JPS6335232A - Circuit apparatus for recording induced potential - Google Patents
Circuit apparatus for recording induced potentialInfo
- Publication number
- JPS6335232A JPS6335232A JP61176750A JP17675086A JPS6335232A JP S6335232 A JPS6335232 A JP S6335232A JP 61176750 A JP61176750 A JP 61176750A JP 17675086 A JP17675086 A JP 17675086A JP S6335232 A JPS6335232 A JP S6335232A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- recording
- digital
- addition
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000007792 addition Methods 0.000 claims description 47
- 239000003550 marker Substances 0.000 claims description 26
- 230000000763 evoking effect Effects 0.000 claims description 17
- 230000000638 stimulation Effects 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 9
- 230000001939 inductive effect Effects 0.000 claims description 5
- 238000005259 measurement Methods 0.000 claims description 5
- 238000012545 processing Methods 0.000 description 12
- 210000004556 brain Anatomy 0.000 description 11
- 230000000241 respiratory effect Effects 0.000 description 8
- 230000029058 respiratory gaseous exchange Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 description 4
- 208000007204 Brain death Diseases 0.000 description 3
- 230000003925 brain function Effects 0.000 description 3
- 230000001186 cumulative effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000000214 mouth Anatomy 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 206010063292 Brain stem syndrome Diseases 0.000 description 1
- 206010028735 Nasal congestion Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000003872 anastomosis Effects 0.000 description 1
- 238000012550 audit Methods 0.000 description 1
- 210000000133 brain stem Anatomy 0.000 description 1
- 239000013256 coordination polymer Substances 0.000 description 1
- 238000013481 data capture Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 210000003928 nasal cavity Anatomy 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Landscapes
- Measurement And Recording Of Electrical Phenomena And Electrical Characteristics Of The Living Body (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔産業−■−の利用分野〕
本発明は、同一記録装置に脳波等と共に、例えば可聴音
刺激に対する脳誘発電位信号であるABR(audit
ory brainstem response)信号
の如き誘発信号加算波形を併記させるための誘発電位記
録用回路装置に関するものである。Detailed Description of the Invention [Field of Application in Industry -■-] The present invention is capable of recording ABR (audit
The present invention relates to an evoked potential recording circuit device for recording an evoked signal addition waveform such as a brain stem response signal.
〔従来の技術と発明が解決しようとする問題点〕脳幹の
機能停止に基ずく脳死判定に際し、記録紙において脳波
の平坦波形への移行を確認するだけでなく、呼吸波を併
記させたり、誘発電位監視装置で検出されたABR信号
の如き脳誘発信号の加算波形をX−Yプロッタで確認す
る方法は周知である。しかしながら、誘発信号と脳波を
同時にかつ連続的に測定することは、操作上からも経済
的にも医療機関にとって大きな負担となっていた。[Problems to be solved by the conventional technology and the invention] When determining brain death based on brain stem dysfunction, it is necessary to not only confirm the transition of brain waves to a flat waveform on recording paper, but also record respiratory waves or induce A method of checking the summed waveform of brain-evoked signals such as ABR signals detected by a potential monitoring device using an X-Y plotter is well known. However, simultaneous and continuous measurement of evoked signals and electroencephalograms has placed a heavy burden on medical institutions both operationally and economically.
したがって、前記3要素の波形を相互に経時的に対応さ
せることは難しく、診断精度」二も問題があった。また
、後にその判断を再検討するための適切な資料も残すこ
とができなかった。Therefore, it is difficult to make the waveforms of the three elements correspond to each other over time, which poses a problem in terms of diagnostic accuracy. Furthermore, it was not possible to preserve appropriate materials for later reconsidering the decision.
よって、本発明は平坦脳波への移行過程において誘発信
号の変化と密接な相関関係が在ることに着眼して、同一
記録装置の記録紙に少くとも脳波と共にABR波形を対
比可使に併記yせる誘発電位記録用回路装置を提供する
ことを目的とする。Therefore, the present invention focuses on the fact that there is a close correlation with changes in evoked signals during the transition process to flat brain waves, and at least records ABR waveforms along with brain waves on the recording paper of the same recording device for comparison. The object of the present invention is to provide a circuit device for recording evoked potentials.
この目的を達成するために、既に特願昭61−8704
8によりアナログ信号を出力とする誘発電位記録用回路
装置が提案されている。これに対して、本発明はライン
状ドツト印字素子等によるディジタル式記録装置での波
形併記を前提にして、第1図に示すように、脳波波形を
描記するディジタル式記録装置lに付属させるための誘
発電位記録用回路装置を次のように構成した。即ち、刺
激装置2からの音或は電気等の刺激に対して頭部に装着
された電極3に誘起されたABR信号の如き誘発信号を
検出する誘発信号検出回路lOと、加算器11a及びメ
モリllbを有し、このメモリ内容と誘発信号検出回路
lOから出力されディジタル化された誘発信号とを加算
してその加算結果をメモリIlbへ書込むことにより複
数回の刺激に対する誘発信号を累積する誘発信号加算回
路11と、記録紙1aに併記を行なうようにメモリll
bを直接もしくはバッファメモリを通して記録紙上で判
読しやすい波形となるように加算及び書込み速度よりも
Sい速度で加算誘発信号を読出すメモリ読出し制御回路
12と、読出された加算誘発信号をディジタル式記録装
置に整合するディジタル信号に変換して出力する記録用
出力回路13とから構成した。In order to achieve this purpose, we have already applied for patent application No. 61-8704.
No. 8 proposes a circuit device for recording evoked potentials that outputs an analog signal. In contrast, the present invention is based on the premise that waveforms can be recorded in a digital recording device using a line-shaped dot printing element, etc., and as shown in FIG. The evoked potential recording circuit device was constructed as follows. That is, an induced signal detection circuit 10 that detects an induced signal such as an ABR signal induced in an electrode 3 attached to the head in response to stimulation such as sound or electricity from the stimulation device 2, an adder 11a, and a memory. llb, and adds the contents of this memory to the digitalized inducing signal output from the inducing signal detection circuit IO and writes the addition result to the memory Ilb, thereby accumulating the inducing signals for multiple stimulations. The signal addition circuit 11 and the memory 11 are used to write data on the recording paper 1a at the same time.
A memory read control circuit 12 reads out the addition triggering signal at a speed S lower than the addition and writing speed so that the waveform b is easily readable on the recording paper directly or through a buffer memory, and a memory readout control circuit 12 reads out the addition triggering signal at a speed S lower than the addition and writing speed, and converts the read addition triggering signal into a digital type. It consists of a recording output circuit 13 that converts and outputs a digital signal compatible with a recording device.
この誘発電位記録用回路装置は、別のユニットにしてデ
ィジタル式記録装置lにオプションで装着可能にするか
又は内蔵させる。誘発信号検出用電極3は、脳波測定の
ものと共用にするか又は専用のものを別途に頭部に装着
する。メモリ読出し制御回路12は、誘発信号加算回路
11の加算−書込み制御部をCPUより構成することに
より、このCPUを兼用しても良い、誘発波形は脳波と
共通のチャネルに時分割で描記するか、又は専用のチャ
ネルで行う。また、記録紙!aでの誘発波形の解析をよ
り確実にするために1時間マーカ発生回路14を付設す
ることにより、メモリIlbの読出しと同期して加算誘
発波形の時間幅測定用ディジタルマーカ信号を発生させ
得る。加算回数データ発生回路15及び振幅マーカ発生
回路16を付設することにより、同様に加算回数データ
及び振幅測定用マーカ用のディジタル信号を発生させる
こともできる。This circuit arrangement for recording evoked potentials can be made into a separate unit and can be attached as an option to the digital recording device 1, or can be built into it. The evoked signal detection electrode 3 may be used in common with the electrode for electroencephalogram measurement, or a dedicated electrode may be separately attached to the head. The memory read control circuit 12 may be configured with a CPU as the addition/write control section of the induced signal addition circuit 11, so that this CPU may also be used.The induced waveform may be drawn in a time-sharing manner on the same channel as the brain waves. , or on a dedicated channel. Also, recording paper! By adding a 1-hour marker generation circuit 14 to more reliably analyze the induced waveform at point a, it is possible to generate a digital marker signal for measuring the time width of the addition induced waveform in synchronization with the readout of the memory Ilb. By adding an addition number data generation circuit 15 and an amplitude marker generation circuit 16, it is also possible to similarly generate addition number data and digital signals for amplitude measurement markers.
刺激装置2がくり返し刺激を発生すると、その都度誘発
信号検出回路!0で脳波に較べて高い周波数成分の誘発
信号が検出される。各誘発信号は誘発信号加算回路11
においてディジタル化され、メモリIlbに加算記憶さ
れた誘発信号と新たに入力した誘発信号が加算器11a
で加算されて再度メモリllbにストアされることによ
り、加算誘発信号が得られる。この加算誘発信号はメモ
リ読出し制御回路12により脳波と誘発信号との周波数
成分比に対応したlい速度で読出される。そして記録用
出力回路13でディジタル式記録装置1のインタフェー
ス条件に変換されて送出される。これによリ、記録紙!
al−には脳波波形と対比できるように誘発波形が併記
される。所望により、時間マーカ発生回路14、加算回
数データ発生回路15及び振幅マーカ発生回路16から
供給されるマーカ或はその他のデータも同時に描記され
得る。When the stimulation device 2 repeatedly generates stimulation, the induced signal detection circuit is activated each time! 0, an induced signal with a higher frequency component than the brain waves is detected. Each induced signal is generated by an induced signal addition circuit 11.
The triggering signal that has been digitized and stored in the memory Ilb and the newly input triggering signal are added to the adder 11a.
An addition triggering signal is obtained by adding the signals and storing them in the memory llb again. This addition induced signal is read out by the memory readout control circuit 12 at a speed corresponding to the frequency component ratio of the brain wave and the induced signal. Then, the recording output circuit 13 converts it into the interface conditions of the digital recording device 1 and sends it out. Here it is, recording paper!
The evoked waveform is also written in al- so that it can be compared with the electroencephalogram waveform. If desired, markers or other data supplied from the time marker generation circuit 14, addition number data generation circuit 15, and amplitude marker generation circuit 16 can also be drawn at the same time.
第2図において、20はライン状のドツト印字素子を配
列されたサーマルヘッドを備えたサーマル式の脳波計で
あり、脳波電極群2B及び呼吸センサ27からの検出信
号を入力とし、その増幅等を行う脳波計アンプ部21と
、その出力信号及び特設されたインタフェース22d(
後述)からの出力信号を基にディジタル印字信号を作成
して記録紙に波形記録を行なう記録部22とから構成さ
れている。この記録部は、脳波計アンプ部21の複数チ
ャネルの増幅出力を順に繰返し選択するマルチプレクサ
22aと、その選択信号をディジタル化するA/Dコン
バータ22bと、ディジタル化された増幅出力を一時的
に記憶するバッファ用RAM22cと、 ABRユニッ
ト30の記録用出力回路42からのディジタル出力信号
及びCPU4+(いずれも後述)へ制御信号を転送する
インタフェース22dと、この制御信号で制御されてイ
ンタフェース22dの出力信号をバッファ用RAM22
cに格納させると共に、このRAMに格納されたディジ
タル信号を各印字ラインごとに逐次ドツトデータに変換
するCPU22eと、このドツトデータをサーマルヘッ
ド駆動用のドツト印字信号に変換するドツト印字信号発
生回路22fと、このドツトデータを供給されてサーマ
ルヘッドの対応する印字素子を駆動して記録紙22hに
ドツト式に波形描記を行わせる駆動回路22gとより構
成されている。In FIG. 2, 20 is a thermal electroencephalograph equipped with a thermal head in which line-shaped dot printing elements are arranged. The electroencephalogram amplifier section 21, its output signal, and a specially provided interface 22d (
The recording section 22 generates a digital print signal based on an output signal from a device (to be described later) and records the waveform on recording paper. This recording section includes a multiplexer 22a that repeatedly selects the amplified output of a plurality of channels of the electroencephalogram amplifier section 21, an A/D converter 22b that digitizes the selected signal, and temporarily stores the digitized amplified output. an interface 22d that transfers a digital output signal from the recording output circuit 42 of the ABR unit 30 and a control signal to the CPU 4+ (both will be described later); Buffer RAM22
a CPU 22e that sequentially converts the digital signal stored in the RAM into dot data for each print line; and a dot print signal generation circuit 22f that converts this dot data into a dot print signal for driving the thermal head. and a drive circuit 22g which is supplied with this dot data and drives the corresponding printing element of the thermal head to draw a waveform in a dot manner on the recording paper 22h.
ABRユニット30は、脳波計アンプ部21の2チヤネ
ルの脳波信号がそれぞれにバイパス入力するバンドパス
フィルタより成る2チヤネルのABR信号検出回路31
.31aと、これらの出力信号を高速で交互に選択する
スイッチ回路32と、その選択された信号を逐次ディジ
タル化するA/Dコンバータ33と、加算処理用RAM
34と、A/Dコンバータ33の出力信号に対するデー
タ取り込み処理を高速で行なわせて加算処理用RAM3
4ヘスドアさせるデータ取り込み処理用DMA(dir
ect memory access)回路35と、記
録部22のマーカチャネル用に所定時間間隔のパルス状
マーカを発生する時間マーカ発生回路37と、累積刺激
回数を表わす符号を描記させる信号を出力する加算回数
データ発生回路38と、単位振幅及びABR波形のスタ
ートマーカを波形描記させるディジタル信号を発生する
振幅マーカ発生回路39と、100層S間隔でスピーカ
44を駆動して可聴音刺激を発生させる刺激信号発生p
o Q 40と、 CPU41と、 RAMを内蔵する
ことにより加算処理用RAM34の2チャネル分の20
0回の累積刺激ごとの加算結果1時間マーカ発生回路3
7.加算回数データ発生回路38及び振幅マーカ発生回
路39の出力信号を取込んで所定の時系列フォーマット
のディジタル信号を編成する記録用出力回路42とから
構成されている。The ABR unit 30 includes a two-channel ABR signal detection circuit 31 consisting of a bandpass filter to which two channels of electroencephalogram signals from the electroencephalogram amplifier section 21 are bypass-input.
.. 31a, a switch circuit 32 that alternately selects these output signals at high speed, an A/D converter 33 that sequentially digitizes the selected signals, and a RAM for addition processing.
34 and the RAM 3 for addition processing by performing data acquisition processing for the output signal of the A/D converter 33 at high speed.
4 DMA for data import processing (dir
ect memory access) circuit 35, a time marker generation circuit 37 that generates pulsed markers at predetermined time intervals for the marker channel of the recording section 22, and an addition number data generation circuit that outputs a signal for drawing a code representing the cumulative number of stimulations. circuit 38, an amplitude marker generation circuit 39 that generates a digital signal for waveform-drawing a start marker of a unit amplitude and ABR waveform, and a stimulation signal generation circuit 39 that generates an audible sound stimulus by driving a speaker 44 at intervals of 100 layers S.
o By incorporating Q 40, CPU 41, and RAM, 20 channels of addition processing RAM 34 can be used.
Addition result for each cumulative stimulation of 0 times 1 hour marker generation circuit 3
7. The recording output circuit 42 takes in the output signals of the addition count data generation circuit 38 and the amplitude marker generation circuit 39 and compiles digital signals in a predetermined time series format.
また、 へBRユニット30にはx−Yプロッタ43が
付属し、そのスイッチ操作により記録用出力回路42の
RAMにストアされている加算へBR信号を波形描記さ
せることができる。Furthermore, an x-y plotter 43 is attached to the BR unit 30, and by operating a switch thereof, a waveform of the BR signal can be plotted on the addition stored in the RAM of the recording output circuit 42.
CPU41はROM 、 RAM等を内蔵し、先f31
I器トして機能することにより加算処理用RAM34.
データ取り込み処理用DMA回路35及び記録用出力回
路42のRAMと共にABR信号の加算回路を構成し、
また加算処理用RAM34から200回ごとの加算結果
を加算処理時間より遅い約2秒で読出しを行わせるメモ
リ読出し制御回路も構成し、さらに前記各部22c 、
32.37〜39.40の動作タイミングの制w4等
を行う。The CPU41 has built-in ROM, RAM, etc.
The addition processing RAM 34.
Configures an ABR signal addition circuit together with the RAM of the data capture processing DMA circuit 35 and the recording output circuit 42,
It also constitutes a memory read control circuit that reads out the addition results every 200 times from the addition processing RAM 34 in approximately 2 seconds, which is slower than the addition processing time, and further includes the respective sections 22c,
The control w4 of the operation timing from 32.37 to 39.40 is performed.
呼吸センサ27は、第3図に示すように、1;各市中部
分への接触面271と、双方の鼻腔への対面部分272
.273と、口腔への対面部分274とを備えた感熱素
子用ホルダ270を一体に形成し、3個所の対面部分2
72〜274に呼吸気熱をそれぞれ検知し、かつこの検
知信号の合成信号を出力するように汀に直列もしくは並
列に接続された3個のサーミスタ、熱電対等の感熱素子
278〜278を取付けると共に、ホルダ270からは
合成信号を送出するリード@ 275を導出して構成さ
れている。そして接触面271が上唇正中部分へ粘着テ
ープ等で固定され、リード線275が1チヤネルの入力
信号を脳波計アンプ部21へ供給する。As shown in FIG. 3, the breathing sensor 27 includes: 1; a contact surface 271 to each inner part; and a facing part 272 to both nasal cavities;
.. 273 and a portion 274 facing the oral cavity, the heat-sensitive element holder 270 is integrally formed, and the three facing portions 2
Attaching heat-sensitive elements 278 to 278 such as three thermistors or thermocouples connected in series or parallel to the base so as to detect the respiratory heat at 72 to 274 and output a composite signal of the detection signals, respectively, The holder 270 is configured by leading out a lead @ 275 for sending out a composite signal. The contact surface 271 is then fixed to the midline of the upper lip with adhesive tape or the like, and the lead wire 275 supplies one channel of input signals to the electroencephalogram amplifier section 21.
以トのABRユニット30を用いて構成された脳機能監
視装置としての動作は次の通りである。The operation of the brain function monitoring device configured using the ABR unit 30 described above is as follows.
脳波計20においては、通常その記録紙22bに脳波電
極群2Bで誘起された多チャネルの脳波及び呼吸センサ
27で合成検知されたlチャネルの呼吸波が併記されて
いる。In the electroencephalograph 20, the multi-channel electroencephalogram induced by the electroencephalogram electrode group 2B and the l-channel respiratory wave synthesized and detected by the respiratory sensor 27 are usually written on the recording paper 22b.
ABRユニット30を脳波計20ヘセツトすると、その
2チヤネルの脳波信号が入力してくると共に、記録用出
力回路42からは記録用ディジタル信号が出力される。When the ABR unit 30 is set in the electroencephalograph 20, the two channels of electroencephalogram signals are inputted, and the recording output circuit 42 outputs a recording digital signal.
CPU41は刺激信号発生回路40へ1001S間
隔でパルス信号をくり返し出力し、スピーカ44からク
リック刺激音を発生させる。これにより、 ABR信号
検出回路31.31aにはABR信号の重畳した脳波信
号が入力し、脳波成分が除去される。 cpuitは
スイッチ回路32を刺激に同期して作動させ、交rfに
2チヤネルのへBR信号を高速で選択させてA/r)コ
ンバータ33でディジタルのABR信号に変換させる。The CPU 41 repeatedly outputs a pulse signal to the stimulation signal generation circuit 40 at intervals of 1001S, and causes the speaker 44 to generate a click stimulation sound. As a result, the brain wave signal on which the ABR signal is superimposed is input to the ABR signal detection circuit 31.31a, and the brain wave component is removed. The cpuit operates the switch circuit 32 in synchronization with the stimulation, causes the AC RF to select the two-channel BR signal at high speed, and converts it into a digital ABR signal by the A/R) converter 33.
データ取り込み処理用DNA回路35の出力は、前述の
選択動作に同期して加算処理用RAM34から読出され
たそれぞれのチャネルの加算ABR信号とCPU41で
加算されRAM34へ加算結果をストアされる。 20
0回の刺激に達すると、 CPU41は記録用出力回路
42へ加算処理用RAM34のデータを転送させると共
に1時間マーカ発生回路37、加算回数データ発生回路
38及び振幅マーカ発生回路39を作動させる。The output of the data acquisition processing DNA circuit 35 is added by the CPU 41 to the addition ABR signal of each channel read from the addition processing RAM 34 in synchronization with the aforementioned selection operation, and the addition result is stored in the RAM 34. 20
When 0 stimulations are reached, the CPU 41 transfers the data in the addition processing RAM 34 to the recording output circuit 42, and operates the 1-hour marker generation circuit 37, addition number data generation circuit 38, and amplitude marker generation circuit 39.
記録用出力回路42は、時間軸方向の512個のABR
データ、スタートマーカ、振幅マーカ及び加算回数デー
タを2チャネル分そして専用チャネルの時間マーカを取
込んで記録紙22h −1−の所定の時分割表示フォー
マットに対応したディジタル信号を作成する。CP■2
2eは、RAM22cに格納された各チャネルの脳波信
号及び記録用出力回路42からのインタフェース22d
を通しての信号を取込んで各ラインについてのドツトデ
ータに変換し、ドツト印字信号発生回路22「で変換さ
れたドツト印字信号で逐次記録紙22hに印字する。The recording output circuit 42 has 512 ABRs in the time axis direction.
A digital signal corresponding to a predetermined time-division display format of the recording paper 22h-1- is created by taking in the data, start marker, amplitude marker, and addition count data for two channels and the time marker of the dedicated channel. CP■2
2e is an interface 22d from the output circuit 42 for electroencephalogram signals and recording of each channel stored in the RAM 22c;
The signals from the dots are taken in and converted into dot data for each line, and the converted dot print signals are sequentially printed on the recording paper 22h by the dot print signal generation circuit 22''.
これにより、第4図に示すように(ABR波形の1チヤ
ネル分及びマーカチャネルのみ示す)、加算回数データ
発生回路3Bから出力される200回を意味するコード
信号A及びスタートマーカCが発生される。次いで、約
2秒間の加算ABR信号と振幅マーカ発生回路39から
の振幅マーカBが出力され、同時にマーカチャネルには
時間マーカDが出力される。約3秒経過すると、インタ
フェース22dからの信号の取込みを中断して再び脳波
を描記し、約20秒経過すると400回の加算ABR信
号を描記し、コード信号Aは400回を意味する符号に
なる。200回ごとに累積結果を描記しつつ、2.00
0回に達すると、加算動作を終了し、新たに測定を開始
する。As a result, as shown in FIG. 4 (only one channel of the ABR waveform and the marker channel are shown), a code signal A indicating 200 times and a start marker C are generated from the addition number data generation circuit 3B. . Next, the summed ABR signal for about 2 seconds and the amplitude marker B from the amplitude marker generation circuit 39 are output, and at the same time, the time marker D is output to the marker channel. After about 3 seconds have elapsed, the acquisition of the signal from the interface 22d is interrupted and the brain waves are drawn again, and when about 20 seconds have elapsed, an ABR signal of 400 additions is drawn, and the code signal A becomes a code that means 400 times. . 2.00 while drawing the cumulative result every 200 times.
When the number reaches 0, the addition operation is ended and a new measurement is started.
これにより、通常の脳波と、ABR波形と呼吸波とが経
時的に同じ記録紙に描記される。呼吸波は、鼻詰まりが
生じたり、口が閉じたために対面した感熱素子276〜
278が呼吸気を検知しなくなったとしても、残りの感
熱素子のものがモニタされる。As a result, normal brain waves, ABR waveforms, and respiratory waves are drawn on the same recording paper over time. Respiratory waves are caused by the heat-sensitive element 276 facing the face due to nasal congestion or mouth closing.
Even if 278 no longer detects breath air, those of the remaining heat sensitive elements are monitored.
尚、呼吸センサ27は、唇の吻合部に沿って2測具1−
の感熱素子を配置する等で全体として感熱素子を4個以
上にすることもできる。呼吸センサとしては、従来の呼
吸センサな1個にしても良いが、呼吸波が異常の場合、
呼吸センサを点検したり、付は換えを要することになる
。或は複数個所を同時にモニタする場合相応のリード線
を導出して多チャネルに波形表示する必要がある。
ABRユニット30の回路部分は脳波計20に内蔵させ
ることもできる。加算ABR波形は脳波波形と時分割式
に描記するのでなく、専用のチャネルに描記させること
もできる。また、本発明はスピーカ44から発生される
可聴音刺激に代えて、電気刺激等信の刺激方法によって
発生する誘発電位波形を記録させる場合でも、同様に実
施できる。Note that the respiratory sensor 27 is connected to two measuring tools 1- along the lip anastomosis.
The total number of heat-sensitive elements can be increased to four or more by arranging a number of heat-sensitive elements. As a respiration sensor, a single conventional respiration sensor may be used, but if the respiration wave is abnormal,
The breathing sensor will need to be checked or replaced. Alternatively, if multiple locations are to be monitored simultaneously, it is necessary to derive corresponding lead wires and display waveforms on multiple channels.
The circuit portion of the ABR unit 30 can also be built into the electroencephalograph 20. The added ABR waveform can be drawn in a dedicated channel instead of being drawn in a time-sharing manner with the electroencephalogram waveform. Furthermore, the present invention can be implemented in the same manner even when an evoked potential waveform generated by a stimulation method such as electrical stimulation is recorded instead of an audible stimulation generated from the speaker 44.
以−1−1本発明によれば、脳波、呼吸波、誘発電位波
形などの脳死判定に最低必要とされる項目が同時かつ経
済的に一台の装置で測定・記録できるようになる。これ
により、脳死判定を含めた脳機能の監視が容易、かつ高
精度にできるようになり、事後の再検討の資料としても
有意義となる。Below-1-1 According to the present invention, the minimum required items for determining brain death, such as electroencephalograms, respiratory waves, and evoked potential waveforms, can be measured and recorded simultaneously and economically with one device. This allows for easy and highly accurate monitoring of brain function, including brain death determination, and is also useful as material for post-mortem reexamination.
第1図は本発明による誘発電位記録用回路装置の回路構
成図、第2図は本発明を脳機能監視装置として実施した
場合の回路構成図、第3図はその呼吸センサの斜視図及
び第4図はその記録波形図である。FIG. 1 is a circuit configuration diagram of an evoked potential recording circuit device according to the present invention, FIG. 2 is a circuit configuration diagram when the present invention is implemented as a brain function monitoring device, and FIG. 3 is a perspective view and a diagram of the respiration sensor. FIG. 4 is a diagram of the recorded waveform.
Claims (5)
ジタル式記録装置の共通の記録紙に少くとも脳波と共に
誘発波形を併記させるための誘発電位記録用回路装置で
あって、刺激に反応して頭部に装着された電極に誘起さ
れる誘発信号を検出する誘発信号検出回路と、加算器及
びメモリを有し、このメモリ内容と前記誘発信号検出回
路から出力されてディジタル化された前記誘発信号とを
加算してその加算結果を前記メモリへ再度書込むことに
より複数回の前記刺激に反応する前記誘発信号を逐次加
算する誘発信号加算回路と、前記併記を行なうように前
記メモリの前記加算誘発信号を前記加算及び書込み速度
よりも遅い速度で読出すメモリ読出し制御回路と、読出
された前記加算誘発信号を前記ディジタル式記録装置に
整合するディジタル信号に変換して出力する記録用出力
回路とを備えて成る回路装置。(1) An evoked potential recording circuit device for recording at least an evoked waveform along with an electroencephalogram on a common recording paper of a digital recording device that records waveforms using digital print signals, which It has an induced signal detection circuit that detects an induced signal induced in the attached electrode, an adder, and a memory, and adds the contents of this memory and the digitized induced signal output from the induced signal detection circuit. an inducing signal addition circuit that sequentially adds the inducing signals that respond to a plurality of stimulations by rewriting the addition result to the memory; It comprises a memory read control circuit that reads at a speed slower than the addition and writing speed, and a recording output circuit that converts the read addition triggering signal into a digital signal matching the digital recording device and outputs it. circuit device.
通に使用される特許請求の範囲第1項記載の回路装置。(2) The circuit device according to claim 1, wherein the electrode for detecting the evoked signal is used in common with the electroencephalogram recording electrode.
出力回路からディジタル加算誘発信号と共に、この信号
の時間幅測定用のディジタルマーカ信号が出力される特
許請求の範囲第1項又は第2項記載の回路装置。(3) By providing a time marker generation circuit, the recording output circuit outputs a digital marker signal for measuring the time width of this signal together with the digital addition trigger signal. circuit device.
出力回路から記録用ディジタル加算誘発信号と共に、振
幅測定用のディジタルマーカ信号が出力される特許請求
の範囲第1項乃至第3項記載の回路装置。(4) The circuit according to any one of claims 1 to 3, wherein the recording output circuit outputs a digital marker signal for amplitude measurement together with a digital addition inducement signal for recording by including an amplitude marker generation circuit. Device.
録用出力回路から記録用ディジタル加算誘発信号と共に
、加算回数を表わすディジタル信号が出力される特許請
求の範囲第1項乃至第4項記載の回路装置。(5) The circuit according to any one of claims 1 to 4, wherein the recording output circuit outputs a digital signal representing the number of additions together with the recording digital addition inducement signal by providing the addition number data generation circuit. Device.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61176750A JPS6335232A (en) | 1986-07-29 | 1986-07-29 | Circuit apparatus for recording induced potential |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61176750A JPS6335232A (en) | 1986-07-29 | 1986-07-29 | Circuit apparatus for recording induced potential |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6335232A true JPS6335232A (en) | 1988-02-15 |
JPH0414976B2 JPH0414976B2 (en) | 1992-03-16 |
Family
ID=16019154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61176750A Granted JPS6335232A (en) | 1986-07-29 | 1986-07-29 | Circuit apparatus for recording induced potential |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6335232A (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5215996U (en) * | 1975-07-21 | 1977-02-04 | ||
JPS6047847A (en) * | 1983-08-25 | 1985-03-15 | Sanshin Ind Co Ltd | Exhaust gas cooling structure for outboard four-cycle internal combustion engine |
-
1986
- 1986-07-29 JP JP61176750A patent/JPS6335232A/en active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5215996U (en) * | 1975-07-21 | 1977-02-04 | ||
JPS6047847A (en) * | 1983-08-25 | 1985-03-15 | Sanshin Ind Co Ltd | Exhaust gas cooling structure for outboard four-cycle internal combustion engine |
Also Published As
Publication number | Publication date |
---|---|
JPH0414976B2 (en) | 1992-03-16 |
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