Disposable electroencephalogram sensor for electroencephalogram monitoring
The disposable EEG sensor addresses interference and detachment issues by using a hook ring with a through hole for gel distribution and skin pricking needles, improving signal quality and reliability in noisy surgical settings.
Patent Information
- Application Number
- CN202420356835.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-27
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-02-27
AI Technical Summary
Existing EEG sensors face challenges in maintaining reliable signal acquisition in complex anesthesia environments due to interference from electrosurgical equipment and issues with conductive gel distribution, leading to inaccurate anesthesia monitoring and potential sensor detachment.
A disposable EEG sensor design featuring a substrate with electrodes, foam, and a hook ring with a through hole for conductive gel distribution, along with pricking needles for skin contact, ensuring complete gel coverage and stable attachment.
Ensures effective conductive gel distribution and stable sensor attachment, enhancing EEG signal quality and reliability in noisy surgical environments.
Smart Images
Figure CN222130161U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of electroencephalogram sensors, in particular to a disposable electroencephalogram sensor for electroencephalogram monitoring. Background Art
[0002] Anesthesia is a reversible functional inhibition of the central and / or peripheral nervous systems produced by drugs or other methods. The main characteristic of this inhibition is the loss of sensation, especially pain. Anesthesia is the use of drugs or other methods to temporarily cause the patient to lose sensation as a whole or in part in order to achieve painless surgical treatment.
[0003] General anesthesia is the most widely used method of anesthesia in clinical practice. With the combined use of new strong and short-acting general anesthetics, it has become difficult to judge the depth of general anesthesia. The potential danger of intraoperative awareness always exists. Therefore, convenient and effective monitoring of the anesthesia depth of patients under general anesthesia and corresponding guidance on the use of perioperative general anesthetics have been a hot topic for anesthesia workers in recent years.
[0004] Among them, EEG can better monitor the functional state and changes of the cerebral cortex, and is considered to be the most sensitive and accurate objective indicator for evaluating the state of consciousness at this stage. Since the EEG signal is relatively weak at the uV level, it is easily interfered with, especially in the anesthesia surgery environment. The use of electrosurgical equipment such as high-frequency electric knives, monitoring equipment, heating blankets, etc. will cause interference and affect the EEG signal acquisition. Therefore, the reliability of sensors used to collect EEG in complex anesthesia surgery environments is very critical. Traditional sensors are mostly single-chip or linear designs. During use, the patient's position change or pulling will cause the sensor to fall off, thereby affecting EEG monitoring and causing inaccurate anesthesia monitoring.
[0005] In the process of collecting EEG signals, in order to obtain high-quality EEG signals, conductive gel is usually applied between the skin and the electrodes to reduce impedance and improve signal quality during collection. The conductive gel enhances the electrical activity connection between the electrodes and the skin and prevents environmental noise from contaminating the EEG signals.
[0006] U.S. Patent No. US006434410B1 discloses an EEG collector, which is provided with a column and a support platform on the electrode, and a foam in contact with the skin is provided on the support platform. When the installation is completed and conductive gel needs to be dripped, the conductive gel is dripped on the foam, and the conductive gel sinks and contacts the electrode by its own gravity. However, due to the blocking effect of the support platform, the conductive gel is difficult to sink to the filling dead angle between the support platform and the electrode, thereby affecting the conduction effect of the conductive gel and the collection quality of the EEG signal. In addition, since the contact area of the electrode, the column and the support platform is small and they are immersed in the gel for a long time, it is easy for the support platform or the column + the support platform to fall off from the electrode sheet and become unusable. Utility Model Content
[0007] The utility model aims to overcome the defects in the prior art and provide a disposable electroencephalogram sensor for electroencephalogram monitoring which has a simple structure and good conduction effect.
[0008] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a disposable EEG sensor for EEG monitoring, including a substrate and a circuit printed on the substrate, and the circuit is provided with a plurality of electrodes for signal collection, characterized in that foam is pasted on the substrate, and collection holes corresponding to the plurality of electrodes are formed on the foam; a hook ring and a support are installed in the collection hole, a conductive gel that is conductive to the electrodes is dripped in the support, and a through hole is formed in the middle of the hook ring to facilitate the sinking of the conductive gel.
[0009] As a preferred solution of the utility model, the hook ring is a hollow circular ring structure, the hook ring and the support ring are snap-fitted into the collection hole, and the collection hole is a non-circular hole that is convenient for snapping the hook ring and the support ring.
[0010] As a preferred solution of the utility model, a plurality of pricking needles for piercing the stratum corneum of the skin are formed on the surface of the hook ring.
[0011] As a preferred solution of the utility model, a plurality of needle arrays are distributed on the hook ring, and a plurality of needles are arranged in parallel.
[0012] As a preferred solution of the utility model, the bottom of the hook ring abuts against the surface of the electrode, and the electrode and a plurality of needles are formed on opposite sides of the hook ring.
[0013] As a preferred solution of the utility model, the support member is a planar structure, and a plurality of needle holes matching with a plurality of needles are formed on the support member, and the support member is plugged into the hook ring through the needle holes.
[0014] As a preferred solution of the utility model, the needle hole is plugged into the needle or the needle hole is connected to the through hole.
[0015] As a preferred solution of the utility model, the end of the needle passes through the needle hole to form an exposed structure.
[0016] As a preferred solution of the utility model, an adhesion layer which adheres to the substrate is formed on the surface of the foam.
[0017] As a preferred solution of the utility model, a card base connected to the circuit is provided at the end of the substrate.
[0018] Compared with the prior art, the beneficial effect of the utility model is that by providing a hook ring with a through hole, a cavity for filling with conductive gel is formed between the middle part of the hook ring and the support member, and the conductive gel in the cavity can be directly connected to the electrode, and there is no dead corner for filling the conductive gel between the electrode and the support member, ensuring that the conductive gel can be filled on the electrode, thereby ensuring the conduction effect of the conductive gel and the quality of collecting EEG signals. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is an exploded view of the utility model;
[0020] Figure 2 It is a structural schematic diagram of the utility model;
[0021] Figure 3 It is a schematic diagram of the structure of the support;
[0022] Figure 4 It is a schematic diagram of the structure of the hook ring;
[0023] Figure numerals: substrate 1, circuit 2, electrode 3, foam 4, collection hole 41, hook ring 5, needle 51, through hole 52, support member 6, needle hole 61, card base 7. DETAILED DESCRIPTION
[0024] The embodiments of the utility model are described in detail below with reference to the accompanying drawings.
[0025] like Figure 1-Figure 4 As shown, a disposable EEG sensor for EEG monitoring includes a substrate 1 and a circuit 2 printed on the substrate 1, and a plurality of electrodes 3 for signal collection are provided on the circuit 2, the substrate 1 is pasted with foam 4, and collection holes 41 corresponding to the plurality of electrodes 3 are formed on the foam 4; a hook ring 5 and a support member 6 are installed in the collection hole 41, a conductive gel that is conductive to the electrodes 3 is dripped in the support member 6, and a through hole 52 is formed in the middle of the hook ring 5 to facilitate the sinking of the conductive gel.
[0026] The circuit 2 is a silver paste circuit printed on the substrate 1, and branch lines corresponding to the electrodes 3 are formed on the circuit 2. The number of electrodes 3 is set according to actual needs, and the branch lines are set independently of each other.
[0027] The substrate 1 is a flexible circuit board, so when the EEG sensor is attached to the human head, the substrate 1 can be bent according to the different sizes of the patient's head, thereby achieving stable fitting of the EEG sensor on the human head.
[0028] The hook ring 5 is a hollow circular ring structure. The hook ring 5 and the support ring 6 are snap-fitted into the collection hole 41. The collection hole 41 is a non-circular hole that is convenient for the hook ring 5 and the support ring to be snap-fitted. The foam 4 is made of a flexible material, so that the size of the collection hole 41 formed by the foam 4 has a certain amount of deformation. The hook ring 5 and the support ring 6 can be interference fit into the corresponding collection hole 41, thereby achieving stable installation of the hook ring 5 and the support ring 6 in the foam 4.
[0029] A through hole 52 is formed in the middle of the hook ring 5, and the support member 6 and the electrode 3 are located on opposite sides of the opening of the through hole 52, so that after the conductive gel is dripped on the support member 6, the conductive gel can sink into the hook ring 5 under the action of gravity and connect with the electrode 3 to realize electrical signal transmission. At the same time, under the action of the hollow structure of the hook ring 5, there is no dead angle for the sinking of the conductive gel, ensuring that the conductive gel is filled.
[0030] The surface of the hook ring 5 is provided with a plurality of needles 51 for piercing the stratum corneum of the skin. The plurality of needles 51 are distributed in an array on the hook ring 5 and are arranged in parallel. The needles 51 are used to pierce the stratum corneum of the skin, thereby facilitating the conductive gel to receive electrical signals from the brain.
[0031] The bottom of the hook ring 5 abuts against the surface of the electrode 3, and the electrode 3 and a plurality of needles 51 are formed on opposite sides of the hook ring 5. One side of the hook ring 5 is a smooth structure, which is convenient for abutting against the surface of the electrode 3, and the other side of the hook ring 5 is formed with needles 51, which is convenient for piercing the stratum corneum of the skin.
[0032] The support member 6 is a planar structure, and a plurality of needle holes 61 adapted to the plurality of needles 51 are formed on the support member 6. The support member 6 is plugged into the hook ring 5 through the needle holes 61. The support member 6 forms a honeycomb structure, and a plurality of needle holes 61 are arranged in an array on the support member 6, and the arrangement of the needle holes 61 corresponds to the arrangement of the needles 51, ensuring that the plurality of needles 51 are plugged into the plurality of needle holes 61 at the same time, thereby realizing the plugging of the support member 6 on the hook ring 5.
[0033] The pinhole 61 is plugged into the needle 51 or the pinhole 61 is connected to the through hole 52. The pinhole 61 on the outer circle of the support member 6 is used to cooperate with the needle 51, and the pinhole 61 in the middle of the support member 6 is used to be connected to the through hole 52. The pinhole 61 in the middle of the support member 6 is used for the conductive gel to pass through, and the conductive gel filling amount in the hook ring 5 can also be observed through the pinhole 61 in the middle of the support member 6 to ensure that the conductive gel is full.
[0034] The end of the needle 51 passes through the needle hole 61 to form an exposed structure, so that it is convenient for the end of the needle 51 to pierce the stratum corneum of the skin. At the same time, the exposed size of the needle 51 is limited by the needle hole 61 and the length of the needle 51, ensuring that the exposed size of the needle 51 will not cause damage to the human skin while piercing the stratum corneum of the skin.
[0035] An adhesive layer is formed on the surface of the foam 4 and adhered to the substrate 1. The adhesive layer can be a double-sided adhesive. Under the action of the adhesive layer, the foam 4 is fixedly connected to the surface of the substrate 1, and the hook 5 and the support member 6 are simultaneously stably set on the substrate 1.
[0036] A card base 7 connected to the circuit 2 is provided at the end of the substrate 1 .
[0037] In actual use, the circuit 2 is printed on the substrate 1, and the electrode 3 is connected to the printed circuit 2, and then the foam 4 is adhered to the substrate 1, so that the collection hole 41 of the foam 4 corresponds to the position of the electrode 3, the hook 5 and the support 6 are installed in the foam 4, and the conductive gel is dripped on the support 6.
[0038] At this time, the conductive gel sinks into the through hole 52 under the action of gravity and is connected to the electrode 3 . The filling condition of the conductive gel can be observed through the pinhole 61 .
[0039] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
[0040] Although the following terms are used more frequently in this paper: substrate 1, circuit 2, electrode 3, foam 4, collection hole 41, hook 5, needle 51, through hole 52, support 6, needle hole 61, card base 7, etc., the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.
Claims
1. A disposable electroencephalogram (EEG) sensor for electroencephalogram (EEG) monitoring, comprising a substrate (1) and a circuit (2) printed on the substrate (1), wherein the circuit (2) is provided with a plurality of electrodes (3) for signal collection, wherein: The substrate (1) is adhered with a foam (4), and the foam (4) is formed with collection holes (41) arranged one-to-one corresponding to the plurality of electrodes (3); a hook ring (5) and a support member (6) are installed in the collection hole (41), a conductive gel that is conductive to the electrodes (3) is dripped into the support member (6), and a through hole (52) is formed in the middle of the hook ring (5) to facilitate the sinking of the conductive gel.
2. A disposable EEG sensor for EEG monitoring according to claim 1, characterized in that: The hook ring (5) is a hollow circular ring structure, and the hook ring (5) and the support ring are arranged in a snap-fitting manner in the collection hole (41). The collection hole (41) is a non-circular hole that facilitates the snap-fitting of the hook ring (5) and the support ring.
3. A disposable EEG sensor for EEG monitoring according to claim 2, characterized in that: A plurality of puncture needles (51) for puncturing the stratum corneum of the skin are formed on the surface of the hook ring (5).
4. A disposable EEG sensor for EEG monitoring according to claim 3, characterized in that: A plurality of needles (51) are distributed in an array on the hook ring (5), and the plurality of needles (51) are arranged in parallel.
5. A disposable EEG sensor for EEG monitoring according to claim 3, characterized in that: The bottom of the hook ring (5) abuts against the surface of the electrode (3), and the electrode (3) and a plurality of needles (51) are formed on opposite sides of the hook ring (5).
6. A disposable EEG sensor for EEG monitoring according to claim 3, characterized in that: The support member (6) is a planar structure, and a plurality of needle holes (61) adapted to the plurality of needles (51) are formed on the support member (6). The support member (6) is plugged into the hook ring (5) through the needle holes (61).
7. A disposable EEG sensor for EEG monitoring according to claim 6, characterized in that: The needle hole (61) is plugged into the puncture needle (51) or the needle hole (61) is connected to the through hole (52).
8. A disposable EEG sensor for EEG monitoring according to claim 6, characterized in that: The end of the needle (51) passes through the needle hole (61) to form an exposed structure.
9. A disposable EEG sensor for EEG monitoring according to claim 1, characterized in that: An adhesion layer that adheres to the substrate (1) is formed on the surface of the foam (4).
10. A disposable EEG sensor for EEG monitoring according to claim 1, characterized in that: The end of the substrate (1) is provided with a card base (7) which is connected to the circuit (2).