Low-noise biocompatibility-resistant flexible movable medical signal line

Abstract

A low-noise biological-compatibility-resistant flexible movable medical signal line relates to the field of medical signal lines and comprises at least seven groups of line cores, one group of line cores is located at the central position of the medical signal line, the other groups of line cores are annularly twisted outside the central group, each group of line core is composed of a conductor, an insulating layer and a shielding layer, and the insulating layer is arranged outside the central group. A plurality of groups of wire cores jointly form a cable core of the medical signal wire, a semi-conductive belting layer is arranged outside the wire cores, the semi-conductive belting layer is spirally wound on the outer wall of the cable core, a noise reduction layer is arranged outside the semi-conductive belting layer, and the noise reduction layer is composed of a damping layer, an anti-interference layer and an absorption layer. According to the scheme, the problem that a medical signal line is prone to signal distortion due to noise interference of the medical signal line is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of medical signal lines, in particular to a low-noise, biocompatible, flexible and movable medical signal line. Background Technique

[0002] A medical signal line refers to a line used to transmit sensing information and control information in medical equipment. It is usually a bundle or multiple bundles of transmission lines composed of multiple cable lines. The conductors of medical signal lines usually adopt multi-strand annealed bare copper conductors or alloy copper conductors, and can also adopt conductors with tin plating or silver plating. The selection of insulating materials is crucial for the performance of medical signal lines. Commonly used insulating materials include polyolefins, perfluoroethylene-propylene copolymer, etc. In order to reduce the influence of external electromagnetic interference on signal transmission, medical signal lines usually have a shielding layer. Medical signal lines are specifically used in medical equipment such as surgical robots, endoscopes, monitors, etc. to ensure accurate communication between devices or between components within a device.

[0003] For example, the Chinese authorized patent "A High-Temperature-Resistant Medical Equipment Signal Line" with the publication number CN205487493U includes a rubber sleeve, a wire, a protective film, a metal film, a strong fiber, a copper wire braid, a first connector, and a second connector. It can avoid the signal line from melting and failing at high temperatures, and the copper wire braid shields the signal line to prevent external signals from interfering with the signal line and causing the signal line to fail.

[0004] In actual use, the above-mentioned existing technologies are prone to noise interference, which will cause the signals transmitted by medical signal lines to be distorted, resulting in inaccurate information received by the equipment, and thus affecting the normal operation of the equipment. Therefore, they do not meet the existing requirements. For this reason, we propose a low-noise, biocompatible, flexible and movable medical signal line. Content of the Utility Model

[0005] The purpose of the utility model is to provide a low-noise, biocompatible, flexible and movable medical signal line to solve the problem that the medical signal line is prone to signal distortion due to its own noise interference as mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A low-noise, biocompatible, flexible and movable medical signal line includes a core. There are at least seven groups of cores, one of which is located at the central position of the medical signal line, and the remaining groups are annularly stranded outside the central group. Each group of cores consists of a conductor, an insulating layer, and a shielding layer. Multiple groups of cores together form the cable core of the medical signal line. A semiconductive tape layer is arranged outside the cores, and the semiconductive tape layer is spirally wound around the outer wall of the cable core. A noise reduction layer is arranged outside the semiconductive tape layer. The noise reduction layer consists of a damping layer, an anti-interference layer, and an absorption layer. An outer sheath is wrapped outside the noise reduction layer.

[0007] Preferably, the conductor is formed by stranding a plurality of hard-state tin-plated silver-copper alloy single wires together, and the insulating layer is extruded outside the conductor.

[0008] Preferably, the shielding layer includes an inner shielding layer and an outer shielding layer. The inner shielding layer is a copper braid layer, which is woven in a net shape on the outer wall of the insulating layer. The outer shielding layer is an aluminum foil, which is wound around the outer wall of the inner shielding layer.

[0009] Preferably, the semi-conductive tape layer is a graphene semi-conductive tape.

[0010] Preferably, the damping layer is extruded on the outer wall of the semi-conductive tape layer, the anti-interference layer is wound around the outer wall of the damping layer, and the absorption layer is fixed on the outer wall of the anti-interference layer through an adhesive.

[0011] Preferably, the outer sheath is made of polyurethane and is coated on the outside of the noise reduction layer through an extrusion device.

[0012] Preferably, a filler is provided in the gap between the wire cores, and the filler is made of glass fiber material.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. In order to improve the signal transmission ability, the conductor of the present utility model is composed of multiple strands of fine-stranded single wires, and the material is selected as hard-state tin-plated silver-copper alloy. Compared with ordinary copper conductors, it can be suitable for frequently moving use environments, and at the same time, its conductivity is much higher than that of ordinary copper conductors. At the same time, the insulating layer is uniformly coated on the outer layer of the conductor by high-strength PE material. After being modified by electron beam radiation, it can protect the conductor from being disconnected due to external forces and temperature changes during frequent movement, thereby extending the service life of the wire. At the same time, the high insulation resistance of the material also provides a guarantee for long-term use. At the same time, multiple pairs of core wire signal groups are adopted to enhance the signal transmission function.

[0015] 2. In order to solve electromagnetic interference, the present utility model uses graphene semi-conductive tape, which greatly improves the electromagnetic interference that may exist during the use of the wire and provides a guarantee for the accurate detection of medical equipment. At the same time, in terms of structure, each pair of individual shielding cooperates with the total shielding, greatly enhancing the effect of draining off crosstalk noise.

[0016] 3. By providing a noise reduction layer, the composite noise reduction layer starts from three aspects: physical sound absorption, electromagnetic shielding and shock absorption, comprehensively reducing the noise interference received by the signal wire, ensuring the high definition and stability of signal transmission, reducing noise interference means reducing distortion during signal transmission, improving the accuracy and reliability of medical equipment, extending the service life of the signal wire, reducing the risk of damage caused by vibration, and at the same time meeting the medical-grade biocompatibility requirements to ensure patient safety. Brief Description of the Drawings

[0017] Figure 1 is a perspective view of the present utility model;

[0018] Figure 2 is a left view of the present utility model;

[0019] Figure 3 is a schematic diagram of the internal structure of the present utility model;

[0020] Figure 4 is a schematic diagram of the semi-conductive tape layer structure of the present utility model.

[0021] In the figure: 1, core wire; 11, conductor; 12, insulating layer; 13, shielding layer; 2, semi-conductive tape layer; 3, noise reduction layer; 31, damping layer; 32, anti-interference layer; 33, absorption layer; 4, outer sheath; 5, filler. Detailed Description of the Preferred Embodiment

[0022] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0023] Please refer to Figures 1-4 , an embodiment provided by the present utility model: a low-noise, biocompatible, flexible and movable medical signal line, including a core wire 1. There are at least seven groups of core wires 1, one of which is located at the central position of the medical signal line, and the remaining groups are helically stranded outside the central group. Each group of core wires 1 is composed of a conductor 11, an insulating layer 12 and a shielding layer 13. Multiple groups of core wires 1 together form the cable core of the medical signal line. An outer semi-conductive tape layer 2 is provided outside the core wire 1, and the semi-conductive tape layer 2 is helically wound around the outer wall of the cable core. A noise reduction layer 3 is provided outside the semi-conductive tape layer 2. The noise reduction layer 3 is composed of a damping layer 31, an anti-interference layer 32 and an absorption layer 33. An outer sheath 4 is wrapped outside the noise reduction layer 3.

[0024] Please refer to Figure 3 , the conductor 11 is composed of multiple hard-state tin-plated silver-copper alloy single wires stranded together. The insulating layer 12 is extruded outside the conductor 11. The hard-state tin-plated silver-copper alloy single wires have relatively high hardness and strength, which enables them to withstand certain mechanical stresses and bending during the application of the medical signal line, and are not easily broken or deformed, improving the durability and reliability of the signal line. The insulating PE is irradiated and modified to greatly improve the high-temperature resistance and insulation characteristics of the insulating medium, and better adapt to the electromagnetic environment adaptability of long-term current conduction. Multiple pairs of core wire groups enhance the signal transmission function.

[0025] Please refer to Figure 3, the shielding layer 13 includes an inner shielding layer and an outer shielding layer. The inner shielding layer is a copper braid layer, which is woven in a mesh shape on the outer wall of the insulating layer 12. The outer shielding layer is an aluminum foil, which is wrapped around the outer wall of the inner shielding layer. The copper braid layer has good electrical conductivity and electromagnetic shielding performance, and can effectively suppress electromagnetic interference from both inside and outside the conductor. The copper braid layer has a mesh structure, which can wrap the insulating layer in all directions, reducing the leakage and intrusion of electromagnetic waves. The aluminum foil, as the outer shielding layer, can further enhance the electromagnetic shielding performance of the cable. The high electrical conductivity and reflectivity of the aluminum foil enable it to reflect and absorb high-frequency electromagnetic waves, thus protecting the internal signals of the cable from external interference.

[0026] Furthermore, the semiconductive tape layer 2 is a graphene semiconductive tape. The resistivity of graphene is extremely low, even lower than that of traditional conductor materials such as copper and silver. This property enables the graphene semiconductive tape to significantly reduce resistance, improve current transmission efficiency, effectively homogenize the electric field distribution in the cable, and reduce the tip effect and local strong electric field caused by the multi-strand stranding of the conductor in cable applications. This helps to reduce the partial discharge amount of the cable and improve the insulation level. By improving the electric field distribution, the graphene semiconductive tape can also reduce the electromagnetic radiation pollution of the cable and minimize the interference to the surrounding environment and other electronic devices.

[0027] Please refer to Figure 3 and Figure 4 , the damping layer 31 is extruded on the outer wall of the semiconductive tape layer 2, the anti-interference layer 32 is wound and coated on the outer wall of the damping layer 31, and the absorption layer 33 is fixed on the outer wall of the anti-interference layer 32 by an adhesive. The damping layer 31 is made of butyl rubber, which can absorb and disperse the mechanical stress caused by the bending, movement or external vibration of the signal wire, reduce the noise generated by vibration, and protect the internal conductor and insulating layer from damage; the anti-interference layer 32 is an electromagnetic shielding nanocomposite film, a nanocomposite film formed by combining metal nanoparticles and a polymer substrate, which not only has excellent electromagnetic shielding performance and can effectively block external electromagnetic interference, but also maintains a certain flexibility and lightness due to its nanoscale structure, without affecting the overall flexibility and mobility of the signal wire; the absorption layer 33 is a polymer sound-absorbing foam material, specifically a polyvinyl alcohol-based microporous foam, which has a large number of tiny holes inside and can effectively absorb and dissipate noise waves. Through the physical sound-absorbing mechanism, it can significantly reduce the mechanical noise interference of the external environment to the signal wire and improve the signal purity.

[0028] Please refer to Figure 1 , the outer sheath 4 is made of polyurethane material and is coated on the outside of the noise reduction layer 3 through an extrusion device. It uses a modified medical-grade soft and highly elastic polyether-type polyurethane that meets biocompatibility and can contact human skin; the polyether-type polyurethane material has extremely strong hydrolysis resistance, and at the same time, the polyurethane material has high strength, high resilience, high wear resistance and acid and alkali resistance, which can adapt to the long-term use of the wire in a medical environment and improve safety.

[0029] Please refer to Figure 3 , a filler 5 is provided in the gap between the wire cores 1. The filler 5 is made of fiberglass material and has high tensile strength and anti-bending performance, which can enhance the mechanical strength of the cable and make it not easily damaged during movement and bending.

[0030] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A low-noise, biocompatible, flexible and movable medical signal line, comprising a wire core (1). There are at least seven groups of wire cores (1), one of which is located at the central position of the medical signal line, and the remaining groups are annularly stranded outside the central group. It is characterized in that: Each group of the wire cores (1) is composed of a conductor (11), an insulating layer (12) and a shielding layer (13). Multiple groups of wire cores (1) together form the core of the medical signal cable. An outer semiconductive tape layer (2) is provided outside the wire core (1), and the semiconductive tape layer (2) is spirally wound around the outer wall of the cable core. A noise reduction layer (3) is provided outside the semiconductive tape layer (2), and the noise reduction layer (3) is composed of a damping layer (31), an anti-interference layer (32) and an absorption layer (33). An outer sheath (4) is wrapped outside the noise reduction layer (3).

2. The low-noise biocompatible flexible movable medical signal line according to claim 1, characterized in that: The conductor (11) is formed by stranding multiple hard-state tin-plated silver-copper alloy single wires together, and the insulating layer (12) is extruded outside the conductor (11).

3. A low-noise, biocompatible, flexible and movable medical signal line according to claim 2, characterized in that: The shielding layer (13) includes an inner shielding layer and an outer shielding layer. The inner shielding layer is a copper braid layer, and the inner shielding layer is woven in a mesh shape on the outer wall of the insulating layer (12). The outer shielding layer is an aluminum foil, and the outer shielding layer is wound around the outer wall of the inner shielding layer.

4. A low-noise, biocompatible, flexible and movable medical signal line according to claim 1, characterized in that: The semiconductive tape layer (2) is a graphene semiconductive tape.

5. A low-noise, biocompatible, flexible and movable medical signal line according to claim 1, characterized in that: The damping layer (31) is extruded on the outer wall of the semiconductive tape layer (2), the anti-interference layer (32) is wound and coated on the outer wall of the damping layer (31), and the absorption layer (33) is fixed on the outer wall of the anti-interference layer (32) by an adhesive.

6. A low-noise, biocompatible, flexible and movable medical signal line according to claim 1, characterized in that: The outer sheath (4) is made of polyurethane and is coated outside the noise reduction layer (3) through an extrusion device.

7. A low-noise, biocompatible, flexible and movable medical signal line according to claim 1, characterized in that: A filler (5) is provided in the gap between the wire cores (1), and the filler (5) is made of glass fiber material.

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