JPH0349456B2 - - Google Patents
Info
- Publication number
- JPH0349456B2 JPH0349456B2 JP61247223A JP24722386A JPH0349456B2 JP H0349456 B2 JPH0349456 B2 JP H0349456B2 JP 61247223 A JP61247223 A JP 61247223A JP 24722386 A JP24722386 A JP 24722386A JP H0349456 B2 JPH0349456 B2 JP H0349456B2
- Authority
- JP
- Japan
- Prior art keywords
- ultrasound
- fetal
- mother
- ultrasonic
- heart rate
- 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.)
- Expired - Lifetime
Links
- 230000001605 fetal effect Effects 0.000 claims description 23
- 238000002604 ultrasonography Methods 0.000 claims description 22
- 239000000523 sample Substances 0.000 claims description 20
- 238000012806 monitoring device Methods 0.000 claims description 15
- 210000003754 fetus Anatomy 0.000 claims description 10
- 230000033001 locomotion Effects 0.000 claims description 8
- 210000002458 fetal heart Anatomy 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 5
- 208000034702 Multiple pregnancies Diseases 0.000 claims description 4
- 238000000034 method Methods 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 5
- 210000003815 abdominal wall Anatomy 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 238000012544 monitoring process Methods 0.000 description 3
- 208000007914 Labor Pain Diseases 0.000 description 2
- 208000035945 Labour pain Diseases 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000000747 cardiac effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000002565 electrocardiography Methods 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 208000010496 Heart Arrest Diseases 0.000 description 1
- 208000036818 High risk pregnancy Diseases 0.000 description 1
- 208000036029 Uterine contractions during pregnancy Diseases 0.000 description 1
- 230000008774 maternal effect Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000035935 pregnancy Effects 0.000 description 1
- 238000004393 prognosis Methods 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は胎児監視装置、更に詳しくは多胎の監
視および記録のできる機能を備えた胎児監視装置
に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fetal monitoring device, and more particularly to a fetal monitoring device having the function of monitoring and recording multiple pregnancies.
胎児監視装置は、胎児心拍数と母体子宮収縮を
計測し、これを同時記録して胎児の予後を診断す
る装置であり、ハイリスク妊娠の管理には重要な
役割をする。
Fetal monitoring devices are devices that measure and simultaneously record fetal heart rate and maternal uterine contractions to diagnose fetal prognosis, and play an important role in the management of high-risk pregnancies.
特に多胎の妊娠はハイリクス妊娠となり易いた
め、胎児心拍数の連続監視はぜひとも必要である
が、従来から用いられている胎児心泊数検出にド
プラ効果等を利用した超音波ドプラ法による胎児
監視装置は一人用に考えられており、多胎の監視
には不適当である。 Continuous monitoring of the fetal heart rate is essential, especially since multiple pregnancies are prone to becoming hyperxic pregnancies. However, fetal monitoring devices that use the ultrasound Doppler method, which uses the Doppler effect, etc., to detect the fetal heart rate, which is conventionally used, are necessary. is intended for single use and is not suitable for monitoring multiple births.
したがつて、多胎の監視には複数の胎児監視装
置が必要となるが、従来の超音波ドプラ法では複
数の胎児監視装置から送出される超音波が互いに
干渉し、周波数の違いからビートを起こして胎児
心泊動検出ができないことがあつた。このため、
心泊の測定方法を変えて、１台の胎児監視装置は
超音波ドプラ法、他の胎児監視装置は心電法や心
音法によつて測定していた。 Therefore, multiple fetal monitoring devices are required to monitor multiple pregnancies, but in the conventional ultrasound Doppler method, the ultrasound waves sent from multiple fetal monitoring devices interfere with each other and cause beats due to the difference in frequency. In some cases, it was not possible to detect fetal heart motion. For this reason,
The method of measuring cardiac arrest was changed; one fetal monitoring device used Doppler ultrasound, and the other fetal monitoring devices used electrocardiography and phonocardial methods.
しかし、心電法は電極を直接児頭に装着するた
め破水（破膜）後でなければ利用できない。した
がつて、心音法が主に使われていたが、接触雑音
や外来騒音に弱い欠点があるため、悲観血でより
確実な胎児心泊検出法として現在一番よく使われ
ている超音波ドプラ法だけによる胎児監視装置が
望まれていた。
However, since electrocardiography involves attaching electrodes directly to the baby's head, it can only be used after the membranes have ruptured. Therefore, the heart sound method was mainly used, but because it has the disadvantage of being susceptible to contact noise and extraneous noise, the ultrasound Doppler method is currently the most used as a more reliable method for detecting fetal heartbeat. There was a desire for a fetal monitoring device that would only be required by law.
本発明の目的は、上記のような従来の欠点を除
去した超音波ドプラ法だけで、他胎の心泊数・胎
動を監視・記録する多胎用胎児監視装置を提供す
ることにある。 An object of the present invention is to provide a fetal monitoring device for multiple fetuses that monitors and records the heart rate and fetal movements of other fetuses using only the ultrasonic Doppler method, which eliminates the above-mentioned conventional drawbacks.
本発明は上記目的を達成するため、超音波を複
数個のプローブにより妊産婦体表面の異なる部位
からそれぞれ入射させ、母体内の対象とする複数
の部位からの反射超音波を再び前記複数個の超音
波プローブによつて前記複数の部位の各部位毎に
受信するように構成した。
In order to achieve the above object, the present invention injects ultrasound waves from different parts of the pregnant woman's body surface using a plurality of probes, and redirects the reflected ultrasound waves from the target parts of the mother's body back to the plurality of ultrasound waves. It was configured to receive information from each of the plurality of regions using a sonic probe.
この場合、各プローブからの超音波の周波数を
同一とすることが本発明の重要な要件であつて、
このような構成を採用することにより複数の超音
波間の干渉を回避し、母体内の対象とする部位が
複数個あり、多胎であつてもそれぞれの胎児の超
音波情報を得ることが可能となる。 In this case, it is an important requirement of the present invention that the frequency of the ultrasonic waves from each probe be the same.
By adopting this configuration, it is possible to avoid interference between multiple ultrasound waves, and to obtain ultrasound information for each fetus even if there are multiple target areas within the mother's body and multiple fetuses. Become.
すなわち、２台の同一機種の超音波ドプラ法心
泊検出装置を用いた場合、超音波周波数は似通つ
てはいるが、若干の相違がある。すると、この間
には両者の周波数差の周波数のビートを生ずるこ
とになるが、これが目的とするドプラ周波数の検
出範囲であると、検出器出力は不要なビートによ
る出力が生ずる結果となる。しかも、胎児心泊動
などによる反射超音波は微弱なものであるため、
目的信号よりも大きな出力が出て検出器の飽和現
象が生じるなどの妨害現象を生じ、目的を達成す
ることができなかつた。 That is, when two identical models of ultrasonic Doppler detection devices are used, although the ultrasonic frequencies are similar, there are some differences. Then, a beat with a frequency that is the difference between the two frequencies will be generated during this time, but if this is the target Doppler frequency detection range, the detector output will result in an output due to unnecessary beats. Moreover, since the reflected ultrasound waves from fetal cardiac movements are weak,
The output was larger than the target signal, causing disturbances such as saturation of the detector, making it impossible to achieve the target.
しかし乍ら、本発明においては、各プローブに
同一の発振器からの電気信号を供給して同一周波
数の超音波を発生させているので、前記のような
従来の不都合を生じることなく動作させるさせる
ことができる。 However, in the present invention, since an electric signal from the same oscillator is supplied to each probe to generate ultrasonic waves of the same frequency, it is possible to operate the probes without the above-mentioned disadvantages. I can do it.
そして更に本発明においては、前記複数個の各
超音波プローブから夫々得られるドプラ信号から
夫々の心泊数計数回路により胎児心泊数を得るよ
うに構成したので、複数の部位それぞれから情報
を得ることが可能となるものである。 Furthermore, in the present invention, the number of fetal heartbeats is obtained from the Doppler signals obtained from each of the plurality of ultrasound probes by the respective heartbeat counting circuits, so that information can be obtained from each of the plurality of parts. This makes it possible.
（実施例）
以下、本発明を図に示す実施例により詳細に説
明する。なお、本実施例は胎児が二人いる、すな
わち双胎用の実施例である。(Example) Hereinafter, the present invention will be explained in detail with reference to Examples shown in the drawings. Note that this example is for two fetuses, that is, for twins.
第１図および第２図において、１０，２０は超
音波プローブで、その内部には後述する送信用超
音波振動子１２，２２と、受信用超音波振動子１
３，２３が夫々取付けられており、第２図に示す
ように母体の腹壁Ｍ上に装着して使用される。 1 and 2, reference numerals 10 and 20 are ultrasonic probes, inside of which are ultrasonic transducers 12 and 22 for transmission, which will be described later, and ultrasonic transducer 1 for reception.
3 and 23, respectively, and is used by being attached to the abdominal wall M of the mother's body as shown in FIG.
１は超音波発振回路で、一定の周波数で発振さ
せる。１１，２１は超音波送信回路で、前記超音
波発信回路１からの電気信号で動作させ、２つの
送信用超音波振動子１２，２２から同一周波数の
超音波を出す。 1 is an ultrasonic oscillation circuit that oscillates at a constant frequency. Reference numerals 11 and 21 denote ultrasonic transmitting circuits, which are operated by electric signals from the ultrasonic transmitting circuit 1 and emit ultrasonic waves of the same frequency from two transmitting ultrasonic transducers 12 and 22.
この送信用超音波振動子１２，２２は、第２図
に示すように、第１児S1、第２児S2の心臓にそれ
ぞれ超音波が当たるようにプローブ１０，２０を
母体の腹壁Ｍ上に装着する。而して、送信用超音
波振動子１２，２２からの超音波の一部はそれぞ
れ第１児S1、第２児S2の体内組織やその境界面で
反射し、再び母体の腹壁Ｍ表面に帰つてくる。 As shown in FIG. 2, the transmitting ultrasonic transducers 12 and 22 move the probes 10 and 20 to the abdominal wall M of the mother's body so that the ultrasonic waves hit the hearts of the first child S 1 and the second child S 2 , respectively. Attach it on top. A part of the ultrasonic waves from the transmitting ultrasonic transducers 12 and 22 are reflected by the internal tissues of the first child S 1 and the second child S 2 and their interfaces, respectively, and are reflected again on the surface of the mother's abdominal wall M. I'll come back to
１３，２３は受信用超音波振動子で、反射され
てきた超音波を電気信号に変換し、該電気信号は
超音波受信回路１４，２４に入る。このとき、体
内の組織や境界面が運動していると、ドプラ効果
によつて周波数が偏移した受信波と送信波との差
の周波数成分を有する信号、すなわちドプラ信号
を受信回路１４，２４から得ることができる。 13 and 23 are ultrasonic transducers for reception, which convert reflected ultrasonic waves into electric signals, and the electric signals enter ultrasonic reception circuits 14 and 24. At this time, when tissues or interfaces within the body are in motion, a signal having a frequency component corresponding to the difference between the received wave and the transmitted wave whose frequency has shifted due to the Doppler effect, that is, the Doppler signal, is transmitted to the receiving circuits 14 and 24. can be obtained from.
そして、前記受信回路１４，２４から得た上記
ドプラ信号を、フイルタ１５，２５で胎児心泊動
によるドプラ信号成分だけとりだし、この胎児心
泊ドプラ信号を検波回路１６，２６で検波した
後、心泊数計数回路１７，２７で心泊数に変換
し、記録器４により第１児S1、第２児S2のそれぞ
れの心泊数を同時記録する。 Then, from the Doppler signals obtained from the receiving circuits 14 and 24, filters 15 and 25 extract only Doppler signal components due to fetal heart motion, and after detecting this fetal heart Doppler signal with detection circuits 16 and 26, the The number of nights counting circuits 17 and 27 convert it into the number of nights, and the recorder 4 records the number of nights of each of the first child S 1 and the second child S 2 at the same time.
一方腹壁Ｍ上のストレインゲージ２で検出され
た陣痛信号は、陣痛信号増幅回路３で増幅され、
同じく記録器４にて記録される。 On the other hand, the labor signal detected by the strain gauge 2 on the abdominal wall M is amplified by the labor signal amplification circuit 3,
Similarly, it is recorded by the recorder 4.
この陣痛に関する部分については、本発明に含
まれる部分ではないが、本発明は第１図のように
陣痛信号記録系と共に用いる場合が多いので、そ
の時の実施例として記載したものである。 Although this part related to labor pain is not included in the present invention, since the present invention is often used in conjunction with a labor pain signal recording system as shown in FIG. 1, it is described as an example for such a case.
以上の実施例では、二胎用の場合について述べ
たが、三胎以上の多胎についても振動子、送受信
器、フイルタ、心泊数計数回路や記録器のチヤン
ネル数を増やすことにより対応できる。また、こ
の例では、送受信の振動子を別々のものとして述
べたが、送信、受信を時分割することにより、同
一振動子で送受兼用とすることもできる。また、
各プローブは指向性や操作性等の面から送受振動
子を備えたものが使い易いが、必ずしもこれに限
るものでなく、送信用プローブと受信用プローブ
を別々に設けてもよく、又、送受が対をなす必要
もないことは明らかで、例えば１個の送信プロー
ブと３個の受信プローブといつた構成でも利用す
ることができる。 In the above embodiment, the case of two fetuses has been described, but it is also possible to deal with multiple fetuses of three or more by increasing the number of channels of the vibrator, transceiver, filter, heart rate counting circuit, and recorder. Furthermore, in this example, the transducers for transmission and reception are described as separate transducers, but by time-sharing transmission and reception, the same transducer can be used for both transmission and reception. Also,
It is easy to use each probe equipped with a transmitting and receiving transducer in terms of directivity and operability, but this is not necessarily the case. A transmitting probe and a receiving probe may be provided separately, or It is clear that there is no need for the probes to form a pair; for example, a configuration with one transmitting probe and three receiving probes can also be used.
本発明に係る多胎用胎児監視装置は、上記のよ
うに、超音波のドプラ効果を利用して母体内の胎
児の心泊数、胎動などを母体外から検知する胎児
監視装置において、同一周波数で動作し超音波の
送受信を行う複数個の超音波プローブによつて母
体表面の異なる位置から母体内の対象とする複数
の部位に向けて同一周波数の超音波を入射する手
段と、前記複数の部位から超音波の反射波を前記
複数個の超音波プローブによつて前記複数の部位
の各部位毎に受信する手段と、該受信する手段毎
に得られるドプラ信号から該ドプラ信号毎に胎児
心泊数を得るための前記受信する手段毎の心泊数
計数回路とを有する構成からなれものであるか
ら、ドプラ信号のみで多胎の同時心泊数および
各々の胎動記録が得られ、それらの関連を確認で
きるといつた効果がある。
As described above, the fetal monitoring device for multiple births according to the present invention is a fetal monitoring device that uses the Doppler effect of ultrasound to detect the heart rate, fetal movements, etc. of the fetus inside the mother's body from outside the mother's body. means for injecting ultrasonic waves of the same frequency from different positions on the surface of the mother's body toward a plurality of target parts within the mother's body by means of a plurality of ultrasound probes that operate and transmit and receive ultrasound; and said plurality of parts means for receiving reflected waves of ultrasound from each of the plurality of regions by the plurality of ultrasound probes; Since the configuration includes a cardiac count counting circuit for each of the receiving means for obtaining the number of heartbeats, it is possible to obtain the simultaneous heartbeat count of multiple fetuses and each fetal movement record using only Doppler signals, and to understand the relationship between them. It is effective if you can confirm it.
第１図は本発明に係る多胎用胎児監視装置のブ
ロツク図、第２図は母体表面に超音波プローブを
あてた実施例を示す説明図である。
１……超音波発信回路、２……ストレインゲー
ジ、３……陣痛信号増幅回路、４……記録器、１
１，２１……超音波送信回路、１２，２２……送
信用超音波振動子、１３，２３……受信用超音波
振動子、１４，２４……超音波受信回路、１５，
２５……フイルタ、１６，２６……検波回路、１
７，２７……心泊数計数回路、１０，２０……超
音波プローブ。
FIG. 1 is a block diagram of a multiple fetal monitoring device according to the present invention, and FIG. 2 is an explanatory diagram showing an embodiment in which an ultrasonic probe is applied to the surface of a mother's body. 1... Ultrasonic transmission circuit, 2... Strain gauge, 3... Labor signal amplification circuit, 4... Recorder, 1
1, 21... Ultrasonic transmitting circuit, 12, 22... Ultrasonic transducer for transmitting, 13, 23... Ultrasonic transducer for receiving, 14, 24... Ultrasonic receiving circuit, 15,
25... Filter, 16, 26... Detection circuit, 1
7, 27... Heart rate counting circuit, 10, 20... Ultrasonic probe.
Claims (1)
の心拍数、胎動などを母体外から検知する胎児監
視装置において、同一周波数で動作し超音波の送
受信を行う複数個の超音波プローブによつて母体
表面の異なる位置から母体内の対象とする複数の
部位に向けて同一周波数の超音波を入射する手段
と、前記複数の部位からの超音波の反射波を前記
複数個の超音波プローブによつて前記複数の部位
の各部位毎に受信する手段と、該受信する手段毎
に得られるドプラ信号から該ドプラ信号毎に胎児
心拍数を得るための前記受信する手段毎の心拍数
計数回路とを有することを特徴とする多胎用胎児
監視装置。1 Fetal monitoring devices that use the Doppler effect of ultrasound to detect the heart rate and fetal movements of a fetus inside the mother from outside the mother's body use multiple ultrasound probes that operate at the same frequency and transmit and receive ultrasound. means for injecting ultrasonic waves of the same frequency from different positions on the surface of the mother's body toward a plurality of target parts within the mother's body; and a means for transmitting reflected waves of the ultrasound from the plurality of parts to the plurality of ultrasound probes. Therefore, means for receiving signals for each of the plurality of regions, and a heart rate counting circuit for each of the receiving means for obtaining a fetal heart rate for each Doppler signal from the Doppler signal obtained for each of the receiving means. A fetal monitoring device for multiple pregnancies characterized by having the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24722386A JPS6399844A (en) | 1986-10-17 | 1986-10-17 | Embryo monitor apparatus for multiple birth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24722386A JPS6399844A (en) | 1986-10-17 | 1986-10-17 | Embryo monitor apparatus for multiple birth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6399844A JPS6399844A (en) | 1988-05-02 |
| JPH0349456B2 true JPH0349456B2 (en) | 1991-07-29 |
Family
ID=17160282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24722386A Granted JPS6399844A (en) | 1986-10-17 | 1986-10-17 | Embryo monitor apparatus for multiple birth |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6399844A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014080032A1 (en) * | 2012-11-26 | 2014-05-30 | Ferring B.V. | Method and system for diagnosing uterine contraction levels using image analysis |
| CN105615918A (en) * | 2016-03-15 | 2016-06-01 | 长春智慧物联科技有限公司 | Multi-fetus heartbeat and movement monitor based on wireless protocol |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS578812Y2 (en) * | 1976-10-28 | 1982-02-19 |
-
1986
- 1986-10-17 JP JP24722386A patent/JPS6399844A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6399844A (en) | 1988-05-02 |
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