Floating conduit and conduit assembly

Abstract

The floating catheter comprises a catheter body, a balloon and an inflation branch pipe, and a first cavity extending in the axis direction of the catheter body is formed in the catheter body; the balloon is connected with the catheter main body and is communicated with the first cavity; the inflation branch pipe and the balloon are located at the two ends, on the axis of the first cavity, of the first cavity, a second cavity extending in the axis direction of the inflation branch pipe is formed in the inflation branch pipe, the inflation branch pipe is connected with the catheter body, the second cavity is communicated with the first cavity, and a filter material used for filtering gas is arranged in the first cavity and / or the second cavity. According to the floating catheter, the filter material is arranged on the first cavity and / or the second cavity for inflating the balloon, so that gas inflated into the balloon is effectively purified, the infection risk of a patient is reduced, and then the safety of the floating catheter is improved.

Description

Technical Field

[0001] This application belongs to the technical field of medical devices, and particularly relates to a floating catheter and a catheter assembly. Background Art

[0002] The floating catheter is a very useful tool for clinicians to evaluate and manage critically ill patients. As an auxiliary diagnostic tool, the floating catheter is used to measure hemodynamic parameters such as cardiac output, central venous pressure, right atrial pressure, pulmonary artery pressure, pulmonary artery wedge pressure, etc., providing data for the correct treatment of patients.

[0003] When using the floating catheter, it is necessary to inflate the balloon at its distal end to make it expand, and rely on the inflated balloon to float to the target position along the blood flow thrust. When the balloon is inflated, there is a phenomenon of slow gas leakage, and there is also a risk of rupture when the balloon is inflated, resulting in gas entering the blood vessel during product use. The impurities present in the gas have a probability of causing blood infection or forming thrombus. Utility Model Content

[0004] The embodiments of this application provide a floating catheter and a catheter assembly, which can filter impurities in the inflated gas.

[0005] The embodiments of this application provide a floating catheter, which includes a catheter body, a balloon and an inflation branch pipe. A first cavity extending along the axial direction of the catheter body is provided inside the catheter body; the balloon is connected to the catheter body and communicated with the first cavity; the inflation branch pipe and the balloon are located at both ends of the first cavity on its axis. A second cavity extending along the axial direction of the inflation branch pipe is provided inside the inflation branch pipe. The inflation branch pipe is connected to the catheter body and the second cavity is communicated with the first cavity. A filter material for filtering gas is provided in the first cavity and / or the second cavity.

[0006] According to the implementation manner of the first aspect of this application, the filter material includes at least one of a filter membrane, filter paper, activated carbon, asbestos, and diatomaceous earth.

[0007] According to the implementation manner of the first aspect of this application, a plurality of through holes are provided on the filter material, and the aperture of the through holes is less than or equal to 0.45 μm.

[0008] According to the implementation manner of the first aspect of this application, the aperture of the through holes is 0.1 μm.

[0009] According to the implementation manner of the first aspect of this application, a filtering mechanism is provided on the inflation branch pipe. The filtering mechanism includes a housing and a receiving cavity located inside the housing. The filter material is located in the receiving cavity. The filtering mechanism is located at one end of the second cavity in its axial direction. The filtering mechanism divides the second cavity into two sub-cavities arranged at intervals along the axial direction of the inflation branch pipe, and the receiving cavity communicates with the two sub-cavities.

[0010] According to an embodiment of the first aspect of the present application, an inflation valve is further provided on the inflation branch pipe, and the filtering mechanism is located on one side of the inflation valve facing the catheter body and / or on one side of the inflation valve facing away from the catheter body.

[0011] According to an embodiment of the first aspect of the present application, two connectors for communicating inside and outside the accommodation cavity are provided on the housing. When the filtering mechanism is located on the side of the inflation valve facing away from the catheter body, one of the connectors is directly or indirectly communicated with the inflation valve, and the other connector is detachably communicated with the inflation mechanism. The inflation mechanism is used to inflate the balloon through the inflation branch pipe and the catheter body; when the filtering mechanism is located on the side of the inflation valve facing the catheter body, one of the connectors is directly or indirectly communicated with the inflation valve, and the other connector is directly or indirectly communicated with the catheter body.

[0012] According to an embodiment of the first aspect of the present application, the connector is a Luer connector.

[0013] According to an embodiment of the first aspect of the present application, a main body connector is further included. The catheter body and the inflation branch pipe are connected through the main body connector, and the first cavity and the second cavity are communicated through the main body connector.

[0014] An embodiment of the second aspect of the present application provides a catheter assembly, including the above-mentioned floating catheter and an inflation mechanism. The inflation mechanism is detachably communicated with one end of the inflation branch pipe facing away from the catheter body.

[0015] The floating catheter of the embodiment of the present application includes a catheter body, a balloon, and an inflation branch pipe. A first cavity extending along its axial direction is provided inside the catheter body; the balloon is connected to the catheter body and communicated with the first cavity; the inflation branch pipe and the balloon are located at both ends of the first cavity on its axis. A second cavity extending along its axial direction is provided inside the inflation branch pipe. The inflation branch pipe is connected to the catheter body, and the second cavity is communicated with the first cavity. A filter material for filtering gas is provided in the first cavity and / or the second cavity. By providing a filter material on the first cavity and / or the second cavity for inflating the balloon, the gas filled into the balloon is effectively purified, the risk of patient infection is reduced, and the safety of the floating catheter is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0017] Figure 1 is a schematic structural diagram of a floating catheter according to some embodiments of the present application;

[0018] Figure 2 shows an example Figure 1Schematic cross-sectional structure diagram of the floating catheter at the A-A position;

[0019] Figure 3 Shows a schematic structural diagram of an exemplary floating catheter and an inflation mechanism.

[0020] Reference numerals:

[0021] 10. Floating catheter; 20. Catheter assembly; 30. Inflation mechanism;

[0022] 100. Catheter body; 110. First cavity; 111. First opening; 120. Third cavity;

[0023] 200. Balloon;

[0024] 300. Inflation branch pipe; 310. Filter mechanism; 311. Housing; 312. Connector; 320. Inflation valve;

[0025] 400. Second branch pipe;

[0026] 500. Main body connector. Detailed implementation manners

[0027] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application.

[0028] It should be noted that in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, elements defined by the statement "including..." do not exclude the presence of additional identical elements in the process, method, article or device including the said elements.

[0029] To solve the technical problems presented in the background art, the applicant proposes a floating catheter. Inside the catheter body, there is a first cavity extending along its axial direction; the balloon is connected to the catheter body and communicates with the first cavity; the inflation branch pipe and the balloon are located at both ends of the first cavity on its axis. Inside the inflation branch pipe, there is a second cavity extending along its axial direction. The inflation branch pipe is connected to the catheter body and the second cavity communicates with the first cavity. A filter material for filtering gas is provided in the first cavity and / or the second cavity.

[0030] For the floating catheter provided in this application, by providing a filter material on the first cavity and / or the second cavity for inflating the balloon, the gas filled into the balloon is effectively purified, reducing the risk of patient infection, and thus improving the safety of the floating catheter.

[0031] The following introduces the floating catheter provided in the embodiments of this application with reference to the accompanying drawings. In the drawings, for the convenience of drawing, the dimensions in the figures are not necessarily in proportion to the actual dimensions.

[0032] Figure 1 It is a schematic structural diagram of the floating catheter for some embodiments of this application; Figure 2 Showing an example Figure 1 The cross-sectional structural diagram of the floating catheter in the A-A position in.

[0033] Combined with Figure 1 and Figure 2 It can be seen that this application provides a floating catheter 10, including a catheter body 100, a balloon 200, and an inflation branch pipe 300. Inside the catheter body 100, there is a first cavity 110 extending along its axial direction. The balloon 200 is connected to the catheter body 100 and communicates with the first cavity 110. The inflation branch pipe 300 and the balloon 200 are located at both ends of the first cavity 110 on its axis. Inside the inflation branch pipe 300, there is a second cavity (not shown) extending along its axial direction. The inflation branch pipe 300 is connected to the catheter body 100 and the second cavity communicates with the first cavity 110. A filter material (not shown) for filtering gas is provided in the first cavity 110 and / or the second cavity.

[0034] In some implementation manners, the filter material fills the cavity radially along the first cavity and / or the second cavity, and fills part of the cavity axially in the first cavity and / or the second cavity, so that the gas entering the balloon 200 is filtered by the filter material.

[0035] The balloon 200 is located at the distal end of the catheter body 100, and the inflation branch tube 300 is located at the proximal end of the catheter body 100. When the floating catheter 10 is in use, the balloon 200 at the distal end of the catheter body 100 is inserted into the blood vessel of the patient, and at least a part of the inflation branch tube 300 is located outside the patient. The user inflates the balloon 200 in the blood vessel through the second cavity in the inflation branch tube 300 and the first cavity 110 in the catheter body 100 to make it expand, so that the catheter body 100 floats to the target position along the blood flow thrust by means of the inflated balloon 200.

[0036] It can be understood that in this application, the proximal end refers to the end facing the operator or physician, and the distal end refers to the end away from the operator or physician.

[0037] In some of these embodiments, the filter medium can be provided in only one of the first cavity 110 and the second cavity, or the filter medium can be provided in both the first cavity 110 and the second cavity. For the floating catheter 10 provided in this embodiment, by providing the filter medium on the first cavity 110 and / or the second cavity for inflating the balloon 200, the gas filled into the balloon 200 is effectively purified, the infection risk of the patient is reduced, and thus the safety of the floating catheter is improved.

[0038] After describing the overall structure of the floating catheter 10, the specific structure of the filter medium will be described below. In some of these embodiments, the filter medium includes at least one of a filter membrane, filter paper, activated carbon, asbestos, and diatomaceous earth. The filter medium can be directly filled in the first cavity 110 and / or the second cavity.

[0039] In some of these embodiments, the filter medium is provided with a plurality of through holes, and the aperture of the through holes is less than or equal to 0.45 μm.

[0040] The selection of the aperture of the filter medium is crucial for filtering microorganisms such as bacteria. According to different application requirements and the characteristics of microorganisms, the selection of the aperture of the filter medium is different. The diameter of most solid particles is greater than 1 μm, and the diameter of most bacteria and fungi is greater than 0.5 μm. The filter medium with an aperture of 0.45 μm selected by the filtering mechanism 310 in the embodiments of this application can filter out most bacteria, fungi and solid particles in the gas, and at the same time maintain a good gas flow rate, ensuring the inflation efficiency of the balloon 200 while filtering the gas.

[0041] In some of these embodiments, the aperture of the filter medium is 0.1 μm.

[0042] The diameter of most viruses is greater than 0.1 μm. The filter medium with an aperture of 0.1 μm selected by the filtering mechanism 310 in the embodiments of this application can not only filter out most bacteria, fungi and solid particles in the gas, but also filter out most viruses in the gas, further improving the safety of the floating catheter 10.

[0043] Figure 3 A schematic structural diagram of an exemplary floating catheter and an inflation mechanism is shown.

[0044] Combination Figure 1 and Figure 3 It can be seen that in some embodiments, a filter mechanism 310 is provided on the gas branch pipe 300, and the filter mechanism includes a housing 311 and a receiving cavity (not shown) located in the housing 311, and the filter material is located in the receiving cavity. The filter mechanism 310 is located at one end of the second cavity in its axial direction, or the filter mechanism 310 divides the second cavity into two sub-cavities arranged at intervals along the axial direction of the gas branch pipe, and the receiving cavity connects the two sub-cavities.

[0045] The filtering mechanism 310 is located at one end of the second cavity in the axial direction, which means that the filtering mechanism can be located at the proximal end of the inflation branch 300 and is directly and detachably connected to the inflation mechanism 30. The inflation mechanism 30 is used to inflate the balloon 200 through the inflation branch 300 and the catheter body 100. The filtering mechanism 310 can also be located at the distal end of the inflation branch 300, and the accommodating cavity communicates with the second cavity and the first cavity 110.

[0046] The floating catheter 10 provided in this embodiment is convenient for improving the existing floating catheter and facilitating maintenance and replacement of the filter material by arranging the filter mechanism 310 on the inflation branch tube 300 and accommodating the filter material in the filter mechanism 310. By arranging the filter mechanism 310 on the inflation branch tube 300, the inflation branch tube 300 is located outside the body during the intervention of the floating catheter 10, and there is no need to consider the influence of the filter mechanism 310 on the intervention size of the floating catheter 10, thereby reducing the design cost.

[0047] In some embodiments, an inflation valve 320 is further provided on the inflation branch pipe 300 , and the filtering mechanism 310 is located on a side of the inflation valve 320 facing the catheter body 100 and / or a side of the inflation valve 320 facing away from the catheter body 100 .

[0048] In some embodiments, the filter mechanism 310 is disposed on only one side of the inflation valve 320. In this embodiment, the filter mechanism 310 is disposed on the side of the inflation valve 320 facing the catheter body 100.

[0049] In other embodiments, a filter mechanism 310 is provided on both sides of the inflation valve 320. The pore sizes of the filter materials in the two filter mechanisms 310 may be the same or different. By providing two filter mechanisms 310, the probability of filtration failure caused by damage to the filter material is reduced, and the safety of the floating catheter 10 is further improved.

[0050] In some of the embodiments, when the floating catheter 10 is in use, the inflation valve 320 is always located outside the patient's body, which is convenient for medical staff to operate and reduces the difficulty of intervention of the floating catheter 10 .

[0051] In the filtering mechanism 310 in the embodiments of the present application, by providing an inflation valve 320 on the inflation branch pipe 300, the inflation valve 320 is used to control the connection and closure of the cavities on both sides thereof. By providing the inflation valve 320 on the inflation branch pipe 300, the user can control the inflation of the balloon 200 by sealing it through the inflation valve 320 when the balloon 200 is inflated, or open the inflation valve 320 to deflate the balloon 200.

[0052] In some embodiments, two connectors 312 for connecting the inside and outside of the accommodation cavity are provided on the housing 311. When the filtering mechanism 310 is located on the side of the inflation valve 320 away from the catheter body 100, one of the connectors 312 is directly or indirectly connected to the inflation valve 320, and the other connector 312 is detachably connected to the inflation mechanism 30. When the filtering mechanism 310 is located on the side of the inflation valve 320 facing the catheter body 100, one of the connectors 312 is directly or indirectly connected to the inflation valve 320, and the other connector 312 is directly or indirectly connected to the catheter body 100.

[0053] In some embodiments, the connector 312 is a Luer connector, and the filtering mechanism 310 and the inflation branch pipe 300 are connected through the Luer connector. The Luer connector is a standardized micro-leak-free connector, which is widely used in medical and laboratory equipment, and its specific structure will not be described in detail here.

[0054] In other embodiments, the filtering mechanism 310 and the inflation branch pipe 300 are hermetically connected by glue.

[0055] In some embodiments, before the floating catheter 10 leaves the factory, the gases in the catheter body 100 and the inflation branch pipe 300 are evacuated first, and then the filtering mechanism 310 is connected to the inflation branch pipe 300, so as to avoid impurities in the residual air during the production process of the floating catheter 10 from entering the patient's body during subsequent use.

[0056] After describing the overall structure of the filtering mechanism 310, the specific structures of other components in the floating catheter will be described below with reference to the accompanying drawings. In some embodiments, the balloon 200 and the inflation branch pipe 300 are respectively located at both ends of the catheter body 100. A first cavity 110 extending along the axial direction of the catheter body 100 is provided in the catheter body 100, and the first cavity 110 communicates with the inflation branch pipe 300 and the balloon 200.

[0057] In some embodiments, a first opening 111 communicating the first cavity 110 and the balloon 200 is provided on the circumferential side of the distal end of the catheter body 100. Since the catheter body 100 is a tubular structure, the opening on its circumferential side refers to the opening on the tube wall.

[0058] In some of these embodiments, a third cavity 120 extending along the axial direction thereof is further provided in the catheter body 100. The third cavity 120 is independent of the first cavity 110. An opening (not shown) communicating with the third cavity 120 is provided at the end or the circumferential side of the catheter body 100. When the floating catheter 10 is in the target guiding position, the openings at different positions on the catheter body 100 communicate with blood vessels at different positions in the patient's body.

[0059] Combined Figure 1 with Figure 2 it can be seen that in some of these embodiments, the floating catheter 10 further includes a second branch tube 400. The second branch tube 400 is connected to the catheter body 100 and communicates with the third cavity 120. A Luer connector is provided at one end of the second branch tube 400 facing away from the catheter body 100. The Luer connector is used for detachably connecting with a detection mechanism (not shown) outside the body. The detection mechanism can measure various hemodynamic parameters of the patient through the second branch tube 400, the third cavity 120 and the opening on the catheter body 100. One end of the second branch tube 400 facing away from the catheter body 100 can also be fixedly connected to the detection mechanism through an injection molding process.

[0060] In some of these embodiments, a plurality of third cavities 120 are provided in the catheter body 100. The floating catheter 10 includes a plurality of second branch tubes 400. The second branch tubes 400 are in one-to-one correspondence and communicate with the same number of third cavities 120. Among them, the inflation branch tube 300 and the second branch tubes 400 are connected to the catheter body 100 through the same main body joint 500.

[0061] In this embodiment, it is exemplified that the number of the third cavities 120 is 3. One of the third cavities 120 is a distal cavity, and its opening is located on the end face at the distal end of the catheter body 100. This third cavity 120 is used for accommodating a guide wire (not shown), aspirating blood, infusing fluid and measuring the distal blood pressure. The second third cavity 120 is a proximal cavity, and its opening is located on the circumferential side of the catheter body 100 and proximal to the first opening 111. This third cavity 120 is used for aspirating blood, infusing fluid and measuring the proximal blood pressure. The third third cavity 120 is a thermistor cavity, which is used for measuring the blood temperature. The opening of the thermistor cavity is located on the circumferential side 4 cm away from the distal end of the catheter body 100. The thermistor is in direct contact with the blood in the blood vessel through this opening. The connecting wire of the thermistor extends out of the body through the thermistor cavity and the second branch tube 400 communicating therewith and is connected to an external device.

[0062] In some of these embodiments, the floating catheter 10 further includes a main body joint 500. The catheter body 100 and the inflation branch tube 300 are connected through the main body joint 500, and the first cavity 110 and the second cavity communicate through the main body joint 500.

[0063] In some of these embodiments, the inflatable branch pipe 300 and the second branch pipe 400 are connected to the catheter body 100 through the same main body joint 500, and multiple independent pipelines are provided in the catheter body 100 to communicate the first cavity 110 with the second cavity and the third cavity 120 with the cavity in the second branch pipe 400. In other embodiments, the number of the third cavity 120 and the second branch pipe 400 can be increased or decreased according to actual needs.

[0064] In some of these embodiments, the materials of the catheter body 100, the inflatable branch pipe 300, and the second branch pipe 400 include high molecular materials such as PEBAX (polyether block polyamide), PVC (polyvinyl chloride), PU (polyurethane), PE (polyethylene), and PP (polypropylene). The catheter body 100, the inflatable branch pipe 300, and the second branch pipe 400 can be prepared by an extrusion process.

[0065] In addition, in combination with Figure 3 it can be seen that the present application also provides a catheter assembly 20, including the floating catheter 10 provided in any of the above embodiments and an inflation mechanism 30. The inflation mechanism 30 is detachably communicated with the end of the inflatable branch pipe 300 away from the catheter body 100.

[0066] In some of these embodiments, the inflation mechanism 30 is a syringe.

[0067] In other embodiments, the inflation mechanism 30 is an air pump.

[0068] Since the catheter assembly 20 provided in the second aspect embodiment of the present application includes the floating catheter 10 of any of the above embodiments, the catheter assembly 20 provided in the second aspect embodiment of the present application has the beneficial effects of the floating catheter 10 of any of the above embodiments, which will not be elaborated herein.

[0069] As described above, only the specific embodiments of the present application are provided. Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described systems, modules, and units can refer to the corresponding processes in the foregoing method embodiments, which will not be elaborated herein. It should be understood that the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope disclosed in the present application, and these modifications or substitutions should all be covered within the protection scope of the present application.

Claims

1. A floating catheter, characterized in that: include: The catheter body has a first cavity extending along its axial direction; a balloon connected to the catheter body and in communication with the first cavity; The inflation branch tube and the balloon are located at both ends of the first cavity on its axis. A second cavity extending along its axis is provided inside the inflation branch tube. The inflation branch tube is connected to the catheter body and the second cavity is connected to the first cavity. A filter material for filtering gas is provided in the first cavity and / or the second cavity.

2. The floating catheter according to claim 1, characterized in that: The filter material includes at least one of a filter membrane, filter paper, activated carbon, asbestos, and diatomaceous earth.

3. The floating catheter according to claim 1, characterized in that: The filter material is provided with a plurality of through holes, and the pore diameter of the through holes is less than or equal to 0.45 μm.

4. The floating catheter according to claim 3, characterized in that: The through hole has a diameter of 0.1 μm.

5. The floating catheter according to claim 1, characterized in that: The inflation branch pipe is provided with a filtering mechanism, which includes a shell and a accommodating cavity located in the shell, the filter material is located in the accommodating cavity, the filtering mechanism is located at one end of the second cavity in its axial direction, the filtering mechanism divides the second cavity into two sub-cavities arranged at intervals along the axial direction of the inflation branch pipe, and the accommodating cavity connects the two sub-cavities.

6. The floating catheter according to claim 5, characterized in that: The inflation branch pipe is also provided with an inflation valve, and the filtering mechanism is located on a side of the inflation valve facing the catheter body and / or a side of the inflation valve facing away from the catheter body.

7. The floating catheter according to claim 6, characterized in that: The shell is provided with two connectors for connecting the inside and outside of the accommodating cavity. When the filtering mechanism is located on the side of the inflation valve away from the catheter body, one of the connectors is directly or indirectly connected to the inflation valve, and the other connector is used to be detachably connected to the inflation mechanism, and the inflation mechanism is used to inflate the balloon through the inflation branch and the catheter body; when the filtering mechanism is located on the side of the inflation valve facing the catheter body, one of the connectors is directly or indirectly connected to the inflation valve, and the other connector is directly or indirectly connected to the catheter body.

8. The floating catheter according to claim 7, characterized in that: The connector is a Luer connector.

9. The floating catheter according to claim 1, characterized in that: It also includes a main body joint, through which the catheter main body is connected to the inflation branch pipe, and the first cavity and the second cavity are communicated.

10. A catheter assembly, characterized in that: The floating catheter comprises the floating catheter as claimed in any one of claims 1 to 9 and an inflation mechanism, wherein the inflation mechanism is detachably connected to an end of the inflation branch tube away from the catheter body.

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