JP4154617B2 - Balloon catheter - Google Patents

Balloon catheter Download PDF

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Publication number
JP4154617B2
JP4154617B2 JP2006070707A JP2006070707A JP4154617B2 JP 4154617 B2 JP4154617 B2 JP 4154617B2 JP 2006070707 A JP2006070707 A JP 2006070707A JP 2006070707 A JP2006070707 A JP 2006070707A JP 4154617 B2 JP4154617 B2 JP 4154617B2
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Japan
Prior art keywords
balloon
shaft
balloon catheter
blood vessel
outer diameter
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JP2006070707A
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JP2006175246A (en
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克也 宮川
兆一 岸上
裕治 田中
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Nipro Corp
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Nipro Corp
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本発明はバルーンカテーテルに関し、特に心臓カテーテルを用いて行う検査に好適である。   The present invention relates to a balloon catheter, and is particularly suitable for examinations performed using a cardiac catheter.

心臓分野において、近年、カテーテル治療や外科的治療が行われているが、心臓の治療に際しては、正確かつ詳細な心機能及び血行動態の評価が必要となる。定常状態における評価に加え、負荷を加えたときの変化に対応する心血管機能の評価を行えば、予備的な心機能や潜在的な病変の評価を行うことができる。例えば、一時的な下大静脈閉塞による前負荷減少時の心室圧と容積の関係から、負荷に影響されない心収縮性、心血管連鎖関係、心室エネルギー関係を推測することができる。バルーンカテーテルはこのような評価に際して一時的な血管の閉塞に用いられる。バルーンカテーテルは、図4に示すように、一般にその先端部に小型のバルーン10が装着されており、バルーン10を拡張させることにより血管を閉塞するものである。バルーンは通常、収縮時にはチューブ状または風船状であるが、バルーンの拡張径が拡張前の5倍以上であることを必要とされる場合には、風船状のものが用いられる。   In recent years, catheter treatment and surgical treatment have been performed in the heart field. However, accurate and detailed evaluation of cardiac function and hemodynamics is required for heart treatment. If the cardiovascular function corresponding to the change when the load is applied is evaluated in addition to the evaluation in the steady state, the preliminary cardiac function and the potential lesion can be evaluated. For example, from the relationship between ventricular pressure and volume when the preload is reduced due to temporary inferior vena cava occlusion, the cardiac contractility, cardiovascular chain relationship, and ventricular energy relationship that are not affected by the load can be estimated. Balloon catheters are used for temporary vessel occlusion in such evaluation. As shown in FIG. 4, the balloon catheter is generally equipped with a small balloon 10 at its tip, and the balloon 10 is expanded to close the blood vessel. Balloons are usually tube-like or balloon-like when deflated, but balloon-like ones are used when the balloon needs to have an expanded diameter of 5 times or more that before expansion.

しかしながら、風船状のバルーンは、チューブ状のものに比べ収縮時の径が大きく、そのため体内に挿入する際に用いるシースイントロデューサーの逆止弁や先端に引っかかり、バルーンを破損する虞がある。また、それらの問題を回避するために、よりサイズの大きなシースイントロデューサーを採用した場合、今度は患者の血管を損傷する危険性が高くなるので、問題である、   However, the balloon-shaped balloon has a larger diameter when contracted than the tube-shaped balloon, and therefore, the balloon may be caught by a check valve or a tip of a sheath introducer used for insertion into the body, and the balloon may be damaged. Also, if a larger size sheath introducer is employed to avoid these problems, this is a problem because it increases the risk of damaging the patient's blood vessels.

本発明は上記の事情に鑑みてなされたもので、血管の閉塞を容易に行え、バルーン収縮時の径が小さく、より細いシースイントロデューサーを使用可能なバルーンカテーテルを提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a balloon catheter that can easily occlude blood vessels, has a small diameter when the balloon is deflated, and can use a thinner sheath introducer.

本発明者等は、上記の課題を解決するために鋭意検討の結果、風船状のバルーンをシャフトにスクリュー状に取り付けることにより、バルーン収縮時の径を細径化状態にすることができることに想到し、本発明を完成した。すなわち、本発明は、シャフトの先端部の周りに風船状の中空バルーンが拡張前にスクリュー状に変形されて取り付けられてなる一時的血管閉鎖用バルーンカテーテルであって、約2〜5mmの外径を有する両端の開放した前記中空バルーンの一端がシャフトに固定された後、該中空バルーンが捻られてシャフトの周りにスクリュー状に変形された状態で、他端が該シャフトに固定されてなり、拡張前の外径の5〜8倍に拡張できるバルーンカテーテルである。   As a result of intensive studies to solve the above-mentioned problems, the present inventors have conceived that the diameter at the time of balloon contraction can be reduced by attaching the balloon-shaped balloon to the shaft in a screw shape. The present invention has been completed. That is, the present invention is a temporary blood vessel closure balloon catheter in which a balloon-shaped hollow balloon is deformed and attached to a screw shape before expansion around the tip portion of a shaft, and has an outer diameter of about 2 to 5 mm. After one end of the hollow balloon having both ends opened is fixed to the shaft, the hollow balloon is twisted and deformed into a screw shape around the shaft, and the other end is fixed to the shaft. This balloon catheter can be expanded to 5 to 8 times its outer diameter before expansion.

本発明のバルーンカテーテルを採用すれば、バルーンカテーテルのシースイントロデューサーへの挿入、抜去時の抵抗を軽減させることが可能となり、バルーンの破損を回避することができる。また、より細いシースイントロデューサーを使用することができるので、これによる血管の損傷を少なくすることができる。   If the balloon catheter of the present invention is employed, it is possible to reduce resistance when the balloon catheter is inserted into and removed from the sheath introducer, and damage to the balloon can be avoided. Moreover, since a thinner sheath introducer can be used, the damage of the blood vessel by this can be reduced.

次に本発明の実施例について図面に基づいて説明する。
図1は本発明の一実施例を示す平面図であり、図2は図1のバルーン部分の拡大図、図3は図1においてバルーンを膨らませた状態を示す図である。
図1及び図2に示すように、バルーンカテーテルは、シャフト2と、このシャフト2の先端部にスクリュー状に変形されて取り付けられた風船状のバルーン1と、シャフト2の基端のハブ3に接続チューブ4を介して接続された二方活栓5からなる。そして二方活栓5の基端には生理食塩水の注入口6が設けられている。
Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is an enlarged view of a balloon portion of FIG. 1, and FIG. 3 is a view showing a state where the balloon is inflated in FIG.
As shown in FIGS. 1 and 2, the balloon catheter is connected to a shaft 2, a balloon-like balloon 1 that is deformed and attached to the distal end portion of the shaft 2, and a hub 3 at the proximal end of the shaft 2. It consists of a two-way cock 5 connected via a connecting tube 4. A physiological saline injection port 6 is provided at the proximal end of the two-way cock 5.

シャフト2は、大腿静脈よりシースイントロデューサー(図示していない)を介して血管内に挿入可能であり、かつ血管の損傷を起こさない程度の硬さを有している。シャフト2は真円もしくはそれに近い形状をしており、サイズは、望ましくは外径1〜2mmである。シャフト2にはバルーン1を膨らませる生理食塩水を送るためのルーメン(図示していない)が設けられており、ルーメンの数は必要に応じて決められる。シャフトはガイドワイヤー用のルーメン(図示していない)を設けた二重管であってもよい。シャフト2の形成材料としては、ポリオレフィンやポリアミド、ポリエステル、フッ素樹脂、シリコーン樹脂、ポリ塩化ビニル、ポリウレタン等のプラスチック、天然ゴム、ステンレス等が採用可能である。   The shaft 2 can be inserted into the blood vessel from the femoral vein via a sheath introducer (not shown), and has a hardness that does not cause damage to the blood vessel. The shaft 2 has a perfect circle shape or a shape close thereto, and the size is preferably an outer diameter of 1 to 2 mm. The shaft 2 is provided with a lumen (not shown) for sending physiological saline for inflating the balloon 1, and the number of lumens is determined as necessary. The shaft may be a double pipe provided with a guide wire lumen (not shown). As a material for forming the shaft 2, polyolefin, polyamide, polyester, fluororesin, silicone resin, polyvinyl chloride, polyurethane and other plastics, natural rubber, stainless steel, and the like can be used.

バルーン1は、血管壁に接触して血流を遮断することができる大きさまで拡張可能であり、血管の径が最大約30mmであることから、その外径は2mm〜5mmが望ましく、また、拡張時の伸びは、約5〜8倍になるものが好ましい。このようなバルーン1の形成材料としては、シリコーンゴム、ポリイソプレン等の合成ゴムや、天然ゴム等が採用可能である。
バルーン1のシャフト2への取り付けは、中空バルーン1の両端を例えばシアノアクリレート系やシリコーン系の接着剤を用いて接着することにより行うことができる。具体的には、両端の開放した中空バルーン1の一端12をシャフト2に固定した後、このバルーン1を捻ってシャフト2の周りにスクリュー状に変形させ、他端11をシャフト2に固定すれば良い。
The balloon 1 can be expanded to such a size that it can contact the blood vessel wall and block the blood flow. Since the diameter of the blood vessel is about 30 mm at the maximum, the outer diameter is preferably 2 mm to 5 mm. The elongation at time is preferably about 5 to 8 times. As a material for forming such a balloon 1, synthetic rubber such as silicone rubber or polyisoprene, natural rubber, or the like can be used.
The balloon 1 can be attached to the shaft 2 by bonding both ends of the hollow balloon 1 using, for example, a cyanoacrylate or silicone adhesive. Specifically, after fixing one end 12 of the hollow balloon 1 open at both ends to the shaft 2, the balloon 1 is twisted and deformed into a screw shape around the shaft 2, and the other end 11 is fixed to the shaft 2. good.

次に、本発明のバルーンカテーテルの使用について説明する。
図1に示すようなバルーンカテーテルを大腿静脈より挿入し、目的の血管部位へバルーン1を送り込む。位置の確認を行った後、ルーメン(図示していない)を通してバルーン1内に例えば造影剤を含んだ生理食塩水を注入して、図3のようにバルーン1の拡張を行い、血管の閉塞を行う。手技終了後、バルーン1を収縮させ、バルーンカテーテルを血管内から除去する。この時、バルーン1は、図1に示すような元のスクリュー状となる。
Next, the use of the balloon catheter of the present invention will be described.
A balloon catheter as shown in FIG. 1 is inserted from the femoral vein, and the balloon 1 is sent to a target blood vessel site. After confirming the position, for example, physiological saline containing a contrast medium is injected into the balloon 1 through a lumen (not shown), and the balloon 1 is expanded as shown in FIG. Do. After the procedure is completed, the balloon 1 is deflated and the balloon catheter is removed from the blood vessel. At this time, the balloon 1 has an original screw shape as shown in FIG.

本発明の一実施例を示す平面図である。It is a top view which shows one Example of this invention. 図1の要部の拡大図である。It is an enlarged view of the principal part of FIG. 図1においてバルーンを膨らませた状態を示す図である。It is a figure which shows the state which inflated the balloon in FIG. 従来のバルーンカテーテルを示す平面図である。It is a top view which shows the conventional balloon catheter.

符号の説明Explanation of symbols

1 バルーン
11 他端
12 一端
2 シャフト
3 ハブ
4 接続チューブ
5 二方活栓
6 注入口
1 Balloon 11 Other end 12 One end 2 Shaft 3 Hub 4 Connection tube 5 Two-way stopcock 6 Inlet

Claims (1)

約2〜5mmの外径を有する両端の開放した合成ゴムまたは天然ゴム製の中空バルーンの一端がシャフトの先端部の回りに固定され、該中空バルーンが捻られてシャフトの周りにスクリュー状に変形された状態で、他端が該シャフトに固定されてなる一時的血管閉鎖用バルーンカテーテルであって、捻られた状態で血管内に挿入され、球状に拡張状態とされた後、収縮状態として血管内から取り出され、かつ、拡張状態での外径が拡張前の外径の5〜8倍であるバルーンカテーテル。 One end of a synthetic rubber or natural rubber hollow balloon having an outer diameter of about 2 to 5 mm is fixed around the tip of the shaft, and the hollow balloon is twisted to deform into a screw around the shaft. A balloon catheter for temporary vascular closure in which the other end is fixed to the shaft with the other end fixed, inserted into the blood vessel in a twisted state, and expanded into a spherical shape, and then the blood vessel as a contracted state A balloon catheter which is taken out from the inside and whose outer diameter in the expanded state is 5 to 8 times the outer diameter before expansion.
JP2006070707A 2006-03-15 2006-03-15 Balloon catheter Expired - Fee Related JP4154617B2 (en)

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JP2006070707A JP4154617B2 (en) 2006-03-15 2006-03-15 Balloon catheter

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JP23852499A Division JP3804351B2 (en) 1999-08-25 1999-08-25 Balloon catheter

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JP2006175246A JP2006175246A (en) 2006-07-06
JP4154617B2 true JP4154617B2 (en) 2008-09-24

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