[摘要]"目的"觀察次溴酸對(duì)口腔綜合治療臺(tái)水路系統(tǒng)(dental"unit"waterlines,DUWLs)的消毒效果。方法"選取醫(yī)院DUWLs,包括三用噴槍、牙科手機(jī)、水杯注水器各20臺(tái),將3種設(shè)備以1~20編號(hào)排列,1~10號(hào)設(shè)備納入實(shí)驗(yàn)組,11~20號(hào)設(shè)備納入對(duì)照組。對(duì)照組不進(jìn)行DUWLs消毒,實(shí)驗(yàn)組使用次溴酸消毒。分別于每日診療前,沖洗3min后進(jìn)行水樣檢測(cè),采集時(shí)間為第0、1、2、3、4、5、8、10、15、20、25、30天,共采樣12次。構(gòu)建廣義估計(jì)方程,比較兩組不同時(shí)點(diǎn)手機(jī)插口部位,水杯出水部位,三用槍插口部位菌落計(jì)數(shù);比較DUWLs水樣合格率。結(jié)果"構(gòu)建廣義估計(jì)方程,對(duì)兩組手機(jī)插口部位,水杯出水部位,三用槍插口部位菌落計(jì)數(shù)進(jìn)行截距、組別、時(shí)點(diǎn)、組別×?xí)r點(diǎn)的固定效應(yīng)的顯著性檢驗(yàn),兩組數(shù)據(jù)在不同時(shí)點(diǎn)間變化差異有統(tǒng)計(jì)學(xué)意義(Plt;0.05)。兩組首次開診前實(shí)驗(yàn)組三用槍插口部位菌落計(jì)數(shù)較對(duì)照組多16"800,差異有統(tǒng)計(jì)學(xué)意義(Plt;0.05);對(duì)照組第30天時(shí)菌落計(jì)數(shù)較首次開診前減少29"000;實(shí)驗(yàn)組第30天時(shí)菌落計(jì)數(shù)減少量較對(duì)照組多35"250,差異有統(tǒng)計(jì)學(xué)意義(Plt;0.05)。兩組首次開診前兩組手機(jī)插口部位菌落計(jì)數(shù)差異無統(tǒng)計(jì)學(xué)意義(Pgt;0.05);對(duì)照組第30天時(shí)菌落計(jì)數(shù)較首次開診前減少86"900;實(shí)驗(yàn)組第30天時(shí)菌落計(jì)數(shù)減少量較對(duì)照組多16"350,差異無統(tǒng)計(jì)學(xué)意義(Pgt;0.05)。兩組首次開診前水杯出水部位菌落計(jì)數(shù)比較差異無統(tǒng)計(jì)學(xué)意義(Pgt;0.05);對(duì)照組第30天時(shí)菌落計(jì)數(shù)較首次開診前減少25"550;實(shí)驗(yàn)組第30天時(shí)菌落計(jì)數(shù)減少量較對(duì)照組多11"800,差異有統(tǒng)計(jì)學(xué)意義(Plt;0.05)。實(shí)驗(yàn)組診療前、沖洗3min后手機(jī)插口部位,水杯出水部位,三用槍插口部位合格率均高于對(duì)照組,差異有統(tǒng)計(jì)學(xué)意義(Plt;0.05)。結(jié)論"使用次溴酸進(jìn)行DUWLs消毒能夠減少菌落計(jì)數(shù),提高水樣合格率。
[關(guān)鍵詞]"口腔綜合治療臺(tái)水路系統(tǒng);次溴酸;消毒效果
[中圖分類號(hào)]"R187""""""[文獻(xiàn)標(biāo)識(shí)碼]"A""""""[DOI]"10.3969/j.issn.1673-9701.2024.14.007
Study"on"the"disinfection"effect"of"hypobromic"acid"on"the"waterway"system"of"oral"comprehensive"treatment"table
XIONG"Peiwen,"CAI"Jian
The"Affiliated"Stomatological"Hospital"of"Nanchang"University,"The"Key"Laboratory"of"Oral"Biomedicine"Jiangxi"Province,"Jiangxi"Province"Clinical"Research"Center"for"Oral"Diseases,"Nanchang"330008,"Jiangxi,"China
[Abstract]"Objective"To"observe"the"disinfection"effect"of"hypobromic"acid"on"the"oral"comprehensive"treatment"table"water"system"(DUWLs)."Methods"The"research"equipment"was"selected"from"hospital"DUWLs,"including"20"sets"of"three"purpose"spray"guns,"dental"mobile"phones,"and"water"cup"injectors."The"three"types"of"equipment"were"arranged"in"numbers"1-20,"with"devices"1-10"included"in"the"experimental"group"and"devices"11-20"included"in"the"control"group."The"control"group"was"not"disinfected"with"DUWLs,"while"the"experimental"group"was"disinfected"with"hypobromic"acid."Before"daily"diagnosis"and"treatment,"water"samples"were"collected"for"3"minutes"after"rinsing."The"collection"time"was"on"the"0th,"1st,"2nd,"3rd,"4th,"5th,"8th,"10th,"15th,"20th,"25th,"and"30th"days,"with"a"total"of"12"samples"taken."The"generalized"estimation"equation"was"constructed"to"compare"the"colony"count"of"the"cell"phone"jack,"the"water"cup"outlet"and"the"three"gun"sockets"of"the"two"groups"at"different"time"points."The"qualified"rate"of"DUWLs"water"samples"was"compared."Results"The"generalized"estimation"equation"was"constructed"to"test"the"significance"of"the"fixed"effect"of"intercept,"group,"time"point,"group"time"point"for"the"bacterial"count"of"the"two"groups"of"mobile"phone"jack"parts,"the"water"cup"outlet"parts"and"the"three"gun"jack"parts."The"variation"difference"between"the"two"groups"of"data"at"different"time"points"was"statistically"significant"(Plt;0.05)."Before"the"first"treatment,"the"number"of"colonies"in"the"experimental"group"was"16"800"more"than"that"in"the"control"group"(Plt;0.05)."On"the"30th"day,"the"bacterial"count"in"the"control"group"decreased"by"29"000"compared"to"before"the"first"consultation."On"the"30th"day,"the"decrease"in"bacterial"count"in"the"experimental"group"was"35"250"more"than"that"in"the"control"group"(Plt;0.05)."There"was"no"statistical"significant"difference"in"the"number"of"colonies"at"the"cell"phone"socket"between"the"two"groups"before"the"first"diagnosis"(Pgt;0.05)."On"the"30th"day,"the"bacterial"count"in"the"control"group"decreased"by"86"900"compared"to"before"the"first"consultation."On"the"30th"day,"the"decrease"in"bacterial"count"in"the"experimental"group"was"16"350"more"than"that"in"the"control"group"(Pgt;0.05)."There"was"no"statistical"significant"difference"between"the"two"groups"in"the"number"of"colonies"in"the"outlet"of"the"water"cup"before"the"first"diagnosis"(Pgt;0.05)."On"the"30th"day,"the"bacterial"count"in"the"control"group"decreased"by"25"550"compared"to"before"the"first"consultation."On"the"30th"day,"the"decrease"in"bacterial"count"in"the"experimental"group"was"11"800"more"than"that"in"the"control"group"(Plt;0.05)."The"pass"rate"of"mobile"phone"jack,"water"cup"outlet"and"gun"jack"in"the"experimental"group"was"higher"than"that"in"the"control"group"before"diagnosis"and"treatment"and"after"rinsing"for"3"minutes,"and"the"difference"was"statistically"significant"(Plt;0.05)."Conclusion"Using"hypobromic"acid"for"DUWLs"disinfection"can"reduce"bacterial"count"and"improve"the"qualified"rate"of"water"samples.
[Key"words]"Oral"comprehensive"treatment"table"waterway"system;"Hypobromic"acid;"Disinfection"effect
口腔科是醫(yī)院感染的高??剖?,牙科手機(jī)、噴槍等醫(yī)療器械的滅菌效果對(duì)院內(nèi)感染造成極大影響[1]??谇痪C合治療臺(tái)水路系統(tǒng)(dental"unit"waterlines,DUWLs)是牙科手機(jī)、三用噴槍等醫(yī)療器械供水的附屬設(shè)備,所集成的水、電、氣等復(fù)雜系統(tǒng)中的重要配套裝置,能夠?yàn)槠餍堤峁┓现委煒?biāo)準(zhǔn)的用水。但DUWLs的污染是各級(jí)醫(yī)院普遍存在問題。近年來國(guó)內(nèi)一項(xiàng)針對(duì)60所三級(jí)醫(yī)院的調(diào)查發(fā)現(xiàn),DUWLs中牙科手機(jī)水樣合格率為15.00%,潔牙機(jī)水樣合格率為18%[2]。錢清等[3]調(diào)查中也發(fā)現(xiàn),39所醫(yī)療機(jī)構(gòu)中,1153份DUWLs水樣檢測(cè),合格率為43.5%。上述研究數(shù)據(jù)均表明,我國(guó)DUWLs現(xiàn)存嚴(yán)重污染問題,提高DUWLs消毒效率十分必要。目前關(guān)于DUWLs清潔已提出過氧化氫、蒸餾水、含氯消毒液等化學(xué)消毒殺菌方式,國(guó)內(nèi)外應(yīng)用現(xiàn)狀尚未統(tǒng)一,實(shí)際應(yīng)用中仍發(fā)現(xiàn)水樣不達(dá)標(biāo)或長(zhǎng)期應(yīng)用導(dǎo)致設(shè)備腐蝕情況。含溴消毒劑是指溶于水后,能夠水解成次溴酸,并發(fā)揮殺菌作用的一類消毒劑[4]。次溴酸是一種不穩(wěn)定的弱酸、無色到淡黃色的溶液,具有強(qiáng)氧化和殺菌作用,天然存在生命體內(nèi),可由免疫系統(tǒng)自發(fā)產(chǎn)生,具有一定安全性[5]。目前關(guān)于次溴酸在醫(yī)療行業(yè)中的應(yīng)用仍未普及,且尚無研究將其用于口腔科殺菌消毒中??紤]其具有殺菌活性及安全性,本研究將次溴酸用于DUWLs消毒中,證實(shí)其在口腔科的實(shí)際應(yīng)用價(jià)值。
1""材料與方法
1.1""研究設(shè)備
研究設(shè)備選取醫(yī)院DUWLs,包括三用噴槍、牙科手機(jī)、水杯注水器各20臺(tái),將3種設(shè)備以1~20編號(hào)排列,1~10號(hào)設(shè)備納入實(shí)驗(yàn)組,11~20號(hào)設(shè)備納入對(duì)照組。納入標(biāo)準(zhǔn):①同一批次使用的椅位,使用了2年的牙椅;②接入的手機(jī)、三用槍等在同一消毒供應(yīng)室消毒殺菌;③設(shè)備均在使用期限內(nèi),功能可正常使用。排除標(biāo)準(zhǔn):①設(shè)備發(fā)生磨損、腐蝕等破損;②未根據(jù)院內(nèi)規(guī)定使用或擺放設(shè)備。
1.2""研究方法
實(shí)驗(yàn)組使用次溴酸清潔:使用溴代聚苯乙烯海因樹脂濾芯(衡水諾盾凈水設(shè)備有限公司),在設(shè)備進(jìn)水口接入海羅凈溴樹脂濾芯,濾芯穩(wěn)定釋放次溴酸溶液(濃度為1ppm),對(duì)管路完成消毒殺菌。對(duì)照組在設(shè)備進(jìn)水口接入不含溴代聚苯乙烯海因樹脂的濾芯。
1.3""采樣檢測(cè)及評(píng)估標(biāo)準(zhǔn)
每日診療使用前,沖洗3min后采集15ml水樣送檢,采集時(shí)間為第0、1、2、3、4、5、8、10、15、20、25、30天,共采樣12d。根據(jù)GB"5749-2006《生活飲用水衛(wèi)生標(biāo)準(zhǔn)》[6],以DUWLs診療用水菌落數(shù)≤100CFU/mL評(píng)估為DUWLs水質(zhì)合格。水質(zhì)合格率(%)=(檢測(cè)樣本總數(shù)–不合格樣本數(shù)量)/檢測(cè)樣本總數(shù)×100%。
1.4""統(tǒng)計(jì)學(xué)方法
采用SPSS"25.0統(tǒng)計(jì)學(xué)軟件對(duì)數(shù)據(jù)進(jìn)行處理分析,計(jì)數(shù)資料采用例數(shù)(百分率)[n(%)]表示,采用χ2檢驗(yàn);采用廣義估計(jì)方程,分析兩組手機(jī)插口部位,水杯出水部位,三用槍插口部位不同時(shí)點(diǎn)菌落計(jì)數(shù)的動(dòng)態(tài)變化,Plt;0.05為差異有統(tǒng)計(jì)學(xué)意義;采用GraphPad"Prism"8.0軟件繪制不同時(shí)點(diǎn)開診前、沖洗3min后菌落計(jì)數(shù)變化趨勢(shì)圖。
2""結(jié)果
2.1""菌落計(jì)數(shù)的廣義估計(jì)方程固定效應(yīng)檢驗(yàn)
兩組第0、1、2、3、4、5、8、10、15、20、25、30天設(shè)備診療使用前,每日沖洗3min后菌落計(jì)數(shù)變化曲線見圖1。構(gòu)建廣義估計(jì)方程,對(duì)兩組手機(jī)插口部位,水杯出水部位,三用槍插口部位菌落計(jì)數(shù)進(jìn)行截距、組別、時(shí)點(diǎn)、組別×?xí)r點(diǎn)的固定效應(yīng)檢驗(yàn),兩組數(shù)據(jù)在不同時(shí)點(diǎn)間變化差異有統(tǒng)計(jì)學(xué)意義(Plt;0.05)。
2.2""菌落計(jì)數(shù)的廣義估計(jì)方程分析
2.2.1""三用槍插口部位菌落計(jì)數(shù)""構(gòu)建廣義估計(jì)方程,實(shí)驗(yàn)組B=1680.00,Plt;0.05,表明首次開診前實(shí)驗(yàn)組三用槍插口部位菌落計(jì)數(shù)較對(duì)照組多16"800;對(duì)照組第30天時(shí)B=–2900,對(duì)照組第30天時(shí)菌落計(jì)數(shù)較首次開診前減少29"000;實(shí)驗(yàn)組第30天時(shí)B=–3525.00,表明實(shí)驗(yàn)組第30天時(shí)菌落計(jì)數(shù)減少量較對(duì)照組多35"250。
2.2.2""手機(jī)插口部位菌落計(jì)數(shù)""構(gòu)建廣義估計(jì)方程,實(shí)驗(yàn)組B=35.00,Pgt;0.05,表明首次開診前兩組手機(jī)插口部位菌落計(jì)數(shù)差異無統(tǒng)計(jì)學(xué)意義;對(duì)照組第30天時(shí)B=-8690,表明對(duì)照組第30天時(shí)菌落計(jì)數(shù)較首次開診前減少86"900;實(shí)驗(yàn)組第30天時(shí)B=-1635,表明實(shí)驗(yàn)組第30天時(shí)菌落計(jì)數(shù)減少量較對(duì)照組多16"350。
2.2.3""水杯出水部位菌落計(jì)數(shù)的廣義估計(jì)方程分析""構(gòu)建廣義估計(jì)方程,實(shí)驗(yàn)組B=585.00,Pgt;0.05,表明首次開診前兩組水杯出水部位菌落計(jì)數(shù)差異無統(tǒng)計(jì)學(xué)意義;對(duì)照組第30天時(shí)B=-2555.00,表明對(duì)照組第30天時(shí)菌落計(jì)數(shù)較首次開診前減少25"550;實(shí)驗(yàn)組第30天時(shí)B=-1180.00,表明實(shí)驗(yàn)組第30天時(shí)菌落計(jì)數(shù)減少量較對(duì)照組多11"800。參數(shù)估計(jì)值見表1。
2.3""水樣合格率比較
實(shí)驗(yàn)組診療前、沖洗3min后三用槍插口部位、手機(jī)插口部位、水杯出水部位合格率均高于對(duì)照組,差異有統(tǒng)計(jì)學(xué)意義(Plt;0.05)。見表2。
3""討論
DUWLs污染是導(dǎo)致院內(nèi)感染的重要原因,在口腔疾病診療過程中,DUWLs中微生物及內(nèi)毒素能夠通過水流進(jìn)入患者口腔、呼吸道及皮膚黏膜,成為院內(nèi)感染的潛在威脅[7]。目前,關(guān)于DUWLs消毒殺菌的方案日益改進(jìn),實(shí)際應(yīng)用中,包括次氯酸、過氧化氫、臭氧機(jī)等消毒劑、消毒設(shè)備不斷普及,但尚無一種兼具安全有效的消毒方法[8]。為確保能夠提高DUWLs消毒效果,仍需在現(xiàn)有基礎(chǔ)上尋求其他更加有效的消毒方法,進(jìn)一步提高DUWLs水樣合格率。
次溴酸是一種安全高效的殺菌活性物質(zhì),溶于水中能夠顯著提高活性,且適用的pH值范圍更加廣泛,其活性基本不受水中其他物質(zhì)影響[9]。次溴酸作為殺菌劑的發(fā)展趨勢(shì)受到眾多行業(yè)重視,Li等[10]研究中發(fā)現(xiàn),次溴酸具有廣譜殺菌作用,對(duì)革蘭陽(yáng)性性菌、革蘭陰性菌及真菌等均發(fā)揮良好的殺菌活性。Kalchayanand"等[11]研究中,使用次溴酸可減少大腸桿菌和沙門氏菌的暴露時(shí)間。上述研究結(jié)果均證實(shí)次溴酸具有良好的殺菌作用,而目前尚無研究將其用于口腔科殺菌消毒中。本研究考慮到目前DUWLs污染問題的嚴(yán)重性,使用次溴酸進(jìn)行DUWLs消毒,根據(jù)研究數(shù)據(jù)發(fā)現(xiàn),實(shí)驗(yàn)組在第3天開始,診療前和沖洗3min后的菌落數(shù)穩(wěn)定,雖有菌落檢出,但總體菌落數(shù)少于對(duì)照組(Plt;0.001),研究數(shù)據(jù)表明,次溴酸能夠提高DUWLs合格率。相關(guān)研究認(rèn)為,次溴酸的殺菌機(jī)理與其氧化活性有關(guān),作用于微生物細(xì)胞壁,其氧化作用能夠增加細(xì)胞壁通透性,導(dǎo)致細(xì)胞中蛋白質(zhì)與核心物質(zhì)滲出,DNA雙鏈斷裂,從而發(fā)揮殺菌作用[12]。另有研究指出,與次氯酸的生成物相比,次溴酸更易產(chǎn)生分子反應(yīng),因此殺菌速度快,在應(yīng)用條件下具有一定優(yōu)勢(shì),認(rèn)為次溴酸可作為次氯酸的替代品[13]。但受條件限制,本研究尚未使用次氯酸進(jìn)行對(duì)比,關(guān)于次溴酸與次氯酸的優(yōu)勢(shì)比較,仍需進(jìn)一步展開研究。
DUWLs水樣合格率是目前需解決的一大難題,相關(guān)研究認(rèn)為,DUWLs水樣合格率與生物膜形成有關(guān),生物膜是一類基質(zhì)包裹、相互黏附與環(huán)境相接觸的微生物群體,微生物之間具有較強(qiáng)黏附性,難以從DUWLs管道中脫落,影響DUWLs水樣合格率[14]。本研究中實(shí)驗(yàn)組器械水樣合格率均高于對(duì)照組,結(jié)合上一研究結(jié)果認(rèn)為,次溴酸用于DUWLs消毒能夠提高生物膜清除率,減少DUWLs管道中菌落數(shù),提高水樣合格率。研究表明,次溴酸與微生物體內(nèi)原生質(zhì)相結(jié)合,與微生物體內(nèi)蛋白阮形成穩(wěn)定氫鹵鍵,對(duì)微生物生長(zhǎng)及代謝過程造成干擾,導(dǎo)致微生物死亡[15]。這也是次溴酸長(zhǎng)期作用下能夠清除生物膜的關(guān)鍵機(jī)制。但綜合本研究數(shù)據(jù),考慮到每日診療前仍有菌落檢出,建議實(shí)際應(yīng)用中每日仍進(jìn)行3min沖洗后再進(jìn)行診療,以便于預(yù)防菌落增生,進(jìn)一步提高安全性。
目前國(guó)內(nèi)外雖證實(shí)次溴酸的殺毒殺菌作用,但尚無研究將其用于DUWLs消毒中。本研究以提高DUWLs水樣合格率為出發(fā)點(diǎn),使用次溴酸進(jìn)行DUWLs消毒,證實(shí)其具有實(shí)際應(yīng)用價(jià)值。本研究在國(guó)內(nèi)具有一定創(chuàng)新性,可為后期研究提供參考依據(jù)。本研究的局限性在于,受醫(yī)療資源限制,研究尚無使用其他消毒殺菌設(shè)備進(jìn)行對(duì)照,盡管國(guó)外研究提出次溴酸可作為次氯酸的替代品,但本研究尚未證實(shí)此觀點(diǎn),今后研究將使用多種消毒方式進(jìn)行對(duì)比,以證實(shí)次溴酸在其中的應(yīng)用優(yōu)勢(shì)和劣勢(shì)。另外,本研究尚未評(píng)估次溴酸是否對(duì)儀器造成損壞,對(duì)儀器使用壽命的影響尚未分析,這也是本研究的局限性之一,今后也將重點(diǎn)觀察此類內(nèi)容,進(jìn)一步分析次溴酸在DUWLs消毒中的應(yīng)用價(jià)值。
綜上所述,次溴酸用于DUWLs消毒中能夠減少DUWLs管道中菌落數(shù),提高DUWLs水樣合格率,值得各級(jí)醫(yī)療機(jī)構(gòu)嘗試使用。
利益沖突:所有作者均聲明不存在利益沖突。
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