JP2019088725A - Indwelling needle - Google Patents
Indwelling needle Download PDFInfo
- Publication number
- JP2019088725A JP2019088725A JP2017221505A JP2017221505A JP2019088725A JP 2019088725 A JP2019088725 A JP 2019088725A JP 2017221505 A JP2017221505 A JP 2017221505A JP 2017221505 A JP2017221505 A JP 2017221505A JP 2019088725 A JP2019088725 A JP 2019088725A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- outer needle
- diameter portion
- needle
- cylindrical member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Media Introduction/Drainage Providing Device (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
本発明は、逆止弁を備える留置針に関する。 The present invention relates to an indwelling needle provided with a check valve.
従来、内針を挿通可能な外針と、外針の基端に設けられた外針基と、切込部を有する弾性部材からなる止血弁と、止血弁と外針基の内周面との間に形成され外針基の内周面と止血弁とで画成される領域内の空気を外針基の外へ逃すための通気路と、を備える留置針が知られている（例えば、特許文献１参照）。 Conventionally, an outer needle through which the inner needle can be inserted, an outer needle base provided at the proximal end of the outer needle, a hemostatic valve formed of an elastic member having a cutout, an inner peripheral surface of the hemostatic valve and the outer needle base There is known an indwelling needle including an air passage formed between the inner needle and the inner peripheral surface of the outer needle and defined in the hemostatic valve to release the air out of the outer needle (for example, , Patent Document 1).
この留置針は、内針を止血弁の切込部を通し外針の中に挿通させた状態で、患者の血管に刺すと、外針及び外針基内に流れ込む血液（フラッシュバック）によって外針及び外針基内の空気が通気路から排出される。そして、外針基内に血液が流れ込むことにより外針が血管に刺し込まれたことを確認した後、内針を抜く。そして、輸液バッグに接続された輸液ラインのコネクタを外針基に接続して止血弁を開弁させて輸液や薬液などの液体を患者に供給する。 The indwelling needle is inserted into the patient's blood vessel with the inner needle inserted through the incision of the hemostasis valve and into the outer needle, and then the blood is flushed out (flashback) flowing into the outer needle and outer needle base. Air in the needle and outer needle base is exhausted from the air passage. Then, after confirming that the outer needle has been pierced into the blood vessel by the blood flowing into the outer needle base, the inner needle is pulled out. Then, the connector of the infusion line connected to the infusion bag is connected to the outer needle base, the hemostatic valve is opened, and a liquid such as an infusion or a medical solution is supplied to the patient.
従来の留置針では、患者に供給される液体は止血弁の切込部を開弁させて供給されるため、外針基の内周面（特に止血弁側）にフラッシュバックの血液が残ってしまう虞があり、血液の滞留による血栓の発生、又は雑菌の繁殖、血液が残っている外針基を視認した患者などに不快感を与えるなどの問題が生じる虞がある。 In the conventional indwelling needle, since the liquid supplied to the patient is supplied by opening the incision of the hemostatic valve, the flashback blood remains on the inner peripheral surface (especially on the hemostatic valve side) of the outer needle base. This may cause problems such as occurrence of thrombus due to blood retention, breeding of bacteria, and discomfort to a patient who visually recognizes an outer needle group on which blood remains.
本発明は、以上の点に鑑み、外針基にフラッシュバックの血液が残り難い留置針を提供することを目的とする。 An object of this invention is to provide the indwelling needle which the blood of a flashback does not remain easily in an outer-needle base in view of the above point.
［１］上記目的を達成するため、本発明は、
内針が挿通可能な外針（例えば、実施形態の外針２。以下同一。）と、
前記外針の基端に設けられた筒状の外針基（例えば、実施形態の外針基３。以下同一。）と、
前記内針が挿通可能であり、且つ前記内針が抜かれた後に血液が前記外針基から漏れることを防止する止血弁（例えば、実施形態の止血弁４。以下同一。）と、を備える留置針（例えば、実施形態の留置針１。以下同一。）であって、
前記外針基内に基端位置から先端位置へと前進可能な内筒部材（例えば、実施形態の内筒部材６。以下同一。）が配置され、
前記止血弁は前記内筒部材に設けられ、
前記外針基の内周面には、小径部（例えば、実施形態の小径部７。以下同一。）と、前記小径部の先端側に位置し前記小径部よりも大径の大径部（例えば、実施形態の大径部８。以下同一。）とが設けられ、
前記内筒部材の外周面と内周面とを連通させる第１貫通孔（例えば、実施形態の第１貫通孔１７。以下同一。）及び第２貫通孔（例えば、実施形態の第２貫通孔１８。以下同一。）とが設けられ、
前記第２貫通孔は前記第１貫通孔に対して間隔を存して前記外針基の基端側に位置しており、
前記内筒部材には、前記第１貫通孔を介した血液の通過を阻止し、空気の通過を許容する通気フィルタ（例えば、実施形態の通気フィルタ１４。以下同一。）が設けられ、
前記内筒部材が前記基端位置に位置するときには、前記小径部によって前記第２貫通孔と前記大径部との連通が阻止されるように、前記第２貫通孔が位置しており、且つ、前記第１貫通孔から前記大径部内の空気が前記通気フィルタを通過して前記外針基の外に排出自在となるように、前記第１貫通孔が位置しており、
前記内筒部材が前記先端位置に位置するときには、前記第２貫通孔と前記大径部とが連通し、前記外針基の基端側から前記内筒部材内に供給された液体が前記第２貫通孔、及び前記大径部を通過して、前記外針から供給可能となるように、前記第２貫通孔が位置していることを特徴とする。
[1] In order to achieve the above object, the present invention is
An outer needle through which the inner needle can be inserted (for example, the outer needle 2 of the embodiment, hereinafter the same);
A tubular outer needle base (for example, the outer needle base 3 according to the embodiment, hereinafter the same) provided at the proximal end of the outer needle;
The hemostatic valve (for example, the hemostatic valve 4 according to the embodiment, which is the same hereinafter) capable of inserting the inner needle and preventing blood from leaking from the outer needle group after the inner needle is withdrawn; A needle (e.g., the indwelling needle 1 of the embodiment, hereinafter the same),
An inner cylindrical member (for example, the inner cylindrical member 6 of the embodiment, hereinafter the same) which can be advanced from the proximal end position to the distal end position is disposed in the outer needle base,
The hemostatic valve is provided on the inner cylinder member,
On the inner peripheral surface of the outer needle base, a small diameter portion (for example, the small diameter portion 7 of the embodiment, hereinafter the same) and a large diameter portion located on the tip side of the small diameter portion and larger in diameter than the small diameter portion For example, the large diameter portion 8 of the embodiment (hereinafter the same.) Is provided,
A first through hole (for example, the first through hole 17 in the embodiment, hereinafter the same) and a second through hole (for example, the second through hole in the embodiment) for communicating the outer peripheral surface and the inner peripheral surface of the inner cylindrical member. 18. The same applies below) and
The second through hole is located on the base end side of the outer needle base at a distance from the first through hole,
The inner cylinder member is provided with a ventilation filter (for example, the ventilation filter 14 of the embodiment, hereinafter the same) that blocks the passage of blood through the first through hole and allows the passage of air.
The second through hole is positioned such that communication between the second through hole and the large diameter portion is blocked by the small diameter portion when the inner cylindrical member is positioned at the base end position, and The first through hole is positioned such that the air in the large diameter portion can pass through the venting filter from the first through hole and can be discharged out of the outer needle base,
When the inner cylindrical member is positioned at the distal end position, the second through hole and the large diameter portion communicate with each other, and the liquid supplied into the inner cylindrical member from the base end side of the outer needle base is the second one. (2) The second through hole is positioned so as to pass through the through hole and the large diameter portion and can be supplied from the outer needle.
本発明によれば、内筒部材が基端位置に位置するときには、内筒部材に設けられた第２貫通孔は大径部と接続されておらず、止血弁によって血液が外針基からこぼれることを防止することができる。そして、輸液や薬液などの液体を患者に供給するときには、内筒部材を先端位置へ移動させることにより、内筒部材に設けられた第２貫通孔と大径部とが接続され、液体が内筒部材内、第２貫通孔及び大径部を介して止血弁の周りから外針を通過して患者に供給される。 According to the present invention, when the inner cylinder member is positioned at the base end position, the second through hole provided in the inner cylinder member is not connected to the large diameter portion, and blood is spilled from the outer needle base by the hemostatic valve. Can be prevented. When the liquid such as an infusion solution or a drug solution is supplied to the patient, the second through hole and the large diameter portion provided in the inner cylinder member are connected by moving the inner cylinder member to the tip position, and the liquid In the cylindrical member, through the second through hole and the large diameter portion, it is supplied to the patient from around the hemostatic valve through the outer needle.
したがって、従来の留置針のように弁体の切込部から液体が供給されず、止血弁の周りから液体が供給されることにより、外針基の内周面（特に止血弁側）に残り易いフラッシュバックの血液を患者に供給される液体とともに患者に戻すことができ、外針基にフラッシュバックの血液が残ることを抑制して、患者などへ不快感を与えることを抑制することができる。 Therefore, as in the conventional indwelling needle, the liquid is not supplied from the cut portion of the valve body, and the liquid is supplied from the periphery of the hemostasis valve, so that it remains on the inner peripheral surface of the outer needle base (especially the hemostasis valve side). The easy flashback blood can be returned to the patient together with the liquid supplied to the patient, and the residual flashback blood on the outer needle group can be suppressed to suppress discomfort to the patient etc. .
［２］また、本発明においては、前記通気フィルタは、環状体で構成され、前記内筒部材内に挿入されて、前記第１貫通孔を内側から覆うことが好ましい。 [2] Further, in the present invention, it is preferable that the ventilation filter be formed of an annular body, and be inserted into the inner cylindrical member to cover the first through hole from the inside.
通気フィルタの取り付け方法としては、第１貫通孔に通気フィルタを挿入するなどの様々な取り付け方法が考えられるが、上述したように、通気フィルタを環状体で構成し、内筒部材に挿入して取り付けることにより、通気フィルタを内筒部材内に容易に取り付けることができる。また、第１貫通孔が周方向に間隔を存して複数設けられている場合においても１つの環状体からなる通気フィルタで全ての第１貫通孔を内側から覆うことができ、第１貫通孔ごとに通気フィルタを設ける場合と比較して、組立工程の簡略化を図ることができる。 As a method of attaching the ventilation filter, various attachment methods such as inserting the ventilation filter into the first through hole can be considered. However, as described above, the ventilation filter is formed of an annular body and inserted into the inner cylindrical member. By mounting, the ventilation filter can be easily mounted in the inner cylinder member. Further, even when the plurality of first through holes are provided at intervals in the circumferential direction, it is possible to cover all the first through holes from the inside with a ventilation filter consisting of one annular body, and the first through holes The assembling process can be simplified as compared with the case where the ventilation filter is provided for each case.
本発明の実施形態の留置針を図１から図５を参照して説明する。 The indwelling needle of the embodiment of the present invention will be described with reference to FIGS. 1 to 5.
図１の斜視図及び図２の分解図に示すように、本実施形態の留置針１は、内針（図示省略）が挿通可能な外針２と、外針２の基端に設けられた筒状の外針基３と、内針が挿通可能であり、且つ内針が抜かれた後にフラッシュバックの血液が外針基３から漏れることを防止する止血弁４と、外針基３内の空気を外針基３の基端側から外針基３の外へ通過させ外針基３内のフラッシュバックの血液の通過を抑制又は阻止する環状の通気フィルタ１４と、を備える。通気フィルタ１４は、フラッシュバックの血液の通過を抑制し、空気の通過は許容できるように多孔質体（例えば、ポリエチレンの焼結体またはポリウレタン等）などで形成されている。 As shown in the perspective view of FIG. 1 and the exploded view of FIG. 2, the indwelling needle 1 of the present embodiment is provided at the proximal end of the outer needle 2 and the outer needle 2 through which the inner needle (not shown) can be inserted. A tubular outer needle base 3, a hemostasis valve 4 which can be inserted through the inner needle, and which prevents the flashback blood from leaking out of the outer needle base 3 after the inner needle is pulled out; And an annular ventilation filter for passing air from the proximal end side of the outer needle group 3 to the outside of the outer needle group 3 to suppress or block the passage of blood in the flashback in the outer needle group 3. The ventilation filter 14 is formed of a porous body (for example, a sintered body of polyethylene, polyurethane, or the like) so as to suppress the passage of blood in the flashback and allow the passage of air.
外針基３内には、円筒状の内筒部材６が配置されている。内筒部材６は、外針基３内で外針基３の先端方向へ移動可能であり、実施形態の説明においては、先端方向へ移動する前の初期の位置を基端位置、先端方向への前進移動が完了した位置を先端位置、として定義する。 A cylindrical inner cylinder member 6 is disposed in the outer needle base 3. The inner cylinder member 6 is movable in the outer needle base 3 toward the distal direction of the outer needle base 3. In the description of the embodiment, the initial position before moving in the distal direction is the proximal position, the distal direction The position at which the forward movement of H has been completed is defined as the tip position.
止血弁４は、円柱状の弾性部材で形成されており、中央部に先端から基端まで切り込まれた切込部４ａが設けられている。図示省略した内針はこの切込部４ａを通過して外針２に挿通される。また、止血弁４は、内筒部材６内に挿入されている。内筒部材６の先端縁には、止血弁４が先方へ脱落することを防止するための係止部が径方向内方へ突出して設けられている。また、止血弁４の基端側に連なるようにして環状の通気フィルタ１４も内筒部材６内に挿入されている。 The hemostatic valve 4 is formed of a cylindrical elastic member, and is provided with a cutting portion 4a cut from the tip to the proximal end in the central portion. The inner needle (not shown) passes through the incision 4 a and is inserted into the outer needle 2. In addition, the hemostatic valve 4 is inserted into the inner cylindrical member 6. At the tip end edge of the inner cylindrical member 6, a locking portion for preventing the hemostatic valve 4 from falling forward is provided so as to protrude radially inward. Further, an annular ventilation filter 14 is also inserted into the inner cylindrical member 6 so as to be continuous with the proximal end side of the hemostatic valve 4.
外針基３の内周面には、内筒部材６の外径と同一（略同一を含む。少なくともフラッシュバックの血液が通過できないように設定される。）の内径に設定された小径部７と、小径部７よりも先端側に位置し小径部７よりも大径の大径部８とが設けられている。 The inner peripheral surface of the outer needle base 3 has the same inner diameter as the outer diameter of the inner cylindrical member 6 (including approximately the same diameter. At least the blood of flashback is set to be unable to pass). And a large diameter portion 8 which is located on the tip side of the small diameter portion 7 and has a diameter larger than the small diameter portion 7.
内筒部材６には、周方向に間隔を存して等間隔に配置され、且つ内筒部材６の外周面と内周面とを連通させる４つの第１貫通孔１７が設けられている。また、内筒部材６には、第１貫通孔１７に対して間隔を存して基端側に４つの第２貫通孔１８が設けられている。第２貫通孔１８も周方向に間隔を存して等間隔に配置されている。 The inner cylinder member 6 is provided with four first through holes 17 which are arranged at equal intervals in the circumferential direction and at which the outer peripheral surface of the inner cylinder member 6 and the inner peripheral surface communicate with each other. Further, in the inner cylindrical member 6, four second through holes 18 are provided on the base end side at an interval from the first through holes 17. The second through holes 18 are also arranged at equal intervals in the circumferential direction.
第１貫通孔１７は通気フィルタ１４によって内筒部材６の内側から覆われている。 The first through hole 17 is covered by the ventilation filter 14 from the inside of the inner cylindrical member 6.
図３に示すように、内筒部材６が外針基３内で基端位置に位置している場合には、外針基３の内周面と内筒部材６の外周面との間において、第２貫通孔１８と大径部８との連通（接続）が小径部７によって阻止される。また、内筒部材６が基端位置に位置しているときには、外針２及び外針基３内の空気は、外針２からフラッシュバックの血液が流入するときに、第１貫通孔１７及び多孔質体からなる通気フィルタ１４を通って、外針基３の基端開口から排出される。図３の矢印は大径部８内の空気が血液の流入によって排出される流れを示している。 As shown in FIG. 3, when the inner cylindrical member 6 is located at the base end position in the outer needle base 3, between the inner peripheral surface of the outer needle base 3 and the outer peripheral surface of the inner cylindrical member 6 Communication (connection) between the second through hole 18 and the large diameter portion 8 is blocked by the small diameter portion 7. In addition, when the inner cylindrical member 6 is positioned at the base end position, the air in the outer needle 2 and the outer needle base 3 is discharged from the first through hole 17 when blood in flashback flows from the outer needle 2. The air is discharged from the proximal end opening of the outer needle base 3 through the air flow filter 14 made of a porous body. Arrows in FIG. 3 indicate a flow in which the air in the large diameter portion 8 is discharged by the inflow of blood.
逆に、図４の斜視図及び図５の断面図に示すように、内筒部材６が外針基３内で先端位置に位置している場合には、第２貫通孔１８と大径部８とが接続される。図５の矢印は輸液や薬液などの液体の流れを示している。 Conversely, as shown in the perspective view of FIG. 4 and the cross-sectional view of FIG. 5, when the inner cylindrical member 6 is positioned at the tip end position in the outer needle base 3, the second through hole 18 and the large diameter portion 8 are connected. Arrows in FIG. 5 indicate the flow of liquid such as infusion solution and drug solution.
第１実施形態の留置針１によれば、内筒部材６が基端位置に位置するときには、内筒部材６の外周面に設けられた第２貫通孔１８が大径部８との接続が小径部７によって阻止され、止血弁４によってフラッシュバックの血液が外針基３からこぼれることを防止することができる。そして、輸液や薬液などの液体を患者に供給するときには、外針基３に接続する雄コネクタ１１などを利用して内筒部材６を押圧して先端位置へ移動させることにより、内筒部材６に設けられた第２貫通孔１８と大径部８とが連通（接続）され、液体が第２貫通孔及び大径部８を介して止血弁４の周りから外針２を通過して患者に供給される。 According to the indwelling needle 1 of the first embodiment, the second through hole 18 provided on the outer peripheral surface of the inner cylindrical member 6 is connected to the large diameter portion 8 when the inner cylindrical member 6 is positioned at the base end position. It is blocked by the small diameter portion 7 and the hemostatic valve 4 can prevent the flashback blood from spilling out of the outer needle base 3. Then, when a liquid such as an infusion solution or a drug solution is supplied to the patient, the inner cylindrical member 6 is moved to the tip position by pressing the inner cylindrical member 6 using the male connector 11 connected to the outer needle base 3 or the like. The second through hole 18 and the large diameter portion 8 provided in the communication are communicated (connected), and the liquid passes through the outer needle 2 from around the hemostasis valve 4 through the second through hole and the large diameter portion 8 and the patient Supplied to
したがって、従来の留置針のように止血弁４の切込部から液体が供給されることなく、止血弁４の周りから液体が供給されることにより、外針基３の内周面（特に止血弁４側）に残り易いフラッシュバックの血液を患者に供給される液体と共に患者に戻すことができ、外針基３にフラッシュバックの血液が残ることを抑制して、血液の滞留による血栓の発生または雑菌の繁殖、患者などへ不快感を与えることを抑制することができる。 Therefore, the liquid is supplied from the periphery of the hemostasis valve 4 without the liquid being supplied from the incised portion of the hemostasis valve 4 as in the conventional indwelling needle, the inner peripheral surface of the outer needle base 3 (especially hemostasis Flashback blood that tends to remain on the valve 4 side can be returned to the patient together with the fluid supplied to the patient, and the occurrence of blood clotting due to blood retention is suppressed by preventing the flashback blood from remaining on the outer needle group 3 Or, it can suppress breeding of various bacteria, giving discomfort to patients and the like.
また、第２貫通孔１８によって内筒部材６の内周面と外周面とを連通されているため、外針基３の基端から供給される輸液や薬液などの液体を、内針を挿通可能な内筒部材６の内側の空間も利用して患者に供給することができ、液体供給時の抵抗を軽減させることができる。 Further, since the inner peripheral surface and the outer peripheral surface of the inner cylinder member 6 are communicated with each other by the second through hole 18, the inner needle is inserted through a liquid such as an infusion solution or a drug solution supplied from the proximal end of the outer needle base 3. The space inside the possible inner cylinder member 6 can also be supplied to the patient, and the resistance at the time of liquid supply can be reduced.
また、通気フィルタの取り付け方法としては、第１貫通孔１７に通気フィルタを挿入するなどの様々な取り付け方法が考えられるが、上述したように、通気フィルタ１４を環状体で構成し、内筒部材６に挿入して取り付けることにより、通気フィルタ１４を内筒部材６内に容易に取り付けることができる。また、第１貫通孔１７が周方向に間隔を存して４つ設けられていても１つの環状体からなる通気フィルタ１４で全ての第１貫通孔１７を内側から覆うことができ、第１貫通孔１７ごとに通気フィルタを設ける場合と比較して、組立工程の簡略化を図ることができる。なお、通気フィルタ１４を第１貫通孔１７ごとに挿入するようにしてもよい。これによっても、本発明のフラッシュバックの血液が外針基３内に残り難くすることができるという作用効果を奏することができる。 Also, as a method of mounting the ventilation filter, various mounting methods such as inserting the ventilation filter into the first through hole 17 can be considered, but as described above, the ventilation filter 14 is configured by an annular body and the inner cylinder member The ventilation filter 14 can be easily attached to the inner cylinder member 6 by inserting and attaching to 6. Further, even if four first through holes 17 are provided at intervals in the circumferential direction, all the first through holes 17 can be covered from the inside by the ventilation filter 14 consisting of one annular body, As compared with the case of providing a ventilation filter for each through hole 17, simplification of the assembly process can be achieved. The ventilation filter 14 may be inserted into each first through hole 17. Also in this case, it is possible to exhibit the effect that the blood of the flashback of the present invention can be made difficult to remain in the outer needle base 3.
なお、本実施形態においては、内筒部材６内に止血弁４を設けたものを説明したが、本発明の止血弁はこれに限らず、例えば、内筒部材６の先端縁に先方へ突出する突出部を形成し、この突出部の先端外周面に径方向外方へ膨らむように張り出した膨出部を形成して、この膨出部および内筒部材６の先端開口を通常時は閉塞するように覆う断面Ｃ字状の止血弁を内筒部材６の先端に設けてもよい。 In the present embodiment, although the one in which the hemostatic valve 4 is provided in the inner cylindrical member 6 has been described, the hemostatic valve of the present invention is not limited to this. For example, the distal end edge of the inner cylindrical member 6 protrudes forward A protruding portion is formed, and a protruding portion protruding so as to expand radially outward is formed on the tip outer peripheral surface of the protruding portion, and the protruding portion and the tip opening of the inner cylindrical member 6 are closed normally A hemostatic valve having a C-shaped cross section may be provided at the tip of the inner cylindrical member 6 so as to cover it.
また、本実施形態においては、第２貫通孔１８は、内筒部材６の基端から間隔を存して穿設されているものを説明したが、本発明の第２貫通孔は、内筒部材６の基端まで達して穿設されていてもよい。 Further, in the present embodiment, the second through hole 18 has been described as being bored at an interval from the base end of the inner cylindrical member 6, but the second through hole of the present invention is an inner cylinder It may be drilled to reach the proximal end of the member 6.
また、内筒部材６の内周面に強度向上のためのリブを設けてもよい。また、第１貫通孔及び第２貫通孔は４つに限らず、１つであっても複数であってもよく、また、第１貫通孔と第２貫通孔とで数が異なっていてもよい。 In addition, a rib may be provided on the inner peripheral surface of the inner cylindrical member 6 to improve the strength. Further, the number of the first through holes and the number of the second through holes are not limited to four, and may be one or more, and even if the number of the first through holes and the number of the second through holes are different. Good.
１ 留置針
２ 外針
３ 外針基
４ 止血弁
４ａ 切込部
６ 内筒部材
７ 小径部
８ 大径部
１１ 雄コネクタ
１４ 通気フィルタ
１７ 第１貫通孔
１８ 第２貫通孔
REFERENCE SIGNS LIST 1 indwelling needle 2 outer needle 3 outer needle base 4 hemostatic valve 4 a cut portion 6 inner cylindrical member 7 small diameter portion 8 large diameter portion 11 male connector 14 ventilation filter 17 first through hole 18 second through hole
Claims (2)
前記外針の基端に設けられた筒状の外針基と、
前記内針が挿通可能であり、且つ前記内針が抜かれた後に血液が前記外針基から漏れることを防止する止血弁と、を備える留置針であって、
前記外針基内に基端位置から先端位置へと前進可能な内筒部材が配置され、
前記止血弁は前記内筒部材に設けられ、
前記外針基の内周面には、小径部と、前記小径部の先端側に位置し前記小径部よりも大径の大径部とが設けられ、
前記内筒部材の外周面と内周面とを連通させる第１貫通孔及び第２貫通孔とが設けられ、
前記第２貫通孔は前記第１貫通孔に対して間隔を存して前記外針基の基端側に位置しており、
前記内筒部材には、前記第１貫通孔を介した血液の通過を阻止し、空気の通過を許容する通気フィルタが設けられ、
前記内筒部材が前記基端位置に位置するときには、前記外針基の内周面と前記内筒部材の外周面との間における前記第２貫通孔と前記大径部との連通が前記小径部によって阻止されるように、前記第２貫通孔が位置しており、且つ、前記第１貫通孔から前記大径部内の空気が前記通気フィルタを通過して前記外針基の外に排出自在となるように、前記第１貫通孔が位置しており、
前記内筒部材が前記先端位置に位置するときには、前記第２貫通孔と前記大径部とが連通し、前記外針基の基端側から前記内筒部材内に供給された液体が前記第２貫通孔、及び前記大径部を通過して、前記外針から供給可能となるように、前記第２貫通孔が位置していることを特徴とする留置針。 An outer needle through which an inner needle can be inserted;
A cylindrical outer needle base provided at the proximal end of the outer needle;
A hemostasis valve including: a hemostasis valve through which the inner needle can be inserted and which prevents blood from leaking from the outer needle group after the inner needle is withdrawn;
An inner cylindrical member capable of advancing from a proximal end position to a distal end position is disposed in the outer needle base,
The hemostatic valve is provided on the inner cylinder member,
The inner peripheral surface of the outer needle base is provided with a small diameter portion and a large diameter portion located on the tip end side of the small diameter portion and larger in diameter than the small diameter portion.
There are provided a first through hole and a second through hole which communicate the outer peripheral surface and the inner peripheral surface of the inner cylindrical member with each other.
The second through hole is located on the base end side of the outer needle base at a distance from the first through hole,
The inner cylinder member is provided with a ventilation filter that blocks the passage of blood through the first through hole and allows the passage of air.
When the inner cylindrical member is positioned at the base end position, the communication between the second through hole and the large diameter portion between the inner peripheral surface of the outer needle base and the outer peripheral surface of the inner cylindrical member is the small diameter And the second through hole is positioned so that the air in the large diameter portion can be discharged from the first through hole through the ventilation filter and out of the outer needle base. The first through hole is located to be
When the inner cylindrical member is positioned at the distal end position, the second through hole and the large diameter portion communicate with each other, and the liquid supplied into the inner cylindrical member from the base end side of the outer needle base is the second (2) The indwelling needle characterized in that the second through hole is positioned so that it can be supplied from the outer needle through the through hole and the large diameter portion.
前記通気フィルタは、環状体で構成され、前記内筒部材内に挿入されて、前記第１貫通孔を内側から覆うものであることを特徴とする留置針。 The indwelling needle according to claim 1, wherein
The indwelling needle according to claim 1, wherein the ventilation filter is formed of an annular body and is inserted into the inner cylindrical member to cover the first through hole from the inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017221505A JP6978658B2 (en) | 2017-11-17 | 2017-11-17 | Indwelling needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017221505A JP6978658B2 (en) | 2017-11-17 | 2017-11-17 | Indwelling needle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2019088725A true JP2019088725A (en) | 2019-06-13 |
| JP6978658B2 JP6978658B2 (en) | 2021-12-08 |
Family
ID=66835330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2017221505A Active JP6978658B2 (en) | 2017-11-17 | 2017-11-17 | Indwelling needle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6978658B2 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070083162A1 (en) * | 2005-10-11 | 2007-04-12 | Span-America Medical Systems, Inc. | Valve for intravenous catheter |
| JP2012517327A (en) * | 2009-02-11 | 2012-08-02 | ベクトン・ディキンソン・アンド・カンパニー | System and method for providing a flow control valve for a medical device |
| JP2013070870A (en) * | 2011-09-28 | 2013-04-22 | Terumo Corp | Catheter assembly |
| JP2013534454A (en) * | 2010-07-15 | 2013-09-05 | ベクトン・ディキンソン・アンド・カンパニー | Catheter assembly and perforated septum valve |
| WO2015133279A1 (en) * | 2014-03-05 | 2015-09-11 | テルモ株式会社 | Catheter assembly |
-
2017
- 2017-11-17 JP JP2017221505A patent/JP6978658B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070083162A1 (en) * | 2005-10-11 | 2007-04-12 | Span-America Medical Systems, Inc. | Valve for intravenous catheter |
| JP2012517327A (en) * | 2009-02-11 | 2012-08-02 | ベクトン・ディキンソン・アンド・カンパニー | System and method for providing a flow control valve for a medical device |
| JP2013534454A (en) * | 2010-07-15 | 2013-09-05 | ベクトン・ディキンソン・アンド・カンパニー | Catheter assembly and perforated septum valve |
| JP2013070870A (en) * | 2011-09-28 | 2013-04-22 | Terumo Corp | Catheter assembly |
| WO2015133279A1 (en) * | 2014-03-05 | 2015-09-11 | テルモ株式会社 | Catheter assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| JP6978658B2 (en) | 2021-12-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5877196B2 (en) | Catheter assembly | |
| ES2708204T3 (en) | Catheter adapter with port that has a combined port and a vented blood control valve | |
| JPH0613744Y2 (en) | Puncture needle | |
| EP3096829B1 (en) | Ported catheter adapter with integrated septum actuator retention | |
| JP5244811B2 (en) | Housing vent vascular access device | |
| EP3077038B1 (en) | Cuttable catheter hub with integrated hemostasis valve | |
| JP6864087B2 (en) | Septum housing | |
| US6524277B1 (en) | Method and apparatus for an intravascular device showing flashback | |
| BR112014029186B1 (en) | SOFT TIP MEDICAL INSTRUMENT FOR OPHTHALMIC SURGICAL PROCEDURES AND METHOD FOR FORMING A MEDICAL INSTRUMENT | |
| JP2014514020A (en) | Apparatus and method for compensating compressive force in an intravascular device | |
| US12017011B2 (en) | Intravenous catheter device | |
| JP2019088580A (en) | Indwelling needle | |
| JP2001046507A (en) | Retaining needle | |
| JP2019088725A (en) | Indwelling needle | |
| WO2020022059A1 (en) | Indwelling needle assembly | |
| JP6889820B2 (en) | Indwelling needle assembly | |
| JP7053978B2 (en) | Indwelling needle | |
| JPWO2015133279A1 (en) | Catheter assembly | |
| US20120004644A1 (en) | Pleural drainage system locking dilator | |
| JP2012045156A (en) | Puncture needle and puncture needle lead-in appliance with puncture needle | |
| CN211583397U (en) | Blood return observation structure of puncture device and puncture structure assembly | |
| JP2010200788A (en) | Medical valve body and medical insertion assisting device | |
| WO2018096549A1 (en) | Intravenous catheter with a self-activating mechanism for preventing back-flow of blood | |
| JPH0116190B2 (en) | ||
| JP2013126499A (en) | Connector, and connection mechanism using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20201015 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20210913 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20210928 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20211021 |
|
| R150 | Certificate of patent or registration of utility model |
Ref document number: 6978658 Country of ref document: JP Free format text: JAPANESE INTERMEDIATE CODE: R150 |