WO2018181728A1 - Indwelling needle assembly - Google Patents
Indwelling needle assembly Download PDFInfo
- Publication number
- WO2018181728A1 WO2018181728A1 PCT/JP2018/013286 JP2018013286W WO2018181728A1 WO 2018181728 A1 WO2018181728 A1 WO 2018181728A1 JP 2018013286 W JP2018013286 W JP 2018013286W WO 2018181728 A1 WO2018181728 A1 WO 2018181728A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- switch
- inner needle
- needle
- base
- needle base
- Prior art date
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M25/00—Catheters; Hollow probes
- A61M25/01—Introducing, guiding, advancing, emplacing or holding catheters
- A61M25/06—Body-piercing guide needles or the like
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
Abstract
Provided is an indwelling needle assembly that allows a more stable procedure to be carried out without malfunctioning. An indwelling needle assembly 1 is configured such that a casing 5 is held while an inner needle 3 and outer needle 21 pierce a target site, and then an inner cylinder operation part 66 of an inner cylinder 6 is pressed in the leading end direction with the thumb or index finger of the hand holding the casing 5, thereby further sending only the outer needle 21 into the blood vessel and making it possible to cancel the prevention of oscillation of an inner needle base 4. By merely pulling a switch operation part 74 of a switch 7 in the base end direction, the inner needle base 4 is oscillated, thereby releasing support of the inner needle base 4 against a compression spring S (energizing member), the compression spring S causes the inner needle base 4 to move in the base end direction, and the inner needle 3 is then housed inside the casing 5.
Description
本発明は、血管等に穿刺されて輸液ライン等との接続に用いられる留置針を備える留置針組立体に関する。
The present invention relates to an indwelling needle assembly including an indwelling needle that is punctured into a blood vessel or the like and used for connection with an infusion line or the like.
従来、外針に内針を挿入し、内針に案内させて外針を血管等に穿刺した後、内針を抜去して留置された外針に輸液ラインを接続するようにした留置針が知られている。しかし、従来の留置針では外針から内針を抜去する際に、血管に留置した外針から患者の血液が流出して医師や看護師に付着したり、抜去した内針を医師や看護師に誤って穿刺したりすることがある。
Conventionally, there is an indwelling needle that inserts an inner needle into an outer needle, guides the inner needle to puncture the outer needle into a blood vessel, etc., and then removes the inner needle and connects the infusion line to the placed outer needle. Are known. However, with the conventional indwelling needle, when the inner needle is removed from the outer needle, the patient's blood flows out from the outer needle placed in the blood vessel and adheres to the doctor or nurse, or the removed inner needle is attached to the doctor or nurse. In some cases, puncture may occur accidentally.
そこで、管状の外針及び該外針の基端部が固定される外針基と、前記外針及び外針基の内部に挿通可能な内針及び該内針の基端部が固定される内針基と、前記内針基を軸方向及び径方向に移動可能に収納する筒状の筐体と、前記外針基を取外し自在に保持し、前記筐体に対して所定の第１位置から前記外針の針先方向の第２位置まで移動可能な移動部材と、前記内針基を前記筐体の基端方向へ付勢するバネとを備える留置針組立体が知られている（例えば特許文献１参照）。
Therefore, the tubular outer needle and the outer needle base to which the proximal end portion of the outer needle is fixed, the inner needle that can be inserted into the outer needle and the outer needle base, and the proximal end portion of the inner needle are fixed. An inner needle base, a cylindrical housing for accommodating the inner needle base so as to be movable in an axial direction and a radial direction, and the outer needle base being detachably held, and a predetermined first position with respect to the housing An indwelling needle assembly is known that includes a moving member that can move from the outer needle to a second position in the needle tip direction of the outer needle and a spring that biases the inner needle base toward the proximal end of the housing ( For example, see Patent Document 1).
この留置針組立体において、前記移動部材は、前記第１位置にあるときに前記筐体内での前記内針基の径方向の移動を阻止する移動阻止部と、前記第２位置にあるときに前記内針基を前記筐体内で径方向に押圧して径方向に移動させる押圧部とを有する。
In the indwelling needle assembly, when the moving member is in the second position, the movement preventing portion prevents the inner needle base from moving in the radial direction in the housing when the moving member is in the first position. A pressing portion that presses the inner needle base in the radial direction in the housing and moves the inner needle base in the radial direction.
これにより、この留置針組立体では、前記内針基は、前記移動部材が前記第１位置にあるときは、前記バネによる付勢力に抗して前記筐体の前方位置に係止されると共に、前記移動阻止部によって径方向への移動が阻止される。一方、前記移動部材が前記第２位置に移動されたときは、前記内針基の前記移動阻止部による径方向への移動阻止が解除され、前記内針基が前記押圧部により前記筐体内で径方向に押圧されて径方向に移動されることにより前記筐体との係止が解除され、前記バネの付勢力により前記筐体の基端方向に移動され、前記内針の先端部が前記筐体内に収容される。
Thereby, in this indwelling needle assembly, when the moving member is in the first position, the inner needle base is locked at the front position of the housing against the urging force of the spring. The movement preventing portion prevents movement in the radial direction. On the other hand, when the moving member is moved to the second position, the movement prevention portion of the inner needle base in the radial direction by the movement prevention portion is released, and the inner needle base is moved inside the casing by the pressing portion. By being pressed in the radial direction and moved in the radial direction, the engagement with the casing is released, and the urging force of the spring is moved in the proximal direction of the casing, and the distal end portion of the inner needle is Housed in a housing.
したがって、この留置針組立体によれば、抜去された内針は筐体に収納されるので、外針から内針を抜去する際の血液飛散、及び医師や看護師に対する内針の誤穿刺を防止することができる。
Therefore, according to this indwelling needle assembly, the removed inner needle is housed in the housing, so that blood scattering when the inner needle is removed from the outer needle and erroneous puncture of the inner needle to the doctor or nurse are prevented. Can be prevented.
しかしながら、特許文献１の留置針組立体は、前記移動部材を前記第２位置に移動させるとバネによって内針の後退を発動するため、該移動部材を前記第２位置に移動させて外針だけを体内に挿入し位置決めをする途中で、誤って内針の後退が発動されるという不都合がある。
However, in the indwelling needle assembly of Patent Document 1, when the moving member is moved to the second position, the inner needle is moved backward by a spring. Therefore, only the outer needle is moved by moving the moving member to the second position. There is an inconvenience that the inner needle is retracted by mistake during the positioning of the needle in the body.
以上に鑑み、本発明は、かかる従来技術の問題点に鑑み、誤作動を防止しつつより安定した手技を行うことができる留置針組立体を提供することを目的とする。
In view of the above, an object of the present invention is to provide an indwelling needle assembly capable of performing a more stable procedure while preventing malfunctions in view of the problems of the related art.
本発明に係る留置針組立体は、管状の外針と、該外針の基端部が固定される外針基と、前記外針及び外針基の内部に挿通可能な内針と、該内針の基端部が固定される内針基と、前記内針基を軸方向及び径方向に移動可能に収納する筒状の筐体と、先端部において前記外針基を取外し自在に保持し、前記筐体に対して所定の第１位置から前記外針の針先方向の第２位置まで移動可能な移動部材と、前記内針基を前記筐体の基端方向へ付勢する付勢部材と、前記筐体に対して所定の第３位置から前記外針の針先と反対方向の第４位置まで移動可能なスイッチとを備え、前記移動部材は、前記第１位置にあるときに前記筐体内での前記内針基の径方向の移動を阻止する移動阻止部を有し、前記内針基は、前記移動部材が前記第１位置にあるときは、前記付勢部材による付勢力に抗して前記筐体に係止されると共に、前記移動阻止部によって径方向への移動が阻止され、前記移動部材が前記第２位置に移動されたときは、前記移動阻止部による径方向への移動阻止が解除され、前記スイッチは、前記第４位置にあるときに前記内針基を前記筐体内で径方向に押圧して径方向に移動させる押圧部を有し、前記内針基は、前記押圧部により前記筐体内で径方向に押圧されて径方向に移動されることにより前記筐体との係止が解除され、前記付勢部材の付勢力により前記筐体の基端方向に移動され、前記内針の先端部が前記筐体内に収容されることを特徴とする。
An indwelling needle assembly according to the present invention includes a tubular outer needle, an outer needle base to which a proximal end portion of the outer needle is fixed, an inner needle that can be inserted into the outer needle and the outer needle base, An inner needle base to which the proximal end portion of the inner needle is fixed, a cylindrical housing that accommodates the inner needle base so as to be movable in the axial direction and the radial direction, and the outer needle base is detachably held at the distal end portion. A movable member that can move from a predetermined first position to a second position in the needle tip direction of the outer needle with respect to the housing; and an urging force that biases the inner needle base toward the proximal end of the housing. A biasing member and a switch that is movable with respect to the housing from a predetermined third position to a fourth position in a direction opposite to the needle tip of the outer needle, and the moving member is in the first position. The inner needle base has a movement blocking portion for blocking the movement of the inner needle base in the radial direction, and the inner needle base has the movement member in the first position. When it is locked to the housing against the urging force by the urging member, the movement preventing portion is prevented from moving in the radial direction, and the moving member is moved to the second position, The movement blocking portion in the radial direction is released by the movement blocking portion, and the switch has a pressing portion that moves the radial direction by pressing the inner needle base in the casing in the radial direction when the switch is in the fourth position. The inner needle base is released in the radial direction in the casing by the pressing portion and moved in the radial direction to release the engagement with the casing, and the biasing force of the biasing member The distal end portion of the inner needle is accommodated in the housing by being moved in the proximal direction of the housing.
本発明によれば、筐体を保持して対象部位に内針及び外針を穿刺した後、移動部材を第２位置へ移動させて外針のみを前進させるだけで内針基の径方向への移動阻止を解除することができる。
According to the present invention, after holding the housing and puncturing the inner needle and the outer needle in the target site, the moving member is moved to the second position and only the outer needle is advanced to move in the radial direction of the inner needle base. The movement prevention can be released.
次いで、スイッチを第４位置に移動させる操作を行うだけで、内針基と筐体との係止が解除され、付勢部材により筐体の基端方向へ移動されるので、格別の操作を要することなく内針を筐体内に収納することができる。
Next, simply by performing an operation to move the switch to the fourth position, the lock between the inner needle base and the housing is released, and the biasing member moves the proximal end of the housing. The inner needle can be stored in the housing without need.
このとき、内針基の径方向への移動阻止の解除と、内針基と筐体との係止の解除とが、移動部材とスイッチとの操作に夫々分けられているため、誤って内針の後退が発動され、予期せぬ衝撃が生じることを防止できる。また、移動部材及びスイッチは、いずれも外針の軸線方向に沿って移動されるため、手技の際に外針の針先が径方向にぶれることを防止できる。
At this time, release of movement prevention of the inner needle base in the radial direction and release of engagement between the inner needle base and the housing are divided into operations of the moving member and the switch, respectively. The retraction of the needle is activated, and an unexpected impact can be prevented. In addition, since both the moving member and the switch are moved along the axial direction of the outer needle, the needle tip of the outer needle can be prevented from shaking in the radial direction during the procedure.
したがって、本発明によれば、バネによって内針を筐体内に収納する際に、誤作動を防止しつつ、より安定した手技を行うことができる。
Therefore, according to the present invention, when the inner needle is housed in the housing by the spring, a more stable procedure can be performed while preventing malfunction.
また、本発明において、前記内針基の外周面には、前記筐体に係止される被係止部と、前記被係止部より基端側に前記スイッチの押圧部で押圧される被押圧部とが夫々形成され、前記筐体の内周面には、前記被係止部を係止する係止部と、前記係止部より先端側に前記内針基を支持する支持部とが夫々形成され、前記付勢部材は、前記筐体の支持部と前記内針基の被係止部との間に挟持され、前記スイッチの押圧部は前記筐体内に挿入されて前記内針基の被係止部と前記内針基の被押圧部との間に配置され、前記内針基の被押圧部と前記スイッチの押圧部との互いに対向する面の少なくとも一方には、前記内針基を前記筐体内で径方向に押圧して径方向に移動させる傾斜面が形成され、前記移動部材は、前記移動阻止部が前記内針基を挟んで前記押圧部の反対側に配置されることが好ましい。
Further, in the present invention, on the outer peripheral surface of the inner needle base, a locked portion to be locked to the housing, and a target to be pressed by the pressing portion of the switch on the proximal side from the locked portion. A pressing portion is formed on each inner peripheral surface of the housing; a locking portion that locks the locked portion; and a support portion that supports the inner needle base on the distal side of the locking portion. The biasing member is sandwiched between a support portion of the casing and a locked portion of the inner needle base, and the pressing portion of the switch is inserted into the casing to be inserted into the inner needle. Between the locked portion of the base and the pressed portion of the inner needle base and at least one of the opposed surfaces of the pressed portion of the inner needle base and the pressing portion of the switch An inclined surface for moving the needle base in the radial direction by pressing the needle base in the radial direction is formed, and in the moving member, the movement blocking portion sandwiches the inner needle base. It is preferably positioned on the opposite side of the pressing portion.
これによれば、上述した留置針組立体を簡易な構成で実現できるとともに、スイッチの押圧部を前記筐体内に挿入して、内針基の被係止部及び被押圧部の間に配置することで、筐体の支持部、付勢部材、内針基の被係止部、筐体の係止部、スイッチの押圧部、内針基の被押圧部の順で配置できるので留置針組立体の全長を短くすることができる。
According to this, the indwelling needle assembly described above can be realized with a simple configuration, and the pressing portion of the switch is inserted into the housing and disposed between the locked portion and the pressed portion of the inner needle base. Therefore, the indwelling needle assembly can be arranged in the order of the support portion of the housing, the urging member, the locked portion of the inner needle base, the locking portion of the housing, the pressing portion of the switch, and the pressed portion of the inner needle base. The total length of the solid can be shortened.
また、本発明において、前記移動部材は、該移動部材を前記第１位置から前記第２位置まで移動させる際に指掛け可能な移動部材操作部を有し、前記スイッチは、該スイッチを前記第３位置から前記第４位置まで移動させる際に指掛け可能なスイッチ操作部を有し、前記第１位置における移動部材操作部の基端側に隣接して、前記第３位置における前記スイッチ操作部が配置されることが好ましい。
In the present invention, the moving member has a moving member operation unit that can be hooked when the moving member is moved from the first position to the second position, and the switch connects the switch to the third position. A switch operating portion that can be fingered when moving from a position to the fourth position, and the switch operating portion at the third position is disposed adjacent to a proximal end side of the moving member operating portion at the first position. It is preferred that
これによれば、筐体を保持して対象部位に内針及び外針を穿刺した後、例えば、筐体を保持している手の親指又は人差し指を移動部材操作部に掛けて先端方向の第２位置まで移動させた後、その指を戻して、元の第２位置に隣接されたスイッチ操作部に指を掛けて基端方向に引く動作をすることで、内針を抜去して筐体に収納することができる。したがって、手技の際に、複数の手指を用いたり、持ち直したりする動作が不要となるので、操作を容易に行うことができる。
According to this, after holding the housing and puncturing the target part with the inner needle and the outer needle, for example, the thumb or index finger of the hand holding the housing is hung on the moving member operation unit, and the distal direction first After moving to the second position, the finger is returned, the finger is put on the switch operation part adjacent to the original second position and pulled in the proximal direction, thereby removing the inner needle and housing Can be stored. Therefore, the operation of using a plurality of fingers or picking them up during the procedure is unnecessary, and the operation can be easily performed.
また、本発明において、前記移動部材は、該移動部材を前記第１位置から前記第２位置まで移動させる際に指掛け可能な移動部材操作部を有し、前記スイッチは、該スイッチを前記第３位置から前記第４位置まで移動させる際に指掛け可能なスイッチ操作部を有し、
第３位置における前記スイッチ操作部は、第１位置における前記移動部材操作部と第２位置における前記移動部材操作部との間に配置されるように構成してもよい。 In the present invention, the moving member has a moving member operation unit that can be hooked when the moving member is moved from the first position to the second position, and the switch connects the switch to the third position. A switch operation unit that can be hooked when moving from a position to the fourth position
You may comprise the said switch operation part in a 3rd position so that it may be arrange | positioned between the said movement member operation part in a 1st position, and the said movement member operation part in a 2nd position.
第３位置における前記スイッチ操作部は、第１位置における前記移動部材操作部と第２位置における前記移動部材操作部との間に配置されるように構成してもよい。 In the present invention, the moving member has a moving member operation unit that can be hooked when the moving member is moved from the first position to the second position, and the switch connects the switch to the third position. A switch operation unit that can be hooked when moving from a position to the fourth position
You may comprise the said switch operation part in a 3rd position so that it may be arrange | positioned between the said movement member operation part in a 1st position, and the said movement member operation part in a 2nd position.
これによれば、筐体を保持して対象部位に内針及び外針を穿刺した後、例えば、筐体を保持している手の親指又は人差し指を移動部材操作部に掛けて先端方向の第２位置まで移動させた後、その指を戻す際に、スイッチ操作部に指を掛けて基端方向に引くことで、内針を抜去して筐体に収納することができる。したがって、手技の際に、複数の手指を用いたり、持ち直したりする動作が不要となるので、操作を容易に行うことができる。
According to this, after holding the housing and puncturing the target part with the inner needle and the outer needle, for example, the thumb or index finger of the hand holding the housing is hung on the moving member operation unit, and the distal direction first After moving to the second position, when returning the finger, the inner needle can be removed and stored in the housing by pulling the finger on the switch operating portion and pulling in the proximal direction. Therefore, the operation of using a plurality of fingers or picking them up during the procedure is unnecessary, and the operation can be easily performed.
さらに、第３位置における前記スイッチ操作部を、第１位置における前記移動部材操作部と第２位置における前記移動部材操作部との間に配置する場合、前記移動部材操作部は、前記移動部材から前記径方向に延びる柱部と、該柱部から前記軸方向及び前記径方向に交わる方向に延設された庇部とを有し、前記第１位置において前記スイッチ操作部を該庇部の収納可能であることが好ましい。
Furthermore, when the switch operation unit at the third position is disposed between the movement member operation unit at the first position and the movement member operation unit at the second position, the movement member operation unit is separated from the movement member. A column portion extending in the radial direction; and a flange portion extending in a direction intersecting the axial direction and the radial direction from the column portion, and storing the switch operation portion in the first position. Preferably it is possible.
これによれば、第３位置における前記スイッチ操作部は、前記移動部材操作部の庇部により覆われているため、誤作動を防止することができる。
According to this, since the switch operation part in the third position is covered with the collar part of the moving member operation part, malfunction can be prevented.
また、本発明において、前記移動部材は、前記筐体及び前記スイッチの少なくとも一方によって径方向の回転が抑制されることが好ましい。
In the present invention, it is preferable that the moving member is prevented from rotating in a radial direction by at least one of the casing and the switch.
さらに、本発明において、前記移動部材は、片持ち梁状の形状を備えた切れ込みを形成することで、前記第２位置へ移動した後、再度第１位置に戻る事を抑制されるように構成されることが好ましい。
Further, in the present invention, the moving member is configured to form a notch having a cantilever-like shape so that the moving member is prevented from returning to the first position again after moving to the second position. It is preferred that
以下、図面を用いて本発明の実施形態を説明する。図１は本発明の一実施形態に係る留置針組立体の分解斜視図である。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of an indwelling needle assembly according to an embodiment of the present invention.
図１に示すように、留置針組立体１は、対象部位に留置される留置部２と、留置部２に挿入される内針３と、内針３の基端部が固定される内針基４と、内針基４を軸方向及び径方向に移動可能に収納して保持する筐体５と、筐体５に対し、所定の第１位置から留置部２の針先方向の第２位置まで摺動し得るように取り付けられる内筒６と、筐体５の基端方向へ内針基４を付勢する圧縮スプリングＳと、筐体５に対して所定の第３位置から留置部２の針先と反対方向の第４位置まで摺動しうるように取り付けられるスイッチ７とを備える。
As shown in FIG. 1, an indwelling needle assembly 1 includes an indwelling part 2 to be indwelled at a target site, an inner needle 3 to be inserted into the indwelling part 2, and an inner needle to which a proximal end portion of the inner needle 3 is fixed. The base 4, the housing 5 that stores and holds the inner needle base 4 so as to be movable in the axial direction and the radial direction, and the second in the needle tip direction of the indwelling portion 2 from the predetermined first position with respect to the housing 5. An inner cylinder 6 that is mounted so as to be slidable to a position, a compression spring S that biases the inner needle base 4 toward the proximal end of the housing 5, and a detained portion from a predetermined third position with respect to the housing 5 And a switch 7 attached so as to be slidable to a fourth position in the direction opposite to the needle tip of the second needle.
内筒６は、本発明における移動部材を構成する。また、圧縮スプリングＳは、本発明における付勢部材を構成する。なお、第１位置は、後述するように、図７Ａにおける内筒６の位置であり、第２位置は、図７Ｂ乃至７Ｄにおける内筒６の位置である。また、第３位置は、図７Ａ及び図７Ｂにおけるスイッチ７の位置であり、第４位置は、図７Ｃ及び図７Ｄにおけるスイッチ７の位置である。
The inner cylinder 6 constitutes a moving member in the present invention. The compression spring S constitutes an urging member in the present invention. As will be described later, the first position is the position of the inner cylinder 6 in FIG. 7A, and the second position is the position of the inner cylinder 6 in FIGS. 7B to 7D. The third position is the position of the switch 7 in FIGS. 7A and 7B, and the fourth position is the position of the switch 7 in FIGS. 7C and 7D.
留置部２は、管状の外針２１と、外針２１の基端部が固定された外針基２２とを備える。外針２１は、先端部に削ぎ竹状の穿刺部２１ａを備える。
The indwelling unit 2 includes a tubular outer needle 21 and an outer needle base 22 to which a proximal end portion of the outer needle 21 is fixed. The outer needle 21 includes a shaving bamboo-like puncture portion 21a at the tip.
内針３は、その先端が外針２１の先端から突出するように、外針２１及び外針基２２の内部に挿入される。
The inner needle 3 is inserted into the outer needle 21 and the outer needle base 22 so that the tip protrudes from the tip of the outer needle 21.
筐体５は、外筒８と、外筒８に固定されるストッパ９とを備える。筐体５の先端部には、プロテクタ１０が取り付けられ、留置部２や内針３が保護される。
The housing 5 includes an outer cylinder 8 and a stopper 9 fixed to the outer cylinder 8. A protector 10 is attached to the distal end portion of the housing 5 to protect the indwelling portion 2 and the inner needle 3.
図２は、内針基４の詳細を示す。図２Ａは平面図、図２Ｂは正面図、図２Ｃは図２ＡのＣ－Ｃ断面図である。
FIG. 2 shows the details of the inner needle base 4. 2A is a plan view, FIG. 2B is a front view, and FIG. 2C is a sectional view taken along the line CC of FIG. 2A.
図２に示すように、内針基４は、内針３が挿入されて固定される中空円筒状の内針固定部４１と、内針固定部４１の基端側に隣接し、内針固定部４１よりも径が大きい中空円筒状のフィルタ挿入部４２とを備える。
As shown in FIG. 2, the inner needle base 4 is adjacent to the proximal end side of the hollow needle-shaped inner needle fixing portion 41 to which the inner needle 3 is inserted and fixed, and the inner needle fixing portion 41. A hollow cylindrical filter insertion portion 42 having a diameter larger than that of the portion 41.
内針固定部４１からフィルタ挿入部４２へ移行する部分は、後述する突出部とともに、圧縮スプリングＳにより押圧される段差部４３となっている。
The part which transfers to the filter insertion part 42 from the inner needle fixing | fixed part 41 is the level | step-difference part 43 pressed by the compression spring S with the protrusion part mentioned later.
フィルタ挿入部４２の上部かつ先端側には、内針基４の軸線に直交する方向に沿って延在する被係止部４４が設けられている。被係止部４４の先端面は、段差部４３と面一になっている。
A locked portion 44 extending along a direction orthogonal to the axis of the inner needle base 4 is provided on the top and the distal end side of the filter insertion portion 42. The front end surface of the locked portion 44 is flush with the stepped portion 43.
フィルタ挿入部４２の上部かつ基端側には、スイッチ７が第３位置から第４位置へ移動されるときに該スイッチ７により下方へ押下される突出部４５が設けられている。突出部４５には、該押下を可能にするための傾斜面４５ａが設けられる。突出部４５は、本発明における被押圧部を構成する。
A protrusion 45 that is pushed downward by the switch 7 when the switch 7 is moved from the third position to the fourth position is provided on the upper side and the base end side of the filter insertion portion 42. The protruding portion 45 is provided with an inclined surface 45a for enabling the pressing. The protrusion part 45 comprises the to-be-pressed part in this invention.
フィルタ挿入部４２で生じる血液のフラッシュバックを視認できるように、フィルタ挿
入部４２の周囲は透明の部材で構成される。フィルタ挿入部４２には、気体のみを通過させ、液体の通過を抑制するフィルタ（散気栓）４６（図１）が挿入される。 The periphery of thefilter insertion portion 42 is made of a transparent member so that the blood flashback generated at the filter insertion portion 42 can be visually recognized. A filter (aeration plug) 46 (FIG. 1) that allows only gas to pass and suppresses passage of liquid is inserted into the filter insertion portion 42.
入部４２の周囲は透明の部材で構成される。フィルタ挿入部４２には、気体のみを通過させ、液体の通過を抑制するフィルタ（散気栓）４６（図１）が挿入される。 The periphery of the
図３は、ストッパ９の詳細を示す。図３Ａは平面図、図３Ｂは正面図、図３Ｃは左側面図、図３Ｄは右側面図、図３Ｅは底面図、図３Ｆは図３ＡのＦ－Ｆ断面図である。
FIG. 3 shows details of the stopper 9. 3A is a plan view, FIG. 3B is a front view, FIG. 3C is a left side view, FIG. 3D is a right side view, FIG. 3E is a bottom view, and FIG. 3F is a sectional view taken along line FF in FIG.
図３に示すように、ストッパ９は、略円筒状の底面側が切り欠かれて開口している部分円筒部９１と、該部分円筒部９１の先端を閉塞する天板部９２と、基端を閉塞する底板部９３とを有する。
As shown in FIG. 3, the stopper 9 includes a partial cylindrical portion 91 that is opened by cutting out a substantially cylindrical bottom surface side, a top plate portion 92 that closes the distal end of the partial cylindrical portion 91, and a base end. And a bottom plate portion 93 to be closed.
部分円筒部９１の外径は内筒６の内径と同程度乃至それより若干小さい大きさを有し、かつ、部分円筒部９１の内径は内針基４と同程度乃至それより若干大きい大きさを有する。
The outer diameter of the partial cylindrical portion 91 is the same as or slightly smaller than the inner diameter of the inner cylinder 6, and the inner diameter of the partial cylindrical portion 91 is the same as or slightly larger than the inner needle base 4. Have
部分円筒部９１の上方かつ先端側には、長手方向に沿って延びる矩形状のストッパスリット部９４が形成されている。
A rectangular stopper slit portion 94 extending along the longitudinal direction is formed above and on the tip side of the partial cylindrical portion 91.
部分円筒部９１には、ストッパスリット部９４の先端側に隣接して、内針基４の被係止部４４が嵌合された状態で係止される係止収納部９５が形成されている。係止収納部９５の基端側面は、被係止部４４の先端面を支持し、かつ内針基４が後述の支持解除位置まで揺動されたときに該支持が解除される係止部９５ａを構成する。
The partial cylindrical portion 91 is formed adjacent to the distal end side of the stopper slit portion 94 with a locking storage portion 95 that is locked in a state where the locked portion 44 of the inner needle base 4 is fitted. . The base end side surface of the locking storage portion 95 supports the distal end surface of the locked portion 44, and the locking portion is released when the inner needle base 4 is swung to a support releasing position described later. 95a is configured.
部分円筒部９１の上部には、ストッパスリット部９４の基端側に隣接して、後述する内筒６の内筒スリット部６３に摺動可能に嵌合する凸部９６が設けられている。
On the upper part of the partial cylindrical portion 91, a convex portion 96 is provided adjacent to the proximal end side of the stopper slit portion 94 and slidably fitted into an inner cylinder slit portion 63 of the inner cylinder 6 described later.
天板部９２は、円環状かつ平板状の部材として構成される。該円環の軸線は、筐体５の軸線に一致する。
The top plate portion 92 is configured as an annular and flat plate member. The axis of the ring coincides with the axis of the housing 5.
天板部９２の中央部には、内針基４の内針固定部４１が遊嵌される円形貫通孔９２ａが形成されている。円形貫通孔９２ａの孔径は、内針固定部４１の外径より若干大きく構成されているので、円形貫通孔９２ａは、内針基４が基端方向へ抜去し得るように、かつ、内針基４の基端側が後述する所定の支持位置から支持解除位置まで揺動して径方向へ移動し得るように、内針基４の先端側を緩く支持する。
A circular through-hole 92 a into which the inner needle fixing portion 41 of the inner needle base 4 is loosely fitted is formed at the center of the top plate portion 92. Since the hole diameter of the circular through hole 92a is slightly larger than the outer diameter of the inner needle fixing portion 41, the circular through hole 92a is formed so that the inner needle base 4 can be removed in the proximal direction and the inner needle. The distal end side of the inner needle base 4 is loosely supported so that the proximal end side of the base 4 can swing from a predetermined support position described later to a support release position and move in the radial direction.
天板部９２基端側の面は、圧縮スプリングＳの先端を支持する支持部９２ｂとなっている。天板部９２の下方には、後述する内筒６の揺動阻止部６５に対応する凹部９２ｃが形成されている。
The surface on the base end side of the top plate portion 92 is a support portion 92b that supports the tip of the compression spring S. A concave portion 92c corresponding to a rocking prevention portion 65 of the inner cylinder 6 described later is formed below the top plate portion 92.
底板部９３は、部分円筒部９１の外径より大径な円盤状かつ平板状の部材として構成される。該円盤の軸線は、筐体５の軸線に一致する。底板部９３の基端面には、筐体５の軸線と上下方向とを含む平面と平行に延びる一対の爪部９３ａが、該軸線を挟み隣接して設けられている。
The bottom plate portion 93 is configured as a disk-like and flat plate-like member having a diameter larger than the outer diameter of the partial cylindrical portion 91. The axis of the disk coincides with the axis of the housing 5. On the base end surface of the bottom plate portion 93, a pair of claw portions 93a extending in parallel with a plane including the axis of the housing 5 and the vertical direction are provided adjacent to each other with the axis interposed therebetween.
図４は、内筒６の詳細を示す。図４Ａは平面図、図４Ｂは正面図、図４Ｃは左側面図、図４Ｄは右側面図、図４Ｅは図４ＡのＥ－Ｅ断面図である。
FIG. 4 shows details of the inner cylinder 6. 4A is a plan view, FIG. 4B is a front view, FIG. 4C is a left side view, FIG. 4D is a right side view, and FIG. 4E is an EE cross-sectional view of FIG.
図４に示すように、内筒６は、中空円筒状の外針基取付部６１と、外針基取付部６１の基端側で隣接し、外針基取付部６１より大径な中空円筒状の円筒部６２とを備える。外針基取付部６１と円筒部６２とは連通し、それらの軸線はいずれも筐体５の軸線に一致する。
As shown in FIG. 4, the inner cylinder 6 is a hollow cylindrical outer needle base mounting portion 61 that is adjacent to the proximal end side of the outer needle base mounting portion 61 and has a larger diameter than the outer needle base mounting portion 61. The cylindrical part 62 of a shape is provided. The outer needle base attachment portion 61 and the cylindrical portion 62 communicate with each other, and their axes coincide with the axis of the housing 5.
外針基取付部６１の外周面は、外針基２２の基端部が外嵌されて取外し自在に取り付けられる。また、外針基取付部６１の内周面は、内針基４の内針固定部４１が進退可能に挿入される。
The outer peripheral surface of the outer needle base mounting portion 61 is detachably mounted with the base end portion of the outer needle base 22 being externally fitted. Further, the inner needle fixing portion 41 of the inner needle base 4 is inserted into the inner peripheral surface of the outer needle base attaching portion 61 so as to advance and retreat.
円筒部６２の内径は、ストッパ９の部分円筒部９１の外径より大、かつ、ストッパ９の底板部９３の径より小である。円筒部６２の外径は、ストッパ９の底板部９３の径と同程度の大きさを有する。この結果、円筒部６２は、ストッパ９が基端部側から進退可能に挿入され、内筒６の基端と底板部９３の先端側面とが接することで、それ以上の該挿入が抑制される。
The inner diameter of the cylindrical portion 62 is larger than the outer diameter of the partial cylindrical portion 91 of the stopper 9 and smaller than the diameter of the bottom plate portion 93 of the stopper 9. The outer diameter of the cylindrical portion 62 is approximately the same as the diameter of the bottom plate portion 93 of the stopper 9. As a result, the cylindrical portion 62 is inserted so that the stopper 9 can be advanced and retracted from the base end side, and the base end of the inner cylinder 6 and the tip side surface of the bottom plate portion 93 are in contact with each other, so that further insertion is suppressed. .
円筒部６２の上方には、基端部から先端側に長手方向に沿って延びる矩形状の内筒スリット部６３が形成されている。内筒スリット部６３とストッパ９のストッパスリット部９４との短手方向の幅は同程度の大きさに形成されている。内筒スリット部６３の基端と円筒部６２の基端との間には、該内筒スリット部６３より幅狭な組立溝６４が設けられている。組立溝６４の基端側には、基端に向かうに従い溝の幅が漸次広くなる一対の傾斜部６４ａとなっている。
A rectangular inner cylinder slit portion 63 extending in the longitudinal direction from the proximal end portion to the distal end side is formed above the cylindrical portion 62. The widths in the short direction of the inner cylinder slit portion 63 and the stopper slit portion 94 of the stopper 9 are formed to be approximately the same. Between the base end of the inner cylinder slit part 63 and the base end of the cylindrical part 62, an assembly groove 64 narrower than the inner cylinder slit part 63 is provided. On the base end side of the assembly groove 64, there are a pair of inclined portions 64a in which the width of the groove gradually increases toward the base end.
円筒部６２内周面の下方には、先端から基端側に延びる凸状の揺動阻止部６５が設けられている。揺動阻止部６５は、内針基４の径方向の移動を阻止するものであり、本発明の移動阻止部を構成する。また、この揺動阻止部６５とストッパ９の凹部９２ｃとが嵌合することにより、内筒６の内部でストッパ９が相対的に回動することを防止できる。
Below the inner peripheral surface of the cylindrical portion 62, a convex swing preventing portion 65 extending from the distal end to the proximal end side is provided. The rocking | fluctuation prevention part 65 blocks | prevents the movement of the inner needle base 4 to the radial direction, and comprises the movement prevention part of this invention. Further, the stopper 9 can be prevented from rotating relative to the inside of the inner cylinder 6 by fitting the swing preventing portion 65 and the recess 92 c of the stopper 9.
円筒部６２の上部かつ先端には、内筒６を第１位置から第２位置へ移動させるための内筒操作部６６が設けられている。内筒操作部６６は、図４Ｃに示すように、軸線を含んで上下方向に延びる平面を挟んで設けられた一対の柱部６６ａ，６６ａと、両柱部６６ａを結ぶ架橋部６６ｂ（本発明の庇部に相当。）とによって、アーチ形状に形成されている。内筒操作部６６は、後述するスイッチ操作部７４が通過可能なように、一対の柱部６６ａ，６６ａが、スイッチ操作部７４の幅より離間して設けられている。内筒操作部６６は、本発明の移動部材操作部を構成する。
An inner cylinder operation part 66 for moving the inner cylinder 6 from the first position to the second position is provided at the top and the tip of the cylindrical part 62. As shown in FIG. 4C, the inner cylinder operation portion 66 includes a pair of column portions 66a and 66a provided across a plane extending in the vertical direction including the axis, and a bridging portion 66b connecting the both column portions 66a (the present invention). It is formed in an arch shape. The inner cylinder operation portion 66 is provided with a pair of column portions 66 a and 66 a that are separated from the width of the switch operation portion 74 so that a switch operation portion 74 described later can pass therethrough. The inner cylinder operation unit 66 constitutes the moving member operation unit of the present invention.
柱部６６ａの基端側は、筐体５を保持している手の親指又は人差し指で内筒６を筐体５の先端方向に押しやすいように、上方がやや先端側に傾斜した面となっている。
The base end side of the column portion 66a is a surface inclined slightly upward toward the distal end side so that the inner cylinder 6 can be easily pushed toward the distal end of the casing 5 with the thumb or index finger of the hand holding the casing 5. ing.
図５は、スイッチ７の詳細を示す。図５Ａは平面図、図５Ｂは正面図、図５Ｃは左側面図、図５Ｄは右側面図、図５Ｅは底面図、図５Ｆは図５ＡのＡ－Ａ断面図である。
FIG. 5 shows the details of the switch 7. 5A is a plan view, FIG. 5B is a front view, FIG. 5C is a left side view, FIG. 5D is a right side view, FIG. 5E is a bottom view, and FIG. 5F is a cross-sectional view along AA in FIG.
図５に示すように、スイッチ７は、長手方向に沿って延びる矩形状の上部板状部材７１と、該上部板状部材７１の下方で平行に延びる矩形状の下部板状部材７２と、上部板状部材７１の基端部と下部板状部材７２の基端部とを結合して基端方向に延びる結合部７３とを有する。
As shown in FIG. 5, the switch 7 includes a rectangular upper plate member 71 extending along the longitudinal direction, a rectangular lower plate member 72 extending in parallel below the upper plate member 71, and an upper portion. It has the coupling | bond part 73 which couple | bonds the base end part of the plate-shaped member 71, and the base end part of the lower plate-shaped member 72, and extends in a base end direction.
図５Ｃ及び図５Ｄに示すように、上部板状部材７１の短手方向の幅は、下部板状部材７２の短手方向の幅と同程度であり、結合部７３の短手方向の幅よりも大である。
As shown in FIGS. 5C and 5D, the width of the upper plate member 71 in the short direction is approximately the same as the width of the lower plate member 72 in the short direction, and is smaller than the width of the coupling portion 73 in the short direction. Is also great.
また、内筒６の内筒スリット部６３の短手方向の幅は、結合部７３の幅を超え上部板状部材７１の幅未満の大きさである。これにより、結合部７３は内筒スリット部６３に嵌入され摺動可能であるが、上部板状部材７１及び下部板状部材７２は無理に変形させない限り内筒スリット部６３を通過しない。
Further, the width in the short direction of the inner cylinder slit portion 63 of the inner cylinder 6 exceeds the width of the coupling portion 73 and is smaller than the width of the upper plate-like member 71. As a result, the coupling portion 73 is fitted into the inner cylinder slit portion 63 and can slide, but the upper plate member 71 and the lower plate member 72 do not pass through the inner cylinder slit portion 63 unless they are forcibly deformed.
上部板状部材７１は内筒６の外周面に沿うように湾曲し、下部板状部材７２は内針基４のフィルタ挿入部４２の外周面に沿うように湾曲し、結合部７３はストッパ９の外周面に沿うように湾曲している。
The upper plate member 71 is curved along the outer peripheral surface of the inner cylinder 6, the lower plate member 72 is curved along the outer peripheral surface of the filter insertion portion 42 of the inner needle base 4, and the coupling portion 73 is the stopper 9. It curves so that the outer peripheral surface of this may be followed.
上部板状部材７１の上部かつ先端には、スイッチ７を第３位置から第４位置へ移動させるためのスイッチ操作部７４が設けられている。スイッチ操作部７４の先端側は、筐体５を保持している手の親指又は人差し指で基端方向に押しやすいように、上方がやや基端側に傾斜した面となっている。
A switch operation unit 74 for moving the switch 7 from the third position to the fourth position is provided at the top and tip of the upper plate member 71. The front end side of the switch operation unit 74 is a surface slightly inclined upward toward the base end side so that the thumb or index finger of the hand holding the casing 5 can be easily pushed in the base end direction.
上部板状部材７１の両側面には、スイッチ操作部７４の基端側に隣接して一対の張出部７５，７５が設けられている。張出部７５，７５は、上部板状部材７１の短手方向に沿って夫々延出している。
A pair of overhanging portions 75 and 75 are provided on both side surfaces of the upper plate-like member 71 adjacent to the proximal end side of the switch operating portion 74. The overhang portions 75, 75 extend along the short direction of the upper plate-like member 71, respectively.
下部板状部材７２の先端部には、上下に貫通し、内針基４の突出部４５が嵌合される押圧収納部７６が形成されている。押圧収納部７６の先端側面は、スイッチ７が第４位置へ移動するときに内針基４の突出部４５と接触して該突出部４５を下方に押下し、内針基４に後述する揺動を生じさせる押圧部７６ａを構成する。なお、実施形態では、突出部４５に押下を可能にするための傾斜面４５ａが設けられているが、本発明はこれに限られず、押圧部７６ａに、押下を可能にする傾斜面を設けてもよい。
At the tip of the lower plate-like member 72, a press accommodating portion 76 that penetrates vertically and into which the protruding portion 45 of the inner needle base 4 is fitted is formed. When the switch 7 moves to the fourth position, the tip side surface of the press accommodating portion 76 comes into contact with the protruding portion 45 of the inner needle base 4 and presses the protruding portion 45 downward, and the inner needle base 4 is swung later. A pressing portion 76a that causes movement is configured. In the embodiment, the projecting portion 45 is provided with an inclined surface 45a for enabling pressing, but the present invention is not limited to this, and the pressing portion 76a is provided with an inclined surface for enabling pressing. Also good.
下部板状部材７２の底面のうち押圧収納部７６の周縁部は、内筒６の揺動阻止部６５と協働して揺動防止機構を構成する。すなわち、該周縁部と揺動阻止部６５とは、内筒６が第１位置から第２位置へ移動されるまで、内針基４のフィルタ挿入部４２を上下方向から挟み込んで、内針基４が下方向に揺動するのを阻止する。
Of the bottom surface of the lower plate-like member 72, the peripheral edge portion of the press housing portion 76 constitutes a rocking prevention mechanism in cooperation with the rocking prevention portion 65 of the inner cylinder 6. That is, the peripheral edge portion and the rocking prevention portion 65 sandwich the filter insertion portion 42 of the inner needle base 4 from above and below until the inner cylinder 6 is moved from the first position to the second position. 4 is prevented from swinging downward.
図６は外筒８の詳細を示す。図６Ａは平面図、図６Ｂは正面図、図６Ｃは左側面図、図６Ｄは右側面図、図６Ｅは図６ＡのＥ－Ｅ断面図、図６Ｆは図６ＢのＦ－Ｆ断面図である。
FIG. 6 shows the details of the outer cylinder 8. 6A is a plan view, FIG. 6B is a front view, FIG. 6C is a left side view, FIG. 6D is a right side view, FIG. 6E is a cross-sectional view taken along line EE in FIG. 6A, and FIG. is there.
図６に示すように、外筒８は、両側面に一対の滑止部８１ａが形成された中空円筒状の本体部８１と、該本体部８１の基端に設けられた円盤状の平板状部材である底部８２とを備える。
As shown in FIG. 6, the outer cylinder 8 includes a hollow cylindrical main body 81 in which a pair of anti-slip portions 81 a are formed on both side surfaces, and a disk-shaped flat plate provided at the base end of the main body 81. And a bottom portion 82 which is a member.
外筒８の上部は、先端から中央部までにわたってスリット状に開放している外筒スリット部８３が形成されている。
The outer cylinder 8 is formed with an outer cylinder slit portion 83 that is open in a slit shape from the tip to the center.
外筒スリット部８３の先端側は、内筒６の内筒操作部６６の横幅と同等の幅を有し、内筒操作部６６を第１位置において収納する内筒収納部８３ａとなっている。
The distal end side of the outer cylinder slit portion 83 has a width equivalent to the lateral width of the inner cylinder operation portion 66 of the inner cylinder 6 and serves as an inner cylinder storage portion 83a for storing the inner cylinder operation portion 66 at the first position. .
外筒スリット部８３は、内筒収納部８３ａの基端側に隣接して一対の戻り防止部８３ｂが設けられている。一対の戻り防止部８３ｂは、外筒スリット部８３の対向する縁部から夫々接近する方向に凸状に張り出すことで形成され、スイッチ７が第３位置から第４位置に移動したときに、スイッチ７の張出部７５，７５と接してそれ以上の移動を阻止する。
The outer cylinder slit part 83 is provided with a pair of return prevention parts 83b adjacent to the proximal end side of the inner cylinder storage part 83a. The pair of return preventing portions 83b are formed by projecting in a direction approaching from the opposing edges of the outer cylinder slit portion 83, respectively, and when the switch 7 moves from the third position to the fourth position, Further contact with the projecting portions 75 and 75 of the switch 7 prevents further movement.
外筒スリット部８３は、戻り防止部８３ｂの基端側に隣接して、内筒収納部８３ａより幅狭でスイッチ７を収納するスイッチ収納部８３ｃが形成されている。
The outer cylinder slit part 83 is adjacent to the proximal end side of the return prevention part 83b, and is formed with a switch housing part 83c that is narrower than the inner cylinder housing part 83a and houses the switch 7.
底部８２は、中央が矩形状に開口した円盤状であり、ストッパ９の爪部９３ａを係止する。底部８２の開口端縁において、先端側面は、爪部９３ａが乗り越え易いように傾斜面となっており、他方、基端側面は、乗り越えた爪部９３ａが基に戻るのを阻止できるよう
に、外筒８の軸線に垂直な面となっている。 Thebottom portion 82 has a disk shape whose center is opened in a rectangular shape, and locks the claw portion 93 a of the stopper 9. At the opening edge of the bottom portion 82, the tip side surface is an inclined surface so that the claw portion 93a can easily get over, while the base side surface can prevent the claw portion 93a that got over from returning to the base. The surface is perpendicular to the axis of the outer cylinder 8.
に、外筒８の軸線に垂直な面となっている。 The
留置針組立体１の組立は次のようにして行われる。
The assembly of the indwelling needle assembly 1 is performed as follows.
すなわち、図１～図６から理解されるように、まず、内針基４のフィルタ挿入部４２に、上述のフィルタ（散気栓）４６を挿入する。次に、圧縮スプリングＳを圧縮しながら、その一端が、内針基４の段差部４３を押圧するようにして、内針基４の内針固定部４１に装着する。
That is, as can be understood from FIGS. 1 to 6, first, the above-described filter (aeration plug) 46 is inserted into the filter insertion portion 42 of the inner needle base 4. Next, while compressing the compression spring S, one end of the compression spring S is attached to the inner needle fixing portion 41 of the inner needle base 4 so as to press the stepped portion 43 of the inner needle base 4.
次に、内針基４に対し、ストッパ９を上方から装着する。すなわち、ストッパ９先端の天板部９２に内針固定部４１が嵌合して天板部９２が圧縮スプリングＳの他端を押圧し、かつ、内針基４の被係止部４４をストッパ９の係止収納部９５に嵌合するように、内針基４に対してストッパ９を配置する。このとき、係止収納部９５の係止部９５ａは、圧縮スプリングＳの付勢力に抗して、内針基４の被係止部４４を係止することになる。
Next, a stopper 9 is attached to the inner needle base 4 from above. That is, the inner needle fixing portion 41 is fitted to the top plate portion 92 at the tip of the stopper 9, the top plate portion 92 presses the other end of the compression spring S, and the locked portion 44 of the inner needle base 4 is stopped by the stopper. The stopper 9 is disposed with respect to the inner needle base 4 so as to be fitted into the latching storage portion 95 of 9. At this time, the locking portion 95 a of the locking storage portion 95 locks the locked portion 44 of the inner needle base 4 against the urging force of the compression spring S.
これにより、内針基４の先端側は、天板部９２によって内針基４の基端側が下方に揺動し得るように支持される。
Thereby, the distal end side of the inner needle base 4 is supported by the top plate portion 92 so that the proximal end side of the inner needle base 4 can swing downward.
次に、ストッパ９に対し、スイッチ７を上から装着する。すなわち、内針基４の突出部４５にスイッチ７の押圧収納部７６を嵌合させ、かつ、ストッパ９のストッパスリット部９４に沿ってスイッチ７の下部板状部材７２を嵌入させる。
Next, the switch 7 is mounted on the stopper 9 from above. That is, the press accommodating portion 76 of the switch 7 is fitted into the protruding portion 45 of the inner needle base 4, and the lower plate member 72 of the switch 7 is fitted along the stopper slit portion 94 of the stopper 9.
これにより、スイッチ７は、ストッパ９に対して第３位置に取り付けられたことになる。
Thus, the switch 7 is attached to the third position with respect to the stopper 9.
次に、内筒６の基端側からストッパ９の先端部を挿入し、内筒６の基端がストッパ９の底板部９３に接するまで、内筒６を、内針基４、ストッパ９及びスイッチ７に対してスライドさせる。
Next, the distal end portion of the stopper 9 is inserted from the proximal end side of the inner tube 6, and the inner tube 6 is moved to the inner needle base 4, the stopper 9, and the stopper until the proximal end of the inner tube 6 contacts the bottom plate portion 93 of the stopper 9. Slide against switch 7.
すなわち、内筒６の組立溝６４は傾斜部６４ａを備えるので、スイッチ７の結合部７３とストッパ９の凸部９６とが、順次、組立溝６４を乗り越えて、内筒スリット部６３に挿入される。さらに、ストッパ９を前進させていくと、スイッチ７の上部板状部材７１と下部板状部材７２との間に挟み込まれるように、内筒の円筒部６２が挿入される。内筒６の先端部までストッパ９を前進させていくと、内針基４の内針固定部４１が外針基取付部６１に挿入され、かつ、内筒６の揺動阻止部６５に、ストッパ９の凹部９２ｃが嵌合されると共に、内針基４のフィルタ挿入部４２の下部を支持する。
That is, since the assembly groove 64 of the inner cylinder 6 includes the inclined portion 64a, the coupling portion 73 of the switch 7 and the convex portion 96 of the stopper 9 sequentially pass over the assembly groove 64 and are inserted into the inner cylinder slit portion 63. The Further, when the stopper 9 is advanced, the cylindrical portion 62 of the inner cylinder is inserted so as to be sandwiched between the upper plate member 71 and the lower plate member 72 of the switch 7. When the stopper 9 is advanced to the tip of the inner cylinder 6, the inner needle fixing portion 41 of the inner needle base 4 is inserted into the outer needle base mounting portion 61, and the swing prevention portion 65 of the inner cylinder 6 is The concave portion 92 c of the stopper 9 is fitted, and the lower portion of the filter insertion portion 42 of the inner needle base 4 is supported.
さらに内筒６の先端に接するまでストッパ９を前進させると、スイッチ７のスイッチ操作部７４が、内筒６の内筒操作部６６のアーチ状の下部に入り込み収納される。内筒６の内側の長さとストッパ９の外側の長さとは同程度であるため、内筒６の先端に接するまでストッパ９を前進させたときに、内筒６の基端がストッパ９の底板部９３に接する。
Further, when the stopper 9 is advanced until it comes into contact with the tip of the inner cylinder 6, the switch operating portion 74 of the switch 7 enters and is stored in the arched lower portion of the inner cylinder operating portion 66 of the inner cylinder 6. Since the inner length of the inner cylinder 6 and the outer length of the stopper 9 are approximately the same, when the stopper 9 is advanced until it contacts the tip of the inner cylinder 6, the base end of the inner cylinder 6 is the bottom plate of the stopper 9. It contacts the part 93.
これにより内筒６は、ストッパ９に対して第１の位置に取り付けられたことになるとともに、内筒６の第１位置における内筒操作部６６の位置と、スイッチ７の第３位置におけるスイッチ操作部７４の位置とが長手方向において、概略一致することになる。
As a result, the inner cylinder 6 is attached to the stopper 9 at the first position, and the position of the inner cylinder operating portion 66 at the first position of the inner cylinder 6 and the switch at the third position of the switch 7 are set. The position of the operation unit 74 is approximately the same in the longitudinal direction.
このとき、内筒６の揺動阻止部６５は、スイッチ７の第２板状部材の底面及びストッパ９の内周面とによって、内針基４のフィルタ挿入部４２を上下から挟み込むことで支持し、フィルタ挿入部４２が天板部９２を中心として下方向に揺動するのを阻止した状態となる。
At this time, the swing preventing portion 65 of the inner cylinder 6 is supported by sandwiching the filter insertion portion 42 of the inner needle base 4 from above and below by the bottom surface of the second plate-like member of the switch 7 and the inner peripheral surface of the stopper 9. Thus, the filter insertion portion 42 is prevented from swinging downward about the top plate portion 92.
また、この揺動阻止部６５とストッパ９の凹部９２ｃとにより、内筒６の内部でストッパ９が相対的に回動することを防止される。
Further, the swing prevention portion 65 and the concave portion 92 c of the stopper 9 prevent the stopper 9 from rotating relative to the inside of the inner cylinder 6.
次に、外筒８の先端側から内筒６の基端部を挿入し、ストッパ９の底板部９３が外筒の底部８２に接するまで、外筒８を、内針基４、ストッパ９、スイッチ７及び内筒６に対してスライドさせる。このとき、スイッチ７の上部板状部材７１と内筒６の内筒操作部６６とが、外筒８の外筒スリット部８３によって案内される。
Next, the base end portion of the inner cylinder 6 is inserted from the distal end side of the outer cylinder 8, and the outer cylinder 8 is moved to the inner needle base 4, the stopper 9, until the bottom plate portion 93 of the stopper 9 contacts the bottom portion 82 of the outer cylinder. The switch 7 and the inner cylinder 6 are slid. At this time, the upper plate member 71 of the switch 7 and the inner cylinder operating portion 66 of the inner cylinder 6 are guided by the outer cylinder slit portion 83 of the outer cylinder 8.
すなわち、スイッチ７を外筒スリット部８３に沿うように挿入していき、スイッチ７の上部板状部材７１をスイッチ収納部８３ｃに収納するとともに、内筒操作部６６を内筒収納部８３ａに収納する。さらに、内筒６を外筒８の基端に接するまで挿入し、更に基端方向に押し込むと、ストッパ９の爪部９３ａが外筒８の底部８２に設けられた開口を乗り越えて係止される。これにより、外筒８の装着が完了し、内筒６は外筒８に対して第１位置に取り付けられたことになる。
That is, the switch 7 is inserted along the outer cylinder slit portion 83, the upper plate member 71 of the switch 7 is stored in the switch storage portion 83c, and the inner cylinder operation portion 66 is stored in the inner cylinder storage portion 83a. To do. Further, when the inner cylinder 6 is inserted until it comes into contact with the base end of the outer cylinder 8 and is further pushed in the base end direction, the claw portion 93a of the stopper 9 gets over the opening provided in the bottom portion 82 of the outer cylinder 8 and is locked. The Thereby, the mounting of the outer cylinder 8 is completed, and the inner cylinder 6 is attached to the first position with respect to the outer cylinder 8.
次に、内針３の基端部に接着剤を塗布し、該基端部を内針基４の内針固定部４１に挿入して接着する。
Next, an adhesive is applied to the proximal end portion of the inner needle 3, and the proximal end portion is inserted into the inner needle fixing portion 41 of the inner needle base 4 and adhered.
次に、内筒６の外針基取付部６１を留置部２の外針基２２に嵌合することにより、留置部２を内筒６に取り付ける。さらに、外筒８の先端部をプロテクタ１０の基端部に挿入してプロテクタ１０を外筒８に取り付ける。これにより、留置針組立体１の組立てが完了する。
Next, the indwelling part 2 is attached to the inner cylinder 6 by fitting the outer needle base attaching part 61 of the inner cylinder 6 to the outer needle base 22 of the indwelling part 2. Further, the protector 10 is attached to the outer cylinder 8 by inserting the distal end of the outer cylinder 8 into the base end of the protector 10. Thereby, the assembly of the indwelling needle assembly 1 is completed.
留置針組立体１の使用に際しては、まず、留置針組立体１からプロテクタ１０を取り外し、外針２１を露出させる。
When using the indwelling needle assembly 1, first, the protector 10 is removed from the indwelling needle assembly 1 to expose the outer needle 21.
次に、筐体５を保持し、内針３及び外針２１を、血管の対象部位に穿刺する。このとき、内針３及び外針２１が血管に穿刺されたことは、内針基４のフィルタ挿入部４２において、血液のフラッシュバックが生じることにより確認することができる。
Next, the housing 5 is held, and the inner needle 3 and the outer needle 21 are punctured into the target site of the blood vessel. At this time, the puncture of the inner needle 3 and the outer needle 21 into the blood vessel can be confirmed by the occurrence of flashback of blood at the filter insertion portion 42 of the inner needle base 4.
なお、内針基４の基端部は、フィルタ挿入部４２に挿入されたフィルタ（散気栓）４６により閉塞されているので、内針基４の基端部から血液が流出することはなく、かつ先端側への血液の逆流が制限される。
る。 Since the proximal end portion of theinner needle base 4 is blocked by a filter (aeration plug) 46 inserted into the filter insertion portion 42, blood does not flow out from the proximal end portion of the inner needle base 4. And the backflow of blood to the tip side is limited.
The
る。 Since the proximal end portion of the
The
以上のように、内筒６が第１位置に位置するとき、内針基４は、図７Ａに示すように、内針固定部４１の先端側がストッパ９の天板部９２によって揺動可能に支持され、ストッパ９の係止部９５ａにより、圧縮スプリングＳの付勢力に抗して、内針基４の被係止部４４を介して支持されている。
As described above, when the inner cylinder 6 is located at the first position, the inner needle base 4 is configured such that the distal end side of the inner needle fixing portion 41 can be swung by the top plate portion 92 of the stopper 9 as shown in FIG. 7A. It is supported by the locking portion 95a of the stopper 9 via the locked portion 44 of the inner needle base 4 against the urging force of the compression spring S.
また、内筒６の揺動阻止部６５がフィルタ挿入部４２の下部を支持していることにより、フィルタ挿入部４２の下方への揺動が阻止されている。
Further, since the swing preventing portion 65 of the inner cylinder 6 supports the lower portion of the filter insertion portion 42, the downward swing of the filter insertion portion 42 is prevented.
次に、内筒操作部６６を、筐体５を保持している手の親指又は人差し指で押すことにより、外針２１のみを血管内へさらに送出する。これにより、内筒６が第１位置から先端方向へ移動されて第２位置に至ると、図７Ｂに示すように、揺動阻止部６５がフィルタ挿入部４２の下部から外れて、フィルタ挿入部４２よりも径の大きな円筒部６２の位置に移動する。
Next, only the outer needle 21 is further delivered into the blood vessel by pushing the inner cylinder operation unit 66 with the thumb or index finger of the hand holding the housing 5. As a result, when the inner cylinder 6 is moved from the first position toward the distal end and reaches the second position, as shown in FIG. 7B, the rocking prevention part 65 comes off from the lower part of the filter insertion part 42, and the filter insertion part It moves to the position of the cylindrical part 62 having a diameter larger than 42.
これにより、揺動阻止部６５による内針基４の揺動の阻止が解除されることになる。
Thereby, the prevention of the swinging of the inner needle base 4 by the swinging prevention part 65 is released.
次に、スイッチ７のスイッチ操作部７４を、筐体５を保持している手の親指又は人差し指で引く。これにより、スイッチ７が第３位置から基端方向へ移動されて第４位置に至ると、図７Ｃに示すように、スイッチ７の押圧部７６ａが内針基４の突出部４５に接触し、突出部４５を押下する。これにより、内針基４がストッパ９の天板部９２を中心として揺動し、内針基４のフィルタ挿入部４２が下方に変位する。これに伴い、内針基４の被係止部４４は、下方に変位してストッパ９の係止部９５ａによって支持される位置から外れ、係止部９５ａによる被係止部４４の支持が解除される。
Next, the switch operating portion 74 of the switch 7 is pulled with the thumb or index finger of the hand holding the housing 5. Thereby, when the switch 7 is moved from the third position toward the proximal end and reaches the fourth position, the pressing portion 76a of the switch 7 comes into contact with the protruding portion 45 of the inner needle base 4, as shown in FIG. The protrusion 45 is pressed down. As a result, the inner needle base 4 swings around the top plate portion 92 of the stopper 9 and the filter insertion portion 42 of the inner needle base 4 is displaced downward. Along with this, the locked portion 44 of the inner needle base 4 is displaced downward to be removed from the position supported by the locking portion 95a of the stopper 9, and the support of the locked portion 44 by the locking portion 95a is released. Is done.
これにより、図７Ｄに示すように、圧縮スプリングＳが伸張し、内針基４をストッパ９の底板部９３に接するまで移動させる。これに伴い、内針基４に固定された内針３は外針２１から引き抜かれ、筐体５内に収容される。
Thereby, as shown in FIG. 7D, the compression spring S is extended, and the inner needle base 4 is moved until it contacts the bottom plate portion 93 of the stopper 9. Accordingly, the inner needle 3 fixed to the inner needle base 4 is pulled out from the outer needle 21 and accommodated in the housing 5.
なお、スイッチ７が第４位置に到達すると、外筒８の戻り防止部８３ｂがスイッチ７の張出部７５に接触するので、スイッチ７のそれ以上の移動は阻止される。
When the switch 7 reaches the fourth position, the return preventing portion 83b of the outer cylinder 8 comes into contact with the overhanging portion 75 of the switch 7, so that further movement of the switch 7 is prevented.
この後、内筒６の外針基取付部６１を外針基２２から取り外すことにより、外針基２２を伴う外針２１を、対象部位に留置することができる。留置された外針基２２に輸液ライン等を接続することにより、輸液等の処置が施される。
Thereafter, by removing the outer needle base attaching portion 61 of the inner cylinder 6 from the outer needle base 22, the outer needle 21 with the outer needle base 22 can be placed at the target site. By connecting an infusion line or the like to the indwelling outer needle base 22, treatment such as infusion is performed.
以上のように、本実施形態によれば、筐体５を保持して対象部位に内針３及び外針２１を穿刺した後、筐体５を保持している手の親指又は人差し指で内筒６の内筒操作部６６に指を掛け先端方向に押すことで、外針２１のみを血管内へさらに送出させると共に、内針基４の揺動の阻止を解除することができる。そして、スイッチ７のスイッチ操作部７４に指を掛け基端方向に引くだけで内針基４を揺動させることで圧縮スプリングＳ（付勢部材）に抗した内針基４の支持が解除し、圧縮スプリングＳにより内針基４を基端方向へ移動させ、内針３を筐体５内へ収容することができる。
As described above, according to the present embodiment, after holding the housing 5 and puncturing the inner needle 3 and the outer needle 21 in the target site, the inner cylinder with the thumb or index finger of the hand holding the housing 5 By placing a finger on the inner cylinder operating portion 66 of 6 and pushing in the distal direction, only the outer needle 21 can be further delivered into the blood vessel and the prevention of the swinging of the inner needle base 4 can be released. Then, the support of the inner needle base 4 against the compression spring S (biasing member) is released by swinging the inner needle base 4 simply by putting a finger on the switch operating portion 74 of the switch 7 and pulling it in the proximal direction. The inner needle base 4 can be moved in the proximal direction by the compression spring S, and the inner needle 3 can be accommodated in the housing 5.
このとき、内針基４の揺動の阻止を解除することは、内筒操作部６６を先端方向に押す操作によって行い、内針基４を揺動させてストッパ９による支持を解除することは、スイッチ操作部７４を基端方向に引く操作によって行うよう、操作が分けられているため、誤って内針３の後退が発動され、予期せぬタイミングで内針が収容されることを防止できる。
At this time, the prevention of the swinging of the inner needle base 4 is performed by an operation of pushing the inner cylinder operation portion 66 in the distal direction, and the support by the stopper 9 is released by swinging the inner needle base 4. Since the operation is divided so as to be performed by pulling the switch operation portion 74 in the proximal direction, it is possible to prevent the inner needle 3 from being retracted accidentally and the inner needle from being received at an unexpected timing. .
また、上述した内筒操作部６６を先端方向に押す操作、及び、スイッチ操作部７４を基端方向に引く操作は、いずれも外針２１の軸線方向に沿っているため、手技の際に外針の針先が径方向にぶれることを防止できる。
In addition, since the above-described operation of pushing the inner cylinder operation unit 66 in the distal direction and the operation of pulling the switch operation unit 74 in the proximal direction are both along the axial direction of the outer needle 21, The needle tip of the needle can be prevented from shaking in the radial direction.
また、本実施形態では、内筒６の第１位置における内筒操作部６６の位置と、スイッチ７の第３位置におけるスイッチ操作部７４の位置とが長手方向において、概略一致していることから、指を伸ばす・曲げるという動作をするだけで、内筒操作部６６を先端方向に押す操作及びスイッチ操作部７４を基端方向に引く操作を行うことができる。したがって、手技の際に、複数の手指を用いたり、持ち直したりする動作が不要となるので、容易に作動させることができる。
Further, in the present embodiment, the position of the inner cylinder operation portion 66 at the first position of the inner cylinder 6 and the position of the switch operation portion 74 at the third position of the switch 7 are substantially the same in the longitudinal direction. The operation of pushing the inner cylinder operation part 66 in the distal direction and the operation of pulling the switch operation part 74 in the proximal direction can be performed only by extending and bending the finger. Therefore, the operation of using a plurality of fingers or picking them up is not necessary during the procedure, and can be easily operated.
また、スイッチ７の結合部７３とストッパ９の凸部９６とが、内筒６の内筒スリット部６３の対向する両縁によって挟まれ、さらに、スイッチ７の上部板状部材７１が外筒８の戻り防止部８３ｂ，８３ｂに挟まれるため、スイッチ７を介して、ストッパ９、内筒６及び外筒８が相対的に回動することが防止されているので、手技を安定して行うことができ
る。 Further, thecoupling portion 73 of the switch 7 and the convex portion 96 of the stopper 9 are sandwiched between opposing edges of the inner cylinder slit portion 63 of the inner cylinder 6, and the upper plate member 71 of the switch 7 is Since the stopper 9, the inner cylinder 6 and the outer cylinder 8 are prevented from rotating relative to each other via the switch 7, the procedure is stably performed. Can do.
る。 Further, the
また、スイッチ７は、図５Ｂに示すように、上部板状部材７１と下部板状部材７２とが結合部７３によって結合された略音叉形状であるため、スイッチ操作部７４を基端方向に引く操作をした際に、上部板状部材７１及び下部板状部材７２の長手方向に沿って圧縮及び引張が働く。したがって、捻じれや撓みが生じないので、幅を狭く設計することができる。また、上記略音叉形状を有するため、内針基４の突出部４５にスイッチ７の押圧収納部７６を嵌合させた状態で、下部板状部材７２を内筒６の円筒部６２の内部に入り込むように組み立てることができる。したがって、本実施形態によれば、簡易な構成で留置針組立体１の小型化を図ることができる。
Further, as shown in FIG. 5B, the switch 7 has a substantially tuning fork shape in which an upper plate member 71 and a lower plate member 72 are coupled by a coupling portion 73, and therefore the switch operation unit 74 is pulled in the proximal direction. When operated, compression and tension work along the longitudinal direction of the upper plate member 71 and the lower plate member 72. Therefore, since the twist and the bending do not occur, the width can be designed to be narrow. Further, since it has the substantially tuning fork shape, the lower plate member 72 is placed inside the cylindrical portion 62 of the inner cylinder 6 in a state where the pressing housing portion 76 of the switch 7 is fitted to the protruding portion 45 of the inner needle base 4. Can be assembled to enter. Therefore, according to this embodiment, the indwelling needle assembly 1 can be downsized with a simple configuration.
なお、本発明は上述した実施形態に限定されない。
Note that the present invention is not limited to the embodiment described above.
例えば、本実施形態では、内筒操作部６６は、一対の柱部６６ａ，６６ａと、両柱部６６ａを結ぶ架橋部６６ｂとによって、アーチ状に形成されているが、架橋部６６ｂを省略して一対の柱部６６ａ，６６ａとしてもよく、架橋部６６ｂ及び柱部６６ａを省略して１個の柱部６６ａとしてもよく、柱部６６ａを省略してＬ字状の内筒操作部６６としてもよい。
For example, in the present embodiment, the inner cylinder operation portion 66 is formed in an arch shape by a pair of column portions 66a and 66a and a bridge portion 66b connecting both the column portions 66a, but the bridge portion 66b is omitted. A pair of pillar portions 66a and 66a may be used, the bridge portion 66b and the pillar portion 66a may be omitted to form a single pillar portion 66a, and the pillar portion 66a may be omitted as an L-shaped inner cylinder operation portion 66. Also good.
また、例えば、本実施形態では、内筒操作部６６のアーチ状にするとともに、その内側にスイッチ操作部７４を配置することで、内筒６の第１位置における内筒操作部６６の位置と、スイッチ７の第３位置におけるスイッチ操作部７４の位置とを長手方向において一致させたが、第３位置におけるスイッチ操作部７４を、内筒６の第１位置における内筒操作部６６の位置の基端側に隣接させて配置してもよい。
Further, for example, in the present embodiment, the inner cylinder operation unit 66 is formed in an arch shape, and the switch operation unit 74 is disposed on the inner side thereof, so that the position of the inner cylinder operation unit 66 in the first position of the inner cylinder 6 The position of the switch operation unit 74 at the third position of the switch 7 is matched in the longitudinal direction, but the switch operation unit 74 at the third position is set to the position of the inner cylinder operation unit 66 at the first position of the inner cylinder 6. You may arrange | position adjacent to a base end side.
また、図８に示すように、内筒６が第１位置から第２位置へ移動された後、内筒６が第１位置の方へ戻るのを防止する戻り防止機構６７を内筒６の基端部に設けてもよい。
Further, as shown in FIG. 8, after the inner cylinder 6 is moved from the first position to the second position, a return prevention mechanism 67 that prevents the inner cylinder 6 from returning toward the first position is provided on the inner cylinder 6. You may provide in a base end part.
戻り防止機構６７は、内筒スリット部６３からの切れ込みにより形成され、内筒スリット部６３の長手方向に延びた一対の片持ち梁状の部分の自由端において、内筒スリット部６３内に突出した部分として構成される。これにより戻り防止機構６７は、内筒６が第１位置から第２位置へ移動したときに、ストッパ９の凸部９６によって弾性的に押圧され、復帰することができるようになっている。
The return prevention mechanism 67 is formed by cutting from the inner cylinder slit portion 63 and protrudes into the inner cylinder slit portion 63 at the free ends of a pair of cantilevered portions extending in the longitudinal direction of the inner cylinder slit portion 63. Configured as a part. Thereby, the return prevention mechanism 67 is elastically pressed by the convex part 96 of the stopper 9 and can be returned when the inner cylinder 6 moves from the first position to the second position.
戻り防止機構６７の内筒６先端側は、ストッパ９の凸部９６が乗り越え易いように傾斜面となっている。また、戻り防止機構６７の中央部の対向する側縁は、乗り越えた凸部９６が嵌まり込んで基に戻るのを阻止できるように、凸部９６に対応したコの字状に切り欠かれている。
The tip end side of the inner cylinder 6 of the return prevention mechanism 67 is inclined so that the convex part 96 of the stopper 9 can easily get over. Further, the opposite side edges of the central portion of the return prevention mechanism 67 are notched into a U-shape corresponding to the convex portion 96 so that the convex portion 96 that has been overcome can be prevented from being fitted and returned to the base. ing.
これにより、内筒６が第１位置の方へ戻って穿刺部位から外針２１が外れたりするのを防止することができる。
Thereby, it is possible to prevent the inner cylinder 6 from returning to the first position and the outer needle 21 from coming off from the puncture site.
１…留置針組立体、２１…外針、２２…外針基、３…内針、４…内針基、４４…被係止部、４５…突出部（被押圧部）、４５ａ…傾斜面、５…筐体、６…内筒（移動部材）、６５…揺動阻止部（移動阻止部）、６６…内筒操作部（移動部材操作部）、６６ａ…柱部、６６ｂ…架橋部（庇部）、７…スイッチ、７４…スイッチ操作部、７６ａ…押圧部、９２ａ…円形貫通孔（支持部）、９５ａ…係止部、Ｓ…圧縮スプリング（付勢部材）。
DESCRIPTION OFSYMBOLS 1 ... Indwelling needle assembly, 21 ... Outer needle, 22 ... Outer needle base, 3 ... Inner needle, 4 ... Inner needle base, 44 ... Locked part, 45 ... Projection part (pressed part), 45a ... Inclined surface DESCRIPTION OF SYMBOLS 5 ... Case, 6 ... Inner cylinder (moving member), 65 ... Swing prevention part (movement prevention part), 66 ... Inner cylinder operation part (moving member operation part), 66a ... Column part, 66b ... Bridge part ( 7) a switch, 74 a switch operating portion, 76a a pressing portion, 92a a circular through hole (supporting portion), 95a a locking portion, S a compression spring (biasing member).
DESCRIPTION OF
Claims (7)
- 管状の外針と、該外針の基端部が固定される外針基と、前記外針及び外針基の内部に挿通可能な内針と、該内針の基端部が固定される内針基と、前記内針基を軸方向及び径方向に移動可能に収納する筒状の筐体と、
先端部において前記外針基を取外し自在に保持し、前記筐体に対して所定の第１位置から前記外針の針先方向の第２位置まで移動可能な移動部材と、
前記内針基を前記筐体の基端方向へ付勢する付勢部材と、
前記筐体に対して所定の第３位置から前記外針の針先と反対方向の第４位置まで移動可能なスイッチとを備え、
前記移動部材は、前記第１位置にあるときに前記筐体内での前記内針基の径方向の移動を阻止する移動阻止部を有し、
前記内針基は、前記移動部材が前記第１位置にあるときは、前記付勢部材による付勢力に抗して前記筐体に係止されると共に、前記移動阻止部によって径方向への移動が阻止され、前記移動部材が前記第２位置に移動されたときは、前記移動阻止部による径方向への移動阻止が解除され、
前記スイッチは、前記第４位置にあるときに前記内針基を前記筐体内で径方向に押圧して径方向に移動させる押圧部を有し、
前記内針基は、前記押圧部により前記筐体内で径方向に押圧されて径方向に移動されることにより前記筐体との係止が解除され、前記付勢部材の付勢力により前記筐体の基端方向に移動され、前記内針の先端部が前記筐体内に収容されることを特徴とする留置針組立体。 A tubular outer needle, an outer needle base to which a proximal end portion of the outer needle is fixed, an inner needle that can be inserted into the outer needle and the outer needle base, and a proximal end portion of the inner needle are fixed An inner needle base, and a cylindrical housing that houses the inner needle base so as to be movable in the axial direction and the radial direction;
A movable member that detachably holds the outer needle base at the distal end portion and is movable from a predetermined first position to a second position in the needle tip direction of the outer needle with respect to the housing;
A biasing member that biases the inner needle base toward the proximal end of the housing;
A switch that is movable with respect to the housing from a predetermined third position to a fourth position in a direction opposite to the needle tip of the outer needle,
The moving member has a movement blocking portion for blocking the movement of the inner needle base in the radial direction in the housing when in the first position,
When the moving member is in the first position, the inner needle base is locked to the housing against the urging force of the urging member and is moved in the radial direction by the movement preventing portion. Is blocked and when the moving member is moved to the second position, the movement blocking in the radial direction by the movement blocking portion is released,
The switch has a pressing portion that moves the inner needle base in the radial direction by moving the inner needle base in the radial direction when in the fourth position;
The inner needle base is released in the radial direction in the casing by the pressing portion and is moved in the radial direction so that the locking with the casing is released, and the casing is moved by the biasing force of the biasing member. The indwelling needle assembly is characterized in that the distal end portion of the inner needle is accommodated in the housing. - 請求項１記載の留置針組立体において、
前記内針基の外周面には、前記筐体に係止される被係止部と、前記被係止部より基端側に前記スイッチの押圧部で押圧される被押圧部とが夫々形成され、
前記筐体の内周面には、前記被係止部を係止する係止部と、前記係止部より先端側に前記内針基を支持する支持部とが夫々形成され、
前記付勢部材は、前記筐体の支持部と前記内針基の被係止部との間に挟持され、
前記スイッチの押圧部は前記筐体内に挿入されて前記内針基の被係止部と前記内針基の被押圧部との間に配置され、
前記内針基の被押圧部と前記スイッチの押圧部との互いに対向する面の少なくとも一方には、前記内針基を前記筐体内で径方向に押圧して径方向に移動させる傾斜面が形成され、
前記移動部材は、前記移動阻止部が前記内針基を挟んで前記押圧部の反対側に配置されていることを特徴とする留置針組立体。 The indwelling needle assembly of claim 1.
On the outer peripheral surface of the inner needle base, a locked portion that is locked to the housing and a pressed portion that is pressed by the pressing portion of the switch on the proximal side from the locked portion are formed. And
A locking portion that locks the locked portion and a support portion that supports the inner needle base on the distal end side of the locking portion are formed on the inner peripheral surface of the housing,
The biasing member is sandwiched between a support portion of the housing and a locked portion of the inner needle base,
The pressing portion of the switch is inserted into the housing and disposed between the locked portion of the inner needle base and the pressed portion of the inner needle base,
At least one of the mutually opposed surfaces of the pressed portion of the inner needle base and the pressing portion of the switch is formed with an inclined surface that moves the inner needle base in the radial direction by moving the inner needle base in the radial direction. And
The indwelling needle assembly according to claim 1, wherein the moving member has the movement preventing portion disposed on the opposite side of the pressing portion with the inner needle base interposed therebetween. - 請求項１または２に記載の留置針組立体において、
前記移動部材は、該移動部材を前記第１位置から前記第２位置まで移動させる際に指掛け可能な移動部材操作部を有し、
前記スイッチは、該スイッチを前記第３位置から前記第４位置まで移動させる際に指掛け可能なスイッチ操作部を有し、
前記第１位置における移動部材操作部の基端側に隣接して、前記第３位置における前記スイッチ操作部が配置されることを特徴とする留置針組立体。 The indwelling needle assembly according to claim 1 or 2,
The moving member has a moving member operation section that can be hooked when moving the moving member from the first position to the second position;
The switch has a switch operation unit that can be hooked when moving the switch from the third position to the fourth position;
The indwelling needle assembly, wherein the switch operating portion in the third position is disposed adjacent to a proximal end side of the moving member operating portion in the first position. - 請求項１または２に記載の留置針組立体において、
前記スイッチは、該スイッチを前記第３位置から前記第４位置まで移動させる際に指掛け可能なスイッチ操作部を有し、
前記移動部材は、該移動部材を前記第１位置から前記第２位置まで移動させる際に指掛け可能な移動部材操作部を有し、
第３位置における前記スイッチ操作部は、第１位置における前記移動部材操作部と第２位置における前記移動部材操作部との間に配置されることを特徴とする留置針組立体。 The indwelling needle assembly according to claim 1 or 2,
The switch has a switch operation unit that can be hooked when moving the switch from the third position to the fourth position;
The moving member has a moving member operation section that can be hooked when moving the moving member from the first position to the second position;
The indwelling needle assembly, wherein the switch operation unit in the third position is disposed between the moving member operation unit in the first position and the moving member operation unit in the second position. - 請求項４に記載の留置針組立体において、
前記移動部材操作部は、前記移動部材から前記径方向に延びる柱部と、該柱部から前記軸方向及び前記径方向に交わる方向に延設された庇部とを有し、前記第１位置において前記スイッチ操作部を該庇部の収納可能であることを特徴とする留置針組立体。 The indwelling needle assembly according to claim 4,
The moving member operation portion includes a column portion extending in the radial direction from the moving member, and a flange portion extending from the column portion in a direction crossing the axial direction and the radial direction, and the first position In the indwelling needle assembly, the switch operation part can be stored in the collar part. - 請求項１または２に記載の留置針組立体において、
前記移動部材は、前記筐体及び前記スイッチの少なくとも一方によって径方向の回転が抑制される留置針組立体。 The indwelling needle assembly according to claim 1 or 2,
The moving member is an indwelling needle assembly in which radial rotation is suppressed by at least one of the housing and the switch. - 請求項１または２に記載の留置針組立体において、
前記移動部材は、片持ち梁状の形状を備えた切れ込みを形成することで、前記第２位置へ移動した後、再度第１位置に戻る事を抑制される留置針組立体。
The indwelling needle assembly according to claim 1 or 2,
The moving member is an indwelling needle assembly that is prevented from returning to the first position after moving to the second position by forming a notch having a cantilever-like shape.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-069278 | 2017-03-30 | ||
| JP2017069278A JP6864180B2 (en) | 2017-03-30 | 2017-03-30 | Indwelling needle assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2018181728A1 true WO2018181728A1 (en) | 2018-10-04 |
Family
ID=63678250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2018/013286 WO2018181728A1 (en) | 2017-03-30 | 2018-03-29 | Indwelling needle assembly |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6864180B2 (en) |
| TW (1) | TWI735772B (en) |
| WO (1) | WO2018181728A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201900001685A1 (en) | 2019-02-06 | 2020-08-06 | Sol Millennium Swiss R&D Center Sa | MEDICAL DEVICE WITH OFFSET CANNULA |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6056726A (en) * | 1994-02-28 | 2000-05-02 | Isaacson; Dennis Ray | Self-contained safety intravenous catheter insertion device |
| JP2004533278A (en) * | 2001-02-21 | 2004-11-04 | セルポムド リミテッド | Small catheter insertion device |
| US20090131872A1 (en) * | 2004-12-28 | 2009-05-21 | Sergey Popov | Catheter placement device |
| JP2013022263A (en) * | 2011-07-21 | 2013-02-04 | Top Corp | Indwelling needle assembly |
| JP2016506282A (en) * | 2013-01-11 | 2016-03-03 | 江蘇磐宇科技有限公司Ｓｕｎｗｅｌｌ Ｂｉｏｔｅｃｈ Ｃｏ．， Ｌｔｄ． | Safe vein indwelling needle |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011045543A (en) * | 2009-08-27 | 2011-03-10 | Terumo Corp | Indwelling needle assembly |
| EP2489393A4 (en) * | 2009-10-16 | 2013-04-03 | Terumo Corp | Placement needle and placement needle assembly |
-
2017
- 2017-03-30 JP JP2017069278A patent/JP6864180B2/en active Active
-
2018
- 2018-03-29 WO PCT/JP2018/013286 patent/WO2018181728A1/en active Application Filing
- 2018-03-30 TW TW107111182A patent/TWI735772B/en active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6056726A (en) * | 1994-02-28 | 2000-05-02 | Isaacson; Dennis Ray | Self-contained safety intravenous catheter insertion device |
| JP2004533278A (en) * | 2001-02-21 | 2004-11-04 | セルポムド リミテッド | Small catheter insertion device |
| US20090131872A1 (en) * | 2004-12-28 | 2009-05-21 | Sergey Popov | Catheter placement device |
| JP2013022263A (en) * | 2011-07-21 | 2013-02-04 | Top Corp | Indwelling needle assembly |
| JP2016506282A (en) * | 2013-01-11 | 2016-03-03 | 江蘇磐宇科技有限公司Ｓｕｎｗｅｌｌ Ｂｉｏｔｅｃｈ Ｃｏ．， Ｌｔｄ． | Safe vein indwelling needle |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201840347A (en) | 2018-11-16 |
| JP6864180B2 (en) | 2021-04-28 |
| JP2018166992A (en) | 2018-11-01 |
| TWI735772B (en) | 2021-08-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101667192B1 (en) | Liquid medicine infuser and liquid medicine supply device including the same | |
| JP4509556B2 (en) | Injector device for placing a subcutaneous infusion set | |
| JP5550910B2 (en) | Injection device | |
| JP5042846B2 (en) | Device for injecting solid or semi-solid implants | |
| WO2014162377A1 (en) | Catheter assembly | |
| US20070293882A1 (en) | Pricking device for taking blood | |
| WO2007037207A1 (en) | Lancet assembly and puncture device | |
| JP2008511349A5 (en) | ||
| WO2005110225A1 (en) | Lancet assembly | |
| JPWO2007052655A1 (en) | Indwelling needle assembly | |
| JP5591221B2 (en) | Puncture device assembly and chemical injection device | |
| JPWO2007145204A1 (en) | Lancet assembly | |
| WO2018181728A1 (en) | Indwelling needle assembly | |
| JP2013192868A (en) | Catheter assembly | |
| JP2019051220A (en) | Detention needle assembly | |
| JP3892095B2 (en) | Syringe | |
| JP4361962B1 (en) | Container / Syringe | |
| JP5879062B2 (en) | Indwelling needle assembly | |
| WO2013172104A1 (en) | Catheter assembly | |
| JP4736042B2 (en) | Indwelling needle | |
| JP4736041B2 (en) | Indwelling needle | |
| JP2007289459A (en) | Syringe | |
| WO2022034904A1 (en) | Winged needle assembly, packaging material for winged needle assembly, cap for winged needle assembly, and winged needle assembly set | |
| WO2015076221A1 (en) | Needle assembly | |
| WO2020256071A1 (en) | Indwelling needle assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 18776703 Country of ref document: EP Kind code of ref document: A1 |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 18776703 Country of ref document: EP Kind code of ref document: A1 |