JP3447215B2 - Chemical injection port - Google Patents
Chemical injection portInfo
- Publication number
- JP3447215B2 JP3447215B2 JP06918098A JP6918098A JP3447215B2 JP 3447215 B2 JP3447215 B2 JP 3447215B2 JP 06918098 A JP06918098 A JP 06918098A JP 6918098 A JP6918098 A JP 6918098A JP 3447215 B2 JP3447215 B2 JP 3447215B2
- Authority
- JP
- Japan
- Prior art keywords
- elastic body
- injection port
- chemical
- internal space
- chemical solution
- 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.)
- Expired - Lifetime
Links
Landscapes
- Media Introduction/Drainage Providing Device (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、進行癌患者の化学
療法における抗癌剤の動脈内注入、栄養補給のための静
脈注入、鎮痛のための髄硬膜等への鎮痛剤の投与、糖尿
病患者へのインシュリン投与等の如く、患者の体内の特
定箇所に長期間継続して、定期的に薬液を注入するため
の、皮下埋め込み可能な薬液注入システムに関するもの
である。
【０００２】
【従来の技術】切除不能な悪性腫瘍に対しては、抗癌剤
投与による化学療法が行われているが、全身投与法では
副作用を生じるため、選択的投与法としてカテーテル先
端を腫瘍局所へ通じる動脈上流に留置し、端末を抗癌剤
注入口として体外に露出させたままにするか、或は抗癌
剤投与の都度カテーテルを再挿入していた。（動注化学
療法）また、高カロリー輸液の持続注入の場合にも、カ
テーテル先端を中心静脈内に留置し、端末を輸液注入口
として体外に露出させていた。（ＩＶＨ）
【０００３】このためカテーテルを挿入した皮膚創部か
らの感染の防止は懸案課題であるが、一方皮膚創部を常
に清潔に保つことは実生活上は極めて困難であり、かつ
患者の自由な行動や入浴等にも制約があり、社会復帰に
大きな妨げとなっていた。このような問題の解決手段と
して、体内に長期間留置した状態で使用可能な皮下埋込
型のカテーテル組立体が開発されている。このカテーテ
ル組立体とは薬液を貯留するための内部空間と、この内
部空間に連通する円柱形の弾性体を圧縮装着した薬液注
入口、およびコネクターが付設された薬液流出路を有す
るポート本体と、薬液注入用のルーメンが形成されたカ
テーテルとを、前記流出路にルーメンが連通するように
前記コネクターにカテーテルを接続したものである。
【０００４】本皮下埋込型カテーテル組立体は、カテー
テルを目的の血管内等まで挿入し、薬液注入ポートを皮
下組織に固定した状態で留置される。そして、薬液を注
入する際は、皮膚の上から触診により薬液注入ポートの
薬液注入口を確認し、薬液注入口の弾性体を注射針にて
穿刺することにより薬液をポート本体内に送り込み、カ
テーテルを介して目的の血管内等へ薬液を注入する。
【０００５】薬液注入ポートは前述のように皮下に埋設
された弾性体に盲目的に注射針が穿刺されるため、より
穿刺部径が広いものが求められている。しかしながら従
来の薬液注入ポートの穿刺部径について述べると、図４
に示すように円柱形の弾性体を上部より圧縮保持する構
造となっているため穿刺部径の大きさは薬液注入ポート
の本体頂部径よりも少なくとも５ｍｍ程度小さくなる設
計となっており（本体頂部径−穿刺部径≧５ｍｍ）、広
さに限界があるばかりでなく、ポート本体頂部の弾性体
保持部に誤って注射針を穿刺してしまい注射針の先端を
傷つけることがしばしばあった。
【０００６】
【発明が解決しようとする課題】本発明は、従来のこの
ような問題点を解消することを目的とするもので、ポー
ト本体頂部径に穿刺部径がほぼ一致するため従来品より
も広い穿刺部面積を確保でき安全に注射針を穿刺できる
安全な薬液注入ポートを提供するものである。
【０００７】
【課題を解決するための手段】即ち本発明は、薬液を貯
留するための内部空間と、この内部空間に連通する薬液
注入口と、この薬液注入口を封止する弾性体と、前記内
部空間に連通する薬液流出路とを有し、該薬液流出路先
にコネクターを備えた薬液注入ポートであって、前記弾
性体設置部（弾性体が圧縮保持されるスペース）が下側
に向かって拡径化される形状であり、弾性体側壁面への
圧縮保持力により弾性体が弾性体設置部形状に圧縮固定
されていることを特徴とする薬液注入ポートである。
【０００８】
【発明の実施の形態】以下、図面をもとに本発明につい
て詳細に説明する。図１は本発明による薬液注入ポート
の一実施例を示す図で、図２は本発明による薬液注入ポ
ートの他の実施例を示す（弾性体削除）図で、図３は本
発明による薬液注入ポートに使用する弾性体を示す側面
図である。
【０００９】図１の如く本発明の薬液注入ポート（１）
は薬液を貯留するための内部空間（４）を有し、この上
部に弾性体（３）を装着した薬液注入口（２）を有し、
更に一半径方向に薬液流出路（５）が設けてありその先
にカテーテルを接続するためのコネクター（６）が付設
されている。薬液注入ポート（１）の本体を形成する上
部の弾性体（３）の設置部（８）は下方向に向かって１
５〜７５゜の角度のテーパー状に拡径化されており、本
形状により弾性体（３）が圧縮保持されている。このテ
ーパー角度は１５゜以下では弾性体（３）が薬液等の注
入圧力により脱落する恐れがあり、逆に７５゜以上では
ポート本体がもともと円錐台形状に設計されているため
スペースを確保できない等の理由により設定されたもの
であり、更に３０〜６０゜の範囲にあることがより好ま
しい。
【００１０】また弾性体設置部（８）の形状の他の実施
例として図２に示すように、曲面テーパー状等、下方が
上方に比較し拡径化されていれば同様の効果が得られる
ことは言うまでもない。薬液注入ポート（１）の本体材
質としては、生体内に長期留置することより生体適合性
に優れていることが必要で、しかも熱変形温度が体温の
約２倍である７０℃以上であることが望ましく例えばポ
リウレタン、ポリエーテルスルフォン、シリコーンゴム
等の樹脂やステンレス、チタニウム等の金属、或いはこ
れらの組合せでも何ら構わない。
【００１１】また、弾性体（３）は図３の（ａ）、
（ｂ）に示すようにポート本体の弾性体設置部（８）の
形状に合わせた円錐台形状や、円錐台と円柱との組み合
わせ形状であることが組立作業性が容易となり好ましい
が、前記スペースに圧入することにより実用上、十分な
保持力（耐圧）が得られる形状であれば使用可能であ
る。弾性体（３）の材質としては、自己封止性を有する
弾性状物質であり、例えばシリコーン、イソプレーン、
ラテックス等のゴムが考えられるが軟質の塩化ビニルや
ポリウレタン樹脂でも針刺し耐久性および生体適合性に
優れていれば使用可能である。更にコネクター（６）の
材質としては、強度的にステンレスやチタニウム等の金
属が望ましいが限定されるものではない。薬液注入ポー
ト（１）は以上の構成部品をインサート成形や接着及び
溶着等により組み立てられる。
【００１２】次に、本発明の薬液注入ポート（１）と従
来品との穿刺部径の比較を図１、４の側断面図を用いて
説明すると、仮に薬液注入ポート本体の外寸形状を同じ
に設計された場合、図４の従来品では弾性体保持部
（７）が弾性体外周の上側に必要となる分、穿刺部径が
小さくなることが一目瞭然である。次に使用方法につい
て述べる。薬液注入ポート（１）は皮下脂肪層と筋膜層
の間に埋め込まれ、皮膚の上から触診により薬液注入口
（２）を確認し、薬液注入口（２）の弾性体（３）を注
射針にて穿刺することにより薬液をポート本体内に送り
込み、接続カテーテルを介して目的の血管内等へ薬液を
注入する。
【００１３】
【発明の効果】以上に述べた如く、本発明による薬液注
入ポートは、穿刺部径が大きいため針刺しミスを減らす
ことができ、より安全に選択的薬液注入が行える用具と
して極めて有用である。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intraarterial infusion of an anticancer drug in chemotherapy for advanced cancer patients, an intravenous infusion for nutritional supplementation, a dura mater for analgesia and the like. The present invention relates to a subcutaneously implantable drug solution injection system for continuously and periodically injecting a drug solution into a specific part of a patient's body for a long period of time, such as administration of an analgesic to a patient or administration of insulin to a diabetic patient. is there. [0002] For unresectable malignant tumors, chemotherapy using anticancer drugs has been performed. However, systemic administration causes side effects. The indwelling device was placed upstream of the communicating artery, and the terminal was left exposed outside the body as an anticancer drug injection port, or the catheter was reinserted each time the anticancer drug was administered. (Arterial infusion chemotherapy) Also, in the case of continuous infusion of high-calorie infusion, the catheter tip was placed in the central vein and the terminal was exposed outside the body as an infusion inlet. (IVH) [0003] For this reason, prevention of infection from the skin wound where a catheter is inserted is a matter of concern, however, it is extremely difficult in real life to keep the skin wound clean at all times, and the patient is free. There were also restrictions on behavior and bathing, which greatly hindered rehabilitation. As a solution to such a problem, a subcutaneously implantable catheter assembly that can be used while being left in the body for a long time has been developed. The catheter assembly has an internal space for storing a drug solution, a drug solution inlet compressed and mounted with a cylindrical elastic body communicating with the internal space, and a port body having a drug solution outflow passage provided with a connector, A catheter provided with a lumen for injecting a drug solution, and a catheter connected to the connector such that the lumen communicates with the outflow channel. The subcutaneous implantable catheter assembly is placed in a state where a catheter is inserted into a target blood vessel or the like and a drug solution injection port is fixed to a subcutaneous tissue. Then, when injecting the drug solution, the drug solution inlet port of the drug solution injection port is confirmed by palpation from above the skin, and the drug solution is sent into the port body by puncturing the elastic body of the drug solution inlet port with a syringe needle. A drug solution is injected into a target blood vessel or the like via the. [0005] As described above, since the injection needle is blindly punctured into the elastic body buried under the skin as described above, a port having a larger puncture portion is required. However, regarding the diameter of the puncture portion of the conventional chemical injection port, FIG.
As shown in the figure, since the cylindrical elastic body is configured to be compressed and held from above, the diameter of the puncturing portion is designed to be at least about 5 mm smaller than the diameter of the top of the main body of the liquid injection port (the top of the main body). (Diameter−puncturing part diameter ≧ 5 mm), and there is a limit to the width, and the needle is punctured by mistake into the elastic body holding part at the top of the port body, often damaging the tip of the needle. SUMMARY OF THE INVENTION An object of the present invention is to solve such a conventional problem, and the diameter of the puncturing portion is substantially equal to the diameter of the top portion of the port body. Another object of the present invention is to provide a safe liquid injection port that can secure a large puncture area and can puncture an injection needle safely. That is, the present invention provides an internal space for storing a chemical liquid, a chemical liquid inlet communicating with the internal space, and an elastic body for sealing the chemical liquid inlet. A liquid injection port having a chemical liquid outflow passage communicating with the internal space, and a connector provided at a tip of the chemical liquid outflow path, wherein the elastic member installation portion (space in which the elastic member is compressed and held) is located on a lower side. The chemical liquid injection port has a shape whose diameter is increased toward the front, and wherein the elastic body is compression-fixed in the shape of the elastic body installation portion by a compressive holding force on the side wall surface of the elastic body. Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a view showing one embodiment of a chemical injection port according to the present invention, FIG. 2 is a view showing another embodiment of the chemical injection port according to the present invention (elimination of an elastic body), and FIG. 3 is a chemical injection according to the present invention. It is a side view which shows the elastic body used for a port. As shown in FIG. 1, the liquid injection port (1) of the present invention.
Has an internal space (4) for storing a chemical solution, and has a chemical solution inlet (2) on which an elastic body (3) is mounted,
Further, a drug solution outflow path (5) is provided in one radial direction, and a connector (6) for connecting a catheter is provided at the tip thereof. The installation part (8) of the upper elastic body (3) that forms the main body of the chemical liquid injection port (1) has a downward
The diameter is increased in a taper shape at an angle of 5 to 75 °, and the elastic body (3) is compressed and held by this shape. If the taper angle is less than 15 °, the elastic body (3) may fall off due to the injection pressure of a chemical solution or the like. Conversely, if the taper angle is more than 75 °, space cannot be secured because the port body is originally designed to have a truncated cone shape. Is set for the reason described above, and more preferably in the range of 30 to 60 °. As another embodiment of the shape of the elastic body installation portion (8), as shown in FIG. 2, a similar effect can be obtained if the diameter of the lower portion is made larger than that of the upper portion, such as a curved tapered shape. Needless to say. The body material of the liquid injection port (1) must be superior in biocompatibility to long-term indwelling in a living body, and the heat deformation temperature must be 70 ° C. or more, which is about twice the body temperature. Desirably, for example, a resin such as polyurethane, polyethersulfone, or silicone rubber, a metal such as stainless steel or titanium, or a combination thereof may be used. The elastic body (3) is shown in FIG.
As shown in (b), it is preferable that the shape is a truncated cone that matches the shape of the elastic body installation portion (8) of the port body, or that the shape is a combination of a truncated cone and a cylinder because it facilitates assembly workability. Any shape can be used as long as it has a practically sufficient holding force (pressure resistance) by being press-fitted into the hole. The material of the elastic body (3) is an elastic substance having a self-sealing property, for example, silicone, isoprene,
Rubber such as latex is conceivable, but soft vinyl chloride or polyurethane resin can be used if it has excellent needle sticking durability and biocompatibility. Further, the material of the connector (6) is preferably a metal such as stainless steel or titanium from the viewpoint of strength, but is not limited. The chemical injection port (1) is assembled by insert molding, bonding and welding of the above components. Next, a comparison of the puncture part diameter of the liquid injection port (1) of the present invention with the conventional product will be described with reference to the side sectional views of FIGS. In the case of the same design, it is obvious at a glance that the diameter of the puncture part is reduced by the amount required for the elastic body holding part (7) above the outer periphery of the elastic body in the conventional product of FIG. Next, the method of use will be described. The drug solution injection port (1) is embedded between the subcutaneous fat layer and the fascia layer, the drug solution inlet (2) is confirmed by palpation from above the skin, and the elastic body (3) of the drug solution inlet (2) is injected. The drug solution is sent into the port body by puncturing with a needle, and the drug solution is injected into a target blood vessel or the like via the connection catheter. As described above, the drug solution injection port according to the present invention has a large puncture portion diameter, so that needle puncture errors can be reduced, and it is extremely useful as a tool for more safely performing selective drug solution injection. is there.
【図面の簡単な説明】
【図１】本発明の一実施例となる薬液注入ポートを示す
側断面図である。
【図２】本発明の他の実施例となる薬液注入ポート（弾
性体削除）を示す側断面図である。
【図３】本発明の実施例となる薬液注入ポートの２種類
の弾性体を示す側面図である。
【図４】従来の薬液注入ポートを示す側断面図である。
【符号の説明】
１ 薬液注入ポート
２ 薬液注入口
３ 弾性体
４ 内部空間
５ 薬液流出路
６ コネクター
７ 弾性体保持部
８ 弾性体設置部BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view showing a chemical injection port according to an embodiment of the present invention. FIG. 2 is a side sectional view showing a chemical liquid injection port (an elastic body is omitted) according to another embodiment of the present invention. FIG. 3 is a side view showing two types of elastic bodies of a chemical liquid injection port according to an embodiment of the present invention. FIG. 4 is a side sectional view showing a conventional chemical liquid injection port. [Description of Signs] 1 Chemical liquid injection port 2 Chemical liquid inlet 3 Elastic body 4 Internal space 5 Chemical liquid outflow path 6 Connector 7 Elastic body holding part 8 Elastic body installation part
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) A61M 37/00 A61M 31/00 ──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 7 , DB name) A61M 37/00 A61M 31/00
Claims (1)
部空間に連通する薬液注入口と、この薬液注入口を封止
する弾性体と、前記内部空間に連通する薬液流出路とを
有し、該薬液流出路先にコネクターを備えた薬液注入ポ
ートであって、前記弾性体の設置部（弾性体が圧縮保持
されるスペース）が下側に向かって拡径化され、弾性体
側壁面を圧縮する弾性体保持部の内壁面が弾性体の中心
軸線に対して３０〜６０゜のテーパーをなす曲面形状で
あり、弾性体形状が円錐台もしくは円錐台と円柱との組
み合わせによりなり、弾性体側壁面への圧縮保持力によ
り弾性体が弾性体設置部形状に圧縮固定されていること
を特徴とする薬液注入ポート。(57) [Claim 1] An internal space for storing a chemical solution, a chemical liquid inlet communicating with the internal space, an elastic body sealing the chemical liquid inlet, and the internal space. A chemical solution outflow passage communicating with the liquid medicine outflow passage, and a chemical solution injection port provided with a connector at the tip of the chemical solution outflow passage, wherein the installation portion of the elastic body (the space where the elastic body is compressed and held) faces downward. Expanded, elastic body
The inner wall surface of the elastic body holding part that compresses the side wall surface is the center of the elastic body
It is a curved surface having a taper of 30 to 60 degrees with respect to the axis , and the elastic body shape is a truncated cone or a set of a truncated cone and a cylinder.
Liquid injection port becomes the combination seen, the elastic body by the compression retention of the elastic body-side wall surface, characterized in that it is compressed secured to the elastic member installation portion shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06918098A JP3447215B2 (en) | 1998-03-19 | 1998-03-19 | Chemical injection port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06918098A JP3447215B2 (en) | 1998-03-19 | 1998-03-19 | Chemical injection port |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11262534A JPH11262534A (en) | 1999-09-28 |
| JP3447215B2 true JP3447215B2 (en) | 2003-09-16 |
Family
ID=13395277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06918098A Expired - Lifetime JP3447215B2 (en) | 1998-03-19 | 1998-03-19 | Chemical injection port |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3447215B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7762999B2 (en) * | 2006-02-01 | 2010-07-27 | Ethicon Endo-Surgery, Inc. | Injection port |
-
1998
- 1998-03-19 JP JP06918098A patent/JP3447215B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11262534A (en) | 1999-09-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6290677B1 (en) | Medicinal liquid injection port | |
| US6929631B1 (en) | Method and apparatus for percutaneously accessing a pressure activated implanted port | |
| US7524300B2 (en) | Infusion device | |
| EP0551017B1 (en) | Implantable infusion device | |
| JP3682900B2 (en) | Chemical injection port | |
| US20080086100A1 (en) | Vascular access device stagnant fluid displacement | |
| JPH10127777A (en) | Pharmaceutical liquid injecting port | |
| JP3447215B2 (en) | Chemical injection port | |
| US11504516B2 (en) | Port catheter | |
| WO2000044419A9 (en) | Method and apparatus for percutaneously accessing a pressure activated implanted port | |
| JP3169547B2 (en) | Chemical injection port | |
| JP3137360B2 (en) | Chemical injection port | |
| JP3248839B2 (en) | Chemical injection port | |
| JPH1147278A (en) | Medicinal liquid injection port | |
| JP2000005322A (en) | Medical liquid injection port | |
| JPH11155958A (en) | Medicinal liquid injecting port | |
| JPH0576450U (en) | Chemical injection port |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080704 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090704 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100704 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110704 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120704 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130704 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140704 Year of fee payment: 11 |
|
| EXPY | Cancellation because of completion of term |