High reliability medical defibrillation electrode composite cable

Abstract

The application provides a high-reliability composite cable for medical defibrillation electrodes, and relates to the field of cables; the composite cable comprises a connected sheath structure, a double high-voltage transmission unit and a differential signal unit arranged side by side in the connected sheath structure; the double high-voltage transmission unit comprises two non-insulated high-voltage conductors arranged at intervals; the differential signal unit comprises two differential signal conductors arranged in a twisted manner; the non-insulated high-voltage conductors and the differential signal conductors are both embedded with reinforced fiber bodies; the connected sheath structure comprises three sheath bodies connected side by side in sequence, and the three sheath bodies are respectively arranged outside the two non-insulated high-voltage conductors and the differential signal unit in a sleeving manner. The application can reduce high-voltage loop impedance, reduce signal loop crosstalk, and improve bending life and tensile strength.

Description

Technical Field

[0001] This utility model relates to the field of cables, and in particular to a composite cable for a high-reliability medical defibrillation electrode. Background Technology

[0002] During cardiac defibrillation and cardioversion, a transient high-energy pulse acts on the heart, typically lasting 4–10 ms, with an energy of 40–400 J (joules). A sufficiently large current is output from the defibrillator, flowing through the high-voltage leads in the defibrillator cable to the defibrillator electrodes. This current flows through the heart to stimulate the myocardium, causing all myocardial cells to depolarize simultaneously and enter a refractory period. This facilitates the restoration of synchronized contraction of the fibrillated myocardium, restoring normal heart function. This method is used for various patients requiring immediate defibrillation. One end of the cable connects to the defibrillator electrodes, and the other end connects to the defibrillator via a connector.

[0003] However, traditional defibrillator electrode cables have the following technical drawbacks: the high-voltage circuit conductor is prone to breakage under frequent bending; the signal line has insufficient anti-interference capability, leading to false triggering; the overall structure has poor tensile strength (generally <30kg); and it has poor adaptability to medical environments, such as insufficient resistance to disinfection. Utility Model Content

[0004] In view of the above problems, embodiments of the present invention are proposed to provide a highly reliable composite cable for medical defibrillation electrodes that overcomes or at least partially solves the above problems.

[0005] A high-reliability composite cable for medical defibrillation electrodes includes an integrated sheath structure and dual high-voltage transmission units and differential signal units arranged in parallel inside the integrated sheath structure.

[0006] The dual high-voltage transmission unit includes two non-insulated high-voltage conductors spaced apart.

[0007] The differential signal unit includes two twisted differential signal conductors;

[0008] Both the non-insulated high-voltage conductor and the differential signal conductor are embedded with reinforcing fibers;

[0009] The integrated sheath structure includes three sheath bodies connected in parallel in sequence. The three sheath bodies are respectively fitted outside the two non-insulated high-voltage conductors and outside the differential signal unit.

[0010] Preferably, the non-insulated high-voltage conductor comprises four bundles of tin-plated copper wire alloy, wherein each bundle of tin-plated copper wire alloy is composed of multiple tin-plated copper wires and aramid fibers.

[0011] Preferably, each tin-plated copper wire alloy bundle is composed of 61 tin-plated copper wires with a diameter of 0.052 mm and 400D aramid fiber.

[0012] Preferably, the differential signal unit further includes two filler wires, which are disposed within the twisted gap of the two differential signal conductors.

[0013] Preferably, the differential signal conductor is covered with an FEP insulating layer.

[0014] Preferably, each of the differential signal conductors comprises a bundle of seven tin-plated copper wires, wherein each bundle of tin-plated copper wires is composed of multiple tin-plated copper wires and nylon reinforcing fibers.

[0015] Preferably, the thickness of the FEP insulation layer is 0.9 mm; each tin-plated copper wire alloy bundle is composed of 11 tin-plated copper wires with a diameter of 0.5 mm and 250D nylon reinforcing fibers; the filler wire is 1500D aramid fiber.

[0016] Preferably, the three sheaths are connected by connecting ribs, the thickness of which is 0.15mm±0.02mm.

[0017] Preferably, the diameter of the sheath corresponding to the non-insulated high-voltage conductor is 2.5 mm, and the diameter of the sheath corresponding to the differential signal unit is 2.8 mm.

[0018] Preferably, the three sheaths are made of medical-grade PVC material.

[0019] This application specifically includes the following advantages:

[0020] In the embodiments of this application, a one-piece sheath structure and dual high-voltage transmission units and differential signal units arranged in parallel within the one-piece sheath structure are used. The dual high-voltage transmission units include two spaced-apart non-insulated high-voltage conductors; the differential signal units include two stranded differential signal conductors; both the non-insulated high-voltage conductors and the differential signal conductors are embedded with reinforcing fibers; the one-piece sheath structure includes three sheaths connected in parallel in sequence, which are respectively fitted over the two non-insulated high-voltage conductors and the differential signal units. The non-insulated design of the high-voltage conductors reduces system impedance, improves transmission efficiency and system stability; the embedded fiber composite reinforcement in the non-insulated high-voltage conductors and differential signal units improves mechanical strength, and the twisted structure of the differential signal units ensures signal integrity and improves anti-interference capability. The unique one-piece sheath design independently covers the non-insulated high-voltage conductors and differential signal units, and combined with the composite reinforcement of the conductors, allows the product to maintain a large tensile strength while remaining ultra-thin, improving bending resistance and tensile strength, resulting in significantly better performance than similar products. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this application, the drawings used in the description of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of the composite cable for the high-reliability medical defibrillation electrode of this utility model;

[0023] Reference numerals: 1. Dual high-voltage transmission unit; 11. Non-insulated high-voltage conductor; 2. Differential signal unit; 21. Differential signal conductor; 211. FEP insulation layer; 22. Filler wire; 3. Integrated sheath structure; 31. Sheath body; 32. Connecting rib. Detailed Implementation

[0024] To make the objectives, features, and advantages of this application more apparent and understandable, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0025] Reference Figure 1 The diagram shows a structural schematic of a high-reliability medical defibrillation electrode composite cable of the present invention, which may specifically include the following structure: a one-piece sheath structure 3 and a dual high-voltage transmission unit 1 and a differential signal unit 2 arranged in parallel inside the one-piece sheath structure;

[0026] The dual high-voltage transmission unit 1 includes two non-insulated high-voltage conductors 11 spaced apart;

[0027] The differential signal unit 2 includes two twisted differential signal conductors 21;

[0028] Both the non-insulated high-voltage conductor 11 and the differential signal conductor 21 are embedded with reinforcing fibers;

[0029] The integrated sheath structure 3 includes three sheath bodies 31 connected in parallel in sequence. The three sheath bodies 31 are respectively fitted outside the two non-insulated high-voltage conductors 11 and outside the differential signal unit 2.

[0030] In the embodiments of this application, a single-piece sheath structure 3 and dual high-voltage transmission units 1 and differential signal units 2 arranged in parallel inside the single-piece sheath structure are used. The dual high-voltage transmission units 1 include two spaced-apart non-insulated high-voltage conductors 11; the differential signal units 2 include two twisted differential signal conductors 21; both the non-insulated high-voltage conductors 11 and the differential signal conductors 21 are embedded with reinforcing fibers; the single-piece sheath structure 3 includes three sheath bodies 31 connected in parallel, which are respectively fitted outside the two non-insulated high-voltage conductors 11 and the differential signal units 2. The non-insulated design of the high-voltage conductors reduces system impedance, improves transmission efficiency and system stability; the fiber composite reinforcement embedded in the non-insulated high-voltage conductors 11 and the differential signal units 2 improves mechanical strength, and the twisted structure of the differential signal units 2 ensures signal integrity and improves anti-interference capability. The unique integrated sheath design independently covers the non-insulated high-voltage conductor 11 and the differential signal unit 2. Combined with the composite reinforcement of the conductor, the product can achieve a large tensile force while maintaining an ultra-thin size, improving bending resistance and tensile strength, and its performance is significantly better than similar products.

[0031] The following will further describe a composite cable for a high-reliability medical defibrillation electrode in this exemplary embodiment.

[0032] In this embodiment, the composite cable mainly consists of a dual high-voltage transmission unit 1, a differential signal unit 2, and an integrated sheath structure 3. The dual high-voltage transmission unit 1 includes two spaced-apart non-insulated high-voltage conductors 11, each independently covered by a sheath 31, with adjacent sheaths 31 integrally connected. Direct contact between the exposed non-insulated conductors reduces capacitive reactance, improving transmission efficiency and system stability, reducing electromagnetic interference, and the independent sheath design prevents signal crosstalk. The differential signal unit 2 includes two twisted differential signal conductors 21, each covered by a sheath 31, connected in parallel with the other two sheaths 31 to form a connecting sheath structure. The differential signal twisting structure ensures signal integrity, and combined with the independent arrangement of the dual high-voltage transmission unit 1, it enhances signal anti-interference capabilities. Both the non-insulated high-voltage conductor 11 and the differential signal conductor 21 are embedded with reinforcing fibers. The fiber composite reinforcement technology is used to improve mechanical strength. Combined with the twisted pair structure and the outer sheath structure, the overall resistance to bending and breaking and the tensile strength can be improved, thus improving the overall strength.

[0033] As an example, the aforementioned non-insulated high-voltage conductor 11 comprises four bundles of tin-plated copper wire alloy, wherein each bundle is composed of multiple tin-plated copper wires and aramid fibers. Specifically, it uses Heraeus Medical Wire's specially manufactured Sn60-Cu40 alloy wire. Plasma surface treatment enhances the bonding strength of aramid fibers, which can greatly improve the conductor's transmission capacity and strength.

[0034] In one specific embodiment, each tin-plated copper wire alloy bundle is composed of 61 tin-plated copper wires with a diameter of 0.052 mm and 400D aramid fibers.

[0035] As an example, the differential signal unit 2 described above also includes two filler wires 22, that is, 2×1500D filler wires are used to fill the twist gap between the two differential signal conductors 21. Tensile conductors are used to further enhance the strength of the differential signal unit 2. Specifically, the differential signal conductors 21 are twisted using an S+SV3-65 type stranding machine with a constant 40mm pitch right-hand twisting.

[0036] As an example, the differential signal conductor 21 is covered with an FEP insulating layer 211 with a thickness of 0.9 mm ± 0.05 mm, which is marked with two colors.

[0037] In one specific embodiment, each of the differential signal conductors 21 includes a bundle of seven tin-plated copper wires, wherein each bundle of tin-plated copper wires is composed of 11 tin-plated copper wires with a diameter of 0.5 mm and 250D nylon reinforcing fibers.

[0038] As an example, the three sheath bodies 31 are connected by connecting ribs 32, the thickness of which is 0.15mm ± 0.02mm. Preferably, it is set to 0.15mm, and the sheath bodies 31 are connected by a 0.15mm integral structure to achieve stress distribution and optimize strength design.

[0039] As an example, the diameter of the sheath 31 corresponding to the non-insulated high-voltage conductor 11 is 2.5 mm, and the diameter of the sheath 31 corresponding to the differential signal unit 2 is 2.8 mm. All three sheaths 31 are made of medical-grade PVC. Specifically, the integrated sheath structure 3 is formed using medical-grade PVC material through a three-cavity co-extrusion mold (ISO10993 certified), resulting in a cross-sectional dimension of 2.5 × 2.5 × 2.8 mm. This allows the product to achieve a tensile strength of >45 kgf while maintaining an ultra-thin 2.5 mm dimension, and its bending life has been tested to reach 120,000 cycles, significantly superior to similar products.

[0040] The composite cable designed using the above structure and parameters has been tested in practice.

[0041] The resulting mechanical properties are as follows:

[0042] Bending life ≥100,000 cycles (ASTM D4565); tensile strength ≥45 kgf (UL1581 standard).

[0043] The resulting electrical characteristics are as follows:

[0044] High voltage circuit impedance ≤ 0.1Ω / m (10A DC); signal circuit crosstalk ≤ -90dB (1MHz).

[0045] As can be seen from the above data, the embodiments of this application can reduce the impedance of the high voltage circuit, reduce crosstalk in the signal circuit, and improve bending life and tensile strength.

[0046] Beneficial effects of the embodiments in this application:

[0047] The system impedance is reduced through a non-insulated high-voltage conductor design, mechanical strength is enhanced by aramid fiber composite reinforcement technology, and signal integrity is ensured by a differential signal twisted pair structure. The unique one-piece sheath design allows the product to achieve a tensile strength of >45kgf while maintaining an ultra-thin 2.5mm size, and its bending life has been tested to reach 120,000 cycles, significantly outperforming similar products.

[0048] Finally, it should be noted that in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or terminal device. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or terminal device that includes said element.

[0049] The above provides a detailed description of a high-reliability composite cable for medical defibrillation electrodes provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A high-reliability composite cable for medical defibrillation electrodes, characterized in that, It includes an integrated sheath structure and dual high-voltage transmission units and differential signal units arranged side by side inside the integrated sheath structure; The dual high-voltage transmission unit includes two non-insulated high-voltage conductors spaced apart. The differential signal unit includes two twisted differential signal conductors; Both the non-insulated high-voltage conductor and the differential signal conductor are embedded with reinforcing fibers; The integrated sheath structure includes three sheath bodies connected in parallel in sequence. The three sheath bodies are respectively fitted outside the two non-insulated high-voltage conductors and outside the differential signal unit.

2. The high-reliability composite cable for medical defibrillation electrodes according to claim 1, characterized in that, The non-insulated high-voltage conductor comprises four bundles of tin-plated copper wire alloy, wherein each bundle of tin-plated copper wire alloy is composed of multiple tin-plated copper wires and aramid fibers.

3. The high-reliability composite cable for medical defibrillation electrodes according to claim 2, characterized in that, Each tin-plated copper wire alloy bundle is composed of 61 tin-plated copper wires with a diameter of 0.052mm and 400D aramid fiber.

4. The high-reliability composite cable for medical defibrillation electrodes according to claim 1, characterized in that, The differential signal unit also includes two filler wires, which are disposed within the twisted gap of the two differential signal conductors.

5. The high-reliability composite cable for medical defibrillation electrodes according to claim 4, characterized in that, The differential signal conductor is covered with an FEP insulating layer.

6. The high-reliability composite cable for medical defibrillation electrodes according to claim 5, characterized in that, Each of the differential signal conductors comprises a bundle of seven tin-plated copper wires, wherein each bundle of tin-plated copper wires is composed of multiple tin-plated copper wires and nylon reinforcing fibers.

7. The high-reliability composite cable for medical defibrillation electrodes according to claim 6, characterized in that, The thickness of the FEP insulation layer is 0.9 mm; each tin-plated copper wire alloy bundle is composed of 11 tin-plated copper wires with a diameter of 0.5 mm and 250D nylon reinforcing fibers; the filler wire is 1500D aramid fiber.

8. The high-reliability composite cable for medical defibrillation electrodes according to claim 1, characterized in that, The three sheaths are connected by connecting ribs, the thickness of which is 0.15mm±0.02mm.

9. The high-reliability composite cable for medical defibrillation electrodes according to claim 8, characterized in that, The diameter of the sheath corresponding to the non-insulated high-voltage conductor is 2.5 mm, and the diameter of the sheath corresponding to the differential signal unit is 2.8 mm.

10. The high-reliability composite cable for medical defibrillation electrodes according to claim 9, characterized in that, The three sheaths are made of medical-grade PVC.

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