JPH08299472A - Hyperthermia device - Google Patents
Hyperthermia deviceInfo
- Publication number
- JPH08299472A JPH08299472A JP11096995A JP11096995A JPH08299472A JP H08299472 A JPH08299472 A JP H08299472A JP 11096995 A JP11096995 A JP 11096995A JP 11096995 A JP11096995 A JP 11096995A JP H08299472 A JPH08299472 A JP H08299472A
- Authority
- JP
- Japan
- Prior art keywords
- matching
- high frequency
- duty ratio
- impedance
- conductors
- 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.)
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- Electrotherapy Devices (AREA)
- Radiation-Therapy Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、温熱治療器に関する
ものであり、特に、一対の導子を人体の患部に挟着し、
該一対の導子間に高周波を発生させて、前記患部を温熱
治療する高周波温熱治療器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thermotherapy device, and in particular, a pair of conductors are attached to an affected part of a human body,
The present invention relates to a high-frequency hyperthermia treatment device which heat-treats the affected area by generating a high frequency between the pair of conductors.
【０００２】[0002]
【従来の技術】高周波温熱治療器は、周波数、数MHz 〜
数十MHz の高周波帯電磁波を利用するものであるため、
電力損失を最小にして効率良く治療を行うには、該高周
波温熱治療器の出力インピーダンスを負荷である人体の
インピーダンスに整合させる必要がある。2. Description of the Related Art A high frequency hyperthermia device has a frequency of several MHz
Since it uses high frequency electromagnetic waves of several tens of MHz,
In order to minimize the power loss and perform the treatment efficiently, it is necessary to match the output impedance of the high-frequency thermotherapy device with the impedance of the human body as a load.
【０００３】そこで、本体である高周波発生手段と出力
端子である導子との間には整合手段が設けられている。
該整合手段は患者が自らつまみを回して調節する手動式
のものと、ＣＰＵを内蔵して整合状態を判定し、自動的
に整合を行う自動制御式のものとがある。Therefore, matching means is provided between the high frequency generating means which is the main body and the conductor which is the output terminal.
The matching means includes a manual type in which the patient adjusts the knob by himself / herself, and an automatic control type in which the CPU has a built-in CPU to determine the matching state and automatically perform the matching.
【０００４】[0004]
【発明が解決しようとする課題】患者が導子を装着する
ため、または装着し直すために一対の導子を夫々の手で
把持して動かしている場合や１個の導子を胴体等に装着
して他の導子を片手に把持して動かしている場合は、負
荷インピーダンスが激しく変動しているので、通常整合
状態から外れている。一方、かかる状態から両手を点接
触させたり、導子を持った手を身体の何れかの部位に点
接触させると、その時点で負荷インピーダンスの変動が
停止することになる。この時、インピーダンス整合をと
ろうとすると、該点接触した部位にエネルギーが集束し
て火傷をする危険性が高い。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention When a patient holds a pair of conductors with his / her hands to move or remount the conductors, or one conductor is attached to a body or the like. When the other conductor is attached and is moved while being grasped with one hand, the load impedance fluctuates drastically, so that the condition is usually out of alignment. On the other hand, if both hands are point-contacted with each other or the hand holding the conductor is point-contacted with any part of the body from this state, the fluctuation of the load impedance is stopped at that point. At this time, if impedance matching is attempted, energy is focused on the point-contacted portion, and there is a high risk of burns.
【０００５】特に、整合を自動制御している高周波温熱
治療器は、整合状態から外れると自動的に整合をとろう
とするので、上述の如き点接触をした場合、直ちにイン
ピーダンス整合がなされ、一瞬の中に火傷してしまう危
険が極めて高い。従って、患者はかかる点接触をしない
ように絶えず注意していなければならない。また、手動
式の場合も点接触している状態ではインピーダンス整合
をとらないように留意しておく必要がある。しかし、不
注意や不慮による火傷の危険が常に伴っている。In particular, the high-frequency hyperthermia device which automatically controls the matching tries to automatically perform the matching when it is out of the matching state. Therefore, when the point contact as described above is made, the impedance matching is immediately performed and the instantaneous matching is performed. The risk of getting burned inside is extremely high. Therefore, the patient must constantly be careful not to make such point contacts. Also in the case of the manual type, it is necessary to pay attention so that impedance matching is not taken in the state of point contact. However, there is always the risk of inadvertent or accidental burns.
【０００６】そこで、かかる整合動作中の不注意や不慮
による火傷を防止して高周波温熱治療器の安全性を向上
させるために解決されるべき技術的課題が生じてくるの
であり、本発明は該課題を解決することを目的とする。Therefore, there arises a technical problem to be solved in order to prevent inadvertent or accidental burns during the matching operation and improve the safety of the high-frequency hyperthermia treatment device. It aims to solve problems.
【０００７】[0007]
【課題を解決するための手段】本発明は上記課題を解決
するために提案されたものであり、高周波発生手段と一
対の導子との間に整合手段を設け、該整合手段によって
出力インピーダンスを前記一対の導子間の負荷インピー
ダンスに整合させるように形成された温熱治療器におい
て、高周波発生手段の出力をスイッチング制御する制御
手段を設け、整合動作中は該制御手段により、前記高周
波発生手段のデューティ比が安全領域に入るようにスイ
ッチング制御するとともに、整合動作終了後は該制御手
段により、整合動作終了後所定時間中に前記デューティ
比を、前記安全領域から増大させるようにスイッチング
制御する温熱治療器を提供するものである。The present invention has been proposed in order to solve the above-mentioned problems, and a matching means is provided between a high frequency generating means and a pair of conductors, and the output impedance is adjusted by the matching means. In the thermotherapy device formed to match the load impedance between the pair of conductors, a control means for switching control of the output of the high frequency generating means is provided, and during the matching operation, the control means controls the output of the high frequency generating means. A thermal treatment in which switching control is performed so that the duty ratio falls within the safety region, and after the matching operation is completed, the control means performs switching control so that the duty ratio is increased from the safety region within a predetermined time after the completion of the matching operation. To provide a container.
【０００８】[0008]
【作用】導子を装着し直す等の動作を行なうと整合状態
から外れる。この状態からインピーダンス整合をとろう
とすると、高周波発生手段のデューティ比は小さくなっ
て、たとえ点接触していたとしても火傷をすることがな
い程度の安全領域に入ることになる。When the conductor is reattached or the like, the alignment is lost. If impedance matching is attempted from this state, the duty ratio of the high-frequency generation means becomes small, and even if it is in point contact, it will be in a safe area where burns will not occur.
【０００９】そして、整合がとれた場合は直ちにデュー
ティ１００％になるのではなく、所定時間かけて徐々に
出力が上げられていく。従って、たとえ点接触していた
としても、患者はその部位が熱くなっていることを感知
することができ、反射的に手を離す等により火傷を回避
することができる。When the matching is achieved, the duty does not become 100% immediately but the output is gradually increased over a predetermined time. Therefore, even if there is a point contact, the patient can sense that the site is hot, and can avoid a burn by reflexively releasing the hand.
【００１０】[0010]
【実施例】以下、本発明の一実施例を図１乃至図３に従
って詳述する。図１は自動制御によりインピーダンス整
合を行う高周波温熱治療器１の構成図を示し、高周波発
生装置２は高周波発振回路、共振回路および複数段の増
幅回路によって構成され、該高周波発生装置２の出力は
バラン３および整合回路４を介して出力コネクタ５，５
に伝送される。出力コネクタ５，５には夫々銅網を絶縁
材質の布で被覆した可塑性導子６，６が延設されてい
る。該導子６，６を患部に挟着すれば、該導子６，６間
に周波数、数MHz 〜数十MHz の高周波帯電磁波が発生し
て、該患部を誘電加熱することにより快方治癒する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to FIGS. FIG. 1 is a block diagram of a high-frequency thermotherapy device 1 that performs impedance matching by automatic control. A high-frequency generator 2 is composed of a high-frequency oscillator circuit, a resonance circuit, and a plurality of stages of amplifier circuits, and the output of the high-frequency generator 2 is Output connectors 5, 5 via balun 3 and matching circuit 4
Be transmitted to. The output connectors 5 and 5 are respectively provided with plastic conductors 6 and 6 in which a copper net is covered with a cloth made of an insulating material. If the conductors 6 and 6 are sandwiched between the affected parts, a high frequency electromagnetic wave having a frequency of several MHz to several tens of MHz is generated between the conductors 6 and 6, and the affected parts are dielectrically heated to cure comfortably. To do.
【００１１】而して、該高周波温熱治療器１の出力イン
ピーダンスＺO と、前記導子６，６により挟着された患
部の負荷インピーダンスＺL との整合を行うために、前
記整合回路４には可変コンデンサ７が搭載されるととも
に、該整合回路４を流れる負荷電流Ｉを検出する電流検
出部８が付設され、該電流検出部８の出力は制御部９に
接続されている。該制御部９は前記電流検出部８によっ
て検出された負荷電流Ｉに基づき整合状態を判定して、
整合状態から外れている場合にはモータ１０を駆動する
ことにより前記可変コンデンサ７を操作する。斯くし
て、出力インピーダンスＺO が負荷インピーダンスＺL
に整合するように自動制御が行われる。In order to match the output impedance Z O of the high-frequency thermotherapy device 1 with the load impedance Z L of the affected part sandwiched by the conductors 6 and 6, the matching circuit 4 is provided. Is equipped with a variable capacitor 7 and is additionally provided with a current detector 8 for detecting a load current I flowing through the matching circuit 4, and the output of the current detector 8 is connected to a controller 9. The control unit 9 determines the matching state based on the load current I detected by the current detection unit 8,
If it is out of alignment, the variable capacitor 7 is operated by driving the motor 10. Thus, the output impedance Z O is the load impedance Z L
The automatic control is performed so as to match with.
【００１２】而して、導子６，６を装着し直すために１
個の導子６は身体に着けたまま他の導子６を片手で動か
そうとする場合や、一対の導子６，６を夫々の手に把持
して動かそうとする場合は、負荷インピーダンスＺL が
大きく変動して整合状態から逸脱する。この時、前記制
御部９は整合状態に復帰するために上述したような動作
を行うのであるが、同時に該制御部９と前記高周波発生
装置２との間に設けられているスイッチング回路１１を
操作して、前記高周波発生装置２のデューティ比を約１
０％程度の安全領域にまで低下させる。Then, to reattach the conductors 6 and 6, 1
If one conductor 6 is to be moved with one hand while it is still worn on the body, or if a pair of conductors 6 and 6 are to be grasped and moved, the load impedance Z L fluctuates greatly and deviates from the matching state. At this time, the control unit 9 performs the above-described operation in order to return to the matching state. At the same time, the switching circuit 11 provided between the control unit 9 and the high frequency generator 2 is operated. Then, the duty ratio of the high frequency generator 2 is set to about 1
Reduce to a safe area of about 0%.
【００１３】図２はかかるスイッチング動作の様子を図
示した解説図であり、同図において時刻ｔ1 が整合状態
から逸脱した時点である。図に示す如く、時刻ｔ1 より
過去においてはインピーダンス整合がとれているためス
イッチング動作は行われず、デューティ１００％の状態
になっているが、整合状態を逸脱した瞬間（時刻
ｔ1）、前記スイッチング回路１１が作動してデューテ
ィ１０％程度になり、次に整合がとれる時刻ｔ2 までの
間そのデューティ比が維持される。時刻ｔ2 は患者が誤
って導子６を把持した手を身体に点接触させる等の動作
により、負荷インピーダンスＺL の変動が停止してイン
ピーダンス整合がとれた時点を示す。この時、該点接触
した部位に高周波温熱治療器１のエネルギーが集束して
しまうことになるが、デューティ比は安全領域にあるの
で患者が感知する間もなく瞬間的に火傷してしまうこと
はない。FIG. 2 is an explanatory diagram illustrating the state of such switching operation, which is the time point at which time t 1 deviates from the matching state. As shown in the figure, in the past from time t 1 , impedance matching has been achieved, so that the switching operation is not performed and the duty is 100%. However, at the moment when the matching state is deviated (time t 1 ), the switching is performed. The circuit 11 operates and the duty becomes about 10%, and the duty ratio is maintained until the time t 2 when the next matching is achieved. Time t 2 indicates a time point when the impedance of the load impedance Z L is stopped and the impedance matching is achieved due to an operation such as the patient erroneously holding the conductor 6 and making a point contact with the body. At this time, the energy of the high-frequency thermotherapy device 1 will be focused on the point-contacted portion, but since the duty ratio is in the safe region, it will not be momentarily burned without being detected by the patient.
【００１４】而して、インピーダンス整合がとれると前
記制御部９は、前記スイッチング回路１１のスイッチン
グ動作を徐々にON状態が長くなるように操作することに
よって、高周波発生装置２のデューティ比を徐々に上げ
ていく。そして、時刻ｔ2 から約５秒経過した時刻ｔ3
においてデューティ１００％に達する。斯くして、患者
はこの約５秒の間に前記点接触部位が熱くなろうとして
いることを感知することができ、反射的に手を離す等し
て火傷を回避することができるのである。When impedance matching is achieved, the control unit 9 operates the switching operation of the switching circuit 11 so that the ON state gradually becomes longer, thereby gradually increasing the duty ratio of the high frequency generator 2. Raise it. Then, time t 3 from the time t 2 has elapsed about 5 seconds
At, the duty reaches 100%. Thus, the patient can sense that the point contact site is about to become hot in about 5 seconds, and can reflexively release the hand to avoid a burn.
【００１５】尚、本実施例は自動制御によりインピーダ
ンス整合を行う高周波温熱治療器１について説明した
が、手動式の場合においてもスイッチング回路と該スイ
ッチング回路を操作する制御部を設けることにより、同
様にして不慮の火傷を防止することができる。また、本
実施例では、モータ１０にて可変コンデンサ７の回転角
度を変えることによりインピーダンス整合を行なってい
るが、図３に図示する如く、固定コンデンサ１２，１２
…をリレー等のスイッチ１３，１３…にて切換えること
によりインピーダンス整合を行なっても良い。更に、本
発明は、本発明の精神を逸脱しない限り種々の改変を為
すことができ、そして、本発明が該改変されたものに及
ぶことは当然である。In this embodiment, the high-frequency thermotherapy device 1 which performs impedance matching by automatic control has been described. However, even in the case of a manual type, a switching circuit and a control section for operating the switching circuit are provided to make the same. It is possible to prevent accidental burns. Further, in this embodiment, impedance matching is performed by changing the rotation angle of the variable capacitor 7 by the motor 10, but as shown in FIG.
Impedance matching may be performed by switching ... With switches 13 such as a relay. Further, the present invention can be variously modified without departing from the spirit of the present invention, and it goes without saying that the present invention covers the modifications.
【００１６】[0016]
【発明の効果】本発明は上記一実施例にて詳述した如
く、整合動作中は高周波発生手段のデューティ比を安全
領域まで落とし、整合がとれた後は所定時間かけて徐々
にデューティ比を１００％まで上げていくように構成さ
れている。従って、不注意により導子を把持した手を身
体に点接触させたために該点接触部位に高周波温熱治療
器のエネルギーが集束したような場合であっても、瞬間
的に火傷するようなことはなく、患者が熱さを感知した
時点で反射的に手を離す等すれば火傷を回避することが
できる。斯くして、高周波温熱治療器の安全性が向上す
る。As described in detail in the above embodiment, the present invention lowers the duty ratio of the high frequency generating means to the safe region during the matching operation, and gradually reduces the duty ratio over a predetermined time after the matching is achieved. It is configured to increase to 100%. Therefore, even if the energy of the high-frequency thermotherapy device is focused on the point contact site due to inadvertent point contact of the hand holding the conductor with the body, there is no possibility of instantaneous burns. Instead, the burn can be avoided if the patient reflexively releases the hand when the heat is sensed by the patient. Thus, the safety of the high frequency thermotherapy device is improved.
【図１】本発明の一実施例を示し、その構成図。FIG. 1 is a configuration diagram showing an embodiment of the present invention.
【図２】整合状態に対応したスイッチング動作およびデ
ューティ比の様子を示す解説図。FIG. 2 is an explanatory diagram showing a state of a switching operation and a duty ratio corresponding to a matching state.
【図３】整合方法の他の実施例を示す回路図。FIG. 3 is a circuit diagram showing another embodiment of a matching method.
１ 高周波温熱治療器 ２ 高周波発生装置 ４ 整合回路 ６ 導子 ７ 可変コンデンサ ８ 電流検出部 ９ 制御部 １０ モータ １１ スイッチング回路 ＺO 出力インピーダンス ＺL 負荷インピーダンス ｔ1 整合状態から外れた時刻 ｔ2 次に整合がとれた時刻 ｔ3 デューティ１００％になった時刻1 high-frequency thermotherapy device 2 high-frequency generator 4 matching circuit 6 conductor 7 variable capacitor 8 current detector 9 controller 10 motor 11 switching circuit Z O output impedance Z L load impedance t 1 time out of matching state t 2 next Matching time t 3 Time when the duty becomes 100%
Claims (1)
合手段を設け、該整合手段によって出力インピーダンス
を前記一対の導子間の負荷インピーダンスに整合させる
ように形成された温熱治療器において、高周波発生手段
の出力をスイッチング制御する制御手段を設け、整合動
作中は該制御手段により、前記高周波発生手段のデュー
ティ比が安全領域に入るようにスイッチング制御すると
ともに、整合動作終了後は該制御手段により、整合動作
終了後所定時間中に前記デューティ比を、前記安全領域
から増大させるようにスイッチング制御することを特徴
とする温熱治療器。1. A thermotherapy device which is provided with matching means between the high-frequency generating means and the pair of conductors, and is configured to match the output impedance with the load impedance between the pair of conductors by the matching means. A control means for switching control of the output of the high-frequency generating means is provided, and during the matching operation, the control means performs switching control so that the duty ratio of the high-frequency generating means is in a safe region, and after the matching operation is completed, the control is performed. The hyperthermia treatment device is characterized in that switching control is performed by the means so as to increase the duty ratio from the safety region within a predetermined time after completion of the matching operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11096995A JP3425641B2 (en) | 1995-05-09 | 1995-05-09 | Heat treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11096995A JP3425641B2 (en) | 1995-05-09 | 1995-05-09 | Heat treatment device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08299472A true JPH08299472A (en) | 1996-11-19 |
| JP3425641B2 JP3425641B2 (en) | 2003-07-14 |
Family
ID=14549104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11096995A Expired - Lifetime JP3425641B2 (en) | 1995-05-09 | 1995-05-09 | Heat treatment device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3425641B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018016929A1 (en) * | 2016-07-22 | 2018-01-25 | 주식회사 루트로닉 | Therapeutic rf energy transmitter and method for controlling same |
-
1995
- 1995-05-09 JP JP11096995A patent/JP3425641B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018016929A1 (en) * | 2016-07-22 | 2018-01-25 | 주식회사 루트로닉 | Therapeutic rf energy transmitter and method for controlling same |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3425641B2 (en) | 2003-07-14 |
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