JP4130378B2 - Disinfectant for medical equipment - Google Patents
Disinfectant for medical equipment Download PDFInfo
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- JP4130378B2 JP4130378B2 JP2003111340A JP2003111340A JP4130378B2 JP 4130378 B2 JP4130378 B2 JP 4130378B2 JP 2003111340 A JP2003111340 A JP 2003111340A JP 2003111340 A JP2003111340 A JP 2003111340A JP 4130378 B2 JP4130378 B2 JP 4130378B2
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Description
【0001】
【発明の属する技術分野】
本発明は、医療機器用殺菌洗浄剤に関する。特に好ましくは人工透析装置用殺菌洗浄剤に関する。
【0002】
【従来の技術】
人工透析は、半透膜を介し、患者の血液と透析液を間接的に接触させ、血液中の老廃物除去、塩濃度調整、水分除去を行う治療法である。
【0003】
人工透析装置や透析液配管には多様な汚れが付着する。例えば、水処理装置の不備やタンク等の開放部分から入り込む細菌、血液等由来の油脂、たんぱく汚れなどの他、炭酸カルシウムが付着する。
【0004】
炭酸カルシウムの付着は、透析液のpH調整剤として一般的に用いられる炭酸水素ナトリウムが、透析液成分として含まれるカルシウムイオンやマグネシウムイオンとの間で難溶性炭酸塩を形成するために起こる。炭酸カルシウムが配管の特に流れの滞留するような場所で沈殿として析出すると、細菌増殖の巣となったり、装置のトラブルを引き起こしたりする。
【0005】
これを防ぐ目的で、酸性水溶液によって配管を洗浄することが広く行われている。例えば酢酸やその他の有機酸が利用されている。しかしこれら有機酸による排水のBODは、一般的に1000〜7000ppmと高く、環境への悪影響が懸念され始めている。そのため析出した炭酸カルシウムを除去する洗浄剤も提案されている。
【0006】
特許文献1には、次亜塩素酸ナトリウム、水酸化アルカリ、陰イオン界面活性剤、並びに、重合リン酸塩及びアクリル酸塩より選ばれる少なくとも一種を含有する殺菌洗浄剤が開示されている。しかし人工透析液配管の場合、グラム陰性菌由来の内毒素であるエンドトキシンを除去するためのフィルターが配管途中に設けられることが多々あり、ほとんどの界面活性剤はこのフィルターに吸着されて、フィルターを詰まらせるため、エンドトキシン除去フィルターの設置されている人工透析液配管の洗浄剤には界面活性剤を配合しない方が好ましいことが知られている。また、重合リン酸塩やアクリル酸塩は、カルシウムイオンの溶解を助ける金属封鎖剤であるが、配合割合が最適化されていないため、酸性水溶液による配管洗浄を省略するまでには到っていない。
【0007】
また、特許文献2には、次亜塩素酸ナトリウムと金属封鎖剤とを含有する医療機器洗浄液用配合剤が開示されているが、これは、金属封鎖剤を含む洗浄液と次亜塩素酸ナトリウム水溶液を2剤に分けて貯蔵し、使用する時に2剤を混合するものであり、作業性が悪く、希釈して使うことを意図した濃厚な1剤型の状態での長期保存における問題の解決策とはならない。
【0008】
また、特許文献3には、次亜塩素酸ナトリウムとリン酸塩を含有する医療機器用消毒洗浄剤が開示されているが、その防錆性については、必ずしも満足できるものではない。
【0009】
【特許文献1】
特開平7−233396号公報
【特許文献2】
特開平9−31494号公報
【特許文献3】
特開2001−333977号公報
【0010】
【発明が解決しようとする課題】
本発明の課題は、エンドトキシン除去フィルターの設置されている人工透析液配管等への炭酸カルシウムの析出を抑制し、洗浄剤原体、特に洗浄剤原液の貯蔵安定性に優れ且つ防錆性に優れた、医療機器用、特に人工透析装置用の殺菌洗浄剤を提供することである。
【0011】
【課題を解決するための手段】
本発明は、(a)次亜塩素酸塩〔以下、(a)成分という〕、(b)重合リン酸塩〔以下、(b)成分という〕及び(c)珪酸塩〔以下、(c)成分という〕を含有し、(a)、(b)、及び(c)の比率が、(a)100重量部(有効塩素として)に対し、(b)15〜30重量部、(c)0.1〜2重量部である医療機器用殺菌洗浄剤に関する。
【0012】
【発明の実施の形態】
<(a)成分>
(a)成分の次亜塩素酸塩は、次亜塩素酸ナトリウム、次亜塩素酸カリウムが挙げられる。(a)成分の有効塩素は、被検液を精秤し、ヨウ化カリウムと酢酸水溶液を加え、直ちに密栓して暗所に15分間放置し、遊離するヨウ素を0.1mol/Lチオ硫酸ナトリウム水溶液で滴定し、(0.1mol/Lチオ硫酸ナトリウム水溶液1mL)=(3.5453mgCl)の式の関係より、次の(1)式で求めることができる。
【0013】
【数1】
【0014】
<(b)成分>
(b)成分の重合リン酸塩は、1分子中に少なくとも2個以上、好ましくは3個のリン原子を有する縮合リン酸の塩であり、塩としてはナトリウム塩やカリウム塩が挙げられる。具体的には、ピロリン酸ナトリウム、ピロリン酸カリウム、トリポリリン酸ナトリウム、トリポリリン酸カリウム、テトラポリリン酸ナトリウム、テトラポリリン酸カリウム、ペンタポリリン酸ナトリウム、ペンタポリリン酸カリウムが例示できる。好ましくは、トリポリリン酸ナトリウムである。
【0015】
本発明の殺菌洗浄剤において、(b)成分の比率は(a)成分100重量部(有効塩素として)に対し、15〜30重量部、好ましくは17〜20重量部である。この比率が15重量部以上であると炭酸カルシウムの長期にわたる析出抑制力が十分で、濁り(沈殿)も生じない。また、30重量部以下であると殺菌洗浄剤、更に濃厚原体、特に濃厚原液の貯蔵安定性が良好となる。通常、殺菌洗浄剤に濁りが生じると、機器に損傷を与え使用できなくなるため、本発明の効果は極めて有用である。
【0016】
<(c)成分>
(c)成分の珪酸塩は、珪酸ナトリウムや珪酸カリウムが挙げられ、オルソ珪酸ナトリウム、オルソ珪酸カリウム、メタ珪酸ナトリウム、メタ珪酸カリウム、1号珪酸ナトリウム、1号珪酸カリウム、2号珪酸ナトリウム、2号珪酸カリウム、3号珪酸ナトリウム、3号珪酸カリウムなどが使用できる。(c)成分は、オルソ珪酸ナトリウム、メタ珪酸ナトリウムなどのアルカリ性の比較的強いものが好ましい。
【0017】
本発明の殺菌洗浄剤において、(c)成分の比率は(a)成分100重量部(有効塩素として)に対し、0.1〜2重量部、好ましくは0.1〜0.5重量部である。この比率が0.1重量部以上であると充分な防錆効果が得られる。また、2重量部以下であると充分な防錆効果が得られ、また殺菌洗浄剤、更に濃厚原体、特に濃厚原液の貯蔵安定性も良好となる。
【0018】
<医療機器用殺菌洗浄剤>
本発明の殺菌洗浄剤は、固体でも液体でもよいが、液体の場合は、(a)成分を4〜8重量%(有効塩素として)、更に5〜8重量%(有効塩素として)、(b)成分を1.2〜2.5重量%、更に1.4〜2.0重量%、(c)成分を0.02〜0.2重量%、更に0.05〜0.15重量%含有することが好ましい。また、本発明の殺菌洗浄剤の残部は水が好ましい。
【0019】
本発明の殺菌洗浄剤は、液体の場合、通常、上記濃度で調製された原液を50〜250倍に水で希釈して使用される。
【0020】
また、本発明の殺菌洗浄剤には、(b)成分、(c)成分以外にも、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、硝酸塩、エチレンジアミンテトラ(メチレンホスホン酸)及びその塩、ジエチレントリアミンペンタ(メチレンホスホン酸)及びその塩等の金属腐蝕防止剤を併用してもよい。
【0021】
なお、界面活性剤については、本発明の効果を損なわない範囲で含有することもできるが、エンドトキシン除去フィルターの設置されている配管に適用する場合は含有しないことが好ましい。
【0022】
本発明の殺菌洗浄剤の対象となる医療機器としては、人工透析装置(その周辺機器等を含む)、内視鏡及び生検鉗子等の内視鏡用器具等の他、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、カート等が挙げられる。特に、本発明の殺菌洗浄剤は、人工透析装置用として好適である。
【0023】
【発明の効果】
本発明の殺菌洗浄剤は、炭酸カルシウムの析出を抑制でき、また、原体、特に原液を長期保存しても有効塩素残存率が高く、濁りが発生せず、更に防錆性にも優れる。
【0024】
また、安定な一剤型とできるので、病院等での使用が煩雑にならず、作業性の点から好ましいものである。
【0025】
本発明の殺菌洗浄剤は、各種医療機器、特に、人工透析装置及び配管の汚れを効率的に除去でき、従来品に比べ、酸洗浄の頻度あるいは酸濃度を確実に低下させることが可能となる。
【0026】
【実施例】
実施例1
(1)殺菌洗浄剤原液の調製
表1の比率で(a)〜(c)成分を配合し、殺菌洗浄剤原液を調製した。次亜塩素酸ナトリウムは南海化学工業製の低食塩品を、トリポリリン酸ナトリウムは下関三井化学製を、メタ珪酸ナトリウムは広栄化学工業製のメタ珪酸ソーダ・五水塩を用いた。
【0027】
【表1】
【0028】
(2)炭酸カルシウムの析出抑制評価
表1の殺菌洗浄剤原液を100倍希釈して洗浄液を調製した。この洗浄液125gと透析液(扶桑薬品工業(株)製、キンダリーAF1号を用いて調製)2375gを混合(洗浄液:透析液=5:95、重量比)し、4つの重量既知の500mlガラスビーカーに、各々500gを秤り取った。ラップフィルムで水分の蒸発を防ぎ、23〜25℃で静置した。1週間毎に4週間までの間、混合液をデカンテーションにより除去し、乾燥後に沈殿物の重量を求めた。結果を表2に示す。なお、次亜塩素酸ナトリウム単独の洗浄液の有効塩素濃度は750ppmに調整した。また、表2の結果をグラフにしたものを図1に示した。
【0029】
【表2】
【0030】
本発明品1〜3及び比較品2は、沈殿物の発生を有意に抑えたが、比較例1は3週間以降、急激に沈殿物が増加した(ただし、比較品2は、後述のように貯蔵安定性は悪いものとなる)。また、次亜塩素酸ナトリウム単独の場合は、理論的に発生する沈殿量に近い結果となった。
【0031】
(3)貯蔵安定性の評価
表1の殺菌洗浄剤原液を40℃で貯蔵し、経時的な有効塩素濃度の低下を調べた。有効塩素残存率は、初期有効塩素濃度に対する所定期間経過時の有効塩素濃度の比率である。なお、次亜塩素酸ナトリウム単独の初期有効塩素は7.5重量%とした。また、その際の原液の濁り発生の有無を判定し、以下の基準で評価した。ここで、濁りとは、底に沈殿物が認められたものを意味する。
【0032】
濁り発生の有無
○:濁り無し
×:濁り発生
【0033】
【表3】
【0034】
本発明品は、長期の炭酸カルシウム析出抑制力を有し、かつ原液の貯蔵安定性も良好であった。比較品2は、濁りが発生し、安定性が悪かった。
【0035】
(4)防錆性の評価
表1の殺菌洗浄剤原液を4倍希釈した洗浄液に、ステンレスSUS304製板を浸漬し、40℃で7日間放置して金属への影響を調査した。SUS304製板のサイズは、縦9.5cm×横1.5cm×厚み0.25cmであった。結果を表4に示す。
【0036】
【表4】
【0037】
珪酸塩を配合した本発明品は、ステンレスSUS304への次亜塩素酸塩による腐食を防止できた。
【0038】
(5)殺菌力の評価
実施例1の殺菌洗浄剤原液を100倍希釈した液を用いて、細菌などの微生物に対する作用を試験した。
【0039】
微生物として、(I)一般細菌である黄色ぶどう球菌(Staphylococcus aureus IFO12732)、大腸菌(Escherichia coli IFO3972)、緑膿菌(Pseudomonas aeru ginosa IFO 12689)、(II)細菌芽胞として枯草菌(Bacillus subtilis ATCC 6633)、セレウス菌(Bacillus cereus IFO13494)、(III)真菌胞子である黒色麹菌(Aspergillus niger ATCC 9642)を用いた。
【0040】
SCD寒天培地に前培養した菌を滅菌水に懸濁し、約107〜108cell/mLの菌液を調製した。枯草菌とセレウス菌は遠心分離洗浄後、65℃、30分の熱処理を加え、芽胞菌のみを試験に用いた。調製した菌液50μLを100倍希釈洗浄液200μLに加え、25℃において表2に示す所定の接触時間後、SCD培地(不活化剤としてチオ硫酸ナトリウム3%添加)に20μLを移し、35℃で2日間培養して菌の生育を観察した。結果を表5に示す。表5中「−」は菌の生育なし、「+」は菌の生育あり、を意味する。
【0041】
【表5】
【0042】
透析装置の除菌洗浄では、一般的に、少なくとも30分は殺菌洗浄剤を接触させている現状から、本発明品1は充分な殺菌性能を有するものと判断できる。
【図面の簡単な説明】
【図1】実施例1における炭酸カルシウムの析出抑制試験の結果を示すグラフ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sterilizing cleaning agent for medical equipment. Particularly preferably, the present invention relates to a sterilizing detergent for an artificial dialysis machine.
[0002]
[Prior art]
Artificial dialysis is a treatment method in which the patient's blood and dialysate are indirectly contacted via a semipermeable membrane to remove waste products in the blood, adjust salt concentration, and remove water.
[0003]
Various stains adhere to the artificial dialyzer and dialysate piping. For example, calcium carbonate adheres in addition to deficiencies in water treatment devices, bacteria entering from open parts of tanks, oils and fats derived from blood, protein stains, and the like.
[0004]
The adhesion of calcium carbonate occurs because sodium hydrogen carbonate, which is generally used as a pH adjuster for dialysate, forms a hardly soluble carbonate with calcium ions and magnesium ions contained as dialysate components. If calcium carbonate is deposited as a precipitate in a place where the flow stays in the piping, it may become a nest for bacterial growth or cause troubles in the device.
[0005]
In order to prevent this, it is widely practiced to wash the piping with an acidic aqueous solution. For example, acetic acid and other organic acids are used. However, the BOD of wastewater from these organic acids is generally as high as 1000 to 7000 ppm, and there is a concern about adverse environmental effects. Therefore, a cleaning agent that removes the precipitated calcium carbonate has also been proposed.
[0006]
Patent Document 1 discloses a sterilizing detergent containing at least one selected from sodium hypochlorite, alkali hydroxide, anionic surfactant, and polymerized phosphate and acrylate. However, in the case of artificial dialysate piping, a filter for removing endotoxin, which is an endotoxin derived from gram-negative bacteria, is often provided in the middle of the piping, and most of the surfactant is adsorbed on this filter. In order to clog, it is known that it is preferable not to add a surfactant to the detergent of the artificial dialysate pipe where the endotoxin removal filter is installed. Polymerized phosphates and acrylates are sequestering agents that help dissolve calcium ions, but because the blending ratio has not been optimized, pipe cleaning with an acidic aqueous solution has not been omitted. .
[0007]
Patent Document 2 discloses a compounding agent for a medical device cleaning liquid containing sodium hypochlorite and a metal sequestering agent, which includes a cleaning liquid containing a metal sequestering agent and a sodium hypochlorite aqueous solution. The solution is divided into two parts, and the two parts are mixed at the time of use. The workability is poor, and the solution to the problem of long-term storage in a concentrated one-part type intended to be used diluted. It will not be.
[0008]
Further, Patent Document 3 discloses a disinfectant cleaning agent for medical equipment containing sodium hypochlorite and phosphate, but its rust prevention property is not always satisfactory.
[0009]
[Patent Document 1]
JP-A-7-233396 [Patent Document 2]
JP-A-9-31494 [Patent Document 3]
JP 2001-333977 A [0010]
[Problems to be solved by the invention]
An object of the present invention is to suppress the precipitation of calcium carbonate on an artificial dialysate pipe or the like where an endotoxin removal filter is installed, and is excellent in storage stability of the cleaning agent stock, in particular, in the cleaning agent stock solution and excellent in rust prevention. Another object of the present invention is to provide a sterilizing detergent for medical equipment, particularly for an artificial dialysis machine.
[0011]
[Means for Solving the Problems]
The present invention comprises (a) hypochlorite [hereinafter referred to as component (a)], (b) polymerized phosphate (hereinafter referred to as component (b)) and (c) silicate [hereinafter referred to as (c). The ratio of (a), (b), and (c) to (a) 100 parts by weight (as effective chlorine), (b) 15 to 30 parts by weight, (c) 0 The present invention relates to a sterilizing cleaning agent for medical equipment that is 1 to 2 parts by weight.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
<(A) component>
Examples of the hypochlorite as the component (a) include sodium hypochlorite and potassium hypochlorite. The effective chlorine of component (a) is prepared by accurately weighing the test solution, adding potassium iodide and an acetic acid aqueous solution, immediately sealing it and leaving it in the dark for 15 minutes, and freeing iodine by 0.1 mol / L sodium thiosulfate. Titration with an aqueous solution can be carried out by the following equation (1) from the relationship of the equation (0.1 mol / L aqueous sodium thiosulfate solution 1 mL) = (3.5453 mgCl).
[0013]
[Expression 1]
[0014]
<(B) component>
The polymerized phosphate of component (b) is a salt of condensed phosphoric acid having at least 2 and preferably 3 phosphorus atoms in one molecule, and examples of the salt include sodium salt and potassium salt. Specific examples include sodium pyrophosphate, potassium pyrophosphate, sodium tripolyphosphate, potassium tripolyphosphate, sodium tetrapolyphosphate, potassium tetrapolyphosphate, sodium pentapolyphosphate, and potassium polypolyphosphate. Preferably, it is sodium tripolyphosphate.
[0015]
In the sterilizing and cleaning agent of the present invention, the ratio of the component (b) is 15 to 30 parts by weight, preferably 17 to 20 parts by weight with respect to 100 parts by weight (as effective chlorine) of the component (a). When this ratio is 15 parts by weight or more, the calcium carbonate has a sufficient ability to suppress precipitation over a long period of time, and turbidity (precipitation) does not occur. On the other hand, when the amount is 30 parts by weight or less, the storage stability of the sterilizing detergent and the concentrated raw material, particularly the concentrated stock solution is improved. Usually, when the sterilization cleaning agent becomes turbid, the device is damaged and cannot be used, so the effect of the present invention is extremely useful.
[0016]
<(C) component>
Examples of the silicate of component (c) include sodium silicate and potassium silicate. Sodium orthosilicate, potassium orthosilicate, sodium metasilicate, potassium metasilicate, No. 1 sodium silicate, No. 1 potassium silicate, No. 2 sodium silicate, 2 No. 3 potassium silicate, No. 3 sodium silicate, No. 3 potassium silicate, etc. can be used. As the component (c), those having relatively strong alkalinity such as sodium orthosilicate and sodium metasilicate are preferable.
[0017]
In the disinfectant cleaning agent of the present invention, the ratio of the component (c) is 0.1 to 2 parts by weight, preferably 0.1 to 0.5 parts by weight with respect to 100 parts by weight (as effective chlorine) of the component (a). is there. When this ratio is 0.1 parts by weight or more, a sufficient antirust effect can be obtained. Further, when the amount is 2 parts by weight or less, a sufficient rust prevention effect is obtained, and the storage stability of the sterilizing detergent, the concentrated original material, particularly the concentrated stock solution is also improved.
[0018]
<Disinfectant for medical equipment>
The sterilizing and cleaning agent of the present invention may be solid or liquid, but in the case of liquid, the component (a) is 4 to 8% by weight (as effective chlorine), further 5 to 8% by weight (as effective chlorine), (b Component) 1.2-2.5% by weight, further 1.4-2.0% by weight, component (c) 0.02-0.2% by weight, further 0.05-0.15% by weight It is preferable to do. The balance of the sterilizing detergent of the present invention is preferably water.
[0019]
In the case of a liquid, the sterilizing cleaning agent of the present invention is usually used by diluting a stock solution prepared at the above concentration 50 to 250 times with water.
[0020]
In addition to the components (b) and (c), the sterilizing detergent of the present invention includes aminotri (methylenephosphonic acid) and its salt, 1-hydroxyethylidene-1,1-diphosphonic acid and its salt, and nitrate. Further, metal corrosion inhibitors such as ethylenediaminetetra (methylenephosphonic acid) and its salt, diethylenetriaminepenta (methylenephosphonic acid) and its salt may be used in combination.
[0021]
In addition, about surfactant, it can also contain in the range which does not impair the effect of this invention, However, When applying to the piping in which the endotoxin removal filter is installed, it is preferable not to contain.
[0022]
Examples of the medical device that is the target of the sterilizing and cleaning agent of the present invention include an artificial dialysis device (including peripheral devices thereof), an endoscopic instrument such as an endoscope and a biopsy forceps, a scissors, and tweezers. , Forceps, needle holder, colposcope, retractor, serpentine tube, tube, catheter, cart and the like. In particular, the sterilizing detergent of the present invention is suitable for an artificial dialysis machine.
[0023]
【The invention's effect】
The sterilizing and cleaning agent of the present invention can suppress the precipitation of calcium carbonate, and even if the raw material, particularly the stock solution, is stored for a long period of time, the effective chlorine residual rate is high, no turbidity is generated, and rust prevention is also excellent.
[0024]
In addition, since it can be a stable one-pack type, it is not complicated to use in a hospital or the like and is preferable from the viewpoint of workability.
[0025]
The sterilizing and cleaning agent of the present invention can efficiently remove stains on various medical devices, in particular, artificial dialysis equipment and piping, and can reliably reduce the frequency of acid cleaning or the acid concentration compared to conventional products. .
[0026]
【Example】
Example 1
(1) Preparation of sterilizing detergent stock solution Components (a) to (c) were blended in the ratios shown in Table 1 to prepare a sterilizing detergent stock solution. Sodium hypochlorite was a low salt product manufactured by Nankai Chemical Industry, sodium tripolyphosphate was manufactured by Shimonoseki Mitsui Chemicals, and sodium metasilicate sodium metasilicate sodium pentahydrate manufactured by Guangei Chemical Industry was used.
[0027]
[Table 1]
[0028]
(2) Calcium carbonate precipitation inhibition evaluation The sterilizing detergent stock solution in Table 1 was diluted 100 times to prepare a washing solution. 125 g of this washing solution and 2375 g of dialysate (manufactured by Fuso Yakuhin Kogyo Co., Ltd., prepared using Kindaly AF1) were mixed (washing solution: dialysate = 5: 95, weight ratio) and mixed into four 500 ml glass beakers of known weight Each 500 g was weighed. The wrap film prevented water from evaporating and allowed to stand at 23 to 25 ° C. The mixed solution was removed by decantation every week for up to 4 weeks, and the weight of the precipitate was determined after drying. The results are shown in Table 2. Note that the effective chlorine concentration of the cleaning solution containing sodium hypochlorite alone was adjusted to 750 ppm. Moreover, what made the result of Table 2 into a graph was shown in FIG.
[0029]
[Table 2]
[0030]
Inventive products 1 to 3 and comparative product 2 significantly suppressed the occurrence of precipitates, but in Comparative Example 1, the precipitate increased rapidly after 3 weeks (however, comparative product 2 was as described below. Storage stability is bad). In the case of sodium hypochlorite alone, the result was close to the theoretically generated precipitation amount.
[0031]
(3) Evaluation of storage stability The stock solution of the sterilizing detergent shown in Table 1 was stored at 40 ° C., and the decrease in effective chlorine concentration over time was examined. The effective chlorine residual rate is a ratio of the effective chlorine concentration at the time when a predetermined period has elapsed with respect to the initial effective chlorine concentration. The initial effective chlorine of sodium hypochlorite alone was 7.5% by weight. Moreover, the presence or absence of the turbidity generation | occurrence | production of the undiluted | stock solution in that case was determined, and the following reference | standard evaluated. Here, turbidity means that a sediment is observed at the bottom.
[0032]
Presence or absence of turbidity ○: No turbidity ×: Occurrence of turbidity [0033]
[Table 3]
[0034]
The product of the present invention had a long-term calcium carbonate precipitation inhibitory property and also had good storage stability of the stock solution. Comparative product 2 was turbid and unstable.
[0035]
(4) Evaluation of rust prevention property A stainless steel SUS304 plate was immersed in a cleaning solution obtained by diluting the sterilizing detergent stock solution in Table 1 four times, and the plate was left at 40 ° C. for 7 days to investigate the influence on the metal. The size of the SUS304 plate was 9.5 cm long x 1.5 cm wide x 0.25 cm thick. The results are shown in Table 4.
[0036]
[Table 4]
[0037]
The product of the present invention containing silicate was able to prevent corrosion by hypochlorite to stainless steel SUS304.
[0038]
(5) Evaluation of bactericidal activity Using a solution obtained by diluting the sterilizing detergent stock solution of Example 1 100 times, the effect on microorganisms such as bacteria was tested.
[0039]
As microorganisms Staphylococcus aureus (Staphylococcus aureus IFO12732) a (I) common bacteria, Escherichia coli (Escherichia coli IFO3972), Pseudomonas aeruginosa (Pseudomonas aeru ginosa IFO 12689), Bacillus subtilis as (II) bacterial spores (Bacillus subtilis ATCC 6633 ), Bacillus cereus IFO 13494, and (III) Aspergillus niger ATCC 9642, which is a fungal spore.
[0040]
The bacteria pre-cultured on the SCD agar medium were suspended in sterilized water to prepare a bacterial solution of about 10 7 to 10 8 cells / mL. Bacillus subtilis and Bacillus cereus were centrifuged and washed, then heat treated at 65 ° C. for 30 minutes, and only spore bacteria were used in the test. 50 μL of the prepared bacterial solution is added to 200 μL of a 100-fold diluted washing solution, and after a predetermined contact time shown in Table 2 at 25 ° C., 20 μL is transferred to SCD medium (added with 3% sodium thiosulfate as an inactivating agent). The culture was observed for days, and the growth of the bacteria was observed. The results are shown in Table 5. In Table 5, “−” means that no fungus has grown, and “+” means that fungus has grown.
[0041]
[Table 5]
[0042]
In the sterilization cleaning of a dialysis apparatus, it can be determined that the product 1 of the present invention has sufficient sterilization performance from the present situation that a sterilization detergent is generally contacted for at least 30 minutes.
[Brief description of the drawings]
1 is a graph showing the results of a calcium carbonate precipitation inhibition test in Example 1. FIG.
Claims (5)
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JP2003111340A JP4130378B2 (en) | 2003-04-16 | 2003-04-16 | Disinfectant for medical equipment |
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JP2003111340A JP4130378B2 (en) | 2003-04-16 | 2003-04-16 | Disinfectant for medical equipment |
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EP1829449A4 (en) * | 2004-11-24 | 2008-10-08 | Maruishi Pharma | Hypochlorous acid based sterilizer composition |
JP4400790B2 (en) * | 2005-04-04 | 2010-01-20 | 日機装株式会社 | Hemodialysis system |
JP2011016757A (en) * | 2009-07-09 | 2011-01-27 | Bee Brand Medico Dental Co Ltd | Disinfectant detergent |
JP7222513B2 (en) * | 2018-07-18 | 2023-02-15 | 株式会社ニイタカ | HARD SURFACE DETERGENT COMPOSITION, METHOD FOR ELIMINATING MICROORGANISMS OR BACTERIA CLAGGEMENTS, METHOD FOR PREVENTING PRODUCTION OF BACTERIA CLAGUE IN WASHING MACHINE, METHOD FOR CLEANING ARTICLES HAVING HARD SURFACES WITH WASHING MACHINE, AND DISINFECTANT |
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