JP2001054573A - Medical needle and its production - Google Patents
Medical needle and its productionInfo
- Publication number
- JP2001054573A JP2001054573A JP11231490A JP23149099A JP2001054573A JP 2001054573 A JP2001054573 A JP 2001054573A JP 11231490 A JP11231490 A JP 11231490A JP 23149099 A JP23149099 A JP 23149099A JP 2001054573 A JP2001054573 A JP 2001054573A
- Authority
- JP
- Japan
- Prior art keywords
- blade surface
- needle
- medical needle
- weld zone
- filler
- 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.)
- Pending
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 4
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000005498 polishing Methods 0.000 claims abstract description 7
- 239000000945 filler Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 6
- 239000000470 constituent Substances 0.000 claims description 5
- 239000006223 plastic coating Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 1
- 239000003973 paint Substances 0.000 abstract 1
- 210000004204 blood vessel Anatomy 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000004033 plastic Substances 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 201000005299 metal allergy Diseases 0.000 description 2
- 239000002985 plastic film Substances 0.000 description 2
- 229920006255 plastic film Polymers 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 206010020751 Hypersensitivity Diseases 0.000 description 1
- 208000026935 allergic disease Diseases 0.000 description 1
- 230000007815 allergy Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 238000001631 haemodialysis Methods 0.000 description 1
- 230000000322 hemodialysis Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は血管に穿刺しても被
穿刺者に苦痛を与えない採血針、注射針等の医療用針の
改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in medical needles such as blood collection needles and injection needles which do not cause pain to a punctured person even when puncturing a blood vessel.
【０００２】[0002]
【従来技術及び発明が解決しようとする課題】現在の医
療用針はオーステナイト組織を有するＦｅ−Ｃｒ−Ｎｉ
合金からなるステンレス（ＳＵＳ１８−８）を次のよう
に加工することにより製造される。 （ａ）図３（Ａ）のようにステンレスの板４０を折り曲
げて図３（Ｂ）のようにパイプ４１状にする。 （ｂ）前記パイプ４１の中に芯金４２を入れ、さらにこ
れを加工管４３に通すことにより内外から圧力を加えて
引延ばし、所望の内外径と肉厚となるように加工する。 （ｃ）パイプ４１側部の接触面４４を高温で溶接し、パ
イプ４１を所望の長さに切断する。 （ｄ）前記切断面を図４のように鋭利な刃面５３となる
ように砥石で研磨する。 ところが以上のように製造した医療用針５１の中には刃
面５３の先端５４がやわらかく、患者の血管に穿刺する
時にめくれて切れ味が悪く、患者に苦痛を与えるロット
の混入がどうしてもさけられなかった。これはパイプ４
１側部の接触面４４を高温で溶接する時に構成材料のＦ
ｅ−Ｃｒ−Ｎｉ三成分のオーステナイト組織の成分バラ
ンスに変化が生じ三成分のうち最も硬度のやわらかいＮ
ｉ成分が一箇所にかたまって脆弱部が生成するためと考
えられる。さらに刃面５３の先端５４は最も鋭利で細く
機械的強度が弱い箇所であり、刃面５３を研磨する時に
刃面５３のどこの位置にでも脆弱部を含む前記溶接部５
６が位置する可能性があり、特に脆弱部を含む溶接部５
６が図４のように、刃面５３の先端５４に位置する時は
先端５４は、より一層機械的強度が弱くなるため（やわ
らかくなり）、めくれが生じやすい状態となる。刃面５
３の先端５４は刃面の中でも最も切れ味に影響する部分
であるから、めくれやすい状態の先端５４を患者の血管
に穿刺する時は切れ味が悪く、極端に刺通抵抗が大きく
なるので、患者に大きな苦痛を与えることになる。また
針管５２の構成材料であるＳＵ１８−８に代表されるス
テンレスは生体に長時間接すると生体のアレルギー（腫
れやむくみ）を引き起こす。このため血液透析時に使用
される針は金属の内針とプラスチックの外針（留置針）
より構成され、金属の内針は血管に穿刺後速やかに引き
抜いて、プラスチックの外針のみを血管に留置するよう
にしているが、二重構造の針を使用することは操作上手
間で、コスト高となる。そこで本発明者は以上の課題を
解決するために鋭意検討を重ねた結果次の発明に到達し
た。2. Description of the Related Art Present medical needles are Fe-Cr-Ni having an austenitic structure.
It is manufactured by processing stainless steel (SUS18-8) made of an alloy as follows. (A) A stainless steel plate 40 is bent as shown in FIG. 3A to form a pipe 41 as shown in FIG. 3B. (B) A metal core 42 is put into the pipe 41, and the metal core 42 is passed through a processing pipe 43 to apply pressure from inside and outside to expand the pipe, thereby processing the pipe to a desired inner and outer diameter and wall thickness. (C) The contact surface 44 on the side of the pipe 41 is welded at a high temperature, and the pipe 41 is cut to a desired length. (D) The cut surface is polished with a grindstone so as to form a sharp blade surface 53 as shown in FIG. However, in the medical needle 51 manufactured as described above, the tip 54 of the blade surface 53 is soft and turned up when puncturing a blood vessel of a patient, so that it is hard to cut, and the mixing of a lot that causes pain to the patient cannot be avoided. Was. This is pipe 4
When welding the contact surface 44 on one side at a high temperature, the F
The component balance of the austenitic structure of the three components of e-Cr-Ni changes, and N is the softest of the three components.
It is considered that the i-components are gathered in one place to generate a fragile portion. Further, the tip 54 of the blade surface 53 is the sharpest, thin and weak mechanical strength, and when the blade surface 53 is polished, the welded portion 5 including a fragile portion at any position on the blade surface 53 is provided.
6 may be located, particularly the weld 5
When 6 is located at the distal end 54 of the blade surface 53 as shown in FIG. 4, the distal end 54 has a further lower mechanical strength (softer), and is likely to be turned up. Blade surface 5
Since the tip 54 of 3 is the portion that most affects the sharpness of the blade surface, when the tip 54 in the easily turned state is punctured into a patient's blood vessel, the sharpness is poor and the penetration resistance becomes extremely large. It will cause great pain. Further, stainless steel typified by SU18-8, which is a constituent material of the needle tube 52, causes allergy (swelling and swelling) of the living body when exposed to the living body for a long time. For this reason, the needle used for hemodialysis is a metal inner needle and a plastic outer needle (indwelling needle)
The inner needle made of metal is pulled out immediately after puncturing the blood vessel, and only the outer needle made of plastic is placed in the blood vessel. Will be high. The inventor of the present invention has made intensive studies in order to solve the above-mentioned problems, and has arrived at the following invention.
【０００３】[0003]
【課題を解決するための手段】［１］本発明は、針管２
の溶接部６を刃面の先端４に配置することなく、溶接部
６を刃面の後端５に配置した医療用針１を提供する。 ［２］本発明は、針管１２側部の隙間に充填剤１８を充
填し、充填剤１８を刃面の先端１４に配置することな
く、充填剤１８を刃面の後端１５に配置した医療用針１
１を提供する。 ［３］本発明は、前記充填剤１８を着色した［２］に記
載の医療用針１１を提供する。 ［４］本発明は、少なくとも前記針管２（１２）の外周
にプラスチック被膜７（１７）を形成した［１］ないし
［３］に記載の医療用針１（１１）を提供する。 ［５］本発明は、次の各工程を含む［１］ないし［４］
に記載の医療用針の製造方法を提供する。 （１）医療用針１（１１）のパイプ状の構成材料を所望
の長さに切断する工程、（２）（１）の切断面の溶接部
６（充填剤１８）が刃面３(１３)の後端５（１５）に位
置するように位置決めをしてから刃面３（１３）を研摩
する工程。Means for Solving the Problems [1] The present invention provides a needle tube 2
The medical needle 1 in which the welded portion 6 is disposed at the rear end 5 of the blade surface without disposing the welded portion 6 at the front end 4 of the blade surface. [2] The present invention provides a medical device in which the filler 18 is filled in the gap on the side of the needle tube 12 and the filler 18 is arranged at the rear end 15 of the blade surface without disposing the filler 18 at the tip 14 of the blade surface. Needle 1
Provide 1. [3] The present invention provides the medical needle 11 according to [2], wherein the filler 18 is colored. [4] The present invention provides the medical needle 1 (11) according to [1] to [3], wherein a plastic coating 7 (17) is formed on at least the outer periphery of the needle tube 2 (12). [5] The present invention includes the following steps [1] to [4].
3. A method for producing a medical needle according to the item 1. (1) a step of cutting the pipe-shaped constituent material of the medical needle 1 (11) to a desired length; (2) the welded portion 6 (filler 18) of the cut surface of (1) is cut by the blade surface 3 (13) ) A step of polishing the blade surface 3 (13) after positioning it so as to be located at the rear end 5 (15).
【０００４】[0004]
【発明の実施の形態】図１は本発明の医療用針１の概略
図（（Ａ）は正面図、（Ｂ）は平面図、（Ｃ）は（Ａ）
のＡ−Ａ断面図）で医療用針１は針管２の溶接部６を刃
面の先端４に配置することなく、溶接部６を刃面の後端
５に配置している。前記したように溶接部６は他の非溶
接部と比較して強度は若干劣ることもあるが、刃面３の
切れ味にもっとも影響を与えることが少ない刃面の後端
５に配置され、刃面３の極微小面積を占めるにすぎな
い。他方刃面３の一点の溶接部６を除く他の非溶接部は
安定した均一な強度を保持している。したがって刃面３
を研磨する時は刃面の切れ味をほとんど支配する先端４
及び溶接部６を除く非溶接部を均一に研磨することがで
きる。一点の溶接部６は若干の歪みを伴うこともあるが
刃面の切れ味に影響を及ぼすことはない。以上のように
医療用針１の刃面３は全体的に鋭利な切れ味を確保する
ことができる。図２は本発明の医療用針１１のその他の
実施例を示す概略図（（Ａ）は正面図、（Ｂ）は平面
図、（Ｃ）は（Ａ）のＢ−Ｂ断面図）で、医療用針１１
は前記医療用針１で針管２側部の接触面を溶接する代わ
りに針管１２側部に隙間を設け、この隙間に充填剤１８
を充填しかつ充填剤１８を刃面の先端１４に配置するこ
となく充填剤１８を刃面の後端１５に配置したものであ
る。充填剤１８も針管２の構成材料と比較して強度は劣
る場合もあるが前記医療用針１と同様の理由で医療用針
１１の刃面１３は全体的に鋭利な切れ味を確保すること
ができる。さらに医療用針１１では充填剤１８を着色す
ることにより刃面１３の向き（先端１４の向き）を容易
に知ることができ、穿刺作業を効率良く行うことができ
る。さらに医療用針１（１１）では刃面３（１３）を除
く針管２（１２）の外周に生体適合性の良いプラスチッ
ク被膜７（１７）を形成することにより生体の金属アレ
ルギーを抑制することができ、例えば透析用の留置針の
代替品として使用することができる。1 is a schematic view of a medical needle 1 of the present invention ((A) is a front view, (B) is a plan view, and (C) is (A).
In the medical needle 1, the welded portion 6 of the needle tube 2 is not disposed at the front end 4 of the blade surface, but the welded portion 6 is disposed at the rear end 5 of the blade surface. As described above, the welded portion 6 may be slightly inferior in strength to other non-welded portions, but is disposed at the rear end 5 of the blade surface that has the least influence on the sharpness of the blade surface 3. It occupies only a very small area of surface 3. On the other hand, the non-welded portions other than the welded portion 6 at one point of the blade surface 3 maintain stable and uniform strength. Therefore blade surface 3
Tip 4 that almost controls the sharpness of the blade surface when polishing
In addition, the non-welded portion except the welded portion 6 can be uniformly polished. The single welded portion 6 may be slightly distorted, but does not affect the sharpness of the blade surface. As described above, the blade surface 3 of the medical needle 1 can ensure sharp sharpness as a whole. FIG. 2 is a schematic view showing another embodiment of the medical needle 11 of the present invention ((A) is a front view, (B) is a plan view, and (C) is a BB cross-sectional view of (A)). Medical needle 11
Instead of welding the contact surface on the side of the needle tube 2 with the medical needle 1, a gap is provided on the side of the needle tube 12, and the filler 18
And the filler 18 is arranged at the rear end 15 of the blade surface without disposing the filler 18 at the front end 14 of the blade surface. The filler 18 may have a lower strength than the constituent material of the needle tube 2 in some cases, but for the same reason as the medical needle 1, the blade surface 13 of the medical needle 11 can ensure a sharp sharpness as a whole. it can. Further, by coloring the filler 18 with the medical needle 11, the direction of the blade surface 13 (the direction of the distal end 14) can be easily known, and the puncturing operation can be performed efficiently. Furthermore, in the medical needle 1 (11), a metal coating with good biocompatibility 7 (17) is formed on the outer periphery of the needle tube 2 (12) except for the blade surface 3 (13), thereby suppressing metal allergy in the living body. For example, it can be used as a substitute for an indwelling needle for dialysis.
【０００５】本発明では刃面３（１３）の形状は図示し
たものに限定されず、鋭利な先端４（１４）を有しかつ
溶接部６（充填剤１８）を後端５（１５）に配置した形
状であればどのような形状でも採用することができる。
また針管１２側部の隙間に充填する充填剤１８の充填形
態はとりあえず針管１２側部の隙間が埋まれば良く、図
２（Ｂ）のように針管１２の他の構成材料と同じ厚さと
なるように充填する必要はない。また充填剤１８はプラ
スチック、医療用のセメント、セラミック等の無機物質
等で針管２（１２）と接着するものであれば何でも採用
することができ、充填剤１８の着色の色は刃面の向きが
識別できれば何でも採用することができる。またプラス
チック被膜７（１７）も生体適合性の良いプラスチック
であれば何でも使用することができ、膜の厚さも使用目
的により適宜調整することができる。In the present invention, the shape of the blade surface 3 (13) is not limited to the illustrated one, but has a sharp tip 4 (14) and a welded portion 6 (filler 18) at the rear end 5 (15). Any shape can be adopted as long as it is arranged.
The filling form of the filler 18 filling the gap on the side of the needle tube 12 only needs to fill the gap on the side of the needle tube 12 for the time being, and has the same thickness as other constituent materials of the needle tube 12 as shown in FIG. Need not be filled. Any filler 18 can be used as long as it is an inorganic substance such as plastic, medical cement, ceramic or the like and adheres to the needle tube 2 (12). Anything can be adopted if it can be identified. Also, any plastic film having good biocompatibility can be used for the plastic film 7 (17), and the thickness of the film can be appropriately adjusted according to the purpose of use.
【０００６】本発明のように溶接部６（充填剤１８）を
刃面３（１３）の後端５（１５）に確実に配置するに
は、医療用針１（１１）のパイプ状の構成材料を所望の
長さに切断した後、切断面を研磨する前に溶接部６（充
填剤１８）の位置をセンサー等で検出して、溶接部６
（充填剤１８）が刃面３（１３）の後端５（１５）に位
置するように位置決めをしてから研磨することにより行
うことができる。In order to securely place the welded portion 6 (filler 18) on the rear end 5 (15) of the blade surface 3 (13) as in the present invention, the medical needle 1 (11) has a pipe-like configuration. After cutting the material to a desired length and before polishing the cut surface, the position of the welded portion 6 (filler 18) is detected by a sensor or the like, and the position of the welded portion 6 is detected.
Polishing is performed after positioning so that the (filler 18) is located at the rear end 5 (15) of the blade surface 3 (13).
【０００７】[0007]
【発明の作用効果】請求項１と請求項２の発明では刃面
の鋭利な切れ味を確保することができるので患者に苦痛
を与えることがなく安心して使用することができる。請
求項３の発明では刃面１３の向き（先端１４の向き）を
容易に知ることができるので穿刺作業を効率良く行うこ
とができる。請求項４の発明では生体の金属アレルギー
抑制することができるので、安全性が高く、針の構造を
簡略化することができ、コスト的に有利である。請求項
５の発明では、確実に溶接部６（充填剤１８）が刃面３
（１３）の後端に位置するように医療用針１（１１）を
製造することができる。According to the first and second aspects of the present invention, the sharpness of the blade surface can be ensured, so that the patient can be used safely without causing any pain. According to the third aspect of the present invention, the direction of the blade surface 13 (the direction of the distal end 14) can be easily known, so that the puncturing operation can be performed efficiently. According to the invention of claim 4, since metal allergy in the living body can be suppressed, the safety is high, the structure of the needle can be simplified, and the cost is advantageous. According to the fifth aspect of the present invention, the welded portion 6 (filler 18) is surely
(13) The medical needle 1 (11) can be manufactured so as to be located at the rear end.
【図１】本発明の医療用針の概略図（（Ａ）は正面図、
（Ｂ）は平面図、（Ｃ）は（Ａ）のＡ−Ａ断面図）FIG. 1 is a schematic view of a medical needle of the present invention ((A) is a front view,
(B) is a plan view, and (C) is a cross-sectional view taken along line AA of (A).)
【図２】本発明の医療用針のその他の実施例を示す概略
図（（Ａ）は正面図、（Ｂ）は平面図、（Ｃ）は（Ａ）
のＢ−Ｂ断面図）FIG. 2 is a schematic view showing another embodiment of the medical needle of the present invention ((A) is a front view, (B) is a plan view, and (C) is (A).
BB cross-section)
【図３】医療用針の製造工程を示す概略図FIG. 3 is a schematic view showing a manufacturing process of a medical needle.
【図４】従来の医療用針の概略図（（Ａ）は正面図、
（Ｂ）は平面図、（Ｃ）は（Ａ）のＣ−Ｃ断面図）FIG. 4 is a schematic view of a conventional medical needle ((A) is a front view,
(B) is a plan view, and (C) is a cross-sectional view taken along line CC of (A).
１、１１ 医療用針 ２、１２ 針管 ３、１３ 刃面 ４、１４ （刃面の）先端 ５、１５ （刃面の）後端 ６ 溶接部 ７、１７ プラスチック被膜 １８ 充填剤 1,11 Medical needle 2,12 Needle tube 3,13 Blade surface 4,14 Front end (of blade surface) 5,15 Rear end (of blade surface) 6 Weld 7,7 Plastic coating 18 Filler
Claims (5)
ることなく、溶接部６を刃面の後端５に配置したことを
特徴とする医療用針１。1. A medical needle 1 wherein the welded portion 6 of the needle tube 2 is arranged at the rear end 5 of the blade surface without being arranged at the front end 4 of the blade surface.
し、充填剤１８を刃面の先端１４に配置することなく、
充填剤１８を刃面の後端１５に配置したことを特徴とす
る医療用針１１。2. A filler 18 is filled in the gap on the side of the needle tube 12, and the filler 18 is not disposed at the tip 14 of the blade surface.
The medical needle 11 characterized in that the filler 18 is arranged at the rear end 15 of the blade surface.
る請求項２に記載の医療用針１１。3. The medical needle 11 according to claim 2, wherein the filler 18 is colored.
ラスチック被膜７（１７）を形成したことを特徴とする
請求項１ないし請求項３に記載の医療用針１（１１）。4. The medical needle 1 (11) according to claim 1, wherein a plastic coating 7 (17) is formed on at least the outer periphery of the needle tube 2 (12).
１ないし請求項４に記載の医療用針の製造方法。 （１）医療用針１（１１）のパイプ状の構成材料を所望
の長さに切断する工程、（２）（１）の切断面の溶接部
６（充填剤１８）が刃面３(１３)の後端５（１５）に位
置するように位置決めをしてから刃面３（１３）を研摩
する工程。5. The method for manufacturing a medical needle according to claim 1, comprising the following steps. (1) a step of cutting the pipe-shaped constituent material of the medical needle 1 (11) to a desired length; (2) the welded portion 6 (filler 18) of the cut surface of (1) is cut by the blade surface 3 (13) ) A step of polishing the blade surface 3 (13) after positioning it so as to be located at the rear end 5 (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11231490A JP2001054573A (en) | 1999-08-18 | 1999-08-18 | Medical needle and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11231490A JP2001054573A (en) | 1999-08-18 | 1999-08-18 | Medical needle and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001054573A true JP2001054573A (en) | 2001-02-27 |
Family
ID=16924317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11231490A Pending JP2001054573A (en) | 1999-08-18 | 1999-08-18 | Medical needle and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001054573A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007038021A (en) * | 2006-11-06 | 2007-02-15 | Terumo Corp | Metal injection needle |
| JP2009525801A (en) * | 2006-02-09 | 2009-07-16 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Apparatus for monitoring patient status and treatment based on the status |
| KR100942858B1 (en) * | 2002-05-07 | 2010-02-17 | 데루모 가부시끼 가이샤 | Metal tubular body and manufacturing method thereof |
| KR20200100346A (en) * | 2019-02-18 | 2020-08-26 | 주식회사 스핀 | Method for manufacturing painless injection needle and the painless injection needle |
| WO2021241776A1 (en) * | 2020-05-28 | 2021-12-02 | 주식회사 스핀 | Method for manufacturing painless injection needle, and painless injection needle |
-
1999
- 1999-08-18 JP JP11231490A patent/JP2001054573A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100942858B1 (en) * | 2002-05-07 | 2010-02-17 | 데루모 가부시끼 가이샤 | Metal tubular body and manufacturing method thereof |
| JP2009525801A (en) * | 2006-02-09 | 2009-07-16 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Apparatus for monitoring patient status and treatment based on the status |
| JP2007038021A (en) * | 2006-11-06 | 2007-02-15 | Terumo Corp | Metal injection needle |
| KR20200100346A (en) * | 2019-02-18 | 2020-08-26 | 주식회사 스핀 | Method for manufacturing painless injection needle and the painless injection needle |
| KR102165489B1 (en) | 2019-02-18 | 2020-11-05 | 주식회사 케이바이오미라클니들 | Method for manufacturing painless injection needle and the painless injection needle |
| WO2021241776A1 (en) * | 2020-05-28 | 2021-12-02 | 주식회사 스핀 | Method for manufacturing painless injection needle, and painless injection needle |
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