JP5373325B2 - Indwelling needle - Google Patents
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- JP5373325B2 JP5373325B2 JP2008162884A JP2008162884A JP5373325B2 JP 5373325 B2 JP5373325 B2 JP 5373325B2 JP 2008162884 A JP2008162884 A JP 2008162884A JP 2008162884 A JP2008162884 A JP 2008162884A JP 5373325 B2 JP5373325 B2 JP 5373325B2
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Abstract
Description
本発明は、先端部が下方に向って屈曲した中空の針部と、針部の後端に設けられたハブと、針部の先端を収容自在な可撓性のチューブ体とを備える留置針に関する。 The present invention relates to an indwelling needle comprising a hollow needle portion whose tip portion is bent downward, a hub provided at the rear end of the needle portion, and a flexible tube body that can accommodate the tip of the needle portion. About.
従来、中間に屈曲部を有し先端部が下方に向って屈曲した針部と、針部の後端に設けられたハブと、スリット状の切断部を有しハブの外方に露出する可撓性のチューブ体と、チューブ体の先端に設けられた固定部材とを備え、固定部材を把持して針部の先端まで引っ張り、チューブ体内に切断部から針部の先端部を収容する留置針が知られている(例えば、特許文献1参照)。これにより、使用済み留置針を安全に廃棄することができる。
従来の留置針では、チューブ体の先端に設けられた固定部材を把持して針部の先端まで引っ張りチューブ体内に針部を収容するため、固定部材を把持した手が針部の先端に接近し、誤って固定部材を把持した手に針部の先端が刺さる虞がある。このため、従来の留置針では、細心の注意を払いながら固定部材を引っ張る必要があり、操作性が悪いものであった。 In the conventional indwelling needle, the holding member provided at the tip of the tube body is gripped and pulled to the tip of the needle portion so that the needle portion is accommodated in the tube body, so that the hand holding the fixing member approaches the tip of the needle portion. There is a possibility that the tip of the needle portion may be stuck in the hand that erroneously grips the fixing member. For this reason, in the conventional indwelling needle, it was necessary to pull the fixing member while paying close attention, and the operability was poor.
又、従来の留置針は、チューブ体から針部の先端を突出させた状態においては、チューブ体がハブの外方へ露出するため、ハブを患者の体表へ固定する際にチューブ体が邪魔となる。又、チューブ体が引掛かり易く、意図せずに留置針が患者の体表から脱落する虞もある。 Further, in the conventional indwelling needle, when the tip of the needle portion is protruded from the tube body, the tube body is exposed to the outside of the hub. It becomes. Further, the tube body is easily caught, and there is a possibility that the indwelling needle may fall off the patient's body surface unintentionally.
本発明は、以上の点に鑑み、操作性を向上させると共に、安全に針部の先端をチューブ体内に収容することができ、且つチューブ体から針部の先端が突出した状態においてもチューブ体が邪魔とならない留置針を提供することを目的とする。 In view of the above points, the present invention improves operability, can safely accommodate the tip of the needle portion in the tube body, and the tube body can be used even when the tip of the needle portion protrudes from the tube body. An object is to provide an indwelling needle that does not get in the way.
上記目的を達成するため、本発明は、中間にL字状に屈曲した屈曲部を有し先端部が下方に向って屈曲した中空の針部と、針部の後端に設けられたハブと、針部の先端を収容自在な可撓性のチューブ体とを備える留置針において、ハブには前方へ延びて針部の後端部を覆う筒状部が設けられ、筒状部には前後方向に延びるスリットが設けられ、チューブ体は、針部を摺動自在に内挿すると共に、初期状態では筒状部内であって針部の後端側に位置し、チューブ体の後端には、筒状部内で針部の屈曲部と後端との間を摺動自在な摺動筒が設けられ、摺動筒には、筒状部のスリットから外方へ露出する操作レバーが設けられ、チューブ体の上側外面に前後方向に間隔を存して複数の切込部が設けられ、操作レバーを筒状部のスリットに沿って前進させることによりチューブ体が針部の先端を収容することを特徴とする。 In order to achieve the above object, the present invention provides a hollow needle portion having a bent portion bent in an L shape in the middle and a tip portion bent downward, a hub provided at the rear end of the needle portion, In the indwelling needle comprising a flexible tube body that can accommodate the tip of the needle part, the hub is provided with a cylindrical part that extends forward and covers the rear end part of the needle part, and the cylindrical part includes front and rear parts. A slit extending in the direction is provided, and the tube body is slidably inserted into the needle portion, and in the initial state, is located in the cylindrical portion at the rear end side of the needle portion, and at the rear end of the tube body. In the cylindrical part, a sliding cylinder is provided that is slidable between the bent part and the rear end of the needle part, and the sliding cylinder is provided with an operation lever that is exposed outward from the slit of the cylindrical part. The upper outer surface of the tube body is provided with a plurality of incisions at intervals in the front-rear direction, and the operation lever is advanced along the slit of the cylindrical portion Wherein the tube body housing the tip of the needle part by causing.
本発明によれば、ハブから露出する操作レバーを前方へ押すことによりチューブ体が前方へスライドし針部の先端を収容することができる。このため、操作レバーを押す手が針部の先端に接近することがなく、従来のものと比較してより安全に針部をチューブ体で収容し廃棄することができる。又、初期状態においては、チューブ体はハブの筒状部内に位置するため、本発明の留置針を患者に留置した際に、チューブ体が邪魔とならない。 According to the present invention, the tube body is slid forward by pushing the operation lever exposed from the hub forward, and the tip of the needle portion can be accommodated. For this reason, the hand which pushes an operation lever does not approach the front-end | tip of a needle part, and can accommodate and discard a needle part with a tube body more safely compared with the conventional one. In the initial state, the tube body is located in the cylindrical portion of the hub, so that the tube body does not get in the way when the indwelling needle of the present invention is placed in the patient.
ここで、チューブ体を前方へスライドさせる際に、チューブ体が針部の屈曲部で引掛かり前進できなくなることも考えられるが、本発明では、チューブ体の上側外面に前後方向に間隔を存して複数の切込部を設け、チューブ体が屈曲部で切込部を開くようにして容易に曲がることができる。従って、本発明のチューブ体は針部の屈曲部に引掛かることなくスムーズに前進することができる。 Here, when the tube body is slid forward, the tube body may be caught by the bent portion of the needle portion and cannot move forward, but in the present invention, there is an interval in the front-rear direction on the upper outer surface of the tube body. The tube body can be bent easily by opening the cut portion at the bent portion. Therefore, the tube body of the present invention can move forward smoothly without being caught by the bent portion of the needle portion.
又、本発明においては、チューブ体は先端を閉塞する閉塞部を備え、チューブ体の先端部にはチューブ体の中心軸線に対して偏心させた位置に孔部が設けられ、この孔部からチューブ体の先端を湾曲させるようにして針部の先端部が露出し、操作レバーを筒状体のスリットに沿って前進させ針部の先端がチューブ体の孔部から抜け出したときに、針部の先端がチューブ体内に収容されるように構成することが好ましい。 In the present invention, the tube body is provided with a blocking portion that closes the tip, and a hole is provided at a position eccentric to the central axis of the tube body at the tip of the tube body. When the tip of the needle is exposed so that the tip of the body is curved and the operating lever is advanced along the slit of the cylindrical body and the tip of the needle is pulled out of the hole of the tube body, It is preferable that the tip is accommodated in the tube body.
かかる構成によれば、チューブ体の孔部から針部の先端が露出するため、チューブ体の先端は湾曲した状態となる。そして、操作レバーを前進させて針部の先端がチューブ体内に収容され、針部の先端がチューブ体の孔部から抜け出すと、チューブ体は自己の弾性力により湾曲した状態が解除される。これにより、針部の先端とチューブ体の孔部との位置がずれ、再び針部の先端が孔部から突出することを防止することができる。 According to such a configuration, since the tip of the needle part is exposed from the hole of the tube body, the tip of the tube body is in a curved state. When the operation lever is advanced to house the tip of the needle part in the tube body and the tip of the needle part comes out of the hole of the tube body, the tube body is released from the curved state due to its own elastic force. Thereby, the position of the tip of the needle part and the hole of the tube body is displaced, and the tip of the needle part can be prevented from protruding from the hole again.
又、本発明においては、操作レバーを筒状体のスリットに沿って前進させ、チューブ体内に針部の先端を収容したときに、操作レバーの後退を阻止する後退阻止機構を設ければ、針部の先端がチューブ体から再び突出することをより確実に防止することができる。 In the present invention, if the operation lever is moved forward along the slit of the cylindrical body and a retraction preventing mechanism for preventing the operation lever from retreating when the tip of the needle portion is accommodated in the tube body, the needle is provided. It can prevent more reliably that the front-end | tip of a part protrudes from a tube body again.
図1〜図3を参照して本発明の留置針の実施形態を説明する。実施形態の留置針は、いわゆるヒューバー針であり、例えば、皮下埋込型カテーテルのアクセスポートに穿刺するものである。図1に示すように、実施形態の留置針1は中空の針部2と針部2の後端に設けられたハブ3とを備える。ハブ3の後端には輸液チューブ4が接続され、輸液チューブ4から供給される栄養剤等がハブ3、針部2を介して患者に供給される。 An embodiment of the indwelling needle of the present invention will be described with reference to FIGS. The indwelling needle of the embodiment is a so-called Huber needle and punctures an access port of a subcutaneously implantable catheter, for example. As shown in FIG. 1, the indwelling needle 1 of the embodiment includes a hollow needle portion 2 and a hub 3 provided at the rear end of the needle portion 2. An infusion tube 4 is connected to the rear end of the hub 3, and nutrients and the like supplied from the infusion tube 4 are supplied to the patient via the hub 3 and the needle portion 2.
針部2は、中間に屈曲部2aを有し、先端部が下方に向って約90度に屈曲している。針部2の先端には刃部2bが設けられている。ハブ3は、針部2の後端に接続し針部2を支持するハブ本体31と、ハブ本体31の前端から針部2側に向ってのびる筒状部32とで構成される。筒状部32の周面には、側方に位置させて前後方向に延びるスリット33が形成されている。 The needle part 2 has a bent part 2a in the middle, and the tip part is bent at about 90 degrees downward. A blade portion 2 b is provided at the tip of the needle portion 2. The hub 3 includes a hub body 31 that is connected to the rear end of the needle portion 2 and supports the needle portion 2, and a cylindrical portion 32 that extends from the front end of the hub body 31 toward the needle portion 2 side. A slit 33 is formed on the peripheral surface of the cylindrical portion 32 and extends laterally so as to be located on the side.
筒状部32内には、針部2を内挿する可撓性のチューブ体51が配置されている。チューブ体51の後端には摺動筒52が連結されている。摺動筒52には筒状部32のスリット33から接続部53を介して筒状部32の外方へ露出する操作レバー54が設けられている。 In the cylindrical part 32, the flexible tube body 51 which inserts the needle part 2 is arrange | positioned. A sliding cylinder 52 is connected to the rear end of the tube body 51. The sliding cylinder 52 is provided with an operation lever 54 exposed from the slit 33 of the cylindrical part 32 through the connection part 53 to the outside of the cylindrical part 32.
スリット33には、後端側に位置する第1幅狭部33aと、前端側に位置する第2幅狭部33bとが形成され、両幅狭部33a,33bは接続部53の幅よりも狭く設定されている。第1幅狭部33aの前端側及び後端側は傾斜しており、第1幅狭部33aは、操作レバー54を解除自在にスリット33の後端位置(初期状態の位置)に留めるように接続部53の前側面と係合する。 The slit 33 is formed with a first narrow portion 33 a located on the rear end side and a second narrow portion 33 b located on the front end side. Both narrow portions 33 a and 33 b are larger than the width of the connection portion 53. It is set narrowly. The front end side and the rear end side of the first narrow portion 33a are inclined, and the first narrow portion 33a holds the operation lever 54 at the rear end position (the initial position) of the slit 33 so as to be releasable. Engage with the front side surface of the connecting portion 53.
これにより、意図せずに操作レバー54を前進させてしまうことを抑制させることができる。又、誤って操作レバー54を前進させてしまい、接続部53の前側面と第1幅狭部33aとの係合が解除された場合であっても、接続部53の後側面で第1幅狭部33aを押し広げるようにして、操作レバー54をスリット33の後端位置に後退させることができる。 Thereby, it can suppress that the operation lever 54 is moved forward unintentionally. Even if the operation lever 54 is moved forward by mistake and the engagement between the front side surface of the connection portion 53 and the first narrow portion 33a is released, the first width is reduced on the rear side surface of the connection portion 53. The operating lever 54 can be retracted to the rear end position of the slit 33 by pushing the narrow portion 33a.
又、第2幅狭部33bの後端側は傾斜しており、操作レバー54の前進を接続部53が第2幅狭部33bを押し広げるようにして許容する。第2幅狭部33bの前端側は、段部となっており、一端操作レバー54がスリット33の前端位置まで前進した後は、第2幅狭部33bの前端側の段部が接続部53の後側面を係止し、操作レバー54の後退を阻止する。即ち、実施形態の第2幅狭部33bの前端側の段部が本発明の後退阻止機構に相当する。 Further, the rear end side of the second narrow portion 33b is inclined, and the advancement of the operation lever 54 is allowed so that the connecting portion 53 spreads the second narrow portion 33b. The front end side of the second narrow portion 33 b is a stepped portion, and after the one end operation lever 54 has advanced to the front end position of the slit 33, the step portion on the front end side of the second narrow portion 33 b is the connecting portion 53. The rear side surface is locked to prevent the operation lever 54 from retreating. That is, the stepped portion on the front end side of the second narrow portion 33b of the embodiment corresponds to the backward movement prevention mechanism of the present invention.
チューブ体51の上側外面には前後方向に間隔を存して半円状で内周面まで切り込まれた切込部51aが複数形成されている。チューブ体51の先端は熱圧着により形成された閉塞部51bで閉塞されている。又、チューブ体51の先端部周壁には孔部51cが設けられている。即ち、孔部51cはチューブ体51の中心軸線に対して偏心している。孔部51cにはチューブ体51の先端部を上方へ押し曲げるようにして針部2が挿通され針部2の先端部がチューブ体51の外方に露出している。針部2の先端部には筒状のカバー6が設けられ刃部2bを覆っている。 On the upper outer surface of the tube body 51, a plurality of cut portions 51 a are formed that are cut in the semicircular shape to the inner peripheral surface with a space in the front-rear direction. The distal end of the tube body 51 is closed by a closing portion 51b formed by thermocompression bonding. In addition, a hole 51 c is provided in the peripheral wall at the tip of the tube body 51. That is, the hole 51 c is eccentric with respect to the central axis of the tube body 51. The needle portion 2 is inserted into the hole 51 c so as to push and bend the distal end portion of the tube body 51 upward, and the distal end portion of the needle portion 2 is exposed to the outside of the tube body 51. A cylindrical cover 6 is provided at the tip of the needle portion 2 and covers the blade portion 2b.
実施形態の留置針1を使用する際には、カバー6を取り外し、針部2の先端を、例えば、皮下埋込型カテーテルのアクセスポートに穿刺して留置する。使用済みの留置針1を廃棄する際には、操作レバー54をスリット33に沿って前進させる。操作レバー54を前進させると、接続部53、摺動筒52を介してチューブ体51も前進する。このとき、チューブ体51は、図2に示すように、屈曲部2aで切欠部51aを開くようにして容易に曲がることができる。従って、チューブ体51は、針部2の屈曲部2aに引掛かることなく針部2に沿って容易にスライドさせることができる。 When using the indwelling needle 1 of the embodiment, the cover 6 is removed, and the tip of the needle part 2 is placed by puncturing, for example, an access port of a subcutaneous implantable catheter. When discarding the used indwelling needle 1, the operation lever 54 is advanced along the slit 33. When the operation lever 54 is moved forward, the tube body 51 is also moved forward via the connecting portion 53 and the sliding cylinder 52. At this time, as shown in FIG. 2, the tube body 51 can be bent easily by opening the notch 51a at the bent portion 2a. Therefore, the tube body 51 can be easily slid along the needle portion 2 without being caught by the bent portion 2 a of the needle portion 2.
操作レバー54をスリット33の前端位置まで前進させると、第2幅狭部33bを乗り越えた接続部53の後側面は第2幅狭部33bの前側面の段部に係止され、操作レバー54の後退が解除不能に阻止される。このとき、図3に示すように、針部2の先端はチューブ体51の孔部51cから抜け出し、チューブ体51の先端部の湾曲した状態が自己の弾性力により解除され、針部2の先端部がチューブ体51内に収容される。孔部51cはチューブ体51の中心軸線に対し偏心されているため、針部2の刃部2bが再び孔部51cからチューブ体51の外方に突出することはない。 When the operation lever 54 is advanced to the front end position of the slit 33, the rear side surface of the connection portion 53 that has passed over the second narrow portion 33b is locked to the step on the front side surface of the second narrow portion 33b. Retreat is prevented from being canceled. At this time, as shown in FIG. 3, the distal end of the needle part 2 comes out of the hole 51 c of the tube body 51, and the curved state of the distal end part of the tube body 51 is released by its own elastic force. The part is accommodated in the tube body 51. Since the hole 51c is eccentric with respect to the central axis of the tube body 51, the blade part 2b of the needle part 2 does not protrude from the hole 51c to the outside of the tube body 51 again.
このように、ハブ3側の操作で容易に針部2をチューブ体51で覆うことができ、従来品と比較してより安全に留置針を廃棄することができる。又、初期状態においては、チューブ体51はハブ3の筒状部32内に位置するため、留置針1を患者に留置した際に、チューブ体51が邪魔とならない。又、閉塞部51bを肉厚にすることにより針部2の先端が閉塞部51bを突き抜けて露出することを防止できる。 Thus, the needle part 2 can be easily covered with the tube body 51 by the operation on the hub 3 side, and the indwelling needle can be discarded more safely than the conventional product. In the initial state, the tube body 51 is located in the cylindrical portion 32 of the hub 3, so that the tube body 51 does not get in the way when the indwelling needle 1 is placed in the patient. Further, by making the blocking portion 51b thick, it is possible to prevent the tip of the needle portion 2 from being exposed through the blocking portion 51b.
尚、実施形態においては、切込部51aがチューブ体51の内周面にまで達しているものを図示したが、チューブ体51が屈曲部2aに引掛かることなくスムーズにスライドできれば、切込部51aはチューブ体51の内周面にまで達する必要はない。 In the embodiment, the cut portion 51a reaches the inner peripheral surface of the tube body 51. However, if the tube body 51 can slide smoothly without being caught by the bent portion 2a, the cut portion 51a does not need to reach the inner peripheral surface of the tube body 51.
1…留置針、 2…針部、 2a…屈曲部、 2b…刃部、 3…ハブ、 31…ハブ本体、 32…筒状部、 33…スリット、 33a…第1幅狭部、 33b…第2幅狭部、 4…輸液チューブ、 51…チューブ体、 51a…切込部、 51b…閉塞部、 51c…孔部、 52…摺動筒、 53…接続部、 54…操作レバー、 6…カバー。 DESCRIPTION OF SYMBOLS 1 ... Indwelling needle, 2 ... Needle part, 2a ... Bending part, 2b ... Blade part, 3 ... Hub, 31 ... Hub main body, 32 ... Cylindrical part, 33 ... Slit, 33a ... 1st narrow part, 33b ... 1st 2 narrow part, 4 ... infusion tube, 51 ... tube body, 51a ... notch part, 51b ... closed part, 51c ... hole, 52 ... sliding cylinder, 53 ... connecting part, 54 ... operating lever, 6 ... cover .
Claims (3)
ハブには前方へ延びて針部の後端部を覆う筒状部が設けられ、筒状部には前後方向に延びるスリットが設けられ、
チューブ体は、針部を摺動自在に内挿すると共に、初期状態では筒状部内であって針部の後端側に位置し、
チューブ体の後端には、筒状部内で針部の屈曲部と後端との間を摺動自在な摺動筒が設けられ、
摺動筒には、筒状部のスリットから外方へ露出する操作レバーが設けられ、
チューブ体の上側外面に前後方向に間隔を存して複数の切込部が設けられ、
操作レバーを筒状部のスリットに沿って前進させることによりチューブ体が針部の先端を収容することを特徴とする留置針。 A hollow needle part having a bent part bent in an L shape in the middle and a tip part bent downward, a hub provided at the rear end of the needle part, and a flexible member that can accommodate the tip of the needle part In the indwelling needle provided with a sex tube body,
The hub is provided with a cylindrical portion that extends forward and covers the rear end of the needle portion, and the cylindrical portion is provided with a slit that extends in the front-rear direction.
The tube body is slidably inserted into the needle portion, and is in the cylindrical portion in the initial state and located on the rear end side of the needle portion,
At the rear end of the tube body, a sliding cylinder is provided that is slidable between the bent part of the needle part and the rear end within the cylindrical part,
The sliding cylinder is provided with an operation lever that is exposed outward from the slit of the cylindrical portion,
A plurality of notches are provided on the upper outer surface of the tube body with a space in the front-rear direction,
An indwelling needle characterized in that the tube body accommodates the tip of the needle portion by advancing the operation lever along the slit of the cylindrical portion.
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JP2008162884A JP5373325B2 (en) | 2008-06-23 | 2008-06-23 | Indwelling needle |
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JP2008162884A JP5373325B2 (en) | 2008-06-23 | 2008-06-23 | Indwelling needle |
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JP2010000276A JP2010000276A (en) | 2010-01-07 |
JP5373325B2 true JP5373325B2 (en) | 2013-12-18 |
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JP2008162884A Active JP5373325B2 (en) | 2008-06-23 | 2008-06-23 | Indwelling needle |
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US2689562A (en) * | 1951-05-15 | 1954-09-21 | Becton Dickinson Co | Blood donor assembly |
EP0778039A1 (en) * | 1995-12-07 | 1997-06-11 | Sarcos, Inc. | Catheter guide wire |
JPH09299483A (en) * | 1996-05-09 | 1997-11-25 | Hisatoshi Suminoe | Injection needle with sliding cover |
JP4378012B2 (en) * | 2000-01-14 | 2009-12-02 | テルモ株式会社 | Puncture tool |
US6918894B2 (en) * | 2002-02-28 | 2005-07-19 | Medical Product Specialists | Huber needle with anti-rebound safety mechanism |
EP1628563B1 (en) * | 2003-05-23 | 2009-09-23 | Globus Medical, Inc. | Spine stabilization system |
US8057508B2 (en) * | 2004-07-28 | 2011-11-15 | Ethicon Endo-Surgery, Inc. | Surgical instrument incorporating an electrically actuated articulation locking mechanism |
JP4973025B2 (en) * | 2006-06-26 | 2012-07-11 | ニプロ株式会社 | Safety needle assembly |
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