JP5687439B2 - needle - Google Patents
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- JP5687439B2 JP5687439B2 JP2010119634A JP2010119634A JP5687439B2 JP 5687439 B2 JP5687439 B2 JP 5687439B2 JP 2010119634 A JP2010119634 A JP 2010119634A JP 2010119634 A JP2010119634 A JP 2010119634A JP 5687439 B2 JP5687439 B2 JP 5687439B2
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Description
本発明は、皮膚から皮下の血管に通じる穿刺ルートに挿入されて、血管に穿刺される針に関する。 The present invention relates to a needle that is inserted into a puncture route leading from a skin to a subcutaneous blood vessel and punctured into a blood vessel.
例えば透析処理などの血液浄化処理を行う際には、患者の皮膚を貫いて、血管に針を刺し、当該針から採血と返血が行われている。この穿刺は、血液浄化処理時に毎回行う必要があるが、その都度患者に大きな痛みを与える。そこで、近年では、穿刺時の痛みを軽減するために、初回の穿刺時に鋭利な通常針を穿刺して、例えば図９に示すように体の皮膚１００から血管１０１に通じる穿刺ルート１０２を形成し、２回目以降の穿刺時には、痂皮１０３を取り除き、鋭利性が低いダルニードルを穿刺ルート１０２に挿入して血管１０１に穿刺する、いわゆるボタンホール穿刺法が用いられている（特許文献１参照）。この方法によれば、２回目以降の穿刺で新たに皮膚１００に穴を空ける必要がないので、患者の痛みが軽減される。一般的に、図１０に示すように通常針１１０の先端には、尖った刃面１１０ａが形成されており、図１１に示すようにダルニードル１２０の先端は、管状の端部を斜めに切断して形成された傾斜端面１２０ａを有し、先端に丸みがある。 For example, when blood purification treatment such as dialysis treatment is performed, a needle is inserted into a blood vessel through a patient's skin, and blood is collected and returned from the needle. This puncture needs to be performed every time during the blood purification process, but each time it gives great pain to the patient. Therefore, in recent years, in order to reduce pain at the time of puncture, a sharp normal needle is punctured at the first puncture to form a puncture route 102 that leads from the body skin 100 to the blood vessel 101 as shown in FIG. At the second and subsequent punctures, a so-called buttonhole puncture method is used in which the crust 103 is removed, and a dull needle with low sharpness is inserted into the puncture route 102 to puncture the blood vessel 101 (see Patent Document 1). According to this method, since it is not necessary to make a new hole in the skin 100 for the second and subsequent punctures, the pain of the patient is reduced. Generally, a sharp blade surface 110a is formed at the tip of the normal needle 110 as shown in FIG. 10, and the tip of the dull needle 120 is cut obliquely at the tubular end as shown in FIG. And has a rounded end.
ところで、上述のボタンホール穿刺法において、図１２に示すように初回の穿刺時に開けられた血管１０１の表面の穿刺孔１０１ａはU字型であり、当該穿刺孔１０１ａには、次に穿刺する際の起点となる穿刺起点部１０４が形成されている。２回目以降の穿刺時には、この穿刺起点部１０４にダルニードル１２０の先端を合わせて押圧することにより、適切に穿刺孔１０１ａが開きダルニードル１２０を血管１０１内に挿入できる。このダルニードル１２０の先端を穿刺起点部１０４に合わせる作業は、作業者が指先の感覚を頼りに、ダルニードル１２０の先端で穿刺起点部１０４を探ることで行われている。 By the way, in the above-described buttonhole puncture method, as shown in FIG. 12, the puncture hole 101a on the surface of the blood vessel 101 opened at the time of the first puncture is U-shaped, and the puncture hole 101a is next punctured. A puncture starting point portion 104 is formed as a starting point. In the second and subsequent punctures, the puncture hole 101a is appropriately opened and the dull needle 120 can be inserted into the blood vessel 101 by aligning and pressing the tip of the dull needle 120 to the puncture starting point 104. The operation of aligning the tip of the dull needle 120 with the puncture starting point 104 is performed by the operator searching the puncture starting point 104 with the tip of the dull needle 120 depending on the sense of the fingertip.
しかしながら、上述のダルニードル１２０では、血管の感触が指先に伝わり難く探り性が十分でない。このため、例えばダルニードル１２０を穿刺ルート１０２に複数回入れ直したりして、血管の穿刺起点部１０４を探り当てるのに時間がかかり、穿刺に時間がかかる。また、血管の穿刺起点部１０４の探りが上手くいかないと、穿刺時により大きな力を加える必要があり、これにより例えば血管を傷付けたり患者に痛みを与えることがある。時間をかけずに小さな力で血管に穿刺するには、経験や技術が必要になる。 However, in the above-described dull needle 120, the feel of the blood vessel is not easily transmitted to the fingertip, and the exploration property is not sufficient. For this reason, for example, it takes time to reinsert the dull needle 120 into the puncture route 102 and find the puncture start point 104 of the blood vessel, which takes time. Also, if the blood vessel puncture starting point 104 is not well searched, it is necessary to apply a greater force during puncture, which may damage the blood vessel or cause pain to the patient, for example. To puncture a blood vessel with a small force without taking time, experience and skill are required.
本発明は、かかる点に鑑みてなされたものであり、穿刺ルートを通じて血管に穿刺する際の穿刺起点部に対する針の探り性を向上することをその目的とする。 The present invention has been made in view of such a point, and an object thereof is to improve the probeability of a needle with respect to a puncture starting point when puncturing a blood vessel through a puncture route.
上記目的を達成する本発明は、皮膚から皮下の血管に通じる穿刺ルートに挿入されて、血管に穿刺される針であって、針の軸に対し傾斜した平面状の傾斜端面を有する管状部と、当該管状部の傾斜端面の先端から前方側に突出した突出部と、を有し、前記突出部の内壁面は、前記管状部の内壁面に連続し、前記突出部の外壁面は、前記管状部の外壁面に連続しており、前記突出部の先端は、前記管状部よりも幅が小さく、前方に凸に湾曲している。 The present invention that achieves the above object is a needle that is inserted into a puncture route leading from a skin to a subcutaneous blood vessel and pierced into a blood vessel, and has a tubular portion having a flat inclined end surface that is inclined with respect to the axis of the needle; A protruding portion protruding forward from the tip of the inclined end surface of the tubular portion, the inner wall surface of the protruding portion is continuous with the inner wall surface of the tubular portion, and the outer wall surface of the protruding portion is the It is continuous with the outer wall surface of the tubular part, and the tip of the protruding part is smaller in width than the tubular part and is curved convexly forward.
本発明によれば、管状部の傾斜端面の先端から前方に突出し先端が管状部よりも幅の小さい突出部を有するので、当該突出部により血管の感触が指に伝わり易くなり、血管の穿刺起点部に対する針の探り性を向上できる。よって、血管に穿刺する作業を簡単かつ短時間で行うことができる。また、突出部の先端が前方に凸に湾曲しているので、突出部の先端により血管を傷つけたり患者に痛みを与えることを防止できる。 According to the present invention, the protruding portion has a protruding portion that protrudes forward from the tip of the inclined end surface of the tubular portion, and the tip has a width smaller than that of the tubular portion. The searchability of the needle to the part can be improved. Therefore, the work of puncturing a blood vessel can be performed easily and in a short time. Moreover, since the front-end | tip of a protrusion part is curving convexly ahead, it can prevent damaging a blood vessel with a front-end | tip of a protrusion part, or giving a pain to a patient.
前記突出部の先端の曲率半径は、前記傾斜端面の先端の曲率半径よりも小さくなっていてもよい。かかる場合、突出部の先端による血管の感触がより指先に伝わり易くなり、血管の穿刺起点部に対する針の探り性をさらに向上できる。 The radius of curvature of the tip of the protruding portion may be smaller than the radius of curvature of the tip of the inclined end surface. In this case, the feel of the blood vessel due to the tip of the protruding portion is more easily transmitted to the fingertip, and the probeability of the needle with respect to the puncture starting point of the blood vessel can be further improved.
前記突出部の突出方向に対する傾斜端面の傾斜角度が６０度未満になっていてもよい。かかる場合、穿刺する際の針の抵抗が小さくなるので、より小さな力で針を血管に穿刺できる。 The inclination angle of the inclined end surface with respect to the protruding direction of the protruding portion may be less than 60 degrees. In this case, the resistance of the needle when puncturing is reduced, so that the needle can be punctured with a smaller force.
本発明によれば、穿刺ルートに針を挿入して血管に穿刺する際に、針により血管表面の穿刺起点部を容易に探り当てることができる。よって、穿刺の作業を簡単かつ短時間で行うことができる。また、針により血管を傷つけたり患者に痛みを与えることも防止できる。また、経験や技術によらず作業を適切に行うことができる。 According to the present invention, when inserting a needle into a puncture route and puncturing a blood vessel, it is possible to easily find a puncture start point on the surface of the blood vessel with the needle. Therefore, the puncturing operation can be performed easily and in a short time. Further, it is possible to prevent blood vessels from being damaged by the needle and pain to the patient. In addition, work can be performed appropriately regardless of experience and skill.
以下、図面を参照して、本発明の好ましい実施の形態について説明する。図１は、本実施の形態に係る針としてのダルニードル１を有する血液浄化処理用器具２の一例を示す説明図である。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing an example of a blood purification treatment instrument 2 having a dull needle 1 as a needle according to the present embodiment.
血液浄化処理用器具２は、例えば血液浄化処理時に患者に穿刺されるダルニードル１と、ダルニードル１が先端部に接続されたチューブ１０と、チューブ１０の後端部を他のチューブに接続するための接続部１１を有している。チューブ１０のダルニードル１に近い部分には、ダルニードル１を動かす際に作業者が保持する保持部１２が設けられている。また、チューブ１０には、クランプ１３が取り付けられている。接続部１１には、キャップ１４が嵌められている。 The blood purification treatment instrument 2 includes, for example, a dull needle 1 that is punctured by a patient at the time of blood purification treatment, a tube 10 to which the dull needle 1 is connected to a distal end portion, and a rear end portion of the tube 10 for connecting to another tube. A connection part 11 is provided. A holding portion 12 that is held by an operator when the dull needle 1 is moved is provided in a portion near the dull needle 1 of the tube 10. A clamp 13 is attached to the tube 10. A cap 14 is fitted to the connection portion 11.
血液浄化処理用器具２は、例えば接続部１１により他のチューブに接続され、図示しない血液浄化器を有する血液浄化回路の一部を構成する。血液浄化処理用器具２は、血液浄化回路の採血側の端部区間と返血側の端部区間に取り付けられ、血液浄化処理時にはダルニードル１を通じて採血や返血が行われる。なお、血液浄化処理には、例えば透析処理、血漿交換処理、血漿吸着処理、血液成分除去処理など含まれる。 The blood purification treatment instrument 2 is connected to another tube by, for example, the connecting portion 11 and constitutes a part of a blood purification circuit having a blood purifier (not shown). The blood purification treatment instrument 2 is attached to a blood collection side end section and a blood return end section of the blood purification circuit, and blood collection and blood return are performed through the dull needle 1 during the blood purification process. The blood purification processing includes, for example, dialysis processing, plasma exchange processing, plasma adsorption processing, blood component removal processing, and the like.
ダルニードル１は、図２、図３及び図４に示すように先端部に針の軸Ａに対し傾斜した傾斜端面２０ａを有する管状部２０と、管状部２０の傾斜端面２０ａの先端２０ｂから前方側に突出した突出部２１を有している。突出部２１は、管状部２０よりも幅（軸Ａに対して直角の左右方向の長さ）が小さく形成されている。突出部２１は、管状部２０と同じ厚み、管状部２０の横断面(軸方向に対して直角の断面)の曲率半径と同じ曲率半径で幅方向に円弧状に湾曲している。突出部２１の内壁面は、管状部２０の内壁面に連続し、突出部２１の外壁面は、管状部２０の外壁面に連続している。 As shown in FIGS. 2, 3 and 4, the dull needle 1 includes a tubular portion 20 having an inclined end surface 20a inclined with respect to the axis A of the needle at the distal end, and a front side from the distal end 20b of the inclined end surface 20a of the tubular portion 20. It has the protrusion part 21 which protruded. The protrusion 21 is formed to have a smaller width (length in the left-right direction perpendicular to the axis A) than the tubular portion 20. The protruding portion 21 is curved in the shape of an arc in the width direction with the same thickness as the tubular portion 20 and the same radius of curvature as that of the transverse section (cross section perpendicular to the axial direction) of the tubular portion 20. The inner wall surface of the protruding portion 21 is continuous with the inner wall surface of the tubular portion 20, and the outer wall surface of the protruding portion 21 is continuous with the outer wall surface of the tubular portion 20.
突出部２１の先端２１ａは、前方に凸に湾曲している。突出部２１の先端２１ａの軸方向における曲率半径は、例えば傾斜端面２０ａの先端２０ｂ（図３示す点線部分）の曲率半径よりも小さく設定されている。図４に示すように突出部２１の突出方向（針の軸Ａ方向）に対する傾斜端面２０ａの傾斜角度Ｂは、６０度未満に設定されている。これにより、傾斜端面２０ａと、この傾斜端面２０ａと接続される突出部２１の端辺とのなす角（傾斜角度Ｂと同じ）が６０度未満になる。 The tip 21a of the protrusion 21 is convexly curved forward. The radius of curvature in the axial direction of the tip 21a of the protruding portion 21 is set smaller than the radius of curvature of the tip 20b (dotted line portion shown in FIG. 3) of the inclined end surface 20a, for example. As shown in FIG. 4, the inclination angle B of the inclined end surface 20a with respect to the protruding direction (direction of the needle axis A) of the protruding portion 21 is set to be less than 60 degrees. Thereby, the angle (same as the inclination angle B) formed by the inclined end face 20a and the end side of the protruding portion 21 connected to the inclined end face 20a is less than 60 degrees.
ダルニードル１の管状部２０の外径は、０．４ｍｍ〜２．５ｍｍ程度が好ましく、この場合、突出部２１の左右方向の幅は、０．０２ｍｍ〜２．５０ｍｍ程度が好ましい。また、突出部２１の針の軸Ａ方向の長さは、２．５ｍｍ〜５．００ｍｍ程度が好ましい。ダルニードル１の材質は、ステンレスなどの金属針であってもよいし、プラスチック針であってもよい。プラスチック針では、ポリテトラプルオロエチレン、ABS樹脂（ アクリロニトリル・ブタジエン・スチレン）、ポリカーボネイト、ポリプロピレン、ポリエチレンなどが好適に用いられる。 The outer diameter of the tubular portion 20 of the dull needle 1 is preferably about 0.4 mm to 2.5 mm. In this case, the width in the left-right direction of the protruding portion 21 is preferably about 0.02 mm to 2.50 mm. Further, the length of the protrusion 21 in the direction of the axis A of the needle is preferably about 2.5 mm to 5.00 mm. The material of the dull needle 1 may be a metal needle such as stainless steel or a plastic needle. For plastic needles, polytetrafluoroethylene, ABS resin (acrylonitrile / butadiene / styrene), polycarbonate, polypropylene, polyethylene and the like are preferably used.
次に、以上のように構成されたダルニードル１を用いて血管に穿刺する作業について説明する。作業を行う前には、既に初回の通常針による穿刺が行われおり、図９に示したように患者のシャント部に、皮膚１００から血管１０１に通じる穿刺ルート１０２が形成されている。また、ダルニードル１を有する血液浄化処理用器具２は、無菌袋から取り出され、血液浄化回路に接続されている。 Next, the operation of puncturing a blood vessel using the dull needle 1 configured as described above will be described. Prior to the work, the first puncture with a normal needle has already been performed, and a puncture route 102 that leads from the skin 100 to the blood vessel 101 is formed in the patient's shunt as shown in FIG. The blood purification treatment instrument 2 having the dull needle 1 is taken out of the sterile bag and connected to the blood purification circuit.
先ず、図５に示すようにダルニードル１などにより穿刺ルート１０２の痂皮１０３が取り除かれ、皮膚１００に穿刺孔１０２ａが開口する。次に、穿刺孔１０２ａから穿刺ルート１０２にダルニードル１が挿入される。ダルニードル１が挿入されると、図６に示すように突出部２１が血管１０１の表面の閉じた穿刺孔１０１ａに到達する。そこで、ダルニードル１の突出部２１が穿刺孔１０１ａに押し付けられながら、突出部２１の先端２１ａにより図１２に示したようなＵ字型の穿刺孔１０１ａの穿刺起点部１０４が探り当てられる。突出部２１の先端２１ａが穿刺起点部１０４に合わせられると、図７に示すように当該穿刺起点部１０４から穿刺孔１０１ａが開口し、ダルニードル１が血管１０１内に穿刺される。その後、ダルニードル１から採血及び返血が行われ、血液浄化回路を用いて血液浄化処理が行われる。 First, as shown in FIG. 5, the crust 103 of the puncture route 102 is removed by the dull needle 1 or the like, and a puncture hole 102a is opened in the skin 100. Next, the dull needle 1 is inserted into the puncture route 102 from the puncture hole 102a. When the dull needle 1 is inserted, the protruding portion 21 reaches the puncture hole 101a where the surface of the blood vessel 101 is closed as shown in FIG. Therefore, while the protruding portion 21 of the dull needle 1 is pressed against the puncture hole 101a, the puncture starting point portion 104 of the U-shaped puncture hole 101a as shown in FIG. When the tip 21a of the protrusion 21 is aligned with the puncture starting point 104, the puncture hole 101a is opened from the puncture starting point 104 as shown in FIG. 7, and the dull needle 1 is punctured into the blood vessel 101. Thereafter, blood is collected and returned from the dull needle 1, and a blood purification process is performed using a blood purification circuit.
以上の実施の形態によれば、ダルニードル１の傾斜端面２０ａの先端２０ｂに、幅が小さい突出部２１が形成されているので、突出部２１により血管１０１の感触が指に伝わり易くなり、穿刺起点部１０４に対する針の探り性を向上できる。よって、血管１０１に穿刺する作業を簡単かつ短時間で行うことができる。また、突出部２１の先端２１ａが前方に凸に湾曲しているので、突出部２１の先端２１ａにより血管１０１を傷つけたり患者に痛みを与えることを防止できる。 According to the above embodiment, since the protrusion part 21 with a small width is formed at the tip 20b of the inclined end surface 20a of the dull needle 1, the protrusion 21 makes it easy to transmit the touch of the blood vessel 101 to the finger, and the puncture starting point The probeability of the needle with respect to the portion 104 can be improved. Therefore, the operation of puncturing the blood vessel 101 can be performed easily and in a short time. Further, since the tip 21a of the protrusion 21 is convexly curved forward, it is possible to prevent the blood vessel 101 from being damaged or painful to the patient by the tip 21a of the protrusion 21.
また、上記実施の形態では、突出部２１の先端２１ａの軸方向における曲率半径が傾斜端面２０ａの先端２０ｂの軸方向における曲率半径よりも小さくなっているので、突出部２１の先端２１ａによる血管１０１の感触がより指先に伝わり易くなり、穿刺起点部１０４に対する針の探り性をさらに向上できる。 In the above embodiment, the radius of curvature in the axial direction of the tip 21a of the protruding portion 21 is smaller than the radius of curvature in the axial direction of the tip 20b of the inclined end surface 20a. Can be more easily transmitted to the fingertip, and the probeability of the needle with respect to the puncture starting point 104 can be further improved.
また、突出部２１の突出方向に対する傾斜端面２０ａの傾斜角度Ｂが６０度未満になっているので、穿刺する際のダルニードル１の抵抗が小さくなり、より小さな力でダルニードル１を血管１０１に穿刺できる。 Further, since the inclination angle B of the inclined end surface 20a with respect to the protruding direction of the protruding portion 21 is less than 60 degrees, the resistance of the dull needle 1 when puncturing is reduced, and the dull needle 1 can be punctured into the blood vessel 101 with a smaller force. .
以上、添付図面を参照しながら本発明の好適な実施の形態について説明したが、本発明はかかる例に限定されない。当業者であれば、特許請求の範囲に記載された思想の範疇内において、各種の変更例または修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。 The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the idea described in the claims, and these naturally belong to the technical scope of the present invention. It is understood.
例えばダルニードル１の突出部２１の形状は、上記実施の形態で記載したものに限られず、他の形状を有するものであってもよい。例えば突出部２１は、先端２１ａの幅だけが、他の部分よりも小さくなるような形状を有していてもよい。また、上記実施の形態では、突出部２１の先端２１ａの軸方向における曲率半径が傾斜端面２０ａの先端２０ｂの軸方向における曲率半径よりも小さくなっていたが、その関係が逆であってもよい。傾斜端面２０ａは、図８に示すように途中に段差２０ｄが形成されているようなものであってもよい。なお、段差２０ｄの前後で傾斜角度が異なる傾斜端面２０ａになった場合には、最も大きい傾斜の角度を傾斜角度Ｂとする。また、上記実施の形態では、ダルニードル１が血液浄化処理時に用いられるものであったが、いわゆるボタンホール穿刺法で用いられるものであればよい。例えば注射器により薬液を投与する時や採血を行う時に用いられるダルニードルにも、本発明は適用できる。 For example, the shape of the protrusion 21 of the dull needle 1 is not limited to that described in the above embodiment, and may have another shape. For example, the protruding portion 21 may have a shape such that only the width of the tip 21a is smaller than the other portions. Moreover, in the said embodiment, although the curvature radius in the axial direction of the front-end | tip 21a of the protrusion part 21 was smaller than the curvature radius in the axial direction of the front-end | tip 20b of the inclination end surface 20a, the relationship may be reverse. . The inclined end surface 20a may be such that a step 20d is formed in the middle as shown in FIG. In addition, when it becomes the inclination end surface 20a from which an inclination angle differs before and behind the level | step difference 20d, the angle of the largest inclination is made into the inclination angle B. FIG. Moreover, in the said embodiment, although the dull needle 1 was used at the time of blood purification processing, what is necessary is just to be used by what is called a buttonhole puncture method. For example, the present invention can be applied to a dull needle that is used when a drug solution is administered by a syringe or when blood is collected.
以下に、上記実施の形態で記載したダルニードル１の性能評価実験の結果を示す。評価実験１は、ダルニードル１を用いた穿刺性能を評価する実験である。評価実験２は、ダルニードル１を用いた穿刺抵抗を評価する実験である。 Below, the result of the performance evaluation experiment of the dull needle 1 described in the said embodiment is shown. Evaluation experiment 1 is an experiment for evaluating the puncture performance using the dull needle 1. Evaluation experiment 2 is an experiment for evaluating the puncture resistance using the dull needle 1.
（評価実験１）
評価実験１は、穿刺が行われる対象を、透析導入後３年以上経過し週３回の血液透析を実施している末期腎不全血液透析患者２０名とした。各患者の２回目の透析日に、上腕シャント部において図２に示した本発明に係るダルニードル１若しくは図１１に示した従来のダルニードル１２０を用いて穿刺を行った。ダルニードルが穿刺ルート１０２に挿入されてからダルニードルが血管１０１に穿刺されるまでに時間を計測した。これらの穿刺時間を次の表１に示す。
(Evaluation Experiment 1)
In the evaluation experiment 1, the subjects to be punctured were 20 end-stage renal failure hemodialysis patients who had undergone hemodialysis three times a week after dialysis was introduced for 3 years or more. Puncture was performed on the second dialysis day of each patient using the dull needle 1 according to the present invention shown in FIG. 2 or the conventional dull needle 120 shown in FIG. The time was measured from when the dull needle was inserted into the puncture route 102 until the dull needle was punctured into the blood vessel 101. These puncture times are shown in Table 1 below.
（評価実験２）
評価実験２は、荷重測定器（MODEL-1605N：アイコーエンジニアリング社製）を用い、厚み１．０５ｍｍ、４０ｍｍΦのシリコンゴム（ＳＲ-50；タイガーポリマー社製）に対し１７G針で穿刺後各サンプルのダルニードルを刺通させ、そのときの必要荷重を測定することによって行った。実験条件として、室温２６℃にて刺通スピードは５０ｍｍ/minで行った。この評価実験２の結果を表２に示す。表２中の最大必要荷重は、各サンプルを刺通したときに必要になった最大荷重であり、接点必要荷重は、突出部２１と傾斜端面２０ａとの接点がシリコンゴムを刺通する際に必要になった荷重である。
(Evaluation Experiment 2)
Evaluation experiment 2 uses a load measuring instrument (MODEL-1605N: manufactured by Aiko Engineering Co., Ltd.), and punctures each sample after puncturing with a 17G needle against silicon rubber (SR-50; manufactured by Tiger Polymer Co., Ltd.) having a thickness of 1.05 mm and 40 mmΦ. A dull needle was pierced and the required load at that time was measured. As experimental conditions, the piercing speed was 50 mm / min at a room temperature of 26 ° C. The results of this evaluation experiment 2 are shown in Table 2. The maximum required load in Table 2 is the maximum load required when each sample is pierced, and the contact required load is when the contact between the protruding portion 21 and the inclined end surface 20a is pierced with silicon rubber. This is the required load.
実施例１、２、３、４及び比較例１のサンプルは、突出部２１と傾斜端面２０ａとの接点角度（傾斜角度）Ｂがそれぞれ １２．０度、１１．７度、２５．１度、 ２８．４度、６５．０度のダルニードルである。比較例２のサンプルは、図１１に示す突出部２１を有さないダルニードルである。 In the samples of Examples 1, 2, 3, 4 and Comparative Example 1, the contact angle (inclination angle) B between the protrusion 21 and the inclined end surface 20a is 12.0 degrees, 11.7 degrees, 25.1 degrees, It is a 28.4 degree, 65.0 degree dull needle. The sample of Comparative Example 2 is a dull needle that does not have the protruding portion 21 shown in FIG.
接点角度Ｂが６０度未満の実施例１〜４の最大必要荷重は、比較例１、２に比べて著しく小さくなっている。また、実施例１〜４の接点必要荷重は、１００ｍN以下で、比較例１に対して著しく小さくなっている。よって、接点角度Ｂを６０度未満にすることにより、刺通抵抗が著しく低下し、穿刺をスムーズに行うことができる。 The maximum required loads of Examples 1 to 4 having a contact angle B of less than 60 degrees are significantly smaller than those of Comparative Examples 1 and 2. Moreover, the contact required load of Examples 1-4 is 100 mN or less, and is remarkably small with respect to Comparative Example 1. Therefore, by making the contact angle B less than 60 degrees, the piercing resistance is remarkably lowered, and puncture can be performed smoothly.
本発明は、穿刺ルートを通じて血管に穿刺する際の血管の穿刺起点部に対する針の探り性を向上する際に有用である。 The present invention is useful for improving the probeability of a needle with respect to a puncture starting point of a blood vessel when puncturing a blood vessel through a puncture route.
１ ダルニードル
２ 血液浄化処理用器具
１０ チューブ
１１ 接続部
１２ 保持部
１３ クランプ
１４ キャップ
２０ 管状部
２０ａ 傾斜端面
２０ｂ 先端
２１ 突出部
２１ａ 先端
１００ 皮膚
１０１ 血管
１０１ａ 穿刺孔
１０２ 穿刺ルート
１０２ａ 穿刺孔
１０３ 痂皮
１０４ 穿刺起点部
Ａ 針の軸
Ｂ 傾斜角度
DESCRIPTION OF SYMBOLS 1 Dull needle 2 Blood purification processing instrument 10 Tube 11 Connection part 12 Holding part 13 Clamp 14 Cap 20 Tubular part 20a Inclined end surface 20b Tip 21 Projection part 21a Tip 100 Skin 101 Blood vessel 101a Puncture hole 102 Puncture route 102a Puncture hole 103 Crust 104 Puncture starting point A Needle axis B Inclination angle
Claims (3)
針の軸に対し傾斜した平面状の傾斜端面を有する管状部と、当該管状部の傾斜端面の先端から前方側に突出した突出部と、を有し、
前記突出部の内壁面は、前記管状部の内壁面に連続し、前記突出部の外壁面は、前記管状部の外壁面に連続しており、
前記突出部の先端は、前記管状部よりも幅が小さく、前方に凸に湾曲している、針。 A needle inserted into the puncture route leading from the skin to the subcutaneous blood vessel and punctured into the blood vessel,
A tubular portion having a flat inclined end surface inclined with respect to the axis of the needle, and a protruding portion protruding forward from the tip of the inclined end surface of the tubular portion,
The inner wall surface of the protruding portion is continuous with the inner wall surface of the tubular portion, and the outer wall surface of the protruding portion is continuous with the outer wall surface of the tubular portion,
The tip of the protruding portion is narrower than the tubular portion and is curved to protrude forward.
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| JP2010119634A JP5687439B2 (en) | 2010-05-25 | 2010-05-25 | needle |
| US13/115,275 US20110295152A1 (en) | 2010-05-25 | 2011-05-25 | Puncture method, incision needle, puncture needle, needle cap and instrument for blood purification treatment |
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| JP2010119634A JP5687439B2 (en) | 2010-05-25 | 2010-05-25 | needle |
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| JPS512280A (en) * | 1974-06-26 | 1976-01-09 | Hajikano Kiyoshi | |
| WO1990001349A1 (en) * | 1988-08-01 | 1990-02-22 | Utterberg David S | Injection site needle |
| US6319279B1 (en) * | 1999-10-15 | 2001-11-20 | Edwards Lifesciences Corp. | Laminated self-sealing vascular access graft |
| KR100672875B1 (en) * | 2004-06-08 | 2007-01-24 | 안강 | Medical needle |
| FR2881353B1 (en) * | 2005-02-03 | 2008-12-05 | Vygon Sa | IMPROVEMENT TO PUNCTURAL BITS AND CATHETER TUBES |
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