Electroencephalographic monitoring sensor with intradermal needle
By introducing an intradermal needle into the EEG monitoring sensor, which is inserted subcutaneously and electrically connected to the electrode pad, the problem of poor sensor adhesion is solved, stable monitoring data acquisition is achieved, and replacement costs are reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUZHOU SCI&TECH TOWN HOSPITAL
- Filing Date
- 2025-01-10
- Publication Date
- 2026-06-26
AI Technical Summary
Existing EEG monitoring sensors often suffer from poor adhesion when attached to a patient's forehead, leading to unstable or unmonitored data and increasing usage costs.
The device employs an EEG monitoring sensor with an intradermal needle. The intradermal needle is inserted subcutaneously and electrically connected to the electrode pads to directly acquire EEG biological signals, avoiding problems with poor adhesion.
This effectively solves the problem of poor sensor-skin contact, ensuring the stability and reliability of monitoring data and reducing the frequency of sensor replacement.
Smart Images
Figure CN224403667U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electroencephalogram (EEG) monitoring technology, specifically relating to an EEG monitoring sensor with an intradermal needle. Background Technology
[0002] In anesthesia surgery, especially general anesthesia surgery, it is necessary to monitor the depth of anesthesia in real time in order to avoid problems such as over-anesthesia and under-anesthesia. As an important indicator that reflects the depth of anesthesia, the electroencephalogram (EEG) signal can be obtained by the EEG monitoring sensor of the surgical patient. The patient's anesthesia depth index can be calculated by software. Since monitoring is required throughout the operation, it is necessary for the EEG monitoring sensor to maintain a stable monitoring state.
[0003] EEG monitoring sensors are typically attached to the patient's forehead using an adhesive method. However, in practical applications, we've found a common problem with EEG monitoring sensors from several manufacturers: poor adhesion. Our investigation revealed that although there is an adhesive layer on the sensor, it sometimes fails to ensure sufficient contact with the skin. Even using additional tape for fixation is not very effective. In severe cases, nearly one-third of some batches of products fail to generate monitoring data or produce unstable data. Each disposable EEG monitoring sensor costs two to three hundred yuan, and replacing sensors due to data loss has negative consequences for patients, medical staff, and hospitals.
[0004] Chinese patent CN219814142U, entitled "An Anti-detachment EEG Monitoring Sensor," discloses an anti-detachment EEG monitoring sensor, including a circuit assembly, a first adhesive component disposed on the circuit assembly, and a second adhesive component fixed to the first adhesive component. The second adhesive component has a storage slot, and a conductive component is fixed to the first adhesive component, passing through and protruding from the storage slot. Both the first and second adhesive components are adhered to the human skin, with the first adhesive component wrapping around the second adhesive component during adhesion. The first and second adhesive components provide dual fixation for the sensor; even if the outer edge of the first adhesive component peels off, the inner second adhesive component ensures a firm fixation, keeping the conductive component in constant contact with the skin. This solution effectively reduces the problem of poor adhesion of the EEG monitoring sensor, but it is relatively complex, undoubtedly increasing the cost of using the EEG monitoring sensor. Utility Model Content
[0005] The purpose of this invention is to provide a solution to the problem of poor adhesion when an electroencephalogram (EEG) monitoring sensor is attached to a patient's forehead.
[0006] To solve the above-mentioned technical problems, this utility model discloses an EEG monitoring sensor with an intradermal needle, including an EEG monitoring sensor body with multiple electrode pads, one or more of the electrode pads having an intradermal needle, the intradermal needle being fixed to the middle of the inner or outer side of the electrode pad, and the intradermal needle being electrically connected to the electrode pad; when the EEG monitoring sensor body is attached to the patient's forehead, the intradermal needle is inserted subcutaneously.
[0007] Preferably, the depth of the intradermal needle insertion is no more than 1.5 mm.
[0008] Preferably, the intradermal needle is a press needle.
[0009] Preferably, the press needle includes a conductive needle base and a needle tip, as well as a needle mounting component pad for embedding and fixing the needle base, the needle base and the needle tip are connected, and the needle tip protrudes from the outer side of the needle mounting component pad.
[0010] Preferably, when the intradermal needle is fixed to the outer side of the electrode sheet, the needle tip is electrically connected to the electrode sheet through the pad of the needle mounting component.
[0011] Preferably, the needle mounting pad is bonded to the electrode plate with conductive adhesive, and the needle mounting pad is made of conductive material.
[0012] Preferably, the area of the pad of the needle assembly is smaller than that of the electrode sheet.
[0013] Preferably, when the intradermal needle is fixed to the inner side of the electrode sheet, a conductive sheet is laid on the outer side of the electrode sheet, the needle tip passes through the electrode sheet and the conductive sheet, and is electrically connected to the electrode sheet through the conductive sheet.
[0014] Preferably, the area of the conductive sheet is smaller than that of the electrode sheet.
[0015] The present invention relates to an EEG monitoring sensor with an intradermal needle, which can be inserted into the skin through the needle tip to obtain EEG biological signals more directly. It can better avoid the problem of poor adhesion when the EEG monitoring sensor is attached to the patient's forehead, and has certain application prospects. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of an electroencephalogram (EEG) monitoring sensor with an intradermal needle.
[0017] Figure 2 This is a schematic diagram of another type of EEG monitoring sensor with an intradermal needle.
[0018] The components in the diagram are labeled as follows: 1. Electrode sensor body; 2. Intradermal needle; 3. Needle base; 4. Needle tip; 5. Needle mounting pad; 6. Conductive sheet. Detailed Implementation
[0019] The present invention will be further described in detail below through embodiments, so that those skilled in the art can implement it based on the description.
[0020] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.
[0021] Example 1
[0022] like Figure 1 As shown, an EEG monitoring sensor with an intradermal needle 3 includes an EEG monitoring sensor body 1 with multiple electrode pads 2. One or more of the electrode pads 2 have an intradermal needle 3 (in actual testing, we only used press needles with stainless steel needle hubs and tips; in principle, any conductive intradermal needle capable of penetrating the skin is acceptable). The intradermal needle 3 is fixed to the middle of the inner or outer side of the electrode pad 2, and the intradermal needle 3 is electrically connected to the electrode pad 2. When the EEG monitoring sensor body 1 is attached to the patient's forehead, the intradermal needle 3 penetrates the skin, thereby transmitting the EEG biological signals more directly to the electrode pad 2.
[0023] The depth of the intradermal needle 3 should not exceed 1.5mm. Since most people have thin forehead skin and we do not need to stimulate acupoints, a smaller press needle is sufficient. For example, during testing, we used a pediatric press needle with a depth of 1.3mm, which can basically achieve non-invasive monitoring.
[0024] The intradermal needle 3 is a press needle, including a conductive needle base 4 and a needle tip 5, as well as a needle mounting part pad 6 for embedding and fixing the needle base 4. The needle base 4 and the needle tip 5 are connected, and the needle tip 5 protrudes from the outer side of the needle mounting part pad 6.
[0025] When the intradermal needle 3 is fixed to the outer side of the electrode plate 2, the needle tip 5 is electrically connected to the electrode plate 2 through the needle mounting part pad 6.
[0026] The needle mounting component pad 6 is bonded and fixed to the electrode plate 2 with conductive adhesive, and the needle mounting component pad 6 is made of conductive material.
[0027] During testing, we collected five EEG monitoring sensors that exhibited abnormal monitoring data (no monitoring data or unstable data) during use. Additionally, we used a standard pediatric press needle (1.3mm insertion depth). The size of the needle mounting pad was trimmed to be smaller than electrode pad 2 (ensuring the portion of the electrode pad not covered by the pad could still contact the skin). Furthermore, the fabric layer on one side of the press needle mounting pad was damaged to expose the needle hub for electrical connection to the electrode pad. (In this embodiment, a standard press needle was used; since the fabric material of the standard press needle mounting pad is non-conductive, this...) The fabric layer on one side of the press needle is damaged to expose the needle hub for electrical connection with the electrode plate. (Using conductive material for the needle mounting pad will improve the effect.) To enhance the stability of the electrical connection, an aluminum foil layer can be placed between the needle hub and the electrode plate (equivalent to using conductive material for the needle mounting pad) to increase the contact area between the needle hub 4 and the electrode plate 2, thus strengthening the stability of the electrical connection. Then, the press needle is glued and fixed to the electrode plate 2 (due to limitations, only ordinary glue is used for bonding; using conductive glue would likely be more effective). At this point, the needle hub is fixed between the needle mounting pad and the electrode plate. The fabricated EEG monitoring sensor with the intradermal needle is fixed to the forehead of the volunteer, and the intradermal needle 3 is inserted subcutaneously. EEG monitoring tests are performed again, and it is found that the monitoring data of 4 EEG monitoring sensors have returned to normal (one of which only stopped abnormal after the needle hub was fixed a second time).
[0028] It is evident that combining the intradermal needle 3 with the EEG monitoring sensor to more directly acquire EEG biosignals can effectively avoid the problem of poor adhesion when the EEG monitoring sensor is attached to the patient's forehead. This is a viable and effective solution with promising application prospects.
[0029] Example 2
[0030] like Figure 2 As shown, similar to Embodiment 1, the difference lies in that the area of the needle mounting pad 6 is smaller than that of the electrode pad 2. When the intradermal needle 3 is fixed to the inner side of the electrode pad 2, a conductive sheet 7 is laid on the outer side of the electrode pad 2 via the needle tip 5. The needle tip 5 passes through the electrode pad 2 and the conductive sheet 7, and is electrically connected to the electrode pad 2 through the conductive sheet 7 to enhance the conductivity between the needle tip and the electrode pad. The area of the conductive sheet 7 is smaller than that of the electrode pad 2. The conductive sheet 7 can be made of conductive materials such as aluminum foil. This arrangement of the intradermal needle can better reduce the impact on the contact between the electrode pad and the skin. However, since the needle tip needs to pass through the electrode pad, it may damage the electrode pad. Therefore, the electrode pad needs to be pre-treated by drilling holes.
[0031] Although the embodiments of this utility model have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for this utility model. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, this utility model is not limited to the specific details and embodiments shown and described herein.
Claims
1. An electroencephalogram (EEG) monitoring sensor with an intradermal needle, characterized in that: The device includes an EEG monitoring sensor body with multiple electrode pads. One or more of the electrode pads have intradermal needles, which are fixed to the middle of the inner or outer side of the electrode pads and are electrically connected to the electrode pads. When the EEG monitoring sensor body is attached to the patient's forehead, the intradermal needles are inserted subcutaneously. The intradermal needle is a press needle; The press needle includes a conductive needle base and a needle tip, as well as a needle mounting component pad for embedding and fixing the needle base. The needle base and the needle tip are connected, and the needle tip protrudes from the outer side of the needle mounting component pad. The area of the pad in the needle mounting part is smaller than that of the electrode plate.
2. The EEG monitoring sensor with an intradermal needle according to claim 1, characterized in that: The depth of the intradermal needle implantation is no more than 1.5 mm.
3. The EEG monitoring sensor with an intradermal needle according to claim 1, characterized in that: When the intradermal needle is fixed to the outer side of the electrode sheet, the needle tip is electrically connected to the electrode sheet through the pad of the needle mounting part.
4. The EEG monitoring sensor with an intradermal needle according to claim 3, characterized in that: The needle mounting component pad is bonded and fixed to the electrode plate with conductive adhesive, and the needle mounting component pad is made of conductive material.
5. The EEG monitoring sensor with an intradermal needle according to claim 1, characterized in that: When the intradermal needle is fixed to the inner side of the electrode sheet, a conductive sheet is laid on the outer side of the electrode sheet. The needle tip passes through the electrode sheet and the conductive sheet and is electrically connected to the electrode sheet through the conductive sheet.
6. The EEG monitoring sensor with an intradermal needle according to claim 5, characterized in that: The area of the conductive sheet is smaller than that of the electrode sheet.