{"id":3619,"date":"2021-01-20T10:16:56","date_gmt":"2021-01-20T10:16:56","guid":{"rendered":"\/?p=3619"},"modified":"2021-01-20T10:16:56","modified_gmt":"2021-01-20T10:16:56","slug":"the-importance-of-air-changes","status":"publish","type":"post","link":"https:\/\/www.vanguardhealthcare.co.uk\/hr_hr\/the-importance-of-air-changes\/","title":{"rendered":"Va\u017enost promjena zraka"},"content":{"rendered":"<p>Dok se planirani kirur\u0161ki zahvati nastavljaju u bolnicama, uz skrb za pacijente s Covidom-19, mjere opreza temeljene na prijenosu i dalje su klju\u010dne za smanjenje rizika i osiguravanje nastavka postupaka. Ali brzina izmjene zraka mogu\u0107a u operacijskim dvoranama tako\u0111er je klju\u010dni faktor.<\/p>\n<p>Osim \u0161to smanjuje rizik od infekcije, vrijeme koje je potrebno da se aerosoli uklone iz klini\u010dkih prostora pomo\u0107u ventilacijskih sustava mo\u017ee imati zna\u010dajan utjecaj na vrijeme potrebno izme\u0111u kirur\u0161kih i dijagnosti\u010dkih postupaka, a time i na razine u\u010dinkovitosti u operacijskim dvoranama i proceduralnim sobama.<\/p>\n<p><strong>Minimiziranje rizika<\/strong><\/p>\n<p>\u010cimbenici rizika koji mogu utjecati na prijenos infekcije u kinima prvenstveno uklju\u010duju vjerojatnost da \u0107e pacijenti imati Covid-19, \u0161to zauzvrat ovisi o primjerenosti i u\u010dinkovitosti izolacije i prethodnog pregleda pacijenata, kao i op\u0107oj prevalenciji stope prijenosa virusa i zajednice.<\/p>\n<p>Razina rizika pri poduzimanju elektivnih kirur\u0161kih i dijagnosti\u010dkih postupaka tako\u0111er ovisi o lokalnom pridr\u017eavanju relevantnih mjera predostro\u017enosti kontrole infekcije, kao \u0161to su priprema pacijenta, pranje ruku i upotreba odgovaraju\u0107e za\u0161titne opreme.<\/p>\n<p>Ali \u010dak i tamo gdje se poduzima niz mjera za siguran ulazak u non-Covid put, kao \u0161to su samoizolacija, provjera odsutnosti simptoma, povi\u0161ena tjelesna temperatura i negativni antigenski testovi prije prijema, odre\u0111ena razina rizika i dalje ostaje. Kako bi se ovaj rizik dodatno smanjio, potrebne su dodatne mjere opreza kako bi se osiguralo da se infekcija ne prenosi zrakom.<\/p>\n<p>Sustavi za filtriranje zraka u operacijskim dvoranama smanjuju rizik od infekcije \u010desticama u zraku. HEPA filter osigurava da je zrak koji se dovodi u kino dvoranu \u010dist, izmjene zraka osiguravaju svje\u017ei zrak u koli\u010dini dovoljnoj da razrijedi \u010destice u prostoriji na odgovaraju\u0107u razinu, dok pozitivan tlak osigurava da zrak koji ulazi u kino dvoranu to \u010dini u kontrolirani na\u010din.<\/p>\n<h4><strong>Postupci stvaranja aerosola (AGP)<\/strong><\/h4>\n<p>Potrebne su poja\u010dane mjere opreza u zraku kada se postupak generiranja aerosola (AGP) izvodi na pacijentu za kojeg se zna da je zara\u017een Covid-19 ili za kojeg je status Covid-19 nepoznat, ili se postupak provodi na lokaciji &#039;vru\u0107e to\u010dke&#039;, kako je definirao <a href=\"https:\/\/www.gov.uk\/government\/publications\/wuhan-novel-coronavirus-infection-prevention-and-control\/covid-19-personal-protective-equipment-ppe#ppe-guidance-by-healthcare-context\">Smjernice za javno zdravstvo Engleske (PHE).<\/a>.<\/p>\n<p>PHE trenuta\u010dno definira svaku operacijsku dvoranu u kojoj se redovito provode postupci stvaranja aerosola kao mjesto &#039;vru\u0107e to\u010dke&#039; ili <a href=\"https:\/\/www.gov.uk\/government\/publications\/wuhan-novel-coronavirus-infection-prevention-and-control\/covid-19-personal-protective-equipment-ppe#ppe-guidance-by-healthcare-context\">akutno podru\u010dje ve\u0107eg rizika<\/a>. Kao minimum, osobna za\u0161titna oprema za osoblje u dvoranama gdje se izvode postupci stvaranja aerosola trebala bi uklju\u010divati kirur\u0161ku masku otpornu na teku\u0107inu kako bi se smanjio rizik od raspr\u0161ivanja kapljica.<\/p>\n<p><a href=\"https:\/\/www.gov.uk\/government\/publications\/wuhan-novel-coronavirus-infection-prevention-and-control\/covid-19-infection-prevention-and-control-guidance-aerosol-generating-procedures\">Postupci stvaranja aerosola<\/a> mogu se podijeliti na respiratorne i kirur\u0161ke AGP-ove, pri \u010demu je kirur\u0161ki AGP op\u0107enito vjerojatno manjeg intrinzi\u010dnog rizika, iako mogu stvarati aerosole tijekom duljeg razdoblja. Primjeri uobi\u010dajenih AGP-ova su intubacija, ekstubacija, postupci povezani s traheostomijom, neinvazivna ventilacija, bronhoskopija, gornja gastrointestinalna endoskopija i odre\u0111eni stomatolo\u0161ki zahvati.<\/p>\n<p>Koliko je izmjena zraka potrebno za operacijsku dvoranu ovisi o vrsti operacije koja se u njoj provodi i smjernicama kojih se mora pridr\u017eavati.<\/p>\n<h4><strong>Vrijeme uklanjanja aerosola (ACTs)<\/strong><\/h4>\n<p>Dok standardna operacijska dvorana treba imati 20 izmjena zraka po satu, ta se stopa redovito prekora\u010duje i dvorane s laminarnim protokom obi\u010dno imaju mnogo ve\u0107u stopu od te. Sustavi laminarnog protoka omogu\u0107uju \u010dvr\u0161\u0107u kontrolu protoka zraka u radnom podru\u010dju.<\/p>\n<p>\u0160iroko prihva\u0107en <a href=\"https:\/\/www.cdc.gov\/infectioncontrol\/guidelines\/environmental\/appendix\/air.html#tableb1\">me\u0111unarodne smjernice<\/a> pogledajte podatke koji pokazuju da svaka izmjena zraka uklanja pribli\u017eno 63% zaga\u0111iva\u010da u zraku, pri \u010demu se &gt;99% uklanja nakon pet izmjena zraka. Na temelju ove pretpostavke, samo 0,004% cirkuliraju\u0107ih aerosola ostaje nakon 10 izmjena. Iako postoje ograni\u010deni dokazi koji podupiru ovu metodu izra\u010duna, ona se na\u0161iroko koristi, a smjernice PHE upu\u0107uju na nju.<\/p>\n<p>Koliko dugo je potrebno odre\u0111enom broju izmjena zraka ovisi o sustavu ventilacije u kinu, prostoriji ili zgradi koja se koristi. <a href=\"https:\/\/associationofanaesthetists-publications.onlinelibrary.wiley.com\/doi\/full\/10.1111\/anae.15146#anae15146-bib-0001\">Izra\u010dun<\/a> za &#039;vrijeme uklanjanja aerosola&#039; (ACT) - vrijeme potrebno u minutama za izmjenu zraka u prostoriji - je 60 podijeljeno s brojem izmjena zraka po satu izmjerenim ili procijenjenim za tu prostoriju. Dobiveno vrijeme u minutama zatim se mno\u017ei s potrebnim brojem izmjena zraka.<\/p>\n<p>Me\u0111utim, generi\u010dke smjernice i preporuke treba koristiti s oprezom. U stvarnosti, vremena uklanjanja aerosola ovise o karakteristikama prostorije i specifi\u010dna su za lokaciju. Kako bi se utvrdilo vrijeme uklanjanja aerosola za pojedina\u010dnu prostoriju ili kino dvoranu, zdravstvena slu\u017eba mora znati stope izmjene zraka za svaku lokaciju kina. Iako ve\u0107ina operacijskih dvorana ima visoku stopu ventilacije, op\u0107enito pri 20 ili vi\u0161e izmjena zraka na sat, to mo\u017ee varirati i postoji <a href=\"https:\/\/assets.publishing.service.gov.uk\/government\/uploads\/system\/uploads\/attachment_data\/file\/144029\/HTM_03-01_Part_A.pdf\">zakonski zahtjev<\/a> za stope ventilacije koje treba mjeriti svakih 14 mjeseci.<strong>&#160;<\/strong><\/p>\n<h4><strong>Razmak izme\u0111u postupaka<\/strong><\/h4>\n<p>A <a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/full\/10.1111\/anae.15146\">pismo koje je objavila Udruga anesteziologa<\/a> u lipnju predlo\u017eio da se izme\u0111u postupaka ostavi vrijeme uklanjanja aerosola (ACT) jednako vremenu potrebnom za pet izmjena zraka - mjereno za odre\u0111eno kazali\u0161te - kako bi se omogu\u0107ilo dovoljno uklanjanje aerosola. Ova se preporuka obi\u010dno spominje, me\u0111utim, procjene iz drugih izvora kre\u0107u se od dva ACT-a do 10-15 ACT-a.<\/p>\n<p>Na temelju pretpostavke da je potrebno pet izmjena zraka izme\u0111u zahvata, standardna operacijska dvorana s 20 izmjena zraka na sat trebala bi 15 minuta slobodnog vremena. Ventilacijski sustavi s laminarnim protokom mogu imati mnogo ve\u0107i broj izmjena zraka po satu, \u0161to zna\u010di da je potrebno kra\u0107e vrijeme izme\u0111u postupaka.<\/p>\n<p>Svaki zdravstveni djelatnik odlu\u010duje o vlastitoj politici u smislu prihvatljive u\u010destalosti izmjene zraka za sigurno uklanjanje aerosola, na temelju poznatih stopa izmjene zraka u klini\u010dkim podru\u010djima. Iako su dostupni tipi\u010dni rasponi za razli\u010dite vrste objekata, kori\u0161tenje procjena umjesto \u010dvrstih podataka mo\u017ee biti povezano s rizikom.<\/p>\n<p>Osim toga, za Covid-pozitivne pacijente ili pacijente \u010diji Covid status nije poznat, mo\u017ee biti potreban negativan tlak kako bi se smanjio rizik od infekcije izvan kino dvorane.<\/p>\n<p><strong>Pobolj\u0161anje vremena obrta u kazali\u0161tu<\/strong><\/p>\n<p>Bez obzira na broj izmjena zraka koje bolnica ima izme\u0111u postupaka, nema sumnje da politika koju svaka bolnica odlu\u010di mo\u017ee imati zna\u010dajne implikacije na razine produktivnosti u kinu. Smanjenje vremena potrebnog za svaku promjenu zraka, a time i vremena \u010dekanja u kinu, mo\u017ee dovesti do pove\u0107anja u\u010dinkovitosti i izravno utjecati na to koliko se pacijenata mo\u017ee lije\u010diti u jednom danu.<\/p>\n<p>\u0160to su ve\u0107i protoki zraka i broj izmjena zraka na sat koji su mogu\u0107i u sobi ili kinu, to je br\u017ei <a href=\"https:\/\/bjanaesthesia.org\/article\/S0007-0912(20)30853-9\/fulltext\">aerosoli se mogu o\u010distiti<\/a>, a vrijeme obrade pacijenata mo\u017ee biti br\u017ee. Iako se razlika i u\u0161te\u0111eno vrijeme izme\u0111u svakog zahvata mogu \u010diniti malima, to mo\u017ee \u010diniti zna\u010dajnu razliku u broju zahvata koji se poduzimaju u danu ili tjednu, \u0161to u kona\u010dnici smanjuje vrijeme \u010dekanja pacijenata na planirane kirur\u0161ke i dijagnosti\u010dke postupke.<\/p>\n<p>Mobilne i modularne operacijske dvorane predstavljaju visoko kontrolirana okru\u017eenja, \u0161to olak\u0161ava izra\u010dun broja potrebnih izmjena zraka u svakom slu\u010daju. Osim dodavanja kapaciteta za smanjenje lista \u010dekanja, ove jedinice u nekim slu\u010dajevima mogu ponuditi ve\u0107i broj izmjena zraka po satu od internih bolni\u010dkih objekata, \u010dime se jo\u0161 vi\u0161e pove\u0107ava protok.<\/p>\n<p>Vanguard-a <a href=\"\/hr_hr\/facilities\/operating-theatres\/\">mobilne operacijske dvorane<\/a> i <a href=\"\/hr_hr\/facilities\/endoscopy\/\">endoskopski apartmani<\/a> ponuditi zrak iz okoli\u0161a filtriran HEPA-om s do 30 izmjena svje\u017eeg zraka na sat koji prolazi preko pacijenta, dok <a href=\"\/hr_hr\/facilities\/operating-theatres\/\">pokretno laminarno kazali\u0161te<\/a> mo\u017ee izvr\u0161iti do 60 izmjena zraka na sat u kazali\u0161noj prostoriji.<\/p>\n<p>Dodatne informacije dostupne su u &#039;<a href=\"https:\/\/icmanaesthesiacovid-19.org\/managing-theatre-processes-for-planned-surgery-between-covid-19-surges\">Upravljanje kazali\u0161nim procesima za planirane operacije izme\u0111u izbijanja bolesti COVID-19<\/a>&#039;, zajedni\u010dki dokument sa smjernicama Fakulteta za intenzivnu medicinu, Dru\u0161tva za intenzivnu njegu, Udruge anesteziologa i Kraljevskog koled\u017ea anesteziologa, tako\u0111er odobren od strane Kraljevskog koled\u017ea kirurga Engleske.<\/p>\n<p>The <a href=\"https:\/\/www.rcseng.ac.uk\/coronavirus\/recovery-of-surgical-services\/\">Royal College of Surgeons<\/a> Engleske, <a href=\"https:\/\/www.alsgbi.org\/2020\/04\/22\/laparoscopy-in-the-covid-19-environment-alsgbi-position-statement\/\">Udruga laparoskopskih kirurga Velike Britanije i Irske<\/a> i an <a href=\"https:\/\/www.rcseng.ac.uk\/coronavirus\/joint-guidance-for-surgeons-v2\/\">intercollegiate group<\/a> kirur\u0161kih organizacija tako\u0111er su objavili dokumente sa smjernicama o kirur\u0161kim aspektima planiranih putova i lije\u010denja pacijenata tijekom Covid-19.<\/p>","protected":false},"excerpt":{"rendered":"<p>Dok se planirani kirur\u0161ki zahvati nastavljaju u bolnicama, uz skrb za pacijente s Covidom-19, mjere opreza temeljene na prijenosu i dalje su klju\u010dne za smanjenje rizika i osiguravanje nastavka postupaka. Ali brzina izmjene zraka mogu\u0107a u operacijskim dvoranama tako\u0111er je klju\u010dni faktor.<\/p>","protected":false},"author":1,"featured_media":1366,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2,115],"tags":[137,5,122],"class_list":["post-3619","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-products-and-services","tag-endoscopy-suite","tag-mobile","tag-operating-theatre"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The importance of air changes - Vanguard Healthcare Solutions<\/title>\n<meta name=\"description\" content=\"Transmission-based precautions as well as the rate of air changes possible in operating theatres are crucial to continue care during Covid-19\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.vanguardhealthcare.co.uk\/hr_hr\/the-importance-of-air-changes\/\" \/>\n<meta property=\"og:locale\" content=\"hr_HR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The importance of air changes - 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