Disposable electrocardio electrode patch and electrocardio recorder

Abstract

The utility model relates to a disposable electrocardio electrode patch which comprises a body and an extension portion, the extension portion is connected with the side face of the body and extends in the direction away from the body, a first electrode and a second electrode are arranged on the body, a third electrode is arranged on the extension portion, and the distance range L between the first electrode and the third electrode meets the condition that L is larger than or equal to 80 mm and smaller than or equal to 130 mm. Due to the design of the extending parts, the distance range L between the two farthest electrodes is increased compared with a traditional disposable electrocardio electrode patch, the receiving area of heart signals is enlarged, the effective data volume of an electrocardiogram is increased, the electrocardiogram voltage height, especially the P wave voltage height, of an electrocardio recorder is effectively increased, and the electrocardiogram recording efficiency is improved. Therefore, doctors are helped to diagnose heart-related diseases more accurately, and the problems that wearing comfort is poor, wearing is inconvenient and wearing time is insufficient due to the fact that the size of the electrocardio recorder is increased are solved.

Description

Technical Field

[0001] The utility model relates to the field of electrocardiogram electrodes, in particular to a disposable electrocardiogram electrode patch and an electrocardiogram recorder. Background Art

[0002] An electrocardiogram (ECG) recorder is a medical device used to monitor ECG signals for long or short periods of time. Single-channel Holter recorders can be attached directly to the skin and collect weak electrical signals generated by the heart to help doctors diagnose heart disease, monitor heart health, or evaluate treatment effectiveness. Currently, single-channel Holter recorders on the market typically use one of the limb leads I, II, or III, presenting a single electrocardiogram (ECG) that is used to interpret heart health. The P wave, an atrial depolarization wave, represents the excitation of the left and right atria and is one of the most important parameters in an ECG. Changes in the P wave on an ECG can provide important clues for the differential diagnosis of sinus rhythm and ectopic rhythm, and are particularly valuable for the diagnosis of arrhythmias.

[0003] To ensure flexibility and long-term wearability, single-channel Holter recorders are typically designed to be smaller overall. Consequently, the size of the disposable ECG electrode patches used with them is also smaller, typically not exceeding the left chest area. However, this smaller size also presents some issues, particularly a less pronounced P-wave voltage. When patients sweat or engage in limb movement, the ECG voltage may be lower, reducing the effective ECG time period. When diagnosing these lower-voltage ECGs, doctors cannot clearly see the P-wave voltage height and width, making it difficult to determine whether a patient has an arrhythmia. Currently, the most effective way to alter the P-wave voltage is to increase the electrode spacing of a single-channel Holter recorder. However, increasing the electrode spacing also increases the size of the single-channel Holter recorder, significantly impacting the patient's wearing experience and daily life.

[0004] Therefore, it is necessary to design a disposable ECG electrode patch that can enhance the P wave voltage height of the single-channel Holter recorder without changing the overall situation of the single-channel Holter recorder, so that the improved disposable ECG electrode patch can be used in conjunction with the single-channel Holter recorder. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the problem that the P wave voltage height in the existing electrocardiogram is not obvious without changing the overall situation of the existing single-channel dynamic electrocardiogram recorder, thereby providing a disposable electrocardiogram electrode patch and an electrocardiogram recorder.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A disposable ECG electrode patch comprises a main body and an extension portion, wherein the extension portion is connected to a side surface of the main body and extends in a direction away from the main body;

[0008] The main body is provided with a first electrode and a second electrode for transmitting signals with the electrocardiograph recorder, and the first electrode is arranged at an end of the main body away from the extension portion; the extension portion is provided with a third electrode electrically connected to the main body and used for transmitting signals with the electrocardiograph recorder, and the spacing range L between the first electrode and the third electrode meets the condition: 80≤L≤130mm.

[0009] Furthermore, the extension portion also includes a printed electrode line, one end of which is electrically connected to the body, and the other end is connected to the third electrode, for extending the distance between the first electrode and the third electrode and enabling electrical signal transmission between the third electrode and the body.

[0010] Furthermore, the printed electrode line includes an upper insulating layer, an intermediate conductive layer, a lower insulating layer, and a lower contact, wherein the intermediate conductive layer is sandwiched between the upper insulating layer and the lower insulating layer, and the lower contact corresponds to the position of the third electrode and is located below the lower insulating layer;

[0011] One end of the middle conductive layer close to the body is exposed from the upper insulating layer and is electrically connected to the body;

[0012] A through hole is provided on one side of the lower insulating layer close to the third electrode to expose the other side of the middle conductive layer so as to electrically connect it to the lower contact, and the lower contact is electrically connected to the third electrode.

[0013] Furthermore, the upper insulating layer is an insulating ink layer, the middle conductive layer is a printed silver layer, the lower insulating layer is a PET substrate layer, and the lower contact is printed silver chloride.

[0014] Furthermore, the body further includes a conductive portion for transmitting the electrical signal received by the third electrode, wherein the conductive portion is provided at one end of the body away from the extension portion and is connected to the third electrode through the printed electrode line;

[0015] The upper surface of the printed electrode line close to the conductive part is bonded to the conductive part, and the lower surface of the printed electrode line close to the conductive part is bonded to the body through a double-sided tape.

[0016] Furthermore, a distance range L between the first electrode and the third electrode satisfies the condition: 120≤L≤130 mm.

[0017] Furthermore, the body further comprises a first release film, an instrument side tape layer, a second release film A, a first waterproof film A, a human body side tape layer, a second waterproof film and a third release film A which are sequentially arranged and connected from top to bottom;

[0018] There are two second waterproof membranes, and the two second waterproof membranes are connected to the lower surfaces of the first electrode and the second electrode respectively;

[0019] The first release film is detachably bonded to the upper surface of the instrument-side tape layer, and the third release film A is detachably bonded to the lower surface of the human-side tape layer;

[0020] The extension portion further includes a second release film B, a first waterproof film B and a third release film B;

[0021] The second release film A and the second release film B are an integrated structure, the first waterproof film A and the first waterproof film B are an integrated structure, and the third release film A and the third release film B are an integrated structure.

[0022] Furthermore, the instrument side tape layer and the first waterproof membrane A are respectively provided with a first through hole, a second through hole and a third through hole, and the human body side tape layer is respectively provided with the first through hole and the second through hole;

[0023] The first through hole is used to provide a placement space for the first electrode so that the first electrode transmits signals to the electrocardiograph, the second through hole is used to provide a placement space for the second electrode so that the second electrode transmits signals to the electrocardiograph, and the third through hole is used to enable the third electrode to transmit signals to the electrocardiograph.

[0024] Furthermore, the first electrode and the second electrode are both two layers, including an upper electrode and a lower electrode, and the upper electrodes fill the first through hole and the second through hole respectively to transmit signals to the electrocardiograph;

[0025] The area of the lower electrode is larger than that of the upper electrode.

[0026] In order to achieve the above purpose, the present invention also adopts the following technical solutions:

[0027] An electrocardiogram recorder is used in conjunction with the disposable electrocardiogram electrode patch as described above, comprising a host, wherein the host is bonded to the body and receives signals.

[0028] In summary, compared with the prior art, the present invention has at least the following advantages: The disposable ECG electrode patch of the present invention includes a main body and an extension portion, the extension portion being connected to the side of the main body and extending away from the main body, forming an integrated structure. The main body is provided with a first electrode and a second electrode, and the extension portion is provided with a third electrode. The spacing range L between the first electrode and the third electrode satisfies the condition: 80 ≤ L ≤ 130 mm. The first and second electrodes transmit signals to an ECG recorder, and the electrical signal from the third electrode is electrically connected to the main body through the extension portion, thereby transmitting the signal to the ECG recorder. The design of the extension portion increases the spacing range L between the first and third electrodes compared to conventional disposable ECG electrode patches, expanding the reception area for cardiac signals, increasing the amount of effective ECG data, and effectively enhancing the ECG voltage height, particularly the P wave voltage height, of the ECG recorder, thereby helping doctors more accurately diagnose heart-related diseases. At the same time, since the P wave voltage height can be increased without changing the overall size of the ECG recorder, the problems of poor wearing comfort, inconvenience in wearing and insufficient wearing time caused by the increase in the size of the ECG recorder are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 This is an exploded schematic diagram of a disposable ECG electrode patch provided in one embodiment of the present invention.

[0031] Figure 2 This is an exploded schematic diagram of a printed electrode line provided in one embodiment of the present invention.

[0032] Figure 3 This is a schematic structural diagram of a disposable ECG electrode patch provided in one embodiment of the present invention.

[0033] Figure 4 This is a structural diagram of an electrocardiogram recorder.

[0034] Figure 5 This is an ECG diagram shown during a test of the disposable ECG electrode patch before improvement.

[0035] Figure 6This is an ECG diagram showing the improved disposable ECG electrode patch test.

[0036] Description of reference numerals:

[0037] 1. Main body; 11. First electrode; 12. Second electrode; 121. Upper electrode; 122. Lower electrode; 13. Conductive portion; 14. Double-sided tape; 151. First release film; 152. Instrument-side tape layer; 1521. First through-hole; 1522. Second through-hole; 1523. Third through-hole; 153. Second release film A; 154. First waterproof film A; 155. Body-side tape layer; 156. Second waterproof film; 157. Third release film A;

[0038] 2. Extension portion; 21. Third electrode; 22. Printed electrode line; 221. Upper insulating layer; 222. Middle conductive layer; 223. Lower insulating layer; 2231. Through hole; 224. Lower contact; 23. Second release film B; 24. First waterproof film B; 25. Third release film B; 26. Third waterproof film;

[0039] 3. Host; 31. First contact; 32. Second contact; 33. Third contact. DETAILED DESCRIPTION

[0040] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0041] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0043] As attached Figure 1 As shown, the embodiment of the present utility model discloses a disposable ECG electrode patch, comprising:

[0044] The device comprises a main body 1 and an extension 2, which is connected to the side of the main body 1 and extends away from the main body 1. The main body 1 is provided with a first electrode 11 and a second electrode 12 for transmitting signals to an electrocardiogram recorder. The first electrode 11 is located at the end of the main body 1 away from the extension 2. The extension 2 is provided with a third electrode 21, which is electrically connected to the main body 1 and is used to transmit signals to the electrocardiogram recorder. The spacing L between the first electrode 11 and the third electrode 21 satisfies the condition: 80 ≤ L ≤ 130 mm.

[0045] Specifically, the first electrode 11, the second electrode 12, and the third electrode 21 are all used to monitor human health information. The first electrode 11 and the second electrode 12 transmit signals received by contact with human skin to an electrocardiogram recorder. The electrical signal of the third electrode 21 is electrically connected to the main body 1 via the extension portion 2, thereby transmitting the signal to the electrocardiogram recorder. The signal received by the third electrode 21 in contact with human skin is transmitted to the main body 1 via the extension portion 2, and then transmitted to the electrocardiogram recorder through the main body 1 to complete the electrical signal acquisition. Preferably, the first electrode 11, the second electrode 12, and the third electrode 21 are made of a conductive hydrogel material.

[0046] Taking into account the convenience of wearing, patients need to wear it flexibly and for a long time, so the size of the ECG recorder is generally designed to be relatively small, that is, it will not exceed the left chest area. Otherwise, wearing it for a long time will affect the patient's daily activities such as bending over or lying on the side, causing the patient to have difficulty in moving. In addition, if the size of the ECG recorder is too large, it is easy to rub against the patient's clothing, causing the ECG recorder to shift or be damaged, affecting the accuracy and stability of the monitoring data. Therefore, it is necessary to optimize the structure of the disposable ECG electrode patch to match the use of small ECG recorders. The disposable ECG electrode patch designed by this utility model is suitable for ECG recorders with a size of less than or equal to 65mm. As shown in the attached Figure 3As shown, the design of the extension 2 increases the spacing range L (80-130 mm) between the first electrode 11 and the third electrode 21 compared to traditional disposable ECG electrode patches. This larger monitoring range L expands the area receiving cardiac signals, effectively enhancing the ECG voltage height of the ECG recorder, particularly the P-wave voltage height, thereby helping doctors more accurately diagnose heart-related diseases. Furthermore, by maintaining the overall size of the ECG recorder, this solves the problems of poor wearing comfort, inconvenience, and insufficient wearing time caused by the increased size of the ECG recorder. It is worth noting that the minimum boundary value of the spacing range L is set at 80mm because the disposable ECG electrode patch designed in this utility model is suitable for ECG recorders with a size of less than or equal to 65mm. When the distance between the first electrode and the third electrode is extended too small, that is, the distance is less than 80mm, the overall ECG voltage and P wave voltage height are still not obvious, and a significant improvement effect cannot be achieved. Therefore, the minimum spacing value is set to 80mm; the maximum boundary value of the spacing range L is set to 130mm because the distance between the first electrode and the third electrode is extended too large, that is, the distance is greater than 130mm. After the patient wears it, it will exceed the heart monitoring range, resulting in a significant reduction in the amount of effective ECG data. Therefore, the maximum spacing value is set to 130mm.

[0047] To more effectively collect electrical signals, the spacing between the first electrode 11 and the third electrode 21 is further narrowed to improve detection accuracy. The spacing L between the first electrode 11 and the third electrode 21 is set to meet the following conditions: 120 ≤ L ≤ 130 mm. Most preferably, a spacing of 130 mm is selected, as this provides the most distinct overall voltage height and P-wave voltage height of the ECG recorded by the electrocardiogram recorder.

[0048] As attached Figure 2 As shown, the extension portion 2 also includes a printed electrode line 22, one end of the printed electrode line 22 is electrically connected to the main body 1, and the other end is connected to the third electrode 21, for extending the distance between the first electrode 11 and the third electrode 21. At the same time, the printed electrode line 22 is equivalent to a "bridge" for transmitting electrical signals. The electrical signal received by the third electrode 21 when in contact with human skin is transmitted to the main body 1 through the printed electrode line 22, ensuring stable electrical signal transmission between the third electrode 21 and the main body 1.

[0049] More specifically, the printed electrode line 22 includes an upper insulating layer 221, an intermediate conductive layer 222, a lower insulating layer 223, and a lower contact 224. The intermediate conductive layer 222 is sandwiched between the upper insulating layer 221 and the lower insulating layer 223. The lower contact 224 corresponds to the position of the third electrode 21 and is located below the lower insulating layer 223. The function of the upper insulating layer 221 and the lower insulating layer 223 is to prevent the intermediate conductive layer 222 from being interfered with by external factors when transmitting the electrical signal received from the third electrode 21, thereby ensuring the stability and accuracy of the electrical signal transmission. The end of the intermediate conductive layer 222 close to the body 1 is exposed from the upper insulating layer 221 and is electrically connected to the body 1. A through hole 2231 is provided on the side of the lower insulating layer 223 close to the third electrode 21 to expose the other side of the intermediate conductive layer 222 so that it is electrically connected to the lower contact 224, and the lower contact 224 is electrically connected to the third electrode 21. The transmission path of the electrical signal received by the third electrode 21 in contact with human skin is: transmitted from the third electrode 21 to the lower contact 224 connected to it, then transmitted from the lower contact 224 to the intermediate conductive layer 222, and then transmitted from the intermediate conductive layer 222 to the main body 1, completing the transmission of the electrical signal.

[0050] Preferably, the upper insulating layer 221 is an insulating ink layer that can provide good insulation. The middle conductive layer 222 is a printed silver layer. The silver layer has high conductivity and better electron migration ability. Therefore, the use of a printed silver layer can effectively improve the transmission rate and stability of the electrical signal transmitted by the printed electrode line 22. The lower insulating layer 223 is a PET substrate layer, which not only provides good insulation effect, but also provides certain structural support. The lower contact 224 is printed silver chloride. Silver chloride can accurately transmit electrical signals without adverse stimulation to the human body. It is a common electrical signal collection contact point on the market.

[0051] The main body 1 also includes a conductive portion 13 for transmitting the electrical signal received by the third electrode 21. The conductive portion 13 is provided at the end of the main body 1 away from the extension portion 2 and is connected to the third electrode 21 via a printed electrode line 22. The upper surface of the printed electrode line 22 on the side close to the conductive portion 13 is bonded to the conductive portion 13, and the lower surface of the printed electrode line 22 on the side close to the conductive portion 13 is bonded to the main body 1 via double-sided tape 14. When the electrical signal received by the third electrode 21 in contact with human skin is finally transmitted to the main body 1 by the intermediate conductive layer 222, it is specifically transmitted to the conductive portion 13 provided on the main body 1. The surface conductivity of the conductive portion 13 is stable and can accurately and efficiently transmit electrical signals to the electrocardiograph. Specifically, the conductive portion is generally made of a material with strong adhesiveness and a resistance value of 2Ω.

[0052] The body 1 also includes a first release film 151, an instrument-side tape layer 152, a second release film A 153, a first waterproof film A 154, a body-side tape layer 155, a second waterproof film 156, and a third release film A 157, arranged sequentially from top to bottom. The instrument-side tape layer 152 secures the disposable ECG electrode patch to the ECG recorder for coordinated use. The body-side tape layer 155 adheres the connected ECG recorder and disposable ECG electrode patch to the skin. The body-side tape layer 155 extends toward the extension portion and is connected to the third waterproof film 26. The third waterproof film 26 is detachably bonded to the printed electrode wires 22 to protect them when not in use. The first release film 151 and the third release film A 157 respectively protect the instrument-side tape layer 152 and the body-side tape layer 155 from external contamination when the disposable ECG electrode patch is not in use, ensuring the adhesiveness of the tapes during actual use. Two second waterproof films 156 are provided, each connected to the lower surfaces of the first electrode 11 and the second electrode 12. When worn by a patient, these two films prevent the bottom electrodes from coming into direct contact with the patient's skin and protect the first and second electrodes 11, 12 from being soaked by the patient's sweat. The first release film 151 is detachably bonded to the upper surface of the instrument-side tape layer 152, and the third release film A 157 is detachably bonded to the lower surface of the human-side tape layer 155. When a disposable ECG electrode patch is needed, the first release film 151 is first separated from the upper surface of the instrument-side tape layer 152 so that the disposable ECG electrode patch is fixedly attached to the ECG recorder. Then, the third release film A 157 is separated from the lower surface of the human-side tape layer 155 so that the disposable ECG electrode patch is fixed to the human skin surface together with the ECG recorder.

[0053] The extension 2 also includes a second release film B23, a first waterproof film B24, and a third release film B25, all of which protect the printed electrode lines 22 from external influences. The second release film A153 and the second release film B23 are integrally formed, the first waterproof film A154 and the first waterproof film B24 are integrally formed, and the third release film A157 and the third release film B25 are integrally formed.

[0054] The instrument-side tape layer 152 and the first waterproof membrane A 154 are each provided with a first through-hole 1521, a second through-hole 1522, and a third through-hole 1523. The body-side tape layer 155 is also provided with a first through-hole 1521 and a second through-hole 1522. The first through-hole 1521 provides space for the first electrode 11 to transmit signals to the electrocardiograph. The second through-hole 1522 provides space for the second electrode 12 to transmit signals to the electrocardiograph. The third through-hole 1523 provides space for the conductive portion 13 to transmit electrical signals from the third electrode 21 received by the conductive portion 13 to the electrocardiograph.

[0055] Furthermore, since the stacked layers of body 1 have a certain thickness, to better enable first electrode 11 and second electrode 12 to contact the electrocardiogram recorder, first electrode 11 and second electrode 12 are each configured as two layers, including an upper electrode 121 and a lower electrode 122. Upper electrode 121 fills first through-hole 1521 and second through-hole 1522, respectively, to transmit signals to the electrocardiogram recorder. Specifically, lower electrode 122 has a larger surface area than upper electrode 121. The large surface area of lower electrode 122 facilitates expanding the area for receiving human electrical signals, preventing poor contact between first electrode 11 and second electrode 12 and human skin, which could lead to detection errors.

[0056] As attached Figure 4 As shown, an embodiment of the present invention also provides an electrocardiogram recorder for use with the disposable electrocardiogram electrode patch of the above embodiment, comprising a main unit 3, which is bonded to the main unit 1 via an instrument-side adhesive tape layer 152 and receives signals. The main unit 3 comprises a first contact 31, a second contact 32, and a third contact 33. The position of the first contact 31 corresponds to the position of the first electrode 11 on the disposable electrocardiogram electrode patch and receives electrical signals from the first electrode 11. The position of the second contact 32 corresponds to the position of the second electrode 12 on the disposable electrocardiogram electrode patch and receives electrical signals from the first electrode 12. The position of the third contact 31 corresponds to the position of the conductive portion 13 on the disposable electrocardiogram electrode patch and receives electrical signals from the third electrode 21 via the conductive portion 13.

[0057] Example 1

[0058] We performed different types of data statistics on the same patient and collected 2 hours of data. The results are as follows:

[0059] (1) As attached Figure 5 As shown, when the distance between the first electrode 11 and the third electrode 21 in the disposable ECG electrode patch is not improved, it is worn on the upper left chest area. The average voltage of about 5000 P waves detected in the human body is only 0.043mv, and the average voltage of about 7000 QRS waves is only 0.937mv.

[0060] (2) As attached Figure 6 As shown, when the distance between the first electrode 11 and the third electrode 21 in the disposable ECG electrode patch is the optimal value of 130 mm and it is worn in the upper left chest area, the average voltage of about 5000 P waves detected in the human body rises to 0.066 mv, an increase of 53.49%, and the average voltage of about 7000 QRS waves rises to 1.719 mv, an increase of 83.4%.

[0061] From the above measurement results, it can be seen that increasing the distance between the first electrode 11 and the third electrode 21 in the disposable ECG electrode patch significantly enhances the overall ECG voltage height and the P-wave voltage height, thereby increasing the amount of effective ECG data without changing the size of the ECG record, while avoiding the problems of poor wearing comfort, inconvenience in wearing and insufficient wearing time.

[0062] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A disposable ECG electrode patch, characterized in that: The device comprises a main body and an extension portion, wherein the extension portion is connected to a side surface of the main body and extends in a direction away from the main body; The main body is provided with a first electrode and a second electrode for transmitting signals with the electrocardiograph recorder, and the first electrode is arranged at an end of the main body away from the extension portion; the extension portion is provided with a third electrode electrically connected to the main body and used for transmitting signals with the electrocardiograph recorder, and the spacing range L between the first electrode and the third electrode meets the condition: 80≤L≤130mm.

2. The disposable ECG electrode patch according to claim 1, characterized in that: The extension portion further includes a printed electrode line, one end of which is electrically connected to the body, and the other end is connected to the third electrode, for extending the distance between the first electrode and the third electrode and enabling electrical signal transmission between the third electrode and the body.

3. The disposable ECG electrode patch according to claim 2, characterized in that: The printed electrode line includes an upper insulating layer, an intermediate conductive layer, a lower insulating layer, and a lower contact, wherein the intermediate conductive layer is sandwiched between the upper insulating layer and the lower insulating layer, and the lower contact corresponds to the position of the third electrode and is located below the lower insulating layer; One end of the middle conductive layer close to the body is exposed from the upper insulating layer and is electrically connected to the body; A through hole is provided on one side of the lower insulating layer close to the third electrode to expose the other side of the middle conductive layer so as to electrically connect it to the lower contact, and the lower contact is electrically connected to the third electrode.

4. The disposable ECG electrode patch according to claim 3, wherein: The upper insulating layer is an insulating ink layer, the middle conductive layer is a printed silver layer, the lower insulating layer is a PET substrate layer, and the lower contact is printed silver chloride.

5. The disposable ECG electrode patch according to claim 2, characterized in that: The body further includes a conductive portion for transmitting the electrical signal received by the third electrode, wherein the conductive portion is provided at one end of the body away from the extension portion and is connected to the third electrode through the printed electrode line; The upper surface of the printed electrode line close to the conductive part is bonded to the conductive part, and the lower surface of the printed electrode line close to the conductive part is bonded to the body through a double-sided tape.

6. The disposable ECG electrode patch according to claim 1, wherein: The distance L between the first electrode and the third electrode satisfies the condition: 120≤L≤130 mm.

7. The disposable ECG electrode patch according to claim 1, wherein: The body also includes a first release film, an instrument side tape layer, a second release film A, a first waterproof film A, a human body side tape layer, a second waterproof film and a third release film A which are sequentially arranged from top to bottom; There are two second waterproof membranes, and the two second waterproof membranes are connected to the lower surfaces of the first electrode and the second electrode respectively; The first release film is detachably bonded to the upper surface of the instrument-side tape layer, and the third release film A is detachably bonded to the lower surface of the human-side tape layer; The extension portion further includes a second release film B, a first waterproof film B and a third release film B; The second release film A and the second release film B are an integrated structure, the first waterproof film A and the first waterproof film B are an integrated structure, and the third release film A and the third release film B are an integrated structure.

8. The disposable ECG electrode patch according to claim 7, characterized in that: The instrument side tape layer and the first waterproof membrane A are respectively provided with a first through hole, a second through hole and a third through hole, and the human body side tape layer is respectively provided with the first through hole and the second through hole; The first through hole is used to provide a placement space for the first electrode so that the first electrode transmits signals to the electrocardiograph, the second through hole is used to provide a placement space for the second electrode so that the second electrode transmits signals to the electrocardiograph, and the third through hole is used to enable the third electrode to transmit signals to the electrocardiograph.

9. The disposable ECG electrode patch according to claim 8, characterized in that: The first electrode and the second electrode are both two layers, including an upper electrode and a lower electrode, and the upper electrodes fill the first through hole and the second through hole respectively to transmit signals to the electrocardiograph; The area of the lower electrode is larger than that of the upper electrode.

10. An electrocardiogram recorder for use with the disposable electrocardiogram electrode patch according to any one of claims 1 to 9, characterized in that: It includes a host, which is bonded to the body and receives signals.

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