JP2005066142A - Catheter type ultrasonic probe - Google Patents

Catheter type ultrasonic probe Download PDF

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JP2005066142A
JP2005066142A JP2003302275A JP2003302275A JP2005066142A JP 2005066142 A JP2005066142 A JP 2005066142A JP 2003302275 A JP2003302275 A JP 2003302275A JP 2003302275 A JP2003302275 A JP 2003302275A JP 2005066142 A JP2005066142 A JP 2005066142A
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catheter
tube
temperature
ultrasonic
blood vessel
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Toshio Ito
寿夫 伊藤
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Hitachi Ltd
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Aloka Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To simultaneously measure an ultrasonic tomography image inside the blood vessel and temperature distribution on the inner wall of the blood vessel at the same position. <P>SOLUTION: Wall face temperature sensors 2a-2d for measuring the temperature of the inner wall face of a tube, an extension member 4 which brings the wall face temperature sensors 2a-2d into contact with the in-tube wall face on which the wall face temperature sensors 2a-2d are mounted and to which an ultrasonic vibrator 1 irradiates an ultrasonic beam, an in-tube temperature sensor 3 for measuring the temperature of the inside of the tube, and a cover catheter 6 for storing the wall face temperature sensors 2 during not measuring, are equipped in the neighborhood of the ultrasonic vibrator of a catheter type ultrasonic probe. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、血管などの生体の管空器官内に挿入し、管内壁および管壁断層の超音波断層映像を得るカテーテル型超音波探触子の技術分野に属する。   The present invention belongs to the technical field of a catheter-type ultrasonic probe that is inserted into a hollow organ of a living body such as a blood vessel and obtains an ultrasonic tomographic image of a tube inner wall and a tube wall tomography.

世界的に最近の病死の主要な要因は心筋梗塞などの心臓血管の病であり、それは血管内のプラークが破損しその破片が血栓となり心臓の付近の血管を梗塞することにより引き起こされると言われている。また、脳梗塞も同様に脳の血管内部のプラークの破片が血栓となって脳の血管を梗塞するものである。
血管内でプラークの原因となる炎症を起こしている細胞やその細胞に付着している大きな脂肪の塊などの存在およびプラーク自体の存在を早期に発見し、プラークが成長して破損し血栓となる前に、炎症を起こしている細胞などを早期に治療することが心筋梗塞や脳梗塞に対して極めて効果の高い治療法となっている。 The main cause of recent death in the world is cardiovascular disease such as myocardial infarction, which is said to be caused by the destruction of plaque in the blood vessel and the debris becoming a thrombus infarcting blood vessels near the heart. ing. Similarly, in the case of cerebral infarction, plaque fragments inside the blood vessels of the brain become clots to infarct the blood vessels of the brain.
Early detection of the presence of inflamed cells that cause plaque in blood vessels and large fat masses attached to the cells and the presence of the plaque itself, and the plaque grows and breaks into a thrombus Early treatment of inflamed cells and the like has become an extremely effective treatment for myocardial infarction and cerebral infarction.

一般にカテーテル型超音波探触子は、血管などの管の中で超音波振動子を回転させながら超音波を送受波して管内壁および管壁断層の超音波断層映像を得るものであり、血管内のプラークの大きさや形状を確認する手法として用いられている。   In general, a catheter-type ultrasonic probe obtains an ultrasonic tomographic image of an inner wall of a tube and a tube wall fault by transmitting and receiving ultrasonic waves while rotating an ultrasonic transducer in a tube such as a blood vessel. It is used as a method for confirming the size and shape of the plaque.

図５は、従来のカテーテル型超音波探触子の構造を示す構造図であり、図５の（ａ）は側面図、（ｂ）は正面図である。
図５に示すようにカテーテル型超音波探触子は、円筒状のチューブ１８とその内部に組み込まれた超音波振動子１と超音波振動子１を回転させる回転軸１１および回転体１５から構成される。なお、チューブ１８の外径は血管に挿入できるように数ミリメートルの極めて細いものである。 5A and 5B are structural views showing the structure of a conventional catheter-type ultrasonic probe. FIG. 5A is a side view and FIG. 5B is a front view.
As shown in FIG. 5, the catheter-type ultrasonic probe includes a cylindrical tube 18, an ultrasonic transducer 1 incorporated therein, a rotating shaft 11 that rotates the ultrasonic transducer 1, and a rotating body 15. Is done. It should be noted that the outer diameter of the tube 18 is extremely thin such as several millimeters so that it can be inserted into a blood vessel.

超音波振動子１は、回転軸１１および回転体１５により回転しながら超音波ビーム１００で超音波を送受波して血管の内壁などから反射して戻ってきた反響信号を受信する。反響信号は図示されていない信号処理回路で処理され表示器に超音波断層映像として血管の断層像が表示される（例えば、特許文献１参照）。   The ultrasonic transducer 1 receives and transmits an ultrasonic wave with an ultrasonic beam 100 while being rotated by the rotating shaft 11 and the rotating body 15 and reflected and returned from the inner wall of the blood vessel. The echo signal is processed by a signal processing circuit (not shown), and a tomographic image of the blood vessel is displayed on the display as an ultrasonic tomographic image (see, for example, Patent Document 1).

図４は、血管の断面図と観測された超音波断層映像などを示した図で、図４の（ａ）に示す血管の断面は、（ｂ）に示す超音波断層映像として表示される。   FIG. 4 is a view showing a cross-sectional view of a blood vessel and an observed ultrasonic tomographic image, and the cross-section of the blood vessel shown in FIG. 4A is displayed as an ultrasonic tomographic image shown in FIG. 4B.

以上の通りカテーテル型超音波探触子による超音波断層映像は、血管内のプラークなどの異常な箇所の大きさや形状の診断に有効な方法である。   As described above, an ultrasonic tomographic image obtained by a catheter-type ultrasonic probe is an effective method for diagnosing the size and shape of an abnormal portion such as a plaque in a blood vessel.

しかしながら、カテーテル型超音波探触子によって観測された箇所がどのような状態であるか、すなわち、すでに治癒したプラークの痕跡なのか、あるいはこれから次第に増大してゆくプラークなのか、プラークの状況や程度などの質については診断しにくいという問題がある。
プラークの状況や程度などの質について観測できるものとして温度カテーテル(Thermography Catheter)が開発され実用化されている。 However, what is the state observed by the catheter-type ultrasound probe, that is, whether it is a trace of plaque that has already healed, or plaque that is gradually increasing, and the status and degree of plaque There is a problem that it is difficult to diagnose the quality.
A temperature catheter (Thermography Catheter) has been developed and put into practical use as a means of observing the quality of plaque conditions and degree.

図６は、従来の温度カテーテルの構造を示す構造図である。図６に示すように温度カテーテルは、複数の壁面温度センサ２ａ〜２ｎと、それらを取り付けて収縮および展張する籠型の展張部材４と、複数の壁面温度センサ２ａ〜２ｎを接続するフレキシブル接続基板２１と、展張部材４を取り付けた管状のカバーカテーテル６と、カバーカテーテル６の管内部およびの内部に挿通されたガイドワイヤ５から構成される。なお、図６には示されていないが、展張部材４の内部（ルーメン内部２２）には管内部の温度を計測する管内部温度センサが組み込まれている。   FIG. 6 is a structural diagram showing the structure of a conventional temperature catheter. As shown in FIG. 6, the temperature catheter includes a plurality of wall surface temperature sensors 2a to 2n, a saddle-shaped expansion member 4 that attaches and contracts and expands them, and a flexible connection substrate that connects the plurality of wall surface temperature sensors 2a to 2n. 21, a tubular cover catheter 6 to which the extension member 4 is attached, and a guide wire 5 inserted into and inside the tube of the cover catheter 6. Although not shown in FIG. 6, a pipe internal temperature sensor for measuring the temperature inside the pipe is incorporated in the extension member 4 (the lumen inside 22).

温度カテーテルを血管に挿入する時は、操作員の操作により展張部材４を管状のカバーカテーテル６よりも直径が小さい収縮した状態とし、展張部材４が観測する部位に到達すると展張部材４を展張させ、壁面温度センサ２ａ〜２ｎを血管の内壁に接触させて血管の内部の温度を計測する。   When the temperature catheter is inserted into the blood vessel, the expansion member 4 is contracted to have a diameter smaller than that of the tubular cover catheter 6 by the operation of the operator, and when the expansion member 4 reaches the observation site, the expansion member 4 is expanded. The wall surface temperature sensors 2a to 2n are brought into contact with the inner wall of the blood vessel to measure the temperature inside the blood vessel.

なお、各壁面温度センサ２ａ〜２ｎで計測された温度データは、展張部材４の内部に設けられた管内部温度センサで計測された温度データとの差をとることにより、各壁面の正確な温度分布を表すデータとなり表示される（例えば、特許文献２参照）。   The temperature data measured by the wall surface temperature sensors 2a to 2n is obtained by taking the difference between the temperature data measured by the tube internal temperature sensor provided inside the extending member 4 and the accurate temperature of each wall surface. Data representing the distribution is displayed (for example, see Patent Document 2).

図４の（ｃ）が血管内壁の観測された温度表示であり、プラークの部位の温度が他に比べて高いことが分かる。なお、図４の（ｃ）の温度表示は、図６において壁面温度センサを４個使用した場合のものである。   (C) of FIG. 4 is an observed temperature display of the inner wall of the blood vessel, and it can be seen that the temperature of the plaque portion is higher than the others. In addition, the temperature display of FIG.4 (c) is a thing when four wall surface temperature sensors are used in FIG.

以上の通り、温度カテーテルで計測した血管内壁の温度によって、例えば、その部位が高温である場合は炎症を起こし増殖している危険なプラークであり炎症を鎮めるための早期治療が必要であると診断し、その部位が低温である場合は炎症がおさまり治癒した痕跡であると診断することができる。このように温度カテーテルを用いることにより血管内壁のプラークの状況や程度などの質について診断することができる。
実開平５−５１３１２号公報（図１） 国際特許 ＷＯ ０２／１５７８０ Ａ１（Ｆｉｇ．１２） As described above, depending on the temperature of the inner wall of the blood vessel measured by the temperature catheter, for example, if the site is hot, it is a dangerous plaque that is inflamed and proliferating, and it is diagnosed that early treatment is needed to reduce inflammation However, when the site is at a low temperature, it can be diagnosed that the inflammation has subsided and has been healed. Thus, the use of a temperature catheter makes it possible to diagnose the quality such as the status and degree of plaque on the inner wall of the blood vessel.
Japanese Utility Model Laid-Open No. 5-51312 (FIG. 1) International Patent WO 02/15780 A1 (FIG. 12)

解決しようとする問題点は、血管内のプラークなどを診断する場合に、先ず、従来のカテーテル型超音波探触子を用いてプラークの有無とプラークの大きさや形状を診断し、次に、温度カテーテルを用いてプラークの状況や程度などの質について診断するという２つの方法が必要であり、この２つの方法による診断は、患者に大きな苦痛を与えるとともに診察する医師の多大な労力が必要になる。   The problem to be solved is that when diagnosing plaque in a blood vessel, etc., first, the presence or absence of plaque and the size and shape of plaque are diagnosed using a conventional catheter-type ultrasonic probe, and then temperature Two methods of diagnosing the quality, such as the status and degree of plaque, using a catheter are necessary. Diagnosis by these two methods is very painful for the patient and requires a great deal of labor from the doctor who performs the examination. .

さらに、従来のカテーテル型超音波探触子による診断および温度カテーテルによる診断において、診断する部位の位置精度が悪い場合にはカテーテル型超音波探触子と温度カテーテルの診断の部位がずれてしまい誤診する恐れがあり、それを防止するために、超音波診断時及び温度計測時にそれぞれＸ線観測などの他の手段を用いて診断部位の位置を精度良く計測しなければならない。   Furthermore, in conventional diagnostics using a catheter-type ultrasound probe and diagnostics using a temperature catheter, if the location accuracy of the site to be diagnosed is poor, the diagnostic site of the catheter-type ultrasound probe and the temperature catheter will be misaligned. In order to prevent this, it is necessary to accurately measure the position of the diagnostic part by using other means such as X-ray observation at the time of ultrasonic diagnosis and temperature measurement.

本発明の第１の構成は、血管などの生体の管空器官内に挿入し、管の中で超音波振動子を回転させて管内壁および管壁断層の超音波断層映像を取得する手段とともに下記の各手段を具備することを特徴とするカテーテル型超音波探触子である。
（イ）管の内壁面の温度を計測する温度計測手段
（ロ）温度計測手段が取り付けられ、超音波振動子が超音波ビームを照射する管内壁面に温度計測手段を接触させる展張手段
（ハ）管の内部の温度を計測する管内部温度計測手段
（ニ）非計測時に温度計測手段を収納する収納手段 The first configuration of the present invention includes a means for inserting into a living organ such as a blood vessel and rotating an ultrasonic transducer in the tube to acquire an ultrasonic tomographic image of the inner wall of the tube and the tube wall fault. A catheter-type ultrasonic probe comprising the following means.
(A) Temperature measuring means for measuring the temperature of the inner wall surface of the tube (b) A temperature measuring means is attached, and an expansion means for bringing the temperature measuring means into contact with the inner wall surface of the tube where the ultrasonic transducer irradiates the ultrasonic beam (c) Tube internal temperature measuring means for measuring the temperature inside the pipe (d) Storage means for storing the temperature measuring means when not measuring

本発明の第２の構成は、上記第１の構成において温度計測手段が複数であるカテーテル型超音波探触子である。   A second configuration of the present invention is a catheter-type ultrasonic probe having a plurality of temperature measuring means in the first configuration.

本発明の第３の構成は、上記第１の構成において温度計測手段が１個であり、展張手段が超音波振動子の送受波面前方に取り付けられ、温度計測手段が超音波振動子の超音波ビームが照射される管内壁面の部位に保護管を介して接触し超音波振動子とともに回転するものであることを特徴とするカテーテル型超音波探触子である。   According to a third configuration of the present invention, there is one temperature measuring unit in the first configuration, the stretching unit is attached in front of the transmission / reception surface of the ultrasonic transducer, and the temperature measuring unit is an ultrasonic transducer. A catheter-type ultrasonic probe characterized in that it is in contact with a portion of an inner wall surface of a tube irradiated with a sound beam via a protective tube and rotates together with an ultrasonic transducer.

本発明のカテーテル型超音波探触子は、従来別々に実施されていた超音波断層映像による診断と血管内壁の温度計測による診断が一度で済むという効果があり、患者に与える苦痛と診断する医師の労力を大幅に軽減できる。さらに、従来別々に実施することにより必要とされたそれぞれの診断における診断部位のＸ線観測などによる位置計測の回数が少なくてすみ、Ｘ線の被曝量の少ない診断を行うことができるものである。   The catheter-type ultrasonic probe of the present invention has the effect that diagnosis by the ultrasonic tomographic image and the diagnosis by measuring the temperature of the inner wall of the blood vessel, which have been performed separately, can be performed only once, and is a doctor who diagnoses the pain given to the patient Can greatly reduce labor. Furthermore, the number of times of position measurement by X-ray observation or the like of the diagnostic site required for each diagnosis required in the past can be reduced, and a diagnosis with a small amount of X-ray exposure can be performed. .

身体の血管は最も太い動脈から毛細血管まで様々な太さのものがあり、より数多くの血管の診断ができるように、カテーテル型超音波探触子は血管に挿入するときには全体の太さができるだけ細い方が良く、計測部位の血管内壁の温度を計測する時にはより太い血管の内壁まで計測できるように温度計測手段を取り付けた展張手段がより太くなるように展張できるものが望まれる。   Body blood vessels vary in thickness from the thickest arteries to capillaries, and catheter-type ultrasound probes can be as thin as possible when inserted into a blood vessel so that more blood vessels can be diagnosed. A thin one is better, and when measuring the temperature of the inner wall of the blood vessel at the measurement site, it is desired that the expanding means attached with the temperature measuring means can be expanded so that the inner wall of the thicker blood vessel can be measured.

図１は、本発明カテーテル型超音波探触子の第１の実施例の構造を示す構造図である。図１の（ａ）は展張部材４が展張して壁面温度センサ２ａ、２ｂ、２ｃ、２ｄ（２ｃ、２ｄは図１の（ｂ）に示す）が血管に接触している状態の構造図で、（ｂ）はＡ−Ａ断面図である。
カバーカテーテル６は、先端部（図１の（ａ）では左側）にガイドワイヤ挿通部１２を有する管状の形状で、その内側に管状の内部カテーテル１０が組み入れられている。これらの管の内部には回転力を伝達するワイヤ状の回転軸１１とその先端部に超音波振動子１が組み入れられ、超音波振動子１は回転軸１１によって回転させられて超音波の送受波を行う。 FIG. 1 is a structural diagram showing the structure of a first embodiment of the catheter-type ultrasonic probe of the present invention. FIG. 1A is a structural diagram in a state in which the stretching member 4 is stretched and the wall surface temperature sensors 2a, 2b, 2c, and 2d (2c and 2d are shown in FIG. 1B) are in contact with the blood vessel. (B) is AA sectional drawing.
The cover catheter 6 has a tubular shape having a guide wire insertion portion 12 at a distal end portion (left side in FIG. 1A), and a tubular inner catheter 10 is incorporated therein. Inside these tubes, a wire-like rotary shaft 11 for transmitting a rotational force and an ultrasonic transducer 1 are incorporated at the tip thereof, and the ultrasonic transducer 1 is rotated by the rotary shaft 11 to transmit and receive ultrasonic waves. Do the waves.

内部カテーテル１０の前方部には、バネ性を有する複数（図１では４本の場合を示す）の線状部材からなる展張部材４を有し、これに壁面温度センサ２ａ、２ｂ、２ｃ、２ｄ（２ｃ、２ｄは図１の（ｂ）に示す）が取り付けられ、各壁面温度センサは展張部材４によって血管８の内壁に押し当てられて温度を計測する。また、展張部材４の先端部（図１の（ａ）では左側）には管内部温度センサ３が取り付けられて血管８の中央部の温度を計測する。   The front portion of the internal catheter 10 has a stretch member 4 made of a plurality of linear members (showing four cases in FIG. 1) having spring properties, and wall surface temperature sensors 2a, 2b, 2c, 2d. (2c and 2d are shown in FIG. 1B), and each wall surface temperature sensor is pressed against the inner wall of the blood vessel 8 by the stretching member 4 to measure the temperature. A tube internal temperature sensor 3 is attached to the distal end portion (left side in FIG. 1A) of the stretching member 4 to measure the temperature of the central portion of the blood vessel 8.

壁面温度センサ２ａ、２ｂ、２ｃ、２ｄで計測された各温度データと管内部温度センサ３で計測された温度データはその差が温度演算部（図示していない）で求められて、血管の内壁面温度データとして表示される。
ガイドワイヤ５は、展張部材４の先端（図１の（ａ）では左端）に設けられたガイド機構部７と、カバーカテーテル６のガイドワイヤ挿通部１２とに挿通されている。 The difference between the temperature data measured by the wall surface temperature sensors 2a, 2b, 2c, and 2d and the temperature data measured by the tube internal temperature sensor 3 is obtained by a temperature calculation unit (not shown), Displayed as wall temperature data.
The guide wire 5 is inserted into the guide mechanism portion 7 provided at the distal end of the extension member 4 (the left end in FIG. 1A) and the guide wire insertion portion 12 of the cover catheter 6.

図２は、本発明カテーテル型超音波探触子の第1の実施例の展張部材の収納および展張状態を示す図である。図２の（ａ）は収納の状態、図２の（ｂ）は展張の状態を示す。
図２の（ａ）の収納状態は、本発明カテーテル型超音波探触子を血管に挿入するときおよび血管から引き抜くときの状態であり、内部カテーテル１０および展張部材４を管状のカバーカテーテル６の内部に引き込むことにより得られる。このような収納状態でカテーテル型超音波探触子は、ガイド機構部７とガイドワイヤ挿通部１２とに挿通されて血管内に挿入されているガイドワイヤ５にガイドされて血管の観測部位まで挿入され、また、観測部位から引き抜かれる。 FIG. 2 is a view showing a storage state and a stretched state of the stretching member of the first embodiment of the catheter-type ultrasonic probe of the present invention. FIG. 2A shows a stored state, and FIG. 2B shows a stretched state.
2A is a state when the catheter-type ultrasonic probe of the present invention is inserted into the blood vessel and when it is pulled out from the blood vessel, and the internal catheter 10 and the expansion member 4 are connected to the tubular cover catheter 6. It is obtained by pulling inside. In such a storage state, the catheter-type ultrasonic probe is inserted into the blood vessel observation site by being guided by the guide wire 5 inserted into the blood vessel through the guide mechanism portion 7 and the guide wire insertion portion 12. It is also pulled out from the observation site.

図２の（ｂ）の展張状態は、本発明カテーテル型超音波探触子によって血管の内壁の温度を計測するときの状態で、内部カテーテル１０および展張部材４を管状のカバーカテーテル６の内部から突き出すことによりバネ性のある展張部材４が収納状態から開放されて展張することにより得られる。   2B is a state when the temperature of the inner wall of the blood vessel is measured by the catheter-type ultrasonic probe of the present invention, and the internal catheter 10 and the expansion member 4 are moved from the inside of the tubular cover catheter 6. The projecting member 4 is obtained by expanding the springy stretchable member 4 by releasing it from the stored state.

このような構造のカテーテル型超音波探触子を用いることによって、図４の（ｂ）に示す超音波断層映像と（ｃ）に示す温度表示（分割型）が得られる。なお、実際の超音波断層映像には展張部材や壁面温度センサなどが血管内部に表示されるが、図４の（ｂ）ではそれらを省略してある。   By using the catheter type ultrasonic probe having such a structure, an ultrasonic tomographic image shown in FIG. 4B and a temperature display (divided type) shown in FIG. 4C are obtained. In an actual ultrasonic tomographic image, a stretch member, a wall surface temperature sensor, and the like are displayed inside the blood vessel, but they are omitted in FIG.

以上示した実施例１は、課題解決手段における第２の構成の実施例を示すものであり、壁面温度センサ２ａ、２ｂ、２ｃ、２ｄは課題解決手段における第１の構成の（イ）の温度計測手段を、展張部材４は（ロ）の展張手段を、管内部温度センサ３は（ハ）の管内部温度計測手段を、また、カバーカテーテル６は（ニ）の収納手段をそれぞれ具現化したものである。   The first embodiment described above shows an embodiment of the second configuration in the problem solving means, and the wall surface temperature sensors 2a, 2b, 2c, and 2d are the temperatures of (a) in the first configuration in the problem solving means. The measuring member, the extending member 4 (b), the tube internal temperature sensor 3 (c) the tube internal temperature measuring unit, and the cover catheter 6 (d) the storage unit are realized. Is.

図３は、本発明カテーテル型超音波探触子の第２の実施例の構造を示す構造図である。図３の（ａ）は展張部材４が展張して壁面温度センサ２ａが保護管９を介して血管８に接触している状態の構造図で、（ｂ）は展張部材４、壁面温度センサ２ａおよび保護管９がカバーカテーテル６の内部に収納されている状態の構造図で、（ｃ）はＢ−Ｂ断面図である。カバーカテーテル６は管状の形状でその内側に管状の内部カテーテル１０が組み入れられ、内部カテーテル１０の左端は回転座１３に固着されている。内部カテーテル１０の内部には回転軸１１とその先端部に超音波振動子１が組み入れられ超音波振動子１は回転軸１１によって回転させられながら超音波の送受波を行う。   FIG. 3 is a structural diagram showing the structure of a second embodiment of the catheter-type ultrasonic probe of the present invention. 3A is a structural diagram in a state in which the stretch member 4 is stretched and the wall surface temperature sensor 2a is in contact with the blood vessel 8 through the protective tube 9, and FIG. 3B is a structure diagram of the stretch member 4 and the wall surface temperature sensor 2a. FIG. 4 is a structural diagram of the state in which the protective tube 9 is housed inside the cover catheter 6, and FIG. The cover catheter 6 has a tubular shape, and a tubular inner catheter 10 is incorporated therein, and the left end of the inner catheter 10 is fixed to the rotary seat 13. Inside the internal catheter 10, the rotating shaft 11 and the ultrasonic transducer 1 are incorporated at the tip thereof, and the ultrasonic transducer 1 transmits and receives ultrasonic waves while being rotated by the rotating shaft 11.

壁面温度センサ２ａは、超音波振動子１の前方にバネ性のある線状部材からなる展張部材４に取り付けられて超音波振動子１とともに回転し、展張部材４によって保護管９に押し当てられこれを介して血管８の内壁に接触して温度を計測する。   The wall surface temperature sensor 2 a is attached to a stretching member 4 made of a spring-like linear member in front of the ultrasonic transducer 1, rotates together with the ultrasonic transducer 1, and is pressed against the protective tube 9 by the stretching member 4. Through this, the temperature is measured by contacting the inner wall of the blood vessel 8.

保護管９は、壁面温度センサ２ａが直接血管８の内壁面に接触して内壁面を損傷させることを防止するもので、超音波振動子１が放射する超音波に対しては透明で、また、血管の内壁の温度を壁面温度センサ２ａに良く伝導し、さらに、バネ性を有する極めて薄い膜状材で形成される。バランサー１４は、壁面温度センサが回転するときに異常振動が生じないようにするために付加される。
壁面温度センサ２ａで計測された温度データと管内部温度センサ３で計測された温度データは、温度演算部（図示していない）でその差分が求められて、血管の内壁面温度データとして表示される。 The protective tube 9 prevents the wall surface temperature sensor 2a from directly contacting the inner wall surface of the blood vessel 8 and damaging the inner wall surface, and is transparent to the ultrasonic wave radiated from the ultrasonic transducer 1, The temperature of the inner wall of the blood vessel is conducted well to the wall surface temperature sensor 2a, and further, it is formed of an extremely thin film-like material having a spring property. The balancer 14 is added to prevent abnormal vibration from occurring when the wall surface temperature sensor rotates.
The difference between the temperature data measured by the wall surface temperature sensor 2a and the temperature data measured by the tube internal temperature sensor 3 is obtained by a temperature calculation unit (not shown) and displayed as blood vessel inner wall surface temperature data. The

図３の（ｂ）の収納状態は、本発明カテーテル型超音波探触子を血管に挿入するときの状態であり、内部カテーテル１０に対してカバーカテーテル６を展張部材４の方向（図３の（ｂ）では左側）に押し込むことにより実現される。図３の（ａ）の展張状態は、逆に、内部カテーテル１０に対してカバーカテーテル６を展張部材４と反対の方向（図３の（ｂ）では右側）に引き出すことにより実施される。   3B is a state when the catheter-type ultrasonic probe of the present invention is inserted into a blood vessel, and the cover catheter 6 is placed in the direction of the expansion member 4 with respect to the internal catheter 10 (FIG. 3). This is realized by pushing into the left side in (b). 3A is implemented by pulling out the cover catheter 6 with respect to the internal catheter 10 in a direction opposite to the extending member 4 (on the right side in FIG. 3B).

このような構造のカテーテル型超音波探触子を用いることによって図４の（ｂ）に示す超音波断層映像と（ｄ）に示す温度表示（連続型）が得られ、これらの２つの映像は重ねて表示される。なお、実際の超音波断層映像には展張部材や壁面温度センサなどが血管内部に表示されるが、図４の（ｂ）ではそれらを省略してある。   By using the catheter-type ultrasonic probe having such a structure, an ultrasonic tomographic image shown in FIG. 4B and a temperature display (continuous type) shown in FIG. 4D are obtained. Overlaid. In an actual ultrasonic tomographic image, a stretch member, a wall surface temperature sensor, and the like are displayed inside the blood vessel, but they are omitted in FIG.

以上示した実施例２は、課題解決手段の第３の構成の実施例を示すものであり、壁面温度センサ２は課題解決手段の第１の構成の（イ）の温度計測手段を、展張部材４は（ロ）の展張手段を、管内部温度センサ３は（ハ）の管内部温度計測手段を、また、カバーカテーテル６は（ニ）の収納手段をそれぞれ具現化したものである。   The embodiment 2 described above shows an embodiment of the third configuration of the problem solving means, and the wall surface temperature sensor 2 is replaced with the temperature measuring means of (a) of the first configuration of the problem solving means as a stretching member. Reference numeral 4 embodies (b) expansion means, tube internal temperature sensor 3 (c) tube internal temperature measurement means, and cover catheter 6 (d) storage means.

本発明カテーテル型超音波探触子の第1の実施例の構造を示す構造図である。1 is a structural diagram showing the structure of a first embodiment of a catheter-type ultrasonic probe of the present invention. 本発明カテーテル型超音波探触子の第1の実施例の展張部材の収納および展張状態を示す図である。FIG. 3 is a view showing a storage state and a stretched state of the stretch member of the first embodiment of the catheter-type ultrasonic probe of the present invention. 本発明カテーテル型超音波探触子の第２の実施例の構造を示す構造図である。It is a structural diagram which shows the structure of 2nd Example of the catheter type ultrasonic probe of this invention. 血管の断面図と観測された超音波断層映像および温度表示を示す図である。It is a figure which shows the cross-sectional view of the blood vessel, the observed ultrasonic tomographic image, and the temperature display. 従来のカテーテル型超音波探触子の構造を示す構造図である。It is a structural diagram which shows the structure of the conventional catheter type | mold ultrasonic probe. 従来の温度カテーテルの構造を示す構造図である。It is a structural diagram which shows the structure of the conventional temperature catheter.

符号の説明Explanation of symbols

１ 超音波振動子
２ａ，２ｂ，２ｃ，２ｄ 壁面温度センサ
３ 管内部温度センサ
４ 展張部材
５ ガイドワイヤ
６ カバーカテーテル
７ ガイド機構部
８ 血管
９ 保護管
１０ 内部カテーテル
１１ 回転軸
１２ ガイドワイヤ挿通部
１３ 回転座
１４ バランサー DESCRIPTION OF SYMBOLS 1 Ultrasonic vibrator 2a, 2b, 2c, 2d Wall surface temperature sensor 3 Tube internal temperature sensor 4 Stretch member 5 Guide wire 6 Cover catheter 7 Guide mechanism part 8 Blood vessel 9 Protection tube 10 Internal catheter 11 Rotating shaft 12 Guide wire insertion part 13 Rotating seat 14 Balancer

Claims (3)

血管などの生体の管空器官内に挿入し、管の中で超音波振動子を回転させて管内壁および管壁断層の超音波断層映像を取得する手段とともに下記の各手段を具備することを特徴とするカテーテル型超音波探触子。
（イ）管の内壁面の温度を計測する温度計測手段
（ロ）温度計測手段が取り付けられ、超音波振動子が超音波ビームを照射する管内壁面に温度計測手段を接触させる展張手段
（ハ）管の内部の温度を計測する管内部温度計測手段
（ニ）非計測時に温度計測手段を収納する収納手段 It is inserted into a living organ such as a blood vessel, and the following means are provided together with means for acquiring an ultrasonic tomographic image of a tube inner wall and a tube wall fault by rotating an ultrasonic transducer in the tube. Characteristic catheter-type ultrasonic probe.
(A) Temperature measuring means for measuring the temperature of the inner wall surface of the tube (b) A temperature measuring means is attached, and an expansion means for bringing the temperature measuring means into contact with the inner wall surface of the tube where the ultrasonic transducer irradiates the ultrasonic beam (c) Tube internal temperature measuring means for measuring the temperature inside the pipe (d) Storage means for storing the temperature measuring means when not measuring 温度計測手段が複数である請求項１記載のカテーテル型超音波探触子。   The catheter-type ultrasonic probe according to claim 1, wherein there are a plurality of temperature measuring means. 温度計測手段が1個であり、展張手段が超音波振動子の送受波面前方に取り付けられ、温度計測手段が超音波振動子の超音波ビームが照射される管内壁面の部位に保護管を介して接触し超音波振動子とともに回転するものであることを特徴とする請求項１記載のカテーテル型超音波探触子。
































There is one temperature measuring means, the stretching means is attached in front of the transmitting / receiving surface of the ultrasonic transducer, and the temperature measuring means is attached to the part of the inner wall surface of the tube where the ultrasonic beam of the ultrasonic transducer is irradiated via a protective tube. The catheter-type ultrasonic probe according to claim 1, wherein the catheter-type ultrasonic probe is in contact with the ultrasonic transducer and rotates together with the ultrasonic transducer.
































JP2003302275A 2003-08-27 2003-08-27 Catheter type ultrasonic probe Pending JP2005066142A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005270425A (en) * 2004-03-25 2005-10-06 Terumo Corp Ultrasonic catheter and image diagnosis apparatus
JP2006305359A (en) * 2005-04-26 2006-11-09 Biosense Webster Inc Software product for three-dimensional cardiac imaging using ultrasound contour reconstruction
JP2009136679A (en) * 2007-12-05 2009-06-25 Biosense Webster Inc Anatomical modeling from 3-d image and surface mapping
WO2014068606A1 (en) * 2012-10-29 2014-05-08 テルモ株式会社 Vessel insertion type device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005270425A (en) * 2004-03-25 2005-10-06 Terumo Corp Ultrasonic catheter and image diagnosis apparatus
JP4554967B2 (en) * 2004-03-25 2010-09-29 テルモ株式会社 Ultrasonic catheter and diagnostic imaging apparatus
US8029446B2 (en) 2004-03-25 2011-10-04 Terumo Kabushiki Kaisha Ultrasonic imaging system and imaging method
JP2006305359A (en) * 2005-04-26 2006-11-09 Biosense Webster Inc Software product for three-dimensional cardiac imaging using ultrasound contour reconstruction
JP2009136679A (en) * 2007-12-05 2009-06-25 Biosense Webster Inc Anatomical modeling from 3-d image and surface mapping
WO2014068606A1 (en) * 2012-10-29 2014-05-08 テルモ株式会社 Vessel insertion type device

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