JP2005323762A - Indwelling needle - Google Patents

Indwelling needle Download PDF

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JP2005323762A
JP2005323762A JP2004143931A JP2004143931A JP2005323762A JP 2005323762 A JP2005323762 A JP 2005323762A JP 2004143931 A JP2004143931 A JP 2004143931A JP 2004143931 A JP2004143931 A JP 2004143931A JP 2005323762 A JP2005323762 A JP 2005323762A
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blood
needle
inner needle
monitor
indwelling
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JP4403013B2 (en
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Hiroaki Nakajima
弘明 中島
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Medikit Co Ltd
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Medikit Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a indwelling needle by which the whole constitution of the indwelling needle can be made compact and the amount of blood return to a blood monitor when puncturing into a blood vessel can be controlled. <P>SOLUTION: The indwelling needle including an inner needle 7, an outer needle 13 and covers 3, 5 covering the inner needle 7 after use has a water absorbable and flexible blood monitor 23 absorbing the blood when the inner needle 7 is punctured into a patient in an inner needle hub 9 supporting the distal end portion of the inner needle 7 and is constituted so as to be able to control the speed in which the blood runs into the blood monitor 23. The blood monitor 23 is shaped in an elongated string shape, the covers 3, 5 is extendably and contractably constituted. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、留置針に係り、さらに詳細には、全体的構成の小型化を図ることができると共に、血液モニターへの逆血の量を調整可能な留置針に関する。   The present invention relates to an indwelling needle, and more particularly to an indwelling needle that can reduce the overall size of the indwelling needle and can adjust the amount of reverse blood to the blood monitor.

留置針は、内針、外針及び針が血管に穿刺されたことを確認するために、逆血（フラッシュバック）を確認する血液モニターを備え、さらに安全のために使用後の内針及び前記血液モニターを覆うカバーを備えた構成が一般的である（特許文献１参照）。   The indwelling needle includes an inner needle, an outer needle, and a blood monitor for confirming reverse blood (flashback) in order to confirm that the needle has been punctured into the blood vessel. A configuration including a cover that covers the blood monitor is common (see Patent Document 1).

上記特許文献１の記載に係る留置針５０は、図５に示すように、使用前の状態は筒状のカバー５１の開口端側に備えた内針ハブ係止手段５２によって、内針５３の基端部側を固定した内針ハブ５４の周溝状の係止部５５を係止した構成である。前記内針５３は、外針５６内に挿通してあり、上記外針５６の基端部側を一体的に支持した外針ハブ５７は、前記内針ハブ５４に嵌合してある。   As shown in FIG. 5, the indwelling needle 50 according to the description of Patent Document 1 is in a state before use of the inner needle 53 by the inner needle hub locking means 52 provided on the opening end side of the cylindrical cover 51. It is the structure which latched the peripheral groove-shaped latching | locking part 55 of the inner needle hub 54 which fixed the base end part side. The inner needle 53 is inserted into the outer needle 56, and an outer needle hub 57 that integrally supports the proximal end side of the outer needle 56 is fitted to the inner needle hub 54.

前記内針ハブ５４には、針を血管に穿刺したときの逆血を確認するための中空状の血液モニター５８が形成してあると共に、この血液モニター５８には、空気は透過させるが血液は透過させないフィルタ５９が設けられている。さらに、前記内針ハブ５４には、前記カバー５１の外表面に設けた磁石６１と対向して反発する磁石６２が設けられている。そして、前記カバー５１の底部には、磁石６２を磁着する保持板６３が設けられている。
特開２００２−１０２３４７号公報 The inner needle hub 54 is formed with a hollow blood monitor 58 for confirming reverse blood when the needle is punctured into the blood vessel. A filter 59 that does not transmit light is provided. Further, the inner needle hub 54 is provided with a magnet 62 that repels the magnet 61 provided on the outer surface of the cover 51 so as to be opposed. A holding plate 63 for magnetizing the magnet 62 is provided at the bottom of the cover 51.
JP 2002-102347 A

留置針を患者の血管に穿刺したとき、血管確保には血液モニター内に血液が増え続けている状態であることが必要であるので、前記血液モニターの容積はある一定以上の容積であることが必要であった。したがって、前記血液モニターを短くしようとすると太くなり、細くすると長くなるという問題がある。   When an indwelling needle is punctured into a patient's blood vessel, it is necessary for the blood monitor to be in a state where blood is continuously increasing in order to secure the blood vessel, so the volume of the blood monitor may be a certain volume or more. It was necessary. Therefore, there is a problem that if the blood monitor is shortened, the blood monitor becomes thick, and if the blood monitor is thinned, the blood monitor becomes long.

さらに、安全のために使用後に内針をカバーによって覆うには、カバーの長さは内針の長さに血液モニターの長さを加算した寸法以上の長さが必要であり、全体的な長さ寸法が大きくなるという問題がある。   In addition, to cover the inner needle with the cover after use for safety, the length of the cover needs to be longer than the dimension of the inner needle plus the length of the blood monitor. There is a problem that the size becomes large.

本発明は、前述のごとき従来の問題に鑑みてなされたもので、内針、外針及び使用後の内針を覆うカバーを備えてなる留置針において、前記内針の基端部を支持した内針ハブに、前記内針を患者に穿刺したときの血液を吸収する吸水性を備えかつ柔軟な血液モニターを備えていることを特徴とするものである。   The present invention has been made in view of the conventional problems as described above. In an indwelling needle including a cover that covers an inner needle, an outer needle, and an inner needle after use, the proximal end portion of the inner needle is supported. The inner needle hub is provided with a water monitor that absorbs blood when the patient is punctured with the inner needle and is provided with a flexible blood monitor.

また、本発明は、上記留置針において、前記血液モニターに対して血液がにじむ速度を調整可能な構成としてなることを特徴とするものである。   Further, the present invention is characterized in that the indwelling needle is configured to be capable of adjusting a speed at which blood bleeds with respect to the blood monitor.

また、本発明は、上記留置針において、前記血液モニターは、細く長い紐状に形成してあることを特徴とするものである。   In the indwelling needle according to the present invention, the blood monitor is formed in a thin and long string shape.

また、本発明は、上記留置針において、前記カバーは伸縮可能の構成であることを特徴とするものである。   In the indwelling needle, the present invention is characterized in that the cover is configured to be extendable.

本発明によれば、留置針における内針を支持した内針ハブに、内針を患者に穿刺したときの血液を吸収する吸水性を備え、かつ柔軟な血液モニターを備えた構成であるから、留置針を患者の血管に穿刺したときの逆血による血液は血液モニターににじむものであり、血管の確保を容易に確認することができる。そして、血液モニターを細くすることが可能であり、全体的構成を細くすることができる。また、使用後には、前記血液モニターを例えば折り畳むように縮小することができ、破棄するときの長さを、内針より僅かに長い寸法程度に短くすることができるものである。   According to the present invention, the inner needle hub that supports the inner needle in the indwelling needle is provided with a water absorption function for absorbing blood when the inner needle is punctured into the patient, and is provided with a flexible blood monitor. The blood due to the reverse blood when the indwelling needle is punctured into the blood vessel of the patient bleeds into the blood monitor, and the securing of the blood vessel can be easily confirmed. The blood monitor can be made thin, and the overall configuration can be made thin. In addition, after use, the blood monitor can be reduced to be folded, for example, and the length when discarded can be shortened to a size slightly longer than the inner needle.

図１を参照するに、本発明の実施形態に係る留置針１は、一端側を開口して他端側を閉じた態様の透明な筒状の外筒３を備えており、この外筒３内には透明な内筒５が一端側から突出可能に内装されている。この内筒５の先端側には、内針７の基端部側を支持した内針ハブ９が支持されている。そして、前記内針ハブ９の先端部には外針ハブ１１が着脱可能に嵌合してあり、この外針ハブ１１には前記内針７を挿入した外針１３の基端部が一体に支持されている。   Referring to FIG. 1, an indwelling needle 1 according to an embodiment of the present invention includes a transparent cylindrical outer cylinder 3 that is open at one end and closed at the other end. A transparent inner cylinder 5 is housed inside so as to protrude from one end side. An inner needle hub 9 that supports the proximal end side of the inner needle 7 is supported on the distal end side of the inner cylinder 5. An outer needle hub 11 is detachably fitted to a distal end portion of the inner needle hub 9, and a proximal end portion of the outer needle 13 into which the inner needle 7 is inserted is integrated with the outer needle hub 11. It is supported.

前記外筒３の一端部すなわち開口端側には、当該外筒３の軸心に対して直交する方向へ移動可能な環状のロック片１５を備えた操作部材１７が設けられている。上記ロック片１５は、留置針１の使用前の状態においては前記内筒５及び内針ハブ９を不動状態にロック固定する作用をなすものである。   An operation member 17 having an annular lock piece 15 that is movable in a direction orthogonal to the axis of the outer cylinder 3 is provided at one end of the outer cylinder 3, that is, at the opening end side. The lock piece 15 functions to lock and fix the inner cylinder 5 and the inner needle hub 9 in a stationary state before the indwelling needle 1 is used.

すなわち、環状のロック片１５の下辺部は、前記内筒５の下側に形成した切欠き状の係止凹部５Ａ（図２参照）及びこの係止凹部５Ａを通過して、前記内針ハブ９の大径部の下側に形成した係止凹部９Ａに係合してある。したがって、前記内筒５と内針ハブ９は、留置針１の使用前の状態においては、ロック片１５がそれぞれの係止凹部５Ａ、９Ａに係合していることにより、前記ロック片１５を介して一体的に固定された状態にある。   That is, the lower side portion of the annular lock piece 15 passes through the notch-shaped locking recess 5A (see FIG. 2) formed on the lower side of the inner cylinder 5 and the locking recess 5A, so that the inner needle hub 9 is engaged with a locking recess 9A formed on the lower side of the large diameter portion. Therefore, when the indwelling needle 1 is in use, the inner cylinder 5 and the inner needle hub 9 are engaged with the locking recesses 5A and 9A so that the lock piece 15 is Through a fixed state.

そして、前記内筒５の先端側内面と前記内針ハブ９の前記大径部との間には、例えば圧縮したコイルスプリング等のごとき弾性部材１９が弾装してある。したがって、前記操作部材１７を押し下げて、前記内筒５の係止凹部５Ａ及び内針ハブ９の係止凹部９Ａからロック片１５の下辺部を離脱すると、圧縮された状態にある前記弾性部材１９が延びることとなり、前記内筒５は外筒３から突出するように移動され、内針ハブ９は外筒３の底部側へ移動されることになる。   An elastic member 19 such as a compressed coil spring is provided between the inner surface of the distal end side of the inner cylinder 5 and the large diameter portion of the inner needle hub 9. Accordingly, when the operating member 17 is pushed down to disengage the lower side of the locking piece 15 from the locking recess 5A of the inner cylinder 5 and the locking recess 9A of the inner needle hub 9, the elastic member 19 is in a compressed state. The inner cylinder 5 is moved so as to protrude from the outer cylinder 3, and the inner needle hub 9 is moved to the bottom side of the outer cylinder 3.

したがって、内針７は外筒３及び内筒５によって覆われるものである。すなわち、前記外筒３及び内筒５は前記内針７を覆う一種のカバーをなすものである。   Therefore, the inner needle 7 is covered with the outer cylinder 3 and the inner cylinder 5. That is, the outer cylinder 3 and the inner cylinder 5 form a kind of cover that covers the inner needle 7.

前記内針ハブ９には、図３に示すように、前記内針７の基端部に開口した小さな空間部２１が形成してあり、この空間部２１には細く長い紐状（線状、筋状の場合をも含むものとする）の血液モニター２３の一端部が挿入してあって、前記空間部２１の開口部を閉じる栓部材２５によって固定されている。なお、前記空間部２１の開口部を、例えばテーパ状に形成することにより、空間部２１に対する前記栓部材２５の挿入量を調整することにより、前記血液モニター２３の締付力を調整可能である。   As shown in FIG. 3, the inner needle hub 9 has a small space portion 21 opened at the proximal end portion of the inner needle 7, and the space portion 21 has a thin and long string shape (linear, One end of a blood monitor 23 (including a case of a streak) is inserted, and is fixed by a plug member 25 that closes the opening of the space 21. The tightening force of the blood monitor 23 can be adjusted by adjusting the amount of insertion of the plug member 25 into the space 21 by forming the opening of the space 21 in a tapered shape, for example. .

前記血液モニター２３は、吸水性を有しかつ柔軟な性質を有する部材、例えばフェルトによって構成してあり、針を患者の血管に穿刺したときの逆血による血液が前記空間部２１から外部へにじみ出ることができるように設けてある。なお、前記空間部２１から血液モニター２３を伝って外部へにじみ出る速度は、前記栓部材２５による締付力を予め調整しておくことにより調整可能である。   The blood monitor 23 is constituted by a member having water absorbability and a flexible property, for example, felt, and blood due to reverse blood oozes out from the space portion 21 when a needle is punctured into a blood vessel of a patient. It is provided so that it can. It should be noted that the speed of oozing out from the space 21 through the blood monitor 23 can be adjusted by adjusting the tightening force by the plug member 25 in advance.

以上のごとき構成において、図１に示すように、前記内筒５と内針ハブ９とが、前述したようにロック片１５によって一体的に固定された状態にあるときには、前記血液モニター２３は内筒５内において直線状に延びた状態にある。そして、針を患者の血管に穿刺すると、逆血により内針ハブ９の空間部（中空部）２１内に血液が流入する。   In the above configuration, as shown in FIG. 1, when the inner cylinder 5 and the inner needle hub 9 are integrally fixed by the lock piece 15 as described above, the blood monitor 23 is The cylinder 5 is in a state of extending linearly. When the needle is punctured into the blood vessel of the patient, blood flows into the space (hollow part) 21 of the inner needle hub 9 due to reverse blood.

前記空間部２１内の血液は血液モニター２３を介して外部ににじみ出るので、このときのにじみ速度を視認することにより、患者の血管の確保を確認することができる。そして、針先が血管を確保したことを確認した後、前述したように、操作部材１７を操作して内筒５と内針ハブ９との固定を解除すると、弾性部材１９の作用によって内針７は外針１３から抜き出されると共に、内筒５が外筒３から突出するように移動されることになる。   Since the blood in the space 21 oozes out to the outside through the blood monitor 23, the blood vessel of the patient can be confirmed by visually confirming the bleed speed at this time. Then, after confirming that the needle tip has secured the blood vessel, as described above, when the operation member 17 is operated to release the fixation between the inner cylinder 5 and the inner needle hub 9, the inner needle 5 is operated by the action of the elastic member 19. 7 is extracted from the outer needle 13 and moved so that the inner cylinder 5 protrudes from the outer cylinder 3.

上述のように、外針１３から内針７が抜き出され、かつ内筒５が外筒３から突出するように移動されると、前記血液モニター２３は、外筒３の底部と内針ハブ９との間に折り畳むように押し潰されることになる。そして、内筒５の先端部は内針７の先端部よりも突出して、内針７の先端部を覆って安全性を確保することになる。この際、外筒３から内筒５が突出した状態での全体の長さは、前記内針７の長さよりも僅かに長ければよいものであり、廃棄するときの全体的長さを短くすることができるものである。   As described above, when the inner needle 7 is extracted from the outer needle 13 and the inner cylinder 5 is moved so as to protrude from the outer cylinder 3, the blood monitor 23 is connected to the bottom of the outer cylinder 3 and the inner needle hub. 9 will be crushed so as to be folded. And the front-end | tip part of the inner cylinder 5 protrudes rather than the front-end | tip part of the inner needle 7, and covers the front-end | tip part of the inner needle 7, and ensures safety. At this time, the entire length in a state in which the inner cylinder 5 protrudes from the outer cylinder 3 only needs to be slightly longer than the length of the inner needle 7, and the entire length when discarded is shortened. It is something that can be done.

また、前記構成においては、細い紐状の血液モニター２３に血液がにじみ出ることにより、針先が患者の血管を確保したことを確認できるので、前記空間部２１の容量は、内針７の基端部と血液モニター２３とを接続するに充分な容量でよく、極めて小さくすることができるものである。したがって、内針ハブ９の径を小さく、又長さを短くすることができ、留置針１全体を細く短くすることができ、穿刺し易くなるものである。   Moreover, in the said structure, since the blood oozes out to the thin string-shaped blood monitor 23, it can confirm that the needle tip secured the patient's blood vessel, Therefore The capacity | capacitance of the said space part 21 is the base end of the inner needle 7. The capacity may be sufficient to connect the blood monitor 23 and the blood monitor 23, and can be extremely small. Therefore, the diameter of the inner needle hub 9 can be made small and the length thereof can be shortened, and the entire indwelling needle 1 can be made thin and short, which makes it easy to puncture.

さらに、前記構成においては、血液モニター２３に対して血液がにじみ出る速度を調整可能であるから、患者の出血量を少なく抑制することができるものである。   Furthermore, in the said structure, since the speed at which blood oozes out with respect to the blood monitor 23 can be adjusted, a patient's bleeding amount can be suppressed small.

本発明の実施形態に係る留置針の使用前の状態を示す説明図である。It is explanatory drawing which shows the state before use of the indwelling needle which concerns on embodiment of this invention. 内針を廃棄する場合の状態を示す説明図である。It is explanatory drawing which shows the state in the case of discarding an inner needle. 使用前の内針及び血液モニターの状態を示す説明図である。It is explanatory drawing which shows the state of the inner needle and blood monitor before use. 使用後の廃棄時の血液モニターの状態を示す説明図である。It is explanatory drawing which shows the state of the blood monitor at the time of the discard after use. 従来の留置針の構成を示す説明図である。It is explanatory drawing which shows the structure of the conventional indwelling needle.

符号の説明Explanation of symbols

１…留置針
３…外筒
５…内筒
７…内針
９…内針ハブ
１３…外針
１７…操作部材
１９…弾性部材
２１…空間部
２３…血液モニター
２５…栓部材 DESCRIPTION OF SYMBOLS 1 ... Indwelling needle 3 ... Outer cylinder 5 ... Inner cylinder 7 ... Inner needle 9 ... Inner needle hub 13 ... Outer needle 17 ... Operation member 19 ... Elastic member 21 ... Space part 23 ... Blood monitor 25 ... Plug member

Claims (4)

内針、外針及び使用後の内針を覆うカバーを備えてなる留置針において、前記内針の基端部を支持した内針ハブに、前記内針を患者に穿刺したときの血液を吸収する吸水性を備えかつ柔軟な血液モニターを備えていることを特徴とする留置針。   In an indwelling needle comprising an inner needle, an outer needle, and a cover that covers the used inner needle, the inner needle hub that supports the proximal end of the inner needle absorbs blood when the inner needle is punctured into a patient. An indwelling needle characterized by having a water absorption and a flexible blood monitor. 請求項１に記載の留置針において、前記血液モニターに対して血液がにじむ速度を調整可能な構成としてなることを特徴とする留置針。   The indwelling needle according to claim 1, wherein the indwelling needle is configured to be capable of adjusting a speed at which blood oozes with respect to the blood monitor. 請求項１又は２に記載の留置針において、前記血液モニターは、細く長い紐状に形成してあることを特徴とする留置針。   The indwelling needle according to claim 1 or 2, wherein the blood monitor is formed in a thin and long string shape. 請求項１，２又は３に記載の留置針において、前記カバーは伸縮可能の構成であることを特徴とする留置針。

4. The indwelling needle according to claim 1, 2, or 3, wherein the cover is configured to be extendable.

JP2004143931A 2004-05-13 2004-05-13 Indwelling needle Expired - Lifetime JP4403013B2 (en)

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CN103157153A (en) * 2011-12-15 2013-06-19 广东康尔美医疗器械有限公司 Safe venous indwelling needle used for preventing thrombus
JP2022050681A (en) * 2015-05-15 2022-03-30 シー・アール・バード・インコーポレーテッド Catheter placement device including extensible needle safety component
WO2024070977A1 (en) * 2022-09-26 2024-04-04 テルモ株式会社 Blood backflow suppression device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012517328A (en) * 2009-02-12 2012-08-02 ベクトン・ディキンソン・アンド・カンパニー Arterial flashback confirmation chamber
CN102049073A (en) * 2010-11-04 2011-05-11 陈永曦 Enclosed type blood pollution prevention detaining needle guide tube component
CN103157153A (en) * 2011-12-15 2013-06-19 广东康尔美医疗器械有限公司 Safe venous indwelling needle used for preventing thrombus
JP2022050681A (en) * 2015-05-15 2022-03-30 シー・アール・バード・インコーポレーテッド Catheter placement device including extensible needle safety component
JP7334282B2 (en) 2015-05-15 2023-08-28 シー・アール・バード・インコーポレーテッド Catheter placement device including extendable needle safety component
WO2024070977A1 (en) * 2022-09-26 2024-04-04 テルモ株式会社 Blood backflow suppression device

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