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JP2005185657A - Surgical treatment instrument - Google Patents

Surgical treatment instrument
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JP2005185657A
JP2005185657AJP2003432951AJP2003432951AJP2005185657AJP 2005185657 AJP2005185657 AJP 2005185657AJP 2003432951 AJP2003432951 AJP 2003432951AJP 2003432951 AJP2003432951 AJP 2003432951AJP 2005185657 AJP2005185657 AJP 2005185657A
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tissue
surgical treatment
treatment instrument
heat generating
jaws
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Koji Iida
浩司 飯田
Kazunori Taniguchi
一徳 谷口
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Olympus Corp
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Olympus Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a surgical treatment instrument with high treatment efficiency, having a means for discriminating a coagulation state with excellent responsiveness/precision. <P>SOLUTION: The instrument comprises: a pair of jaws 10, 11 to be opened/closed; a heat generation blade 18 as a heat generating means which is arranged in at least one of the jaws 10, 11; a power source 3 for controlling the heat generation blade 18; and a light reception sensing part 27 as a pressure detecting means for detecting pressure on tissue in at least one of the jaws 10, 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

Translated fromJapanese

この発明は、開閉可能な一対のジョーの間で生体組織を把持して生体組織を加熱し、生体組織の凝固などの加熱処置を行う外科用処置具に関する。  The present invention relates to a surgical treatment instrument that heats a living tissue by gripping the living tissue between a pair of openable and closable jaws and performs a heating treatment such as coagulation of the living tissue.

生体の体腔内の生体組織を把持して加熱し、生体組織を凝固処置する凝固切開システムが知られている(例えば、特許文献1参照。)。これは、挿入部の先端部に開閉自在な一対のジョーを有する外科用処置具である。このジョーの一方に発熱板が設けられ、他方のジョーに発熱板を受ける受け部材が設けられている。そして、発熱板の発熱温度を生体組織を凝固可能な温度に設定して凝固できるようになっている。  A coagulation / incision system is known that grips and heats a living tissue in a body cavity of a living body to coagulate the living tissue (see, for example, Patent Document 1). This is a surgical treatment instrument having a pair of jaws that can be freely opened and closed at the distal end of the insertion portion. One of the jaws is provided with a heat generating plate, and the other jaw is provided with a receiving member for receiving the heat generating plate. Then, the heat generation temperature of the heat generating plate is set to a temperature at which the living tissue can be coagulated, so that it can be coagulated.

また、前述した外科用処置具に電力を供給する処置具用電源が知られている(特許文献2参照。)。これは、凝固対象組織の大きさ、厚さなどによって凝固結果に差が生じるという問題を解消するために、温度検出手段を設け、温度検出手段によって検出された温度が予め設定された値に達するまでの供給電力量または出力時間を電力制御するようにしたものである。
特許第3349139号公報特開2001−269352号公報
Also, a power supply for a treatment tool that supplies power to the above-described surgical treatment tool is known (see Patent Document 2). This is because temperature detection means is provided in order to eliminate the problem of differences in coagulation results depending on the size and thickness of the tissue to be coagulated, and the temperature detected by the temperature detection means reaches a preset value. The amount of power supplied or the output time is controlled.
Japanese Patent No. 3349139 JP 2001-269352 A

しかしながら、特許文献1では、組織の凝固状態を判別する手段は考慮されておらず、凝固状態に応じた最適な制御ができない点から、処置効率に改善に余地があった。  However, inPatent Document 1, a means for determining the coagulation state of the tissue is not considered, and there is room for improvement in treatment efficiency because optimal control according to the coagulation state cannot be performed.

特許文献2では、凝固結果を一定にするため、発熱手段の温度に基づいて制御を実施しているが、組織と発熱手段の間に温度差が発生するため、制御の精度に改善の余地があった。  InPatent Document 2, control is performed based on the temperature of the heating means in order to make the solidification result constant. However, since a temperature difference occurs between the tissue and the heating means, there is room for improvement in control accuracy. there were.

ここで、直接的に組織の温度を測定するには熱電対やサーミスタを用いるのが一般的であるが、組織は水分を含むため、熱電対などを耐久性を高めるために水密構造にする必要があり、その結果として測温の応答性、精度が低下するという問題があった。  Here, it is common to use a thermocouple or thermistor to directly measure the temperature of the tissue, but since the tissue contains moisture, it is necessary to make the thermocouple etc. watertight to enhance durability As a result, there is a problem that the responsiveness and accuracy of temperature measurement are lowered.

また、組織の電気抵抗の変化により組織の水分含有量を把握して、凝固状態を判別する方法もあるが、組織の電気抵抗の測定には高周波電源が必要となる。  In addition, there is a method for determining the coagulation state by grasping the moisture content of the tissue based on the change in the electrical resistance of the tissue, but a high frequency power source is required for measuring the electrical resistance of the tissue.

この発明は、前記事情に着目してなされたもので、その目的とするところは、応答性・精度がすぐれた凝固状態を判別する手段を有し、処置効率の高い外科用処置具を提供することにある。  The present invention has been made paying attention to the above circumstances, and an object of the present invention is to provide a surgical treatment instrument having a means for discriminating a coagulation state having excellent responsiveness and accuracy and having high treatment efficiency. There is.

この発明は、前記目的を達成するために、一対の開閉するジョーと、前記ジョーの少なくとも一方に設けられた発熱手段と、前記発熱手段を制御する電源とからなる外科用処置具において、前記ジョーの少なくとも一方に組織の圧力を検知する圧力検知手段を設けたことを特徴とする。  In order to achieve the above object, the present invention provides a surgical treatment instrument comprising a pair of jaws that open and close, a heat generating means provided on at least one of the jaws, and a power source that controls the heat generating means. At least one of them is provided with a pressure detection means for detecting the pressure of the tissue.

請求項2は、請求項1の前記圧力検知手段は、歪ゲージであることを特徴とする。  A second aspect of the present invention is characterized in that the pressure detecting means of the first aspect is a strain gauge.

請求項3は、請求項1の前記圧力検知手段は、組織圧力情報を出力し、この出力信号に基づいて前記電源を制御することを特徴とする。  A third aspect of the present invention is characterized in that the pressure detecting means of the first aspect outputs tissue pressure information and controls the power source based on the output signal.

この発明によれば、凝固状態判別の応答性・精度が優れ、高い処置効率を得ることができるという効果がある。  According to the present invention, there is an effect that the responsiveness / accuracy of determining the coagulation state is excellent and high treatment efficiency can be obtained.

以下、この発明の各実施の形態を図面に基づいて説明する。  Embodiments of the present invention will be described below with reference to the drawings.

図1〜図3は第1の実施形態を示し、図1は外科用処置具システムの全体の斜視図、図2(a)は外科用処置具の先端処置部の上面図、(b)は先端処置部の側面図、(c)は(a)のX−X線に沿う断面図、(d)は(a)のY−Y線に沿う断面図、(e)は(d)のZ−Z線に沿う断面図である。図3(a)は電源の回路図、(b)は制御の流れを示したフローチャート図である。  1 to 3 show a first embodiment, FIG. 1 is an overall perspective view of a surgical treatment instrument system, FIG. 2A is a top view of a distal treatment section of the surgical treatment instrument, and FIG. Side view of the distal treatment section, (c) is a sectional view taken along line XX in (a), (d) is a sectional view taken along line YY in (a), and (e) is Z in (d). It is sectional drawing which follows the -Z line. FIG. 3A is a circuit diagram of a power supply, and FIG. 3B is a flowchart showing a control flow.

図1に示すように、外科用処置具システム1は、外科用処置具2と電源3、両者を接続するケーブル4及び電源3の制御を行うフットスイッチ5とから構成されている。外科用処置具2は、金属材料からなる第1の柄本体6と第2の柄本体7とを枢支軸8によって回動自在に軸支することにより構成されている。そして、第1の柄本体6と第2の柄本体7の先端部に設けられた第1と第2のジョー10、11が互いに開閉するようになっている。  As shown in FIG. 1, the surgicaltreatment instrument system 1 includes asurgical treatment instrument 2 and apower source 3, acable 4 that connects both, and a foot switch 5 that controls thepower source 3. Thesurgical treatment instrument 2 is configured by pivotally supporting afirst handle body 6 and a second handle body 7 made of a metal material by a pivot shaft 8 so as to be rotatable. And the 1st and2nd jaws 10 and 11 provided in the front-end | tip part of the 1st patternmain body 6 and the 2nd pattern main body 7 open and close mutually.

第1の柄本体6の先端部に設けられた第1のジョー10は、図2(a)に示すように、先端部が細く、かつ湾曲しており、その下部には処置部12が設けられている。図1に示すように、第1の柄本体6の他端部には使用者が指で操作する指掛け部13及び第2の柄本体7との互いの位置を固定するラチェット手段14が設けられている。さらに、指掛け部13の一部にはケーブル4が接続されるコネクタ15が設けられている。  As shown in FIG. 2A, thefirst jaw 10 provided at the distal end portion of thefirst handle body 6 is thin and curved at the distal end portion, and atreatment portion 12 is provided at the lower portion thereof. It has been. As shown in FIG. 1, the other end of thefirst handle body 6 is provided with a ratchet means 14 for fixing the position of thefinger handle portion 13 operated by the user with a finger and the second handle body 7. ing. Further, aconnector 15 to which thecable 4 is connected is provided on a part of thefinger hook 13.

また、第2の柄本体7の基端部には指掛け部16及びラチェット手段17が設けられている。ラチェット手段14,17は一般的な手術用鉗子にあるものと同様に互いに係合するようになっている。  Further, afinger hooking portion 16 and a ratchet means 17 are provided at the proximal end portion of the second handle body 7. The ratchet means 14 and 17 are adapted to engage with each other in the same manner as in general surgical forceps.

さらに、図2(b),(c)に示すように、第1のジョー10には処置部12として発熱する発熱手段としての発熱ブレード18が断熱枠19によって設けられている。発熱ブレード18は薄膜抵抗あるいは厚膜抵抗からなる発熱パターン20を側面または上面にもつ発熱素子からなり、その素材は銅、モリブデン、タングステン、銅モリブデンなどの熱伝導性が良好な金属である。発熱パターン20には給電のための導線21が接続されている。なお、本実施形態では発熱パターン20は略U字型の1系統であるが、温度分布を良好にするため、電気的に独立した2系統としてもよい。  Further, as shown in FIGS. 2B and 2C, thefirst jaw 10 is provided with a heat generatingblade 18 as a heat generating means for generating heat as thetreatment portion 12 by aheat insulating frame 19. The heat generatingblade 18 is formed of a heat generating element having aheat generating pattern 20 made of a thin film resistor or a thick film resistor on a side surface or an upper surface, and the material thereof is a metal having good heat conductivity such as copper, molybdenum, tungsten, copper molybdenum. Aconductive wire 21 for power feeding is connected to theheat generation pattern 20. In the present embodiment, theheat generation pattern 20 is a substantially U-shaped one system, but may be two electrically independent systems in order to improve the temperature distribution.

また、図2(e)に示すように、発熱ブレード18の断面形状は下端18a’が処置に適した鋭角の略三角形状をしている。また、断熱枠19の断面形状は略逆U字型をなし、発熱ブレード18の上部を覆っている。この断熱枠19は発熱ブレード18と第1のジョー10との断熱の役目を果たしている。この断熱枠19の材質は熱伝導率の低いテフロン(登録商標)(テトラフルオロエチレン)などのフッ素樹脂や、ポリイミドなどの耐熱樹脂がよい。  Further, as shown in FIG. 2E, the heat generatingblade 18 has a cross-sectional shape of a substantially triangular shape with alower end 18a 'having an acute angle suitable for treatment. The cross-sectional shape of theheat insulating frame 19 is substantially inverted U-shaped and covers the upper part of the heat generatingblade 18. Theheat insulating frame 19 plays a role of heat insulation between the heat generatingblade 18 and thefirst jaw 10. The material of theheat insulating frame 19 is preferably a fluororesin such as Teflon (registered trademark) (tetrafluoroethylene) having a low thermal conductivity, or a heat resistant resin such as polyimide.

また、図2(d),(e)に示すように、第1のジョー10に設けられた断熱枠19の長手方向には発熱ブレード18に隣接して白色LEDからなる光源22および集光部23が複数設けられている。光源22の各々には給電のための導線24及び図示しないフレキシブル基板が接続されている。なお、光源22及び集光部23は透明なガラスや樹脂材料の内部に水密を保持した状態で一体成型されている。  Further, as shown in FIGS. 2D and 2E, in the longitudinal direction of theheat insulating frame 19 provided on thefirst jaw 10, alight source 22 made of white LED and a light collecting unit are adjacent to theheating blade 18. A plurality of 23 are provided. Each of thelight sources 22 is connected with a conductingwire 24 for power feeding and a flexible substrate (not shown). In addition, thelight source 22 and thelight condensing part 23 are integrally molded in a state where watertightness is maintained inside a transparent glass or resin material.

また、処置部12と対向する第2のジョー11の内側面25には柔軟部材26が設けられている。この柔軟部材26は第1のジョー10と第2のジョー11とが閉じたときに、発熱ブレード18と柔軟部材26が隙間無く密着することで処置効率を高めるものである。柔軟部材26の材質としては、柔軟性を有するとともに熱伝導率の低いゴム(シリコンゴム、フッ素ゴムなど)やテトラフルオロエチレンなどの樹脂がよい。  Further, aflexible member 26 is provided on theinner side surface 25 of thesecond jaw 11 facing thetreatment portion 12. When thefirst jaw 10 and thesecond jaw 11 are closed, theflexible member 26 improves the treatment efficiency by closely contacting the heat generatingblade 18 and theflexible member 26 with no gap. As a material of theflexible member 26, a resin having flexibility and low thermal conductivity (silicon rubber, fluorine rubber, etc.) or a resin such as tetrafluoroethylene is preferable.

また、柔軟部材26に隣接して光源22と対向する位置に組織量判別手段としての受光感知部27が複数設けられている。受光感知部27にはフォトダイオード(光起電力素子)、光導電素子など、受光量に応じて電気的な変化を生じる素子が透明なガラスや樹脂の中に、水密を保持した状態で一体成型されている。各々の受光感知部27には電源3と導線28、図示しないフレキシブル基板及びケーブル4によって電気的に接続されている。  In addition, a plurality oflight receiving detectors 27 serving as tissue amount determining means are provided at positions facing thelight source 22 adjacent to theflexible member 26. In thelight receiving sensor 27, a device such as a photodiode (photovoltaic device) or a photoconductive device, which electrically changes depending on the amount of received light, is integrally molded in a transparent glass or resin while maintaining watertightness. Has been. Each light-receivingsensing unit 27 is electrically connected to thepower source 3 and theconductive wire 28, a flexible substrate (not shown) and thecable 4.

図3(a)に示す電源3について説明すると、商用電源と接続される電源部29は出力部30を介してケーブル4に接続されている。出力部30はフットスイッチ5、ケーブル4の一部と接続される制御部31に接続されている。また、制御部31は外科用処置具2への出力を設定可能な設定手段32に接続されている。  Thepower supply 3 shown in FIG. 3A will be described. Thepower supply unit 29 connected to the commercial power supply is connected to thecable 4 via theoutput unit 30. Theoutput unit 30 is connected to acontrol unit 31 connected to the foot switch 5 and a part of thecable 4. Thecontrol unit 31 is connected to setting means 32 that can set the output to thesurgical treatment instrument 2.

次に、第1の実施形態の作用を図3(b)に基づいて説明する。第1の柄本体6と第2の柄本体7を開閉操作して処置するための組織を発熱ブレード18と柔軟部材26の間で把持する。フットスイッチ5を操作する(ステップS1)と、まず光源22が点灯する(ステップS2)。その光を受光感知部27で感知して把持した組織の量を測定する(ステップS3)。すなわち、組織があると光源22の光を遮り、受光感知部27で光を感知できないため、電源3は組織の有無を判別でき、また複数の受光感知部27の感知状態を把握することにより、組織の量を情報として認知できる。この情報に基づき、制御部31は組織の量に応じた最適な制御や設定条件(素子への印加電圧や設定温度など)に設定を行う(ステップS4)。  Next, the effect | action of 1st Embodiment is demonstrated based on FIG.3 (b). A tissue for treatment by opening / closing thefirst handle body 6 and the second handle body 7 is gripped between theheat generating blade 18 and theflexible member 26. When the foot switch 5 is operated (step S1), thelight source 22 is first turned on (step S2). The amount of tissue grasped by detecting the light by thelight receiving sensor 27 is measured (step S3). That is, if there is a tissue, the light from thelight source 22 is blocked, and the light receivingsensing unit 27 cannot sense the light. Therefore, thepower source 3 can determine the presence or absence of the tissue, and by grasping the sensing state of the plurality of light receivingsensing units 27, The amount of organization can be recognized as information. Based on this information, thecontrol unit 31 sets optimal control and setting conditions (applied voltage to the element, set temperature, etc.) according to the amount of tissue (step S4).

続けて、発熱パターン20に通電して発熱ブレード18を発熱させる。使用者が発熱開始の遅延を感じないように、以上の一連の動作は、なるべく早く実施されることが望ましい。  Subsequently, theheating pattern 20 is energized to cause theheating blade 18 to generate heat. It is desirable that the above series of operations be performed as soon as possible so that the user does not feel a delay in the start of heat generation.

次に発熱処置によって、組織が凝固・加熱変性されると、組織の厚みは薄くなる。これにより、組織の光透過量が上がり(組織に加えられる圧力によっては半透明になる)、受光感知部27で凝固状態を受光量の変化として認知できる(ステップS5)。受光量の変化(すなわち組織の凝固状態)に応じて、電源3の制御や設定を変更可能である(ステップS6)。例えば、凝固状態の変化が遅い場合(発熱時間との比較が必要)は設定温度を上げたり、逆に速い場合は途中で設定温度を下げるなどである。また、所定の受光量を超えたときに、制御部31および出力部30が凝固が完了(ステップS7)したと判断して、通電・発熱を止めてもよい(ステップS8)。  Next, when the tissue is coagulated and heat-denatured by an exothermic treatment, the thickness of the tissue becomes thin. As a result, the light transmission amount of the tissue increases (becomes translucent depending on the pressure applied to the tissue), and the coagulation state can be recognized as a change in the light reception amount by the light receiving sensor 27 (step S5). The control and setting of thepower source 3 can be changed according to the change in the amount of received light (ie, the coagulation state of the tissue) (step S6). For example, when the change in the solidification state is slow (comparison with the heat generation time is necessary), the set temperature is raised, and conversely, when it is fast, the set temperature is lowered halfway. When the predetermined amount of received light is exceeded, thecontroller 31 and theoutput unit 30 may determine that the coagulation has been completed (step S7), and the energization / heat generation may be stopped (step S8).

前記実施形態によれば、組織の凝固状態を直接的に判別するため、凝固状態判別の応答性・精度が優れ、判別の応答性・高精度と水密構造の両立が容易である。これにより、高い処置効率を得ることができる。  According to the embodiment, since the coagulation state of the tissue is directly discriminated, the responsiveness / accuracy of the coagulation state discrimination is excellent, and the responsiveness / high accuracy of discrimination and the watertight structure are easy. Thereby, high treatment efficiency can be obtained.

なお、外科用処置具2としては、図4の変形例に示すように、内視鏡下手術に適した細長い挿入部33を有する外科用処置具34を構成してもよい。なお、処置部12の構成は第1の実施形態と同様であり、説明を省略する。  In addition, as thesurgical treatment instrument 2, as shown in the modification of FIG. 4, asurgical treatment instrument 34 having an elongatedinsertion portion 33 suitable for endoscopic surgery may be configured. The configuration of thetreatment unit 12 is the same as that of the first embodiment, and a description thereof is omitted.

図5及び図6は第2の実施形態を示す。図5(a)は組織凝固前の状態を示し、図2(a)のX−X線に対応する断面図、図5(b)は組織凝固後の状態を示し、図2(a)のX−X線に沿う断面図、図6は制御の流れを示したフローチャート図である。  5 and 6 show a second embodiment. 5A shows a state before tissue coagulation, a cross-sectional view corresponding to line XX in FIG. 2A, FIG. 5B shows a state after tissue coagulation, and FIG. FIG. 6 is a cross-sectional view taken along line XX, and FIG. 6 is a flowchart showing a control flow.

なお、本実施形態において、第1の実施形態と共通する構成部分については、以下、同一符号を付して、その説明を省略する。  In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

図5(a)に示すように、第1のジョー10に設けられた処置部12と対向する第2のジョー11の内側面25には柔軟部材35が設けられている。この柔軟部材35によって第1のジョー10と第2のジョー11とが閉じたとき、発熱ブレード18と柔軟部材35が隙間無く密着することで処置効率を高めることができる。柔軟部材35の材質としては、柔軟性を有するとともに、熱伝導率の低いゴム(シリコンゴム、フッ素ゴム)やテトラフルオロエチレンなどの樹脂がよい。  As shown in FIG. 5A, aflexible member 35 is provided on theinner side surface 25 of thesecond jaw 11 facing thetreatment portion 12 provided on thefirst jaw 10. When thefirst jaw 10 and thesecond jaw 11 are closed by theflexible member 35, theheat generating blade 18 and theflexible member 35 are in close contact with each other without any gap, so that the treatment efficiency can be improved. As a material of theflexible member 35, a resin having flexibility and low thermal conductivity (silicon rubber, fluorine rubber) or tetrafluoroethylene is preferable.

さらに、柔軟部材35の組織36と接触する上端部には、組織の圧力を検知する圧力検知手段としての圧力センサ37が設けられている。この圧力センサ37によって一定力量で組織36を把持したときに、その把持組織36の体積変化による圧力変動を検知することができる。圧力センサ37としては小型化できる点から歪ゲーシが適当である。圧力センサ37には図示しない導線、ケーブル4によって電源3に電気的に接続されている。  Further, apressure sensor 37 as a pressure detecting means for detecting the tissue pressure is provided at the upper end portion of theflexible member 35 that contacts thetissue 36. When thetissue 36 is grasped with a certain amount of force by thepressure sensor 37, a pressure fluctuation due to a volume change of the graspedtissue 36 can be detected. As thepressure sensor 37, strain gage is suitable from the viewpoint of miniaturization. Thepressure sensor 37 is electrically connected to thepower source 3 by a lead wire and a cable 4 (not shown).

次に、第2の実施形態の作用を図5(a),(b)及び図6に基づいて説明する。図5(a)に示すように、第1の柄本体6と第2の柄本体7を操作して処置するための組織36を発熱ブレード18と圧力センサ37の間で把持する。このとき、ラチェット手段14,17を係合させて把持力を一定に保つことが望ましい。フットスイッチ5を操作すると(ステップS1)、まず圧力センサ37が起動し(ステップS2)、組織36を把持した部分の圧力値が検出される。この圧力値の情報に基づき、制御部31は、組織36の量を判別し(ステップS3)、組織36の量に応じた最適な制御や設定条件(素子への印加電圧や設定温度など)に設定を行う(ステップS4)。  Next, the operation of the second embodiment will be described based on FIGS. 5 (a), 5 (b) and FIG. As shown in FIG. 5A, thetissue 36 for treatment by operating thefirst handle body 6 and the second handle body 7 is gripped between theheating blade 18 and thepressure sensor 37. At this time, it is desirable to keep the gripping force constant by engaging the ratchet means 14 and 17. When the foot switch 5 is operated (step S1), first, thepressure sensor 37 is activated (step S2), and the pressure value of the portion gripping thetissue 36 is detected. Based on the pressure value information, thecontrol unit 31 determines the amount of the tissue 36 (step S3), and performs optimum control and setting conditions (such as an applied voltage to the element and a set temperature) according to the amount of thetissue 36. Setting is performed (step S4).

続けて、発熱パターン20に通電して発熱ブレード18を発熱させる。使用者が発熱開始の遅延を感じないように、以上の一連の動作はなるべく速く実施されることが望ましい。  Subsequently, theheating pattern 20 is energized to cause theheating blade 18 to generate heat. It is desirable that the above series of operations be performed as quickly as possible so that the user does not feel a delay in starting heat generation.

次に発熱処置によって、組織36が凝固・加熱変性されると(ステップS5)、図5(b)に示すように組織36の厚みは薄くなる。これにより圧力センサ37が検知する圧力値は、組織凝固前より低くなる。圧力値の変化(すなわち組織36の凝固状態)に応じて電源3の制御や設定を変更可能である(ステップS6)。  Next, when thetissue 36 is solidified and heat-denatured by an exothermic treatment (step S5), the thickness of thetissue 36 is reduced as shown in FIG. Thereby, the pressure value detected by thepressure sensor 37 becomes lower than that before the tissue coagulation. The control and setting of thepower supply 3 can be changed according to the change in the pressure value (that is, the solidification state of the tissue 36) (step S6).

例えば、凝固状態の変化が遅い場合(発熱時間との比較が必要)は設定温度を上げたり、逆に速い場合は途中で設定温度を下げるなどである。また、圧力値の低下が所定量を超えたときに、制御部31および出力部30の連携により凝固が完了したと判断して、通電・発熱を止めてもよい(ステップS7)。  For example, when the change in the solidification state is slow (comparison with the heat generation time is necessary), the set temperature is raised, and conversely, when it is fast, the set temperature is lowered halfway. Further, when the decrease in the pressure value exceeds a predetermined amount, it may be determined that coagulation has been completed by cooperation of thecontrol unit 31 and theoutput unit 30, and the energization / heat generation may be stopped (step S7).

本実施形態によれば、組織の凝固状態を直接的に判別するため、凝固状態判別の応答性・精度が優れている。これにより、高い処置効率を得ることができる。  According to this embodiment, since the coagulation state of the tissue is directly discriminated, the responsiveness / accuracy of the coagulation state discrimination is excellent. Thereby, high treatment efficiency can be obtained.

図7及び図8は第3の実施形態を示す。図7は組織凝固後の状態を示し、図2(a)のX−X線に対応する断面図、図8は制御の流れを示したフローチャート図である。  7 and 8 show a third embodiment. FIG. 7 shows a state after tissue coagulation, a cross-sectional view corresponding to line XX in FIG. 2A, and FIG. 8 is a flowchart showing a control flow.

なお、本実施形態において、第1の実施形態と共通する構成部分については、以下、同一符号を付して、その説明を省略する。  In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

図7に示すように、処置部12としての発熱する発熱ブレード18が断熱枠19によって第1のジョー10と接続されている。発熱ブレード18は薄膜抵抗あるいは厚膜抵抗からなる第1発熱パターン18aと第2発熱パターン18bの2系統を側面または上面にもつ発熱素子からなり、その素材は、銅、モリブデン、タングステン、銅モリブデンなどの熱伝導性が良好な金属である。第1発熱パターン18a、第2発熱パターン18bには、給電のための導線21a,21bがそれぞれ接続されている。  As shown in FIG. 7, aheat generating blade 18 that generates heat as thetreatment portion 12 is connected to thefirst jaw 10 by aheat insulating frame 19. Theheat generating blade 18 is composed of a heat generating element having two systems of a firstheat generating pattern 18a and a secondheat generating pattern 18b each having a thin film resistor or a thick film resistor on a side surface or an upper surface, and the material thereof is copper, molybdenum, tungsten, copper molybdenum or the like. It is a metal with good thermal conductivity.Conductive wires 21a and 21b for power feeding are connected to the firstheat generation pattern 18a and the secondheat generation pattern 18b, respectively.

また、処置部12と対向する第2のジョー11の内側面25には柔軟部材35が設けられている。この柔軟部材35は第1のジョー10と第2のジョー11とが閉じたとき、発熱ブレード18と柔軟部材35が隙間無く密着することで処置効率を高めることができる。柔軟部材35の材質としては、柔軟性を有するとともに、熱伝導率の低いゴム(シリコンゴム、フッ素ゴム)やテトラフルオロエチレンなどの樹脂がよい。  Further, aflexible member 35 is provided on theinner side surface 25 of thesecond jaw 11 facing thetreatment portion 12. When thefirst jaw 10 and thesecond jaw 11 are closed, theflexible member 35 can improve the treatment efficiency by closely contacting theheat generating blade 18 and theflexible member 35 with no gap. As a material of theflexible member 35, a resin having flexibility and low thermal conductivity (silicon rubber, fluorine rubber) or tetrafluoroethylene is preferable.

さらに、柔軟部材35の組織36と接触する上端部には、圧力センサ37が設けられている。この圧力センサ37によって組織36の把持位置を検出することができる。圧力センサ37としては、小型化できる点から歪ゲージが適当である。圧力センサ37には図示しない導線、ケーブル4によって電源3に電気的に接続されている。  Further, apressure sensor 37 is provided at the upper end portion of theflexible member 35 that comes into contact with thetissue 36. The pressure position of thetissue 36 can be detected by thepressure sensor 37. As thepressure sensor 37, a strain gauge is appropriate from the viewpoint of miniaturization. Thepressure sensor 37 is electrically connected to thepower source 3 by a lead wire and a cable 4 (not shown).

次に、第3の実施形態の作用を図7及び図8に基づいて説明する。図7に示すように、第1の柄本体6と第2の柄本体7を操作して処置するための組織36を発熱ブレード18と圧力センサ37の間で把持する。フットスイッチ5を操作すると(ステップS1)、まず圧力センサ37が起動(ステップS2)して組織36を把持した位置が検出される(ステップS3)。この組織36の把持位置情報に基づき、第2発熱パターン18bに電力を供給し、第1発熱パターン18aの電力供給を遮断する(ステップS4)。そして、第2発熱パターン18bによって組織36を加熱凝固が完了する(ステップS5)。このとき、制御部31および出力部30の連携により、組織36の把持位置によって例えば把持位置が第2発熱パターン18bの位置であるとしても第1発熱パターン18aに近い場合などには、第1発熱パターン18aにもある程度の電力供給を行う、などの制御をしてもよい。  Next, the effect | action of 3rd Embodiment is demonstrated based on FIG.7 and FIG.8. As shown in FIG. 7, thetissue 36 for treatment by operating thefirst handle body 6 and the second handle body 7 is gripped between theheat generating blade 18 and thepressure sensor 37. When the foot switch 5 is operated (step S1), first, thepressure sensor 37 is activated (step S2), and the position where thetissue 36 is grasped is detected (step S3). Based on the grip position information of thetissue 36, power is supplied to the secondheat generation pattern 18b, and the power supply of the firstheat generation pattern 18a is cut off (step S4). Then, thetissue 36 is heated and solidified by the secondheat generation pattern 18b (step S5). At this time, the cooperation between thecontrol unit 31 and theoutput unit 30 causes the first heat generation when the gripping position of thetissue 36 is close to the firstheat generation pattern 18a even if the gripping position is the position of the secondheat generation pattern 18b. Thepattern 18a may be controlled to supply a certain amount of power.

以上の制御によって、組織36を把持した位置に対して発熱ブレード18の適正な部分を発熱させる。使用者が発熱開始の遅延を感じないように、以上の一連の動作はなるべく速く実施されることが望ましい。  With the above control, an appropriate portion of theheat generating blade 18 is heated at the position where thetissue 36 is grasped. It is desirable that the above series of operations be performed as quickly as possible so that the user does not feel a delay in starting heat generation.

本実施形態によれば、組織の把持位置を特定し発熱ブレードを適正に発熱させるので、高い処置効率を得ることができる。  According to the present embodiment, since the grasping position of the tissue is specified and the heat generating blade is appropriately heated, high treatment efficiency can be obtained.

前述した各実施形態によれば、次の構成が得られる。  According to each embodiment mentioned above, the following composition is obtained.

(付記1)開閉する一対のジョーと、前記ジョーの少なくとも一方に設けられた発熱手段と、前記発熱手段を制御する電源とからなる外科用処置具において、前記ジョーの少なくとも一方に組織の圧力を検知する圧力検知手段を設け、前記電源は、前記圧力検知手段からの組織圧力情報から組織の凝固状態を検知したとき、前記発熱手段の発熱を終了させることを特徴とする外科用処置具。  (Appendix 1) In a surgical treatment instrument comprising a pair of jaws to be opened and closed, a heat generating means provided on at least one of the jaws, and a power source for controlling the heat generating means, tissue pressure is applied to at least one of the jaws. A surgical treatment tool comprising pressure detecting means for detecting, and the power supply ends heat generation of the heat generating means when detecting a coagulation state of tissue from tissue pressure information from the pressure detecting means.

(付記2)付記1において、前記圧力検知手段は、組織把持位置を検知し、電源が組織把持部分の発熱手段へ電力供給を行うことを特徴とする外科用処置具。  (Supplementary note 2) The surgical treatment instrument according tosupplementary note 1, wherein the pressure detecting means detects a tissue gripping position, and a power source supplies power to a heat generating means of a tissue gripping portion.

(付記3)付記1において、前記圧力検知手段は、組織把持位置を検知し、電源が、組織を把持していない部分への電力供給を抑えることを特徴とする外科用処置具。  (Supplementary note 3) The surgical treatment instrument according tosupplementary note 1, wherein the pressure detecting means detects a tissue grasping position, and a power source suppresses power supply to a portion not grasping the tissue.

(付記4)開閉する一対のジョーと、前記ジョーの少なくとも一方に設けられた発熱手段と、前記発熱手段の発熱を制御する電源とからなる外科用処置具において、前記ジョーの少なくとも一方に光源手段を有し、前記ジョーの少なくとも他方に組織の大きさと凝固状態を知るために、組織の光透過率を測定可能な光感知手段を設けたことを特徴とする外科用処置具。  (Supplementary note 4) In a surgical treatment instrument comprising a pair of jaws to be opened and closed, a heat generating means provided in at least one of the jaws, and a power source for controlling the heat generation of the heat generating means, a light source means is provided in at least one of the jaws And a light sensing means capable of measuring the light transmittance of the tissue in order to know the size and coagulation state of the tissue on at least the other jaw.

(付記5)付記4において、前記光感知手段は光感知素子であることを特徴とする外科用処置具。  (Supplementary note 5) The surgical treatment instrument according toSupplementary note 4, wherein the light sensing means is a light sensing element.

(付記6)付記4において、組織の光透過率の変化に応じて前記電源が発熱の制御を行うことを特徴とする外科用処置具。  (Supplementary note 6) The surgical treatment instrument according tosupplementary note 4, wherein the power source controls heat generation according to a change in light transmittance of the tissue.

(付記7)付記4において、組織の光透過率の変化に応じて前記電源が発熱を終了させることを特徴とする外科用処置具。  (Supplementary note 7) The surgical treatment instrument according tosupplementary note 4, wherein the power source terminates heat generation in response to a change in the light transmittance of the tissue.

この発明の第1の実施形態を示し、外科用処置具システムの全体の斜視図。1 is a perspective view of an entire surgical treatment instrument system according to a first embodiment of the present invention.同実施形態を示し、(a)は外科用処置具の先端処置部の上面図、(b)は先端処置部の側面図、(c)は(a)のX−X線に沿う断面図、(d)は(a)のY−Y線に沿う断面図、(e)は(d)のZ−Z線に沿う断面図。The same embodiment is shown, (a) is a top view of the distal treatment section of the surgical treatment instrument, (b) is a side view of the distal treatment section, (c) is a sectional view taken along line XX of (a), (D) is sectional drawing which follows the YY line of (a), (e) is sectional drawing which follows the ZZ line of (d).同実施形態を示し、(a)は電源の回路図、(b)は制御の流れを示したフローチャート図。The same embodiment is shown, (a) is a circuit diagram of a power supply, (b) is a flowchart showing the flow of control.同実施形態の変形例を示し、外科用処置具の側面図。The side view of the surgical treatment tool which shows the modification of the embodiment.この発明の第2の実施形態を示し、(a)は組織凝固前の状態を示し、図2(a)のX−X線に対応する断面図、(b)は組織凝固後の状態を示し、図2(a)のX−X線に沿う断面図。FIG. 2 shows a second embodiment of the present invention, where (a) shows a state before tissue coagulation, a cross-sectional view corresponding to line XX in FIG. 2 (a), and (b) shows a state after tissue coagulation. Sectional drawing which follows the XX line of Fig.2 (a).同実施形態の制御の流れを示したフローチャート図。The flowchart figure which showed the flow of control of the embodiment.この発明の第3の実施形態の組織凝固後の状態を示し、図2(a)のX−X線に対応する断面図。Sectional drawing which shows the state after the tissue coagulation | solidification of 3rd Embodiment of this invention, and respond | corresponds to the XX line of Fig.2 (a).同実施形態の制御の流れを示したフローチャート図。The flowchart figure which showed the flow of control of the embodiment.

符号の説明Explanation of symbols

2…外科用処置具、3…電源、10,11…ジョー、12…処置部、18…発熱ブレード(発熱手段)、27…受光感知部(圧力検知手段)2 ... Surgical instrument, 3 ... Power source, 10, 11 ... Jaw, 12 ... Treatment part, 18 ... Heat generation blade (heat generation means), 27 ... Light receiving detection part (pressure detection means)

Claims (3)

Translated fromJapanese
開閉する一対のジョーと、前記ジョーの少なくとも一方に設けられた発熱手段と、前記発熱手段を制御する電源とからなる外科用処置具において、
前記ジョーの少なくとも一方に組織の圧力を検知する圧力検知手段を設けたことを特徴とする外科用処置具。
In a surgical treatment instrument comprising a pair of jaws to be opened and closed, a heat generating means provided on at least one of the jaws, and a power source for controlling the heat generating means,
A surgical treatment instrument, wherein pressure detecting means for detecting tissue pressure is provided on at least one of the jaws.
前記圧力検知手段は、歪ゲージであることを特徴とする請求項1記載の外科用処置具。  2. The surgical treatment instrument according to claim 1, wherein the pressure detection means is a strain gauge. 前記圧力検知手段は、組織圧力情報を出力し、この出力信号に基づいて前記電源を制御することを特徴とする請求項1記載の外科用処置具。  2. The surgical treatment instrument according to claim 1, wherein the pressure detection means outputs tissue pressure information and controls the power source based on the output signal.
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