JP2009160446A - Inducing catheter of laser fiber - Google Patents

Inducing catheter of laser fiber Download PDF

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JP2009160446A
JP2009160446A JP2009102963A JP2009102963A JP2009160446A JP 2009160446 A JP2009160446 A JP 2009160446A JP 2009102963 A JP2009102963 A JP 2009102963A JP 2009102963 A JP2009102963 A JP 2009102963A JP 2009160446 A JP2009160446 A JP 2009160446A
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balloon
laser fiber
catheter
laser
center
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JP4774449B2 (en
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Chiharu Ibukiyama
千晴 伊吹山
Hitoshi Nakajima
均 中島
Mikio Usui
幹雄 臼井
Akira Yamashina
章 山科
Hiroyuki Mihashi
宏行 三橋
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SB Kawasumi Laboratories Inc
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an inducing catheter of laser fiber capable of securely fixing a laser irradiation part of laser fiber to an affected part to activate a photosensitive substance PF, thereby securely executing the therapy of an aimed narrow part. <P>SOLUTION: In the inducing catheter 41 of laser fiber, an insertion port 47 for laser fiber LF is formed on the rear end of an outside tube 54, a photosensitive substance PF is fixed on the outer periphery of a balloon 52, a positioning marker 48 is set (A) on one site on the outer periphery of an inside tube 55 at the center of the balloon 52, or (B) on two sites at equal distances from the center of the balloon 52 on the outer periphery of the inside tube 55 on both sides of the balloon 52, and a stopper 43 of the laser fiber LF is set within the inside tube 55 at the center of the balloon 52 so that the tip end of the laser fiber LF stops at the center of the balloon 52. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は例えばPTCA(経皮的血管形成術)後のPDT(Photodynamic Therapy)等に好適に使用されるレーザーファイバーの誘導カテーテルに関する。   The present invention relates to a laser fiber guide catheter suitably used for PDT (Photodynamic Therapy) after PTCA (percutaneous angioplasty), for example.

PTCA(経皮的血管形成術)が開始されてから20年が経過したが血管の再狭窄という現象が最大の課題となっている。PTCA後の血管の再狭窄の原因はリモデリングや平滑筋細胞を主とする新生内膜増殖が考えられる。リモデリングに対しては再PTCAやステント留置が有効な治療法として確立されているがステント留置後の再狭窄予防法としては選択的に新生内膜増殖細胞(中膜細胞)のみを死滅させれば良いことがわかっている。   Twenty years have passed since the start of PTCA (percutaneous angioplasty), but the phenomenon of vascular restenosis is the biggest problem. Possible causes of vascular restenosis after PTCA are remodeling and neointimal proliferation mainly composed of smooth muscle cells. RePTCA and stent placement have been established as effective treatments for remodeling, but as a method for preventing restenosis after stent placement, only neointimal proliferating cells (media cells) can be selectively killed. I know that is good.

従来血管の再狭窄の治療法として次の放射線治療法が報告されている。
(1)γ線による冠動脈内放射線治療法γ線源の192Irワイヤーを血管の狭窄部に挿入固定して20から25Gyの放射線照射を行う方法。
(2)β線による冠動脈内放射線治療法
(A)β線源の90Y(90Sr/Y)ワイヤーを血管の狭窄部に挿入固定して4Gyの放射線照射を行う方法。
(B)β線源の30PをPSステントに付着させPSステントを血管の狭窄部に挿入固定して放射線照射を行う方法。
(C)β線源の188Reを含む液体をPTCAバルーンに注入し、バルーンを血管の狭窄部に挿入固定して放射線照射を行う方法。
Conventional radiotherapy has been reported as a treatment method for vascular restenosis.
(1) Intracoronary radiation therapy using γ-ray A method in which a 192 Ir wire as a γ-ray source is inserted and fixed in a stenosis portion of a blood vessel and irradiated with 20 to 25 Gy.
(2) Intracoronary radiation therapy using β rays (A) A method of performing 4 Gy radiation irradiation by inserting and fixing a 90 Y (90Sr / Y) wire of a β ray source into a stenosis portion of a blood vessel.
(B) A method in which 30 P of β-ray source is attached to a PS stent, and the PS stent is inserted and fixed in a stenosis portion of a blood vessel to perform irradiation.
(C) A method in which a liquid containing 188 Re as a β-ray source is injected into a PTCA balloon, and the balloon is inserted and fixed in a stenosis of a blood vessel to perform radiation irradiation.

国際公開第97/43966号(特表2001−525687号公報、第10から第15頁、図1)International Publication No. 97/43966 (Japanese Patent Publication No. 2001-525687, pages 10 to 15, FIG. 1) 特表平6−510450号公報(第10頁から第11頁)JP 6-510450 A (pages 10 to 11)

本発明が解決しようとする問題点は、前記の放射線治療方法では、
(a)放射線治療後も血管の再狭窄が起こりPTCA後の再狭窄予防としては十分に満足がゆくものではない。
(b)またγ線では患者の他の臓器や医療スタッフの被曝が起きやすい。
(c)さらにγ、β線の双方とも至適線量の問題が未解決である。
等の点である。そこで本発明者らは以上の課題を解決するために鋭意検討を重ねた結果次の発明に到達した。
The problem to be solved by the present invention is that in the above-mentioned radiotherapy method,
(A) Even after radiation treatment, vascular restenosis occurs, and it is not satisfactory enough to prevent restenosis after PTCA.
(B) In addition, gamma rays are likely to cause exposure to other organs of the patient and medical staff.
(C) Furthermore, the problem of the optimum dose for both γ and β rays has not been solved.
Etc. Therefore, as a result of intensive studies to solve the above problems, the present inventors have reached the following invention.

[1]本発明は、シャフト(42)は、内側チューブ(55)と外側チューブ(54)とを有し、
前記外側チューブ(54)の先端にバルーン(52)を配置し、
前記内側チューブ(55)を前記外側チューブ(54)の後方から前記バルーン(52)の内部を経て前記バルーン(52)の先端に至るまで配置し、
少なくとも前記内側チューブ(55)の内部にレーザーファイバー(LF)を挿入可能なルーメン(45)を有し、
前記外側チューブ(54)の後端に、レーザーファイバー(LF)の挿入口(47)を形成し、
前記バルーン(52)の外周に光感受性物質(PF)を固定し、
位置決め用のマーカー(48)を、
(A)前記バルーン(52)中央の前記内側チューブ(55)の外周に一箇所設けるか、または
(B)前記バルーン(52)中央から等間隔にバルーン(52)両側の内側チューブ(55)の外周に二箇所設け、
前記レーザーファイバー(LF)のストッパー(43)を、前記レーザーファイバー(LF)の先端がバルーン(52)の中央で止まるように、前記バルーン(52)中央の前記内側チューブ(55)内に設けた、レーザーファイバーの誘導カテーテル(41)を提供する。
[1] In the present invention, the shaft (42) has an inner tube (55) and an outer tube (54),
Placing a balloon (52) at the tip of the outer tube (54);
The inner tube (55) is arranged from the rear of the outer tube (54) through the inside of the balloon (52) to the tip of the balloon (52),
A lumen (45) into which a laser fiber (LF) can be inserted at least inside the inner tube (55);
An insertion port (47) of a laser fiber (LF) is formed at the rear end of the outer tube (54),
A photosensitive substance (PF) is fixed to the outer periphery of the balloon (52),
The positioning marker (48)
(A) One place is provided on the outer periphery of the inner tube (55) at the center of the balloon (52), or (B) The inner tubes (55) on both sides of the balloon (52) are equidistant from the center of the balloon (52). Two places on the outer periphery,
A stopper (43) of the laser fiber (LF) is provided in the inner tube (55) at the center of the balloon (52) so that the tip of the laser fiber (LF) stops at the center of the balloon (52). A laser fiber guide catheter (41) is provided.

レーザーファイバーLFのレーザー照射部分を確実に患部に固定でき光感受性物質PFを活性化して目的の狭窄部の治療を確実に行うことができる。   The laser-irradiated portion of the laser fiber LF can be reliably fixed to the affected area, and the photosensitive substance PF can be activated to reliably treat the target stenosis.

参考例のレーザーファイバーの誘導カテーテル1を示す概略図Schematic showing a laser fiber guiding catheter 1 of a reference example その他の参考例のレーザーファイバーの誘導カテーテルを示すカテーテル21の概略図Schematic of catheter 21 showing a laser fiber guiding catheter of another reference example 本発明のレーザーファイバーの誘導カテーテル41の実施例を示す概略図Schematic which shows the Example of the guiding catheter 41 of the laser fiber of this invention 図3のバルーン52付近の拡大図Enlarged view of the vicinity of the balloon 52 in FIG. 図4のA−A断面図AA sectional view of FIG.

図1は参考例のレーザーファイバーの誘導カテーテル(以下、「カテーテル」)の一例を示すカテーテル1の概略図である。カテーテル1は少なくとも内部にレーザーファイバーLFを挿入可能なルーメン4を有するシャフト2より構成され、シャフト2はレーザーの透過可能な材質より形成される。シャフト2前方の内部にはレーザーファイバーLFのストッパー3が形成され、シャフト2の先端近傍の外部には位置決め用のマーカー8が形成されている。シャフト2の内部は前記ストッパー3によりレーザーファイバーのルーメン4とガイドワイヤーのルーメン5により区画され、ストッパー3近傍のシャフト2の側壁にガイドワイヤーGWの挿入口6と洗浄液や造影剤の導出入を行う側孔9が形成されている。またシャフト2の後端には少なくともレーザーファイバーの挿入口7(必要に応じて洗浄液、造影剤等の液体の導出入口11)を形成したコネクタ10が装着されている。造影剤等は導出入口11からシャフト2のルーメン4に挿入されるレーザーファイバーLFの外周とシャフト2の内壁面の間に形成されるスペースSの間を経て側孔9より導出入される。   FIG. 1 is a schematic view of a catheter 1 showing an example of a laser fiber guiding catheter (hereinafter referred to as “catheter”) of a reference example. The catheter 1 includes at least a shaft 2 having a lumen 4 into which a laser fiber LF can be inserted. The shaft 2 is formed of a material that can transmit laser. A stopper 3 for the laser fiber LF is formed inside the front of the shaft 2, and a positioning marker 8 is formed outside the vicinity of the tip of the shaft 2. The inside of the shaft 2 is partitioned by the stopper 3 by the lumen 4 of the laser fiber and the lumen 5 of the guide wire, and the guide wire GW insertion port 6 and the cleaning solution or contrast medium are led in and out of the side wall of the shaft 2 near the stopper 3. Side holes 9 are formed. At the rear end of the shaft 2, a connector 10 having at least a laser fiber insertion port 7 (a liquid outlet 11 for a cleaning liquid, a contrast medium or the like as necessary) is mounted. A contrast agent or the like is led out from the side hole 9 through a space S formed between the outer periphery of the laser fiber LF inserted into the lumen 4 of the shaft 2 and the inner wall surface of the shaft 2 from the outlet 11.

図2は参考例のレーザーファイバーの誘導カテーテル(以下、「カテーテル」)のその他の例を示すカテーテル21の概略図である。カテーテル21は二つのマーカー28a、28bをシャフト22の先端近傍と前方の外部に形成し、レーザーファイバーLFの先端がマーカー28aとマーカー28bの中間Cで停止することができるようにマーカー28aとマーカー28bの中間位置Cにストッパー23の後端を配置したものである。このためレーザーファイバーLFの位置決めが容易となる。その他のレーザーファイバーの誘導カテーテル21の構成部材はカテーテル1の構成と実質的に同一であるから詳細な説明は省略する。   FIG. 2 is a schematic view of a catheter 21 showing another example of a laser fiber guide catheter (hereinafter referred to as “catheter”) of a reference example. The catheter 21 has two markers 28a and 28b formed near the tip of the shaft 22 and outside the front, and the tip of the laser fiber LF can be stopped at the middle C between the marker 28a and the marker 28b. The rear end of the stopper 23 is arranged at an intermediate position C. For this reason, positioning of the laser fiber LF becomes easy. The other constituent members of the laser fiber guide catheter 21 are substantially the same as those of the catheter 1, and thus detailed description thereof is omitted.

次にカテーテル1の使用方法の一例について説明する。例えばセルジンガー法により大腿動脈を確保し、薬剤投与カテーテルを用いて光感受性物質PFを血管の目的の狭窄部に投与する。ガイドワイヤーGWによりガイディングカテーテルを前記狭窄部付近まで挿入する。続いてガイディングカテーテルのルーメン内にカテーテル1を挿入し、X線で透視しながらマーカー8が目的の狭窄部付近に位置するように位置決めを行う。レーザーファイバーLFをルーメン4内にその先端がストッパー3に突きあたるまで挿入する。レーザーをレーザーファイバーLFの先端から照射して光感受性物質PFを活性化させて目的とする細胞を死滅させる。カテーテル21もカテーテル1と同様に使用されるが、カテーテル21では前記のように二つのマーカー28a、28bを形成することによりレーザーファイバーLFの先端が目的の狭窄部に確実に位置するように位置決めできるので、レーザーの照射を確実に効率良く行うことができる。   Next, an example of how to use the catheter 1 will be described. For example, the femoral artery is secured by the Seldinger method, and the photosensitive substance PF is administered to the target stenosis of the blood vessel using a drug administration catheter. A guiding catheter is inserted up to the vicinity of the stenosis with a guide wire GW. Subsequently, the catheter 1 is inserted into the lumen of the guiding catheter, and positioning is performed so that the marker 8 is positioned in the vicinity of the target stenosis while being seen through with X-rays. The laser fiber LF is inserted into the lumen 4 until its tip hits the stopper 3. The target cell is killed by irradiating a laser beam from the tip of the laser fiber LF to activate the photosensitive substance PF. The catheter 21 is used in the same manner as the catheter 1, but in the catheter 21, the two markers 28a and 28b are formed as described above so that the tip of the laser fiber LF can be positioned so as to be surely positioned at the target stenosis. Therefore, laser irradiation can be performed reliably and efficiently.

図3は本発明のレーザーファイバーの誘導カテーテル41(以下、「カテーテル41」)の実施例を示す概略図(図4は図3のバルーン52付近の拡大図で、図5は図4のA−A断面図)である。カテーテル41はシャフト42の外側チューブ54の先端にバルーン52を配置し、シャフト42の内側チューブ55を外側チューブ54の後方からバルーン52の内部を経てバルーン52の先端に至るまで配置し、外側チューブ54の後端にガイドワイヤーGW及びレーザーファイバーLFの挿入口47とバルーン拡張用流体の導入口58を有するコネクタ50を配置することにより構成される。前記挿入口47は内側チューブ55の内部(ガイドワイヤーGWとレーザーファイバーLFのルーメン45)を経て内側チューブ55の先端開口部59と連通し、導入口58はコネクタ50と外側チューブ54の内部、先端開口部60を経てバルーン52の内部と連通している。
本発明で光感受性物質PFとはレーザーの照射により活性化し、目的とする細胞を死滅させる物質であり、例えばフォトフリン等が使用される。また光感受性物質PFのバルーン52の外周への固定は例えばゲル化して行うことができる。また光感受性物質PFの投与は、バルーン52の外周以外に例えば局所注入カテーテルにより局所投与しても良いしまたは静注により投与して病変部に集積させることができる。また位置決め用のマーカー48をバルーン52中央の内側チューブ55の外周に一箇所設けても良いし、または前記バルーン52中央から等間隔にバルーン52両側の内側チューブ55の外周に二箇所設けても良い。またレーザーファイバーLFのストッパー43をレーザーファイバーLFの先端がバルーン52の中央で止まるようにバルーン52中央の内側チューブ55の内周に設けても良い。
次に本発明のカテーテル41の使用方法の一例について説明する。例えばセルジンガー法により大腿動脈を確保し、ガイドワイヤーによりガイディングカテーテルを目的の狭窄部付近まで挿入する。続いてガイディングカテーテルの内腔にカテーテル41を挿通し、バルーン52を狭窄部に位置させて膨張させる。これにより血流を遮断して、光感受性物質PFの局所物理的密着吸収性を高めるとともにレーザー光の透過性を確保することが可能となる。レーザーファイバーをバルーン52の先端まで挿入し、レーザーを照射して光感受性物質PFを活性化させて目的とする細胞を死滅させる。
FIG. 3 is a schematic view showing an embodiment of a laser fiber guide catheter 41 (hereinafter referred to as “catheter 41”) of the present invention (FIG. 4 is an enlarged view of the vicinity of the balloon 52 of FIG. 3, and FIG. (A sectional view). In the catheter 41, the balloon 52 is disposed at the distal end of the outer tube 54 of the shaft 42, and the inner tube 55 of the shaft 42 is disposed from the rear of the outer tube 54 to the distal end of the balloon 52 through the inside of the balloon 52. A connector 50 having an insertion port 47 for a guide wire GW and a laser fiber LF and an introduction port 58 for a balloon expansion fluid is arranged at the rear end. The insertion port 47 communicates with the distal end opening 59 of the inner tube 55 through the inside of the inner tube 55 (the guide wire GW and the lumen 45 of the laser fiber LF), and the introduction port 58 is located at the inner end of the connector 50 and the outer tube 54. It communicates with the inside of the balloon 52 through the opening 60.
In the present invention, the photosensitive substance PF is a substance that is activated by laser irradiation and kills the target cells. For example, photofrin is used. The photosensitive substance PF can be fixed to the outer periphery of the balloon 52 by, for example, gelation. In addition to the outer periphery of the balloon 52, the photosensitive substance PF may be administered locally by, for example, a local injection catheter, or can be administered intravenously and accumulated in the lesion. One positioning marker 48 may be provided on the outer periphery of the inner tube 55 in the center of the balloon 52, or two markers may be provided on the outer periphery of the inner tube 55 on both sides of the balloon 52 at equal intervals from the center of the balloon 52. . Further, a stopper 43 of the laser fiber LF may be provided on the inner periphery of the inner tube 55 at the center of the balloon 52 so that the tip of the laser fiber LF stops at the center of the balloon 52.
Next, an example of a method for using the catheter 41 of the present invention will be described. For example, the femoral artery is secured by the Seldinger method, and the guiding catheter is inserted to the vicinity of the target stenosis using a guide wire. Subsequently, the catheter 41 is inserted into the lumen of the guiding catheter, and the balloon 52 is positioned at the stenosis and inflated. As a result, the blood flow can be blocked, the local physical adhesion and absorption of the photosensitive substance PF can be increased, and the laser beam transmission can be ensured. The laser fiber is inserted to the tip of the balloon 52, and the laser is irradiated to activate the photosensitive substance PF to kill the target cell.

カテーテル1(21)のシャフト2(22)構成材料は、レーザーが透過できる材質であれば何でも使用することができる。またカテーテル41のシャフト42(外側チューブ54、内側チューブ55)とバルーン52はレーザーが透過できかつレーザーがバルーン52の外周または局所投与、静注投与した光感受性物質PFを活性化できる程度の透過性を有する材料であれば何でも使用することができる。レーザーの透過性能は材料の透明性、肉厚等に依存するが、レーザーの種類、出力、照射時間等の諸条件等も考慮して、狭窄部等の治療目的に応じて自由に設定することができる。本発明ではレーザーが透過できる構成材料として例えばポリカーボネート、ポリアクリレート、ポリメチルペンテン、ポリエチレンテレフタレート、ポリエチレン、ポリアミド、ナイロン系等が使用できる。また本発明のカテーテル1(21)のシャフト2(22)は要するにレーザーファイバーLFの先端がストッパー3(23)に当接される部分が、またカテーテル41のシャフト42(外側チューブ54、内側チューブ55)とバルーン52はレーザーファイバーLFの先端のレーザーの照射部分がレーザーの透過できる材料で形成されておれば良いので、当該部分のみを他の部分(レーザーの透過できない材料でも可)と別パーツにより形成してレーザーの透過できる材料により形成しても良い。また前記マーカー8(28a、28b、48)は例えば金、プラチナ等のX線不透過性のものが使用される。   As the material for the shaft 2 (22) of the catheter 1 (21), any material can be used as long as it can transmit a laser. Further, the shaft 42 (outer tube 54, inner tube 55) of the catheter 41 and the balloon 52 are permeable so that the laser can pass through and the laser can activate the photosensitive substance PF which is administered to the outer periphery or the local area of the balloon 52 or intravenously. Any material can be used. The laser transmission performance depends on the transparency, thickness, etc. of the material, but it can be freely set according to the treatment purpose of the stenosis, etc., taking into account various conditions such as the type of laser, output, and irradiation time. Can do. In the present invention, for example, polycarbonate, polyacrylate, polymethylpentene, polyethylene terephthalate, polyethylene, polyamide, nylon or the like can be used as a constituent material that can transmit laser. In addition, the shaft 2 (22) of the catheter 1 (21) of the present invention is basically the portion where the tip of the laser fiber LF abuts against the stopper 3 (23), and the shaft 42 (outer tube 54, inner tube 55) of the catheter 41. ) And the balloon 52 only need to be formed of a material that can transmit the laser at the tip of the laser fiber LF. It may be formed of a material which can be formed and can transmit a laser. The marker 8 (28a, 28b, 48) is made of an X-ray opaque material such as gold or platinum.

ビーグル犬大腿動脈に対して薬剤投与カテーテルを用い光感受性物質PFとしてフォトフリン5mgを血管内投与した。ヒト冠動脈にも挿入可能なシャフト2の外径が4Fr.のカテーテルをシャフトの外径が7Fr.のガイディングカテーテルに通じフォトフリン投与部位まで挿入した。シリカ製のレーザーファイバーLFをガイドワイヤー1の先端の透明部分まですすめYag−OPOレーザーを2mj/pulse(50Hz)、20分間もしくは10分間照射しPDTを施行した。動脈造影をPDT施行前、直後及び一週間後に施行した後、同部位を組織学的に検討した。照射中のレーザーファイバーLF先端温度は37度であった。なお、フォトフリン投与部位の新鮮凍結切片を蛍光顕微鏡で観察し、同物質の集積性を確認した。   Photofrin 5 mg was administered intravascularly as a photosensitive substance PF to a beagle femoral artery using a drug administration catheter. The outer diameter of the shaft 2 that can be inserted into the human coronary artery is 4 Fr. Catheter with an outer diameter of 7 Fr. And inserted through the guiding catheter to the site of photofrin administration. A laser fiber LF made of silica was passed through the transparent portion at the tip of the guide wire 1 and a Yag-OPO laser was irradiated at 2 mj / pulse (50 Hz) for 20 minutes or 10 minutes to perform PDT. Arteriography was performed before, immediately after and 1 week after PDT, and the same site was examined histologically. The tip temperature of the laser fiber LF during irradiation was 37 degrees. In addition, the fresh frozen section | slice of the photofurin administration site | part was observed with the fluorescence microscope, and the accumulation property of the same substance was confirmed.

蛍光顕微鏡で血管中膜にフォトフリンの赤い蛍光を認め、薬液投与カテーテルによるフォトフリン投与の有効性が示された。動脈造影では全経過を通じてPDTを施行した血管に異常は見られなかった。PDT部位の組織所見では、全例で中膜細胞は壊死・消滅しており、PDT非施行部位に比し優位に中膜細胞画数は減少していた。20分照射では一部中膜の内膜側が脱落消失していたが、10分照射では同所見は見られなかった。PDTにより中膜細胞を選択的に壊死させることが可能で、本法の再狭窄予防に対する有効性が示唆された。   Fluorescence microscopy showed red fluorescence of photofrin in the vascular media, indicating the effectiveness of photofrin administration with a drug administration catheter. Arteriography showed no abnormalities in the blood vessels undergoing PDT throughout the course. In the histological findings of the PDT site, the medial cells were necrotic and extinct in all cases, and the number of medial cell fractions was significantly reduced as compared with the site where PDT was not performed. A part of the intima side of the intima disappeared and disappeared after 20 minutes of irradiation, but the same findings were not observed after 10 minutes of irradiation. PDT was able to selectively necrotize mesothelial cells, suggesting the effectiveness of this method for preventing restenosis.

1、21、41 レーザーファイバーの誘導カテーテル(カテーテル)
2、22、42 シャフト
3、23 (レーサーファイバーの)ストッパー
4、24 (レーサーファイバーの)ルーメン
5、25 (ガイドワイヤーの)ルーメン
6、26 (ガイドワイヤーの)挿入口
7、27 (レーザーファイバーの)挿入口
8、28(28a、28b) マーカー
LF レーザーファイバー
GW ガイドワイヤー
9、29 側孔
10、30、50 コネクタ
11 (洗浄液、造影剤等の液体の)導出入口
PF 光感受性物質
43 ストッパー
45 (ガイドワイヤーとレーザーファイバーの)ルーメン
47 (ガイドワイヤーとレーザーファイバーの)挿入口
48 マーカー
52 バルーン
54 外側チューブ
55 内側チューブ
58 (バルーン拡張用流体の)導入口
59 (内側チューブの)先端開口部
60 (外側チューブの)先端開口部
1, 21, 41 Laser fiber guide catheter (catheter)
2, 22, 42 Shaft 3, 23 Stopper 4 (for racer fiber) Lumen 5, 25 (for racer fiber) Lumen 6, 25 (for guide wire) Lumen 6, 26 (for guide wire) Insertion port 7, 27 (for laser fiber) ) Insertion openings 8, 28 (28a, 28b) Marker LF Laser fiber GW Guide wire 9, 29 Side hole 10, 30, 50 Connector 11 (For liquid such as cleaning liquid, contrast medium) Outlet PF Photosensitive substance 43 Stopper 45 Lumen 47 (guide wire and laser fiber) insertion port 48 (guide wire and laser fiber) insertion port 48 Marker 52 Balloon 54 Outer tube 55 Inner tube 58 Inlet port 59 (for balloon expansion fluid) Tip opening 60 (inner tube) Tip opening (outer tube)

Claims (1)

シャフト(42)は、内側チューブ(55)と外側チューブ(54)とを有し、
前記外側チューブ(54)の先端にバルーン(52)を配置し、
前記内側チューブ(55)を前記外側チューブ(54)の後方から前記バルーン(52)の内部を経て前記バルーン(52)の先端に至るまで配置し、
少なくとも前記内側チューブ(55)の内部にレーザーファイバー(LF)を挿入可能なルーメン(45)を有し、
前記外側チューブ(54)の後端に、レーザーファイバー(LF)の挿入口(47)を形成し、
前記バルーン(52)の外周に光感受性物質(PF)を固定し、
位置決め用のマーカー(48)を、
(A)前記バルーン(52)中央の前記内側チューブ(55)の外周に一箇所設けるか、または
(B)前記バルーン(52)中央から等間隔にバルーン(52)両側の内側チューブ(55)の外周に二箇所設け、
前記レーザーファイバー(LF)のストッパー(43)を、前記レーザーファイバー(LF)の先端がバルーン(52)の中央で止まるように、前記バルーン(52)中央の前記内側チューブ(55)内に設けた、
ことを特徴とするレーザーファイバーの誘導カテーテル(41)。
The shaft (42) has an inner tube (55) and an outer tube (54),
Placing a balloon (52) at the tip of the outer tube (54);
The inner tube (55) is arranged from the rear of the outer tube (54) through the inside of the balloon (52) to the tip of the balloon (52),
A lumen (45) into which a laser fiber (LF) can be inserted at least inside the inner tube (55);
An insertion port (47) of a laser fiber (LF) is formed at the rear end of the outer tube (54),
A photosensitive substance (PF) is fixed to the outer periphery of the balloon (52),
The positioning marker (48)
(A) One place is provided on the outer periphery of the inner tube (55) at the center of the balloon (52), or (B) The inner tubes (55) on both sides of the balloon (52) are equidistant from the center of the balloon (52). Two places on the outer periphery,
A stopper (43) of the laser fiber (LF) is provided in the inner tube (55) at the center of the balloon (52) so that the tip of the laser fiber (LF) stops at the center of the balloon (52). ,
A laser fiber guide catheter (41) characterized by the above.
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH021290A (en) * 1988-06-06 1990-01-05 Sumitomo Electric Ind Ltd Balloon for catheter
JPH02185269A (en) * 1989-01-12 1990-07-19 Olympus Optical Co Ltd Photochemical treatment device
JPH0394777A (en) * 1989-09-08 1991-04-19 Olympus Optical Co Ltd Medical treatment device
JPH06510450A (en) * 1991-08-30 1994-11-24 アメリカン・メディカル・システムズ Surgical equipment and its use
JPH08739A (en) * 1994-06-22 1996-01-09 Mitsubishi Cable Ind Ltd Catheter
WO1997043966A1 (en) * 1996-05-20 1997-11-27 Qlt Phototherapeutics, Inc. Improved phototherapeutic methods and devices for irradiating columnar environments
WO1998022034A2 (en) * 1996-11-21 1998-05-28 Boston Scientific Corporation Interventional photonic energy emitter system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH021290A (en) * 1988-06-06 1990-01-05 Sumitomo Electric Ind Ltd Balloon for catheter
JPH02185269A (en) * 1989-01-12 1990-07-19 Olympus Optical Co Ltd Photochemical treatment device
JPH0394777A (en) * 1989-09-08 1991-04-19 Olympus Optical Co Ltd Medical treatment device
JPH06510450A (en) * 1991-08-30 1994-11-24 アメリカン・メディカル・システムズ Surgical equipment and its use
JPH08739A (en) * 1994-06-22 1996-01-09 Mitsubishi Cable Ind Ltd Catheter
WO1997043966A1 (en) * 1996-05-20 1997-11-27 Qlt Phototherapeutics, Inc. Improved phototherapeutic methods and devices for irradiating columnar environments
WO1998022034A2 (en) * 1996-11-21 1998-05-28 Boston Scientific Corporation Interventional photonic energy emitter system

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