A flexible defibrillation electrode based on three-dimensional fabric structure and its preparation method

Abstract

The present invention discloses a flexible defibrillator electrode based on a three-dimensional fabric structure, relating to the fields of textiles and electronics. The electrode comprises a flexible electrode plate, a tightening strap buckle hole, a power interface, and a power cord. The tightening strap buckle holes are oppositely arranged on either side of the flexible electrode plate, and the power cord is connected to the flexible electrode plate via the power interface. The flexible electrode plate comprises a conductive layer and a base layer. The conductive layer comprises conductive yarns primarily composed of a continuous floating yarn structure, supplemented by hydrophilic modified yarns with a modified original structure for consolidation. The conductive yarns float above the hydrophilic modified yarns and are wavy on the surface of the conductive layer. The hydrophilic modified yarns are used to absorb liquid conductive media before use. The base layer comprises hydrophobic yarns interwoven in warp and weft. The hydrophobic yarns of the base layer and the hydrophilic modified yarns of the conductive layer are connected to form a three-dimensional fabric structure. The structure utilizes the properties of the conductive yarns tightly adhering to the conductive yarns and the modified yarns absorbing the conductive media to achieve the functions of overloading large currents and instantly releasing large amounts of energy.

Description

Technical Field

[0001] The present invention relates to the field of textile and electronic technology, in particular to a flexible defibrillation electrode based on a three-dimensional fabric structure and a preparation method thereof. Background Art

[0002] Based on the current relevant technologies, the structure of the defibrillation electrodes that can be used in medical equipment is mainly a hard plate structure, and the preparation of the material system is generally achieved by combining a metal plate with a conductive coating. This type of defibrillation electrode often needs to be covered with a biocompatible sticky material, such as an electrolyte hydrogel, before use. The electrode covered with the sticky material is pasted to the skin to complete the preparation for electric shock defibrillation. This type of defibrillation electrode has problems such as complicated and cumbersome processing and the conductive coating of the defibrillation electrode is easy to fall off after long-term use. Against the background of the rapid development of portable medical emergency equipment, the hard plate-shaped defibrillation electrode also has problems such as poor moisture conductivity and breathability, poor skin adhesion, and it is difficult to meet the needs of patients wearing it for a long time, which makes the application scenarios of this type of defibrillation electrode relatively limited.

[0003] In addition, judging from the existing technologies related to fabric flexible electrodes, flexible electrodes based on fabric structures are mostly used for collecting bioelectric signals, and there are relatively few technical studies on cardiac defibrillation. Summary of the Invention

[0004] In response to the above-mentioned problems and technical needs, the inventors have proposed a flexible defibrillator electrode based on a three-dimensional fabric structure and a preparation method thereof. Conductive yarn with good biocompatibility and hydrophilic modified yarn are interwoven in the warp and weft of a three-dimensional fabric structure to form a fabric defibrillator electrode. By utilizing the characteristics of the conductive yarn being tightly adhered and the modified yarn absorbing the conductive medium, the functions of overloading large currents and instantly releasing large amounts of energy are achieved.

[0005] The technical solutions of the present invention are as follows:

[0006] A flexible defibrillation electrode based on a three-dimensional fabric structure includes a flexible electrode plate, a tightening strap buckle hole, a power interface, and a power cord. The tightening strap buckle holes are arranged on both sides of the flexible electrode plate. The power cord is connected to the flexible electrode plate through the power interface to provide defibrillation current.

[0007] The flexible electrode plate includes a conductive layer and a base layer. The conductive layer includes conductive yarns mainly composed of continuous floating line tissue, supplemented by hydrophilic modified yarns with changed original tissue for consolidation. The two yarns are interwoven in warp and weft to form a conductive layer, and the conductive yarns float above the hydrophilic modified yarns and are wavy on the surface of the conductive layer. The hydrophilic modified yarns are used to absorb liquid conductive media before use; the base layer includes hydrophobic yarns interwoven in warp and weft. The hydrophobic yarns of the base layer and the hydrophilic modified yarns of the conductive layer are connected to form a three-dimensional fabric structure. When in use, one side of the conductive layer is attached to the skin.

[0008] Its further technical solution is that for the conductive layer, the warp yarns are conductive yarns and hydrophilic modified yarns, and the two are arranged alternately, and all the weft yarns are hydrophilic modified yarns; the conductive yarns and the predetermined hydrophilic modified yarns as the weft yarns are interwoven to form a continuous floating line structure; the hydrophobic yarns as the warp yarns and the hydrophilic modified yarns as the weft yarns are interwoven to form a connecting structure; the conductive yarns are connected in parallel in sequence, one end of the power cord is connected to any conductive yarn, and the other end is connected to an AC power supply.

[0009] Its further technical solution is that the conductive yarn includes stainless steel filaments or yarns, pure silver filaments or yarns, and filaments or yarns with a coating metal of gold, silver, copper, nickel, aluminum, and zinc; the hydrophilic modified yarn includes hydrophilic yarn modified with polyacrylate, starch-acrylate polymer, starch-acrylonitrile graft copolymer, and acrylamide-acrylonitrile-acrylic acid terpolymer resin; and the hydrophobic yarn includes polyester yarn, nylon yarn, bamboo fiber yarn, and spandex yarn.

[0010] Its further technical solution is that the flexible defibrillator electrode also includes a fabric edging, which is interwoven with the edge of the flexible electrode plate to stabilize the flexible electrode plate; the tightening strap buckle holes are relatively arranged on both sides of the fabric edging, and the power interface is arranged on the other sides of the fabric edging.

[0011] A method for preparing a flexible defibrillation electrode based on a three-dimensional fabric structure comprises the following steps:

[0012] Conductive yarn and hydrophilic modified yarn are selected as the warp yarn of the conductive layer, and hydrophilic modified yarn is selected as the weft yarn of the conductive layer; hydrophobic yarn is selected as the warp and weft yarn of the base layer;

[0013] The conductive layer structure is designed to be a conductive yarn with a continuous floating yarn structure as the main component, supplemented by a hydrophilic modified yarn with a modified original structure for consolidation. The weaving machine diagram of the flexible electrode plate is drawn based on the base layer structure and the connecting structure of the conductive layer and the base layer. The weaving machine diagram includes the structure diagram, reed diagram, harness drawing diagram, and pattern plate diagram.

[0014] The warp yarns of the conductive layer and the base layer are sequentially inserted into the healds of the corresponding heald frames according to the reed drawing diagram and the heald drawing diagram, and then the warp yarns inserted into the healds are inserted into the reed teeth according to the predetermined reed insertion rule; the heald lifting order is set on the loom according to the heald lifting rule indicated by the pattern card diagram; the shedding, weft insertion, beating-up, curling, and warp let-off movements are performed in sequence to interweave the warp and weft yarns of each layer to form the conductive layer and the base layer, and the hydrophobic yarn of the base layer and the hydrophilic modified yarn of the conductive layer are connected to form a flexible electrode plate as a whole. The structure of the flexible electrode plate is a three-dimensional fabric structure formed by the upper and lower layers;

[0015] The flexible electrode plate is subjected to a looping treatment so that the conductive yarn of the conductive layer floats above the hydrophilic modified yarn and forms a wavy shape on the surface of the conductive layer;

[0016] Assemble the power interface and power cord, and connect the power cord to the flexible electrode plate through the power interface to provide defibrillation current; open holes on both sides of the flexible electrode plate as tightening belt buckle holes to obtain flexible defibrillation electrodes;

[0017] The assembled flexible defibrillation electrode is placed in a liquid conductive medium, which is absorbed by the hydrophilic modified yarn and wets the adjacent conductive yarn.

[0018] Its further technical solution is that, in the tissue diagram, the squares where the weft yarns of the conductive layer and the warp yarns of the base layer intersect are designed as connecting tissues; the squares where the warp yarns of the conductive layer and the weft yarns of the base layer intersect represent that the warp yarns of the conductive layer are lifted when the weft yarns of the base layer are woven in, so that they do not participate in the interweaving of the base layer.

[0019] A further technical solution is to perform a ring-pulling process on the flexible electrode plate, including:

[0020] The flexible electrode plate is covered on the ring-pulling drum so that the surface of the conductive layer contacts the ring-pulling drum; the end of the hydrophilic modified yarn serving as the warp is tightened, and the tension at the end of the conductive yarn is kept relaxed; the ring-pulling drum is rotated so that the conductive yarn and the needle on the ring-pulling drum move relative to each other, and the conductive yarn is pulled out from the surface of the conductive layer.

[0021] A further technical solution is that the preparation method further comprises:

[0022] The flexible electrode plate after the ring stretching process is fixed and arranged using a pin-plate stenter;

[0023] The flexible electrode plate is cut into pieces according to a predetermined size, and the edges are chamfered.

[0024] A further technical solution is that the preparation method further comprises:

[0025] The cut flexible electrode plate is subjected to a fabric wrapping process, so that the fabric wrapping is interwoven with the edge of the flexible electrode plate to stabilize the flexible electrode plate;

[0026] Holes are opened on both sides of the fabric edge as buckle holes for the tightening strap, and the power interface is assembled on the remaining sides of the fabric edge.

[0027] A further technical solution is that the preparation method further comprises:

[0028] preparing sodium polyacrylate, N,N-dimethylformamide, thermoplastic polyurethane and cotton grey yarn;

[0029] Mixing and stirring thermoplastic polyurethane and N,N-dimethylformamide in predetermined mass fractions to obtain a mixed solution;

[0030] adding a predetermined mass fraction of sodium polyacrylate to a predetermined mass fraction of a mixed solution, stirring and dispersing the mixture in sequence to obtain a dispersed solution;

[0031] The cotton natural yarn is immersed in the dispersion solution, the immersed yarn is placed in a tension drawing device and placed in an oven for drying to obtain the hydrophilic modified yarn.

[0032] The beneficial technical effects of the present invention are:

[0033] In terms of electrode structure design, the present invention uses a fabric flexible electrode plate as the main body and conductive yarn as the conductive medium, solving the problems of complex structure and easy shedding of conductive coating in traditional defibrillation electrodes over time. The floating thread structure and wavy shape greatly increase the contact area between the surface of the conductive layer and the skin, reducing the contact impedance with the skin. Because the hydrophilic modified yarn has good moisture absorption and water retention properties, the absorbed liquid conductive medium is not easy to evaporate and dry, and can remain in the flexible defibrillation electrode plate for a long time, meeting the demand for long-term wear of portable medical devices. Based on the full infiltration of the liquid conductive medium, the overall impedance of the fabric flexible electrode plate is further reduced, realizing the defibrillation function of overloading large currents and instantaneously releasing large amounts of energy.

[0034] In terms of processing flow, the present invention replaces traditional plate electrodes with woven structure electrodes, the processing flow is short, and the processed flexible electrode plates are lighter and thinner. The selected fabric raw materials have good biocompatibility, certain sweat and moisture conduction functions, and have the advantages of water resistance, oxidation resistance, and good air permeability. It is easy to attach to various complex curved surfaces and meet the use requirements of portable medical emergency equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a structural diagram of the flexible defibrillation electrode provided by this application.

[0036] Figure 2 Schematic diagram of the structure of the flexible electrode plate provided in this application, wherein: (a) is a cross-sectional schematic diagram within a tissue circulation, (b) is an enlarged schematic diagram of a part of the structure, and (c) is a structural schematic diagram within a tissue circulation.

[0037] Figure 3 This is a drawing showing the effect of the pull ring of the flexible electrode plate provided in this application.

[0038] Figure 4 This is a flow chart for preparing the flexible defibrillation electrode provided in this application.

[0039] Figure 5 This is a diagram of the organization of each part of the flexible electrode plate provided in this application, wherein: (a) is the conductive layer organization, (b) is the base layer organization, and (c) is the connecting organization.

[0040] Figure 6 This is a weaving machine diagram of the flexible electrode plate provided in this application, wherein: (a) is the organization diagram, (b) is the reed drawing diagram, (c) is the weft drawing diagram, and (d) is the pattern plate diagram. DETAILED DESCRIPTION

[0041] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0042] This embodiment provides a flexible defibrillation electrode based on a three-dimensional fabric structure, such as Figure 1 As shown, it includes a flexible electrode plate 1, a tightening belt buckle hole 2, a power interface 3 and a power cord 4, and optionally, a fabric edging 5. The fabric edging 5 is interwoven with the edge of the flexible electrode plate 1 to stabilize the flexible electrode plate 1. The tightening belt buckle holes 2 are relatively arranged on both sides of the fabric edging 5, and the tightening belt buckle holes 2 are used to match and associate with the portable medical first aid equipment. The power interface 3 is arranged on the other side of the fabric edging 5. The power cord 4 is connected to the flexible electrode plate 1 through the power interface 3 to provide defibrillation current.

[0043] Combine Figure 2 、 Figure 3 As shown, the flexible electrode plate 1 includes a conductive layer 11 and a base layer 12. The conductive layer 11 includes conductive yarn 101, which is mainly composed of a continuous floating yarn structure, supplemented by hydrophilic modified yarn 102 with a modified original structure for consolidation. The two yarns are interwoven in warp and weft to form the conductive layer 11. The conductive yarn 101 floats above the hydrophilic modified yarn 102 and appears wavy on the surface of the conductive layer. The hydrophilic modified yarn 102 is used to absorb liquid conductive media before use. The base layer 12 includes hydrophobic yarn 103 interwoven in warp and weft. The hydrophobic yarn 103 of the base layer 12 and the hydrophilic modified yarn 102 of the conductive layer 11 are connected to form a three-dimensional fabric structure. When in use, one side of the conductive layer 11 is attached to the skin.

[0044] In this embodiment, electrode impedance is an important indicator for measuring whether the electrode can be used for defibrillation. The conductive layer 11 is the main structure for conducting the electrode current. The lower the impedance of the conductive layer 11, the greater the current carrying capacity and the less energy loss. Therefore, the design and weaving of the flexible fabric electrode in this application mainly focus on improving the impedance of the conductive layer 11 itself. On the one hand, the wavy conductive layer surface makes the flexible fabric electrode contact with the skin more closely, and the touch is softer. It avoids problems such as loose contact between the fabric electrode and the skin, sudden changes in contact area, and unstable contact under different movement postures. Therefore, the floating thread structure and wavy shape greatly increase the contact area between the conductive layer surface and the skin, reducing the contact impedance with the skin. On the other hand, because the hydrophilic modified yarn 102 has good moisture absorption and water retention properties, the conductive medium it absorbs is not easy to evaporate and dry, and can remain in the flexible electrode plate 1 for a long time, meeting the requirements of long-term wear of portable medical devices. Based on the sufficient infiltration of the liquid conductive medium, the overall impedance of the fabric flexible electrode plate 1 is further reduced, and the impedance of the contact area with the skin is also improved to a certain extent.

[0045] Furthermore, the warp yarns of the conductive layer 11 are composed of conductive yarns 101 and hydrophilic modified yarns 102I, which are arranged alternately. The weft yarns of the conductive layer 11 are all composed of hydrophilic modified yarns 102II. The conductive yarns 101 are interwoven with the predetermined hydrophilic modified yarns 104, which serve as the weft yarns, to form a continuous floating yarn structure. The hydrophobic yarns 103, which serve as the warp yarns, and the hydrophilic modified yarns 102II, which serve as the weft yarns, are interwoven to form a connecting structure. The conductive yarns 101 are connected in parallel in sequence, with one end of the power cord 4 connected to any conductive yarn 101 and the other end connected to an AC power source. The structure design of the base layer 12 corresponds to the structure style of the conductive layer 11, and only needs to meet the requirements of connecting the conductive layer 11 and being tightly interwoven.

[0046] In this embodiment, compared to other fabric structures, the float weave has fewer warp and weft yarns interwoven per unit area, resulting in a looser yarn arrangement and a softer, smoother fabric. Furthermore, a greater average float length in the fabric increases the contact area between the fabric and the skin, creating a closer fit and lowering the contact impedance with the skin. Therefore, the flexible electrode plate 1 designed in this embodiment can achieve a defibrillation effect.

[0047] In terms of raw material selection, conductive yarn 101 includes stainless steel filaments or yarns, pure silver filaments or yarns, and filaments or yarns plated with gold, silver, copper, nickel, aluminum, or zinc. Hydrophilic-modified yarn 102 includes hydrophilic yarns modified with polyacrylates, starch-acrylate polymers, starch-acrylonitrile graft copolymers, and acrylamide-acrylonitrile-acrylic acid terpolymers. Hydrophobic yarn 103 includes polyester yarn, nylon yarn, bamboo fiber yarn, and spandex yarn.

[0048] In this embodiment, the conductive layer 11 utilizes biocompatible conductive yarn 101 and hydrophilic modified yarn 102 as its warp and weft yarns. This ensures a sufficient defibrillation contact area while reducing the inherent impedance of the conductive layer 11 and enhancing its hygroscopicity and skin-smoothing feel. The base layer 12, primarily composed of hydrophobic yarn, enhances perspiration and breathability while also providing a three-dimensional coverage of the base layer 12 over the conductive layer 11, further improving the skin-fitting effect of the conductive layer 11.

[0049] Another embodiment provides a method for preparing the above-mentioned flexible defibrillator electrode based on a three-dimensional fabric structure. In combination with the characteristics of the flexible electrode plate in terms of raw material selection, organization design, preparation process and working mode, the weaving equipment used in this embodiment includes but is not limited to small sample looms and other woven fabric weaving equipment with the function of importing and storing machine drawings and equipped with two or more weaving shafts. The process of weaving the flexible electrode plate mainly includes: raw material selection and preparation of warp and weft yarns, warping and threading according to the designed organization machine drawing, weaving (opening, weft insertion, weft beating, curling and warp feeding in sequence), looping processing, and width setting finishing. On the basis of the above-mentioned fabric weaving and shaping, it is cut into appropriate sizes to obtain a flexible electrode plate. The above-mentioned flexible electrode plate is subjected to fabric edge wrapping, tightening belt buckle hole punching, power cable arrangement, and interface installation to obtain a flexible defibrillator electrode based on a three-dimensional fabric structure.

[0050] Optionally, in this embodiment, a Y208W semi-automatic sample loom is selected as the weaving equipment, and a weaving beam is added to configure it in a double weaving beam mode. The weaving width is 15 cm, the warp density is 787 strands / 10 cm, and the weft density is 787 strands / 10 cm.

[0051] like Figure 4 As shown, the preparation method specifically comprises the following steps:

[0052] Step 1: Preparation of hydrophilic modified yarn.

[0053] Step 11: Prepare sodium polyacrylate (PAAS), N,N-dimethylformamide (DMF), thermoplastic polyurethane (TPU), 9.7tex cotton grey yarn and 4.9tex cotton grey yarn.

[0054] Step 12: 35% by mass of TPU and 65% by mass of DMF were mixed and placed in a heated magnetic stirrer and stirred at 60° C. for 2 h to obtain a TPU-DMF mixed solution.

[0055] Step 13: Add 55% PAAS by mass to a 65% TPU-DMF mixed solution, set the temperature to room temperature (25°C), and stir for 4 hours; then place the mixed solution in an ultrasonic disperser, set the ultrasonic temperature to room temperature, the ultrasonic time to 1 hour, and the ultrasonic power to 90% to obtain a PAAS-TPU-DMF dispersed solution.

[0056] Step 14: The 9.7 tex cotton yarn and the 4.9 tex cotton yarn were immersed in the PAAS-TPU-DMF dispersion solution respectively for 30 minutes; the impregnated yarns were placed in a tension drawing device and dried in an oven at a set temperature of 200°C for 10 minutes. The dried yarns were hydrophilic modified yarns.

[0057] In this embodiment, the yarn obtained by modifying the 4.9 tex cotton natural yarn is referred to as the hydrophilic modified yarn A, and the yarn obtained by modifying the 9.7 tex cotton natural yarn is referred to as the hydrophilic modified yarn B.

[0058] Step 2: Select 316 stainless steel filament yarn with a diameter of 0.1 mm and hydrophilic modified yarn A as the warp yarn of the conductive layer, and select hydrophilic modified yarn B as the weft yarn of the conductive layer; select 40D spandex yarn as the warp yarn of the base layer, and 70D polyester yarn as the weft yarn of the base layer.

[0059] Step 3: If Figure 5 As shown in the figure, the conductive layer structure (a) is designed to be a conductive yarn with a continuous floating yarn structure as the main component, supplemented by a hydrophilic modified yarn with a changed original structure for consolidation. The weaving machine diagram of the flexible electrode plate is drawn in combination with the base layer structure (b) and the connecting structure of the conductive layer and the base layer (c). Figure 6 As shown, the weaving machine diagram includes the organization diagram (a), the reed drawing diagram (b), the heddle drawing diagram (c) and the pattern plate diagram (d).

[0060] exist Figure 6 In (a), the numbers from left to right represent the warp yarn numbers, and the numbers from bottom to top represent the weft yarn numbers, where "1, 2, 3..." represent the hydrophilic modified yarns of the conductive layer, "①, ②, ③..." represent the stainless steel conductive yarns of the conductive layer, and "Ⅰ, Ⅱ, Ⅲ..." represent the yarns of the base layer. The yarns numbered in the horizontal sequence are spandex yarns (warp yarns), and the yarns numbered in the vertical sequence are polyester yarns (weft yarns). In the organization diagram, ■、 The three symbols are all warp weave point marks, indicating that the warp yarn is above the weft yarn; □ is the weft weave point, indicating that the weft yarn is above the warp yarn; the square design where the conductive layer weft yarn and the base layer warp yarn intersect is the connecting weave, with Indicates: grid filling where the conductive layer warp yarns and the base layer weft yarns intersect It means that the warp yarns of the conductive layer are lifted when the weft yarns of the base layer are woven in, and do not participate in the interweaving of the base layer. Figure 6 (b) shows the reeding pattern of this embodiment, where continuous ■ indicates that the corresponding warp yarns pass through the same reed dent. Figure 6 (c) shows the drawing-in rule of this embodiment, "1, 2, 3...16" represent the heald frame numbers of the weaving equipment, and ■ indicates that the corresponding warp yarn passes through the target heald frame. Figure 6 (d) The pattern card diagram of the weaving equipment is the basis for setting the weaving program.

[0061] Step 4: Warp the conductive layer warp yarn to the weaving shaft A, and warp the base layer warp yarn to the weaving shaft B. According to the reed drawing diagram (b) and the reed drawing diagram (c), the warp yarns of the conductive layer and the base layer are sequentially inserted into the healds of the corresponding heald frames, and then the warp yarns inserted into the healds are inserted into the reed teeth according to the rule of 8 insertions per reed; set the heald lifting order on the sample loom according to the heald lifting rule shown in the pattern card diagram (d); perform opening, weft insertion, weft beating, curling, and warp feeding movements in sequence to interweave the warp and weft yarns of each layer to form the conductive layer and the base layer, and connect the spandex yarn of the base layer with the hydrophilic modified yarn B of the conductive layer to form a flexible electrode plate as a whole. The structure of the flexible electrode plate is a three-dimensional fabric structure formed by the upper and lower layers, as shown in FIG. Figure 2 shown.

[0062] Step 5: Stretch the flexible electrode plate.

[0063] The flexible electrode plate is covered on the ring-pulling drum, so that the surface of the conductive layer is in full contact with the ring-pulling drum, and the end of the hydrophilic modified yarn A as the warp is tightened, and the tension at the end of the stainless steel filament yarn is kept loose. The ring-pulling drum is rotated to make the stainless steel filament yarn and the needle on the ring-pulling drum move relative to each other. The stainless steel filament yarn will be gradually pulled out from the surface of the conductive layer, forming a wavy structure floating above the hydrophilic modified yarn A on the surface of the conductive layer. The effect after the ring-pulling treatment is as follows: Figure 3 shown.

[0064] Step 6: The flexible electrode plate after the ring stretching treatment is fixed by a pin plate stenter, the temperature is set to 60 ° C, and the fixing time is 30 minutes.

[0065] Step 7: Cut the flexible electrode plate into pieces of 120 mm x 120 mm in size and chamfer the right-angled edges with a chamfer radius of 10 mm.

[0066] Step 8: Use polyester-cotton blended plain weave fabric to wrap the cut flexible electrode plate so that the fabric wrapping is interwoven with the edge of the flexible electrode plate. The wrapping width is 10mm. The wrapping effect is as follows: Figure 1 shown.

[0067] Step 9: Complete the parallel wiring at both ends of the stainless steel filament yarn, assemble the power interface and power cord on one side of the fabric edge, connect the power cord to any stainless steel filament yarn through the power interface, and open holes on both sides of the fabric edge as tightening belt buckle holes to complete the overall assembly of the flexible defibrillation electrode.

[0068] Step 10: Place the assembled flexible defibrillation electrode in a liquid conductive medium to fully soak it. After soaking for 30 minutes, take it out and wear it on a human body impedance model.

[0069] The fabric flexible electrode plate prepared in this embodiment needs to be used in conjunction with a liquid conductive medium, such as physiological saline, conductive hydrosol, etc. The flexible fabric electrode needs to be soaked in physiological saline or conductive hydrosol to a certain extent before being worn, and the hydrophilic modified yarn of the conductive layer has good moisture absorption and water retention properties, and can fully absorb high conductive media such as physiological saline or conductive hydrosol. At the same time, the hydrophilic modified yarn and the conductive yarn are closely spaced, and the conductive medium of the hydrophilic modified yarn will also wet the conductive yarn. After testing, the flexible defibrillation electrode prepared in this embodiment has an effective defibrillation area of ​​50 to 70 cm 2 The AC impedance at 10 Hz is no more than 3 kΩ, and the AC impedance at 30 Hz is no more than 10 kΩ, which meets the electrical performance requirements of defibrillation electrodes.

[0070] The above description is only a preferred embodiment of the present application, and the present invention is not limited to the above embodiment. It is understood that other improvements and variations directly derived or imagined by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included in the scope of protection of the present invention.

Claims

1. A flexible defibrillation electrode based on a three-dimensional fabric structure, characterized in that: It includes a flexible electrode plate, a tightening belt buckle hole, a power interface and a power cord, wherein the tightening belt buckle holes are arranged on both sides of the flexible electrode plate relative to each other, and the power cord is connected to the flexible electrode plate through the power interface to provide defibrillation current; The flexible electrode plate includes a conductive layer and a base layer. The conductive layer includes conductive yarns mainly composed of continuous floating yarns, supplemented by hydrophilic modified yarns with modified original tissues for consolidation. The two yarns are interwoven in warp and weft to form the conductive layer, and the conductive yarns float above the hydrophilic modified yarns and are wavy on the surface of the conductive layer. The hydrophilic modified yarns are used to absorb liquid conductive media before use. The base layer includes hydrophobic yarns interwoven in warp and weft. The hydrophobic yarns of the base layer and the hydrophilic modified yarns of the conductive layer are connected to form a three-dimensional fabric structure. When in use, one side of the conductive layer is attached to the skin. For the conductive layer, the warp yarns are the conductive yarns and the hydrophilic modified yarns, and the two are arranged alternately, and all the weft yarns are the hydrophilic modified yarns; the conductive yarns and the predetermined hydrophilic modified yarns as the weft yarns are interwoven to form a continuous floating line structure; the hydrophobic yarns as the warp yarns and the hydrophilic modified yarns as the weft yarns are interwoven to form a connecting structure; the conductive yarns are connected in parallel in sequence, one end of the power cord is connected to any conductive yarn, and the other end is connected to an AC power supply.

2. The flexible defibrillation electrode based on a three-dimensional fabric structure according to claim 1, characterized in that: The conductive yarn includes stainless steel filaments or yarns, pure silver filaments or yarns, and filaments or yarns with a coating metal of gold, silver, copper, nickel, aluminum, or zinc; the hydrophilic modified yarn includes hydrophilic yarn modified with polyacrylate, starch-acrylate polymer, starch-acrylonitrile graft copolymer, or acrylamide-acrylonitrile-acrylic acid terpolymer resin; and the hydrophobic yarn includes polyester yarn, nylon yarn, bamboo fiber yarn, and spandex yarn.

3. The flexible defibrillation electrode based on a three-dimensional fabric structure according to claim 1, characterized in that: The flexible defibrillator electrode also includes a fabric edging, which is interwoven with the edge of the flexible electrode plate to stabilize the flexible electrode plate; the tightening belt buckle holes are relatively arranged on both sides of the fabric edging, and the power interface is arranged on the remaining side edges of the fabric edging.

4. A method for preparing a flexible defibrillation electrode based on a three-dimensional fabric structure, characterized in that: The preparation method comprises: Conductive yarn and hydrophilic modified yarn are selected as the warp yarn of the conductive layer, and hydrophilic modified yarn is selected as the weft yarn of the conductive layer; hydrophobic yarn is selected as the warp and weft yarn of the base layer; The conductive layer structure is designed to be the conductive yarn mainly composed of continuous floating yarn structure, supplemented by the hydrophilic modified yarn of the changed original structure for consolidation, and the weaving machine diagram of the flexible electrode plate is drawn in combination with the base layer structure and the connecting structure of the conductive layer and the base layer. The weaving machine diagram includes the structure diagram, reed diagram, harness drawing diagram and pattern plate diagram; The warp yarns of the conductive layer and the base layer are sequentially inserted into the healds of the corresponding heald frames according to the reed drawing diagram and the heald drawing diagram, and the warp yarns inserted into the healds are then inserted into the reed teeth according to a predetermined reed insertion rule; the heald raising order is set on the loom according to the heald raising rule indicated by the pattern card diagram; shedding, weft insertion, beating-up, curling, and warp let-off are performed in sequence to interweave the warp and weft yarns of each layer to form the conductive layer and the base layer, and the hydrophobic yarn of the base layer is connected to the hydrophilic modified yarn of the conductive layer to form a flexible electrode plate as a whole, and the structure of the flexible electrode plate is a three-dimensional fabric structure formed by upper and lower layers; Performing a looping process on the flexible electrode plate so that the conductive yarn of the conductive layer floats above the hydrophilic modified yarn and forms a wavy shape on the surface of the conductive layer; Assemble a power interface and a power cord, wherein the power cord is connected to the flexible electrode plate through the power interface to provide defibrillation current; open holes on both sides of the flexible electrode plate as tightening belt buckle holes to obtain flexible defibrillation electrodes; The assembled flexible defibrillation electrode is placed in a liquid conductive medium, which is absorbed by the hydrophilic modified yarn and wets the adjacent conductive yarn.

5. The method for preparing a flexible defibrillation electrode based on a three-dimensional fabric structure according to claim 4, characterized in that: In the tissue diagram, the squares where the weft yarns of the conductive layer and the warp yarns of the base layer intersect are designed as the connecting tissue; the squares where the warp yarns of the conductive layer and the weft yarns of the base layer intersect represent that the warp yarns of the conductive layer are lifted when the weft yarns of the base layer are woven in, so that they do not participate in the interweaving of the base layer.

6. The method for preparing a flexible defibrillation electrode based on a three-dimensional fabric structure according to claim 4, characterized in that: The step of performing a ring-drawing process on the flexible electrode plate includes: Cover the flexible electrode plate on the ring-pulling roller so that the surface of the conductive layer contacts the ring-pulling roller; tighten the end of the hydrophilic modified yarn serving as the warp yarn and keep the tension at the end of the conductive yarn relaxed; rotate the ring-pulling roller so that the conductive yarn and the needle on the ring-pulling roller move relative to each other, and pull the conductive yarn out from the surface of the conductive layer.

7. The method for preparing a flexible defibrillation electrode based on a three-dimensional fabric structure according to claim 5, characterized in that: The preparation method further comprises: The flexible electrode plate after the ring stretching treatment is fixed and arranged by a pin-plate stenter; The flexible electrode plate is cut into pieces according to a predetermined size, and the edges are chamfered.

8. The method for preparing a flexible defibrillation electrode based on a three-dimensional fabric structure according to claim 7, characterized in that: The preparation method further comprises: Performing fabric wrapping on the cut flexible electrode plate, so that the fabric wrapping is interwoven with the edge of the flexible electrode plate to stabilize the flexible electrode plate; Holes are opened on both sides of the fabric edging as buckle holes for tightening straps, and the power interface is assembled on the remaining sides of the fabric edging.

9. The method for preparing a flexible defibrillation electrode based on a three-dimensional fabric structure according to any one of claims 4 to 8, characterized in that: The preparation method further comprises: preparing sodium polyacrylate, N,N-dimethylformamide, thermoplastic polyurethane and cotton grey yarn; Mixing and stirring thermoplastic polyurethane and N,N-dimethylformamide in predetermined mass fractions to obtain a mixed solution; adding a predetermined mass fraction of sodium polyacrylate to a predetermined mass fraction of a mixed solution, stirring and dispersing the mixture in sequence to obtain a dispersed solution; The cotton natural yarn is immersed in the dispersed solution, the immersed yarn is placed in a tension drawing device and then placed in an oven for drying to obtain the hydrophilic modified yarn.

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