Assembled central venous catheter

Abstract

The invention relates to the technical field of medical instruments, in particular to an assembled central venous catheter which comprises a venous catheter body, a first combined bin and a second combined bin, the first combined bin and the second combined bin are in interference fit, the assembled central venous catheter further comprises two isolation plates, and the two isolation plates are rotationally arranged in the first combined bin and the second combined bin respectively; when the assembled central venous catheter is used, the pulse type flushing pipe can form small vortexes in the catheter in a pushing-stopping-pushing mode, the vortex effect is beneficial to effectively flushing impurities such as residual liquid medicine and blood attachments attached to the inner wall of the catheter and the blood vessel wall, and therefore the assembled central venous catheter is convenient to use. Compared with a traditional continuous push injection type washing pipe, the pulse type washing pipe can clean the interior of the catheter more deeply, residue accumulation is reduced, and therefore the risk of catheter blockage is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to an assembled central venous catheter. Background Art

[0002] Central venous catheters are key medical tools for delivering drugs to patients, and their operation procedures require rigorous and efficient procedures. During use, medical staff first accurately insert the end of the catheter into the patient's blood vessel, and then connect the syringe needle loaded with drugs to the first port of the catheter. By pushing the piston of the syringe, the drug passes through the first port of the catheter, the catheter body, and finally the end of the catheter under pressure, and finally enters the patient's blood vessel to achieve the treatment purpose.

[0003] After the drug treatment is completed, in order to ensure that all drugs have been delivered to the patient's body without any residue, medical staff need to flush the central venous catheter with a syringe filled with saline. However, this flushing process is highly dependent on the professional skills and practical operation experience of medical staff. If the operator is not skilled or inexperienced, not only may the flushing effect be unsatisfactory, but there is also a risk of damaging the catheter. More importantly, the manual flushing method is difficult to ensure the consistency and accuracy of each operation. There may be differences in operation between different operators, or even when the same operator performs flushing at different times. This inconsistency will directly affect the flushing effect, and may have an adverse effect on the patient's treatment. For this reason, we propose an assembled central venous catheter. Summary of the invention

[0004] One of the technical problems to be solved by the present application is that it is difficult to ensure the consistency and accuracy of each operation using a manual flushing method. There may be operational differences between different operators, or even when the same operator performs flushing at different times. This inconsistency will directly affect the flushing effect. To solve the above technical problems, an embodiment of the present application provides an assembled central venous catheter, comprising a venous tube body, a combination chamber 1 and a combination chamber 2, and the combination chamber 1 and the combination chamber 2 are interference fit, and also comprising an isolation plate, two isolation plates are provided, and the two isolation plates are rotatably arranged in the combination chamber 1 and the combination chamber 2 respectively; a temporary storage chamber, the temporary storage chamber is installed in the combination chamber 2; a docking drive unit, a plurality of the docking drive units are provided, and the plurality of docking drive units are respectively arranged on the combination chamber 1 and the combination chamber 2, and the docking drive unit is used to drive the isolation plate to rotate, so that the two venous catheters are connected during assembly and are sealed separately during disassembly; a pulse-type flushing unit, the pulse-type flushing unit is arranged on the combination chamber 2, and the pulse-type flushing unit is connected to the temporary storage chamber, and the pulse-type flushing unit is used to drive the physiological saline in the temporary storage chamber into the central venous catheter in a "push-stop-push" manner, thereby forming a small vortex in the catheter to clean the residual medicine and blood attachments attached to the catheter.

[0005] In some embodiments, the docking drive unit includes a closing piece arranged on combination chamber one and combination chamber two, and the closing piece is used to seal combination chamber one and combination chamber two. Combination chamber one and combination chamber two are provided with a rotating piece, and the isolation plate is driven to rotate by the rotating piece. Combination chamber one and combination chamber two are provided with a reset piece, and the isolation plate is reset by the reset piece.

[0006] In some embodiments, the closing component includes a docking chamber arranged on an isolation plate, the docking chamber is connected to the interior of combination chamber one and combination chamber two, a fixing plate is arranged on combination chamber one and combination chamber two, the fixing plate is a semicircular plate, a sealing gasket is arranged on the side of the fixing plate in contact with the docking chamber, and a sealing ring is arranged on the docking chamber.

[0007] In some embodiments, the rotating member includes a through slot opened on the isolation plate, a driving shaft is slidably arranged in the through slot, a spiral groove is opened on the driving shaft, and a push rod is arranged in the through slot and slidably connected to the spiral groove.

[0008] In some embodiments, the reset member includes an extension rod arranged in combination bin one and combination bin two, a reset bin is arranged on the extension rod, the reset bin is rotatably connected to the isolation plate, a docking plate is slidably arranged in the reset bin, the docking plate is connected to the push shaft, a reset spring is arranged on the docking plate, and one end of the reset spring is connected to the reset bin.

[0009] In some embodiments, the pulse-type flushing unit includes a liquid supply component disposed in combination chamber two, which is used to provide physiological saline to the temporary storage chamber. The temporary storage chamber is provided with a discharge component, which is used to deliver the physiological saline in the temporary storage chamber into the central venous catheter in a 'push-stop-push' manner. A switching component is provided on combination chamber two, which is used to drive the central venous tube to switch between drug delivery and flushing.

[0010] In some embodiments, the liquid supply component includes a separation plate arranged in the combination bin two, a mounting plate is arranged in the combination bin two, the mounting plate is connected with the temporary storage bin, a liquid supply pipe is arranged on the separation plate, and the liquid supply pipe passes through the mounting plate and is connected with the temporary storage bin.

[0011] In some embodiments, the discharge member includes a multi-stage telescopic rod 1 arranged in the temporary storage bin, the multi-stage telescopic rod 1 is provided with a piston plate slidably connected to the temporary storage bin, the piston plate and the multi-stage telescopic rod are sleeved with an extrusion spring, the temporary storage bin is provided with a connecting bin, a sealing block is slidably arranged in the connecting bin, a rubber ring is provided on the sealing block, the sealing block and the rubber ring are slidably connected to the connecting bin, a multi-stage telescopic rod 2 is provided on the piston plate, one end of the multi-stage telescopic rod 2 is connected to the sealing block, a guide groove is provided on the sealing block, the guide groove is connected to the temporary storage bin, the connecting bin is provided with a discharge groove used in conjunction with the guide groove, and an air vent is provided on the end of the temporary storage bin away from the combined bin.

[0012] In some embodiments, the switching member includes a positioning plate arranged on the combination warehouse two, a rotating shaft is arranged on the positioning plate, a winding wheel is arranged on the rotating shaft, a traction rope is arranged on the winding wheel, the traction rope passes through the combination warehouse two and the temporary storage warehouse and is connected with the piston plate, and the traction rope is movably connected with the combination warehouse two and the temporary storage warehouse, a guide plate is arranged on the separation plate, the traction rope passes through the guide plate, a fixed warehouse is arranged on the combination warehouse two, the fixed warehouse is rotatably connected with the rotating shaft, a fixed groove is opened on the fixed warehouse, a rotating block is arranged on the rotating shaft, and a positioning rod used in conjunction with the fixed groove is arranged on the rotating block.

[0013] In some embodiments, a sealing cap is provided on the combination chamber 1 and the combination chamber 2, and a disinfection sponge is provided inside the sealing cap.

[0014] The present invention has at least the following beneficial effects: Efficient cleaning of residues: Pulse-type flushing can form a small vortex in the catheter through the "push-stop-push" method. This vortex effect helps to effectively flush out impurities such as residual drug solution and blood attachments attached to the inner wall of the catheter and the blood vessel wall. Compared with the traditional continuous push-in flushing, pulse-type flushing can clean the inside of the catheter more deeply, reduce the accumulation of residues, and thus reduce the risk of catheter blockage; Reduce the risk of infection: Residual liquid medicine and blood attachments are hotbeds for bacterial growth. Regular use of pulse flushing to clean can effectively reduce the accumulation of these pollutants, thereby reducing the risk of catheter-related infection. Pulse flushing can also help remove microbial film in the catheter, which is one of the important measures to prevent catheter infection. Improve operational convenience: Through the automatic control of the drive unit, the assembly and disassembly process of the intravenous catheter can be simplified, reducing the manual operation of medical staff and improving work efficiency. The design of the rotating isolation plate makes the connection and disconnection process more intuitive and easy to understand, reducing the difficulty of operation; Enhanced sealing performance: When disassembled, the isolation plate rotates to the sealing position to ensure that the intravenous catheters are independent and well sealed, preventing liquid leakage or air entry, ensuring patient safety. The improved sealing performance also helps reduce the risk of infection caused by poor sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the combined chamber 1 and the combined chamber 2 of the present invention; Figure 3 This is a schematic diagram of the structure of the docking drive unit of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of explosion structure; Figure 5 It is a schematic diagram of the structure of the rotating part of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of explosion structure; Figure 7 This is a schematic diagram of the structure of the pulse pipe flushing unit of the present invention; Figure 8 For the present invention Figure 7 Schematic diagram of the cross-section structure; Fig. 9 This is a schematic diagram of the explosion structure of the discharge member of the present invention; Fig.10 This is a schematic diagram of the structure of the connecting bin and the blocking block of the present invention; Fig.11 This is a structural diagram of Embodiment 2 of the present invention; Fig.12It is a schematic diagram of the sealing cap structure of the present invention.

[0016] In the figure: 1, venous tube body; 2, combination chamber 1; 3, combination chamber 2; 4, isolation plate; 5, temporary storage chamber; 6, docking drive unit; 7, closing member; 71, docking chamber; 72, fixing plate; 73, sealing gasket; 74, sealing ring; 8, rotating member; 81, through groove; 82, driving shaft; 83, spiral groove; 84, push rod; 9, reset member; 91, extension rod; 92, reset chamber; 93, docking plate; 94, reset spring; 10, pulse flushing unit; 11, liquid supply member; 111, separation plate; 112, mounting plate; 113, liquid supply pipe ; 12. Discharge part; 121. Multi-stage telescopic rod 1; 122. Piston plate; 123. Extrusion spring; 124. Connecting compartment; 125. Blocking block; 126. Rubber ring; 127. Multi-stage telescopic rod 2; 128. Guide groove; 129. Discharge groove; 1210. Vent hole; 13. Switching part; 131. Positioning plate; 132. Rotating shaft; 133. Winding wheel; 134. Towing rope; 135. Guide plate; 136. Fixed compartment; 137. Fixed groove; 138. Rotating block; 139. Positioning rod; 14. Sealing cap; 15. Disinfection sponge. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Example 1: Please refer to Figure 1-Figure 10 The present invention provides a technical solution: an assembled central venous catheter, comprising a venous tube body 1, a combination chamber 1 2 and a combination chamber 2 3, wherein the combination chamber 1 2 and the combination chamber 2 3 are interference fit, and the combination chamber 1 2 and the combination chamber 2 3 are provided with guide plates 135 and guide grooves that cooperate with each other, and further comprising an isolation plate 4, wherein two isolation plates 4 are provided, and the two isolation plates 4 are rotatably arranged in the combination chamber 1 2 and the combination chamber 2 3 respectively; a temporary storage chamber 5, wherein the temporary storage chamber 5 is installed in the combination chamber 2 3.

[0019] The docking drive unit 6 is provided in plurality, and the plurality of docking drive units 6 are respectively provided on the combination chamber 1 2 and the combination chamber 2 3. The docking drive unit 6 is utilized to drive the isolation plate 4 to rotate, so that the two intravenous catheters are connected during assembly and are sealed separately during disassembly.

[0020] The advantage of the docking drive unit 6 is that the docking drive unit 6 can be used to drive the isolation plate 4 to rotate, so that the two intravenous catheters are connected during assembly and are sealed separately during disassembly. Through the automatic control of the drive unit, the assembly and disassembly process of the intravenous catheter can be simplified, the manual operation of medical staff can be reduced, and work efficiency can be improved. The design of the rotating isolation plate 4 makes the connection and disconnection process more intuitive and easy to understand, reducing the difficulty of operation. Not only that, in the disassembled state, the isolation plate 4 rotates to the sealing position to ensure that the intravenous catheters are independent and well sealed, preventing liquid leakage or air entry, and ensuring the safety of patients. The improvement of sealing performance also helps to reduce the risk of infection caused by poor sealing.

[0021] The pulse-type flushing unit 10 is arranged on the combined bin 2 3, and the pulse-type flushing unit 10 is connected to the temporary storage bin 5. The pulse-type flushing unit 10 is used to drive the saline in the temporary storage bin 5 into the central venous catheter in a "push-stop-push" manner, thereby forming a small vortex in the catheter to clean the residual medicine and blood attachments attached to the catheter.

[0022] The advantage of the pulse drive unit setting is that the physiological saline in the temporary storage bin 5 is driven into the central venous catheter in a 'push-stop-push' manner, thereby forming a small vortex in the catheter to clean the residual medicine and blood attachments attached to the catheter. The pulse flushing can form a small vortex in the catheter through the "push-stop-push" method. This vortex effect helps to effectively flush out the residual medicine, blood attachments and other impurities attached to the inner wall of the catheter and the blood vessel wall. Compared with the traditional continuous push-in flushing, the pulse flushing can clean the inside of the catheter more deeply, reduce the accumulation of residues, and thus reduce the risk of catheter blockage. The residual medicine and blood attachments are a breeding ground for bacteria. Regular use of pulse flushing for cleaning can effectively reduce the accumulation of these pollutants, thereby reducing the risk of catheter-related infection. Pulse flushing can also help remove the microbial film in the catheter, which is one of the important measures to prevent catheter infection.

[0023] The docking drive unit 6 includes a closing member 7 arranged on the combined warehouse 1 2 and the combined warehouse 2 3, and the closing member 7 is used to seal the combined warehouse 1 2 and the combined warehouse 2 3. The combined warehouse 1 2 and the combined warehouse 2 3 are provided with a rotating member 8, and the rotating member 8 is used to drive the isolation plate 4 to rotate. The combined warehouse 1 2 and the combined warehouse 2 3 are provided with a reset member 9, and the reset member 9 is used to drive the isolation plate 4 to reset.

[0024] The closing member 7 includes a docking chamber 71 arranged on the isolation plate 4. The docking chamber 71 is connected to the interior of the combination chamber 1 2 and the combination chamber 2 3. Both the combination chamber 1 2 and the combination chamber 2 3 are provided with a fixing plate 72. The fixing plate 72 is a semicircular plate. A sealing gasket 73 is provided on the side of the fixing plate 72 that contacts the docking chamber 71. A sealing ring 74 is provided on the docking chamber 71.

[0025] The advantage of setting up the closure 7 is that it can automatically rotate the isolation plate 4 to a sealing position when disassembled, ensuring that the intravenous catheters are each independent and well sealed, preventing liquid leakage or air entry, and ensuring the safety of the patient. The improvement in sealing performance also helps to reduce the risk of infection caused by poor sealing.

[0026] The rotating member 8 includes a through slot 81 formed on the isolation plate 4 , a driving shaft 82 is slidably disposed in the through slot 81 , a spiral slot 83 is formed on the driving shaft 82 , and a push rod 84 slidably connected to the spiral slot 83 is disposed in the through slot 81 .

[0027] The reset member 9 includes an extension rod 91 arranged in the combination bin 1 2 and the combination bin 2 3, and a reset bin 92 is arranged on the extension rod 91. The reset bin 92 is rotatably connected to the isolation plate 4, and a docking plate 93 is slidably arranged in the reset bin 92. The docking plate 93 is connected to the driving shaft 82, and a reset spring 94 is arranged on the docking plate 93, and one end of the reset spring 94 is connected to the reset bin 92.

[0028] The advantage of setting the reset member 9 is that there is no need for manual operation by the staff. The automatic reset function reduces the steps of manual operation by the staff, thereby saving time, improving overall operating efficiency, avoiding reset errors caused by improper operation or negligence of the staff, and improving the reliability and stability of the equipment.

[0029] When docking, the guide plates 135 on the combination warehouse 1 2 and the combination warehouse 2 3 are engaged with the guide grooves, and then the combination warehouse 1 2 and the combination warehouse 2 3 are pushed to dock, and the connection and fixation of the two are completed by interference fit. During the docking process of the combination warehouse 1 2 and the combination warehouse 2 3, the pushing shafts 82 respectively arranged on the combination warehouse 1 2 and the combination warehouse 2 3 are squeezed against each other. Under the action of pressure, the pushing shaft 82 overcomes the elastic force of the reset spring 94 and enters the reset warehouse 92. During the movement of the pushing shaft 82, the spiral groove 83 provided thereon moves synchronously. The movement of the spiral groove 83 drives the pushing rod and the isolation plate 4 connected to the pushing rod to rotate, thereby driving the docking warehouses 71 on the multiple isolation plates 4 to dock with each other. The setting of the sealing ring 74 can ensure the sealing of the two docking warehouses 71 during docking. At this time, the combination warehouse 1 2 and the combination warehouse 2 3 are connected to each other. When the combination warehouse 1 2 and the combination warehouse 2 3 need to be disassembled, the reset spring 94 is released again, driving the pushing shaft 82 to reset, so that the docking warehouse 71 is reset, and the setting of the fixing plate 72 and the sealing gasket 73 can ensure the sealing of the docking warehouse 71 after separation.

[0030] The pulse flushing unit 10 includes a liquid supply component 11 arranged in the combined chamber 2 3, and the liquid supply component 11 is used to provide physiological saline to the temporary storage chamber 5. The temporary storage chamber 5 is provided with a discharge component 12, and the discharge component 12 is used to deliver the physiological saline in the temporary storage chamber 5 into the central venous catheter in a "push-stop-push" manner. The combined chamber 2 3 is provided with a switching component 13, and the switching component 13 is used to drive the central venous tube to switch between drug delivery and flushing.

[0031] The liquid supply component 11 includes a separation plate 111 arranged in the combined bin 2 3 , a mounting plate 112 is arranged in the combined bin 2 3 , the mounting plate 112 is connected to the temporary storage bin 5 , a liquid supply pipe 113 is arranged on the separation plate 111 , and the liquid supply pipe 113 passes through the mounting plate 112 and is connected to the temporary storage bin 5 .

[0032] The discharge member 12 includes a multi-stage telescopic rod 121 disposed in the temporary storage bin 5, the multi-stage telescopic rod 121 is provided with a piston plate 122 slidably connected to the temporary storage bin 5, the piston plate 122 and the multi-stage telescopic rod are sleeved with an extrusion spring 123, the temporary storage bin 5 is provided with a connecting bin 124, a blocking block 125 is slidably disposed in the connecting bin 124, a rubber ring 126 is provided on the blocking block 125, and the blocking block 125 and the rubber ring 126 are provided. The rubber ring 126 is slidably connected to the connecting warehouse 124, and a multi-stage telescopic rod 127 is provided on the piston plate 122. One end of the multi-stage telescopic rod 127 is connected to the blocking block 125. A guide groove 128 is provided on the blocking block 125, and the guide groove 128 is connected to the temporary storage warehouse 5. A discharge groove 129 used in conjunction with the guide groove 128 is provided on the connecting warehouse 124, and a venting hole 1210 is provided on the temporary storage warehouse 5 away from the end of the combined warehouse 12.

[0033] The advantage of the discharge member 12 is that it can drive the saline solution in the temporary storage bin 5 into the central venous catheter in a 'push-stop-push' manner, thereby forming a small vortex in the catheter to clean the residual medicine and blood attachments attached to the catheter. The pulse flushing can form a small vortex in the catheter through the "push-stop-push" method. This vortex effect helps to effectively flush out the residual medicine, blood attachments and other impurities attached to the inner wall of the catheter and the blood vessel wall.

[0034] The switching member 13 includes a positioning plate 131 arranged on the combined warehouse 2 3, a rotating shaft 132 is arranged on the positioning plate 131, a winding wheel 133 is arranged on the rotating shaft 132, a traction rope 134 is arranged on the winding wheel 133, the traction rope 134 passes through the combined warehouse 2 3 and the temporary storage warehouse 5 and is connected with the piston plate 122, and the traction rope 134 is movably connected with the combined warehouse 2 3 and the temporary storage warehouse 5, a guide plate 135 is arranged on the separation plate 111, the traction rope 134 passes through the guide plate 135, a fixed warehouse 136 is arranged on the combined warehouse 2 3, the fixed warehouse 136 is rotatably connected with the rotating shaft 132, a fixed groove 137 is opened on the fixed warehouse 136, a rotating block 138 is arranged on the rotating shaft 132, and a positioning rod 139 used in conjunction with the fixed groove 137 is arranged on the rotating block 138.

[0035] The advantage of setting up the switching member 13 is that it allows medical staff to quickly switch between drug administration and flushing without complicated operations or additional equipment, thereby shortening the treatment time. Rapid switching helps to ensure that the drug is delivered to the patient in a timely and accurate manner, improving the treatment effect, while simplifying the operating process and reducing the risk of errors caused by improper operation or confusion.

[0036] When flushing and cleaning is required, the staff first introduces saline into the intravenous catheter, and the saline flows into the liquid supply pipe 113 through the combination chamber 1 2 and the combination chamber 2 3, and then flows into the temporary storage chamber 5 through the liquid supply pipe 113. When the saline continues to flow into the temporary storage chamber 5, the piston plate 122 is first squeezed, and the piston plate 122 is compressed and recovered, thereby driving the multi-stage telescopic rod 2 127 to expand. When the piston plate 122 moves to the set position, the multi-stage telescopic rod 2 127 is expanded to the limit, thereby driving the blocking block 125 connected to the multi-stage telescopic rod 2 127 to move, and the blocking block 125 moves. When the piston plate 122 is fully reset, the multi-stage telescopic rod 127 pushes the blocking block 125 to reset, so that the drainage groove and the discharge groove 129 are aligned again, so that the physiological saline no longer flows into the next section of the catheter, thereby forming a brief pause. At the same time, the provision of the rubber ring 126 can also improve the sealing performance of the connecting chamber 124.

[0037] When it is necessary to switch to the medicine delivery mode, the staff rotates the rotating shaft 132 to rotate the winding wheel 133 and reel in the traction rope 134. The traction rope 134 is connected to the piston plate 122, so that the piston plate 122 can be pulled to move, and then the blocking block 125 is driven to move through the multi-stage telescopic rod 127, so that the drainage groove is docked with the discharge groove 129 opened on the connecting bin 124, and at the same time, the locking rod 139 on the rotating block 138 is used in conjunction with the fixed groove 137 on the fixed bin 136 to fix the position of the rotating shaft 132, thereby locking the current working mode.

[0038] When in use, the guide plates 135 on the combined chamber 1 2 and the combined chamber 2 3 are engaged with the guide grooves during docking, and then the combined chamber 1 2 and the combined chamber 2 3 are pushed to dock, and the connection and fixation of the two are completed by interference fit. During the docking process of the combined chamber 1 2 and the combined chamber 2 3, the pushing shafts 82 respectively arranged on the combined chamber 1 2 and the combined chamber 2 3 are squeezed against each other. Under the action of pressure, the pushing shaft 82 overcomes the elastic force of the reset spring 94 and enters the reset chamber 92. During the movement of the pushing shaft 82, the spiral groove 83 provided on it moves synchronously. The spiral groove 83 moves and drives the push rod and the isolation plate 4 connected to the push rod to rotate, thereby driving the docking chambers 71 on the multiple isolation plates 4 to dock with each other. The setting of the sealing ring 74 can ensure the sealing of the two docking chambers 71 when docking. At this time, the combination chamber 1 2 and the combination chamber 2 3 are connected to each other. When the combination chamber 1 2 and the combination chamber 2 3 need to be disassembled, the reset spring 94 is released again, driving the push shaft 82 to reset, so that the docking chamber 71 is reset, and the setting of the fixed plate 72 and the sealing gasket 73 can ensure the sealing of the docking chamber 71 after separation.

[0039] When flushing and cleaning is required, the staff first introduces saline into the intravenous catheter, and the saline flows into the liquid supply pipe 113 through the combination chamber 1 2 and the combination chamber 2 3, and then flows into the temporary storage chamber 5 through the liquid supply pipe 113. When the saline continues to flow into the temporary storage chamber 5, the piston plate 122 is first squeezed, and the piston plate 122 is compressed and recovered, thereby driving the multi-stage telescopic rod 2 127 to expand. When the piston plate 122 moves to the set position, the multi-stage telescopic rod 2 127 is expanded to the limit, thereby driving the blocking block 125 connected to the multi-stage telescopic rod 2 127 to move, and the blocking block 125 moves. When the piston plate 122 is fully reset, the multi-stage telescopic rod 127 pushes the blocking block 125 to reset, so that the drainage groove and the discharge groove 129 are aligned again, so that the physiological saline no longer flows into the next section of the catheter, thereby forming a brief pause. At the same time, the provision of the rubber ring 126 can also improve the sealing performance of the connecting chamber 124.

[0040] When switching to the medicine delivery mode, the staff rotates the rotating shaft 132 to rotate the winding wheel 133 and reel in the traction rope 134. The traction rope 134 is connected to the piston plate 122, so that the piston plate 122 can be pulled to move, and then the blocking block 125 is driven to move through the multi-stage telescopic rod 127, so that the drainage groove is docked with the discharge groove 129 opened on the connecting bin 124, and at the same time, the locking rod 139 on the rotating block 138 is used in conjunction with the fixed groove 137 on the fixed bin 136 to fix the position of the rotating shaft 132, thereby locking the current working mode.

[0041] Example 2: Please refer to Figure 11-Figure 12 The present invention provides a technical solution: a sealing cap 14 is provided on the combination chamber 1 2 and the combination chamber 2 3, and a disinfection sponge 15 is provided inside the sealing cap 14. The setting of the sealing cap 14 can further improve the sealing performance of the combination chamber 1 2 and the combination chamber 2 3. At the same time, the setting of the disinfection sponge 15 can disinfect the connection between the combination chamber 1 2 and the combination chamber 2 3, thereby reducing the probability of infection of the patient.

[0042] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0043] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. An assembled central venous catheter, comprising a venous tube body (1), a first assembly chamber (2) and a second assembly chamber (3), wherein the first assembly chamber (2) and the second assembly chamber (3) are interference fit, characterized in that: Also includes; An isolation plate (4), wherein two isolation plates (4) are provided, and the two isolation plates (4) are rotatably arranged in the first combined chamber (2) and the second combined chamber (3), respectively; A temporary storage bin (5), the temporary storage bin (5) being installed in the second combined bin (3); A docking drive unit (6), wherein a plurality of the docking drive units (6) are provided, and the plurality of the docking drive units (6) are respectively provided on the first combination chamber (2) and the second combination chamber (3), and the docking drive unit (6) is used to drive the isolation plate (4) to rotate, so that the two venous catheters are connected during assembly and are sealed separately during disassembly; A pulse-type catheter flushing unit (10) is provided on the second combined chamber (3), and the pulse-type catheter flushing unit (10) is connected to the temporary storage chamber (5). The pulse-type catheter flushing unit (10) is used to drive the physiological saline in the temporary storage chamber (5) into the central venous catheter in a 'push-stop-push' manner, thereby forming a small vortex in the catheter to clean the residual liquid medicine and blood attachments attached to the catheter.

2. The assembled central venous catheter according to claim 1, characterized in that: The docking drive unit (6) comprises a closing member (7) provided on the combined bin one (2) and the combined bin two (3), the closing member (7) being used to seal the combined bin one (2) and the combined bin two (3), a rotating member (8) being provided on the combined bin one (2) and the combined bin two (3), the isolation plate (4) being driven to rotate by the rotating member (8), and a resetting member (9) being provided on the combined bin one (2) and the combined bin two (3), the isolation plate (4) being driven to reset by the resetting member (9).

3. The assembled central venous catheter according to claim 2, characterized in that: The closing member (7) comprises a docking chamber (71) arranged on the isolation plate (4); the docking chamber (71) is in communication with the interior of the first combined chamber (2) and the second combined chamber (3); a fixing plate (72) is arranged on each of the first combined chamber (2) and the second combined chamber (3); the fixing plate (72) is a semicircular plate; a sealing gasket (73) is arranged on the side of the fixing plate (72) in contact with the docking chamber (71); and a sealing ring (74) is arranged on the docking chamber (71).

4. The assembled central venous catheter according to claim 3, characterized in that: The rotating member (8) comprises a through slot (81) formed on the isolation plate (4), a driving shaft (82) being slidably disposed in the through slot (81), a spiral slot (83) being formed on the driving shaft (82), and a push rod (84) being slidably connected to the spiral slot (83) being disposed in the through slot (81).

5. The assembled central venous catheter according to claim 4, characterized in that: The reset member (9) comprises an extension rod (91) arranged in the combination chamber 1 (2) and the combination chamber 2 (3); a reset chamber (92) is arranged on the extension rod (91); the reset chamber (92) is rotatably connected to the isolation plate (4); a docking plate (93) is slidably arranged in the reset chamber (92); the docking plate (93) is connected to the driving shaft (82); a reset spring (94) is arranged on the docking plate (93); one end of the reset spring (94) is connected to the reset chamber (92).

6. The assembled central venous catheter according to claim 5, characterized in that: The pulse-type catheter flushing unit (10) comprises a liquid supply component (11) arranged in the second combined chamber (3), and the liquid supply component (11) is used to supply physiological saline to the temporary storage chamber (5). The temporary storage chamber (5) is provided with a discharge component (12), and the discharge component (12) is used to deliver the physiological saline in the temporary storage chamber (5) into the central venous catheter in a 'push-stop-push' manner. The second combined chamber (3) is provided with a switching component (13), and the switching component (13) is used to drive the central venous catheter to switch between drug delivery and catheter flushing.

7. The assembled central venous catheter according to claim 6, characterized in that: The liquid supply component (11) comprises a separation plate (111) arranged in the second combined bin (3); a mounting plate (112) is arranged in the second combined bin (3); the mounting plate (112) is connected to the temporary storage bin (5); a liquid supply pipe (113) is arranged on the separation plate (111); the liquid supply pipe (113) passes through the mounting plate (112) and is connected to the temporary storage bin (5).

8. The assembled central venous catheter according to claim 7, characterized in that: The discharge member (12) comprises a multi-stage telescopic rod (121) disposed in the temporary storage bin (5); the multi-stage telescopic rod (121) is provided with a piston plate (122) slidably connected to the temporary storage bin (5); the piston plate (122) and the multi-stage telescopic rod are sleeved with a compression spring (123); the temporary storage bin (5) is provided with a connecting bin (124); a blocking block (125) is slidably disposed in the connecting bin (124); a rubber ring (126) is provided on the blocking block (125); the blocking block (125) and the rubber ring (126) are provided on the blocking block (125); The rubber ring (126) is slidably connected to the connecting bin (124); a second multi-stage telescopic rod (127) is provided on the piston plate (122); one end of the second multi-stage telescopic rod (127) is connected to the blocking block (125); a guide groove (128) is provided on the blocking block (125); the guide groove (128) is communicated with the temporary storage bin (5); a discharge groove (129) used in conjunction with the guide groove (128) is provided on the connecting bin (124); and a venting hole (1210) is provided on the end of the temporary storage bin (5) away from the combined bin (2).

9. The assembled central venous catheter according to claim 8, characterized in that: The switching member (13) comprises a positioning plate (131) arranged on the second combined warehouse (3), the positioning plate (131) being provided with a rotating shaft (132), the rotating shaft (132) being provided with a winding wheel (133), the winding wheel (133) being provided with a traction rope (134), the traction rope (134) passing through the second combined warehouse (3) and the temporary storage warehouse (5) and being connected to the piston plate (122), and the traction rope (134) being movably connected to the second combined warehouse (3) and the temporary storage warehouse (5), The separation plate (111) is provided with a guide plate (135), the traction rope (134) passes through the guide plate (135), the second combined bin (3) is provided with a fixed bin (136), the fixed bin (136) is rotatably connected to the rotating shaft (132), a fixed groove (137) is provided on the fixed bin (136), a rotating block (138) is provided on the rotating shaft (132), and a locking rod (139) used in conjunction with the fixed groove (137) is provided on the rotating block (138).

10. The assembled central venous catheter according to claim 9, characterized in that: The combination chamber 1 (2) and the combination chamber 2 (3) are provided with sealing caps (14), and a disinfecting sponge (15) is provided inside the sealing caps (14).

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