• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    System for neurostimulation. Neurostimulation system comprising an external control unit (110) capable of transferring energy and instructions to a group of neurostimulators (120, ..., 120') implantable in a tissue (100) that constitute a coordinated communication network. The external unit (110) comprises a microprocessor (112) to which user interface (111), communication interface (113) and power transfer (114) devices are connected. Each neurostimulator (120, ..., 120') comprises antennas (121, ..., 121'), an electronic data processing unit (122, ..., 122'), a communication interface (123, ..., 123'), at least one sensor (124, ..., 124'), a group of electrodes (125, ..., 125') and at least one current source (126, ..., 126'). The current from each current source (126, ..., 126') originating from the neurostimulators (120, ..., 120') is delivered to the tissue (100), to cause activation (or inhibition, depending on the frequency of neuronal (or muscle) stimulation and also transfer information between the elements of the network. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2798182A1
    申请号:ES201930510
    申请日:2019-06-06
    公开日:2020-12-09
    发明作者:Alejandro Barriga-Rivera；Hipólito Guzmán-Miranda
    申请人:Universidad de Sevilla；Universidad Pablo de Olavide；
    IPC主号:
    专利说明:

    [0002] System for neurostimulation
    [0004] OBJECT OF THE INVENTION
    [0006] The present invention is applied in the industry dedicated to medical devices, and, in particular, medical devices to deliver electrical stimulation treatments (electrostimulation) to cells of organs or tissues.
    [0008] More particularly, the present invention relates to a system of neurostimulators implantable in a body for stimulating excitable cells of the body.
    [0010] BACKGROUND OF THE INVENTION
    [0012] Electrical stimulation of the nervous system has been used to treat a wide repertoire of health problems. To date, implantable neurostimulators have been used to treat a number of conditions such as deafness, blindness, and Parkinson's disease. A notable example of the success of these therapies is the cochlear implant, a medical device that can restore hearing by supplying electrical current to the inner ear. Other examples include deep brain stimulation for the treatment of Parkinson's disease, or the bionic eye for the restoration of vision. Typically, these devices are based on an implantable unit in the body that delivers electrical stimuli and a unit external to the body that controls the implant.
    [0014] A complex system of the body is the gastrointestinal tract, composed of a collection of anatomical structures and organs whose main function is the absorption and processing of nutrients. It contains a few hundred million enteric neurons distributed from the mouth to the anus, and it is also innervated by the central nervous system. At present, there are a large number of patients suffering from neurogenic bowel dysfunction (NBD). Neurogenic intestinal dysfunction is a pathology that appears as a consequence of a problem in neurons, for example, caused by a compromise of the central nervous system (spinal cord injuries, amyotrophic lateral sclerosis, Parkinson's, diabetes, stroke, ...). This dysfunction is one of the factors that can cause loss of bowel function. Motility problems, with varying degrees of severity (fecal incontinence or constipation), are also common in patients suffering from NBD. Sacral neuromodulation has shown favorable results in restoring fecal continence in patients with spinal cord injuries. However, in those patients who suffer from neuropathy that affects intrinsic neurons and who do not have effective treatment, colonic neurostimulation is a promising alternative to colectomy or colon resection. The treatment of these and other pathologies would benefit from a coordinated neurostimulation action in different locations of the body in an appropriate and coordinated way. But to date this would require bulky implants and complex surgery. While current technology allows implantation of miniaturized neurostimulators that can collect ultrasound or microwave energy, today these devices cannot establish interactions to deliver coordinated action. For example, distributed neurostimulation could be used to treat different types of pain, blocking nerve conduction, or also to restore mobility of the extremities through the coordinated stimulation of agonist and antagonist muscles. However, these devices do not have the ability to transfer information as a collaborative network.
    [0016] The objective technical problem that arises is therefore to provide a system that allows the interconnection and communication between a group of implantable neurostimulators to achieve a coordinated action in the stimulation of cells (organs and tissues) in different locations of the body, being able in addition to estimating the relative positions of neurostimulators (which is particularly relevant, for example, in the case of treating patients with NBD).
    [0018] DESCRIPTION OF THE INVENTION
    [0020] The present invention serves to solve the aforementioned problem, through the use of multichannel neurostimulators capable of carrying out the coordinated supply of electric current, wirelessly, in different locations of the body and monitoring their relative positions. The present invention provides a system to provide distributed neural stimulation, wherein each element (neurostimulator) uses the body (human or animal) as a channel to communicate, within a range of possible transmission frequencies in a body tissue, with the other neurostimulatory elements, forming a network. Through measurements of the communication channels existing between the neurostimulatory elements, the system allows obtaining estimates of the positions relative values of the elements in the network and thus provide coordinated actions between all neurostimulators.
    [0022] The present invention is of particular relevance for the stimulation of the gastrointestinal tract, where a coordinated activation of different sections of the intestine benefits patients suffering from a wide spectrum of pathologies. However, there is a repertoire of applications for this invention beyond the digestive. For example, this invention has applicability in nerve conduction block for pain management, as well as in the field of functional neurostimulation to restore limb mobility, among other therapeutic uses.
    [0024] The invention proposes a network arrangement of neurostimulatory elements, establishing communication channels between them that use the electrical stimuli themselves that each neurostimulator transfers, through electrodes, to the tissue (or tissue of an organ) in which it is implanted. Each neurostimulator element is intelligent (it has an electronic data processing unit, implemented for example in a microcontroller or an ASIC) and independent (with its own group of electrodes and electrical sources), but acts in a coordinated way with other neurostimulatory elements network, to provide effective therapy for a large number of pathologies.
    [0026] The implantable neurostimulator network can use multiple frequency carriers to characterize communication channels. The characterization of the communication channels is preferably carried out by the electronic processing unit provided in each neurostimulator element, since when done independently by the “intelligence” of the neurostimulator itself, it allows the execution of coordinated actions within the network of neurostimulatory elements itself. The communication channels between any pair of neurostimulatory elements can be characterized by estimating the ability of the physiological medium to propagate different frequencies, delivered as current waveforms through the electrodes. These measurements, when combined with triangulation techniques, can be used to estimate the relative positions of the stimulating elements within the network, that is, the body. The changes in the relative position of a given neurostimulator can be estimated taking into account the variations in the characteristics of the communication channels between the different elements of the network, for example, using orthogonal frequency division multiplexing (OFDM) techniques, due to their acronym in English).
    [0027] One aspect of the invention relates to a system for neurostimulation comprising the following components:
    [0029] - A plurality (ie, a pair or more) of implantable neurostimulators in an excitable tissue, in a range of stimulation frequencies, by means of electrical energy, each neurostimulator comprising a group of electrodes and at least one wireless source of current that transmits, in a range of transmission frequencies, electrical impulses to the tissue through the group of electrodes. Each neurostimulator also comprises an electronic data processing unit configured to: - characterize a communication channel established between each neurostimulator and at least one neighboring neurostimulator to transmit and receive electrical impulses, electrical impulses with which the plurality of neurostimulators communicate in network and in a self-coordinated way (ie, between the network elements themselves) or coordinated by an external system control unit (described below); and
    [0030] - estimating relative positions between each pair of neurostimulators implanted in the tissue using the characterization of the communication channel between each pair of neurostimulators at different frequencies within the range of transmission frequencies.
    [0031] - At least one external control unit comprising:
    [0032] - a microprocessor,
    [0033] - a communication interface device connected to the microprocessor and to a communication interface provided in each neurostimulator, through which an electronic data processing unit of each neurostimulator exchanges data with (the microprocessor of) the external control unit;
    [0034] - an energy transfer device that emits an external electromagnetic field to be captured by an array of antennas provided in each neurostimulator, the communication interface device being connected to the energy transfer device to transfer the exchangeable data in the external electromagnetic field with the microprocessor.
    [0036] The advantages of the present invention compared to the state of the prior art are fundamentally:
    [0037] - The electrodes' own electrical stimulation is used to transport information between neighboring implants, reducing energy consumption and heating the surrounding tissue. Information can be encoded using phase modulation techniques, frequency modulation or amplitude modulation, among others, since the stimulation waveforms can also be arbitrary and, therefore, are not limited to constant current pulses.
    [0038] - In the event of failure of one of the neurostimulatory elements, the system can adapt and continue to offer effective therapy, thus becoming a robust, reliable and fault-tolerant system.
    [0039] - The system allows closed-loop neurostimulation.
    [0040] - Communication between network elements can be coordinated not only by the external unit but also the neurostimulatory elements themselves can self-coordinate with each other. In other words, neurostimulatory implants, using their own stimuli to exchange information, can adapt their stimulation strategy, without the need for intervention from the external unit other than to provide them with sufficient energy. This self-coordination reduces energy expenditure and accelerates the response of the global system.
    [0042] BRIEF DESCRIPTION OF THE FIGURES
    [0044] A series of drawings that help to better understand the invention and that expressly relate to an embodiment of said invention that is presented as a non-limiting example of this, will now be described very briefly.
    [0046] FIGURE 1.- Shows a block diagram of a system for neurostimulation, according to a preferred embodiment of the invention.
    [0048] FIGURE 2.- Shows three examples of electrical stimulation pulses used by the neurostimulators of the system for neurostimulation and communication.
    [0050] FIGURE 3.- Shows a communication scenario between two neurostimulatory elements of the system, according to a possible embodiment of the invention.
    [0052] FIGURE 4.- Shows an example of neurostimulators of the system implanted in the stomach and the change of their relative positions in time due to a peristaltic contraction, according to a possible scenario of use of the invention.
    [0054] FIGURE 5.- Shows a network of neurostimulators of the system delivering different forms according to the location within the colon, according to another possible scenario of use of the invention.
    [0056] FIGURE 6.- Shows an example of application of a group of neurostimulators capable of establishing a wireless network communication within the body as well as with an external unit located next to the body, according to another possible scenario of use of the invention.
    [0058] FIGURE 7.- Shows an example of application of a group of neurostimulators capable of establishing a wireless network communication within the body as well as with a portable external unit, according to another possible scenario of use of the invention.
    [0060] FIGURE 8.- Shows a miniaturized implantable neurostimulator element, according to a possible embodiment of the invention.
    [0062] FIGURE 9.- Shows a miniaturized implantable neurostimulator element, according to another possible embodiment of the invention.
    [0064] FIGURE 10.- Shows a miniaturized implantable neurostimulator element, according to another possible embodiment of the invention.
    [0066] PREFERRED EMBODIMENT OF THE INVENTION
    [0068] Figure 1 shows the architecture of blocks of a neurostimulation system that comprises at least one external control unit (110) capable of transferring energy and instructions to a group of implants, which are elements of electrical stimulation of nerve cells or neurostimulators (120 , ..., 120 '), implantable in a tissue (100) excitable by electrical energy and constituting elements of a network together with the external control unit (110).
    [0070] The external unit (110) comprises:
    [0071] - at least one user interface device (111), for example, a screen;
    [0072] - a communication interface device (113);
    [0073] - a wireless energy transfer device (114); and
    [0074] - a microprocessor (112) to which the aforementioned devices are connected: user interface (111), communication interface (113) and transfer Power (114).
    [0076] Thus, the microprocessor (112) displays information to the user through the user interface device (111), typically a screen, and also provides energy to the neurostimulators (120, ..., 120 ') through the transfer device. of energy (114), generally using a high frequency electromagnetic field, an electromagnetic field that in turn uses the microprocessor (112) to exchange information with the neurostimulators (120, ..., 120 ').
    [0078] Each neurostimulator device (120, ..., 120 ') comprises a set or array / array of antennas (121, ..., 121'), an electronic data processing unit (122, ..., 122 ' ), a communication interface (123, ..., 123 '), a detection or sensing system with at least one sensor (124, ..., 124'), a group of electrodes (125, ..., 125 ') and at least one current source (126, ..., 126'). The current from each current source (126, ..., 126 ') from the neurostimulatory implants (120, ..., 120') is delivered to the excitable tissue (100), to cause activation (or inhibition, depending on the frequency of neuronal (or muscle) stimulation and also transfer information between the elements of the network, ie, between the electronic data processing units (122, ..., 122 ') of the implants. The antenna array (121, ..., 121 ') is used to collect energy from an external electromagnetic field and transfer data to the microprocessor (112) of the external unit (110) using reverse telemetry. And the group of current sources (126, ..., 126 '), connected to the group of electrodes (125, ..., 125'), is used to inject a controlled amount of charge to the tissue (100) through of said group of electrodes (125, ..., 125 ').
    [0080] The electronic data processing unit (122, ..., 122 '), in charge of making decisions, is the' smart 'part of each neurostimulator element (120, ..., 120'), and can be implemented in a microcontroller, a microprocessor, a FPGA (Field-Programmable Gate Array), a Complex Programmable Logic Device (CPLD), a PSoC programmable system , Programmable System-on-Chip), or an Application-Specific Integrated Circuit or ASIC (Application-Specific Integrated Circuit). That is, the electronic data processing unit of the implant can be any digital, analog or mixed signal circuit that implements the 'intelligence' (in the sense of "decision making") of the device.
    [0081] In a possible embodiment, each neurostimulatory implant (120, ..., 120 ') includes at least one sensor (124, ..., 124'), for example, to measure pressure using MEMS technology or Micro-Electro-Systems. Mechanical and to detect the electric field through the group of electrodes (125, ..., 125 '). In other possible embodiments, the detection system can measure other variables, such as glucose levels, hormone levels, electrical signals, impedance, etc.
    [0083] Communications between neurostimulatory implants (120, ..., 120 ') can be performed using the stimulation pulses generated during electrical stimulation. The information can be encoded by modifying the amplitude of the pacing pulses, as in the example in Figure 2, which shows an example of an unmodulated biphasic pacing pulse (201), a biphasic pacing pulse with amplitude modulation (202) and frequency modulation (203).
    [0085] Digital data can also be encoded, for example using the OFDM technique. By using a number of tones to encode the information, it is also possible to characterize the communication channel, not only through signals embedded within the stimulus itself, but also by sending a repertoire of tones outside the range of stimulation frequencies. In turn, these tones can carry additional information useful to deliver distributed coordinated actions.
    [0087] For the characterization of the communication channel, it is preferable to use ranges from a few kHz to 100kHz. However, it is also possible to carry out communications, with other features, in the 100kHz - 100MHz range. Consequently, the frequencies of the data carriers can range from several Hertz, 10Hz - 100Hz, up to 100MHz. However, in the ranges of up to 1kHz, activation of neurons or muscle cells may occur, and around 10kHz, blockage of nerve transmission may appear.
    [0088] Therefore, stimulators can be coordinated both to excite tissue and to block transmission using frequencies close to 10kHz. One application of neurostimulation may be precisely to block the propagation of action potentials. For example, if you want to generate a stimulus in one area, but you do not want it to spread to another neighboring area, the neurostimulators closest to this last area can generate signals that block nerve transmission. This can be very useful in the digestive tract, where a stimulus can cause the propagation of a peristaltic wave in oral and aboral direction at the same time. In this case, the neighboring electrode can stimulate at frequencies that allow the block in the oral direction and thus facilitate the correct propulsion of the fecal bolus. Another possible application is to use stimulators for cases in which the therapy consists of making a coordinated block or unblock of nerve transmission, for example, to treat diseases in which the problem is that neurons are activated when it is not necessary.
    [0090] The information is transmitted by means of a group of electrodes (125, ..., 125 ') as represented in the diagram of Figure 3. A first current source (301) is capable of encoding a binary message (300) Within the waveform of the electrical stimulus used, a second current source (302) generates the waveform of the main stimulus, and at least a first pair of electrodes (303) of a neurostimulatory implant, used to supply electrical current to the excitable tissue (100) also transmits the information in the form of binary messages in said waveform. The information travels (310) in this way through the tissue (100) in an electromagnetic signal that reaches a second pair of distant electrodes (304) belonging to a neighboring implantable neurostimulator, which pass the received electrical signal to a conditioning subsystem signal (305) used to detect the electric field in said second pair of electrodes (304). Through a demodulator (306) the neighboring neurostimulatory implant extracts the binary message (300) from the information transferred from the first neurostimulator implant. In another possible embodiment, a voltage dependent current source can be used to do the modulation.
    [0092] Therefore, the electrodes (125, ..., 125 ') can act both as an electrical stimulation interface with the excitable tissue (100), as well as an interface for transmitting and receiving information from neighboring electrodes.
    [0094] The relative positions of any of these electrode elements (125, ..., 125 ') implanted in a body can be estimated at different levels of precision by characterizing the communication channel between electrodes at different frequencies. This makes it possible to track the movements of the neurostimulatory implants (120, ..., 120 ') caused, for example, by the displacement of the body's organs during the development of their function. Determining the changes in the relative positions of the implants is of particular interest, for example, in the case of the intestine, where peristaltic contractions are required for proper management of luminal content.
    [0095] Figure 4 shows an example of how the relative position changes between neurostimulators (401, 402, 403, 404, 405) implanted in a stomach (400), illustrating two observations of the stomach, in a first instant of time (t1) and in a second instant of time (t2), during which there is a contraction of the stomach wall produced by a peristaltic movement (410). The characteristics for each communication channel (411t1, 412t1, 413t1, 414t1, 411t2, 412t2, 413t2, 414t2) between each pair of stimulators, measured respectively at each instant of time (t1, t2), indicate their changes in relative positions . It should be noted that this system can provide closed loop stimulation by re-feeding the system with recorded movement, where position, speed and orientation can be used to alter the type of stimulus that is delivered without the need for external intervention.
    [0097] In other words, the nature (force, frequency, phase, etc.) of the stimulus used can be modulated locally according to the spatial position of the stimulating element itself and that of other stimulating elements of the network, as shown in the diagram of Figure 5. The network of neurostimulatory elements (501, 502, 503, 504, 505, 506, 507, 508) can deliver, for each pair of elements, different waveforms according to the location (or relative location) within the body, in the case of Figure 5, a section of the colon (500). Self-coordination of the elements in this case is essential to provide functional therapy through coordinated electrical stimulation in a closed circuit. Figure 5 shows two different peristaltic movements and waveforms: during intestinal wall relaxation (511), a first type of stimulus is delivered (521); and during the contraction of the intestinal wall (512), a second different type of stimulus (522) is used to articulate a correct mechanical pattern capable of propelling the bolus in the aboral direction. The contraction / relaxation states of different sections of the organ can be determined by estimating the relative positions of the stimulating elements in the network.
    [0099] Figure 6 illustrates a use scenario where a group of neurostimulatory elements (601, 602, 603, 604, 605, 606), implanted inside the body (600), is powered and controlled by an external unit (607), which supplies energy and instructions to the network and in this example fixed to the body (600), where communications (610) are established between the elements of the network to offer a coordinated stimulation action.
    [0100] In a different embodiment, as illustrated in Figure 7, the system may use a portable external drive (708), for example attached to a strap around the waist. The beams of electromagnetic radiation (710), ie, radio frequency waves, generated by the portable external unit (708) surround the area of the body (700) where neurostimulatory elements (701, 702, 703, 704, 705, 706) are implanted. In a device external to the belt-type body, the antenna (709) used to transmit electromagnetic energy and data provided by the microprocessor of the portable external unit (708) to the neurostimulatory elements (701, 702, 703, 704, 705, 706) is incorporated. ).
    [0102] Implantable neurostimulators, as illustrated in Figure 1, comprise an electronic data processing unit (122, ..., 122 '), preferably implemented in an ASIC that implements the capabilities of microprocessing and memory, and that controls the other subsystems, among them: the group of antennas (121, ..., 121 ') that is used to collect energy, receive information from the external unit, and to report information to the external unit, and the group of electrodes (125 , ..., 125 ') used to stimulate excitable tissue (100) and to communicate with other implants. The ASIC contains, not only the intelligent electronics, but also the communications electronics through the antennas (121, ..., 121 '), the electronics of the current sources (126, ..., 126'), and any other electronics necessary to perform the neurostimulation function through the electrodes (125, ..., 125 '). Furthermore, implantable neurostimulators comprise a substrate, typically made of some polymer such as polydimethylsiloxane or PDMS, and which contains all the neurostimulator subsystems.
    [0104] Figure 8 illustrates a possible embodiment of a neurostimulatory implant (800) implemented in a support substrate (810) with a circular geometry, for example of the clothing button type that allows a simplified and stable surgical implantation and fixation. The neurostimulator (800) comprises an application-specific integrated circuit (801), four electrodes (802), and four antennas (803) interconnected by connecting tracks (804) on the support substrate (810).
    [0106] Figure 9 shows a different embodiment with a similar arrangement but with a different antenna geometry. Again, the shape of the substrate button 910 that supports all elements and provides airtight encapsulation is chosen to ensure surgical stability. This implantable neurostimulator (900) comprises four electrodes (902) and four antennas (903) interconnected to the specific application integrated circuit (901), on the substrate (910) which has four holes (920) for fixing the implantable neurostimulator ( 900) to the body.
    [0107] In another possible embodiment, illustrated in Figure 10, the implantable neurostimulator (1000) consists of three electrodes (1002) and a set of four elongated flat antennas (1003) connected to the application-specific integrated circuit (1001) by means of connection (1004), all arranged on an elongated substrate (1010) that is fixed to the body through suture holes (1020).
    [0109] Different implant geometries can allow for different antenna sizes, which in turn allows energy transfer to be optimized in different frequency bands. It also allows a greater number of electrodes within the same implant or incorporates larger electrodes, thus providing optimized solutions for different implantation sites and specific therapies.
    [0111] The system can use reverse telemetry techniques to exchange information collected by the implants with the external control unit using the radiating elements (antennas).
    [0113] The system described here optionally and additionally can also communicate with a repertoire of sensors implanted within the body to offer a coordinated action. For example, a glucose sensor can report low glucose levels, so that the stimulator acts on the pancreatic innervation to promote insulin secretion.
    权利要求:
    Claims (15)
    [1]
    1. A neurostimulation system comprising:
    - a plurality of neurostimulators (120, ..., 120 '), implantable in an excitable tissue (100) in a range of frequencies of stimulation by electrical energy, each neurostimulator (120, ..., 120') comprising a group of electrodes (125, ..., 125 ') and at least one wireless current source (126, ..., 126') that transmits electrical impulses to the tissue (100) through the group of electrodes (125, .. ., 125 ') in a range of transmission frequencies;
    characterized by what
    Each neurostimulator (120, ..., 120 ') also comprises an electronic data processing unit (122, ..., 122') configured to:
    - characterize a communication channel established between each neurostimulator (120, ..., 120 ') and at least one neighboring neurostimulator to transmit and receive electrical impulses, electrical impulses with which the plurality of neurostimulators (120, ..., 120 ') communicates in a network, the network coordinated by the electronic data processing units (122, ..., 122') of the plurality of neurostimulators (120, ..., 120 ') or by an external unit of control (110); and - estimating relative positions between each pair of neurostimulators (120, ..., 120 ') implanted in the tissue (100) using the characterization of the communication channel between each pair of neurostimulators (120, ..., 120') at different frequencies within the transmission frequency range
    The system also comprises the external control unit (110) which, in turn, comprises:
    - a microprocessor (112),
    - a communication interface device (113) connected to the microprocessor (112) and to a communication interface (123, ..., 123 ') provided in each neurostimulator (120, ..., 120') through which an electronic data processing unit (122, ..., 122 ') of each neurostimulator (120, ..., 120') exchanges data with the microprocessor (112) of the external control unit (110);
    - an energy transfer device (114) that emits an external electromagnetic field to be captured by an array of antennas (121, ..., 121 ') provided in each neurostimulator (120, ..., 120'), being the communication interface device (113) connected to the energy transfer device (114) to transfer the interchangeable data in the external electromagnetic field with the microprocessor (112).
    [2]
    2. The system according to claim 1, characterized in that at the least one current source (126, ..., 126 ') of the electrode array (125, ..., 125') is configured to generating the electrical pulses containing the interchangeable data with the microprocessor (112) to be transmitted to the tissue (100) through the group of electrodes (125, ..., 125 ').
    [3]
    The system according to claim 2, characterized in that the neurostimulators (120, ..., 120 ') further comprise a signal conditioning subsystem (305) to receive the electrical impulses transmitted to the tissue (100) by the group of electrodes (125, ..., 125 ') of neighboring neurostimulators.
    [4]
    The system according to any of claims 2-3, characterized in that the electrical impulse containing the data is transmitted within the range of stimulation frequencies.
    [5]
    The system according to claim 4, characterized in that the electrical impulse is an unmodulated biphasic stimulation pulse (201), a biphasic amplitude modulation pulse (202) or a frequency modulated stimulation pulse (203).
    [6]
    The system according to any of claims 2-3, characterized in that the electrical pulse containing the data is transmitted outside the range of stimulation frequencies.
    [7]
    The system according to claim 6, characterized in that the electrical pulse is transmitted using orthogonal frequency division multiplexing, OFDM.
    [8]
    The system according to any of the preceding claims, characterized in that at least one of the plurality of neurostimulators (120, ..., 120 ') comprises at least one sensor (124, ..., 124').
    [9]
    The system according to any of the preceding claims, characterized in that the at least one external control unit (110) comprises at least one user interface device (111) for delivering the data to a user of the system.
    [10]
    The system according to any of the preceding claims, characterized in that the, at least one, external control unit (110) is a portable external unit (708), portable by a user of the system that has the neurostimulators (120 , ..., 120 ') implanted as neurostimulatory elements (701, 702, 703, 704, 705, 706) in communication with the portable external unit (708).
    [11]
    The system according to any of the preceding claims, characterized in that at least one neurostimulator (800) of the plurality of neurostimulators (120, ..., 120 ') comprises a support substrate (810) with a circular geometry , an application specific integrated circuit (801), two or more electrodes (802) and one or more antennas (803) interconnected by connection tracks (804) on the support substrate (810).
    [12]
    The system according to any of the preceding claims, characterized in that at least one neurostimulator (900) of the plurality of neurostimulators (120, ..., 120 ') comprises a button-shaped substrate (910) with one or more holes (920) for attachment to the tissue (100), two or more electrodes (902) and one or more antennas (903) interconnected to a specific application integrated circuit (901).
    [13]
    The system according to any of the preceding claims, characterized in that at least one neurostimulator (1000) of the plurality of neurostimulators (120, ..., 120 ') comprises a substrate (1010) of elongated shape that is fixed to the body through suture holes (1020), two or more electrodes (1002) and a set of one or more flat antennas (1003) connected to a specific application integrated circuit (1001) by means of connection tracks (1004).
    [14]
    The system according to any of the preceding claims, characterized in that the electronic data processing unit (122, ..., 122 ') is implemented with an application-specific integrated circuit, ASIC; or in a microcontroller; or on a microprocessor; or in a matrix of programmable gates, FPGA; or in a complex programmable logic device, CPLD; or on a programmable PSoC system.
    [15]
    The system according to any of the preceding claims, characterized in that the electrical impulses are transmitted at a frequency selected to activate or to inhibit nerve or muscle cells of the tissue (100).
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    PCT/ES2020/070261| WO2020245477A1|2019-06-06|2020-04-24|Neurostimulation system|
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