Medical composite catheter

Abstract

The application discloses a medical composite catheter, which comprises a tube body, the tube body comprises an inner layer, a middle supporting layer and an outer layer, the tube body is provided with an expansion detection assembly at the end, a plurality of movable pull wires are arranged between the middle supporting layer and the outer layer, the expansion detection assembly comprises at least two ring bodies, the pull wires pass through one of the ring bodies and are connected to the other ring body, a plurality of elastic members are arranged between the two ring bodies through which the pull wires pass, the plurality of ring bodies are covered with an elastic film, a plurality of detection units are arranged on the elastic film, the plurality of pull wires are pulled at the same time to drive the elastic members to bend, so that the expansion detection assembly expands outward, and the detection unit comprises a temperature sensor and a pressure sensor. The expansion detection assembly is arranged at the end of the tube body, the detection units are arranged on the expansion detection assembly, the plurality of pull wires are pulled at the same time to drive the elastic members to bend, the elastic film expands outward, is closely attached to soft tissues, and the temperature and the pressure can be detected at the same time.

Description

Technical Field

[0001] This invention relates to the field of medical composite catheters, and specifically to a medical composite catheter. Background Technology

[0002] Currently, multilayer medical composite catheters represent a significant achievement in modern medical technology, playing a crucial role in various medical applications such as interventional therapy, diagnostic imaging, and drug delivery. With advancements in minimally invasive surgical techniques and increasing patient demands for treatment effectiveness and comfort, the design and manufacturing of multilayer composite catheters are continuously being improved and developed.

[0003] Existing composite catheters have high mechanical rigidity or insufficient flexibility, which prevents them from fitting tightly to the contact interface with soft tissue, resulting in inaccurate detection and limited functionality. Consequently, in a single situation, multiple catheters need to be inserted and guided for surgery to achieve multifunctional monitoring and treatment. Summary of the Invention

[0004] To address the aforementioned problems, this invention proposes a medical composite catheter, which solves the shortcomings of existing composite catheters, such as excessive mechanical rigidity or insufficient flexibility, which prevents them from tightly adhering to the contact interface with soft tissue, resulting in inaccurate detection and limited functionality. Consequently, multiple catheters need to be inserted and guided in a single procedure to achieve multifunctional monitoring and treatment.

[0005] The technical solution adopted in this invention is as follows: A medical composite catheter includes a tube body comprising an inner layer, a middle support layer, and an outer layer. An expansion detection assembly is provided at the end of the tube body. Multiple movable pull wires are installed between the middle support layer and the outer layer. The expansion detection assembly includes at least two rings. The pull wires pass through one ring and connect to the other. Multiple elastic elements are disposed between the two rings passing through the pull wires. An elastic membrane covers the exterior of the multiple rings, and multiple detection units are mounted on the elastic membrane. Simultaneous pulling of the multiple pull wires causes the elastic elements to bend, thereby expanding the expansion detection assembly outwards. The detection units include a temperature sensor and a pressure sensor.

[0006] This invention provides an expansion detection component at the end of the tube, which includes a detection unit. By simultaneously pulling multiple wires, the elastic element bends, causing the elastic membrane to expand outward and adhere tightly to the soft tissue. It can also simultaneously detect temperature and pressure, thus solving the problem of the single function of existing medical composite catheters, which necessitates the insertion and guidance of multiple catheters in a single procedure. This invention enables multifunctional monitoring and treatment.

[0007] Preferably, the elastic element includes an inner portion and an outer portion, with the inner portion having a lower bending stiffness than the outer portion, making it easier to bend. This invention, by making the inner portion have a lower bending stiffness than the outer portion, allows the inner side of the elastic element to bend more easily when the cable is pulled, thus causing the elastic element to protrude outwards.

[0008] Preferably, the inner layer is made of polyethylene pipe, or the intermediate support layer is made of stainless steel, nickel-titanium, or polymer filaments in a three-dimensional braid or spiral winding, or the outer layer is made of polymer material film.

[0009] Optionally, two of the pull wires include a conductive inner core and an outer sliding layer, and the two pull wires are connected to an external power source.

[0010] Optionally, two of the pull wires include a conductive inner core and an outer sliding layer, and these two pull wires are connected to a mobile power source inside the medical composite catheter.

[0011] Optionally, one of the rings includes a first conductive ring, an insulating ring, and a second conductive ring, with the insulating ring located between the first and second conductive rings. The first conductive ring is connected to the conductive core of one of the pull wires, and the second conductive ring is connected to the conductive core of the other pull wire. Each detection unit is simultaneously connected to the first and second conductive rings via a tension wire strip.

[0012] Optionally, a temperature sensor is provided on the ring at the end, and the two terminals of the temperature sensor are respectively connected to the conductive core of one pull wire and the conductive core of the other pull wire.

[0013] Optionally, the stretchable conductor strip includes an insulated strip body with curved, movable conductors on both sides of the strip body.

[0014] Optionally, a temperature sensor is provided between the wires on both sides.

[0015] Optionally, the outer layer of multiple rings is provided with a conductive layer, the conductive core of one pull wire is connected to the conductive layer of one ring, the conductive core of another pull wire is connected to the conductive layer of another ring, and each detection unit is connected to the conductive layer of one ring and the conductive layer of another ring simultaneously through a tension wire strip.

[0016] The beneficial effects of the present invention include at least the following: 1. This invention provides an expansion detection component at the end of the tube. The expansion detection component is equipped with a detection unit. By simultaneously pulling multiple wires, the elastic element bends, causing the elastic membrane to expand outward and adhere tightly to the soft tissue, making the detection more accurate. It can also detect temperature and pressure simultaneously, solving the problem of the single function of existing medical composite catheters, which leads to the need to insert and guide multiple catheters in a single situation, in order to achieve multifunctional monitoring and treatment.

[0017] 2. In this invention, the pull wire serves two purposes: firstly, it connects the first conductive ring and the second conductive ring; secondly, it guides the bending of the medical composite catheter.

[0018] 3. The present invention has a temperature sensor between the wires on both sides, which has a flatter structure and frees up more area to place the pressure sensor. The temperature sensor here can fix a single end of the wire so that it can be better connected to the tape.

[0019] 4. The present invention provides a ring body comprising a first conductive ring, an insulating ring, and a second conductive ring. Each ring body has multiple functions, including a fixed expansion structure and conductivity. Its structure is ingenious and does not require additional conductive or supporting structures.

[0020] 5. The present invention provides curved and movable wires on both sides of the belt, allowing the wires to extend along the elastic membrane.

[0021] 6. In this invention, the two rings are connected to the conductive circuit separately, which allows the size of the rings themselves to be further reduced, making them suitable for manufacturing smaller medical composite catheters. Attached Figure Description

[0022] Figure 1 This is a partial structural diagram of the medical composite catheter of Embodiment 1 of the present invention; Figure 2 This is a three-dimensional structural diagram of the medical composite catheter of Embodiment 1 of the present invention; Figure 3 This is a partial structural diagram of the drawstring of the medical composite catheter according to Embodiment 1 of the present invention; Figure 4 This is an internal structural diagram of the medical composite catheter of Embodiment 1 of the present invention; Figure 5 This is a perspective view of the elastic element of the medical composite catheter according to Embodiment 1 of the present invention; Figure 6 This is a perspective view of the stretched guide strip of the medical composite catheter according to Embodiment 1 of the present invention; Figure 7 This is a three-dimensional structural diagram of the medical composite catheter of Embodiment 2 of the present invention; Figure 8 This is an internal structural diagram of the medical composite catheter of Embodiment 2 of the present invention; Figure 9 This is a perspective view of the stretched guide strip of the medical composite catheter according to Embodiment 3 of the present invention.

[0023] The labels for the attached figures are as follows: 1. Inner layer, 2. Intermediate support layer, 3. Outer layer, 4. Expansion detection component, 5. Pull wire, 6. Ring body, 7. Elastic element, 8. Elastic membrane, 9. Detection unit, 10. Conductive inner core, 11. Outer sliding layer, 12. Inner side, 13. Outer side, 14. First conductive ring, 15. Insulating ring, 16. Second conductive ring, 17. Temperature sensor, 18. Strip body, 19. Wire, 20. Conductive layer, 21. Pull wire cavity, 22. Tension wire strip, 100. Tube body. Detailed Implementation

[0024] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0025] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] This invention discloses a medical composite catheter, comprising a tube body, which includes an inner layer, a middle support layer, and an outer layer. An expansion detection component is provided at the end of the tube body. Multiple movable pull wires are installed between the middle support layer and the outer layer. The expansion detection component includes at least two rings, with the pull wires passing through one ring and connecting to the other. Multiple elastic elements are disposed between the two rings passing through the pull wires. An elastic membrane covers the exterior of the multiple rings, and multiple detection units are mounted on the elastic membrane. Simultaneous pulling of the multiple pull wires causes the elastic elements to bend, thereby expanding the expansion detection component outwards. The detection units include a temperature sensor and a pressure sensor.

[0028] The pressure sensor of this invention is a thin-film sensor, which can be the PXS16 series from Puhui Technology, with a size of 0.3mm to 1mm.

[0029] In some embodiments, the elastic element includes an inner portion and an outer portion, with the inner portion having less bending stiffness than the outer portion, meaning the inner portion is more easily bent than the outer portion. Different materials can be used here, and the inner portion can be made thinner or more directly in the middle.

[0030] In some embodiments, the inner layer is made of ultra-thin ultra-high molecular weight polyethylene pipe, or the intermediate support layer is made of stainless steel, nickel-titanium, or polymer filaments in a three-dimensional braid or spiral winding, or the outer layer is made of polymer material coating.

[0031] In some embodiments, the two pull wires include a conductive inner core and an outer sliding layer, and the two pull wires are connected to an external power source.

[0032] In some embodiments, the two pull wires include a conductive inner core and an outer sliding layer, and the two pull wires are connected to a mobile power source inside the medical composite catheter.

[0033] In some embodiments, one of the ring bodies includes a first conductive ring, an insulating ring, and a second conductive ring. The first conductive ring is connected to the conductive core of one of the pull wires, and the second conductive ring is connected to the conductive core of the other pull wire. Each detection unit is connected to both the first and second conductive rings via a tension wire strip.

[0034] In some embodiments, a temperature sensor is provided on the ring at the end, and the two terminals of the temperature sensor are respectively connected to the conductive core of one pull wire and the conductive core of the other pull wire.

[0035] In some embodiments, the tension conductor strip includes an insulated strip body with flexible, movable conductors on both sides. The strip body typically has closed or semi-closed retaining rings to prevent conductor detachment; alternatively, mounting holes may be provided on the inner surface of the strip body to facilitate conductor passage.

[0036] In some embodiments, a temperature sensor is provided between the wires on both sides. The temperature sensor here can be a Nanochip NST112X (0.75*0.75mm) or a similar DS18B20.

[0037] In some embodiments, the outer layers of multiple rings are provided with conductive layers, wherein the conductive core of one pull wire is connected to the conductive layer of one ring, the conductive core of another pull wire is connected to the conductive layer of another ring, and each detection unit is connected to the conductive layer of one ring and the conductive layer of another ring simultaneously by a stretching wire strip.

[0038] Example 1:

[0039] The technical solution adopted in this invention is as follows: like Figure 1 , Figure 2 As shown, this invention discloses a medical composite catheter, including a tube body 100. The tube body includes an inner layer 1, a middle support layer 2, and an outer layer 3. An expansion detection component 4 is provided at the end of the tube body. Two movable pull wires 5 are installed between the middle support layer and the outer layer. The expansion detection component includes two rings 6. The pull wire passes through one ring and connects to the other ring. Multiple elastic elements 7 are arranged between the two rings passing through the pull wire. The rings are covered with an elastic membrane 8, and multiple detection units 9 are installed on the elastic membrane. When the multiple pull wires are pulled simultaneously, they cause the elastic elements to bend, thereby causing the expansion detection component to expand outward. The detection units include temperature sensors and pressure sensors. The pull wire is fixedly connected to the ring at the end, while the end of the tube body is connected to another ring (not located at the end of the pull wire).

[0040] In this embodiment, to prevent the cable pulling system from affecting the patency of the catheter lumen, a cable pulling cavity 21 is provided between the intermediate support layer and the outer layer. This cavity is located between the braided layer of the catheter body and the outer sheath, ensuring both the smooth operation of the cable pulling system and the cleanliness and functionality of the catheter lumen. The cable pulling cavity is made of polyetheretherketone (PEEK) or lubricated polytetrafluoroethylene material, significantly reducing the frictional resistance of the cable pulling movement.

[0041] like Figure 3 As shown, the two pull wires include a conductive inner core 10 and an outer sliding layer 11, and these two pull wires are connected to the power source inside the medical composite catheter.

[0042] like Figure 5 As shown, the elastic element includes an inner portion 12 and an outer portion 13, with the bending stiffness of the inner portion being less than that of the outer portion.

[0043] The inner layer is made of ultra-thin ultra-high molecular weight polyethylene pipe, or the middle support layer is made of stainless steel, nickel-titanium, and polymer filaments in three-dimensional weaving or spiral winding, or the outer layer is made of polymer material coating.

[0044] like Figure 4 As shown, one of the ring bodies includes a first conductive ring 14, an insulating ring 15, and a second conductive ring 16. The insulating ring is located between the first and second conductive rings. The first conductive ring is connected to the conductive core of one of the pull wires, and the second conductive ring is connected to the conductive core of the other pull wire. Each detection unit is simultaneously connected to the first and second conductive rings via a tension wire strip 22. The wires on both sides are connected to the first and second conductive rings, respectively.

[0045] A temperature sensor 17 is provided on the ring at the end. The two terminals of the temperature sensor are respectively connected to the conductive core of one pull wire and the conductive core of the other pull wire.

[0046] like Figure 6 As shown, the stretchable conductor strip includes an insulated strip body 18, and curved, movable conductors 19 are provided on both sides of the strip body.

[0047] The surface of the ring at the end is coated with an insulating coating or insulating layer.

[0048] In this embodiment, the medical composite catheter is bent by pulling one of the pull wires individually. Pulling both wires simultaneously causes the elastic element to bend outwards, expanding the elastic membrane. This allows the temperature and pressure sensors on the membrane to make close contact with the soft tissue, resulting in more accurate detection. The temperature and pressure sensors can be directly powered via the pull wires, eliminating the need for additional wiring and resulting in a more compact structure.

[0049] Example 2:

[0050] The difference between Example 2 and Example 1 is that, as Figure 7 and Figure 8 As shown, each of the multiple rings has a conductive layer 20 on its outer layer. The conductive core of one pull wire connects to the conductive layer of one ring, and the conductive core of another pull wire connects to the conductive layer of another ring. Each detection unit is simultaneously connected to the conductive layers of one and another rings via a tension wire strip. The wires on both sides connect to the conductive layers of one and another rings, respectively. The surface of the rings at the ends is coated with an insulating coating or insulating layer.

[0051] In this embodiment, the two rings are connected to the conductive circuit separately, which allows the size of the rings themselves to be further reduced, making them suitable for manufacturing smaller medical composite catheters.

[0052] Example 3:

[0053] The difference between Example 3 and Example 1 is that, as Figure 9 As shown, a temperature sensor is installed between the wires on both sides. The two ends of the temperature sensor are connected to wires respectively.

[0054] Example 4:

[0055] The difference between Example 4 and Example 1 is that the two pull wires in Example 4 include a conductive inner core and an outer sliding layer. These two pull wires are connected to a mobile power source inside the medical composite catheter. The mobile power source is a lithium battery. This lithium battery is generally located on the operating handle connected to the outside of the medical composite catheter.

[0056] The above description is merely a preferred embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent structural transformations made based on the description and drawings of the present invention, whether directly or indirectly applied to other related technical fields, are similarly included within the scope of protection of the present invention.

Claims

1. A medical composite catheter, characterized in that, The device includes a tube body comprising an inner layer, a middle support layer, and an outer layer. An expansion detection assembly is located at the end of the tube body. Multiple movable pull wires are installed between the middle support layer and the outer layer. The expansion detection assembly includes at least two rings. The pull wires pass through one ring and connect to the other. Multiple elastic elements are disposed between the two rings passing through the pull wires. An elastic membrane covers the outside of the multiple rings, and multiple detection units are mounted on the elastic membrane. Simultaneous pulling of the multiple pull wires causes the elastic elements to bend, thereby expanding the expansion detection assembly outwards. The detection unit includes a temperature sensor and a pressure sensor. Each pull wire includes a conductive inner core and an outer sliding layer. One ring includes a first conductive ring, an insulating ring, and a second conductive ring. The insulating ring is located between the first and second conductive rings. The first conductive ring connects to the conductive inner core of one pull wire, and the second conductive ring connects to the conductive inner core of the other pull wire. Each detection unit is simultaneously connected to the first and second conductive rings via a tension wire strip.

2. The medical composite catheter as described in claim 1, characterized in that, The elastic element includes an inner part and an outer part, and the bending stiffness of the inner part is less than that of the outer part.

3. A medical composite catheter as described in claim 1, characterized in that, The inner layer is made of polyethylene pipe, or the middle support layer is made of stainless steel, nickel-titanium, or polymer filaments in a three-dimensional braid or spiral winding, or the outer layer is made of polymer material coating.

4. A medical composite catheter as described in claim 1, characterized in that, These two pull wires are connected to an external power source.

5. A medical composite catheter as described in claim 1, characterized in that, The two pull wires are connected to the mobile power source inside the medical composite catheter.

6. A medical composite catheter as described in claim 1, characterized in that, A temperature sensor is provided on the ring at the end. The two terminals of the temperature sensor are respectively connected to the conductive core of one pull wire and the conductive core of the other pull wire.

7. A medical composite catheter as described in claim 1, characterized in that, The stretched conductor strip includes an insulated strip body with curved, movable conductors on both sides of the strip body.

8. A medical composite catheter as described in claim 7, characterized in that, The temperature sensor is positioned between the wires on both sides.

9. A medical composite catheter, characterized in that, The device includes a tube body comprising an inner layer, a middle support layer, and an outer layer. An expansion detection assembly is located at the end of the tube body. Multiple movable pull wires are installed between the middle support layer and the outer layer. The expansion detection assembly includes at least two rings. The pull wires pass through one ring and connect to the other. Multiple elastic elements are disposed between the two rings passing through the pull wires. An elastic membrane covers the outside of the multiple rings, and multiple detection units are mounted on the elastic membrane. Simultaneous pulling of the multiple pull wires causes the elastic elements to bend, thereby expanding the expansion detection assembly outwards. Each detection unit includes a temperature sensor and a pressure sensor. The two pull wires include a conductive inner core and an outer sliding layer. The outer layers of the multiple rings are all provided with conductive layers. The conductive inner core of one pull wire connects to the conductive layer of one ring, and the conductive inner core of another pull wire connects to the conductive layer of another ring. Each detection unit is simultaneously connected to the conductive layers of one ring and another ring via a tension wire.

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