CN106983506A - A kind of Implantable Medical Device telemetry system and the method for telemetering for being implanted into human body - Google Patents
A kind of Implantable Medical Device telemetry system and the method for telemetering for being implanted into human body Download PDFInfo
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- CN106983506A CN106983506A CN201710057773.7A CN201710057773A CN106983506A CN 106983506 A CN106983506 A CN 106983506A CN 201710057773 A CN201710057773 A CN 201710057773A CN 106983506 A CN106983506 A CN 106983506A
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- 238000000034 method Methods 0.000 title claims description 12
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 238000004891 communication Methods 0.000 claims description 51
- 238000002513 implantation Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000003814 drug Substances 0.000 claims description 4
- 238000013480 data collection Methods 0.000 claims description 2
- 238000001727 in vivo Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 229940079593 drug Drugs 0.000 claims 1
- 230000000747 cardiac effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000000661 pacemaking effect Effects 0.000 description 2
- 238000005424 photoluminescence Methods 0.000 description 2
- 230000001766 physiological effect Effects 0.000 description 2
- 230000035479 physiological effects, processes and functions Effects 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000037007 arousal Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000004556 brain Anatomy 0.000 description 1
- 210000002318 cardia Anatomy 0.000 description 1
- 229940030602 cardiac therapy drug Drugs 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000012377 drug delivery Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 210000005003 heart tissue Anatomy 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 210000005036 nerve Anatomy 0.000 description 1
- 230000009914 physiological arousal Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 230000034225 regulation of ventricular cardiomyocyte membrane depolarization Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/316—Modalities, i.e. specific diagnostic methods
- A61B5/318—Heart-related electrical modalities, e.g. electrocardiography [ECG]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0004—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by the type of physiological signal transmitted
- A61B5/0006—ECG or EEG signals
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0002—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network
- A61B5/0015—Remote monitoring of patients using telemetry, e.g. transmission of vital signals via a communication network characterised by features of the telemetry system
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/68—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient
- A61B5/6846—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive
- A61B5/6867—Arrangements of detecting, measuring or recording means, e.g. sensors, in relation to patient specially adapted to be brought in contact with an internal body part, i.e. invasive specially adapted to be attached or implanted in a specific body part
- A61B5/6869—Heart
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/362—Heart stimulators
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/372—Arrangements in connection with the implantation of stimulators
- A61N1/37211—Means for communicating with stimulators
- A61N1/37217—Means for communicating with stimulators characterised by the communication link, e.g. acoustic or tactile
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/372—Arrangements in connection with the implantation of stimulators
- A61N1/37211—Means for communicating with stimulators
- A61N1/37217—Means for communicating with stimulators characterised by the communication link, e.g. acoustic or tactile
- A61N1/37223—Circuits for electromagnetic coupling
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/36—Applying electric currents by contact electrodes alternating or intermittent currents for stimulation
- A61N1/372—Arrangements in connection with the implantation of stimulators
- A61N1/375—Constructional arrangements, e.g. casings
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N1/00—Electrotherapy; Circuits therefor
- A61N1/18—Applying electric currents by contact electrodes
- A61N1/32—Applying electric currents by contact electrodes alternating or intermittent currents
- A61N1/38—Applying electric currents by contact electrodes alternating or intermittent currents for producing shock effects
- A61N1/39—Heart defibrillators
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Veterinary Medicine (AREA)
- Biomedical Technology (AREA)
- Public Health (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Radiology & Medical Imaging (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Computer Networks & Wireless Communication (AREA)
- Cardiology (AREA)
- Biophysics (AREA)
- Surgery (AREA)
- Molecular Biology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
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- General Physics & Mathematics (AREA)
- Electrotherapy Devices (AREA)
Abstract
The invention discloses a kind of Implantable Medical Device telemetry system for being implanted into human body, the device includes：Housing, housing reaches a position of hull outside from the inside of housing built with a transmitter or a receiver, a conducting element；And a matching network makes at least one in a transmitter or receiver match with conducting element by electricity, wherein matches impedances of the selection of matching network and human body.
Description
Technical field
The present invention relates to a kind of Implantable Medical Device telemetry system and the method for telemetering for being implanted into human body.
Background technology
The equipment of many kinds of human implantables is developed, it provides the related treatment of polytype health, diagnosis
And/or monitoring.The example of these equipment --- being commonly referred to as implantable Medical Devices (IMDs) --- includes cardiac pacing
Device, cardioverter/defibrillator, muscle stimulation device (cardiomyostimulators), cardiac event monitor
(cardiac event monitor) including nerve, a variety of physiological arousal devices of muscle and brain depth stimulator, polytype
Physiology monitor and sensor and drug delivery system, only enumerate several.IMD typically comprises sealed fence or shell
Body shell body --- sometimes referred to as " tank " --- functional assembly inside included.In some IMD, head link actuator or connection
Device module is attached to housing housing, and connector modules promote the phase with the electron medical treatment wire of one or more lengthening
Connect.Head module is typically cast by relative rigid, insulation, nonconducting polymer.Head module includes conforming to
The installation surface fixed with offside wall matched somebody with somebody offside wall and mechanically abut housing of housing housing.
In general, typical Implantable Medical Device is furnished with metal shell, and on metal shell, assembling
There is the connector block of line trap.Above-mentioned such lead can be used for electro photoluminescence or for physiologically active or physiology shape
The sensing of condition.For example, implantable cardiac medical apparatus, such as pacemaker, can be used such wire to monitor the activity of heart, also
It can be used for the implementation of related cardiac therapy.In other words, implantable equipment can be recorded by sensing the electric signal that heart is sent
Illustrate the data that the data of the electrical signal of reaction, analysis have been recorded, generate the characteristic data of cardiomotility, heart is lived with this
Emotionally condition is monitored.Such Implantable Medical Device, such as those implanteds that can be operated under microprocessor guidance
Equipment, can generate related instruction data, the difference that these data can show that by above-mentioned cardiomotility situation to represent
Health status, and can store the data in holder.
The content of the invention
The present invention devises a kind of Implantable Medical Device for being implanted into human body to solve problems of the prior art
Telemetry system, the apparatus reduces the power attenuation of Implantable Medical Device, and internal data communication antenna is simple in construction.It is of the invention same
When disclose a kind of Implantable Medical Device method of telemetering, this method is relative to those legacy systems, and the communication of information can be in phase
To being completed in the shorter time, the data communication in the present invention can pass through external equipment.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of Implantable Medical Device telemetry system for being implanted into human body, the device includes：Housing, housing is built with a hair
Device or a receiver are sent, a conducting element reaches a position of hull outside from the inside of housing；And a matching
Network makes at least one in a transmitter or receiver match with conducting element by electricity, wherein the selection of matching network with
The matches impedances of human body.
As a kind of preferred scheme of the Implantable Medical Device telemetry system of implantation human body of the present invention, work as implantation
Property medicine equipment be implanted the resonant circuit that matching network and Body composition one carries quality factor when in human body.
It is described as a kind of preferred scheme of the Implantable Medical Device telemetry system of implantation human body of the present invention
Matching network includes a transformer, inductance element and capacity cell.
The present invention discloses a kind of method of telemetering of Implantable Medical Device, this method is comprised the steps of：
One implantable equipment, the implantable equipment includes a housing, wherein a built-in transmitter and a human body
Antenna, human body can be optimized and revised, used as antenna；
One outside individual communication device, the communication device has comprised at least a receiver being connected with antenna；
Internal transmitter produces an output signal, and human body is sent to by the human body antenna outside the apparatus casing that has been implanted into
Interior, the output signal is included in data by modulation, and the output signal is sent out by human body to the near-field communication amount of human peripheral
Go out electromagnetic wave；And it will receive the electromagnetism sent when the antenna of external communication device is placed within this near-field communication amount
Ripple, the receiver of the external communication device data collection from electromagnetic wave.
As a kind of preferred scheme of the method for telemetering of Implantable Medical Device of the present invention, output is sent to human body
The step of signal including existing to one modulation output current of transmission outside the apparatus casing being implanted into, to produce one in vivo
Asymmetric CURRENT DISTRIBUTION, includes the step of to human body input/output signal, and the lead stretched out from human body antenna is injected to body
Output current, meanwhile, device case provides a return path for output current.
Brief description of the drawings
Fig. 1 is the schematic diagram for the Implantable Medical Device for being used as a telemetry system part in the present invention by the use of human body.
Fig. 2 is the more detailed displaying of telemetry system shown in Fig. 1.
Fig. 3 is the transmitter of Implantable Medical Device in the present invention and the overall circuit block diagram of acceptor circuit.
Fig. 4 is the general frame signal of telemetry system shown in Fig. 1 and Fig. 2.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and detailed description.
Embodiment 1
Content shown in Fig. 1 is a kind of telemetry system 10 of the present invention, and the system is in the near field around human body 18
It is operated within traffic working range 20.Telemetry system 10 includes implantable equipment 12 and external communication device 15, this
Two kinds of equipment can carry out operation operation, to set up data communication link 16 between.
Relative to conventional telemetry systems, remote control system 10 can realize efficient remote measurement control, planted while can realize
More broad response distance between the equipment 12 and the data antenna of external communication device 15 that enter.In addition, relative to tradition system
System, system 10 can provide preferably higher message transmission rate, and relatively low current loss.
Communication antenna of the telemetry system 10 by the use of human body 18 as the equipment 12 being implanted into, for example, human body 18 is used as energy
The data communication antenna of Asymmetric Electric flow distribution is enough produced, the electromagnetic wave signal so generated by human body 18 can be sent to from vivo
In the range of receiving 20 of near-field communication amount potentiometer around human body 18.Electromagnetic wave signal, which is radiated, to be sent near field and leads to
In the range of receiving 20 of news amount, this can bring a variety of different advantages, and hereafter hereby this expansion is described.For example, from human-body emitting
The electromagnetic wave gone out is not solely restricted to around 12 implant sites of implantable equipment, but is full of positioned at whole people
In more extensive near-field communication amount working range 20 around body.Similarly, for receiving the external communication of electromagnetic wave signal
The data communication antenna of device 15 also can dispose and/or move into place any different position within the scope of near-field communication amount 20
Place is put, and does not interfere with the data communication link 16 set up between external communications equipment 15 and the equipment being implanted into 12.
Fig. 2 is the more detailed displaying of telemetry system 10 shown in Fig. 1.As shown in Fig. 2 the quilt of Implantable Medical Device 12
It is implanted in human body 18.The equipment 12 being implanted into contains shell 13, and housing central section part is the Implantable Medical Device 12 of good seal,
The equipment 12 can be made up of pacing circuitry, defibrillation circuit, battery etc..It is also equipped with as shown in Figure 3 and 4 in housing 13
Transmitter/receiver circuit 70.- at least one lead 14, is connected to implantable by feed-in guide hole (not showing) and cures
At the connector block position 17 for treating apparatus 12.For example, the implantable portion close to human heart 11 of Implantable Medical Device 12
At position.When Implantable Medical Device 12 is to be implanted into the pacemaker inside human body 18, the implantable pacemaker can be wrapped in the case
Containing at least one or whole pace-makings with sensing lead, these wires are uniformly represented as lead 14, adjoint for sensing
The electric signal of the sequences of ventricular depolarization of heart 11 and multipole, and is provided for causing the pace-making that heart tissue is depolarized near distal end
Pulse.
According to patent of the present invention, human body 18 is used as the data communication antenna of implantable equipment 12 under normal conditions, with
Sent from human body 18 to near-field communication amount 20 and may be mounted to that the external communication device within near-field communication amount working range is communicated
The electromagnetic wave that antenna can be received.Human body 18 receives what is sent by the transmitter in the medicine equipment 12 being implanted into
Output signal.Output signal is propagated in human body 18, and human body represents that this is defeated to outside radiant output in the form of an electromagnetic wave
Go out the electromagnetic wave of signal.For example, output current can be modulated by transmitter, to be included in from the end of lead 14 to human body 18
The brewed output current that inside is inputted, and pass through the return current signal of housing 13 for the equipment 12 being implanted into.As
Its internal circuit of human body 18 for the communication antenna of equipment 12 being implanted into is assigned as asymmetric nature, just because of this uneven bar
A kind of part, Net magnetic moment can be produced therewith, and the process is described further herein below.In the range of near-field communication amount 20
The magnetic field relevant with Net magnetic moment can electromagnetic signals in the range of whole traffic 20 in place around the human body 18, and
It is not to be limited to any privileged site near implantation equipment.For previous telemetry system antenna, due to
The region that human body can be used as signal communication source is very big, therefore human body 18 is obtained as the efficiency of the communication antenna of implantable equipment 12
To being obviously improved.
Traffic potentiometer 20 around human body 18 can promote the equipment 12 that has been implanted into and external communication device 15 it
Between data transfer communication, it is however generally that, in the range of the traffic potentiometer 20 should be placed within 6 feet away from human body.More
Preferable installation site is in the range of placing it within about 3 feet of human body.Produced by traffic potentiometer 20
Magnetic field range can generally exceed the size at equipment position that body be implanted into, for example, when heart Pacemaker implantation is arrived
During cardia, the magnetic field range produced by traffic potentiometer 20 is more than the size of body trunk.Due to the magnetic component in magnetic field
With the distance between source proportional therefore produced magnetic field can with the increasing of distance rapid decrease, that is to say, that
Magnetic field is according to 1/r3Speed decline, i.e. wherein r the distance between refers to magnetic field source human body 18.
Telemetry system 10 enough uses efficient coupling device, below in conjunction with matching network information shown in Fig. 4, to this portion
Point content is further described.Coupled structure enables to low output current to enter human body, and is transmitted wherein,
That is, a kind of asymmetric CURRENT DISTRIBUTION of generation in human body 18；In general, coupled structure includes one and human body impedance
The matching network of resonant circuit can be formed together, the quality factor (Q) of this kind of resonant circuit is to be optimal between 5 to 15.
Preferably Q scope 7 to 11 about.Although higher Q values can be realized, higher Q values may cause tolerance limit too small,
Receive frequency range to be restricted.Therefore the output current that the device transmitter being implanted into is produced is doubled by Q, and these can make for human body
For antenna enough energy are provided to the transmitting electromagnetic wave of traffic 20.The electromagnetic wave sent from human body is by external communication device
(15) received by antenna, be converted into electric signal, the data of transmission can be received by the receiver of external communication device.For example, band
The external communication device 15 for having programmable device 32 (programmable device magnetic head 30 is attached thereto by electric wire, with antenna) is movable near field
Traffic 20, to receive the electromagnetic wave of the transmitting of human body 18.
Similarly, human body 18 is usually implemented as receiving and (producing in the range of near-field communication amount 20) signal day of electromagnetic wave
Line.For example, with transmitter/receiver circuit, the external communication device 15 of modulated electric signal can be launched by antenna (in figure
It is further specified in 4), electromagnetic wave can be launched in the range of traffic 20.Human body 18 as Implantable Medical Device 12 letter
, there is CURRENT DISTRIBUTION by sensing in number antenna, thus receives electromagnetic wave of the transmitting from external communication device (15).By using coupling
Close structure, i.e. matching network (with a bandpass filter, tolerable working frequency passes through), the transmission of Implantable Medical Device
Device/acceptor circuit can receive and demodulate the modulation signal that human body antenna is sensed, that is, launch and believe from external communication device 15
The electromagnetic wave of number antenna.
Fig. 3 is a kind of block diagram of the building block of senior Implantable Medical Device 12, herein medicine equipment 12 and a base
Together it is implanted into the structure of microprocessor.But, the electrical characteristic of Implantable Medical Device 12 and operation can be it is single,
A discrete type logic or the system of Microcomputer can be used as.
As shown in figure 3, Implantable Medical Device 12, including at least one at least one processor 46 and holder 48
Microcomputer circuit 42.Microcomputer circuit 42 passes through a data communication bus 50 and the controller electrical equipment of input/output circuitry 40
Road 52 is connected.For example, microcomputer circuit 42 can be for one by the enhanced customization integrated circuit of standard RAM/ROM components.In addition,
Input/output circuitry 40 may also include in addition to controller 52, any for completing Implantable Medical Device (12) function
Other circuits.For example, input/output circuitry 40 may include induction amplifier, peak induction and threshold measurement unit, biased electrical
Road, impulse generator, threshold detector etc., and other input/output electricity required, that proper signal is sent to controller 52
Road.For the present invention, these circuits how to implement it is unimportant, they only need can respond Implantable Medical Device
It is required that producing signal, and/or physiological activity signal is correctly transmitted to controller 52, physiological activity refers to the natural shrinking of heart
Or the contraction under electro photoluminescence etc..The nature of heart and stimulation are shunk, as long as Implantable Medical Device 12 includes transmitter/receiver
Circuit 70, and be used for according to the present invention in telemetry system 10 as described herein.
Fig. 4 illustrates the block diagram of the telemetry system 10 based on the present invention, including the implantable equipment being implanted into human body 18
12, its lead 14 extends to the external position of housing 13 from housing 13.In addition, the external communication device 15 shown passes through implantation
Property equipment 12 sets up communication link 16.As it was previously stated, external communication device 15 includes transmitter circuit 60, the and of acceptor circuit 62
Antenna configuration 64, communication transfer is carried out via human body antenna 1 and implantable equipment 12.Implantable equipment 12 includes transmitter/connect
Receive device circuit 70 and matching network 80.Transmitter/receiver circuit 70 includes transmitter circuit 72 and acceptor circuit 74.Matching
Transmitter/receiver circuit 70 is coupled to the human body 18 as antenna by network 80.Although transmitter/receiver circuit 70 is shown
Only to include transmitter circuit 72 and acceptor circuit 74, but for controlling this transmitters and receivers circuit 72,74
Other circuits can also as Implantable Medical Device 12 a part, such as, can be with for the processor for controlling arousal function
Modulated data stream transmitted in control carrier signal to transmitter etc..In addition, other parts of implantable equipment 12, such as electric
Pond, power supply is provided for this circuit.
Generally, the transmitter circuit 72 of Implantable Medical Device 12 is equipped with a signal generator, generates output signal,
The signal is modulated to be included in the data for being sent to external communication device 15.The output signal of modulation is by matching network 80 to couple
Into human body 18.Optimal battery power electric current needed for driving transmitter circuit 72 is exported should be less than 50 microamperes.Optimal battery drives
Streaming current is at 5 microamperes to 50 microamperes or so.Such as this battery power electric current can be used for output current being injected into human body
In, electric current is at 10 microamperes to 300 microamperes or so.Although in addition, the carrier wave or working frequency of output signal be not limited to it is any specific
Scope, but frequency is more preferably less than 25MHz or so and more than 1MHz or so.Frequency optimum traffic is in 2MHz to 5MHz or so.
Such as working frequency can be in about 2.7MHz or so frequency range.However, the use of low frequency may be to potential data speed
Rate applies bad limitation.
In addition, the another way of profile matching network 80 is to select matching network 80 to hinder to match the human body of human body 18
Anti- 90.In other words, transferred power to by maximal efficiency and minimum distortion output signal in human body 18.By using matching
Human body impedance 90 of the matching of network 80 as antenna so that matching network and the formation resonant circuit of human body 18, maximized output
Signal is coupled in human body 18.
As described above, output signal is generally multiplied by the Q values of resonant circuit.
Generally, human body impedance 90 is at least dependent on working frequency, and additionally depends on the boundary between body and conducting element
Face, such as interface between point electrode, and human body and return path, the housing for the equipment being for example implanted into.For example, human body
Impedance 90 can be at 50 ohm to 500 ohms.
Various matching networks 80 can be used for transmitter/receiver circuit 70 being coupled to human body 18, be used as what is be implanted into
The signal antenna of equipment 12.Resistance, electric capacity and/or inductance component can be used to provide matching network 80.Pass through matching network
100 form the resonant circuit of series connection, and the matching network includes inductor 106, capacitor 108 and is connected to human body impedance 90
Resistor 110.As illustrated, transmitter/receiver circuit 70 be connected to be connected in series in inductor 106 and capacitor 108 it
Between, these are connected between point electrode 102 and housing 104 again.Housing 104 is connected to ground via resistor 110.
Although embodiments of the present invention are illustrated in specification, these embodiments are intended only as prompting,
It should not limit protection scope of the present invention.It is equal that various omission, substitution, and alteration are carried out without departing from the spirit and scope of the present invention
Should be comprising within the scope of the present invention.
Claims (5)
1. a kind of Implantable Medical Device telemetry system for being implanted into human body, it is characterised in that：Including implantable equipment and outside
Communication device, the implantable equipment includes：Housing, housing is built with a transmitter or a receiver, a conducting element
A position of hull outside is reached from the inside of housing；And a matching network makes a transmitter or receiver by electricity
In at least one match with conducting element, wherein matches impedances of the selection of matching network and human body.
2. the Implantable Medical Device telemetry system of implantation human body according to claim 1, it is characterised in that：Work as implantable
Medicine equipment is implanted the resonant circuit that matching network and Body composition one carry quality factor when in human body.
3. the Implantable Medical Device telemetry system of implantation human body according to claim 1, it is characterised in that：Described
Distribution network includes a transformer, inductance element and capacity cell.
4. a kind of method of telemetering of Implantable Medical Device, this method is comprised the steps of：
One implantable equipment, the implantable equipment includes a housing, wherein a built-in transmitter and a human body antenna,
Human body can be optimized and revised, be used as antenna；
One outside individual communication device, the communication device has comprised at least a receiver being connected with antenna；
Internal transmitter produces an output signal, is sent into the human body by the human body antenna outside the apparatus casing that has been implanted into,
The output signal is included in data by modulation, and the output signal sends electricity by human body to the near-field communication amount of human peripheral
Magnetic wave；And it will receive the electromagnetic wave sent when the antenna of external communication device is placed within this near-field communication amount,
The receiver of external communication device data collection from electromagnetic wave.
5. the method for telemetering of Implantable Medical Device according to claim 4, it is characterised in that：Output letter is sent to human body
Number the step of including existing to one modulation output current of transmission outside the apparatus casing being implanted into, to produce one in vivo not
Symmetrical CURRENT DISTRIBUTION, includes the step of to human body input/output signal, and the lead stretched out from human body antenna injects defeated to body
Go out electric current, meanwhile, device case provides a return path for output current.
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