Medical connector

Abstract

This utility model discloses a medical connector, including a valve body, a protective cap, and a locking cap. The valve body has four through holes, which are respectively connected to a rear connecting pipe, a front connecting pipe, a left connecting pipe, and a right connecting pipe. The rear connecting pipe is connected to a second positive pressure infusion connector. A conversion valve is provided inside the valve body, which has a three-way hole and a two-way hole. The three-way hole can be aligned and connected to three ports located on the front, left, and right sides of the four through holes, respectively. The two-way hole can be aligned and connected to two ports located on the rear and right sides of the four through holes. The upper end of the conversion valve extends out of the valve body, and an expansion cavity is provided in the center of the three-way hole on the conversion valve. By providing a valve body, the left side of the valve body is connected to the first positive pressure infusion connector. Therefore, when chemotherapy and nutritional fluid are infused simultaneously, or when chemotherapy is pumped in separately after the nutritional fluid infusion is completed, there is no need to go back and forth to change the connector, which is simple and convenient, and can avoid drug leakage.

Description

Technical Field

[0001] This utility model belongs to the field of medical technology, and in particular relates to a medical connector. Background Technology

[0002] In medical hospitals, T-connectors are frequently used. In the existing technology, a search reveals a utility model patent with Chinese patent authorization announcement number CN204147422U that discloses a precision filtration medical T-connector, such as... Figure 1 As shown, it mainly includes a three-way body a, a switching valve b, and a connector c. The switching valve b is located in the center of the three-way body a. The three-way body is internally interconnected, and connector c is located on the left and right sides and the top. The right connector c is equipped with a protective cap d. The right connector and the protective cap are screwed into a locking cap e. The left connector and the top connector are equipped with screw caps f.

[0003] The existing connectors, similar to those described above, have room for improvement in their application in certain departments or treatment programs. For example, in chemotherapy departments, chemotherapy pumps are often used for continuous 48-hour infusions. A three-way connector is frequently used in this case, with one side for continuous infusion by the portable chemotherapy pump and the other for routine nutrition or medication infusion. After the routine nutrition or medication infusion is completed each day, medical staff need to disconnect the three-way connector and then reconnect the portable chemotherapy pump to the intravenous access. The next day, the three-way connector is reconnected for simultaneous infusion of the portable chemotherapy pump and the intravenous fluid. This repeated connection and disconnection process not only causes inconvenience and difficulty for nursing staff but also leads to the leakage of anti-tumor drugs, resulting in drug waste. Furthermore, the leaked anti-tumor drugs can contaminate the patient's skin and the nurse's hands, posing a risk of occupational exposure. Utility Model Content

[0004] In view of the shortcomings and defects in the existing technology, the purpose of this utility model is to provide a medical connector that solves the problem that existing medical connectors, when applied to chemotherapy departments, require the disassembly and replacement of the three-way connector when injecting chemotherapy and nutritional solutions or infusions. This process of disassembly and reassembly not only brings trouble and inconvenience to nursing work, but also causes the leakage of anti-tumor drugs, resulting in drug waste. In addition, the leaked anti-tumor drugs can contaminate the patient's skin and the nurse's hands, creating occupational exposure risks.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a medical connector, including a valve body, a threaded cap, a protective cap, and a locking cap. The valve body has a four-way hole, with the four openings located on the front, rear, left, and right sides of the valve body, respectively. The rear opening of the four-way hole is connected to a rear connecting pipe, the front opening of the four-way hole is connected to a front connecting pipe, the left opening of the four-way hole is connected to a left connecting pipe, and the right opening of the four-way hole is connected to a right connecting pipe. A threaded cap is connected to the front connecting pipe, a first positive pressure infusion connector is connected to the left connecting pipe, and a protective cap is connected to the right connecting pipe. A locking cap is screwed onto the protective cap. A second positive pressure infusion connector is connected to the rear connecting pipe. The valve body has a rotatable... The valve is a switching valve for both lifting and lowering. A three-way hole is located near the bottom of the valve, with its three openings aligned and connected to three openings on the front, left, and right sides of a four-way hole, respectively. Above the three-way hole, a two-way hole is located, with its two sides aligned and connected to two openings on the rear and right sides of the four-way hole, respectively. The upper end of the valve extends out of the valve body, and a knob is located at the upper end. A front protrusion, a rear protrusion, a left protrusion, and a right protrusion are sequentially located on the front, rear, left, and right sides of the knob. An expansion cavity is located in the center of the three-way hole on the valve. A sealing gasket is embedded in both the upper and lower ends of the valve body.

[0006] As a further improvement of this utility model, a dosing tube is fixed on the right connecting pipe. The dosing tube is gradually inclined from the end near the right connecting pipe to the end away from the right connecting pipe towards the side away from the valve body. The dosing tube is connected to the right connecting pipe.

[0007] As a further improvement of this utility model, the dosing tube and the right connecting tube are integrally manufactured.

[0008] As a further improvement of this utility model, a first mark is provided on the left protruding head and the left connecting pipe, a second mark is provided on the right protruding head and the right connecting pipe, a third mark is provided on the front protruding head and the front connecting pipe, and a fourth mark is provided on the rear protruding head and the rear connecting pipe.

[0009] As a further improvement of this utility model, the switching valve is provided with a first limiting plate at the lower end of the knob, the lower end of the switching valve extends out of the valve body and is connected to a second limiting plate, and the difference between the net distance between the first limiting plate and the second limiting plate and the length of the valve body is equal to the center distance between the two-way hole and the three-way hole.

[0010] As a further improvement of this utility model, the lower end of the valve body is provided with a cover plate, and the cover plate has a movable cavity to avoid interference with the movement and adjustment of the second limiting plate.

[0011] Compared with the prior art, this utility model has the following advantages: 1. By configuring a valve body with a four-way port, a rotatable and liftable switching valve is installed inside the valve body. The switching valve has a three-way port and a two-way port. The three-way port connects to the left connecting pipe, and the left connecting pipe connects to the first positive pressure infusion connector. Therefore, when chemotherapy pump and fluid infusion are performed simultaneously, the switching valve can be moved downwards and rotated so that the three-way port on the switching valve corresponds to the four-way port on the valve body. This allows the right connecting pipe of the valve body (i.e., the end directly connected to the human body) to connect simultaneously to the front connecting pipe and the left connecting pipe, thus enabling simultaneous infusion of chemotherapy solution and nutrient solution. When the nutrient solution infusion is completed but chemotherapy solution needs to be continuously pumped in, the nutrient solution infusion set can be directly disconnected from the first positive pressure infusion connector. Due to the positive pressure effect of the first positive pressure infusion connector, the first positive pressure infusion... The connector can directly seal the left connecting tube at the left end, avoiding the need to disassemble the T-connector and replace it with a single chemotherapy pump. When nutritional fluid infusion and chemotherapy pump infusion are needed again the next day, the infusion set can be directly connected to the first positive pressure infusion connector for simultaneous infusion of nutritional fluid and chemotherapy solution without having to replace it with the T-connector again. Moreover, due to the positive pressure sealing effect of the second positive pressure infusion connector, when reconnecting the infusion set, it can be directly disinfected with an alcohol swab, reducing the infiltration of external bacteria without disassembly for treatment. This avoids the trouble of repeatedly replacing connectors, making nursing work faster and more convenient. It also avoids the leakage of anti-tumor drugs, which would cause drug waste, and avoids the risk of occupational exposure caused by leaked anti-tumor drugs contaminating both the patient's skin and the nurse's hands.

[0012] Additionally, a rear connecting pipe is provided on the rear side of the valve body. The rear connecting pipe connects to the second positive pressure infusion connector, which in turn connects to the infusion set. The switching valve can be moved upwards and then rotated so that the two ports of the switching valve are connected to the rear connecting pipe and the right connecting pipe, respectively. Therefore, infusion of incompatible drugs, blood, etc. (which cannot be mixed with other drugs) can be performed through these two ports, improving functionality and application scenarios, and avoiding the need to replace the connectors back and forth. After the infusion of incompatible drugs is completed, the infusion set on the second positive pressure infusion connector can be directly removed. Because of the positive pressure effect of the second positive pressure infusion connector, the rear connecting pipe can be directly blocked, making it simpler and more convenient to use.

[0013] In addition, an expansion cavity is provided in the center of the three-way hole on the switching valve. The chemotherapy infusion solution and the nutrient solution are premixed and buffered in the expansion cavity before flowing into the connecting pipe on the right. The expansion effect of the expansion cavity can buffer the impact force when the chemotherapy infusion solution and the nutrient solution come into contact and mix, thereby reducing the vibration when the chemotherapy infusion solution and the nutrient solution are mixed and reducing the leakage of liquid at the joint caused by excessive pressure.

[0014] By embedding a sealing gasket at both the upper and lower ends of the valve body, the sealing effect of the joint itself is improved, preventing liquid leakage.

[0015] 2. By providing a first mark corresponding to the left protruding head and the left connecting pipe, a second mark corresponding to the right protruding head and the right connecting pipe, a third mark corresponding to the front protruding head and the front connecting pipe, and a fourth mark corresponding to the rear protruding head and the rear connecting pipe, each connecting pipe can be aligned with each protruding head above the knob. This facilitates operation of the steering valve from the outside based on the direction of the protruding heads. When the directions of each pair of corresponding marks are consistent, it indicates that the port on that side of the valve body is open; when the directions of each pair of corresponding marks are inconsistent, it indicates that the port on that side of the valve body is closed, thus facilitating operation.

[0016] 3. By fixing the medication tube to the right connecting tube, medication can be added through the medication tube when needed according to the patient's condition, avoiding the inconvenience of unplugging the original infusion set's spiral connector, injecting the medication, and then plugging the infusion set's spiral connector back on.

[0017] 4. By setting a first limiting plate at the upper end of the switching valve and a second limiting plate at the lower end of the switching valve, the difference between the net distance between the first limiting plate and the second limiting plate and the length of the valve body is equal to the center distance between the two-way hole and the three-way hole. Therefore, the switching valve can be moved downwards to the limit position, at which point the two-way hole reaches the designated position. The switching valve can be moved upwards to the limit position, at which point the three-way hole reaches the designated position. This facilitates the judgment of the corresponding operation of the switching valve and improves the accuracy of the opening and closing of each port. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the existing technology; Figure 2 This is a schematic diagram of the structure of this utility model; Figure 3 for Figure 2 Cross-sectional view at the tee hole; Figure 4 for Figure 2 Cross-sectional view at the two through holes; Figure 5 for Figure 2 Cross-sectional view at the four-way hole; In the diagram: 1. Valve body; 2. Protective cap; 3. Locking cap; 4. Four-way hole; 5. Rear connecting pipe; 6. Front connecting pipe; 7. Left connecting pipe; 8. Right connecting pipe; 9. Threaded cap; 10. First positive pressure infusion connector; 11. Second positive pressure infusion connector; 12. Diverter valve; 13. Two-way hole; 14. Knob; 15. Front protrusion; 16. Rear protrusion; 17. Left protrusion; 18. Right protrusion; 19. Expansion cavity; 20. Sealing gasket; 21. Dosing tube; 22. First limiting plate; 23. Second limiting plate; 24. Cover plate; 25. First mark; 26. Second mark; 27. Third mark; 28. Fourth mark; 29. ​​Three-way hole. Detailed Implementation

[0019] The following is in conjunction with the appendix Figure 2-4 The present invention will be described in further detail below. For clarity, only the structures relevant to the inventive features of the present invention are shown in the figures.

[0020] For ease of description, the coordinate system is defined as follows: Figure 2 As shown, the left and right directions are horizontal, the front and back directions are vertical, and the up and down directions are vertical.

[0021] This utility model discloses a medical connector. (Refer to...) Figure 2 , Figure 3 , Figure 4 and Figure 5 A medical connector includes a valve body 1, a threaded cap, a protective cap 2, and a locking cap 3. The valve body 1 has a four-way hole 4, with the four openings of the four-way hole 4 located on the front, rear, left, and right sides of the valve body 1, respectively. The rear opening of the four-way hole 4 is connected to a rear connecting pipe 5, the front opening of the four-way hole 4 is connected to a front connecting pipe 6, the left opening of the four-way hole 4 is connected to a left connecting pipe 7, and the right opening of the four-way hole 4 is connected to a right connecting pipe 8. A threaded cap 9 is threaded onto the front connecting pipe 6, a first infusion positive pressure connector 10 is threaded onto the left connecting pipe 7, and a protective cap 2 is fixedly connected to the right connecting pipe 8. The protective cap 2 has threads on its inner side, and a locking cap 3 is screwed into the threads of the protective cap 2. A second infusion positive pressure connector 11 is connected to the rear connecting pipe 5. The second infusion positive pressure connector 11 can be a standard second infusion positive pressure connector 11 in the prior art.

[0022] The valve body 1 contains a rotatable and height-adjustable switching valve 12. A cylindrical cavity is formed within the valve body 1, and the outer side of the switching valve 12 is cylindrical. The switching valve 12 is rotatably mounted within the cavity and can move up and down. Alternatively, the switching valve 12 can be threaded into the valve body 1, and by turning the switching valve 12, it can be raised or lowered, thereby positioning the three-way hole 29 and the two-way hole 13.

[0023] The switching valve 12 has a three-way hole 29 located near its lower part. The three openings of the three-way hole 29 can be aligned and connected to the three openings on the front, left, and right sides of the four-way hole 4, respectively. Above the three-way hole 29, the switching valve 12 has a two-way hole 13. The two sides of the two-way hole 13 can be aligned and connected to the two openings on the rear and right sides of the four-way hole 4, respectively. When the switching valve 12 is adjusted up and down, both the three-way hole 29 and the two-way hole 13 are inside the valve body 1. The upper end of the switching valve 12 extends out of the valve body 1, and a knob 14 is fixedly connected to the upper end of the switching valve 12. The front side of the knob 14... A front protrusion 15, a rear protrusion 16, a left protrusion 17, and a right protrusion 18 are fixedly connected to the rear, left, and right sides in sequence. An expansion cavity 19 is provided in the center of the three-way hole 29 on the switching valve 12. The outer dimension of the expansion cavity 19 is larger than the diameter of the opening on the front side of the three-way hole 29 and larger than the diameter of the opening on the left side of the three-way hole 29. A sealing gasket 20 is embedded in both the upper end and the lower end of the valve body 1. By embedding and fixing a sealing gasket 20 in both the upper end and the lower end of the valve body 1, the sealing effect of the joint itself is improved, and liquid leakage is prevented.

[0024] Furthermore, a medication delivery tube 21 is fixed to the right connecting tube 8. The right connecting tube 8 and the medication delivery tube 21 are integrally manufactured. The medication delivery tube 21 is gradually inclined from the end near the right connecting tube 8 to the end away from the right connecting tube 8, moving away from the valve body 1. The medication delivery tube 21 is connected to the right connecting tube 8, and a one-way valve is connected internally to the end of the medication delivery tube 21. Therefore, depending on the patient's condition at the time, medication can be directly added through the medication delivery tube 21 when needed, avoiding the inconvenience of unscrewing the spiral connector of the infusion set, injecting the medication, and then reconnecting it.

[0025] Furthermore, a first mark 25 is provided on the left protruding head 17 and the left connecting pipe 7, a second mark 26 is provided on the right protruding head 18 and the right connecting pipe 8, a third mark 27 is provided on the front protruding head 15 and the front connecting pipe 6, and a fourth mark 28 is provided on the rear protruding head 16 and the rear connecting pipe 5. The first mark 25, the second mark 26, the third mark 27, and the fourth mark 28 are all different and can be any form of marking, such as spraying color, engraving text, or pasting symbols. By providing a first mark 25 on the left protruding head 17 and the left connecting pipe 7, a second mark 26 on the right protruding head 18 and the right connecting pipe 8, a third mark 27 on the front protruding head 15 and the front connecting pipe 6, and a fourth mark 28 on the rear protruding head 16 and the rear connecting pipe 5, each connecting pipe can be aligned with each protruding head above the knob 14. This facilitates operation of the steering valve from the outside based on the direction of the protruding heads. When the directions of each pair of corresponding marks are consistent, it indicates that the port on that side of the valve body 1 is open; when the directions of each pair of corresponding marks are inconsistent, it indicates that the port on that side of the valve body 1 is closed, thus facilitating operation.

[0026] like Figure 2 As shown, a first limiting plate 22 is fixed to the lower end of the knob 14 on the switching valve 12. The lower end of the switching valve 12 extends out of the valve body 1 and connects to a second limiting plate 23. The difference between the net distance between the first limiting plate 22 and the second limiting plate 23 and the length of the valve body 1 is equal to the center distance between the two-way hole 13 and the three-way hole 29. With this setting, the switching valve 12 can be moved downwards to the limit position, at which point the two-way hole 13 reaches the designated position. When the switching valve 12 is moved upwards to the limit position, the three-way hole 29 reaches the designated position, facilitating the judgment of the corresponding operation of the switching valve 12 and improving the accuracy of the opening and closing of each port. In addition, a cover plate 24 can be fixed to the lower end of the valve body 1. The cover plate 24 has a movable cavity inside to avoid interference with the movement and adjustment of the second limiting plate 23. The cover plate 24 can also be integrally manufactured with the valve body 1.

[0027] This invention features a valve body 1 with a four-way hole 4. A rotatable and height-adjustable switching valve 12 is installed inside the valve body 1. The switching valve 12 has a three-way hole 29 and a two-way hole 13. The three-way hole 29 connects to a left connecting pipe 7, and the left connecting pipe 7 connects to a first positive pressure infusion connector 10. Therefore, when simultaneously administering chemotherapy and fluids, the switching valve 12 can be moved downwards and rotated so that the three-way hole 13 on the switching valve 12 aligns with the four-way hole 4 on the valve body. This allows the right connecting pipe 8 (the end directly connected to the body) of the valve body 1 to simultaneously connect with the front connecting pipe 6 and the left connecting pipe 10, enabling simultaneous infusion of chemotherapy and nutrient solutions. After the nutrient solution infusion is completed, but chemotherapy is still needed... When the intravenous fluid is continuously pumped in, the infusion set can be directly disconnected from the first positive pressure infusion connector 10. Due to the positive pressure of the first positive pressure connector 10, it can directly seal the left connecting tube at the left end, avoiding the need to disassemble the three-way connector and replace it with a single chemotherapy pump. When intravenous fluid and chemotherapy are needed again the next day, the infusion set can be directly reconnected to the first positive pressure infusion connector 10 for simultaneous infusion of both fluids without needing to replace it with the three-way connector again. Furthermore, due to the positive pressure sealing effect of the first positive pressure infusion connector 10, when reconnecting the infusion set, it can be disinfected directly with an alcohol swab, reducing the infiltration of external bacteria without disassembly. This avoids the hassle of repeatedly replacing connectors, making nursing work faster and more convenient, preventing the leakage of anti-tumor drugs and thus avoiding drug waste, as well as preventing the leakage of anti-tumor drugs from contaminating both the patient's and nurse's hands, thus avoiding occupational exposure risks.

[0028] Additionally, a rear connecting pipe 5 is provided on the rear side of the valve body 1. The rear connecting pipe 5 is connected to the second positive pressure infusion connector 11, which is connected to the infusion set. The switching valve 12 can be moved upward and then rotated so that the two-way holes of the switching valve 12 are connected to the rear connecting pipe 5 and the right connecting pipe 8 respectively. Therefore, infusion of incompatible drugs can be performed through these two-way holes, improving functionality and application scenarios, and avoiding the need to replace the connectors back and forth. After the infusion of incompatible drugs is completed, the infusion set on the second positive pressure infusion connector can be directly removed. Because of the positive pressure effect of the second positive pressure infusion connector, the rear connecting pipe can be directly blocked, making it simpler and more convenient to use.

[0029] Furthermore, an expansion cavity 19 is provided in the center of the three-way hole 29 on the switching valve 12. The chemotherapy infusion solution and the nutrient solution are premixed and buffered in the expansion cavity 19 before flowing into the connecting pipe on the right side. The expansion effect of the expansion cavity 19 can buffer the impact force when the chemotherapy infusion solution and the nutrient solution come into contact and mix, thereby reducing the vibration when the chemotherapy infusion solution and the nutrient solution are mixed and reducing the leakage of liquid at the joint caused by excessive pressure. It can also reduce the impact of pressure difference on the pumped liquid on both sides.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. It should be understood that the specific embodiments described herein are only for understanding this utility model and are not intended to limit this utility model. All other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this utility model.

Claims

1. A medical connector comprising a valve body, a protective cap and a locking cap, characterized in that: The valve body has four through holes, with the four openings located on the front, rear, left, and right sides of the valve body, respectively. The rear opening of the four through holes connects to the rear connecting pipe, the front opening connects to the front connecting pipe, the left opening connects to the left connecting pipe, and the right opening connects to the right connecting pipe. A threaded cap is attached to the front connecting pipe, a first positive pressure infusion connector is attached to the left connecting pipe, and a protective cap is attached to the right connecting pipe. A locking cap is screwed onto the protective cap. A second positive pressure infusion connector is attached to the rear connecting pipe. Inside the valve body, there is a rotatable and liftable switching valve. Near the bottom of the switching valve, there is a... The three-way hole has three openings that can be aligned and connected to the three openings on the front, left, and right sides of the four-way hole, respectively. The switching valve has a two-way hole above the three-way hole, and the two sides of the two-way hole can be aligned and connected to the two openings on the rear and right sides of the four-way hole, respectively. The upper end of the switching valve extends out of the valve body, and a knob is provided at the upper end of the switching valve. The front, rear, left, and right sides of the knob are provided with a front protrusion, a rear protrusion, a left protrusion, and a right protrusion, respectively. An expansion cavity is provided in the center of the three-way hole on the switching valve. A sealing gasket is embedded in both the upper and lower ends of the valve body.

2. A medical connector according to claim 1, characterized in that: A dosing tube is fixed on the right connecting pipe. The dosing tube is inclined from the end near the right connecting pipe to the end away from the right connecting pipe, and the dosing tube is connected to the right connecting pipe.

3. A medical connector according to claim 2, characterized in that: The dosing tube and the right connecting tube are manufactured as a single unit.

4. A medical connector according to claim 1, characterized in that: A first mark is provided on the left protruding head and the left connecting pipe, a second mark is provided on the right protruding head and the right connecting pipe, a third mark is provided on the front protruding head and the front connecting pipe, and a fourth mark is provided on the rear protruding head and the rear connecting pipe.

5. A medical connector according to claim 1, characterized in that: The switching valve has a first limiting plate at the lower end of the knob, and the lower end of the switching valve extends out of the valve body and is connected to a second limiting plate. The difference between the net distance between the first limiting plate and the second limiting plate and the length of the valve body is equal to the center distance between the two-way hole and the three-way hole.

6. A medical connector according to claim 5, characterized in that: The lower end of the valve body is provided with a cover plate, and the cover plate has a movable cavity to avoid interference with the movement and adjustment of the second limiting plate.

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