JPH0636819B2 - Medical treatment equipment - Google Patents
Medical treatment equipmentInfo
- Publication number
- JPH0636819B2 JPH0636819B2 JP63022099A JP2209988A JPH0636819B2 JP H0636819 B2 JPH0636819 B2 JP H0636819B2 JP 63022099 A JP63022099 A JP 63022099A JP 2209988 A JP2209988 A JP 2209988A JP H0636819 B2 JPH0636819 B2 JP H0636819B2
- Authority
- JP
- Japan
- Prior art keywords
- stainless steel
- suture needle
- medical treatment
- medical
- reamer
- 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
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/04—Surgical instruments, devices or methods, e.g. tourniquets for suturing wounds; Holders or packages for needles or suture materials
- A61B17/06—Needles ; Sutures; Needle-suture combinations; Holders or packages for needles or suture materials
- A61B17/06066—Needles, e.g. needle tip configurations
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Materials For Medical Uses (AREA)
- Surgical Instruments (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、縫合針、リーマ、ファイル等の医療用細物
治療器具、特にオーステナイト系ステンレス鋼からなる
医療用細物治療器具に関するものである。Description: TECHNICAL FIELD The present invention relates to a medical treatment instrument for medical items such as a suture needle, a reamer, and a file, and particularly to an instrument for medical items treatment made of austenitic stainless steel. .
［従来の技術］ 一般に、縫合針等の医療用細物治療器具においては、錆
にくく、かつ靱性に富んで折れにくいという観点から、
オーステナイト系ステンレス鋼、特に１８Ｃｒ−８Ｎｉ
ステンレス鋼（以下、１８−８ステンレスと称する。）
が用いられている。この場合、刃物としての強度を向上
させるために素材に線引き加工（特開昭６１−２２３１
２３号公報参照）を施している。このようにして製造さ
れた医療用細物治療器具は、刃物としての硬度（Ｈｖ５
００以上）を備えるのみならず、１８−８ステンレスが
有する靱性をそのまま保持することになる。[Prior Art] Generally, in a medical instrument for treating small objects such as a suture needle, from the viewpoint of being resistant to rust, being tough and hard to break,
Austenitic stainless steel, especially 18Cr-8Ni
Stainless steel (hereinafter referred to as 18-8 stainless steel)
Is used. In this case, in order to improve the strength of the blade, the material is drawn (Japanese Patent Laid-Open No. 61-2231).
No. 23 publication). The medical treatment instrument for fine articles manufactured in this manner has a hardness (H v 5
(Not less than 00) and retains the toughness of 18-8 stainless steel as it is.
［発明が解決しようとする課題］ しかしながら、上記従来のオーステナイト系ステンレス
鋼からなる医療用細物治療器具は、その靱性が使用者の
要望を十分に満足させるものとはいい難かった。例え
ば、縫合針によって血管の縫合手術を行う場合、一般に
老人になると血管が石灰化（硬化）することが多く、そ
の石灰化した血管の刺通抵抗が他の血管の刺通抵抗に比
して大幅に大きくするため、その石灰化した部分を刺通
する際に縫合針を曲げてしまうことがあった。このよう
な場合、医師は曲がった縫合針を元に戻して縫合手術を
続行することになる。ところが、従来のオーステナイト
系ステンレス鋼からなる縫合針においては、後述するデ
ータから明らかなように、９０°曲げを２回〜４回程度
行うと、ほとんどの場合折れてしまうという問題があっ
た。手術中に縫合針が折れると、医師は縫合針を縫合糸
から切り離した後、縫合糸を血管から引き抜き、その後
前回の刺通箇所と同一箇所を他の縫合針によって刺通し
て縫合するようにしている。このような作業、特に前回
の刺通箇所を再度刺通するという作業は、高度の熟練と
細心の注意を要するものであり、医師の疲労を極度に高
めるものであった。[Problems to be Solved by the Invention] However, it has been difficult to say that the toughness of the conventional medical treatment instrument for medical fines made of austenitic stainless steel sufficiently satisfies the needs of the user. For example, when performing a suture operation on a blood vessel with a suture needle, in general, the blood vessel is often calcified (hardened) in an elderly person, and the puncture resistance of the calcified blood vessel is higher than that of other blood vessels. In order to make the size significantly larger, the suture needle may be bent when piercing the calcified portion. In such a case, the doctor returns the bent suture needle and continues the suturing operation. However, in a conventional suture needle made of austenitic stainless steel, as is apparent from the data described later, there is a problem that if the 90 ° bending is performed 2 to 4 times, it breaks in most cases. When the suture needle breaks during surgery, the doctor disconnects the suture needle from the suture, pulls out the suture from the blood vessel, and then punctures the same place as the previous puncture point with another suture needle and sutures it. There is. Such work, in particular, the work of re-piercing the previous piercing site requires a high degree of skill and meticulous attention and extremely increases the fatigue of the doctor.
このような点は、歯科用のリーマあるいはファイルにい
ても同様であり、それらの刃部の靱性が低いため、刃部
の先端部が折れて治療中の歯の根管内部に残ることがあ
り、その折損部の除去に多大な労力を要するという問題
があった。This also applies to a dental reamer or file, and because the blades have low toughness, the tips of the blades may break and remain inside the root canal of the tooth being treated. However, there is a problem that a great amount of labor is required to remove the broken portion.
この発明は、上記の課題を解決するためになされたもの
で、従来のものに比して靱性が大幅に向上した医療用細
物治療器具を提供することを目的とする。The present invention has been made to solve the above problems, and an object of the present invention is to provide a medical instrument for treating small objects, which has significantly improved toughness as compared with conventional ones.
［課題を解決するための手段］ この出願の発明者は、オーステナイト系ステンレス鋼か
らなる医療用細物治療器具の靱性を向上させるために鋭
意研究し、まず靱性が低い原因を追及したところ、その
原因がオーステナイト系ステンレス鋼に含まれている硫
黄(S)にあることが判明した。すなわち、従来の医療用
細物治療器具に用いられているオーステナイト系ステン
レス鋼は、３０〜７０ppm程度の硫黄を含有しているの
であるが、この含有量を所定量以下にすると、靱性が飛
躍的に向上するという知見を得るに至ったのである。[Means for Solving the Problem] The inventor of the present application has conducted earnest research to improve the toughness of a medical instrument for medical treatment of fine products made of austenitic stainless steel, and first investigated the cause of the low toughness. It was found that the cause was sulfur (S) contained in austenitic stainless steel. That is, although the austenitic stainless steel used for the conventional medical treatment apparatus for fine products contains about 30 to 70 ppm of sulfur, if the content is set to the predetermined amount or less, the toughness is remarkably increased. It has come to the knowledge that it will be improved.
この発明は、そのような知見に基づいてなされたもので
あり、上記の課題を解決するために、オーステナイト系
ステンレス鋼の硫黄含有率（重量比；以下同じ）を２０
ppm以下に設定したものである。The present invention has been made based on such knowledge, and in order to solve the above problems, the sulfur content (weight ratio; the same applies hereinafter) of austenitic stainless steel is set to 20.
It is set to ppm or less.
［実施例］ 以下、この発明の実施例について説明する。[Examples] Examples of the present invention will be described below.
実施例１． 実施例１では、１８−８ステンレスからなる縫合針の繰
り返し曲げによる靱性試験を行った。縫合針は、第１図
に示すような１８０°湾曲したものとし、次の３種の寸
法を有するものについて試験した。Example 1. In Example 1, a toughness test was performed by repeatedly bending a suture needle made of 18-8 stainless steel. The suture needle was curved 180 ° as shown in FIG. 1, and was tested for one having the following three dimensions.
(A)ＴＨ１３−１３×２８ なお、この称呼寸法は、（株）松谷製作所発行のカタロ
グ「SURGICAL EYELESS NEEDLES(HOLE END TYPE)」に記載
のものであり、針元の直径Ｄおよび湾曲させる以前の長
さＬは、次のとおりである。(A) TH13-13 × 28 This nominal size is described in the catalog “SURGICAL EYELESS NEEDLES (HOLE END TYPE)” issued by Matsutani Manufacturing Co., Ltd., and it is the diameter D of the needle base and before bending. The length L is as follows.
（以下、同様） Ｄ＝０．２８mm Ｌ＝１３mm (B)ＴＨ２５−３３×６３ Ｄ＝０．６３mm Ｌ＝２５mm (C)ＴＨ４０−５５×１１８ Ｄ＝１．１８mm Ｌ＝４０mm 上記の３種の縫合針について、本発明品として硫黄含有
率が１０，２０ppmであるものを、比較する従来品とし
て硫黄含有率が３０，４０，５０，６０，７０ppmのも
のをそれぞれ１００本宛準備した。なお、硫黄含有率以
外の成分を本発明品と従来品とで同一にしたのは勿論で
ある。(The same applies hereinafter) D = 0.28 mm L = 13 mm (B) TH25-33 × 63 D = 0.63 mm L = 25 mm (C) TH40-55 × 118 D = 1.18 mm L = 40 mm As for the suture needles, one having a sulfur content of 10,20 ppm as the present invention product and one having a sulfur content of 30,40,50,60,70 ppm as a conventional product for comparison were prepared for 100 needles each. Of course, the components other than the sulfur content were the same for the product of the present invention and the conventional product.
また、試験方法は、第２図に示すように、縫合針の略中
央部を９０°曲げるものであり、曲げ回数については実
線で示す状態から想像線で示す状態までの曲げを曲げ回
数１回とするとともに、想像線で示す状態から実線で示
す元の状態までの曲げを曲げ回数１回とし、縫合針が破
断するまでの破断曲げ回数を測定した。As shown in FIG. 2, the test method is to bend the substantially central portion of the suture needle by 90 °, and the number of bends is from the state shown by the solid line to the state shown by the imaginary line once. In addition, the bending from the state shown by the imaginary line to the original state shown by the solid line was set to one bending number, and the number of break bending until the suture needle was broken was measured.
寸法(A),(B),(C)を有する各縫合針に対する曲げ試験の
結果をそれぞれ第３図(A),(B),(C)に示す。これらの図
は、各含有率の縫合針が破断に至るまでの曲げ回数の平
均値を示すものでる。これらの図から明らかなように、
本発明品は従来品に比して破断に至るまでの曲げ回数が
２倍以上と大幅に向上した。The results of the bending test for each suture needle having the dimensions (A), (B) and (C) are shown in FIGS. 3 (A), (B) and (C), respectively. These figures show the average value of the number of times of bending until the suture needle of each content rate breaks. As you can see from these figures,
The product of the present invention has significantly improved the number of times of bending until breakage to twice or more as compared with the conventional product.
実施例２ 実施例２では、１８−８ステンレスからなるファイルま
たはリーマの捩り試験による靱性比較を行った。ファイ
ルまたはリーマは、第４図に示す形状を有しており、次
の３種の寸法のものについて試験した。Example 2 In Example 2, a toughness comparison was made by a torsion test of a file or reamer made of 18-8 stainless steel. The file or reamer had the shape shown in FIG. 4 and was tested for the following three sizes.
(A)１５Ｋ−２１（ファイル） なお、この呼称寸法は、（株）松谷製作所発行のカタロ
グ「REAMERS、EILES、BROACHES」に記載のものであり、図示
のように刃長が１６mmである以外、直径Ｄおよび首下長
さＬは、次のとおりである。(A) 15K-21 (file) This nominal size is described in the catalog "REAMERS, EILES, BROACHES" issued by Matsutani Manufacturing Co., Ltd., except that the blade length is 16 mm as shown in the figure. The diameter D and the length L under the neck are as follows.
（以下、同様） Ｄ＝０．１５mm Ｌ＝２１mm (B)２０Ｋ−２１（ファイル） Ｄ＝０．２０mm Ｌ＝２１mm (C)１５Ｒ−２１（リーマ） Ｄ＝０．１５mm Ｌ＝２１mm 上記のファイルおよびリーマについて、本発明品として
硫黄含有率が１０，２０ppmであるものを、比較する従
来品として硫黄含有率が３０，４０，５０，６０，７０
ppmのものをそれぞれ１００本宛準備した。なお、硫黄
含有率以外の成分を本発明品と従来品とで同一にしたの
は勿論である。(Same below) D = 0.15mm L = 21mm (B) 20K-21 (file) D = 0.20mm L = 21mm (C) 15R-21 (reamer) D = 0.15mm L = 21mm File above Regarding the reamer and the reamer, the sulfur content of 10,20 ppm as the product of the present invention is compared with that of the conventional product having the sulfur content of 30,40,50,60,70.
We prepared 100 ppm each. Of course, the components other than the sulfur content were the same for the product of the present invention and the conventional product.
また、試験方法は、ＩＳＯ規格に指定された歯科根管治
療器具の捩り試験に基づくものであり、第４図に示すよ
うに、ファイル（リーマ）の先端から３mmまでの範囲を
固定し、シャンク側を図の矢印方向へ捩るようにし、フ
ァイル（リーマ）が破断するまでの捩り角度を測定し
た。The test method is based on the torsion test of the dental root canal treatment device specified in the ISO standard, and as shown in FIG. 4, fix the range from the tip of the file (reamer) to 3 mm, and shank. The side was twisted in the direction of the arrow in the figure, and the twist angle until the file (reamer) was broken was measured.
寸法(A),(B),(C)を有するファイルまたはリーマに対す
る捩り試験の結果を第５図(A),(B),(C)にそれぞれ示
す。これらの図は、各含有率のファイルまたはリーマが
破断に至るまでの捩り角度を示すものでる。これらの図
から明らかなように、本発明品は従来品に比して破断に
至るまでの捩り角度がいずれの場合にあっても３倍以上
と大幅に向上した。The results of the torsion test for the file or reamer having the dimensions (A), (B) and (C) are shown in FIGS. 5 (A), (B) and (C), respectively. These figures show the twist angle until the file or reamer with each content rate breaks. As is apparent from these figures, the product of the present invention has a twisting angle up to three times or more that of the conventional product, which is significantly improved compared to the conventional product.
なお、以上の実施例は、１８−８ステンレスからなる医
療器具についてのものであるが、他のオーステナイト系
ステンレス鋼、例えば１８−１１、１８−１３、１７−
４、２３−１４、２５−２１等のオーステナイト系ステ
ンレス鋼からなる医療器具についても同様な効果が得ら
れる。In addition, although the above-mentioned example is about a medical device made of 18-8 stainless steel, other austenitic stainless steels, for example, 18-11, 18-13, 17-.
Similar effects can be obtained for medical devices made of austenitic stainless steel such as 4, 23-14, 25-21.
「発明の効果」 以上説明したように、この発明の医療用細物治療器具に
よれば、オーステナイト系ステンレス鋼の硫黄含有率を
２０ppm以下にしたものであるから、治療器具の靱性を
大幅に向上させることができ、これによって縫合針等の
治療器具の破断事故を防止することができ、ひいては医
師の疲労を軽減して医療の万全を期することができると
いう効果が得られる。"Effects of the Invention" As described above, according to the medical treatment instrument for fine articles of the present invention, since the sulfur content of the austenitic stainless steel is set to 20 ppm or less, the toughness of the treatment instrument is significantly improved. As a result, it is possible to prevent the accidental breakage of the treatment instrument such as the suture needle, and to reduce the fatigue of the doctor to ensure the medical care.
第１図は縫合針を示す側面図、第２図は曲げ試験の方法
を示す図、第３図(A),(B),(C)は曲げ試験の結果を示す
図、第４図はファイル（リーマ）を示すとともに、捩り
試験の方法を示す図、第５図(A),(B),(C)は捩り試験の
結果を示す図である。FIG. 1 is a side view showing a suture needle, FIG. 2 is a view showing a method of a bending test, FIGS. 3 (A), (B) and (C) are views showing a result of the bending test, and FIG. It is a figure which shows a file (reamer) and shows the method of a torsion test, and FIG. 5 (A), (B), (C) is a figure which shows the result of a torsion test.
Claims (1)
物治療器具において、ステンレス鋼の硫黄含有率（重量
比）を２０ppm以下にしたことを特徴とする医療用細物
治療器具。1. A medical acupuncture device for medical treatment of austenitic stainless steel, wherein the sulfur content (weight ratio) of the stainless steel is 20 ppm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63022099A JPH0636819B2 (en) | 1988-02-03 | 1988-02-03 | Medical treatment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63022099A JPH0636819B2 (en) | 1988-02-03 | 1988-02-03 | Medical treatment equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01198554A JPH01198554A (en) | 1989-08-10 |
| JPH0636819B2 true JPH0636819B2 (en) | 1994-05-18 |
Family
ID=12073435
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63022099A Expired - Lifetime JPH0636819B2 (en) | 1988-02-03 | 1988-02-03 | Medical treatment equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0636819B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08173456A (en) * | 1994-12-27 | 1996-07-09 | Matsutani Seisakusho Co Ltd | Production of dental root canal treating appliance and dental root canal treating appliance |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9554854B2 (en) | 2014-03-18 | 2017-01-31 | Ethicon Endo-Surgery, Llc | Detecting short circuits in electrosurgical medical devices |
-
1988
- 1988-02-03 JP JP63022099A patent/JPH0636819B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08173456A (en) * | 1994-12-27 | 1996-07-09 | Matsutani Seisakusho Co Ltd | Production of dental root canal treating appliance and dental root canal treating appliance |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01198554A (en) | 1989-08-10 |
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