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JP3829318B2 - Tissue sampling needle - Google Patents
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JP3829318B2 - Tissue sampling needle - Google Patents

Tissue sampling needle Download PDF

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Publication number
JP3829318B2
JP3829318B2 JP2001331311A JP2001331311A JP3829318B2 JP 3829318 B2 JP3829318 B2 JP 3829318B2 JP 2001331311 A JP2001331311 A JP 2001331311A JP 2001331311 A JP2001331311 A JP 2001331311A JP 3829318 B2 JP3829318 B2 JP 3829318B2
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Prior art keywords
outer needle
needle
hollow
inner tube
tissue
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JP2003126106A (en
Inventor
徳寛 比恵島
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Nipro Corp
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Nipro Corp
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Description

【0001】
【発明が属する技術分野】
本発明はヒト並びに動物の組織を採取する針に関し、さらに詳細には、体外受精ならびに顕微受精を行うために、ヒト並びに動物の体内の卵巣から卵子を吸引採取するために使用する組織採取針に関する。
【0002】
【従来の技術】
ヒトまたは動物の卵巣から卵子を採取するに当たって、一般的には、経膣用超音波プローブに組織採取針をセットして、超音波エコー下に膣から組織採取針を穿刺し、卵巣に組織採取針を到達させる。卵巣内に洗浄液を注入して、該卵巣中の卵胞を吸引して卵子を採取する。組織採取針には、超音波を反射するエコーガイドが組織採取針の先端部に設けられている。このような組織採取針には、シングルニードルの超音波組織採取針を卵巣に穿刺し、シリンジで洗浄液を注入し、その後、別のシリンジで卵子を採取する操作を繰り返すものがある。しかし、この方法は1つのシリンジを別なシリンジに差し替える操作の間に、刃先が振れたり、洗浄液の逆流あるいは漏出がおこるために、卵子の採取に時間がかかり、また、卵子の採取率も低いとの欠点を有していた。その後、2つのルーメンを有するダブルルーメン組織採取針が開発され、術者が卵巣を穿刺して卵胞の卵子を確認し、補助者がシリンジにて洗浄液を注入しながら、吸引器を用いて同時に吸引を行うことが可能となった。このような2つのルーメンを有する組織採取針を用いた方法において、採卵時間および採卵率は向上することが可能となった。
【0003】
【発明が解決しようとする課題】
しかしながら、従来のダブルルーメン針では、洗浄液の注入口と卵子の吸引口が同一刃面上もしくは刃面内側に存在するため、洗浄と吸引を同時に行った際には、洗浄液を十分多量に注入しないと、洗浄液が卵胞内に注入する前に全て吸引されることになり、補助者は勢いよく洗浄液を注入しなければならなかった。
【0004】
【課題を解決するための手段】
本発明者らは、上記課題を解決するために、鋭意検討したところ、金属外針と内管を二重構造とし、内管を水分の変化(通常の湿度条件から洗浄液および体液の存在する条件への変化)および/あるいは温度の変化(室温から体温)により寸法変形する材料を採用することにより、卵巣へ組織採取針を穿刺した後、洗浄液から該内管が水分を吸収して、または温度変化により変形し、かつ伸長して、穿刺した金属外針の刃面から突出した内管から組織を吸引することにより、洗浄液注入口と組織吸引口の位置が離れて、洗浄液を直接に吸引することを防ぐことを見出し、本発明に到達した。
【0005】
すなわち、本発明は先端に刃先が設けられた中空金属外針と、該外針に内装された中空内管と、該外針および該内管の基端部をそれぞれ固定する手段を備えた分岐コネクターとからなり、該内管が伸長することにより、内管先端部が該外針刃面より前方に突出することを特徴とする組織採取針である。
【0006】
また、本発明は先端に刃先が設けられた中空金属外針と、該外針に内装された中空内管と、該外針および該内管の基端部をそれぞれ固定する手段を備えた分岐コネクターとからなり、前記中空金属外針と前記中空内管との間に空隙が形成され、かつ、該空隙は金属外針基端部の分岐コネクターにより中空金属外針および中空内管の軸方向から側方に開放された液注入ルートおよび前記外針刃面より内側に開口部を有し、かつ、外針針基の分岐コネクターの内部を通過する組織吸引ルートを形成し、前記内管が伸長することにより、内管先端部が該外針刃面より前方に突出することを特徴とする組織採取針である。
【0007】
【発明の実施の態様】
本発明における組織採取針とは、先端に刃先が設けられた中空金属外針と、該外針に内装された中空内管と、該外針および該内管の基端部をそれぞれ固定する手段を備えた分岐コネクターとからなる。
中空金属外針とは、その外形は内部が連通する管状体であり、その先端部には刃先が設けられている。その刃先形状は、通常、先端が鋭利な刃面である。外径、内径および長さは特に制限されないが、通常、外径は、0.5〜2.5mm、好ましくは1.4〜1.8mmであり、内径は0.3〜2.2mm、好ましくは1.0〜1.6mmであり、長さは通常、50〜450mm、好ましくは200〜400mmである。これらの外径、内径または長さはその使用目的に応じて、適宜選択される。
金属としては、ステンレス、チタン、ニッケルチタン合金などが挙げられる。外針には超音波エコーを反射するエコーガイドがその先端に設けられていることが好ましい。
【0008】
本発明における内管とは、該外針に内装された中空内管である。内管と外針との長さは、使用前には前者が後者と同じまたはより短いことが必須である。 該外針および該内管の基端部はそれぞれを固定する手段を備えた分岐コネクターに連結される。前記中空金属外針と前記中空内管との間に空隙が形成され、かつ、該空隙は金属外針基端部の分岐コネクターにより中空金属外針および中空内管の軸方向から側方に開放された液注入ルートおよび前記外針刃面より内側に開口部を有し、かつ、外針針基の分岐コネクターの内部を通過する組織吸引ルートを形成する。
本発明では、前記内管が伸長することにより、内管先端部が該外針刃面より前方に突出することを特徴とする。
【0009】
前記中空の内管は、水分または温度の変化により伸長する材料からなる。このような材料としては吸水性合成樹脂または形状記憶合金がある。吸水性樹脂としては、ポリウレタン、ナイロン、エチレン・酢酸ビニル共重合体(EVA)、ポリビニルアルコール(PVA)、エチレン・ビニルアルコール共重合体(EVOH)などの吸水性樹脂などが例示される。 また、形状記憶合金としては、Ni-Ti、Ni-Ti-Co、In-Tl、Fe-Mn、Fe-Ni-Ti-Coなどの合金が例示される。
これらの材料のうち、吸水性樹脂としては、具体的には、室温(約20℃)で湿度50%の環境から、体温(約36℃)で湿度100%の環境の変化において、0.1〜30%の形状変化をもたらす樹脂が好ましい。ここで、このような温度および湿度の変化において、材料の含水率は、0.5%〜40%へ変化しているものと推定される。また、別な材料としては、37℃付近にAF点(オーステナイト逆終了変態点)を設定された形状記憶合金が好ましい。
さらに、本発明の内管は吸水性合成樹脂または形状記憶合金から形成された管と金属管とを接続した構造を有していてもよい。また、吸水性合成樹脂または形状記憶合金から形成された管と他の合成樹脂から形成された管とを接続した構造を有していてもよい。先端部分は形状変化をもたらす樹脂であることが好ましい。
【0010】
本発明における分岐コネクターとは、該外針の基端部と該外針に内挿された内管の基端部をそれぞれ固定するものである。このような分岐コネクターは、下記洗浄液注入ルートおよび組織吸引ルートを形成されるものである。
【0011】
前記中空金属外針と前記中空内管との間には空隙が形成されている。該空隙は金属外針基端部の分岐コネクターにより中空金属外針および中空内管の軸方向から側方に開放された液注入ルートおよび前記外針刃面より内側に開口部を有し、かつ、外針針基の分岐コネクターの内部を通過する組織吸引ルートを形成する。
【0012】
上記液注入ルートには、洗浄液を注入するための洗浄ラインチューブのルアーコネクターが接続される。また、上記組織吸引ルートには、採取された組織を貯留するための試験管の接続された吸引ラインチューブのルアーコネクターが接続されている。
洗浄操作は、シリンジにヘパリン化生食や培養液が充填され、洗浄液として、ルアーコネクターから直接もしくは延長チューブを介して注入される。また、吸引操作は接続された試験管付きの吸引ラインへ、吸引器を接続し断続的に空気を陰圧に吸引する事により試験管内への組織の採取を行う。
【0013】
本発明の組織採取針を使用するに当たって、まず、膣を経由して、該採取針を卵巣へ輸送し、目的部位にて中空金属外針刃面先端を穿刺する。次いで、水分または温度の変化によって内管形状を変化させて、前記外針先端より前方へ内管先端を伸長させる。次いで、あるいは同時に液注入ルートを経由して外針と内針の間の空隙から洗浄水を送水する。洗浄液とともに卵子を内管の開口部から吸引して、組織採取ルートを経て、所定の容器に収容する。
【0014】
以下、図面を引用して実施例により本発明を詳細に説明する。
図1は、本発明の組織採取針を利用した洗浄吸引採卵装置の概念図を示し、図2は該組織採取針の上面図を示し、図3は該組織採取針の断面図を示し、図4は組織採取針を目的部位に穿刺した後の内管の突出と洗浄液の流れを示す図である。
図中、1は組織採取針、2は中空金属外針、3は中空内針、4は分岐コネクター、5は洗浄液注入ライン(ルアコネクター)、6は組織吸引ライン(ルアコネクター)、7は卵子採取試験管、8は吸引器接続ラインを示す。また、9は外針と内管との間の空隙を示す。空隙は金属外針基端部の分岐コネクターにより中空金属外針および中空内管の軸方向から側方に開放された液注入ルートおよび前記外針刃面より内側に開口部を有し、かつ、外針針基の分岐コネクターの内部を通過する組織吸引ルートを形成する。
【0015】
実施例1
図1〜4に示されるように、ステンレス(SUS304)である中空外針1(外径1.6mm、内径1.4mm、長さ350mm)に、ポリウレタン製中空内管2(外径1.1mm、内径0.8mm、長さ370mm(吸水前))を内挿し、先端部外表面には研磨スリットによるエコーガイドを設けた。外針基端部を分岐コネクター3内の洗浄液注入ライン5に接続させ、内管基端部は分岐コネクター3内の組織吸引ライン6へ接続させた。
使用したポリウレタン(サーメディックス社製、テコフレックス)は、約20℃(室温)で湿度50%の環境から約36℃(体温)で湿度100%の環境変化において、含水率が約0.4%から1.5%へ変化し、さらに、その長さが0.5%伸長する材料である。したがって、吸水前に370mmであった内管は、吸水後には372mmに伸長して、上記外針の先端から2mm突出する(図4参照)。
上記組織採取針を膣から卵巣へ穿刺し、上記エコーガイドへ体外から超音波を送信して、目的部位に組織針が到達したことを確認してから、外針先端の刃先を卵巣の卵胞へ穿刺し、次いで、シリンジから洗浄液ラインを経由して洗浄水を送水すると同時に、伸長した内管の突出部から洗浄液とともに卵子を吸引器接続ラインにて吸引して、卵子を卵採取試験管内に収容する。
【0016】
実施例2
実施例1と同様にして、ポリウレタン製組織採取針を製造した。ただし、使用したポリウレタン(サーメディックス社製、テコフィリック)は、約20℃(室温)で湿度50%の環境から約36℃(体温)で湿度100%の環境変化において、含水率が約0.4%から5.0%へ変化し、さらに、その長さは1.0%伸長する材料である。したがって、吸水前に370mmであった内管は、吸水後には374mmに伸長して、上記外針の先端から4mm突出する。
【0017】
実施例3
図1と同様なステンレス(SUS304)である中空外針1(外径1.6mm、内径1.4mm、長さ350mm)に、形状記憶合金(日本精線製、Ni-Ti合金リメンバロイ、AF点25〜37℃付近設定)から作製した(Ni-Ti)形状記録合金製中空内管2(外径1.1mm、内径0.8mm、長さ372mm)を予め湾曲させ、370mmの全長になるよう変形させた上で内挿し、先端部外表面にはサンドブラストによるエコーガイドを設けた。外針基端部を分岐コネクター3内の洗浄液注入ライン5に接続させ、内管基端部は分岐コネクター3内の組織吸引ライン6へ接続させた。穿刺前の組織採取針の断面を図5に示す。穿刺前の組織採取針の断面図を図5に示す。従って、加温前(約20℃)に370mmであった内管は、加温後(約36℃)には372mmに伸長して、上記外針の先端から2mm突出する。
上記組織採取針を膣から卵巣へ穿刺し、上記エコーガイドへ体外から超音波を送信して、目的部位に組織針が到達したことを確認してから、外針先端の刃先を卵巣の卵胞へ穿刺し、次いで、シリンジから洗浄液ラインを経由して洗浄水を送水すると同時に、伸長した内管の突出部から洗浄液とともに卵子を吸引器接続ラインにて吸引して、卵子を卵採取試験管内に収容する。
【0018】
【発明の効果】
本発明では、金属外針と内管を二重構造とし、内管を水分あるいは温度の変化により寸法変形する材料を採用することにより、卵巣へ組織採取針を穿刺した後、洗浄液を該内管が水分を吸収して変形し、かつ伸長して、穿刺した金属外針の刃面から突出した内管から組織を吸引することにより、洗浄口と組織吸引口の位置が離れて、洗浄液を直接に吸引することを防ぐことが可能となる。
【図面の簡単な説明】
【図1】本発明の組織採取針を利用した洗浄吸引採卵装置の概念図である。
【図2】本発明の組織採取針の上面図である。
【図3】本発明の組織採取針の断面図である。
【図4】穿刺後の内管の突出と洗浄液の流れを示す図である。
【図5】内管が形状記憶合金である組織採取針の穿刺前の断面図である。
[0001]
[Technical field to which the invention belongs]
The present invention relates to a needle for collecting human and animal tissues, and more particularly to a tissue collecting needle used for aspirating and collecting eggs from ovaries in humans and animals for in vitro fertilization and microinsemination. .
[0002]
[Prior art]
When collecting an egg from a human or animal ovary, generally, a tissue collection needle is set on a transvaginal ultrasound probe, a tissue collection needle is punctured from the vagina under ultrasound echo, and tissue is collected in the ovary. Let the needle reach. A washing solution is injected into the ovary, and the follicle in the ovary is aspirated to collect the ovum. In the tissue collection needle, an echo guide that reflects ultrasonic waves is provided at the tip of the tissue collection needle. Such tissue collection needles include a single needle ultrasonic tissue collection needle that is punctured into the ovary, injecting a cleaning solution with a syringe, and then repeatedly collecting an egg with another syringe. However, this method takes time for the collection of the ovum and the ovum collection rate is low because the blade tip shakes, the cleaning liquid flows backward or leaks during the operation of replacing one syringe with another. And had the disadvantages. Later, a double-lumen tissue collection needle with two lumens was developed. The surgeon punctures the ovary to check the follicular ovum, and the assistant injects the cleaning solution with a syringe while simultaneously using the suction device. It became possible to do. In such a method using a tissue sampling needle having two lumens, the egg collection time and the egg collection rate can be improved.
[0003]
[Problems to be solved by the invention]
However, in the conventional double lumen needle, the cleaning liquid injection port and the egg suction port are on the same blade surface or inside the blade surface, so that a sufficient amount of cleaning liquid is not injected when cleaning and suction are performed simultaneously. Then, all of the cleaning solution was aspirated before being injected into the follicle, and the assistant had to inject the cleaning solution vigorously.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present inventors have made extensive studies. As a result, the metal outer needle and the inner tube have a double structure, and the inner tube has a change in moisture (conditions in which cleaning fluid and body fluid exist from normal humidity conditions). Change in temperature) and / or by changing the temperature (from room temperature to body temperature), the inner tube absorbs moisture from the washing solution after the tissue collection needle is punctured into the ovary, or the temperature As the tissue is sucked from the inner tube protruding from the blade surface of the punctured metal outer needle that is deformed and stretched due to the change, the position of the cleaning liquid inlet and the tissue suction port are separated, and the cleaning liquid is directly sucked The inventors have found that this can be prevented and have reached the present invention.
[0005]
Specifically, the present invention provides a hollow metal outer needle having a cutting edge provided at the tip, a hollow inner tube built in the outer needle, and a branch provided with means for fixing the outer needle and the proximal end of the inner tube, respectively. A tissue sampling needle comprising a connector, wherein the inner tube extends and the tip of the inner tube protrudes forward from the outer needle blade surface.
[0006]
Further, the present invention provides a hollow metal outer needle having a cutting edge provided at the tip, a hollow inner tube built in the outer needle, and a branch provided with means for fixing the outer needle and the proximal end of the inner tube, respectively. A gap is formed between the hollow metal outer needle and the hollow inner tube, and the gap is axially formed by the branch connector at the base end portion of the metal outer needle and the hollow metal outer needle and the hollow inner tube. Forming a tissue suction route that has a liquid injection route that is opened laterally from the side and an opening inside the outer needle blade surface and that passes through the inside of the branch connector of the outer needle base, and the inner tube By extending, the tip of the inner tube protrudes forward from the outer needle blade surface.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
The tissue collection needle in the present invention is a hollow metal outer needle provided with a cutting edge at the tip, a hollow inner tube built in the outer needle, and means for fixing the outer needle and the proximal end portion of the inner tube, respectively. It consists of a branch connector equipped with.
The hollow metal outer needle is a tubular body having an outer shape communicating with the inside, and a cutting edge is provided at a tip portion thereof. The blade edge shape is usually a blade surface with a sharp tip. The outer diameter, inner diameter and length are not particularly limited, but usually the outer diameter is 0.5 to 2.5 mm, preferably 1.4 to 1.8 mm, and the inner diameter is 0.3 to 2.2 mm, preferably Is 1.0 to 1.6 mm, and the length is usually 50 to 450 mm, preferably 200 to 400 mm. These outer diameter, inner diameter, and length are appropriately selected according to the purpose of use.
Examples of the metal include stainless steel, titanium, nickel titanium alloy and the like. It is preferable that an echo guide that reflects ultrasonic echoes is provided at the tip of the outer needle.
[0008]
The inner tube in the present invention is a hollow inner tube built in the outer needle. As for the length of the inner tube and the outer needle, it is essential that the former is the same as or shorter than the latter before use. The outer needle and the proximal end of the inner tube are connected to a branch connector provided with means for fixing each of them. A gap is formed between the hollow metal outer needle and the hollow inner tube, and the gap is opened laterally from the axial direction of the hollow metal outer needle and the hollow inner tube by a branch connector at the base end of the metal outer needle. A tissue suction route that has an opening on the inner side of the liquid injection route and the outer needle blade surface and passes through the inside of the branch connector of the outer needle needle base is formed.
In the present invention, when the inner tube extends, the inner tube tip protrudes forward from the outer needle blade surface.
[0009]
The hollow inner tube is made of a material that expands due to a change in moisture or temperature. Such materials include water-absorbing synthetic resins or shape memory alloys. Examples of the water absorbent resin include water absorbent resins such as polyurethane, nylon, ethylene / vinyl acetate copolymer (EVA), polyvinyl alcohol (PVA), and ethylene / vinyl alcohol copolymer (EVOH). Examples of shape memory alloys include alloys such as Ni—Ti, Ni—Ti—Co, In—Tl, Fe—Mn, and Fe—Ni—Ti—Co.
Among these materials, as the water-absorbing resin, specifically, in a change in the environment where the humidity is 50% at room temperature (about 20 ° C.) and the environment where the humidity is 100% at body temperature (about 36 ° C.), 0.1% Resins that produce ~ 30% shape change are preferred. Here, it is presumed that the moisture content of the material changes from 0.5% to 40% in such changes in temperature and humidity. As another material, a shape memory alloy having an AF point (austenite reverse end transformation point) set around 37 ° C. is preferable.
Furthermore, the inner tube of the present invention may have a structure in which a tube formed from a water-absorbing synthetic resin or a shape memory alloy and a metal tube are connected. Moreover, you may have the structure which connected the pipe | tube formed from the water-absorbing synthetic resin or the shape memory alloy, and the pipe | tube formed from other synthetic resins. The tip portion is preferably a resin that causes a shape change.
[0010]
The branch connector in the present invention is to fix the proximal end portion of the outer needle and the proximal end portion of the inner tube inserted in the outer needle. Such a branch connector is formed with the following cleaning liquid injection route and tissue suction route.
[0011]
A gap is formed between the hollow metal outer needle and the hollow inner tube. The gap has a liquid injection route opened laterally from the axial direction of the hollow metal outer needle and the hollow inner tube by a branch connector at the base end portion of the metal outer needle, and an opening inside the outer needle blade surface, and The tissue suction route passing through the inside of the branch connector of the outer needle needle base is formed.
[0012]
A luer connector of a cleaning line tube for injecting the cleaning liquid is connected to the liquid injection route. The tissue suction route is connected to a luer connector of a suction line tube to which a test tube for storing the collected tissue is connected.
In the washing operation, the syringe is filled with heparinized saline or culture solution, and is injected as a washing solution directly from the luer connector or through an extension tube. In the suction operation, a suction device is connected to a connected suction line with a test tube, and tissue is collected in the test tube by intermittently sucking air to a negative pressure.
[0013]
In using the tissue collection needle of the present invention, first, the collection needle is transported to the ovary via the vagina, and the tip of the hollow metal outer needle blade surface is punctured at the target site. Next, the inner tube shape is changed by a change in moisture or temperature, and the inner tube tip is extended forward from the outer needle tip. Next, or at the same time, cleaning water is fed from the gap between the outer needle and the inner needle via the liquid injection route. The egg is sucked from the opening of the inner tube together with the cleaning solution, and is stored in a predetermined container through the tissue collection route.
[0014]
Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a conceptual diagram of a washing / sucking egg collection device using the tissue collection needle of the present invention, FIG. 2 shows a top view of the tissue collection needle, FIG. 3 shows a cross-sectional view of the tissue collection needle, 4 is a diagram showing the protrusion of the inner tube and the flow of the cleaning liquid after the tissue collection needle is punctured into the target site.
In the figure, 1 is a tissue sampling needle, 2 is a hollow metal outer needle, 3 is a hollow inner needle, 4 is a branch connector, 5 is a washing liquid injection line (luer connector), 6 is a tissue suction line (luer connector), and 7 is an egg. Sampling test tube, 8 indicates a suction device connection line. Reference numeral 9 denotes a gap between the outer needle and the inner tube. The gap has a liquid injection route opened laterally from the axial direction of the hollow metal outer needle and the hollow inner tube by a branch connector at the base end portion of the metal outer needle, and an opening inside the outer needle blade surface, and A tissue suction route that passes through the inside of the branch connector of the outer needle base is formed.
[0015]
Example 1
1-4, a hollow outer needle 1 (outer diameter 1.6 mm, inner diameter 1.4 mm, length 350 mm) made of stainless steel (SUS304) is connected to a polyurethane hollow inner tube 2 (outer diameter 1.1 mm). , An inner diameter of 0.8 mm and a length of 370 mm (before water absorption) was inserted, and an echo guide by a polishing slit was provided on the outer surface of the tip. The proximal end portion of the outer needle was connected to the cleaning liquid injection line 5 in the branch connector 3, and the proximal end portion of the inner tube was connected to the tissue suction line 6 in the branch connector 3.
The polyurethane used (Thermedex, Tecoflex) has a moisture content of about 0.4% in an environment change of about 20 ° C. (room temperature) and a humidity of 50% to about 36 ° C. (body temperature) and a humidity of 100%. It is a material which changes from 1.5 to 1.5% and further extends its length by 0.5%. Therefore, the inner tube, which was 370 mm before water absorption, extends to 372 mm after water absorption and protrudes 2 mm from the tip of the outer needle (see FIG. 4).
The tissue collection needle is punctured from the vagina into the ovary, ultrasonic waves are transmitted from outside the body to the echo guide, and it is confirmed that the tissue needle has reached the target site, and then the tip of the outer needle is moved to the ovarian follicle. After puncturing, the cleaning water is sent from the syringe via the cleaning liquid line, and at the same time, the egg is sucked from the protruding portion of the extended inner tube together with the cleaning liquid through the suction device connection line, and the egg is accommodated in the egg collection test tube. To do.
[0016]
Example 2
A polyurethane tissue sampling needle was produced in the same manner as in Example 1. However, the polyurethane used (Themedix, manufactured by Thermedix, Inc.) has a water content of about 0.000 in an environmental change of about 20 ° C. (room temperature) and a humidity of 50% to about 36 ° C. (body temperature) and a humidity of 100%. It is a material that varies from 4% to 5.0%, and that its length is extended by 1.0%. Therefore, the inner tube which was 370 mm before water absorption extends to 374 mm after water absorption and protrudes 4 mm from the tip of the outer needle.
[0017]
Example 3
A hollow outer needle 1 (outer diameter 1.6 mm, inner diameter 1.4 mm, length 350 mm), which is the same stainless steel (SUS304) as in FIG. 1, and shape memory alloy (Nihon Seisen, Ni-Ti alloy rememberloy, AF point) (Ni-Ti) shape recording alloy hollow inner tube 2 (outer diameter 1.1 mm, inner diameter 0.8 mm, length 372 mm) prepared in advance so as to have a total length of 370 mm It was inserted after being deformed, and an echo guide by sandblasting was provided on the outer surface of the tip. The proximal end portion of the outer needle was connected to the cleaning liquid injection line 5 in the branch connector 3, and the proximal end portion of the inner tube was connected to the tissue suction line 6 in the branch connector 3. A cross section of the tissue collection needle before puncturing is shown in FIG. A cross-sectional view of the tissue collection needle before puncturing is shown in FIG. Therefore, the inner tube, which was 370 mm before heating (about 20 ° C.), expands to 372 mm after heating (about 36 ° C.) and protrudes 2 mm from the tip of the outer needle.
The tissue collection needle is punctured from the vagina into the ovary, ultrasonic waves are transmitted from outside the body to the echo guide, and it is confirmed that the tissue needle has reached the target site, and then the tip of the outer needle is moved to the ovarian follicle. After puncturing, the cleaning water is sent from the syringe via the cleaning liquid line, and at the same time, the egg is sucked from the protruding portion of the extended inner tube together with the cleaning liquid through the suction device connection line, and the egg is accommodated in the egg collection test tube. To do.
[0018]
【The invention's effect】
In the present invention, the metal outer needle and the inner tube have a double structure, and the inner tube is made of a material whose dimensions are deformed by changes in moisture or temperature. Absorbs moisture, deforms and stretches, and sucks the tissue from the inner tube protruding from the blade surface of the punctured metal outer needle. It is possible to prevent suction.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram of a washing / sucking egg collection apparatus using a tissue collection needle of the present invention.
FIG. 2 is a top view of the tissue collection needle of the present invention.
FIG. 3 is a cross-sectional view of the tissue sampling needle of the present invention.
FIG. 4 is a diagram showing the protrusion of the inner tube and the flow of cleaning liquid after puncturing.
FIG. 5 is a cross-sectional view of a tissue sampling needle whose inner tube is a shape memory alloy before puncturing.

Claims (3)

先端に刃先が設けられた中空金属外針と、該中空金属外針に内装された中空内管と、該中空金属外針および該中空内管の基端部をそれぞれ固定する手段を備えた分岐コネクターとからなり、
中空金属外針の基端部および該中空内管の基端部が分岐コネクターに固定されることにより、前記中空金属外針と前記中空内管との間に空隙が形成され、
分岐コネクターの内側であって、金属外針基端部よりも基端方向に形成され、中空内管の軸方向から側方に開放された空間である液注入ルートを形成し、
前記外針刃面より内側に開口部を有し外針針基である分岐コネクターの内部を通過する組織吸引ルートを形成し、
前記中空金属外針の先端にはエコーガイドが設けられ
前記中空内管は、水分または温度の変化により伸長する材料により形成され、
前記内管が伸長することにより内管先端部が該外針刃面より前方に突出する
ことを特徴とする組織採取針。
Branch comprising a hollow metallic outer needle cutting edge at an end thereof, a hollow tube which is furnished to the hollow metal outer needle, the means for fixing each of the base end portion of the hollow metal outer needle and said hollow tube Consisting of connectors,
By proximal end of the hollow metal outer needle proximal and hollow inner tube is fixed to the branch connector, a gap is formed between the hollow tube and the hollow metal outer needle,
Inside the branch connector, formed in the proximal direction from the proximal end of the metal outer needle, forming a liquid injection route that is a space opened laterally from the axial direction of the hollow inner tube,
Has an opening on the inner side than the outer needle blade surface to form a tissue suction route that passes through the inside of the branch connector is an outer needle hub,
An echo guide is provided at the tip of the hollow metal outer needle ,
The hollow inner tube is formed of a material that expands due to a change in moisture or temperature,
A tissue sampling needle, wherein the inner tube tip portion projects forward from the outer needle blade surface when the inner tube extends.
前記材料は、吸水性合成樹脂または形状記憶合金である、請求項1記載の組織採取針。The tissue sampling needle according to claim 1, wherein the material is a water-absorbing synthetic resin or a shape memory alloy. 前記吸水性合成樹脂が、室温(約20℃)で湿度50%の環境から、体温(約36℃)で湿度100%の環境の変化において、0.1〜30%の形状変化をもたらす樹脂であることを特徴とする請求項2記載の組織採取針。  The water-absorbing synthetic resin is a resin that causes a shape change of 0.1 to 30% in a change in environment of 50% humidity at room temperature (about 20 ° C.) to 100% humidity at body temperature (about 36 ° C.). The tissue sampling needle according to claim 2, wherein the tissue sampling needle is provided.
JP2001331311A 2001-10-29 2001-10-29 Tissue sampling needle Expired - Lifetime JP3829318B2 (en)

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JP5074803B2 (en) 2007-03-30 2012-11-14 ニプロ株式会社 Echo-contrastable metal needle
JP4946687B2 (en) * 2007-07-18 2012-06-06 富士通株式会社 Microinjection apparatus and fluid injection method
GB0719037D0 (en) 2007-09-28 2007-11-07 Vitrolife Sweden Ab Sampling needle
FR2932977B1 (en) * 2008-06-30 2012-02-10 Imv Technologies INTRA-UTERIN TRANSFER INSTRUMENT THROUGH THE VAGINO-UTERINE NATURAL PATH
JP6050837B2 (en) 2013-01-25 2016-12-21 株式会社北里メディカル Biological cell collection needle
JP7503319B2 (en) * 2018-05-29 2024-06-20 グリーニング インベストメンツ プロプライアタリー リミティド A needle for collecting human eggs
KR102709338B1 (en) * 2018-08-06 2024-09-25 이태이 초워스 Multi-lumen syringe for intraocular injections
CN114711908B (en) * 2022-03-11 2023-05-26 四川大学华西医院 Puncture kit for uterine abdominal wall suspension

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