Cable device of intrusive medical instrument

Abstract

The invention provides a cable device of an intrusive medical instrument. The cable device comprises a cable protection layer, an optical fiber unit, an infusion tube and a drainage tube, the cable protection layer comprises a first hollow part extending along the axis of the cable protection layer; the optical fiber unit is arranged in the first hollow part, and the axis passes through the optical fiber unit; the infusion tube and the liquid discharge tube are arranged around the optical fiber unit; and the optical fiber unit, the infusion tube and the liquid discharge tube respectively extend along the axis. The optical fiber unit is fully protected and is not easy to break; the infusion tube and the drainage tube are integrated in the cable device of the intrusive medical instrument, so that the infusion tube and the drainage tube are prevented from being subjected to twisting force and pulling force due to repeated bending or gravity action, finally, the problem of infusion liquid leakage occurs, and a plurality of problems such as invalidation of an infusion loop and a flushing loop are caused are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a cable device for an interventional medical device. Background Art

[0002] In the prior art, in addition to the sheath, two sets of pipelines are usually provided on the handle of the interventional blood pumping device. The first pipeline is used to connect the handle and the control device end to realize the transmission of electrical signals, and the second pipeline is used to connect the handle and the perfusion unit to realize the flow of perfusion fluid. The second pipeline is often provided with components such as a connecting tube, a liquid medicine filter and a pressure storage valve, and the connecting tube is protected by a branch silicone joint to prevent it from bending. This connection method often causes leakage of perfusion fluid due to debonding of the connecting tube. In addition, the above-mentioned interventional blood pumping device is used for several hours in a row. For example, the device stays in the patient for 72 hours. As the patient frequently gets up and lies down, the connecting tube also moves or undergoes some deformation, such as radial twisting and pulling, which eventually causes the connecting tube to tear or the connection to fail, causing the perfusion fluid to leak. The internal motor of the device located in the body cannot be cooled by the perfusion fluid and the temperature rises, affecting the patient's internal circulation. Furthermore, due to the lack of perfusion fluid to flush the particles inside the motor, or the inability to effectively treat the blood clots in the motor, the motor bearings are blocked, causing the motor to stop running, and the life of the pumping device is greatly reduced. In addition, the existing pipeline settings cause the perfusion pipeline inside the catheter to be too short, while the pipeline near the control device end is longer. The pipeline at the device end is easy to trip the user, which in turn causes damage to the connection, resulting in leakage of the perfusion fluid, bringing many risks. In addition, the internal pipeline layout of the cable is unreasonable, which makes some pipelines with weaker structural strength easy to damage. Summary of the invention

[0003] In order to overcome at least one of the problems in the related art, a first aspect of the present invention provides a cable device for an invasive medical device.

[0004] Wherein, the cable device of the invasive medical device comprises a cable protective layer, an optical fiber unit, an irrigation tube and a drainage tube;

[0005] The cable protective layer has a first hollow portion extending along its axial direction;

[0006] The optical fiber unit is arranged in the first hollow portion, and the axis passes through the optical fiber unit;

[0007] The irrigation tube and the drainage tube are arranged around the optical fiber unit;

[0008] The optical fiber unit, the perfusion tube and the drainage tube extend in the same direction.

[0009] In an optional embodiment, the cable device of the invasive medical device further includes a wire unit;

[0010] The wire unit is arranged in the first hollow portion and close to the optical fiber unit, and the wire unit extends along the axial direction.

[0011] In an optional embodiment, the irrigation tube and the drainage tube are arranged in the first hollow portion and are arranged close to the optical fiber unit.

[0012] In an optional embodiment, the electric wire unit includes at least two wires, and in the projection of the plane perpendicular to the axis, the electric wire units surround the optical fiber unit and are symmetrically distributed; and / or, in the projection of the plane perpendicular to the axis, the irrigation tube and the drainage tube are distributed at both ends of the optical fiber unit in the radial direction.

[0013] In an optional embodiment, the cable protective layer further comprises a second hollow portion extending along the axial direction of the cable protective layer;

[0014] The second hollow part serves as the perfusion tube or the drainage tube.

[0015] In an optional embodiment, the cable protective layer further includes a second hollow portion and a third hollow portion extending along the axial direction of the cable protective layer;

[0016] The second hollow part serves as the perfusion tube, and the third hollow part serves as the drainage tube.

[0017] In an optional embodiment, the cable protective layer includes a rubber coating layer, a shielding layer and a cable outer coat, wherein the rubber coating layer, the shielding layer and the cable outer coat are sequentially arranged from the inside to the outside.

[0018] In an optional embodiment, the second hollow portion and / or the third hollow portion is arranged in the cable outer coat.

[0019] In an optional embodiment, the cable device of the invasive medical device further comprises a retractable outer tube;

[0020] The irrigation pipe and the drainage pipe extend close to the outer surface of the cable protective layer;

[0021] The cable protective layer, the perfusion pipe and the drainage pipe are covered in the shrinkable outer tube.

[0022] In an optional embodiment, the cable device of the invasive medical device further includes a winding unit;

[0023] The irrigation pipe and the drainage pipe extend close to the outer surface of the cable protective layer;

[0024] The winding unit is wound around the outside of the cable protective layer, the perfusion pipe and the drainage pipe.

[0025] In an optional embodiment, a filling unit is provided in the first hollow portion.

[0026] A second aspect of the present invention provides a pumping system, the pumping system comprising a sheath tube, the sheath tube being connected to a cable device of any invasive medical device described in the first aspect.

[0027] The technical solution of the present invention has the following advantages or beneficial effects:

[0028] (1) The present invention rationally arranges the positional relationship between the perfusion tube and the drainage tube and the optical fiber unit, thereby utilizing the material properties of the perfusion tube and the drainage tube to provide support for the optical fiber unit, making the optical fiber unit less prone to bending and damage. In addition, the fluid flowing inside the perfusion tube and the drainage tube can also partially absorb the external pressure load, reducing the impact load on the optical fiber unit. The present invention integrates the perfusion tube and the drainage tube into the cable device of the interventional medical device, avoiding the problem that the perfusion tube and the drainage tube each constitute an independent line in the prior art, and the composite cable constitutes another line, reducing the number of pipelines on the handle, and effectively reducing the risk of two discrete lines increasing the risk of users tripping, and then causing the problem of perfusion fluid leakage. At the same time, the integrated pipeline also solves the problem that the perfusion tube and the drainage tube are subjected to repeated bending loads when the patient stands up and lies down in the prior art, avoiding the perfusion tube and the drainage tube being subjected to torsional force and pulling force due to repeated bending or gravity, and finally causing the problem of perfusion fluid leakage, and leading to many problems such as failure of the perfusion circuit and the flushing circuit.

[0029] (2) The present invention sets the wire unit close to the optical fiber unit, which not only fully utilizes the protective effect of the cable protective layer on the wire unit, but also fully utilizes the mechanical strength of the wire unit to protect the optical fiber unit, thereby preventing the optical fiber unit from being damaged under overload conditions and improving the overall structural strength of the cable device of the interventional medical device. The irrigation tube and the drainage tube are further set in the first hollow part, so that the cable protective layer can be used to protect the irrigation tube and the drainage tube, reducing the risk of leakage. At the same time, the irrigation tube and the drainage tube close to the surface of the optical fiber unit can enhance the protective effect of the optical fiber unit and further reduce the probability of damage to the optical fiber unit.

[0030] (3) The second hollow part can be used as an infusion pipe or a drainage pipe to effectively isolate the liquid delivery pipeline from the wire unit, avoiding the influence of liquid leakage on the operation of the wire unit. At the same time, it avoids the use of independent infusion pipes or drainage pipes, reducing the complexity of the structure and the production cost. Preferably, the second hollow part is used as an infusion pipe and the third hollow part is used as a drainage pipe, which can further reduce the complexity of the structure and the manufacturing cost.

[0031] (4) The use of a retractable outer tube to encapsulate the cable device of an interventional medical device can reduce the processing requirements of the cable device of an interventional medical device, with low cost investment, and is simpler and more practical. It does not need to design the size of the cable protective layer in advance, and only needs to select a suitable retractable outer tube. Users can flexibly adjust the number of irrigation tubes and drainage tubes as needed, which greatly enhances the flexibility and scope of application of the cable device assembly of the interventional medical device. For the solution using a winding unit, the user can directly wrap the winding unit on the outermost layer, thereby shortening the assembly time, improving the flexibility of installation, and allowing the operator to perform assembly operations without complex installation equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to better understand the present invention and do not constitute an improper limitation of the present invention.

[0033] Figure 1 is a cross-sectional schematic diagram of a cable device of an invasive medical device according to a first embodiment of the present invention;

[0034] Figure 2 is a schematic cross-sectional view of a cable device of an invasive medical device according to a second embodiment of the present invention;

[0035] Figure 3 is a schematic diagram of an assembled state of a cable device of an invasive medical device according to the first and second embodiments of the present invention;

[0036] Figure 4 is a cross-sectional schematic diagram of a cable device of an invasive medical device according to a third embodiment of the present invention;

[0037] Figure 5 is a schematic diagram of an assembled state of a cable device of an invasive medical device according to a third embodiment of the present invention;

[0038] Figure 6 is a schematic cross-sectional view of a cable device of an invasive medical device according to a fourth embodiment of the present invention;

[0039] Figure 7 is a schematic diagram of an assembled state of a cable device of an invasive medical device according to a fourth embodiment of the present invention;

[0040] Figure 8 It is a schematic diagram of the connection between the cable and the perfusion catheter in the prior art. DETAILED DESCRIPTION

[0041] The following is a description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, including various details of the embodiments of the present invention to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present invention. Similarly, for clarity and conciseness, the description of well-known functions and structures is omitted in the following description.

[0042] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0043] It should be understood that although the terms first, second, third, etc. may be used in the present application to describe various information, these information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0044] In the prior art, a blood pumping device works in a patient's body to assist blood flow in corresponding organs. For some blood pumping devices, when it pumps blood from the distal end to the proximal end, the blood will correspondingly enter the blood pumping device from the distal end to the proximal end. Therefore, the blood pumping device needs to be injected with perfusion fluid from the proximal and distal ends, and at least part of the perfusion fluid must be discharged into the blood. However, in some blood pumping devices, perfusion fluids such as glucose injected into the blood pumping device are all discharged into the human body after passing through the components in the blood pumping device, causing physical discomfort to the patient. In particular, perfusion waste fluid containing wear particles entering the human body will cause serious risks such as thrombosis. In addition, during the operation of the blood pumping device, the friction pairs of bearings and the like will generate a lot of heat, and local high temperature phenomena will occur. In practice, it is necessary to circulate the perfusion fluid to flush the blood pumping motor to take away the wear particles, heat and thrombus. However, the prior art often uses Figure 8The pipeline layout shown is that the handle 303 is the center, the distal end is connected to the sheath 301 through the sheath silicone joint 302, and the proximal end is connected to the composite cable 801 through the composite cable protection joint 304. The composite cable is only used to transmit electrical signals, such as delivering driving current to the blood pumping motor or transmitting measurement signals of various sensors. The handle also includes a side branch pipeline, such as a connecting tube 803 installed on one side of the handle through a branch silicone joint 802, and the connecting tube 803 is then connected to components such as a liquid filter 804 and a pressure storage valve 805 in turn. The handle 303 is usually placed on the patient's abdomen when in use. The patient's frequent standing and lying will cause the connecting tube to sag under the action of gravity, and be subjected to torsion and pulling forces, which will eventually cause the connecting tube 803 to tear or the connection to fail, causing the perfusion fluid to leak. As a result, the motor in the body cannot be cooled by the perfusion fluid, the motor temperature rises, and the patient's internal circulation is affected; at the same time, due to the lack of perfusion fluid for flushing the particles inside the motor in the body, or the inability to effectively treat the thrombus in the motor in the body, the motor bearing is blocked, causing the motor in the body to stop running, and the life of the blood pumping device is greatly reduced. In addition, the side branch pipeline will cause damage to structures such as the connecting pipe due to misoperation by medical staff and patients, causing the perfusion system to fail. In addition, the perfusion circuit and composite cable circuit of the side branch are both long, which increases the risk of patients or medical staff touching and tripping, and then leads to damage to the connection, causing leakage of the perfusion fluid. In other cases, due to the unreasonable layout of the pipeline inside the composite cable, when the composite cable is repeatedly bent under the action of external force or subjected to external impact loads, pipelines with weaker mechanical strength, such as optical fibers, are prone to irreversible damage such as breakage, thereby affecting the normal use of the blood pumping device.

[0045] In order to solve at least one of the above problems, the first aspect of the present invention provides a cable device for an interventional medical device, comprising a cable protective layer, an optical fiber unit, an irrigation tube and a drainage tube; a first hollow portion extending along its axial direction is provided in the cable protective layer; the optical fiber unit is arranged in the first hollow portion, and the axis passes through the optical fiber unit; the irrigation tube and the drainage tube are arranged around the optical fiber unit; the optical fiber unit, the irrigation tube and the drainage tube extend in the same direction.

[0046] An embodiment of the present disclosure provides a cable device of an interventional medical device, which is used in combination with a sheath device and a fluid pumping device to form a pumping system. The distal end of the sheath device is provided with a fluid pumping device, and the proximal end is connected to the cable device of the interventional medical device. The fluid pumping device works in a target environment and is used to transport the fluid in the target environment from the distal end to the proximal end. For example, taking the human body as the target environment, the fluid pumping device pumps blood from the distal end to the proximal end. Exemplarily, the fluid pumping device includes a transmission bearing and a transmission shaft, and an impeller unit is provided at the distal end of the transmission shaft. The transmission bearing is used to support the transmission shaft, and the impeller unit is driven by the driving load to rotate at high speed with the transmission shaft. The driving load is transmitted to the fluid pumping device through the cable device and the sheath device of the interventional medical device to drive the impeller unit to rotate. In practice, friction pairs such as transmission bearings will generate wear particles during high-speed rotation. If the particles are directly discharged into the human body, medical risks such as thrombosis will occur. Furthermore, when the friction pair rotates at high speed, a large amount of heat will be generated, which will cause local high temperature in the fluid pumping device, resulting in the precipitation of solutes in the perfusion fluid, such as glucose or sodium chloride. And the local high temperature will also affect the properties of the fluid in the target environment, and even affect the normal operation of the fluid in the target environment.

[0047] To this end, an embodiment of the present invention provides a new cable device 305 for an invasive medical device, wherein an infusion tube 101 and a drainage tube 102 are integrated inside the cable device for the invasive medical device; the infusion liquid is used to inhibit blood from entering the pumping device, and the waste liquid from the infusion is used to flush particles, take away heat, lubricate friction pairs, etc. It is advantageous that the inner diameter of the infusion tube is larger than the inner diameter of the drainage tube. It is understandable that only a part of the infusion liquid enters the drainage tube as waste liquid and is discharged, so its discharged flow rate is smaller than the flow rate in the infusion tube. Therefore, in order to reduce the overall radial dimension of the sheath unit, the diameters of the infusion tube and the drainage tube can be distinguished, so that the inner diameter of the drainage tube is smaller than the inner diameter of the infusion tube. This distinction in inner diameter is also beneficial to the operator, so that the operator can simply distinguish the two pipelines by observing the diameters, and eliminate the problem of incorrectly connecting the two pipelines. When the radial dimension difference between the infusion tube and the drainage tube is too large, it will lead to uneven arrangement of the pipelines inside the cable, thereby affecting the structural strength of the cable device for the invasive medical device. Therefore, in a preferred embodiment, the perfusion tube and the drainage tube are designed with the same or substantially the same size; for example, the outer diameter of the perfusion tube and the drainage tube is the same or substantially the same. In addition, considering that the flow rate in the perfusion tube is different from the flow rate in the drainage tube, the inner diameter of the perfusion tube can be appropriately increased and the inner diameter of the drainage tube can be reduced to coordinate the difference in flow between the two. Advantageously, when the inner diameter of the drainage tube is reduced, its tube wall will be thickened, which can provide more stable support for the cable device of the interventional medical device, enhance the structural strength, and ensure the safety and reliability of the pipeline in the cable device of the interventional medical device. In some other embodiments, the perfusion tube and the drainage tube of the same size can also be used, and the flow difference between the two can be coordinated by adjusting the number of the perfusion tube and the drainage tube. For example, the perfusion tube is set to 2 and the drainage tube is set to 1, or the perfusion tube is set to 3 and the drainage tube is set to 2, etc. The number here is only an example. In actual use, its value can be flexibly adjusted as needed to meet the use requirements. The distal end of the drainage tube is connected to the waste liquid discharge channel in the fluid pumping device, and the distal end of the perfusion tube is connected to the perfusion channel of the fluid pumping device. The perfusion liquid entering the fluid pumping device through the perfusion tube will be split, with one part being discharged into the target environment through the perfusion channel of the fluid pumping device, and the other part entering the waste liquid discharge channel, entering and being used to flush the friction pairs such as bearings, thereby discharging the particles generated by wear and the heat generated by friction out of the fluid pumping device, and after entering the drainage tube, being discharged from the proximal end of the cable device of the interventional medical device. Figure 1In the illustrated embodiment, the cable device of the invasive medical device further includes a cable protective layer and an optical fiber unit; the cable protective layer and the optical fiber unit are generally configured as a multi-layer structure so that the cable device of the invasive medical device has sufficient strength. For example, the cable protective layer may include a cable coat 109, a shielding layer 108, and a rubber coating 107. The optical fiber unit generally includes a central optical fiber 103 and an optical fiber protective layer 104 coated on the outside of the optical fiber 103. The optical fiber unit is used to connect an optical fiber sensor to receive and transmit optical signals. The optical fiber protective layer 104 may be made of insulating materials such as PI, silica gel, PVC, TPU, and EVA. The cable protective layer is used to realize the signal shielding, insulation, and electromagnetic interference resistance of the cable as a whole. The rubber coating layer can be composed of PTFE, FEP, TPE and other materials, and its wall thickness is between 0.05-1.5mm; the shielding layer can be formed by twisting metal wires, and the material can be stainless steel, nickel titanium, copper wire, etc.; the material of the cable outer coat can be PVC, PA12, TPU, PU, ​​PE, PEBAX, PP, FEP, PTFE, EVA, etc. In a preferred embodiment, the outer diameter of the cable protective layer can range from 2mm to 10mm. The cable protective layer includes a first hollow portion extending along the axis of the cable protective layer; the optical fiber unit is arranged in the first hollow portion, and the axis passes through the optical fiber unit. The purpose of the above-mentioned optical fiber unit layout is to control the optical fiber unit to be located as much as possible in the center of the first hollow portion. Figure 1As shown, in an ideal assembly, the axis of the optical fiber unit coincides with the axis of the first hollow part, that is, it is located at the center of the first hollow part. In fact, due to installation errors, the axis of the optical fiber unit and the axis of the first hollow part will not coincide, but in a preferred embodiment, the axis of the first hollow part needs to be controlled to pass through the optical fiber unit. It can be understood that since the optical fiber is a brittle material, it is at risk of breaking when it is excessively bent, or it is also at risk of breaking under the action of external impact loads. For this reason, when the optical fiber unit is set near the axis of the first hollow part, the optical fiber unit is far away from the outer surface of the cable device of the invasive medical device in all directions of the circumference, and the bending radius in all directions is relatively uniform, and it is not easy to break due to a small bending radius. In addition, the optical fiber unit at this position is far away from the outer surface of the cable device of the invasive medical device, so it is far away from the external impact load and is not easily damaged by the external load. Further, the perfusion tube and the drainage tube are arranged around the optical fiber unit; the optical fiber unit, the perfusion tube and the drainage tube extend along the axis respectively. The surrounding setting here includes that at least one of the irrigation tube and the drainage tube is arranged in contact with the outer surface of the optical fiber unit, or is arranged at a certain distance from the optical fiber unit. In the above-mentioned setting, the optical fiber unit, the irrigation tube and the drainage tube always extend in the same direction. Advantageously, the material properties of the irrigation tube and the drainage tube themselves can support the surrounded optical fiber unit and prevent it from being bent and damaged. The fluid flowing inside the irrigation tube and the drainage tube can also partially absorb the external load and reduce the impact force on the optical fiber unit. It can be seen that in this embodiment, the installation position of the optical fiber unit and its layout relationship with the irrigation tube and the drainage tube effectively ensure the safety of the optical fiber unit and improve the reliability of the cable unit. Compared to Figure 8 The prior art shown in FIG. 1 shows that the cable device of the invasive medical device of the present invention can be installed in Figure 3 In the pumping system, Figure 3 In the solution shown, the perfusion tube and the drainage tube are integrated into the cable device of the interventional medical device, thereby avoiding the perfusion tube and the drainage tube forming an independent line (i.e. Figure 8The composite cable forms another line, which effectively reduces the problem of perfusion fluid leakage caused by connection failure at the side branch line. At the same time, it also effectively reduces the risk of users tripping due to two discrete lines, which leads to perfusion fluid leakage. At the same time, the integrated pipeline also solves the problem of repeated bending loads on the perfusion tube and the drainage tube when the patient stands up and lies down in the prior art, and avoids the perfusion tube and the drainage tube being subjected to torsional and pulling forces due to repeated bending or gravity, which eventually leads to perfusion fluid leakage, and causes many problems such as failure of the perfusion circuit and the flushing circuit. Preferably, the outer contour of the cross section of the cable device is annular, wherein the cross section is perpendicular to the axis. Exemplarily, the annular shape includes but is not limited to a circle, an ellipse, etc.

[0048] In an optional embodiment, the cable device of the interventional medical device further includes an electric wire unit; the electric wire unit is disposed in the first hollow portion and is disposed close to the optical fiber unit, and the electric wire unit extends along the axis. The electric wire unit is disposed in the first hollow portion so as to effectively utilize the protective effect of the cable protective layer and prevent the electric wire unit from being damaged. In practice, the electric wire unit is usually made of metal material, which has sufficient mechanical strength. Therefore, arranging the electric wire unit close to the optical fiber unit can fully utilize the mechanical strength of the electric wire unit to protect the optical fiber unit, prevent the optical fiber unit from being damaged under overload conditions, and improve the overall structural strength of the cable device of the interventional medical device.

[0049] In an optional embodiment, the irrigation tube and the drainage tube are arranged in the first hollow portion and close to the optical fiber unit. Figure 1 In the embodiment shown, the irrigation device and the drainage device are further arranged in the first hollow part, and the cable protective layer is fully utilized to protect the irrigation pipe and the drainage pipe, thereby reducing the risk of leakage. At the same time, the irrigation pipe and the drainage pipe are attached to the surface of the optical fiber unit, which can enhance the protection effect of the optical fiber unit and further reduce the probability of damage to the optical fiber unit.

[0050] In an optional embodiment, the wire units include at least two, and in the projection of a plane perpendicular to the axis, the wire units surround the optical fiber unit and are symmetrically distributed; and / or, in the projection of a plane perpendicular to the axis, the irrigation tube and the drainage tube are distributed at both ends of the optical fiber unit in the radial direction. Figure 1The embodiment shown shows a cross-sectional schematic diagram perpendicular to the axis, wherein when multiple wire units 105 are provided, they are surrounded by the optical fiber unit and close together, and the symmetrically distributed layout can provide protection for the optical fiber unit at multiple angles. Correspondingly, the irrigation tube and drainage tube shown can also be arranged in a symmetrical distribution relative to the optical fiber unit. In a preferred embodiment, the irrigation tube, drainage tube and optical fiber unit shown are distributed along the same diameter. This layout can improve the roundness of the cable device of the interventional medical device and is conducive to structural support. Of course, the irrigation tube and drainage tube can also be arranged adjacently, with an angle between them ranging from 10° to 350°. In some embodiments, the irrigation tube and drainage tube can be made of the same or different materials, and the materials of the two can be one of PVC, PA12, TPU, PU, ​​PE, PEBAX, PP, FEP, PTFE, EVA, etc. In some embodiments, the outer diameter of the irrigation tube and drainage tube is between 1-3mm, and the inner diameter is between 0.6-2.8mm. At the same time, in order to prevent the perfusion tube and the drainage tube from getting tangled or squeezed due to external forces such as kinking, stretching, squeezing, and bending in the cable device of the interventional medical device, and causing hydraulic changes, the perfusion tube and the drainage tube should have a suitable hardness. Exemplarily, the hardness range may be 85A-75D, preferably 55D-75D.

[0051] In an optional embodiment, the cable protective layer further includes a second hollow portion extending along the axis of the cable protective layer; the second hollow portion serves as the irrigation pipe or drainage pipe. In practice, the wire units often have the same outer diameter and the same mechanical strength. Directly abutting and evenly distributing them on the surface of the optical fiber unit can provide stable support and protection for the optical fiber unit, and the protection effect in the circumferential direction is the same. In order to avoid destroying the integrity and protection effect of the above-mentioned assembly layout, a second hollow portion can be provided in the cable protective layer as an irrigation pipe or drainage pipe. For example, the second hollow portion serves as one of the irrigation pipe or drainage pipe, and the other is abutted against the surface of the optical fiber unit in the form of an independent pipe, or installed at other positions away from the optical fiber unit. In some other embodiments, an independent irrigation pipe or an independent drainage pipe can also be installed in the second hollow portion; or both the independent irrigation pipe and the independent drainage pipe can also be installed in the second hollow portion. The second hollow portion as an irrigation pipe or drainage pipe can effectively isolate the liquid delivery pipeline from the wire unit to avoid affecting the work of the wire unit when liquid leaks. At the same time, the use of independent perfusion tubes or drainage tubes is avoided, thereby reducing the complexity of the structure and the production cost.

[0052] In an optional embodiment, the cable protective layer further includes a second hollow portion and a third hollow portion extending along the axis of the cable protective layer; the second hollow portion serves as an infusion pipe, and the third hollow portion serves as a drainage pipe. Figure 2In the embodiment described above, the second hollow part and the third hollow part are arranged at intervals to provide support and protection for the optical fiber unit from different angles and directions. Of course, in some embodiments, an independent irrigation pipe and an independent drainage pipe can also be installed in the second hollow part and the third hollow part respectively.

[0053] In an optional embodiment, the cable protective layer includes a rubber coating, a shielding layer and a cable jacket, wherein the rubber coating, the shielding layer and the cable jacket are sequentially arranged from the inside to the outside. The rubber coating is tightly attached to the outer surface of the wire unit and / or the irrigation tube and / or the drainage tube, so that the wire unit and / or the irrigation tube and / or the drainage tube are stably supported on the surface of the optical fiber unit.

[0054] In an optional embodiment, the second hollow part and / or the third hollow part is arranged in the cable outer jacket. Figure 2 In the illustrated embodiment, since the cable jacket is made of polymer material and has sufficient strength and thickness, it is more appropriate to arrange the second hollow part and / or the third hollow part here. Furthermore, being arranged inside the cable jacket can avoid damage to the shielding layer and effectively ensure the integrity of the cable protective layer function. The second hollow part and the third hollow part can be distributed at both ends of the same diameter, or arranged adjacently, with an angle of 10°-350° between them. At the same time, depending on the actual injection pressure and the suction pressure, the number of the first hollow part and the second hollow part can be set to one or more, preferably 1-3 each.

[0055] In an optional embodiment, the cable device of the invasive medical device further comprises a retractable outer tube; the irrigation tube and the drainage tube extend close to the outer surface of the cable protective layer; the cable protective layer, the irrigation tube and the drainage tube are covered in the retractable outer tube. Figure 4 and 5 In the illustrated embodiment, the irrigation tube 101 and the drainage tube 102 are both arranged outside the cable protective layer of the cable device of the interventional medical device. It can be understood that the cable device of the interventional medical device is composed of two parts as a whole, namely, the cable protective layer and the components inside it are one part, and the irrigation tube and the drainage tube constitute the other part. The two parts are covered by a shrinkable outer tube 401 to form a complete cable device of the interventional medical device. Exemplarily, the shrinkable outer tube 401 is a heat shrink tube. After the irrigation tube and the drainage tube are placed outside the cable protective layer, all the components are put into the heat shrink tube, and the heat shrink tube is heated. The heat shrink tube shrinks when heated to shape the internal pipeline to prevent the irrigation tube and the drainage tube from loosening or shifting relative to the cable protective layer. The wall thickness of the shrinkable outer tube is between 0.02-0.5mm, and the material can be PTFE, silicone, PEBAX, PE, etc. Compared to Figure 1 and Figure 2 The embodiment shown, Figure 4 The cable device of the invasive medical device shown in the embodiment shown has low processing requirements, low cost investment, and is simpler and more practical. It does not need to design the size of the cable protective layer in advance, and only needs to select a suitable retractable outer tube. In addition, the user can adjust the number of irrigation tubes and drainage tubes as needed, and select the appropriate size of the retractable sleeve based on the number and the size of the cable protective layer. In other words, the user can flexibly adjust the number of irrigation tubes and drainage tubes as needed, which greatly enhances the flexibility and scope of application of the cable device assembly of the invasive medical device.

[0056] In an optional embodiment, the cable device of the invasive medical device further comprises a winding unit; the irrigation tube and the drainage tube extend close to the outer surface of the cable protective layer; the winding unit is wound around the outside of the cable protective layer, the irrigation tube and the drainage tube. Figure 6 and 7 In the embodiment shown, a winding unit 601 is provided, which integrates the infusion pipe, the drainage pipe, the cable protective layer and the components located in the cable protective layer into a whole. Figure 4 Similar to the embodiment shown, the device in this embodiment is also divided into two parts, and the two parts are tightly fixed together by a winding unit. Figure 4 The embodiments shown are different. Figure 6 In the embodiment shown, it is not necessary to insert each component from one end of the retractable outer tube, but the winding unit can be directly wrapped on the outermost layer, which shortens the assembly time, improves the flexibility of installation, and enables operators to perform assembly operations without complicated installation equipment.

[0057] In an optional embodiment, a filling unit 106 is provided in the first hollow portion. After the above-mentioned wire unit and optical fiber unit and other devices are provided in the cable protective layer, since the components usually have a cylindrical external structure, there are still many gaps in the cable protective layer. Even by optimizing the structure and layout of each component, the gaps cannot be eliminated. The gaps will cause the components in the cable protective layer to twist or move, etc., especially when subjected to external loads, which will not only cause damage to the internal components, but also cause them to move or sway. For this reason, in some embodiments of the present invention, a filling unit is provided in the gap to solve this problem. The filling unit is filled outside the wire unit, optical fiber unit, irrigation tube, drainage tube, etc., so as to protect each component, constrain its position, buffer the external impact load, and enable each component in the cable protective layer to work normally. The filling unit can be made of cotton wool, cloth, silicone and other materials.

[0058] The second aspect of the present invention provides a pumping system, wherein the pumping device includes a sheath 301, and the sheath is connected to the cable device of any interventional medical device described in the first aspect. It is understandable that the sheath 301 is inserted into the human body when in use. The sheath has pipelines adapted to the various components in the cable device of the interventional medical device to connect the irrigation tube, the drainage tube, the optical fiber unit, the wire unit, etc. The cable device of the interventional medical device is placed outside the human body and connected to the equipment end, so that the operator can control the pumping unit in the body at the proximal end.

[0059] The above specific implementation methods do not constitute a limitation on the scope of protection of the present invention. After considering the specification and practicing the technical solutions disclosed in this application, those skilled in the art will easily think of other implementation methods of the present disclosure. This application is intended to cover any modification, use or adaptive changes of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the technical field that are not disclosed in the present disclosure. The description and examples are regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0060] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A cable device for an interventional medical device, Features: It includes a cable protective layer, an optical fiber unit, an irrigation tube and a drainage tube; The cable protective layer has a first hollow portion extending along its axial direction; The optical fiber unit is arranged in the first hollow portion, and the axis passes through the optical fiber unit; The irrigation tube and the drainage tube are arranged around the optical fiber unit; The optical fiber unit, the perfusion tube and the drainage tube extend in the same direction.

2. The cable device for an invasive medical device according to claim 1, characterized in that: The cable device of the interventional medical device also includes a wire unit; The wire unit is arranged in the first hollow portion and close to the optical fiber unit, and the wire unit extends along the axial direction.

3. The cable device for an invasive medical device according to claim 2, characterized in that: The irrigation tube and the drainage tube are arranged in the first hollow part and close to the optical fiber unit.

4. The cable device for an invasive medical device according to claim 3, characterized in that: The wire units include at least two wires, and in the projection of a plane perpendicular to the axis, the wire units surround the optical fiber unit and are symmetrically distributed; and / or, in the projection of a plane perpendicular to the axis, the irrigation tube and the drainage tube are distributed at both ends of the optical fiber unit in the radial direction.

5. The cable device for an invasive medical device according to claim 1, characterized in that: The cable protective layer further comprises a second hollow portion extending along the axial direction of the cable protective layer; The second hollow part serves as the perfusion tube or the drainage tube.

6. The cable device for an invasive medical device according to claim 1, characterized in that: The cable protective layer further comprises a second hollow portion and a third hollow portion extending along the axial direction of the cable protective layer; The second hollow part serves as the perfusion tube, and the third hollow part serves as the drainage tube.

7. The cable device for an invasive medical device according to claim 5 or 6, characterized in that: The cable protection layer comprises a rubber coating layer, a shielding layer and a cable outer coat, wherein the rubber coating layer, the shielding layer and the cable outer coat are sequentially sleeved from the inside to the outside.

8. The cable device for an invasive medical device according to claim 7, characterized in that: The second hollow part and / or the third hollow part are arranged in the cable outer coat.

9. The cable device for an invasive medical device according to claim 1, characterized in that: The cable device for the invasive medical device also includes a retractable outer tube; The irrigation pipe and the drainage pipe extend close to the outer surface of the cable protective layer; The cable protective layer, the perfusion pipe and the drainage pipe are covered in the shrinkable outer tube.

10. The cable device for an invasive medical device according to claim 1, characterized in that: The cable device for the interventional medical device further comprises a winding unit; The irrigation pipe and the drainage pipe extend close to the outer surface of the cable protective layer; The winding unit is wound around the outside of the cable protective layer, the perfusion pipe and the drainage pipe.

11. The cable device for an invasive medical device according to any one of claims 1-6, 9-10, characterized in that: A filling unit is arranged in the first hollow part.

12. A pumping system, characterized in that: It comprises a sheath tube, and the sheath tube is connected to the cable device of the interventional medical device according to any one of claims 1-11.

Images