JP2004346185A - Composition for medical equipment cleaner - Google Patents
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Abstract
Description
【0001】
【発明の属する技術分野】
本発明は、医療器具、特に、血液等の体液及び/又は尿等の排泄物等で汚染された、金属、ガラス、プラスチック、ゴム製等の医療器具を洗浄対象とする医療器具用洗浄剤組成物に関する。
【0002】
【従来の技術】
病院では手術、診療、検査等で使用した器具は、B型肝炎、C型肝炎、後天性免疫不全症候群等の感染から医療従事者を守るため、洗浄室あるいは中央材料室といった専門の施設で、手袋、マスク、ゴーグル等で感染防御した専門家が洗浄を行っている。近年、これら感染対策を更に高めるため、自動洗浄機が普及してきた。
【0003】
手術、診療、検査等で使用した器具は血液等の体液、排泄物等が付着しており、これらの汚れ成分はタンパク質を主としたものである。これらの汚れは付着後すぐであれば比較的簡単に落とせるが、放置することや、熱、消毒剤などの影響により、固化、変性を起こし、非常に落としづらい汚れとなる。しかしながら、使用後ただちに器具を回収し洗浄を行うことは病院業務の現状においては困難であることが多い。このような背景から、これら病院特有の汚れに対して効果的に洗浄できる洗浄剤が望まれている。
【0004】
これら汚れの付着した医療器具を、洗浄機を用いて洗浄する場合、アルカリ洗浄剤が有効である。しかしながら、アルカリ洗浄剤を用いた場合、水(水道水や地下水)に含まれる二価金属イオンと炭酸イオンあるいは珪酸イオンが結合し、水不溶性の化合物を生成する。そのため、洗浄機槽内にこの水不溶性化合物が徐々に付着し、スケールと言われるもので白く汚れてくるといった問題がある。すなわち、体液、排泄物などの汚れを効果的に落とし、更にスケールにより槽内が汚染されない洗浄剤が望まれている。
【0005】
特許文献1では炭素数5から12のアルキルスフェート塩、配合助剤、アルカノ−ルアミン、タンパク質分解酵素からなる外科用器具用洗浄剤が提案されているが、洗浄性がいまだ不充分であり、機械洗浄においては泡立ちの問題が生じる。特許文献2でもアルカノ−ルアミンを主とした洗浄剤が提案されているが、汚れ負荷が大きくなったときの洗浄性に問題を残している。
【0006】
更に、特許文献3ではアルカリ剤に有機リン系キレート剤と高分子水溶性分散剤を配合しスケール付着防止効果に優れた食器洗浄機用洗浄剤組成物が、特許文献4ではアルカノールアミン、アルカリ化合物、水溶性高分子キレート形成剤を含有する無機物が付着残留しない食器洗浄器用洗浄剤が、特許文献5では水酸化ナトリウム又は水酸化カリウム、ケイ酸ナトリウム、高分子キレート形成剤を特定比率で含有するスケール付着残留しない食器洗浄機用液状洗浄剤が提案されている。しかしながら、これらの組成においても、スケール付着を完全に防止するに至っておらず、また、医療器具に付着する体液、排泄物等が固化、変質した汚れを洗浄対象としていないため、十分な洗浄効果も期待できない。
【0007】
【特許文献1】
特表平9−512586号公報
【特許文献2】
特表平2001−519462号公報
【特許文献3】
特開平10−226800号公報
【特許文献4】
特開2000−256700号公報
【特許文献5】
特開2002−38193号公報
【0008】
【発明が解決しようとする課題】
上記のように、医療現場での医療器具洗浄工程の効率化を目的として、固化あるいは変質した血液等の体液、排泄物等を主な汚れとする医療器具の洗浄には、洗浄機が用いられるが、本発明は、これら汚れに対して優れた洗浄力を示し、洗浄機槽内にスケールを付着させない洗浄剤組成物ならびにそれを用いた洗浄方法を提供することを目的とする。更に、このような効果を有する組成物であって、保存安定性に優れた組成物を提供することを目的とする。
【0009】
【課題を解決するための手段】
本発明は、(A)アルカリ金属水酸化物〔以下、(A)成分という〕、(B)アミノカルボン酸系キレート剤〔以下、(B)成分という〕、(C)クエン酸及びその塩、グルコン酸及びその塩、イミノジメチルホスホン酸及びその塩、アミノトリ(メチレンホスホン酸)及びその塩、1−ヒドロキシエチリデン−1,1−ジホスホン酸及びその塩から選ばれる1種以上の化合物〔以下、(C)成分という〕、(D)ポリカルボン酸系ポリマー及び/又はその塩〔以下、(D)成分という〕、並びに(E)水〔以下、(E)成分という〕を含有し、重量比が(A)/(B)=0.25〜0.5、(C)/(B)=0.2〜0.6、(D)/(B)=0.3〜0.6である、血液等の体液、排泄物、組織片等で汚染された医療器具用洗浄剤組成物に関する。
【0010】
また、本発明は、上記本発明の医療器具用洗浄剤組成物を0.1〜1重量%含有する30〜70℃の水溶液を、1〜25分間、体液、排泄物及び組織片の少なくとも何れかで汚染された医療器具に接触させる工程を有する医療器具の洗浄方法に関する。
【0011】
【発明の実施の形態】
<(A)成分>
(A)成分としては、水酸化ナトリウム、水酸化カリウム等が挙げられる。
【0012】
<(B)成分>
(B)成分としては、エチレンジアミン4酢酸及びその塩、ニトリロ3酢酸及びその塩等が挙げられ、好ましくはエチレンジアミン4酢酸及びその塩である。
【0013】
<(C)成分>
(C)成分は、(C)クエン酸及びその塩、グルコン酸及びその塩、イミノジメチルホスホン酸及びその塩、アミノトリ(メチレンホスホン酸)及びその塩、並びに、1−ヒドロキシエチリデン−1,1−ジホスホン酸及びその塩から選ばれる1種以上の化合物であり、好ましくはクエン酸及びその塩、特に好ましくはクエン酸塩である。
【0014】
<(D)成分>
(D)成分は、ポリカルボン酸系ポリマー及び/又はその塩であり、ポリアクリル酸及びその塩、ポリマレイン酸及びその塩、並びにアクリル酸−マレイン酸コポリマー及びその塩から選ばれる1種又は2種以上が好ましい。塩は、一部でも全部でもよく、塩としてはナトリウム、カリウム等のアルカリ金属塩や有機アミン塩が好ましい。
【0015】
ポリアクリル酸及びその塩の重量平均分子量は1,000〜20,000が好ましく、特に好ましくは2,000〜15,000である。
【0016】
また、ポリマレイン酸及びその塩の重量平均分子量は、500〜10,000が好ましく、特に好ましくは500〜5,000である。
【0017】
アクリル酸−マレイン酸コポリマー及びその塩としては、無水マレイン酸と共重合可能な他のモノマーとのコポリマーやその水溶性塩であり、下記の一般式(I)で表される構造を有するものが好ましい。
【0018】
【化1】
【0019】
〔式中、R1、R2、R3、R4は、水素原子、炭素数1〜5のアルキル基もしくはアルコキシ基、フェニル基、又はカルボキシル基を示し、Mは、水素原子、アルカリ金属又は有機アミンであり、x/y(モル比)=1/10〜10/1で、平均分子量は1,000〜100,000である。〕
【0020】
上記一般式(I)において、x/y(モル比)は1/10〜10/1であり、好ましくは3/7〜7/3である。また、式(I)で表されるアクリル酸−マレイン酸コポリマー及びその塩の重量平均分子量は1,000〜100,000であり、好ましくは1,000〜20,000である。
【0021】
<医療器具用洗浄剤組成物>
本発明の医療器具用洗浄剤組成物では、(B)成分と、(A)成分、(C)成分、(D)成分の重量比が重要である。
【0022】
すなわち、(B)成分と(A)成分の重量比は、(A)/(B)=0.25〜0.5、好ましくは0.3〜0.4であり、この範囲においてスケール付着防止効果に優れ、組成物の安定性も良好となる。
【0023】
また、(B)成分と(C)成分の重量比は、(C)/(B)=0.2〜0.6、好ましくは0.25〜0.55であり、この範囲においてスケール付着防止効果に優れ、組成物の安定性も良好となる。
【0024】
また、(B)成分と(D)成分の重量比は、(D)/(B)=0.3〜0.6、好ましくは0.35〜0.5であり、この範囲においてスケール付着防止効果に優れ、組成物の安定性も良好となる。
【0025】
(A)成分は、取り扱い性及び安全性の観点から、組成物中、5重量%未満の範囲で含有されることが好ましく、下限は洗浄性の観点から、2重量%以上、更に3重量%以上、特に4重量%以上が好ましい。
【0026】
(B)成分は、スケール付着防止及び組成物の保存安定性の観点から、組成物中、3〜25重量%、更に5〜20重量%含有されることが好ましい。
【0027】
(C)成分は、スケール付着防止及び組成物の保存安定性の観点から、組成物中、1〜12重量%、更に2〜10重量%含有されることが好ましい。
【0028】
(D)成分は、スケール付着防止及び組成物の保存安定性の観点から、組成物中、1〜12重量%、更に2〜10重量%含有されることが好ましい。
【0029】
本発明の洗浄剤組成物は、希釈して用いられ、被洗浄物に付着した血液汚れ等の変性を抑制する観点から、該希釈液は、液温30〜70℃、更に30〜60℃、特に30〜50℃で用いられることが好ましい。また、該希釈液は、(A)成分の濃度が0.002〜0.05重量%であることが好ましい。
【0030】
本発明の洗浄剤組成物の洗浄対象である医療器具としては剪刀類、ピンセット類、鉗子類、持針器、膣鏡、レトラクター、蛇管、チューブ、カテーテル、内視鏡及び生検鉗子等の内視鏡用器具、カート等が挙げられる。
【0031】
本発明の医療器具用洗浄剤組成物は、残部の(E)成分を含有する。また、上記(A)〜(E)成分以外に、本発明の効果を損なわない範囲で、以下の成分を配合できる。
(1)炭酸ナトリウム、炭酸カリウムなどの炭酸塩類、
(2)1号珪酸ナトリウム、1号珪酸カリウム、オルト珪酸ナトリウム、オルト珪酸カリウム、メタ珪酸ナトリウム、メタ珪酸カリウム、2号珪酸ナトリウム、2号珪酸カリウムなどの珪酸塩類
(3)モノエタノールアミン、ジエタノールアミン、トリエタノールアミン、モノプロパノールアミン、ジプロパノールアミン、トリプリパノールアミンなどのアルカノールアミン類、
(4)脂肪酸塩、アルキルベンゼンスルホン酸塩、アルキル硫酸塩、ポリオキシエチレンアルキルエーテル硫酸塩などのアニオン界面活性剤
(5)ポリオキシエチレンアルキルエーテル、アルキルポリグルコシド、ソルビタンエステル及びそのエチレンオキシド付加物、ポリエチレンオキサイド/ポリプロピレンオキサイドのブロックポリマーなどのノニオン界面活性剤
(6)アルキルジメチルアミノ酢酸ベタイン、アルキルアミンオキシド、脂肪酸アミドプロピルベタインなどの両性界面活性剤
(7)塩化アルキルトリメチルアンモニウム、塩化ベンザルコニウムなどのカチオン界面活性剤
(8)メタノール、エタノール、プロパノール、ブタノール、エチレングリコール、プロピレングリコール、ジエチレングリコール、ジプロピレングリコールなどの溶剤類
(9)プロテアーゼ等の酵素類
(10)殺菌剤、色素、着色剤、香料
【0032】
<洗浄方法>
本発明の医療器具用洗浄剤組成物は水で希釈した水溶液として用いられることが好ましい。当該水溶液中の組成物濃度は、0.1〜1重量%、更に0.1〜0.5重量%が洗浄性、低損傷性、すすぎ性の点で好ましい。また、このような水溶液は30〜70℃、更に30〜60℃、特に30〜50℃で用いられることが好ましい。このような組成物濃度、温度の水溶液を、1〜25分間、更に2〜15分間、体液及び/又は排泄物等で汚染された医療器具に接触させることで、医療器具を洗浄する。体液及び/又は排泄物等は、血液、羊水、心嚢液、腹水、胸水、関節骨液、脊髄液、精液、膣分泌液、耳鼻分泌液、創からの滲出液、尿、便、組織片等である。
【0033】
前記水溶液を医療器具と接触させる方法としては、医療器具を水溶液に浸漬する方法、水溶液を医療器具に噴霧する方法が挙げられ、噴霧する方法が洗浄性の点で好ましい。浸漬する方法では、超音波を作用させてもよい。噴霧する方法では、複数の吐出口を有する回転ノズルにより水溶液を噴霧することが均一な接触の点で好ましく、併せて水溶液をポンプ等で搬送して循環使用することが水溶液の有効利用の点で好ましい。
【0034】
本発明の洗浄剤組成物は、自動洗浄機を用いた洗浄に好適である。自動洗浄機としては、自動ジェット式洗浄装置が挙げられる。通常、このような自動洗浄機を用いた洗浄では、
(1)予備洗浄(洗浄剤なし、0〜70℃の水による洗浄)、
(2)本洗浄(洗浄剤の0.1〜1重量%水溶液を用いて30〜70℃で1〜25分間洗浄する)、
(3)すすぎ(0〜70℃の水によるすすぎ)、
(4)消毒(一例として93℃の水で10分間熱水消毒)、
(5)乾燥
等の工程が自動的に連続して行われる。該装置では、被洗浄物である医療器具を載せる網棚が多段式に設けられており、通常、洗浄槽内の天井及び各網棚の下に、複数の吐出口を有する回転ノズルが設けられている。該ノズルから水溶液が被洗浄物に向けて噴霧される。また、噴霧された水溶液は装置の一箇所に集められ、(2)の本洗浄の間、ポンプ等により外部循環させて噴霧に再利用される。
【0035】
【実施例】
(1)洗浄性
卵黄/馬無菌脱繊血/牛レバー=30/40/20(重量比)をミキサーで均一になるまで撹拌混合したモデル汚れ0.2gを、1mm×30mm×80mmのステンレス板(SUS304)の中央部で30mm×40mmの面積に均一に塗布し、40℃で24時間乾燥させたものをテストピースとした。該テストピースのモデル汚れ塗布面側に、該テストピースと同じ大きさのステンレス板を、間隔1mmで配置して重ねたもの(積層テストピース)を試験に用いた。なお、テストピースと該テストピースの作製に用いたステンレス板(モデル汚れ塗布前のテストピース)はそれぞれの重量を予め測定しておく。
【0036】
積層テストピースを、自動ジェット式洗浄装置DEKO−2000E(フランケ・フィンランド社製)の洗浄槽内の最下段同位置に45°の角度で設置した。洗浄(洗浄剤あり)5分、温水すすぎ3分の工程で洗浄を行った。この装置では、洗浄液はポンプによる外部搬送により循環使用される。すすぎ後の積層テストピースを80°で1時間乾燥させ、積層テストピースのうちテストピースの重量を測定した。洗浄前後のこれらの重量から、以下の式により洗浄率を算出し、洗浄性の評価とした。
【0037】
洗浄率(%)=100−[(WT1−WS)/(WT0−WS)×100]
WT0:洗浄前のテストピースの重量(g)
WT1:洗浄後のテストピースの重量(g)
WS:テストピースの作製に用いたステンレス板の重量(g)
【0038】
(2)スケール付着防止性
ドイツ硬度8.0°の水を用い、洗浄剤組成物濃度を0.2重量%として、自動ジェット式洗浄装置DEKO−2000E(フランケ・フィンランド社製)を連続20回運転(被洗浄物は入れない)後、洗浄槽内のスケールの付着状況を目視で観察し、以下の基準で評価した。
○:スケールの付着が全くない。
△:わずかにスケールの付着が認められる。
×:スケールの付着が認められる。
【0039】
(3)保存安定性
表1の組成物を、0℃で1ヶ月又は40℃で1ヶ月保存し、外観の様子を観察し、以下の基準で評価した。
○:均一溶解しており、保存前と変化なし。
△:わずかに結晶析出、濁り発生、分離が認められる。
×:結晶析出、濁り発生、分離が明らかに認められる。
【0040】
【表1】
【0041】
表中、Mwは重量平均分子量であり、洗浄濃度は液体洗浄剤組成物の濃度(水溶液中の組成物濃度)である。なお、比較例5、6は、便宜的にグリコール酸Na塩、ピロリン酸Na塩を(C)成分として重量比を算出した。
【0042】
表1にあるように、実施例の組成物は、何れも、保存安定性に優れ、且つ洗浄性、スケール付着防止性に優れている。一方、(A)/(B)、(C)/(B)、(D)/(B)重量比が本発明の範囲外である比較例の組成物は、洗浄性、スケール付着防止性、保存安定性のいずれかに問題が発生する。また、比較例5、6のように、これら重量比が本発明の範囲内であっても、(C)成分に該当しない化合物を用いた場合は、洗浄性は低下する傾向があり、しかもスケール付着防止性は悪くなる。、
【0043】
【発明の効果】
本発明によれば、血液等の体液や排泄物等で汚染された医療器具に対する優れた洗浄力を示し、スケール付着防止効果に優れ、且つ保存安定性の良好な医療器具用洗浄剤組成物が得られる。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cleaning composition for a medical device, particularly a medical device made of metal, glass, plastic, rubber or the like, which is contaminated with body fluids such as blood and / or excrement such as urine. About things.
[0002]
[Prior art]
In hospitals, instruments used for surgery, medical treatment, examinations, etc. are used in specialized facilities such as washing rooms or central materials rooms to protect healthcare workers from infections such as hepatitis B, hepatitis C, acquired immunodeficiency syndrome, etc. Specialists who have been infected with gloves, masks, goggles, etc. are cleaning. In recent years, automatic washing machines have become widespread in order to further enhance these infection control measures.
[0003]
Instruments used in operations, medical treatments, examinations and the like have body fluids such as blood, excretions, etc. attached thereto, and these dirt components are mainly proteins. These stains can be removed relatively easily as soon as they are deposited, but they are hardened and denatured by leaving them unattended or under the influence of heat, disinfectant, etc., and become extremely difficult to remove. However, it is often difficult to collect and clean instruments immediately after use in the current state of hospital operations. From such a background, there is a demand for a cleaning agent that can effectively clean such hospital-specific stains.
[0004]
When cleaning these stained medical instruments using a washing machine, an alkali detergent is effective. However, when an alkaline cleaning agent is used, a divalent metal ion contained in water (tap water or groundwater) and a carbonate ion or a silicate ion combine to generate a water-insoluble compound. For this reason, there is a problem that the water-insoluble compound gradually adheres to the inside of the cleaning tank and becomes white with what is called scale. That is, there is a demand for a cleaning agent that effectively removes dirt such as body fluids and excrement and does not contaminate the inside of the tank with scale.
[0005]
Patent Document 1 proposes a detergent for surgical instruments comprising an alkyl phosphate salt having 5 to 12 carbon atoms, a compounding aid, an alkanolamine, and a protease, but the detergency is still insufficient. Foaming problems occur in machine cleaning. Patent Literature 2 also proposes a cleaning agent mainly composed of alkanolamine, but has a problem in cleaning performance when the dirt load increases.
[0006]
Further, Patent Document 3 discloses a detergent composition for a dishwasher excellent in an effect of preventing scale adhesion by mixing an organic phosphorus-based chelating agent and a polymer water-soluble dispersant with an alkali agent, and Patent Document 4 discloses an alkanolamine and an alkali compound. In Patent Document 5, a dishwasher detergent containing no water-soluble polymer chelate-forming agent and containing no inorganic substance contains sodium hydroxide or potassium hydroxide, sodium silicate, and a polymer chelate-forming agent in a specific ratio. Liquid cleaners for dishwashers that do not remain on scale have been proposed. However, even in these compositions, scale adhesion has not been completely prevented, and body fluids, excretions, etc. adhered to medical instruments are not solidified and deteriorated. I can't expect it.
[0007]
[Patent Document 1]
Japanese Patent Publication No. 9-512586 [Patent Document 2]
Japanese Patent Publication No. 2001-519462 [Patent Document 3]
JP-A-10-226800 [Patent Document 4]
JP 2000-256700 A [Patent Document 5]
JP-A-2002-38193
[Problems to be solved by the invention]
As described above, in order to improve the efficiency of the medical instrument cleaning process at a medical site, a washing machine is used for cleaning medical instruments mainly containing solidified or deteriorated body fluids such as blood, excrement, and the like. However, an object of the present invention is to provide a detergent composition which exhibits excellent detergency against these stains and does not cause scale to adhere to the inside of a washing machine tank, and a cleaning method using the same. It is another object of the present invention to provide a composition having such an effect and having excellent storage stability.
[0009]
[Means for Solving the Problems]
The present invention relates to (A) an alkali metal hydroxide (hereinafter, referred to as component (A)), (B) an aminocarboxylic acid-based chelating agent [hereinafter, referred to as component (B)], (C) citric acid and a salt thereof, One or more compounds selected from gluconic acid and its salts, iminodimethylphosphonic acid and its salts, aminotri (methylenephosphonic acid) and its salts, 1-hydroxyethylidene-1,1-diphosphonic acid and its salts [hereinafter, (( C) component), (D) a polycarboxylic acid-based polymer and / or a salt thereof (hereinafter, referred to as component (D)), and (E) water (hereinafter, referred to as component (E)), and the weight ratio is (A) / (B) = 0.25-0.5, (C) / (B) = 0.2-0.6, (D) / (B) = 0.3-0.6, Cleaning composition for medical devices contaminated with body fluids such as blood, excrement, tissue fragments, etc. About.
[0010]
Further, the present invention provides an aqueous solution of 30 to 70 ° C. containing 0.1 to 1% by weight of the above-mentioned cleaning composition for medical instruments of the present invention for at least one of body fluids, excrement and tissue pieces for 1 to 25 minutes. The present invention relates to a method for cleaning a medical device, the method including a step of bringing the medical device into contact with a medical device contaminated with the medical device.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
<(A) component>
Examples of the component (A) include sodium hydroxide and potassium hydroxide.
[0012]
<(B) component>
Examples of the component (B) include ethylenediaminetetraacetic acid and salts thereof, nitrilotriacetic acid and salts thereof, and preferably ethylenediaminetetraacetic acid and salts thereof.
[0013]
<(C) component>
The component (C) comprises (C) citric acid and its salt, gluconic acid and its salt, iminodimethylphosphonic acid and its salt, aminotri (methylenephosphonic acid) and its salt, and 1-hydroxyethylidene-1,1- It is one or more compounds selected from diphosphonic acids and salts thereof, preferably citric acid and salts thereof, particularly preferably citrate.
[0014]
<(D) component>
The component (D) is a polycarboxylic acid polymer and / or a salt thereof, and is one or two selected from polyacrylic acid and a salt thereof, polymaleic acid and a salt thereof, and an acrylic acid-maleic acid copolymer and a salt thereof. The above is preferable. The salt may be part or all of the salt, and the salt is preferably an alkali metal salt such as sodium or potassium or an organic amine salt.
[0015]
The weight average molecular weight of polyacrylic acid and its salts is preferably from 1,000 to 20,000, particularly preferably from 2,000 to 15,000.
[0016]
The weight average molecular weight of the polymaleic acid and its salt is preferably from 500 to 10,000, particularly preferably from 500 to 5,000.
[0017]
Acrylic acid-maleic acid copolymers and salts thereof include copolymers of maleic anhydride and other copolymerizable monomers and water-soluble salts thereof, and those having a structure represented by the following general formula (I): preferable.
[0018]
Embedded image
[0019]
[Wherein, R 1 , R 2 , R 3 , and R 4 represent a hydrogen atom, an alkyl or alkoxy group having 1 to 5 carbon atoms, a phenyl group, or a carboxyl group, and M represents a hydrogen atom, an alkali metal or It is an organic amine, x / y (molar ratio) = 1/10 to 10/1, and the average molecular weight is 1,000 to 100,000. ]
[0020]
In the above general formula (I), x / y (molar ratio) is from 1/10 to 10/1, preferably from 3/7 to 7/3. The acrylic acid-maleic acid copolymer represented by the formula (I) and the salt thereof have a weight average molecular weight of 1,000 to 100,000, preferably 1,000 to 20,000.
[0021]
<Cleaning composition for medical instruments>
In the cleaning composition for medical instruments of the present invention, the weight ratio of the component (B) to the components (A), (C) and (D) is important.
[0022]
That is, the weight ratio of the component (B) to the component (A) is (A) / (B) = 0.25 to 0.5, preferably 0.3 to 0.4. The effect is excellent, and the stability of the composition is also good.
[0023]
The weight ratio of component (B) to component (C) is (C) / (B) = 0.2 to 0.6, preferably 0.25 to 0.55. The effect is excellent, and the stability of the composition is also good.
[0024]
The weight ratio of the component (B) to the component (D) is (D) / (B) = 0.3 to 0.6, preferably 0.35 to 0.5. The effect is excellent, and the stability of the composition is also good.
[0025]
The component (A) is preferably contained in the composition in a range of less than 5% by weight from the viewpoint of handleability and safety, and the lower limit is preferably 2% by weight or more, more preferably 3% by weight from the viewpoint of detergency. Above, especially 4% by weight or more is preferable.
[0026]
The component (B) is preferably contained in the composition in an amount of 3 to 25% by weight, more preferably 5 to 20% by weight, from the viewpoints of preventing scale adhesion and storage stability of the composition.
[0027]
The component (C) is preferably contained in the composition in an amount of 1 to 12% by weight, more preferably 2 to 10% by weight, from the viewpoints of preventing scale adhesion and storage stability of the composition.
[0028]
The component (D) is preferably contained in the composition in an amount of 1 to 12% by weight, more preferably 2 to 10% by weight, from the viewpoints of preventing scale adhesion and the storage stability of the composition.
[0029]
The cleaning composition of the present invention is used after being diluted, and from the viewpoint of suppressing denaturation of blood stains and the like attached to an object to be cleaned, the diluent is at a liquid temperature of 30 to 70 ° C, further 30 to 60 ° C, In particular, it is preferably used at 30 to 50 ° C. The diluent preferably has a component (A) concentration of 0.002 to 0.05% by weight.
[0030]
Medical devices to be cleaned with the cleaning composition of the present invention include scissors, tweezers, forceps, needle holders, vaginal speculum, retractors, serpentine tubes, tubes, catheters, endoscopes and biopsy forceps. Endoscope instruments, carts, and the like.
[0031]
The cleaning composition for medical devices of the present invention contains the remaining component (E). Further, in addition to the above components (A) to (E), the following components can be blended as long as the effects of the present invention are not impaired.
(1) carbonates such as sodium carbonate and potassium carbonate,
(2) Silicates such as No. 1 sodium silicate, No. 1 potassium silicate, sodium orthosilicate, potassium orthosilicate, sodium metasilicate, potassium metasilicate, No. 2 sodium silicate, No. 2 potassium silicate, etc. (3) Monoethanolamine, diethanolamine , Alkanolamines such as triethanolamine, monopropanolamine, dipropanolamine, tripripanolamine,
(4) Anionic surfactants such as fatty acid salts, alkylbenzene sulfonates, alkyl sulfates, and polyoxyethylene alkyl ether sulfates; (5) polyoxyethylene alkyl ethers, alkyl polyglucosides, sorbitan esters and ethylene oxide adducts thereof, polyethylene Nonionic surfactants such as oxide / polypropylene oxide block polymers (6) Amphoteric surfactants such as alkyldimethylaminoacetic acid betaines, alkylamine oxides and fatty acid amidopropyl betaines (7) Alkyltrimethylammonium chloride, benzalkonium chloride, etc. Cationic surfactant (8) methanol, ethanol, propanol, butanol, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol Solvents such as Call (9) enzymes such as proteases (10) fungicides, pigments, colorants, flavors [0032]
<Washing method>
The cleaning composition for medical devices of the present invention is preferably used as an aqueous solution diluted with water. The concentration of the composition in the aqueous solution is preferably 0.1 to 1% by weight, and more preferably 0.1 to 0.5% by weight in terms of detergency, low damage, and rinsing. Further, such an aqueous solution is preferably used at 30 to 70 ° C, more preferably 30 to 60 ° C, particularly preferably 30 to 50 ° C. The medical device is washed by bringing the aqueous solution having such composition concentration and temperature into contact with the medical device contaminated with body fluid and / or excrement for 1 to 25 minutes, and further for 2 to 15 minutes. Body fluids and / or excretions include blood, amniotic fluid, pericardial effusion, ascites, pleural effusion, joint bone fluid, spinal fluid, semen, vaginal fluid, otonasal fluid, exudate from wounds, urine, stool, tissue fragments, etc. It is.
[0033]
Examples of the method of bringing the aqueous solution into contact with the medical device include a method of immersing the medical device in the aqueous solution and a method of spraying the aqueous solution on the medical device. The method of spraying is preferable in terms of detergency. In the immersion method, ultrasonic waves may be applied. In the method of spraying, it is preferable that the aqueous solution is sprayed by a rotating nozzle having a plurality of discharge ports in terms of uniform contact, and in addition, the aqueous solution is conveyed by a pump or the like and circulated for effective use of the aqueous solution. preferable.
[0034]
The cleaning composition of the present invention is suitable for cleaning using an automatic cleaning machine. As the automatic washing machine, an automatic jet type washing device can be mentioned. Usually, in the washing using such an automatic washing machine,
(1) Preliminary washing (no washing agent, washing with water at 0 to 70 ° C),
(2) main washing (washing at 30 to 70 ° C. for 1 to 25 minutes using a 0.1 to 1% by weight aqueous solution of a detergent);
(3) rinsing (rinsing with water at 0 to 70 ° C.),
(4) Disinfection (for example, hot water disinfection with 93 ° C. water for 10 minutes),
(5) Steps such as drying are automatically and continuously performed. In this device, a net shelf on which a medical device to be cleaned is placed is provided in a multi-stage manner, and usually, a rotating nozzle having a plurality of discharge ports is provided under a ceiling in the washing tank and under each net shelf. . The aqueous solution is sprayed from the nozzle toward the object to be cleaned. Further, the sprayed aqueous solution is collected at one place of the device, and is externally circulated by a pump or the like during the main washing of (2) and reused for spraying.
[0035]
【Example】
(1) Washing egg yolk / horse aseptic defibrinated blood / cow liver = 30/40/20 (weight ratio) by stirring and mixing until uniform using a mixer 0.2 g of a model soil, 1 mm × 30 mm × 80 mm stainless steel plate A test piece was uniformly applied to an area of 30 mm × 40 mm at the center of (SUS304) and dried at 40 ° C. for 24 hours. A stainless steel plate of the same size as the test piece was placed on the model dirt-applied surface side of the test piece at an interval of 1 mm (stacked test piece) and used for the test. The weight of the test piece and the stainless steel plate (the test piece before application of the model dirt) used for producing the test piece are measured in advance.
[0036]
The laminated test piece was set at an angle of 45 ° at the same position at the bottom of the washing tank of an automatic jet washing apparatus DEKO-2000E (manufactured by Franke Finland). Washing was performed in a step of washing (with a detergent) for 5 minutes and rinsing with warm water for 3 minutes. In this device, the cleaning liquid is circulated and used by external transport by a pump. After rinsing, the laminated test piece was dried at 80 ° for 1 hour, and the weight of the test piece among the laminated test pieces was measured. From these weights before and after washing, the washing rate was calculated by the following formula, and the washing performance was evaluated.
[0037]
Washing rate (%) = 100 − [(W T1 −W S ) / (W T0 −W S ) × 100]
W T0 : Weight of test piece before cleaning (g)
W T1 : Weight of test piece after cleaning (g)
W S : Weight (g) of the stainless steel plate used for producing the test piece
[0038]
(2) Anti-scale adhesion property Using water having a German hardness of 8.0 ° and a detergent composition concentration of 0.2% by weight, an automatic jet type washing apparatus DEKO-2000E (manufactured by Franke Finland) is continuously used 20 times. After the operation (the object to be cleaned was not put in), the adhesion state of the scale in the cleaning tank was visually observed and evaluated according to the following criteria.
:: There is no scale adhesion.
Δ: Slight adhesion of scale is observed.
X: Scale adhesion is observed.
[0039]
(3) Storage stability The compositions in Table 1 were stored at 0 ° C. for one month or at 40 ° C. for one month, and the appearance was observed and evaluated according to the following criteria.
:: Uniformly dissolved, no change from before storage.
Δ: Slight crystal precipitation, turbidity, and separation were observed.
X: Crystal precipitation, generation of turbidity, and separation are clearly observed.
[0040]
[Table 1]
[0041]
In the table, Mw is the weight average molecular weight, and the washing concentration is the concentration of the liquid detergent composition (the composition concentration in the aqueous solution). In Comparative Examples 5 and 6, the weight ratio was calculated for convenience using Na glycolate and Na pyrophosphate as the component (C).
[0042]
As shown in Table 1, all of the compositions of the examples are excellent in storage stability, and excellent in cleaning properties and scale adhesion prevention properties. On the other hand, the compositions of Comparative Examples in which (A) / (B), (C) / (B), and (D) / (B) weight ratios are out of the range of the present invention have cleaning properties, anti-scale adhesion properties, Problems occur with any of the storage stability. Further, even when the weight ratio is within the range of the present invention as in Comparative Examples 5 and 6, when a compound that does not fall under the component (C) is used, the detergency tends to decrease, and the scale is reduced. The anti-adhesion property deteriorates. ,
[0043]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, the cleaning composition for medical instruments which shows the outstanding detergency with respect to medical instruments contaminated with bodily fluids such as blood, excreta, etc., has an excellent effect of preventing scale adhesion, and has good storage stability is provided. can get.
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009144070A (en) * | 2007-12-14 | 2009-07-02 | Kao Corp | Detergent composition for medical appliance |
JP2014102153A (en) * | 2012-11-20 | 2014-06-05 | Inuisyoji Corp | Cleaning evaluation extraction liquid for medical appliances and cleaning evaluation method for medical appliances using the same |
JP2016196593A (en) * | 2015-04-06 | 2016-11-24 | 株式会社Adeka | Concentrated liquid detergent composition for automatic dishwasher and method for washing tableware by automatic dishwasher |
JP2019035099A (en) * | 2018-11-27 | 2019-03-07 | 株式会社Adeka | Concentrated liquid detergent composition for automatic dishwasher and method for cleaning tableware by automatic dishwasher |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009144070A (en) * | 2007-12-14 | 2009-07-02 | Kao Corp | Detergent composition for medical appliance |
JP2014102153A (en) * | 2012-11-20 | 2014-06-05 | Inuisyoji Corp | Cleaning evaluation extraction liquid for medical appliances and cleaning evaluation method for medical appliances using the same |
JP2016196593A (en) * | 2015-04-06 | 2016-11-24 | 株式会社Adeka | Concentrated liquid detergent composition for automatic dishwasher and method for washing tableware by automatic dishwasher |
JP2019035099A (en) * | 2018-11-27 | 2019-03-07 | 株式会社Adeka | Concentrated liquid detergent composition for automatic dishwasher and method for cleaning tableware by automatic dishwasher |
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