fixed on the upper and lower inner walls of the square tube and is in a triangular shape. Under normal infusion conditions, the blocking plug can prevent the anti-reflux valve from sticking to the inner wall of the main infusion port under the action of the medicine. Therefore, when the medicine flows back, the backflowing medicine will lift the anti-reflux valve and allow the anti-reflux valve to stick tightly to the anti-reflux plug. In this way, the anti-reflux valve forms a seal on the flow channel inside the square tube to prevent the medicine from continuing to flow back, thereby avoiding serious consequences such as medicine leakage, blood reflux and even arterial hemorrhage caused by loose three-way interface or inaccurate positioning of the three-way knob. It is used to solve the disadvantage mentioned in the technical background that when the medicine pump speed is too slow or the device sags, the risk of blood return will increase, which is not conducive to treatment.

[0008] Preferably, the structures of the first infusion port and the second infusion port are completely consistent, and an external thread is provided at the interface between the first infusion port and the second infusion port. The external thread is used to connect and fix with other medical infusion straps and extension tubes, and its function is to provide assistance for patients who need to infuse two kinds of incompatible drugs at the same time.

[0009] Preferably, the interior of the fixing sleeve is provided with an internal thread, and the infusion tube can be fixed by the internal thread inside the fixing sleeve after being connected to the main infusion port, so as to avoid leakage of the medicine due to a gap at the interface between the infusion tube and the main infusion port.

[0010] The preferred technical solution of the utility model is that the anti-backflow device includes a partition, an anti-reflux bolt, an anti-reflux valve, a blocking bolt, an arched fixing buckle, a square tube and a retaining ring. The partition is horizontally connected to the center of the square tube. There are two groups of anti-reflux bolts, which are respectively connected to the middle position of the upper and lower surfaces of the partition and the two groups of anti-reflux bolts are perpendicular to each other. There are two groups of anti-reflux valves, which are respectively located on one side of the two groups of anti-reflux bolts. The two groups of anti-reflux valves are connected to the inner wall of the square tube. There are also two groups of blocking bolts, which are respectively located at On the other side of the two groups of anti-reflux valves, the two groups of blocking bolts are also connected to the inner wall of the square tube. There are four groups of arch fixing buckles and they are respectively connected to the four outer surfaces of the square tube. The retaining ring is located at one end of the square tube and connected to the square tube. The retaining ring is arranged inside the main infusion port, and the diameter of the retaining ring is the same as the inner diameter of the main infusion port. Therefore, when the retaining ring is placed inside the main infusion port, the retaining ring will seal the main infusion port, so that the liquid medicine inside the main infusion port can only flow through the flow channel inside the square tube.

[0011] Preferably, the retaining ring is made of rubber, which has good stability and corrosion resistance and is not easily corroded by strong acids and alkalis. Therefore, it will not be corroded by the drug solution when used for a long time.

[0012] In a preferred embodiment of the technical solution of the utility model, the regulating valve includes a cylindrical latch and a star-shaped regulating handle. The cylindrical latch is vertically rotatably connected in a fixing port of the regulating valve. The star-shaped regulating handle is located at the top of the cylindrical latch and connected to the cylindrical latch. The cylindrical latch is fixed in the fixing port of the regulating valve and has three small holes thereon. The directions of the small holes are respectively consistent with the directions of the first infusion port, the second infusion port, and the total infusion port; the star-shaped regulating handle is fixed on the cylindrical latch, and the directions of the three star-shaped handles are respectively consistent with the directions of the first infusion port, the second infusion port, and the total infusion port for ease of adjustment by the operator.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. Design of integrated anti-reflux infusion port: This includes the specific arrangement and design of the diaphragm, anti-reflux plug, anti-reflux valve, blocking plug and main infusion port. The combined use of these components innovatively achieves the function of preventing arterial blood reflux;

[0015] 2. Dual anti-reflux mechanism: The design and layout of the anti-reflux plug and the anti-reflux valve, especially how they interact with each other to close the infusion port and prevent the backflow of blood and liquid medicine when arterial blood refluxes, is a unique innovation;

[0016] 3. Overall integrated three-way structure: The vertical layout of the first infusion port, the second infusion port and the integrated anti-reflux infusion port and their integrated structure formed around the fixed port of the regulating valve provide an innovative way to infuse multiple liquids simultaneously or alternately while maintaining the stability and anti-reflux capability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a three-dimensional structure of an anti-reflux three-way special for arterial indwelling catheter;

[0018] Figure 2 It is a rear view structural diagram of an anti-reflux three-way device specially used for arterial indwelling catheter;

[0019] Figure 3 A schematic diagram of the internal structure of an anti-reflux tee for arterial indwelling catheter (the total infusion port is a whole, and a piece is removed to show the internal structure.);

[0020] Figure 4 It is a schematic diagram of the structure of an anti-reflux three-way regulating valve specially used for arterial indwelling catheter;

[0021] Figure 5 It is a schematic diagram of the structure of an anti-reflux device of an anti-reflux type three-way dedicated to arterial indwelling catheter;

[0022] Figure 6A schematic diagram of the internal structure of an anti-reflux device for an anti-reflux three-way arterial catheter (the square tube is a whole, and a piece is removed to show the internal structure.);

[0023] Figure 7 A schematic diagram of the main view of an anti-reflux device for an anti-reflux three-way arterial catheter (the square tube is a whole, and a piece is removed to show the internal structure.);

[0024] Figure 8 A right view schematic diagram of an anti-reflux device for an anti-reflux three-way arterial catheter (the square tube is a whole, and a piece is removed to show the internal structure.);

[0025] Fig. 9 A left-side schematic diagram of an anti-reflux device for an anti-reflux three-way arterial catheter (the square tube is a whole, and a piece is removed to show the internal structure.);

[0026] In the figure: 1- regulating valve, 11- columnar latch, 12- star-shaped regulating handle, 2- regulating valve fixing port, 3- first infusion port, 4- second infusion port, 5- total infusion port, 6- anti-backflow device, 61- partition, 62- anti-reflux plug, 63- anti-reflux valve, 64- blocking plug, 65- arch fixing buckle, 66- square tube, 67- retaining ring, 7- fixing sleeve. DETAILED DESCRIPTION

[0027] The following will be combined with the attached embodiment of the present utility model Figure 1-9 , the technical solutions in the embodiments of the utility model are described in detail.

[0028] like Figure 1-3 As shown, an anti-reflux tee for arterial indwelling catheter comprises a regulating valve 1 for adjusting the flow rate of liquid medicine, a regulating valve fixing port 2 for fixing the regulating valve 1, a first infusion port 3 for infusion, a second infusion port 4 for infusion, a total infusion port 5 for converging liquid medicine, an anti-reflux device 6 for preventing the backflow of liquid medicine and a fixing sleeve 7 for fixing the infusion tube. The regulating valve 1 is vertically rotatably connected to the inside of the regulating valve fixing port 2, so the regulating valve 1 can be rotated according to the use requirements when needed, and the liquid medicine flow rate inside the total infusion port 5 is adjusted by the regulating valve 1. The first infusion port 3 is arranged at one end of the regulating valve fixing port 2 and connected to the horizontal through hole at one end of the regulating valve fixing port 2. An external thread is provided at the interface of the first infusion port 3. Therefore, when the first infusion port 3 is connected to the infusion tube, the infusion tube can be connected to the first infusion port 3 through the external thread. The second infusion port 4 is located on one side of the regulating valve fixing port 2 and connected to the middle through hole of the regulating valve fixing port 2. The interface of the second infusion port 4 is also provided with an external thread.

[0029] like Figure 1-3As shown, when the second infusion port 4 is connected to the infusion tube, the infusion tube can also be connected through the external thread. The main infusion port 5 is connected to the horizontal through hole at the other end of the regulating valve fixed port 2. The medicinal liquid input through the first infusion port 3 and the second infusion port 4 can be input into the human body after converging through the main infusion port 5. The anti-backflow device 6 is connected to the inside of the main infusion port 5 according to the length direction of the main infusion port 5. The medicinal liquid after converging through the main infusion tube will pass through the anti-backflow device 6 and enter the human body. Similarly, when the medicinal liquid backflows, the anti-backflow device 6 will also prevent the medicinal liquid from continuing to backflow. The fixed sleeve 7 is slidably connected to the main infusion port 5. When the main infusion port 5 is connected to the infusion tube, the fixed sleeve 7 can be slid laterally in the direction of the regulating valve fixed port 2. After the main infusion port 5 is connected to the infusion tube, the fixed sleeve 7 can be slid laterally in the direction of the infusion tube, and the infusion tube can be fixed by the thread inside the fixed sleeve 7.

[0030] like Figure 4 As shown, the regulating valve 1 includes a columnar latch 11 and a star-shaped regulating handle 12. The columnar latch 11 is vertically rotatably connected to the regulating valve fixing port 2. The star-shaped regulating handle 12 is located at the top of the columnar latch 11 and is connected to the columnar latch 11. Therefore, when the star-shaped regulating handle 12 is manually rotated, the star-shaped regulating handle 12 will drive the columnar latch 11 to rotate together. The columnar latch 11 is arranged in the regulating valve fixing port 2 and three small holes are also arranged inside the columnar latch 11. The three small holes of the columnar latch 11 are connected inside the columnar latch 11, and the three small holes are connected to each other. The directions of the star-shaped adjusting handle 12 are respectively consistent with the directions of the first infusion port 3, the second infusion port 4, and the total infusion port 5. Therefore, the medicine flowing into the first infusion port 3 and the second infusion port 4 through the infusion tube will flow into the interior of the total infusion tube through the small opening on the columnar plug 11. The star-shaped adjusting handle 12 is fixedly connected to the columnar plug 11, and the directions indicated by the star-shaped adjusting handle 12 point to the first infusion port 3, the second infusion port 4, and the total infusion port 5 respectively. Therefore, when in use, the medical staff can rotate the star-shaped adjusting handle 12 according to the direction to adjust the flow rate of the medicine inside the total infusion tube.

[0031] like Figure 5-9As shown, the anti-reflux device 6 includes a partition 61, an anti-reflux plug 62, an anti-reflux valve 63, a blocking plug 64, an arch fixing buckle 65, a square tube 66 and a retaining ring 67. The partition 61 is horizontally connected to the center of the square tube 66. When the liquid medicine flows into the inside of the square tube 66, it will be diverted by the partition 61. After being diverted by the partition 61, the liquid medicine will flow to the upper and lower sides of the partition 61 respectively to avoid excessive pressure of the anti-reflux valve 63 causing liquid medicine leakage. The anti-reflux plug 62 has two groups of groups connected to the upper and lower surfaces of the partition 61 respectively. The two groups of anti-reflux plugs 62 are located in the middle position of the surface and are perpendicular to each other. When the medicine flows back, the anti-reflux valve 63 will apply a thrust to the anti-reflux valve 63. When the anti-reflux valve 63 is subjected to force, it will take the connection point between the anti-reflux valve 63 and the square tube 66 as the center of the circle and start to rotate in the direction of the reverse flow of the medicine until the anti-reflux valve 63 rotates to the position of the anti-reflux plug 62, and then the anti-reflux valve 63 will be squeezed on the anti-reflux plug 62 by the reverse flow of the medicine, and at the same time, the anti-reflux valve 63 will also seal the flow channel inside the square tube 66 to prevent the medicine from continuing to flow back.

[0032] like Figure 5-9 As shown, there are two groups of anti-reflux valves 63, which are respectively located on one side of the two groups of anti-reflux plugs 62. The two groups of anti-reflux valves 63 are connected to the inner wall of the square tube 66. Therefore, when the liquid medicine flows, the anti-reflux valves 63 will follow the flow direction of the liquid medicine and rotate with the connection point between the anti-reflux valves 63 and the square tube 66 as the center of the circle and the flow direction of the liquid medicine as the rotation direction. The blocking plugs 64 are also provided with two groups and are respectively located on the other side of the two groups of anti-reflux valves 63. The two groups of blocking plugs 64 are also connected to the inner wall of the square tube 66. When the liquid medicine is input into the human body, During the process, the medicine will continue to squeeze the anti-reflux valve 63 onto the blocking plug 64, and will not directly squeeze the anti-reflux valve 63 onto the inner wall of the square tube 66. Therefore, when the medicine flows back, the backflowing medicine can easily lift up the anti-reflux valve 63. At the same time, due to the support of the anti-reflux plug 62, there will be no situation where the anti-reflux valve 63 cannot be lifted up by the backflowing medicine. There are four groups of arch fixing buckles 65, which are respectively connected to the four outer surfaces of the square tube 66. There are multiple groups of slide grooves on the inner wall of the main infusion tube, and each group of slide grooves corresponds to a group of arch fixing buckles 65.

[0033] like Figure 5-9As shown, if you want to place the square tube 66 inside the main infusion tube, you can guide the square tube 66 and the retaining ring 67 to the specified position inside the main infusion tube after the slide groove is guided. The end of each set of slide grooves on the main infusion tube is also provided with a slot. When the square tube 66 enters the interior of the main infusion tube through the slide groove and moves to the end part of the slide groove, you only need to rotate the square tube 66 and rotate the four sets of arched fixing buckles 65 on the square tube 66 into the slots at the end part of the slide groove, and then the square tube 66 can be fixed by the arched fixing buckle. 65 fixes the position of the square tube 66 inside the main infusion tube, the retaining ring 67 is located at one end of the square tube 66 and is connected to the square tube 66, and when the square tube 66 moves laterally inside the main infusion tube, it will drive the retaining ring 67 to move synchronously, and the diameter of the retaining ring 67 is the same as the inner diameter of the main infusion port 5. Therefore, when the retaining ring 67 is placed inside the main infusion port 5, the retaining ring 67 will seal the main infusion port 5, so that the liquid medicine inside the main infusion port 5 can only flow through the flow channel inside the square tube 66.

[0034] The movement process of this embodiment is as follows: during infusion, the infusion tube can be first connected to the first infusion port 3 and the second infusion port 4 through the external thread of the interface between the first infusion port 3 and the second infusion port 4, and then the fixing sleeve 7 is slid toward the direction of the outlet of the total infusion port 5 and the fixing sleeve 7 is rotated. After the infusion tube and the total infusion port 5 are fixed by the internal thread inside the fixing sleeve 7, the star-shaped adjustment handle 12 is rotated, and the columnar plug 11 is driven to rotate by the star-shaped adjustment handle 12 and ensure that the three small holes on the columnar plug 11 are aligned with the first infusion port 3, the second infusion port 4 and the total infusion port 5, and then the liquid medicine inside the infusion tube is input into the interior of the total infusion port 5 through the first infusion port 3 and the second infusion port 4, and after converging inside the total infusion port 5, it will pass through the anti-backflow device 6 again to enter the interior of the infusion tube at the total infusion port 5.

[0035] When the drug liquid enters the human body through the infusion tube at the main infusion tube, the drug liquid will drive the anti-reflux valve 63 to rotate forward until the anti-reflux valve 63 is rotated to the blocking plug 64. When the drug liquid flows back, the backflowing drug liquid will drive the anti-reflux valve 63 to rotate in the opposite direction until the anti-reflux valve 63 is rotated to the anti-reflux plug 62. When the anti-reflux valve 63 rotates to the anti-reflux plug 62, the anti-reflux valve 63 will use itself to seal the flow channel inside the square tube 66 to prevent the backflow of the drug liquid from flowing back into the infusion tube at the joint of the first infusion port 3 and the second infusion port 4 through the small hole inside the columnar pin 11.

[0036] The above embodiments are only for illustrating the technical idea of ​​the present utility model, and cannot be used to limit the protection scope of the present utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present utility model shall fall within the protection scope of the present utility model.

Claims

1. An anti-reflux tee for arterial indwelling catheter, characterized by: The invention comprises a regulating valve (1) for adjusting the flow rate of a medicinal liquid, a regulating valve fixing port (2) for fixing the regulating valve (1), a first infusion port (3) for infusion, a second infusion port (4) for infusion, a total infusion port (5) for converging medicinal liquids, an anti-backflow device (6) for preventing the backflow of the medicinal liquids, and a fixing sleeve (7) for fixing an infusion tube, wherein the regulating valve (1) is vertically rotatably connected to the inside of the regulating valve fixing port (2), the first infusion port (3) is arranged at one end of the regulating valve fixing port (2) and connected to a horizontal through hole at one end of the regulating valve fixing port (2), the second infusion port (4) is located at one side of the regulating valve fixing port (2) and connected to a middle through hole of the regulating valve fixing port (2), the total infusion port (5) is connected to the horizontal through hole at the other end of the regulating valve fixing port (2), the anti-backflow device (6) is connected to the inside of the total infusion port (5) along the length direction of the total infusion port (5), and the fixing sleeve (7) is slidably connected to the total infusion port (5).

2. The anti-reflux tee for arterial indwelling catheter according to claim 1, characterized in that: The first infusion port (3) and the second infusion port (4) have completely identical structures, and a thread is provided at the interface between the first infusion port (3) and the second infusion port (4).

3. The anti-reflux tee for arterial indwelling catheter according to claim 1, characterized in that: The interior of the fixing sleeve (7) is provided with an internal thread.

4. The anti-reflux tee for arterial indwelling catheter according to claim 1, characterized in that: The anti-reflux device (6) comprises a partition (61), an anti-reflux plug (62), an anti-reflux valve (63), a blocking plug (64), an arch fixing buckle (65), a square tube (66) and a retaining ring (67); the partition (61) is transversely connected to the center of the square tube (66); the anti-reflux plug (62) has two groups connected to the middle positions of the upper and lower surfaces of the partition (61) respectively, and the two groups of anti-reflux plugs (62) are perpendicular to each other; the anti-reflux valve (63) has two groups and is located at the two groups respectively. On one side of the anti-reflux plug (62), two groups of anti-reflux valves (63) are connected to the inner wall of the square tube (66), two groups of blocking plugs (64) are also provided and are respectively located on the other side of the two groups of anti-reflux valves (63), and the two groups of blocking plugs (64) are also connected to the inner wall of the square tube (66), there are four groups of arch fixing buckles (65) and are respectively connected to the four outer surfaces of the square tube (66), and the retaining ring (67) is located at one end of the square tube (66) and connected to the square tube (66).

5. The anti-reflux tee for arterial indwelling catheter according to claim 4, characterized in that: The retaining ring (67) is made of rubber.

6. The anti-reflux tee for arterial indwelling catheter according to claim 1, characterized in that: The regulating valve (1) comprises a columnar latch (11) and a star-shaped regulating handle (12); the columnar latch (11) is vertically rotatably connected in a regulating valve fixing port (2); and the star-shaped regulating handle (12) is located at the top of the columnar latch (11) and is connected to the columnar latch (11).

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