JP3026200U - Assembly of vasodilator and sheath tube - Google Patents
Assembly of vasodilator and sheath tubeInfo
- Publication number
- JP3026200U JP3026200U JP1995013592U JP1359295U JP3026200U JP 3026200 U JP3026200 U JP 3026200U JP 1995013592 U JP1995013592 U JP 1995013592U JP 1359295 U JP1359295 U JP 1359295U JP 3026200 U JP3026200 U JP 3026200U
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- Prior art keywords
- sheath tube
- vasodilator
- tube
- sheath
- dilator
- Prior art date
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Abstract
(57)【要約】
【課題】 本考案は、拡張器と鞘管の遷移部分の穿刺が
円滑にでき、しかも鞘管の外径を必要最小限に保持して
操作性が優れた血管拡張器と鞘管の組立体を実現するこ
とを目的とする。
【解決手段】 この考案は、漸拡状で長円錘形の拡張部
と拡張部に連続する均一径の直管部からなり拡張部から
直管部に移行する移行点の外周に円環状の段差による隠
蔽部を形成した厚肉中空管状の血管拡張器と、血管拡張
器の外周に抜差可能に外被され穿刺部の先端に縮径され
た先鋭部を形成した薄肉状の鞘管とを備えた合成樹脂製
の血管拡張器と鞘管の組立体であって、拡張部の終端の
外径を直管部の外径より僅に大きくして隠蔽部を微段差
状に形成し、血管拡張器と鞘管との組立状態において鞘
管の先鋭部の開口端を微段差状の隠蔽部に連接させて拡
張部から先鋭部に移る遷移部分に連続面を形成した血管
拡張器と鞘管の組立体を構成した。
(57) 【Abstract】 PROBLEM TO BE SOLVED: To provide a vascular dilator which can smoothly puncture a transition portion between a dilator and a sheath tube and which has an excellent operability by keeping the outer diameter of the sheath tube to a necessary minimum. With the aim of realizing a sheath tube assembly. According to the present invention, a circular pipe is formed on the outer periphery of a transition point at which a straight pipe portion having a gradually expanding and long conical shape and a straight pipe portion having a uniform diameter continuous with the expansion portion is formed. A thick hollow tubular vasodilator with a concealed portion formed by a step, and a thin-walled sheath tube with a sharpened tip that is removably coated on the outer periphery of the vasodilator and has a reduced diameter at the tip of the puncture portion An assembly of a vascular dilator and a sheath tube made of a synthetic resin, which comprises an outer diameter of the end of the expansion portion slightly larger than an outer diameter of the straight tube portion to form the concealing portion in a fine step shape, In the assembled state of the vascular dilator and the sheath tube, the open end of the sharpened portion of the sheath tube is connected to the concealing portion having a minute step shape, and a continuous surface is formed at the transition portion from the expanded portion to the sharpened portion, and the sheath. A tube assembly was constructed.
Description
【０００１】[0001]
本考案は、動静脈にカテーテル等を挿入する場合等に、カテーテルを体外から 血管内へ挿入する為の通路の造設および確保に用いられる血管拡張器と鞘管の組 立体に関するものである。 The present invention relates to a vascular dilator / sheath tube assembly used for constructing and securing a passage for inserting a catheter into a blood vessel from outside the body when inserting a catheter or the like into an arteriovenous vein.
【０００２】[0002]
図４と図５は従来のこの種の装置で、図４は実公昭６−３９７２３号公報に記 載の無段カテーテルイントロジューサーと特公昭４−６４７１２号公報に記載の 拡張器・鞘の組立体が示されている。 図４の段無カテーテルイントロジューサーにおいて、１Ａは血管拡張器、１Ｂ は鞘管、１Ｄは小管、１ａは長円錘部、１ｂは段差、Ｃはイントロジューサー基 である。 4 and 5 show a conventional device of this type, and FIG. 4 shows a combination of a stepless catheter introducer described in JP-B-6-39723 and a dilator / sheath described in JP-B-4-64712. A solid is shown. In the stepless catheter introducer of FIG. 4, 1A is a vasodilator, 1B is a sheath tube, 1D is a small tube, 1a is an elliptic cone portion, 1b is a step, and C is an introducer base.
【０００３】 先端が長円錘部１ａで段差１ｂを持つ血管拡張器１Ａの外側に、合成樹脂材に よる鞘管１Ｂが積重されている。血管拡張器１Ａの中央に小管１Ｄが形設され、 これらの末端はイントロジューサー基Ｃに連結されている。また、長円錘部１ａ の底辺円形と同一外径をなした鞘管１Ｂの先端部を、段差１ｂと合着させ同一水 平面を形成させて段無しとしている。つまり、長円錘部１ａと鞘管１Ｂの外径が 同一で、長円錘部１ａの外径は鞘管１Ｂの内径より大きくなっている。A sheath tube 1B made of a synthetic resin material is stacked on the outside of a vasodilator 1A having an elliptic cone portion 1a at the tip and a step 1b. A small tube 1D is formed in the center of the vasodilator 1A, and these ends are connected to an introducer group C. Further, the tip end portion of the sheath tube 1B having the same outer diameter as the bottom circular shape of the elliptic cone portion 1a is joined to the step 1b to form the same horizontal plane, which is stepless. That is, the outer diameters of the elliptic cone portion 1a and the sheath tube 1B are the same, and the outer diameter of the elliptic cone portion 1a is larger than the inner diameter of the sheath tube 1B.
【０００４】 また、図５において、２０は拡張器・鞘組立体である。２１は鞘、２２は鞘２ １の尖った先端部である。また、３０は拡張器、３１は拡張器３０の緩くテーパ している先端部、３７は拡張器３０の凹部、３６は重なり部、５０は推移部であ る。拡張器３０の外径は鞘２１の先端部２２の近くまで増加するが、鞘２１の先 端部２２の所で段を形成して縮小し、重なり部３６の下に鞘２１の先端部２２が 受容されている。また、先端部２２と凹部３７は、重なり部３６において中心軸 ４２に対して斜めになる角度４１を形成している。拡張器には３３の小管が設け られている。Further, in FIG. 5, reference numeral 20 is a dilator / sheath assembly. Reference numeral 21 is a sheath, and 22 is a pointed tip of the sheath 21. Further, 30 is a dilator, 31 is a loosely tapered tip of the dilator 30, 37 is a concave portion of the dilator 30, 36 is an overlapping portion, and 50 is a transition portion. The outer diameter of the dilator 30 increases to near the distal end 22 of the sheath 21, but a step is formed at the distal end 22 of the sheath 21 to reduce the diameter of the distal end 22 of the sheath 21 below the overlap 36. Is accepted. Further, the tip portion 22 and the concave portion 37 form an angle 41 that is oblique to the central axis 42 at the overlapping portion 36. The dilator is provided with 33 small tubes.
【０００５】 図５に示された拡張器・鞘組立体２０は、先ず、経皮ニードルが皮膚を通して カテーテルを挿入すべき動静脈等の導管に挿入される。経皮ニードルを介してガ イドワイヤが導管に差し込まれてから、ニードルが穿刺部位から抜かれてガイド ワイヤがその場所に残される。残されたガイドワイヤに、拡張器の小管、拡張器 ・鞘組立体２０が体内に挿入される。拡張器３０の体内への進行に連れて、先端 部３１のテーパにより穿刺孔は次第に拡大される。拡張器３０の体内への挿入が 終ってから、中心線軸４２の回りに鞘２１に対して引きながら相対的に捩じるこ とにより拡張器３０が鞘２１と身体から除去されるようになっている。The dilator / sheath assembly 20 shown in FIG. 5 is first inserted by a percutaneous needle through the skin into a conduit, such as an arteriovenous vein, into which a catheter is to be inserted. The guide wire is inserted into the conduit via the percutaneous needle, and then the needle is withdrawn from the puncture site, leaving the guide wire in place. The small tube of the dilator and the dilator / sheath assembly 20 are inserted into the body of the remaining guide wire. As the dilator 30 is advanced into the body, the puncture hole is gradually enlarged due to the taper of the distal end portion 31. After the dilator 30 has been inserted into the body, the dilator 30 is removed from the sheath 21 and the body by pulling about the centerline axis 42 and twisting it relative to the sheath 21. ing.
【０００６】 この外の別の従来の拡張器・鞘の組立体の２つの例が、図６と図７に示されて いる。 図６は実願平５−３２７８６号（実開平６−８３０３９マイクロフィルム）の カテーテルイントロデューサで、図７には特開平６−３３５５３１号公報に記載 のイントロデューサが示されている。 図６のカテーテルイントロデューサにおいて、３は尖端に向って薄肉で先絞り 構造としたシースのチューブである。５はダイレータの細管、５ａは尖端円錘状 部、５ｂは細管部、１５は凹状溝である。Two other examples of conventional dilator-sheath assemblies are shown in FIGS. 6 and 7. FIG. 6 shows a catheter introducer of Japanese Utility Model Application No. 5-32786 (Actual Kaihei No. 6-83039 microfilm), and FIG. 7 shows the introducer described in Japanese Patent Application Laid-Open No. 6-335531. In the catheter introducer of FIG. 6, reference numeral 3 denotes a sheath tube having a thin-walled, tapered structure toward the tip. Reference numeral 5 is a dilator thin tube, 5a is a pointed conical portion, 5b is a thin tube portion, and 15 is a concave groove.
【０００７】 この図６のカテーテルイントロデューサのチューブ３にダイレータの細管５を 挿入すると、尖端円錘状部５ａの外径がチューブ３の内径に等しいか細いから段 差が形成されずスムーズに挿通させることができる。ダイレータとシースを組付 けてジョイント部（図示してない）をロックすれば、細管５の頭出しした尖端円 錘状部５ａの基端が図６の(b) に示す如く先絞り形状のチューブ３の尖端に連続 するようになっている。When the thin tube 5 of the dilator is inserted into the tube 3 of the catheter introducer of FIG. 6, since the outer diameter of the tip conical portion 5a is equal to or smaller than the inner diameter of the tube 3, no step difference is formed and the tube is smoothly inserted. be able to. By assembling the dilator and the sheath and locking the joint (not shown), the base end of the pointed conical portion 5a of the thin tube 5 which has been projected is formed in a tapered shape as shown in FIG. 6 (b). It is designed to be continuous with the tip of the tube 3.
【０００８】 また、図７において、１はシース、２はシース１の最先端部である。４はダイ レータ、５はくぼみ部分、６はテーパ状傾斜である。シース１には伸びと歪みの 少い弾性高分子物質が用いられ、先端に向かってテーパ状に薄肉になっている。 テーパ状で薄肉の最先端部２は、ダイレータ４の外径やくぼみ部分５より小さく 作られている。図７の(b) ではダイレータ４の先端を細くし、やや離れてテーパ 状の傾斜６が形成されている。傾斜６の角度βは、シース１の先端の傾斜角度α のほぼ２倍になっている。図(a) ，(b) では共にシース１の最先端部２が、ダイ レータ４の外周に１mm以上密着している。Further, in FIG. 7, reference numeral 1 is a sheath, and 2 is a distal end portion of the sheath 1. Reference numeral 4 is a dilator, 5 is a recessed portion, and 6 is a tapered slope. The sheath 1 is made of an elastic polymer material that is less stretched and strained, and is tapered in thickness toward the tip. The tapered, thin-walled tip portion 2 is made smaller than the outer diameter of the dilator 4 and the recessed portion 5. In FIG. 7 (b), the tip of the dilator 4 is made thin, and a taper-shaped slope 6 is formed slightly apart. The angle β of the inclination 6 is almost twice the inclination angle α 2 of the tip of the sheath 1. In both figures (a) and (b), the tip 2 of the sheath 1 is in close contact with the outer periphery of the dilator 4 by 1 mm or more.
【０００９】[0009]
上記の図４の段無カテーテルイントロジューサーは、長円錘部１ａの底辺に段 差１ｂを設けて段差１ｂと同径の鞘管１Ｂを合着させている。段差１ｂが鞘管１ Ｂの内径より大きいので不具合がある。すなわち、１ｂで１Ｂを押拡げながら挿 入する必要がある。さらに、血管拡張管１Ａを引き抜くときは拡張した段差１ｂ で小さい径の鞘管１Ｂの内壁を押し広げながら引き抜くことが必要になる。 In the stepless catheter introducer of FIG. 4, the stepped portion 1b is provided on the bottom side of the elliptic cone portion 1a, and the sheath tube 1B having the same diameter as the step 1b is attached. There is a problem because the step 1b is larger than the inner diameter of the sheath tube 1B. That is, it is necessary to insert 1B while expanding 1B. Furthermore, when pulling out the blood vessel dilation tube 1A, it is necessary to pull out while expanding the inner wall of the sheath tube 1B having a small diameter with the expanded step 1b.
【００１０】 このため、血管拡張管１Ａを引き抜き始めるときに、上記のように段差１ｂと 鞘管１Ｂが同径なので不具合が発生する。引き抜きの開始時が不具合になると、 鞘管１Ｂの先端の血管内の設定位置が移動することになる。甚だしいときは、拡 張管１Ａと一緒に、鞘管１Ｂが抜け出すような虞もある。また、挿入時及び引き 抜き時の段差１ｂによる拡張で、鞘管１Ｂの先端に亀裂が生じることもある。図 ８は鞘管１Ｂを拡張器１Ａから抜いた状態を示している。図４の従来の段無カテ ーテルイントロジューサーによれば、図示のように段差１ｂで小径の鞘管１Ｂの 内壁が押し広げられる。このため、引き続いて行われるカテーテルの手技操作に 支障があるばかりか、患者に苦痛を与えることになる。Therefore, when the vasodilator 1A is started to be pulled out, a problem occurs because the step 1b and the sheath tube 1B have the same diameter as described above. If there is a problem at the start of withdrawal, the set position in the blood vessel at the tip of the sheath tube 1B will move. In extreme cases, the sheath tube 1B may come out together with the expansion tube 1A. Further, due to the expansion due to the step 1b at the time of insertion and withdrawal, a crack may occur at the tip of the sheath tube 1B. FIG. 8 shows a state in which the sheath tube 1B is pulled out from the dilator 1A. According to the conventional stepless catheter introducer of FIG. 4, the inner wall of the small-diameter sheath tube 1B is spread at the step 1b as shown in the figure. This not only hinders the subsequent catheter manipulation, but also causes pain to the patient.
【００１１】 一方、図５に示された従来の拡張器・鞘組立体は、上述のように重なり部３６ の下に形成された凹部３７に鞘２１の先端部２２が受容されて滑らかな推移部５ ０が形成されている。よって、この装置の場合も拡張器・鞘組立体２０を体内に 挿入するときに、図４のときと同様に段差に伴う患者のストレスが和らげられる 特長がある。しかし、重なり部３６が角度４１で斜めに形成されていて拡張器３ ０を引き抜くと、鞘２１の尖ったテーパの先端部２２が突出したまま血管の内部 に残されることになる。On the other hand, in the conventional dilator / sheath assembly shown in FIG. 5, the distal end portion 22 of the sheath 21 is received in the recess 37 formed under the overlapping portion 36 as described above, so that the smooth transition is achieved. The part 50 is formed. Therefore, also in the case of this device, when the dilator / sheath assembly 20 is inserted into the body, the stress of the patient due to the step is relieved as in the case of FIG. However, when the overlapping portion 36 is formed obliquely at an angle 41 and the dilator 30 is pulled out, the pointed and tapered tip portion 22 of the sheath 21 is left inside the blood vessel while protruding.
【００１２】 このため、その後の血管内に残された鞘２１を利用する手技時に、尖った先端 部２２で血管の内壁に刺激を与えて患者に不快感を与えたり、甚だしい場合は血 管内壁を傷つけたりする。また、鞘２１と拡張器３０に融点の温度差の大きい樹 脂を用いるばかりか、鞘２１の先端部２２から画成された凹部３７を形成して段 差の無い同一面にするために温度を一定以下に保持したモールド加工を行わなけ ればならないので（公報７〜８欄とFIG ４参照）、材質の選択や製造方法にも難 点があった。[0012] Therefore, during the subsequent procedure using the sheath 21 left in the blood vessel, the sharp tip 22 stimulates the inner wall of the blood vessel to cause discomfort to the patient, or in extreme cases, the inner wall of the blood vessel. To hurt. Further, not only the resin having a large difference in melting point temperature is used for the sheath 21 and the dilator 30, but also the temperature is increased in order to form the recess 37 defined by the tip 22 of the sheath 21 so as to have the same plane without any step difference. Since it is necessary to perform a molding process in which the temperature is kept below a certain level (see columns 7 to 8 of the publication and FIG. 4), there are problems in selection of the material and manufacturing method.
【００１３】 さらに、図６(a) の従来装置は前述のように尖端円錘状部５ａの外径がチュー ブ３の内径以下になっているので、円錘状部５ａをチューブ３内に挿入した場合 でも(b) のように膨らむことがなくスムースに挿通させることができる。しかし ながら、ダイレータ５の細管部５ｂにチューブ３の厚みに相当する深さの凹状溝 １５が周設され、凹状溝１５に先絞り構造のチューブ３の先端が落込むようにな っている。Further, in the conventional device of FIG. 6 (a), since the outer diameter of the pointed conical portion 5 a is equal to or smaller than the inner diameter of the tube 3 as described above, the conical portion 5 a is placed inside the tube 3. Even when inserted, it can be inserted smoothly without bulging as in (b). However, a concave groove 15 having a depth corresponding to the thickness of the tube 3 is provided around the thin tube portion 5b of the dilator 5, and the tip of the tube 3 having the pre-drawing structure is adapted to fall into the concave groove 15.
【００１４】 このため、チューブ３を通してカテーテル等を挿入する場合に必要なチューブ の内径に対して、必要以上に外径が大きくなるという不都合が生じる。この点は 、図７(a) の場合も同様である。即ち、図６(a) と図７(a) の従来装置では、挿 入カテーテルの外径に対して過大な外径のチューブを用いることになる。したが って、凹状溝１５やくぼみ部分５にチューブ３の先端を嵌入させて生体組織への 穿刺抵抗を軽減することができても、これらの従来構造では挿入すべきカテーテ ルの外径に対し過大な外径の鞘管を用いて動静脈等の穿刺孔が大きくなり、また シース本体の挿通抵抗が大きくなり組織への侵襲が甚大になるという致命的な欠 点がある。Therefore, there arises a disadvantage that the outer diameter becomes larger than necessary with respect to the inner diameter of the tube required when inserting a catheter or the like through the tube 3. This point is the same in the case of FIG. 7 (a). That is, in the conventional devices shown in FIGS. 6 (a) and 7 (a), a tube having an outer diameter larger than the outer diameter of the insertion catheter is used. Therefore, even if the distal end of the tube 3 can be fitted into the concave groove 15 or the recessed portion 5 to reduce the puncture resistance to the living tissue, the outer diameter of the catheter to be inserted in these conventional structures can be reduced. On the other hand, there is a fatal defect that a puncture hole for arteriovenous and the like becomes large by using a sheath tube with an excessively large outer diameter, and the insertion resistance of the sheath body becomes large, resulting in great invasion of tissue.
【００１５】 因みに、通常使用されている鞘管（チューブ）の肉厚は０．１〜０．３mm程度 で、平均的には０．２mm付近の肉厚の鞘管が採用されている。図６および図７の 各(a) の鞘管の肉厚および必要な内径をａおよびＤsiとしたときの構造図が、図 ９の(a) に示されている。図のように必要とする内径寸法Ｄsiに対する鞘管の外 径Ｄsoは、内径寸法Ｄsiに肉厚ａの４倍を加えた（Ｄso＝Ｄsi＋４ａ）になる。 最も好ましい形状が図(b) に示され、直管状の鞘管になる。図(a) を図(b) と比 較すると鞘管の外径が(a) の場合はＤso＝Ｄsi＋４ａで、(b) の場合はＤso＝Ｄ si＋２ａとなり肉厚ａの２倍分大きくなっている。前記の平均的な鞘管の肉厚０ ．２mmを当てはめれば寸法差が０．４mmになり、フレンチ・サイズに換算すると １．２Ｆｒに相当して無視できない程の大きな寸法になる。Incidentally, the wall thickness of a commonly used sheath tube (tube) is about 0.1 to 0.3 mm, and a sheath tube having a wall thickness of about 0.2 mm on average is adopted. A structural diagram when the wall thickness and the required inner diameter of the sheath tube of each (a) of FIGS. 6 and 7 are a and Dsi is shown in FIG. 9 (a). As shown in the figure, the outer diameter Dso of the sheath tube with respect to the required inner diameter dimension Dsi is four times the wall thickness a added to the inner diameter dimension Dsi (Dso = Dsi + 4a). The most preferred shape is shown in Figure (b), which results in a straight tubular sheath. Comparing Figure (a) with Figure (b), Dso = Dsi + 4a when the outer diameter of the sheath tube is (a), and Dso = Dsi + 2a when (b), which is twice the wall thickness a. ing. The average sheath tube wall thickness is 0. If you apply 2 mm, the dimensional difference will be 0.4 mm, which is equivalent to 1.2 Fr in terms of French size, which is too large to ignore.
【００１６】 また、図７(b) のようにダイレータ４の傾斜６とシース１の最先端２をずらせ た構成では、生体組織に刺入するときに最初にダイレータ４の傾斜６の抵抗を受 ける。傾斜６の抵抗は角度βに応じて徐々に増大するが、終端で抵抗の増加がな くなって定常状態になる。更に、刺入が進むと、シース１の最先端２から角度α の抵抗が発生して再び増加し始める。したがって、角度βと角度αの大きな刺入 抵抗を受けることになり、滑かな穿刺及び挿入という操作性が損なわれることに なる。 上述のように、図４乃至図７に挙げた従来の拡張器と鞘の組立体は、いずれも 何等かの問題点があった。Further, as shown in FIG. 7 (b), when the inclination 6 of the dilator 4 and the distal end 2 of the sheath 1 are displaced, the resistance of the inclination 6 of the dilator 4 is first received when inserting into the living tissue. Kick The resistance of the slope 6 gradually increases according to the angle β, but the resistance does not increase at the terminal end, and the steady state is reached. Further, as the puncture progresses, a resistance of the angle α 1 is generated from the distal end 2 of the sheath 1 and starts to increase again. Therefore, the puncture resistance of the angle β and the angle α is large, and the operability of smooth puncture and insertion is impaired. As described above, the conventional dilator / sheath assemblies shown in FIGS. 4 to 7 have some problems.
【００１７】 この考案は、図４〜図７に示されたような従来装置の種々の問題点を解消する ためになされたもので、拡張器と鞘管の遷移部分の穿刺が円滑にでき、しかも鞘 管の外径を必要最小限に保持して操作性が優れた血管拡張器と鞘管の組立体を実 現することを目的とするものである。The present invention has been made to solve various problems of the conventional device as shown in FIGS. 4 to 7, and can smoothly puncture the transition portion between the dilator and the sheath tube, Moreover, the object is to realize an assembly of a vascular dilator and a sheath tube which has excellent operability by keeping the outer diameter of the sheath tube to a necessary minimum.
【００１８】[0018]
この考案は、漸拡状で長円錘形の拡張部と拡張部に連続する均一径の直管部か らなり拡張部から直管部に移行する移行点の外周に円環状の段差による隠蔽部を 形成した厚肉中空管状の血管拡張器と、血管拡張器の外周に抜差可能に外被され 穿刺部の先端に縮径された先鋭部を形成した薄肉状の鞘管とを備えた合成樹脂製 の血管拡張器と鞘管の組立体であって、 拡張部の終端の外径を直管部の外径より僅に大きくして隠蔽部を微段差状に形 成し、血管拡張器と鞘管との組立状態において鞘管の先鋭部の開口端を微段差状 の隠蔽部に連接させて拡張部から先鋭部に移る遷移部分に連続面を形成した血管 拡張器と鞘管の組立体を構成したものである。 The present invention consists of a gradually expanding, long cone-shaped expansion part and a straight pipe part with a uniform diameter continuous to the expansion part, which is concealed by an annular step around the transition point where the transition from the expansion part to the straight pipe part occurs. A thick hollow tubular vasodilator with a hollow portion and a thin-walled sheath tube with a sharpened tip that is removably coated on the outer circumference of the vasodilator and has a reduced diameter at the tip of the puncture portion. An assembly of a vascular dilator and a sheath tube made of synthetic resin, in which the outer diameter at the end of the dilated portion is made slightly larger than the outer diameter of the straight tubular portion to form a concealed portion in the form of a minute step, thereby dilating the blood vessel. In the assembled state of the vessel and the sheath tube, the open end of the sharpened portion of the sheath tube is connected to the stepped concealing portion to form a continuous surface at the transition portion from the expanded portion to the sharpened portion. It is an assembly.
【００１９】 また、鞘管の先鋭部の傾斜角を血管拡張器の拡張部の傾斜角とを同一若しくは 微かに小さくして拡張部から先鋭部の外周に連続的な漸拡状の円錘面を形成した 血管拡張器と鞘管の組立体を構成したものである。 また、拡張部の終端の外径を鞘管の内径と略同一にした血管拡張器と鞘管の組 立体を構成したものである。 さらに、鞘管の内径と外径および肉厚をそれぞれＤsiとＤsoおよびａとしたと きに、該ＤsiとＤsoおよびａを下記の(1) 式の関係に選定した血管拡張器と鞘管 の組立体を構成したものである。 記 Ｄso≒Ｄsi＋２ａ …(1)Further, the inclination angle of the sharpened portion of the sheath tube is set to be the same as or slightly smaller than the inclination angle of the expanded portion of the vasodilator so that the tapered surface of the conical surface is continuously expanded from the expanded portion to the outer periphery of the sharpened portion. It is an assembly of a vascular dilator and a sheath tube that has been formed. In addition, the outer diameter of the end of the expansion portion is made substantially the same as the inner diameter of the sheath tube to form a combined body of a vascular dilator and a sheath tube. Furthermore, when the inner diameter, outer diameter, and wall thickness of the sheath tube are Dsi, Dso, and a, respectively, the Dsi, Dso, and a of the vascular dilator and the sheath tube selected in the relationship of the following equation (1). It is an assembly. Note Dso≈Dsi + 2a (1)
【００２０】[0020]
実施形態１． 以下、この考案の実施の形態を、図面を用いて説明する。 図１はこの考案の実施形態１の構成説明図、図２は図１の要部の拡大断面図で ある。 図１において、１は血管拡張器(dilator) と鞘管(sheath)の組立体である。２ は組立体１における血管拡張器、３は鞘管である。血管拡張器２と鞘管３は、共 に軟質の合成樹脂で成型されている。血管拡張器２はやや肉厚の中空管状で薄肉 の鞘管３はと組合わせ構造に作られて、鞘管３が抜差可能に血管拡張器２に外被 されている。 Embodiment 1. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration explanatory view of a first embodiment of the present invention, and FIG. 2 is an enlarged cross-sectional view of a main part of FIG. In FIG. 1, reference numeral 1 is an assembly of a vasodilator (dilator) and a sheath tube (sheath). Reference numeral 2 is a vasodilator in the assembly 1, and 3 is a sheath tube. The vasodilator 2 and the sheath tube 3 are both molded from soft synthetic resin. The vasodilator 2 is made of a combination of a slightly thick hollow tube and a thin sheath tube 3, and the sheath tube 3 is detachably covered with the vasodilator 2.
【００２１】 組立体１に使われる樹脂材には、例えばポリアミド樹脂、ナイロン・エストラ マーが用いられて部材間の色分けができるように着色剤で薄く着色され、硫酸バ リウム（ＢａＳＯ4 ）や酸化ビスマス等のＸ線造影剤が含有されている。 このほか、樹脂材として下記のような材質もある。 ポリオレフィン樹脂（ポリエチレン・ポリプロピレン） フッ素系樹脂（ＥＴＦＥ…エチレン・四フッ化エチレン共重合体、 ＰＦＡ…四フッ化エチレン・パークロロアルキルビニルエーテル共重合体） ポリウレタン樹脂The resin material used in the assembly 1 is, for example, a polyamide resin or nylon elastomer, which is lightly colored with a coloring agent so that the members can be color-coded, and barium sulfate (BaSO 4) or bismuth oxide is used. X-ray contrast agent is contained. In addition, the following resin materials are also available. Polyolefin resin (polyethylene / polypropylene) Fluorine resin (ETFE ... ethylene / tetrafluoroethylene copolymer, PFA ... tetrafluoroethylene / perchloroalkyl vinyl ether copolymer) Polyurethane resin
【００２２】 ４は血管拡張器２の先端に漸拡状に形成された長円錘形の拡張部、５は拡張部 ４に連続する均一径の直管部、６は手元側に設けられた把持部である。また、７ と８は鞘管３の穿刺部と連結部である。血管拡張器２の直管部５と鞘管３の先端 を除く穿刺部７はほぼ均一な太さに形成され、直管部５が穿刺部７に僅かな隙間 δ（図２）を空けて抜差可能に嵌め合わされている。そして、血管拡張器２と鞘 管３の組立て状態で、拡張部４が先端に露出している。９は把持部６に設けられ た冠着部、１０と１１および１２は鞘管３の筒状部と弁および枝管である。弁１ １は血液等の逆流を防止し、枝管１２は薬液類の補給等に利用される。Reference numeral 4 denotes an elliptic cone-shaped expansion portion formed at the tip of the vasodilator 2 in a gradually expanding shape, 5 is a straight pipe portion having a uniform diameter continuous with the expansion portion 4, and 6 is provided on the proximal side. It is a gripping part. Further, 7 and 8 are a puncture portion and a connecting portion of the sheath tube 3. The straight tube portion 5 of the vasodilator 2 and the puncture portion 7 excluding the tip of the sheath tube 3 are formed to have a substantially uniform thickness, and the straight tube portion 5 leaves a slight gap δ (Fig. 2) in the puncture portion 7. It is fitted so that it can be removed. In the assembled state of the blood vessel dilator 2 and the sheath tube 3, the dilated portion 4 is exposed at the tip. Reference numeral 9 denotes a crowned portion provided on the grip portion 6, 10 and 11 and 12 denote a tubular portion of the sheath tube 3, a valve and a branch pipe. The valve 11 prevents backflow of blood and the like, and the branch pipe 12 is used for replenishing chemicals and the like.
【００２３】 １３は冠着部９の内周面に設けられた突条、１４は筒状部１０側の外周に形成 された凹溝である。冠着部９を筒状部１０に冠着して組立体１を組み立てると、 突条１３と凹溝１４が係合して血管拡張器２と鞘管３が一体に係留されて軸方向 の移動と回転が拘束されるようになっている。また、この組立状態において、把 持部６の端部付近を矢印ａのような遠心方向の力を加えれば、冠着部９が弾性的 に変形して突条１３と凹溝１４との係合が解除されて血管拡張器２と鞘管３が機 械的に分離される。Reference numeral 13 is a protrusion provided on the inner peripheral surface of the crown attachment portion 9, and 14 is a concave groove formed on the outer periphery of the tubular portion 10 side. When the assembly 1 is assembled by crowning the crown portion 9 to the tubular portion 10, the ridge 13 and the groove 14 are engaged with each other, and the vascular dilator 2 and the sheath tube 3 are integrally anchored so that the axial direction Movement and rotation are restricted. Further, in this assembled state, if a force in the centrifugal direction as indicated by arrow a is applied to the vicinity of the end portion of the grip portion 6, the crown attachment portion 9 is elastically deformed and the engagement between the ridge 13 and the groove 14 is increased. Then, the vasodilator 2 and the sheath tube 3 are mechanically separated from each other.
【００２４】 組立状態における組立体１の先端付近の拡大図が、図２に示されている。１５ は鞘管３の先端の尖鋭部、１６は血管拡張器２に形成された隠蔽部である。尖鋭 部１５の先端の開口端１７は小円弧状に丸められ、僅かに縮径されて弾性が付与 されている。また、先鋭部１５の終端の大径部には大きな円弧面が形成されて、 先鋭部１５の円筒面がなだらかに外径が均一な穿刺部７に移行している（図３も 参照）。An enlarged view of the vicinity of the tip of the assembly 1 in the assembled state is shown in FIG. Reference numeral 15 is a sharp portion at the tip of the sheath tube 3, and 16 is a concealing portion formed in the vasodilator 2. The open end 17 at the tip of the sharpened portion 15 is rounded into a small arc shape and slightly reduced in diameter to impart elasticity. In addition, a large arc surface is formed on the large-diameter portion at the end of the sharpened portion 15, and the cylindrical surface of the sharpened portion 15 transitions to the puncture portion 7 having a gentle outer diameter (see also FIG. 3).
【００２５】 一方、血管拡張器２の拡張部４の終端の外径Ｄ（最大径）は図２に示されたよ うに、直管部５の外径Ｄ1 はより僅に大きく作られている。このため、長円錘形 の拡張部４から小径の直管部５に移行する断面矢尻状の付根の位置に、薄円環状 の微段差からなる隠蔽部１６が形成されている。そして、血管拡張器２の拡張部 ４と鞘管３の先鋭部１５は同一の傾斜角θで傾斜していて、拡張部４から先鋭部 １５の外周に連続的な漸拡状の円錘面が形成されている。連続的な円錘面上の途 中の遷移部分では、鞘管３の開口端１７が直管部５の外周に圧着しながら微段差 の隠蔽部１６内に隠蔽されている。On the other hand, as shown in FIG. 2, the outer diameter D (maximum diameter) of the end of the expanded portion 4 of the blood vessel dilator 2 is made slightly larger than the outer diameter D1 of the straight pipe portion 5. For this reason, a concealing portion 16 composed of a thin annular fine step is formed at the position of the root having an arrow-shaped cross section that transitions from the elliptic cone-shaped expansion portion 4 to the small diameter straight pipe portion 5. The expanded portion 4 of the blood vessel dilator 2 and the sharpened portion 15 of the sheath tube 3 are inclined at the same inclination angle θ, and a continuous graduated conical surface is formed from the expanded portion 4 to the outer periphery of the sharpened portion 15. Are formed. At an intermediate transitional portion on the conical surface, the open end 17 of the sheath pipe 3 is concealed in the concealing portion 16 having a slight step while being crimped to the outer periphery of the straight pipe portion 5.
【００２６】 図２のＬ1 とＬ2 は拡張部４と先鋭部１５のそれぞれの水平長さ、ＬはＬ1 と Ｌ2 の和である。なお、前記のように鞘管３の先鋭部１５の縮径された開口端１ ７には適度な弾性が与えられているので、血管拡張器２の抜差動作で膨出した隠 蔽部１６付近の形状の変化に追随してヒビ割れ等が生じないようになっている。 この結果、血管拡張器２側の拡張部４と鞘管３側の先鋭部１５の嵌合構造により 、後述の血管拡張器２による拡張操作と引抜き操作が円滑に行なわれる。In FIG. 2, L1 and L2 are horizontal lengths of the expansion portion 4 and the sharpened portion 15, respectively, and L is the sum of L1 and L2. As described above, since the reduced-diameter open end 17 of the sharpened portion 15 of the sheath tube 3 is provided with appropriate elasticity, the concealing portion 16 that bulges due to the slipping action of the vasodilator 2. It is designed so that cracks and the like do not occur following changes in the shape in the vicinity. As a result, due to the fitting structure of the expanded portion 4 on the side of the blood vessel dilator 2 and the sharpened portion 15 on the side of the sheath tube 3, the dilation operation and the withdrawal operation by the blood vessel dilator 2 described later are smoothly performed.
【００２７】 上記のような構成の本考案の実施の形態１において、その動作を説明すれば次 の通りである。 予め、注射器の注射針にガイドワイヤが挿通されて、先端を皮下の血管の所定 位置に到達させたガイドワイヤの他端が皮膚外に導出される。皮膚の外に導出さ れたガイドワイヤの先が血管拡張器２と鞘管３とを係留させた組立体１に挿入さ れて、このガイドワイヤをガイドにして皮膚の穿刺孔に組立体１の拡張部４の血 管への穿刺が開始されることになる。The operation of the first embodiment of the present invention having the above-described configuration will be described below. In advance, a guide wire is inserted through the injection needle of the syringe, and the other end of the guide wire whose tip has reached a predetermined position in the subcutaneous blood vessel is led out of the skin. The tip of the guide wire led out of the skin is inserted into the assembly 1 in which the vasodilator 2 and the sheath tube 3 are anchored, and the assembly 1 is inserted into the skin puncture hole using the guide wire as a guide. Puncture of the expanded portion 4 into the blood vessel is started.
【００２８】 血管拡張器２の先端の穿刺孔への穿刺が始まると、侵入した拡張部４の先端や 周辺には常に皮膚内細胞の収縮力が加えられる。しかしながら、血管拡張器２の 拡張部４と鞘管３の先鋭部１５には弱い傾斜角θのテーパが形成されているので 、これらの傾斜角θに沿って拡張部４と先鋭部１５が徐々に穿刺孔を押し拡げな がら抵抗なく皮膚内に侵入する。特に、前記のように先鋭部１５の開口端１７は 隠蔽部１６の陰に隠れてほぼ連続した円錘面を形成しているので、隠蔽部１６の 付近に殆ど局部的な抵抗を受けることなく通過してからなだらかな肩部を経て穿 刺部７が円滑に挿入される。When puncturing of the puncture hole at the tip of the vasodilator 2 is started, the contracting force of the cells in the skin is always applied to the tip and the periphery of the invading expansion part 4. However, since the taper having the weak inclination angle θ is formed on the expanded portion 4 of the vascular dilator 2 and the sharpened portion 15 of the sheath tube 3, the expanded portion 4 and the sharpened portion 15 are gradually tapered along the inclined angle θ. While pushing the puncture hole into the skin, it penetrates into the skin without resistance. In particular, as described above, since the open end 17 of the sharpened portion 15 is hidden behind the concealing portion 16 and forms a substantially continuous conical surface, there is almost no local resistance in the vicinity of the concealing portion 16. After passing, the puncture portion 7 is smoothly inserted through the gentle shoulder portion.
【００２９】 皮膚の穿刺孔から挿入された拡張部４が血管内に導入されてから、鞘管３の開 口端１７が血管の所定の位置に達したときに挿入が停止される。挿入が停止され ると、血管拡張器２の把持部６を矢印ａのように遠心方向に傾けて血管拡張器２ と鞘管３のロックを解除する。そして、鞘管３側を固定しておいて、血管拡張器 ２の把持部６側を一定の角範囲を反転回動させながら引き抜きが始められる。こ の結果、血管拡張器２が鞘管３から引き抜かれることになる。図３の(a) ，(b) ，(c) の各図に、引き抜き開始後の３態態が示されている。After the expanded portion 4 inserted through the puncture hole in the skin is introduced into the blood vessel, the insertion is stopped when the open end 17 of the sheath tube 3 reaches a predetermined position in the blood vessel. When the insertion is stopped, the grip portion 6 of the vasodilator 2 is tilted in the centrifugal direction as indicated by the arrow a to unlock the vasodilator 2 and the sheath tube 3. Then, with the sheath tube 3 side fixed, the gripping portion 6 side of the vascular dilator 2 can be pulled out while reversing and rotating a certain angular range. As a result, the vasodilator 2 is pulled out from the sheath tube 3. 3A, 3B, and 3C show the three states after the start of extraction.
【００３０】 血管拡張器２の引抜きが開始すると(a) のように、拡張部４の前述のような引 抜力を伴う反転する回動動作で、隠蔽部１６により鞘管３の先鋭部１５の開口端 １７が弾性的に僅かに押し拡げられる。隠蔽部１６が引かれて開口端１７を通過 すると、弾性を有する開口端１７が縮小して原形に復元する〔(a) ，(b) 〕。そ して、そのまま、拡張部４が鞘管３側の穿刺部７を経て、人体外に固定された連 結部８から外に引き抜かれる。この場合、隠蔽部１６は微段差で凹凸が少ないの で、抵抗力が弱く血管拡張器２を容易に引抜くことができる。その後、静脈に留 置されている鞘管３を利用して、カテーテルによる経皮的な処置がなされるよう になっている。When the withdrawal of the vascular dilator 2 is started, as shown in (a), the convoluted portion 16 causes the sharpened portion 15 of the sheath tube 3 by the reversing rotational movement of the expanded portion 4 accompanied by the above-mentioned withdrawal force. The open end 17 is elastically slightly expanded. When the concealing portion 16 is pulled and passes through the opening end 17, the elastic opening end 17 contracts and restores its original shape [(a), (b)]. Then, as it is, the expanded portion 4 passes through the puncture portion 7 on the sheath tube 3 side and is pulled out from the connection portion 8 fixed to the outside of the human body. In this case, since the concealing portion 16 has a minute step and has few irregularities, the resistance is weak and the vasodilator 2 can be easily pulled out. After that, a percutaneous treatment with a catheter is performed using the sheath tube 3 left in the vein.
【００３１】 因みに、本考案の実施形態の仕様を示せば、次の通りである。 血管拡張器の構造（単位：mm） サイズ（種類） ４Ｆｒ ９Ｆｒ １２Ｆｒ 外径 １．４５ ３．１０ ４．００ 内径 １．００ １．２０ １．２０ Ｌ1 ５．０ ２５．０ ３２．００ 傾斜角θ ２°３０′ ただし、θ＝６°でも使用可能である。θが途中で変化し、 θ＝２°３０′と３°の多段階型もある。Incidentally, the specifications of the embodiment of the present invention are as follows. Structure of vascular dilator (unit: mm) Size (type) 4Fr 9Fr 12Fr Outer diameter 1.45 3.10 4.00 Inner diameter 1.00 1.20 1.20 L1 5.0 25.0 32.00 Inclination angle θ 2 ° 30 ′ However, it is also possible to use θ = 6 °. There is also a multi-stage type in which θ changes in the middle and θ = 2 ° 30 'and 3 °.
【００３２】 鞘管の構造（単位：mm） サイズ（種類） ４Ｆｒ ９Ｆｒ １２Ｆｒ 外径 １．８０ ３．６５ ４．６０ 内径 １．５０ ３．１５ ４．１０ 肉厚 ０．１５ ０．２５ ０．２５ 血管拡張器・鞘管の硬さ（各材質の引張り弾性強度） ナイロンエラストマー ４０〜４２ Kgf ／mm2 ＥＴＦＥ ７６〜７７ 〃 ポリプロピレン １１０〜１４０ 〃 ナイロン６１０ １１２〜１４０ 〃Structure of sheath tube (unit: mm) Size (type) 4Fr 9Fr 12Fr outer diameter 1.80 3.65 4.60 inner diameter 1.50 3.15 4.10 wall thickness 0.15 0.25 0. 25 Hardness of vascular dilator / sheath tube (tensile elastic strength of each material) Nylon elastomer 40-42 Kgf / mm 2 ETFE 76-77 〃 Polypropylene 110-140 〃 Nylon 610 112-140 〃
【００３３】 なお、上述の本考案の実施の形態では血管拡張器と鞘管に同一の樹脂材を用い た場合を例示して説明したが、異材質の場合にも本考案を適用することができる 。さらに、血管拡張器を反転回動させて引抜く場合で説明したが、緩やかな螺旋 回転を加えてもよく、血管拡張器の把持部や鞘管の円筒部の構造や形状も必ずし も実施例に限定するものではない。In the above-described embodiment of the present invention, the case where the same resin material is used for the vasodilator and the sheath tube has been described as an example, but the present invention can be applied to the case of different materials. it can . Furthermore, although the explanation has been given on the case where the vasodilator is rotated in the reverse direction and pulled out, a gentle spiral rotation may be applied, and the structure and shape of the grip portion of the vasodilator and the cylindrical portion of the sheath tube must be performed without fail. It is not limited to the example.
【００３４】[0034]
この考案は、漸拡状で長円錘形の拡張部と拡張部に連続する均一径の直管部か らなり拡張部から直管部に移行する移行点の外周に円環状の段差による隠蔽部を 形成した厚肉中空管状の血管拡張器と、血管拡張器の外周に抜差可能に外被され 穿刺部の先端に縮径された先鋭部を形成した薄肉状の鞘管とを備えた合成樹脂製 の血管拡張器と鞘管の組立体であって、 拡張部の終端の外径を直管部の外径より僅に大きくして隠蔽部を微段差状に形 成し、血管拡張器と鞘管との組立状態において鞘管の先鋭部の開口端を微段差状 の隠蔽部に連接させて拡張部から先鋭部に移る遷移部分に連続面を形成した血管 拡張器と鞘管の組立体を構成した。 The present invention consists of a gradually expanding, long cone-shaped expansion part and a straight pipe part with a uniform diameter continuous to the expansion part, which is concealed by an annular step around the transition point where the transition from the expansion part to the straight pipe part occurs. A thick hollow tubular vasodilator with a hollow portion and a thin-walled sheath tube with a sharpened tip that is removably coated on the outer circumference of the vasodilator and has a reduced diameter at the tip of the puncture portion. An assembly of a vascular dilator and a sheath tube made of synthetic resin, in which the outer diameter at the end of the dilated portion is made slightly larger than the outer diameter of the straight tubular portion to form a concealed portion in the form of a minute step, thereby dilating the blood vessel. In the assembled state of the vessel and the sheath tube, the open end of the sharpened portion of the sheath tube is connected to the stepped concealing portion to form a continuous surface at the transition portion from the expanded portion to the sharpened portion. The assembly was constructed.
【００３５】 また、鞘管の先鋭部の傾斜角を血管拡張器の拡張部の傾斜角とを同一若しくは 微かに小さくして拡張部から先鋭部の外周に連続的な漸拡状の円錘面を形成した 血管拡張器と鞘管の組立体を構成した。 また、拡張部の終端の外径を鞘管の内径と略同一にした血管拡張器と鞘管の組 立体を構成した。 さらに、鞘管の内径と外径および肉厚をそれぞれＤsiとＤsoおよびａとしたと きに、該ＤsiとＤsoおよびａを下記の(1) 式の関係に選定した血管拡張器と鞘管 の組立体を構成した。 記 Ｄso≒Ｄsi＋２ａ …(1)Further, the inclination angle of the sharpened portion of the sheath tube is set to be the same as or slightly smaller than the inclination angle of the expanded portion of the vascular dilator so that the tapered surface of the conical surface is continuously expanded from the expanded portion to the outer periphery of the sharpened portion. A vascular dilator and sheath tube assembly was formed. In addition, the outer diameter of the end of the expansion section was made to be approximately the same as the inner diameter of the sheath tube to form a combined body of a vascular dilator and a sheath tube. Furthermore, when the inner diameter, outer diameter, and wall thickness of the sheath tube are Dsi, Dso, and a, respectively, the Dsi, Dso, and a of the vascular dilator and the sheath tube selected in the relationship of the following equation (1). The assembly was constructed. Note Dso≈Dsi + 2a (1)
【００３６】 この結果、従来のように血管拡張管を引き抜き始めるときの不具合がなくなり 、鞘管の先端の血管内の設定位置が移動するようなこともない。また、血管拡張 器と一緒に鞘管が抜け出すような虞もなく、引き抜き時の段差で鞘管の先端に亀 裂が生じるようなこともない。また、図５の従来の血管拡張器・鞘管組立体のよ うに重なり部が斜めに形成されていて鞘管の尖ったテーパの先端部が突出してい ないので、血管内壁に損傷を与えるようなこともなくなる。また、鞘管と血管拡 張器の材質の選択や製造方法にも難点がなく、普通の樹脂成型機で容易に製造す ることもできる。As a result, there is no problem when starting to pull out the vasodilation tube as in the conventional case, and the set position in the blood vessel at the tip of the sheath tube does not move. Also, there is no risk that the sheath tube will come out together with the vasodilator, and there will be no cracking at the tip of the sheath tube due to the step at the time of withdrawal. Also, as in the conventional vasodilator / sheath tube assembly shown in FIG. 5, the overlapping portion is formed obliquely and the sharp tapered tip of the sheath tube does not project, which may cause damage to the inner wall of the blood vessel. Things will disappear. In addition, there is no difficulty in selecting the material for the sheath tube and the blood vessel dilator and the manufacturing method, and the resin can be easily manufactured by an ordinary resin molding machine.
【００３７】 よって、本考案によれば、拡張器と鞘管の遷移部分の穿刺が円滑にでき、しか も鞘管の外径を必要最小限に保持して操作性が優れた血管拡張器と鞘管の組立体 を提供することができる。Therefore, according to the present invention, it is possible to smoothly puncture the transition portion between the dilator and the sheath tube, and to maintain the outer diameter of the sheath tube to the necessary minimum and to provide a vasodilator with excellent operability. An assembly of sheath tubes can be provided.
【図１】この考案の実施形態１の構成説明図である。FIG. 1 is a configuration explanatory diagram of a first embodiment of the present invention.
【図２】図１の要部の断面図である。FIG. 2 is a sectional view of a main part of FIG.
【図３】この考案の実施の形態１の動作説明図である。FIG. 3 is an operation explanatory diagram of the first embodiment of the present invention.
【図４】従来装置１の要部の構成を示す断面図である。FIG. 4 is a cross-sectional view showing a configuration of a main part of a conventional device 1.
【図５】従来装置２の要部の構成を示す断面図である。FIG. 5 is a cross-sectional view showing a configuration of a main part of a conventional device 2.
【図６】従来装置３の要部の構成を示す断面図である。FIG. 6 is a cross-sectional view showing a configuration of a main part of a conventional device 3.
【図７】従来装置４の要部の構成を示す断面図である。FIG. 7 is a cross-sectional view showing a configuration of a main part of a conventional device 4.
【図８】従来装置１，２の動作を示す断面図である。FIG. 8 is a cross-sectional view showing the operation of conventional devices 1 and 2.
【図９】従来装置３，４の構造を説明するための拡大断
面図である。FIG. 9 is an enlarged cross-sectional view for explaining the structures of conventional devices 3 and 4.
１ 組立体、２ 血管拡張器、３ 鞘管、４ 拡張部、
５ 直管部、６ 把持部、７ 穿刺部、８ 連結部、９
冠着部、１０ 筒状部、１５ 先鋭部、１６隠蔽部、
１７ 開口端、ａ 鞘管の肉厚、Ｄ 血管拡張器の外径
（最大径）、Ｄ1 直管部の外径、Ｄsi 鞘管の内径、
Ｄso 鞘管の外径、Ｌ1 拡張部の水平長さ、Ｌ2 先
鋭部の水平長さ、θ 傾斜角。1 assembly, 2 vascular dilator, 3 sheath tube, 4 dilation,
5 straight pipe part, 6 gripping part, 7 puncturing part, 8 connecting part, 9
Crown part, 10 tubular part, 15 sharpened part, 16 concealed part,
17 Open end, a Sheath tube wall thickness, D Vessel dilator outer diameter (maximum diameter), D1 straight tube portion outer diameter, Dsi sheath tube inner diameter,
Dso sheath tube outer diameter, L1 extension horizontal length, L2 sharp tip horizontal length, θ tilt angle.
Claims (4)
連続する均一径の直管部からなり前記拡張部から直管部
に移行する移行点の外周に円環状の段差による隠蔽部を
形成した厚肉中空管状の血管拡張器と、該血管拡張器の
外周に抜差可能に外被され穿刺部の先端に縮径された先
鋭部を形成した薄肉状の鞘管とを備えた合成樹脂製の血
管拡張器と鞘管の組立体であって、 前記拡張部の終端の外径を直管部の外径より僅に大きく
して前記隠蔽部を微段差状に形成し、前記血管拡張器と
鞘管との組立状態において鞘管の先鋭部の開口端を前記
微段差状の隠蔽部に連接させて前記拡張部から先鋭部に
移る遷移部分に連続面を形成したことを特徴とする血管
拡張器と鞘管の組立体。1. An annular step is formed on the outer periphery of a transition point at which a transition is made from the expanded section to the straight tube section, the expansion section having a gradually expanding and elongated conical shape and the straight tube section having a uniform diameter continuous with the expanded section. A thick hollow tubular vasodilator in which a concealing portion is formed, and a thin-walled sheath tube in which a sharpened portion having a reduced diameter is formed at the tip of the puncture portion that is detachably covered on the outer periphery of the vasodilator. An assembly of a vascular dilator and a sheath tube made of a synthetic resin, comprising: an outer diameter of a terminal end of the expanded portion slightly larger than an outer diameter of a straight tube portion to form the concealed portion in a minute step shape. Then, in the assembled state of the vascular dilator and the sheath tube, the open end of the sharpened portion of the sheath tube is connected to the fine step-shaped concealing portion to form a continuous surface at the transition portion from the expanded portion to the sharpened portion. An assembly of a vasodilator and a sheath tube, which is characterized in that:
の拡張部の傾斜角とを同一若しくは微かに小さくして前
記拡張部から先鋭部の外周に連続的な漸拡状の円錘面を
形成したことを特徴とする請求項１に記載の血管拡張器
と鞘管の組立体。2. A continuous graduated circle extending from the expanded portion to the outer periphery of the sharpened portion by making the inclination angle of the sharpened portion of the sheath tube equal to or slightly smaller than the inclination angle of the expanded portion of the vasodilator. The vasodilator / sheath tube assembly according to claim 1, wherein a weight surface is formed.
略同一にしたことを特徴とする請求項１または２に記載
の血管拡張器と鞘管の組立体。3. The vascular dilator / sheath tube assembly according to claim 1, wherein the outer diameter of the end of the expansion portion is substantially the same as the inner diameter of the sheath tube.
管部の外径および肉厚をそれぞれＤsiとＤsoおよびａと
したときに、該ＤsiとＤsoおよびａを下記の(1) 式の関
係に選定したことを特徴とする請求項１乃至３のいずれ
かに記載の血管拡張器と鞘管の組立体。 記 Ｄso≒Ｄsi＋２ａ …(1)4. When the inner diameter of the reduced sharpened portion of the sheath tube and the outer diameter and wall thickness of the straight pipe portion are Dsi, Dso and a, respectively, the Dsi, Dso and a are expressed by the following (1 ) The assembly of a vasodilator and a sheath tube according to any one of claims 1 to 3, wherein the assembly is selected according to the formula (4). Note Dso≈Dsi + 2a (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1995013592U JP3026200U (en) | 1995-12-22 | 1995-12-22 | Assembly of vasodilator and sheath tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1995013592U JP3026200U (en) | 1995-12-22 | 1995-12-22 | Assembly of vasodilator and sheath tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP3026200U true JP3026200U (en) | 1996-07-02 |
Family
ID=43161374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1995013592U Expired - Lifetime JP3026200U (en) | 1995-12-22 | 1995-12-22 | Assembly of vasodilator and sheath tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3026200U (en) |
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