JP4203047B2 - Electrode needle device with temperature sensor - Google Patents

Electrode needle device with temperature sensor Download PDF

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JP4203047B2
JP4203047B2 JP2005182779A JP2005182779A JP4203047B2 JP 4203047 B2 JP4203047 B2 JP 4203047B2 JP 2005182779 A JP2005182779 A JP 2005182779A JP 2005182779 A JP2005182779 A JP 2005182779A JP 4203047 B2 JP4203047 B2 JP 4203047B2
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needle
inner needle
winding
connecting cylinder
temperature sensor
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JP2007000303A (en
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進 小林
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Top KK
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Description

本発明は、患部に高周波電流を流して患部の高周波熱凝固や焼灼等を行うために使用する医療用の温度センサ付き電極針装置に関する。   The present invention relates to an electrode needle device with a medical temperature sensor that is used for applying high-frequency current to an affected area to perform high-frequency thermal coagulation or cauterization of the affected area.

従来、医療用の電極針装置として、患部に穿刺可能で、先端部を除く外周面に絶縁被覆を施した中空の外針と、外針に挿通される内針とを備え、外針に内針を介して高周波電流を供給し、絶縁被覆が施されていない外針の先端部から患部に高周波電流を流すようにしたものは知られている。このもので、内針の先端部には温度センサが取付けられており、この温度センサにより患部の温度を把握できるようにしている(例えば、特許文献１参照)。   2. Description of the Related Art Conventionally, as an electrode needle device for medical use, a hollow outer needle that can be punctured on an affected area and has an outer peripheral surface other than a distal end is coated with an insulating coating, and an inner needle that is inserted through the outer needle are provided. It is known that a high-frequency current is supplied through a needle so that the high-frequency current flows from the distal end portion of the outer needle not coated with an insulating coating to the affected part. In this case, a temperature sensor is attached to the tip of the inner needle, and the temperature of the affected part can be grasped by this temperature sensor (see, for example, Patent Document 1).

ところで、外針の長さはメーカーによって、また、同じメーカーであっても製品ごとに多少の差異があるため、患部の温度を正確に把握するためには、温度センサの位置を外針の長さに合わせて調節すること、即ち、先端部に温度センサを有する内針を外針に対し軸方向に位置調節自在とすることが必要になる。そこで、従来、外針の基端部に連結される連結筒を設け、この連結筒に内針の基端部を軸方向に位置調節自在に内挿したものも知られている。   By the way, the length of the outer needle varies depending on the manufacturer, and even for the same manufacturer, there is a slight difference between the products. In order to accurately grasp the temperature of the affected area, the position of the temperature sensor is the length of the outer needle. It is necessary to adjust according to the height, that is, to make the position of the inner needle having the temperature sensor at the tip portion adjustable in the axial direction with respect to the outer needle. In view of this, conventionally, a connecting cylinder connected to the proximal end portion of the outer needle is provided, and the proximal end portion of the inner needle is inserted into the connecting cylinder so that the position of the inner needle can be adjusted in the axial direction.

このものでは、連結筒の周壁部に径方向のねじ孔を形成し、このねじ孔に螺挿した止めねじを内針の基端部外周面に押し当てて、内針の基端部を固定できるようにしている。然し、これでは、内針の位置調節に際し、一々止めねじを緩めたり締め付けたりする必要があり、操作が面倒になる不具合がある。
米国特許第４４１１２６６号明細書 In this case, a screw hole in the radial direction is formed in the peripheral wall portion of the connecting cylinder, and a set screw screwed into the screw hole is pressed against the outer peripheral surface of the proximal end portion of the inner needle to fix the proximal end portion of the inner needle I can do it. However, in this case, when adjusting the position of the inner needle, it is necessary to loosen or tighten the set screw one by one, and there is a problem that the operation becomes troublesome.
U.S. Pat. No. 4,411,266

本発明は、以上の点に鑑み、内針の位置調節を簡単な操作で行うことができるようにした操作性に優れた温度センサ付き電極針装置を提供することをその課題としている。   In view of the above points, an object of the present invention is to provide an electrode needle device with a temperature sensor that is excellent in operability so that the position adjustment of the inner needle can be performed with a simple operation.

上記課題を解決するために、本発明は、患部に穿刺可能で、先端部を除く外周面に絶縁被覆を施した中空の外針と、外針に挿通される、先端部に温度センサを有する内針とを備え、外針に内針を介して高周波電流を供給するようにした温度センサ付き電極針装置であって、外針の基端部に連結される連結筒を備え、この連結筒に内針の基端部が軸方向に位置調節自在に内挿されるものにおいて、連結筒内に、内針の基端部外周に巻き付けられる巻き付け部と、連結筒に固定される固定部とを有するばね部材が設けられている。 In order to solve the above-mentioned problems, the present invention has a hollow outer needle that can puncture an affected area and is coated with an insulating coating on an outer peripheral surface excluding the tip, and a temperature sensor at the tip that is inserted into the outer needle. An electrode needle device with a temperature sensor that includes an inner needle and supplies a high-frequency current to the outer needle via the inner needle, and includes a connecting cylinder that is connected to the proximal end portion of the outer needle. The inner end of the inner needle is inserted in such a manner that the position of the inner needle can be adjusted in the axial direction.In the connecting cylinder, a winding part wound around the outer periphery of the inner end of the inner needle, and a fixing part fixed to the connecting cylinder the spring member having are provided.

ここで、本発明によれば、常時はばね部材の巻き付け部と内針の基端部外周面との間に作用する摩擦力により、内針の基端部は連結筒に対し移動しないが、内針の基端部を巻き付け部の巻回方向と逆方向に回転すると、巻き付け部にこれを巻きほぐす力が作用して、巻き付け部と内針の基端部外周面との間に作用する摩擦力が減少する。そのため、内針の基端部を連結筒に対し軸方向に移動させて、内針、即ち、その先端部の温度センサを外針に対し軸方向に位置調節することが可能になる。そして、内針の位置調節に際し、従来のように止めねじを緩めたり締め付けたりする必要がなく、操作が簡単になる。 Here, according to the present invention, the base end portion of the inner needle does not move relative to the connecting cylinder due to the frictional force that acts between the winding portion of the spring member and the outer peripheral surface of the base end portion of the inner needle. When the proximal end portion of the inner needle is rotated in the direction opposite to the winding direction of the winding portion, a force for unwinding this acts on the winding portion and acts between the winding portion and the outer peripheral surface of the proximal end portion of the inner needle. The friction force decreases. Therefore, the proximal end portion of the inner needle is moved in the axial direction with respect to the connecting cylinder, and the position of the temperature sensor at the inner needle, that is, the distal end portion thereof can be adjusted in the axial direction with respect to the outer needle. Then, when adjusting the position of the inner needle, it is not necessary to loosen or tighten the set screw as in the conventional case, and the operation is simplified.

また、内針の基端部を軸方向に単純に押し引きするだけでは、ついつい力を入れすぎて微妙な位置調節を行うことが困難になるため、微妙な位置調節に際しては、内針の基端部を回転させながら押し引きする複合操作を行うのが一般的である。本発明では、この複合操作の回転を利用して巻き付け部を巻きほぐすことができるため、非常に合理的な操作で内針の位置調節を行うことができ、操作性に優れる。   In addition, simply pushing and pulling the proximal end of the inner needle in the axial direction makes it difficult to adjust the position slightly by applying too much force. It is common to perform a combined operation of pushing and pulling while rotating the end. In the present invention, since the winding portion can be unwound using the rotation of this combined operation, the position of the inner needle can be adjusted by a very rational operation, and the operability is excellent.

尚、ばね部材としては、コイルばねやゼンマイばねを用いることができる。そして、コイルばねでばね部材を構成する場合は、コイルばねを縮径部と拡径部とを有するものに形成して、縮径部を内針の基端部に対する巻き付け部とし、拡径部を連結筒に対する固定部とすれば良い。また、ゼンマイばねでばね部材を構成する場合は、ゼンマイばねの径方向内方部分を内針の基端部に対する巻き付け部とし、ゼンマイばねの径方向外方部分を連結筒に対する固定部とすれば良い。   In addition, a coil spring and a spring can be used as a spring member. And when comprising a spring member with a coil spring, a coil spring is formed in what has a reduced diameter part and an enlarged diameter part, a reduced diameter part is used as a winding part to the base end part of an inner needle, and an enlarged diameter part May be a fixing portion for the connecting cylinder. Further, when the spring member is constituted by the spring, if the radially inner portion of the spring is wound around the proximal end portion of the inner needle and the radially outer portion of the spring is fixed to the connecting cylinder, good.

以下、本発明の実施形態を図面を参照して説明する。図１は本発明の電極針装置の第１実施形態を示す縦断面図、図２は図１のＩＩ−ＩＩ線で切断した横断面図、図３は本発明の電極針装置の第２実施形態を示す縦断面図、図４は図３のＩＶ−ＩＶ線で切断した横断面図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing a first embodiment of the electrode needle device of the present invention, FIG. 2 is a transverse sectional view taken along line II-II of FIG. 1, and FIG. 3 is a second embodiment of the electrode needle device of the present invention. FIG. 4 is a transverse sectional view taken along line IV-IV in FIG.

図１を参照して、本発明の第１実施形態の電極針装置は、金属製の中空の外針１と、外針１に挿通される金属製の内針２と、外針１の基端部に連結される樹脂製の連結筒３とを備える。外針１の先端は、患部に穿刺可能となるように先鋭に形成され、また、外針１には、先端部を除く外周面に絶縁被覆１１が施されている。外針１は、基端のハブ１２において連結筒３の先端のルアーテーパー部３１に着脱自在に連結される。   Referring to FIG. 1, an electrode needle device according to a first embodiment of the present invention includes a metal hollow outer needle 1, a metal inner needle 2 inserted through the outer needle 1, and a base of the outer needle 1. And a resin-made connecting cylinder 3 connected to the end. The distal end of the outer needle 1 is sharply formed so that the affected part can be punctured, and the outer needle 1 is provided with an insulating coating 11 on the outer peripheral surface excluding the distal end. The outer needle 1 is detachably connected to the luer taper portion 31 at the distal end of the connecting cylinder 3 at the hub 12 at the proximal end.

内針２は中空に形成され、その先端に取付けるキャップ２ａの内面に熱電対から成る温度センサ２１が接着剤２２により内針２に対し電気的に絶縁した状態で取付けられている。そして、内針２内に温度センサ２１に連なる２本のワイヤ２１ａを挿通し、このワイヤ２１ａに温度表示器４を接続して、温度センサ２１で検出された温度を表示できるようにしている。尚、内針２内には、酸化マグネシウム等の絶縁材が充填されている。また、内針２には、高周波電源５が接続されている。そして、内針２を外針１の内周面の少なくとも一部に接触させ、外針１に内針２を介して高周波電流が供給されるようにしている。かくして、外針１を穿刺した患部に絶縁被覆１１を施していない外針１の先端部から高周波電流が流れ、患部に対し高周波熱凝固や焼灼等の処置が施される。   The inner needle 2 is formed in a hollow shape, and a temperature sensor 21 made of a thermocouple is attached to the inner surface of a cap 2 a attached to the tip of the inner needle 2 in an electrically insulated state from the inner needle 2 by an adhesive 22. Then, two wires 21 a connected to the temperature sensor 21 are inserted into the inner needle 2, and the temperature indicator 4 is connected to the wire 21 a so that the temperature detected by the temperature sensor 21 can be displayed. The inner needle 2 is filled with an insulating material such as magnesium oxide. In addition, a high frequency power source 5 is connected to the inner needle 2. The inner needle 2 is brought into contact with at least part of the inner peripheral surface of the outer needle 1 so that a high-frequency current is supplied to the outer needle 1 through the inner needle 2. Thus, a high frequency current flows from the distal end portion of the outer needle 1 where the insulating coating 11 is not applied to the affected area where the outer needle 1 has been punctured, and treatment such as high frequency thermal coagulation or cauterization is performed on the affected area.

内針２には、連結筒３に内挿される基端のスリーブ２３が固定されており、連結筒３の尾方に露出するスリーブ２３の基端には大径のノブ部２３ａが形成されている。また、連結筒３内には、スリーブ２３の外周に巻き付けられる巻き付け部３２ａと、連結筒３に固定される固定部３２ｂとを有するばね部材３２が設けられている。本実施形態では、ばね部材３２を、コイル内径がスリーブ２３の外径にほぼ等しい縮径部と、コイル外径が連結筒３の内径にほぼ等しい拡径部とを有するコイルばね６で構成し、縮径部をスリーブ２３に対する巻き付け部３２ａとしている。また、拡径部６ｂを、高周波誘導加熱等で連結筒３の内周面に固着させて、連結筒３に対する固定部３２ｂとしている。尚、コイルばね６は軸方向の隙間が空かないように形成されている。   A proximal end sleeve 23 inserted into the connecting cylinder 3 is fixed to the inner needle 2, and a large diameter knob portion 23 a is formed at the proximal end of the sleeve 23 exposed to the tail of the connecting cylinder 3. . Further, a spring member 32 having a winding portion 32 a wound around the outer periphery of the sleeve 23 and a fixing portion 32 b fixed to the connecting tube 3 is provided in the connecting tube 3. In the present embodiment, the spring member 32 is constituted by a coil spring 6 having a reduced diameter portion whose coil inner diameter is substantially equal to the outer diameter of the sleeve 23 and an enlarged diameter portion whose coil outer diameter is substantially equal to the inner diameter of the connecting cylinder 3. The reduced diameter portion is a winding portion 32a around the sleeve 23. Further, the enlarged diameter portion 6b is fixed to the inner peripheral surface of the connecting cylinder 3 by high frequency induction heating or the like, thereby forming a fixing portion 32b for the connecting cylinder 3. The coil spring 6 is formed so that there is no gap in the axial direction.

ここで、巻き付け部３２ａの巻回方向は、図２に示す如く、軸方向尾方から見て反時計方向である。スリーブ２３は、常時は、巻き付け部３２ａとスリーブ２３の外周面との間に作用する摩擦力により連結筒３に対し移動しない。一方、ノブ部２３ａを摘んでスリーブ２３を図２で時計方向に回転すると、巻き付け部３２ａにこれを巻きほぐす力が作用して、巻き付け部３２ａとスリーブ２３の外周面との間に作用する摩擦力が減少する。そのため、スリーブ２３を連結筒３に対し軸方向に移動させて、内針２、即ち、その先端部の温度センサ２１を外針１に対し軸方向に位置調節することが可能になる。これにより、外針１の長さが多少変化しても、温度センサ２１を外針１の針先側の最適位置に置いて、患部の温度を正確に把握することができる。   Here, as shown in FIG. 2, the winding direction of the winding portion 32a is counterclockwise as viewed from the axial direction. The sleeve 23 does not always move with respect to the connecting cylinder 3 due to a frictional force acting between the winding portion 32 a and the outer peripheral surface of the sleeve 23. On the other hand, when the knob 23a is picked and the sleeve 23 is rotated in the clockwise direction in FIG. 2, a force that unwinds the winding portion 32a acts, and friction acts between the winding portion 32a and the outer peripheral surface of the sleeve 23. Power is reduced. Therefore, it is possible to adjust the position of the inner needle 2, that is, the temperature sensor 21 at the tip thereof in the axial direction with respect to the outer needle 1 by moving the sleeve 23 in the axial direction with respect to the connecting cylinder 3. Thereby, even if the length of the outer needle 1 changes somewhat, the temperature sensor 21 can be placed at the optimum position on the needle tip side of the outer needle 1 to accurately grasp the temperature of the affected area.

ところで、スリーブ２３を軸方向に単純に押し引きするだけでは、ついつい力を入れすぎて微妙な位置調節を行うことが困難になる。従って、微妙な位置調節に際しては、スリーブ２３を回転させながら押し引きする複合操作を行うのが一般的である。そして、本実施形態では、スリーブ２３を時計方向に回転しながら軸方向に押し引きするという非常に合理的な複合操作で内針２(温度センサ２１)の位置調節が行われることになり、操作性に優れる。   By the way, simply pushing and pulling the sleeve 23 in the axial direction makes it difficult to perform fine position adjustment by applying too much force. Therefore, when performing fine position adjustment, it is common to perform a composite operation in which the sleeve 23 is pushed and pulled while rotating. In this embodiment, the position of the inner needle 2 (temperature sensor 21) is adjusted by a very rational combined operation of pushing the sleeve 23 in the axial direction while rotating the sleeve 23 clockwise. Excellent in properties.

次に、図３、図４を参照して、本発明の第２実施形態の電極針装置について説明する。第２実施形態における上記第１実施形態と同様の部材には上記と同一の符号を付している。第１実施形態と相違するのは、ばね部材３２としてゼンマイばね７を用いたことである。ここで、ゼンマイばね７の径方向内方部分がスリーブ２３に対する巻き付け部３２ａになっている。また、ゼンマイばね７の径方向外方部分に、連結筒３の周壁部に形成した係合孔３３に係合する爪部を形成し、この爪部を連結筒３に対する固定部３２ｂとしている。尚、ゼンマイばね７の径方向外方部分を高周波誘導加熱等により連結筒３に固着して、この部分を連結筒３に対する固定部３２ｂとしても良い。   Next, an electrode needle device according to a second embodiment of the present invention will be described with reference to FIGS. The same members as those in the first embodiment in the second embodiment are denoted by the same reference numerals as above. The difference from the first embodiment is that the spring 7 is used as the spring member 32. Here, the radially inner portion of the mainspring spring 7 serves as a winding portion 32 a for the sleeve 23. In addition, a claw portion that engages with an engagement hole 33 formed in the peripheral wall portion of the connecting cylinder 3 is formed on the radially outer portion of the mainspring spring 7, and this claw section is used as a fixing portion 32 b for the connecting cylinder 3. The radially outer portion of the mainspring spring 7 may be fixed to the connecting cylinder 3 by high frequency induction heating or the like, and this portion may be used as a fixing portion 32b for the connecting cylinder 3.

巻き付け部３２ａの巻回方向は、図４に示す如く、軸方向尾方から見て反時計方向である。従って、スリーブ２３を図４で時計方向に回転させると、巻き付け部３２ａにこれを巻きほぐす力が作用し、第１実施形態のものと同様に、スリーブ２３を連結筒３に対し軸方向に移動させて、内針２(温度センサ２１)を外針１に対し軸方向に位置調節することが可能になる。   As shown in FIG. 4, the winding direction of the winding portion 32a is counterclockwise as viewed from the axial direction. Therefore, when the sleeve 23 is rotated in the clockwise direction in FIG. 4, a force for unwinding this acts on the winding portion 32 a, and the sleeve 23 is moved in the axial direction with respect to the connecting cylinder 3 as in the first embodiment. Thus, the position of the inner needle 2 (temperature sensor 21) can be adjusted in the axial direction with respect to the outer needle 1.

尚、上記実施形態では、スリーブ２３の外周面を円筒面に形成しているが、スリーブ２３の外周面にその母線方向にのびる突条を形成し、スリーブ２３を巻き付け部３２ａの巻回方向と逆方向に回転させたときに突条が巻き付け部３２ａの端縁に係合して、巻き付け部３２ａにこれを巻きほぐす力が効率良く伝達されるようにすることも可能である。また、上記実施形態では、温度センサ２１として熱電対を用いているが、サーミスタ等の熱電対以外の温度センサを用いることも可能である。   In the above-described embodiment, the outer peripheral surface of the sleeve 23 is formed into a cylindrical surface. However, a protrusion extending in the generatrix direction is formed on the outer peripheral surface of the sleeve 23 so that the sleeve 23 has a winding direction of the winding portion 32a. It is also possible that the ridge engages with the edge of the winding portion 32a when rotated in the reverse direction, and the force for unwinding the winding portion 32a is efficiently transmitted to the winding portion 32a. Moreover, in the said embodiment, although the thermocouple is used as the temperature sensor 21, temperature sensors other than thermocouples, such as a thermistor, can also be used.

本発明装置の第１実施形態を示す縦断面図。The longitudinal cross-sectional view which shows 1st Embodiment of this invention apparatus. 図１のＩＩ−ＩＩ線で切断した横断面図。The cross-sectional view cut | disconnected by the II-II line | wire of FIG. 本発明装置の第２実施形態を示す縦断面図。The longitudinal cross-sectional view which shows 2nd Embodiment of this invention apparatus. 図３のＩＶ−ＩＶ線で切断した横断面図。FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3.

符号の説明Explanation of symbols

１…外針、１１…絶縁被覆、２…内針、２１…温度センサ、２３…スリーブ(内針の基端部)、３…連結筒、３２…ばね部材、３２ａ…巻き付け部、３２ｂ…固定部、６…コイルばね、７…ゼンマイばね。   DESCRIPTION OF SYMBOLS 1 ... Outer needle, 11 ... Insulation coating, 2 ... Inner needle, 21 ... Temperature sensor, 23 ... Sleeve (base end part of inner needle), 3 ... Connection cylinder, 32 ... Spring member, 32a ... Winding part, 32b ... Fixed Part 6 coil spring 7 spring spring

Claims (3)

患部に穿刺可能で、先端部を除く外周面に絶縁被覆を施した中空の外針と、外針に挿通される、先端部に温度センサを有する内針とを備え、外針に内針を介して高周波電流を供給するようにした温度センサ付き電極針装置であって、外針の基端部に連結される連結筒を備え、この連結筒に内針の基端部が軸方向に位置調節自在に内挿されるものにおいて、
連結筒内に、内針の基端部外周に巻き付けられる巻き付け部と、連結筒に固定される固定部とを有するばね部材が設けられ、常時は内針の基端部外周と巻き付け部との間の摩擦力により内針の基端部が連結筒に対し移動せず、内針の基端部を巻き付け部の巻回方向と逆方向に回転したときには、巻き付け部を巻きほぐす力が作用して内針の基端部外周と巻き付け部との間の摩擦力が減少し、内針の基端部が連結筒に対し軸方向に移動可能になることを特徴とする温度センサ付き電極針装置。 It has a hollow outer needle that can puncture the affected area and is coated with an insulating coating on the outer peripheral surface excluding the tip, and an inner needle that is inserted through the outer needle and has a temperature sensor at the tip. The electrode needle device with a temperature sensor is configured to supply a high-frequency current through a connecting cylinder connected to the proximal end of the outer needle, and the proximal end of the inner needle is positioned in the axial direction in the connecting cylinder. In what is adjustably inserted,
A spring member having a winding portion wound around the outer periphery of the proximal end portion of the inner needle and a fixed portion fixed to the connecting tube is provided in the connecting cylinder, and is normally provided between the outer periphery of the proximal end portion of the inner needle and the winding portion. When the base end of the inner needle does not move relative to the connecting cylinder due to the frictional force between them and the base end of the inner needle is rotated in the direction opposite to the winding direction of the winding part, a force that unwinds the winding part acts. Friction force between the outer periphery of the proximal end of the inner needle and the winding portion is reduced, and the proximal end of the inner needle is movable in the axial direction with respect to the connecting cylinder, . 前記ばね部材は縮径部と拡径部とを有するコイルばねで構成され、コイルばねの縮径部が前記巻き付け部となり、コイルばねの拡径部が前記固定部になることを特徴とする請求項１記載の温度センサ付き電極針装置。   The said spring member is comprised by the coil spring which has a diameter reduction part and an enlarged diameter part, The diameter reduction part of a coil spring becomes the said winding part, The diameter expansion part of a coil spring becomes the said fixing | fixed part, It is characterized by the above-mentioned. The electrode needle device with a temperature sensor according to Item 1. 前記ばね部材はゼンマイばねで構成され、ゼンマイばねの径方向内方部分が前記巻き付け部となり、ゼンマイばねの径方向外方部分が前記固定部になることを特徴とする請求項１記載の温度センサ付き電極針装置。   2. The temperature sensor according to claim 1, wherein the spring member is constituted by a spring, and a radially inner portion of the spring is the winding portion, and a radially outer portion of the spring is the fixing portion. With electrode needle device.
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CN113598936B (en) * 2021-09-07 2022-04-12 上海睿刀医疗科技有限公司 Multi-needle puncture device
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