PICC (Peripherally Inserted Central Catheter) dissolving device

Abstract

The utility model relates to the technical field of medical instruments, in particular to a PICC (Peripherally Inserted Central Catheter) dissolving tube device which comprises a tee joint, a dosing device, a connecting assembly and a negative pressure assembly, the negative pressure assembly comprises an injector, a connecting pipe, a piston, a pull rod, a baffle and a first sealing cover, the connecting pipe is in threaded connection with the tee joint, the injector is fixedly connected with the connecting pipe, the piston is in sliding connection with the injector, the pull rod is fixedly connected with the piston, the baffle is fixedly connected with the injector, and the first sealing cover is detachably connected with the injector. An interlayer is formed between the baffle and the bottom wall of the injector, blood pumped back can flow into the interlayer and is prevented from making contact with the piston as much as possible, the sealing performance of the injector during pumping back is guaranteed through the first sealing cover, and pumping-back liquid in the interlayer can be discharged after the first sealing cover is detached. Therefore, the risk of pipeline infection during PICC dissolution is reduced, and the purpose of avoiding infection caused by repeated extraction of a conventionally used syringe is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a PICC tube dissolving device. Background Art

[0002] Peripherally inserted central catheters (PICCs) have the advantages of long retention time, reduced pain of repeated punctures, and reduced stimulation and damage to blood vessels by chemotherapy drugs or hypertonic fluids. Therefore, they are widely used in patients undergoing cancer chemotherapy.

[0003] However, PICC catheters are prone to blockage. To solve the problem of complete blockage of PICC, thrombolysis treatment is required clinically. Existing thrombolysis auxiliary equipment usually includes a three-way valve, a dosing syringe, and a suction syringe. One tube head of the three-way valve is connected to the PICC tube end, urokinase is extracted from the dosing syringe and connected to the three-way valve, and another empty suction syringe is connected to the three-way valve; when in use, the suction syringe and the PICC tube end are connected by the three-way valve, and the suction syringe is emptied to form a negative pressure in the PICC catheter. At this time, the handle of the suction syringe needs to be manually pulled to ensure negative pressure, and the three-way valve is switched to connect the dosing syringe and the PICC catheter. The urokinase in the dosing syringe is injected into the PICC catheter using the negative pressure.

[0004] When a traditional syringe draws out the air in the PICC tube, it will also draw out some blood. This can easily cause blood to flow back into the PICC tube during repeated extractions, causing infection. Utility Model Content

[0005] The utility model aims to provide a PICC tube dissolving device, which solves the problem that a traditional syringe will draw out part of the blood when drawing out the air in the PICC tube, which may easily cause blood to flow back into the PICC tube during repeated drawing and cause infection.

[0006] To achieve the above-mentioned purpose, the utility model provides a PICC tube dissolving device, including a tee, a drug dispensing device and a connecting assembly, wherein the connecting assembly is arranged on the tee, the drug dispensing device is connected to the tee through the connecting assembly, and also includes a negative pressure assembly; the negative pressure assembly includes a syringe, a connecting tube, a piston, a pull rod, a baffle and a first sealing cover, the connecting tube is threadedly connected to the tee, and is communicated with the tee, and is located on one side of the tee, the syringe is fixedly connected to the connecting tube, is communicated with the connecting tube, and is located on a side of the connecting tube away from the tee, the piston is slidably connected to the syringe, and is located inside the syringe, the pull rod is fixedly connected to the piston, and is located on one side of the piston, the baffle is fixedly connected to the syringe, and is located inside the syringe, and the first sealing cover is detachably connected to the syringe and is arranged on the syringe.

[0007] Wherein, the baffle has a vent hole, and the vent hole is arranged on the baffle and passes through the baffle.

[0008] Wherein, the connecting assembly includes a bent pipe, a threaded sleeve and a puncturing cone, the bent pipe is threadedly connected to the tee, communicated with the tee, and located on the side of the tee away from the connecting pipe; the threaded sleeve is fixedly connected to the bent pipe, communicated with the bent pipe, and located on the side of the bent pipe away from the tee; the puncturing cone is fixedly connected to the threaded sleeve and located inside the threaded sleeve.

[0009] The drug delivery device comprises a shell and a sealing membrane. The shell is threadedly connected to the threaded sleeve and is arranged on the threaded sleeve; the sealing membrane is connected to the shell and is located inside the shell.

[0010] Among them, the drug dispenser also includes a second sealing cover, an air inlet pipe and a third sealing cover, the second sealing cover is threadedly connected to the shell and is located on one side of the shell; the air inlet pipe is fixedly connected to the shell, communicated with the shell, and is located on one side of the shell; the third sealing cover is detachably connected to the air inlet pipe and is arranged on the air inlet pipe.

[0011] The utility model discloses a PICC tube dissolving device. When in use, the connecting tube, the PICC tube and the applicator are respectively connected to the three-way connection, and then the PICC tube and the syringe are connected through the three-way connection. The pull rod is pulled to drive the piston to move, thereby extracting the air in the PICC tube, so that a negative pressure is formed in the PICC tube. Then the three-way connection is switched to connect the PICC tube and the applicator. Since the PICC tube is under negative pressure, the urokinase in the applicator enters the PICC tube through the three-way connection to dissolve the tube. During the process of the syringe sucking in air, an interlayer is formed between the baffle and the bottom wall of the syringe, so that the blood drawn back will flow into the interlayer, and the contact between the blood and the piston is avoided as much as possible. The sealing of the syringe during the drawing back is ensured by the first sealing cover. When the first sealing cover is removed, the drawn back liquid in the interlayer can be discharged, thereby reducing the risk of pipeline infection during the PICC tube dissolving, that is, avoiding the purpose of infection caused by repeated drawing with the conventional syringe. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0013] Figure 1It is a schematic diagram of the overall structure of the PICC tube dissolving device of the first embodiment of the utility model.

[0014] Figure 2 It is a structural schematic diagram of the negative pressure assembly of the first embodiment of the utility model.

[0015] Figure 3 It is a schematic diagram of the installation structure of the second sealing cover of the second embodiment of the utility model.

[0016] In the figure: 101-tee, 102-dose dispenser, 103-connecting assembly, 104-syringe, 105-connecting tube, 106-piston, 107-pull rod, 108-baffle, 109-first sealing cover, 110-vent, 111-elbow, 112-threaded sleeve, 113-puncture cone, 114-housing, 115-sealing membrane, 116-negative pressure assembly, 117-PICC tube, 201-second sealing cover, 202-inlet pipe, 203-third sealing cover. DETAILED DESCRIPTION

[0017] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0018] First embodiment:

[0019] See also Figure 1 and Figure 2 ,in Figure 1 This is a schematic diagram of the overall structure of the PICC dissolving tube device. Figure 2 It is a structural schematic diagram of the negative pressure component.

[0020] The utility model provides a PICC dissolving tube device, comprising a three-way joint 101, a drug delivery device 102, a connecting component 103 and a negative pressure component 116, wherein the negative pressure component 116 comprises a syringe 104, a connecting tube 105, a piston 106, a pull rod 107, a baffle 108 and a first sealing cover 109, wherein the baffle 108 has a vent hole 110, the connecting component 103 comprises a bend 111, a threaded sleeve 112 and a puncturing cone 113, the drug delivery device 102 comprises a shell 114 and a sealing film 115, the baffle 108 blocks the blood drawn back from the syringe 104, so that the blood remains in the interlayer formed by the baffle 108 and the bottom wall of the syringe 104, and the drawn back liquid in the interlayer can be discharged by opening the first sealing cover 109, and it can be understood that the above scheme can be used to avoid infection caused by repeated aspiration of the syringe 104, and can also be used to solve the problem of convenient replacement of the drug delivery device 102.

[0021] According to this specific embodiment, the connection component 103 is disposed on the tee 101 , and the drug dispenser 102 is connected to the tee 101 via the connection component 103 .

[0022] The connecting tube 105 is threadedly connected to the tee 101, communicated with the tee 101, and is located on one side of the tee 101; the syringe 104 is fixedly connected to the connecting tube 105, communicated with the connecting tube 105, and is located on a side of the connecting tube 105 away from the tee 101; the piston 106 is slidably connected to the syringe 104 and is located inside the syringe 104; the pull rod 107 is fixedly connected to the piston 106 and is located on one side of the piston 106; the baffle 108 is fixedly connected to the syringe 104 and is located inside the syringe 104; the first sealing cap 109 is detachably connected to the syringe 104 and is arranged on the syringe 104; when in use, the connecting tube 105, the PICC tube 117, and the applicator 102 are respectively connected to the tee 101, and then the PICC tube 117 and the syringe 104 are communicated through the tee 101. Pulling the pull rod 107 drives the piston 106 to move, thereby extracting the air in the PICC tube 117, forming a negative pressure in the PICC tube 117, and then switching the tee 101 to connect the PICC tube 117 with the applicator 102. Since the PICC tube 117 is under negative pressure, the urokinase in the applicator 102 enters the PICC tube 117 through the tee 101 to dissolve the tube; during the process of the syringe 104 inhaling air, a sandwich is formed between the baffle 108 and the bottom wall of the syringe 104, so that the blood withdrawn will flow into the sandwich, and the contact between the blood and the piston 106 is avoided as much as possible. The sealing of the syringe 104 during withdrawal is ensured by the first sealing cover 109. When the first sealing cover 109 is removed, the withdrawn liquid in the sandwich can be discharged, thereby reducing the risk of pipeline infection during PICC dissolving the tube, that is, avoiding the purpose of infection caused by repeated withdrawal of the conventional syringe 104.

[0023] Secondly, the baffle 108 has a vent hole 110, which is arranged on the baffle 108 and penetrates the baffle 108; air can pass through the baffle 108 through the vent hole 110, and the vent hole 110 is located on the side of the baffle 108 away from the connecting tube 105, further preventing the backflow liquid from contacting the piston 106 through the vent hole 110, thereby ensuring that the backflow liquid remains in the interlayer between the baffle 108 and the bottom of the syringe 104.

[0024] At the same time, the elbow 111 is threadedly connected to the tee 101, communicated with the tee 101, and located on the side of the tee 101 away from the connecting pipe 105; the threaded sleeve 112 is fixedly connected to the elbow 111, communicated with the elbow 111, and located on the side of the elbow 111 away from the tee 101; the puncturing cone 113 is fixedly connected to the threaded sleeve 112, and located inside the threaded sleeve 112.

[0025] In addition, the housing 114 is threadedly connected to the threaded sleeve 112 and is disposed on the threaded sleeve 112 ; the sealing membrane 115 is connected to the housing 114 and is located inside the housing 114 .

[0026] The shell 114 is sealed by the sealing film 115 to prevent the urokinase inside the shell 114 from flowing out, and the puncturing cone 113 is provided with a through hole that passes through from top to bottom; when installing the shell 114, the thread of the port of the shell 114 is threadedly connected with the threaded sleeve 112, and the shell 114 moves during the threaded connection process, thereby driving the sealing film 115 to move, so that the puncturing cone 113 can puncture the sealing film 115 and extend into the shell 114. At this time, the urokinase in the shell 114 can flow into the curved pipe 111 through the through hole on the puncturing cone 113, and then be sucked into the negative pressure PICC tube 117; during the installation process, the shell 114 is sealed by the sealing film 115, and there is no need to worry about the outflow and leakage of urokinase in the shell 114, thereby facilitating the installation of the shell 114 on the threaded sleeve 112.

[0027] When using the PICC tube dissolving device of this embodiment, the piston 106 is driven to move by pulling the pull rod 107. The movement of the piston 106 draws out the air in the PICC tube 117, thereby forming a negative pressure in the PICC tube 117. During the withdrawal of the syringe 104, the blood is blocked by the baffle 108 to prevent the blood from contacting the piston 106, so that the drawn blood remains in the interlayer between the baffle 108 and the bottom wall of the syringe 104, while the air can flow freely through the vent 110 on the baffle 108. By opening the first sealing cover 109, the blood in the interlayer can be discharged from the syringe 104, thereby reducing the risk of pipeline infection during PICC tube dissolution, that is, avoiding infection caused by repeated withdrawal with the conventional syringe 104.

[0028] Second embodiment:

[0029] Based on the first embodiment, please refer to Figure 3 , Figure 32 is a schematic diagram of the installation structure of the second sealing cover of the second embodiment. The drug dispensing device 102 of this embodiment further includes a second sealing cover 201 , an air inlet pipe 202 and a third sealing cover 203 .

[0030] According to the present specific embodiment, the second sealing cover 201 is threadedly connected to the shell 114 and is located on one side of the shell 114; the air inlet pipe 202 is fixedly connected to the shell 114, communicated with the shell 114, and is located on one side of the shell 114; the third sealing cover 203 is detachably connected to the air inlet pipe 202 and is arranged on the air inlet pipe 202; when the shell 114 is stored and transported, the second sealing cover 201 is threadedly connected to the opening of the shell 114, so as to protect the sealing film 115 and prevent the sealing film 115 from being damaged and causing leakage of urokinase inside the shell 114; when installing the shell 114, the second sealing cover 201 is unscrewed to install the shell 114 on the threaded sleeve 112; during the drug administration process, the third sealing cover 203 is removed to allow outside air to enter the shell, so as to ensure that under the negative pressure of the PICC tube 117, the atmospheric pressure can press the urokinase dissolving fluid into the PICC tube 117 to achieve the effect of dissolving the tube.

[0031] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A PICC dissolving tube device, comprising a tee, a drug delivery device and a connecting assembly, wherein the connecting assembly is arranged on the tee, and the drug delivery device is connected to the tee through the connecting assembly, characterized in that: Also included is a negative pressure component; The negative pressure assembly includes a syringe, a connecting tube, a piston, a pull rod, a baffle and a first sealing cover. The connecting tube is threadably connected to the tee, communicated with the tee and is located on one side of the tee. The syringe is fixedly connected to the connecting tube, communicated with the connecting tube and is located on a side of the connecting tube away from the tee. The piston is slidably connected to the syringe and is located inside the syringe. The pull rod is fixedly connected to the piston and is located on one side of the piston. The baffle is fixedly connected to the syringe and is located inside the syringe. The first sealing cover is detachably connected to the syringe and is provided on the syringe.

2. The PICC dissolving tube device according to claim 1, characterized in that: The baffle plate has a vent hole, and the vent hole is arranged on the baffle plate and penetrates the baffle plate.

3. The PICC dissolving tube device according to claim 1, characterized in that: The connecting assembly includes a bent pipe, a threaded sleeve and a puncturing cone. The bent pipe is threadedly connected to the tee, communicated with the tee, and located on a side of the tee away from the connecting pipe; the threaded sleeve is fixedly connected to the bent pipe, communicated with the bent pipe, and located on a side of the bent pipe away from the tee; the puncturing cone is fixedly connected to the threaded sleeve and located inside the threaded sleeve.

4. The PICC dissolving tube device according to claim 3, characterized in that: The drug delivery device comprises a shell and a sealing film. The shell is threadedly connected to the threaded sleeve and is arranged on the threaded sleeve; the sealing film is connected to the shell and is located inside the shell.

5. The PICC dissolving tube device according to claim 4, characterized in that: The drug dispenser also includes a second sealing cover, an air inlet pipe and a third sealing cover. The second sealing cover is threadedly connected to the shell and is located on one side of the shell. The air inlet pipe is fixedly connected to the shell and communicated with the shell and is located on one side of the shell. The third sealing cover is detachably connected to the air inlet pipe and is arranged on the air inlet pipe.

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