Coaxial cable for low-temperature medical treatment

Abstract

The coaxial cable comprises an inner conductor, an insulating layer, an outer conductor, a first sheath layer and a second sheath layer which are sequentially arranged from inside to outside, an electronic wire and a cooling pipe are arranged between the first sheath layer and the second sheath layer, and the cooling pipe is communicated with a cooling liquid source, so that the cooling liquid is filled into the cooling pipe. The cooling pipe is used for cooling the cable, a cabling protection layer is wound on the electronic wire and the cooling pipe, and the cabling protection layer is coated with the second sheath layer; through the above mode, the cable can be cooled when in use, and the cable can satisfy a low-temperature environment when in use.

Description

Technical Field

[0001] This utility model relates to the field of cables for medical equipment, and in particular to a coaxial cable for cryogenic medical use. Background Technology

[0002] Medical bundled coaxial cables, as core components for radio frequency signal transmission in medical equipment, are widely used in high-frequency surgical equipment, radiofrequency ablation devices, ultrasound diagnostic instruments, and electrocardiographs. They transmit high-frequency or bioelectrical signals to achieve precise treatment or diagnosis of patient tissues. In existing technologies, these cables are typically formed by weaving radiofrequency coaxial cables with several electronic wires to create a bundled structure, protected by an outer sheath to balance electrical performance, mechanical strength, and anti-interference capabilities. However, in medical applications, especially with high-power equipment (such as high-power radiofrequency ablation devices) or equipment requiring low-temperature operation (such as cryotherapy devices and low-temperature surgical instruments), existing cables have significant drawbacks: First, traditional medical bundled coaxial cables are prone to heat accumulation due to resistance loss during high-power signal transmission, leading to increased cable temperature. This temperature rise not only exacerbates signal attenuation and reduces transmission quality but may also cause equipment malfunctions or even safety hazards. Second, existing cable designs are often not optimized for low-temperature environments, resulting in insufficient heat dissipation and making them unsuitable for medical scenarios requiring continuous low-temperature operation. For example, during cryotherapy, if the cable cannot effectively dissipate heat or maintain a low temperature, local temperature fluctuations may affect the treatment effect and even lead to a decline in equipment performance. Utility Model Content

[0003] The main technical problem solved by this utility model is to provide a coaxial cable for cryogenic medical use, which can cool the cable during use and enable the cable to meet the requirements of low-temperature environments.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: providing a coaxial cable for cryogenic medical use, comprising an inner conductor, an insulation layer, an outer conductor, a first sheath layer, and a second sheath layer arranged sequentially from the inside to the outside. An electronic wire and a cooling pipe are disposed between the first sheath layer and the second sheath layer. The cooling pipe is connected to a coolant source, so that the coolant is filled into the cooling pipe. The cooling pipe is used to cool the cable. A cable protection layer is wound around the electronic wire and the cooling pipe. The second sheath layer covers the cable protection layer.

[0005] Preferably, an outer shielding layer is provided between the cable protection layer and the second sheath layer. The outer shielding layer is a tin-plated copper wire braided layer, thereby reducing external electromagnetic interference.

[0006] Preferably, the inner conductor is made of soft copper wire, thereby ensuring the flexibility of the cable.

[0007] Preferably, the insulation layer is a low-density PTFE wrapping tape, which ensures that the cable transmits high-power signals while having low attenuation.

[0008] Preferably, the outer conductor includes a double-sided self-adhesive aluminum foil layer and a second tin-plated copper wire braided layer, with the aluminum foil layer covering the insulating layer and the second tin-plated copper wire braided layer covering the aluminum foil layer.

[0009] Preferably, the first sheath layer includes an inner protective layer and an outer protective layer. The inner protective layer is a PTFE wrapping tape, and the outer protective layer is a polyester tape. The inner protective layer is wrapped around a second tinned copper wire braided layer, and the outer protective layer is wrapped around the inner protective layer.

[0010] Preferably, the cooling pipe is made of polyurethane material.

[0011] Preferably, the electronic wire is made of stranded tin-plated copper wire.

[0012] Preferably, the second sheath layer covers the outer shielding layer, and the second sheath layer is made of polyurethane.

[0013] Preferably, the cable protection layer is PTFE wrapping tape.

[0014] The beneficial effects of this utility model are: by bundling cooling pipes inside the cable and filling the cooling pipes with liquid nitrogen, the liquid nitrogen carries away a large amount of heat generated during the use of the cable, thereby greatly reducing the temperature of the cable during use and enabling the cable to adapt to medical scenarios with low-temperature operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] The components in the attached diagram are labeled as follows:

[0017] 1. Inner conductor; 2. Insulation layer; 3. Outer conductor; 31. Aluminum foil layer; 32. Second tinned copper wire braided layer; 4. First sheath layer; 41. Inner protective layer; 42. Outer protective layer; 5. Second sheath layer; 6. Electronic wire; 7. Cooling pipe; 8. Cable protection layer; 9. Outer shielding layer. Detailed Implementation

[0018] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0019] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0021] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0022] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0023] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0024] Unless otherwise specified, physical quantities in formulas should be understood as basic quantities of SI base units, or derived quantities derived from basic quantities through mathematical operations such as multiplication, division, differentiation, or integration.

[0025] Example:

[0026] refer to Figure 1 A coaxial cable for cryogenic medical applications includes, from the inside out, an inner conductor 1, an insulation layer 2, an outer conductor 3, a first sheath layer 4, and a second sheath layer 5. An electronic wire 6 and a cooling pipe 7 are disposed between the first sheath layer 4 and the second sheath layer 5. The cooling pipe 7 is connected to a coolant source, allowing coolant (such as liquid nitrogen) to fill it. The cooling pipe 7 uses liquid nitrogen to cool the radio frequency coaxial cable and improve the cryogenic environment. A cabling protective layer 8, made of PTFE (polytetrafluoroethylene) wrapping tape, is wound around the electronic wire 6 and the cooling pipe 7, thus cabling the electronic wire 6, cooling pipe 7, and coaxial cable. Using the cabling protective layer 8 to fix the cable ensures its roundness, and replacing traditional non-woven fabric with PTFE wrapping tape improves the cable's flame retardancy and flexibility. The second sheath layer 5 covers the cabling protective layer 8, providing protection for the cable. The inner conductor 1 uses soft copper wire to ensure the cable's flexibility. Cooling pipe 7 is made of medical-grade polyurethane material, and multiple cooling pipes 7 can be arranged. Electronic wire 6 plays a role in electrical transmission. Electronic wire 6 uses stranded tinned copper wire, which ensures flexibility while improving the mechanical strength of the cable. Eight electronic wires 6 can be arranged, and their colors are: white, blue, orange, green, brown, red, black, and yellow. The sheath of electronic wire 6 can be made of PVC flame-retardant material, which can increase the current carrying capacity of electronic wire 6.

[0027] refer to Figure 1 An outer shielding layer 9 is wrapped between the cable protection layer 8 and the second sheath layer 5. The outer shielding layer 9 can be a tin-plated copper wire braided layer, thereby reducing external electromagnetic interference and ensuring the signal distortion during medical treatment.

[0028] refer to Figure 1 The insulation layer 2 is a low-density PTFE wrapping tape, which ensures that the cable has extremely low attenuation while transmitting signals with high power.

[0029] refer to Figure 1 The outer conductor 3 includes a double-sided self-adhesive aluminum foil layer 31 and a second tinned copper wire braided layer 32. The aluminum foil layer 31 is wrapped on the insulation layer 2, and the second tinned copper wire braided layer 32 is wrapped on the aluminum foil layer 31, thereby achieving a double-layer shielding effect. This allows the cable's shielding efficiency to reach over 90dB, effectively reducing signal radiation loss and external interference.

[0030] refer to Figure 1 The first sheath layer 4 includes an inner protective layer 41 and an outer protective layer 42. The inner protective layer 41 is a PTFE (polytetrafluoroethylene) wrapping tape, and the outer protective layer 42 is a polyester tape. The inner protective layer 41 is wrapped around the second tinned copper wire braided layer 32, and the outer protective layer 42 is wrapped around the inner protective layer 41. The first sheath layer 4 is made by wrapping the PTFE wrapping tape in the left direction and then wrapping the polyester tape in the right direction. This not only reduces the weight and size of the cable, but more importantly, it ensures the heat dissipation and cooling of the cable, which is conducive to the heat exchange between the liquid nitrogen in the cooling pipe 7 and the first sheath layer 4.

[0031] refer to Figure 1 The second sheath layer 5 covers the outer shielding layer 9, and the second sheath layer 5 is made of polyurethane material.

[0032] refer to Figure 1 The cable protection layer 8 can be PTFE (polytetrafluoroethylene) wrapping tape.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A coaxial cable for cryogenic medical use, characterized in that, The cable includes an inner conductor (1), an insulation layer (2), an outer conductor (3), a first sheath layer (4), and a second sheath layer (5) arranged sequentially from the inside to the outside. An electronic wire (6) and a cooling pipe (7) are arranged between the first sheath layer (4) and the second sheath layer (5). The cooling pipe (7) is connected to a coolant source, so that coolant is filled into the cooling pipe (7). The cooling pipe (7) is used to cool the cable. A cable protection layer (8) is wound on the electronic wire (6) and the cooling pipe (7). The second sheath layer (5) covers the cable protection layer (8).

2. The coaxial cable for cryogenic medical use according to claim 1, characterized in that: An outer shielding layer (9) is provided between the cable protection layer (8) and the second sheath layer (5). The outer shielding layer (9) is a tin-plated copper wire braided layer, thereby reducing external electromagnetic interference.

3. A coaxial cable for cryogenic medical use according to claim 1, characterized in that: The inner conductor (1) is a soft copper wire, thereby ensuring the flexibility of the cable.

4. A coaxial cable for cryogenic medical use according to claim 1, characterized in that: The insulation layer (2) is a low-density PTFE wrapping tape, which ensures that the cable has low attenuation while transmitting signals with high power.

5. A coaxial cable for cryogenic medical use according to claim 1, characterized in that: The outer conductor (3) includes a double-sided self-adhesive aluminum foil layer (31) and a second tin-plated copper wire braided layer (32). The aluminum foil layer (31) covers the insulating layer (2), and the second tin-plated copper wire braided layer (32) covers the aluminum foil layer (31).

6. A coaxial cable for cryogenic medical use according to claim 5, characterized in that: The first sheath layer (4) includes an inner protective layer (41) and an outer protective layer (42). The inner protective layer (41) is a PTFE wrapping tape, and the outer protective layer (42) is a polyester tape. The inner protective layer (41) is wrapped around the second tin-plated copper wire braided layer (32), and the outer protective layer (42) is wrapped around the inner protective layer (41).

7. A coaxial cable for cryogenic medical use according to claim 1, characterized in that: The cooling pipe (7) is made of polyurethane material.

8. A coaxial cable for cryogenic medical use according to claim 1, characterized in that: The electronic wire (6) is made of stranded tin-plated copper wire.

9. A coaxial cable for cryogenic medical use according to claim 1, characterized in that: The second sheath layer (5) covers the outer shielding layer (9), and the second sheath layer (5) is made of polyurethane.

10. A coaxial cable for cryogenic medical use according to claim 1, characterized in that: The cable protection layer (8) is a PTFE wrapping tape.

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