{"id":2650,"date":"2021-01-13T11:46:18","date_gmt":"2021-01-13T11:46:18","guid":{"rendered":"https:\/\/www.q-bital.com\/?p=2650"},"modified":"2021-01-13T11:46:18","modified_gmt":"2021-01-13T11:46:18","slug":"why-the-rate-of-air-changes-in-theatres-matter","status":"publish","type":"post","link":"https:\/\/www.q-bital.com\/cy_gb-wls\/why-the-rate-of-air-changes-in-theatres-matter\/","title":{"rendered":"Pam mae cyfradd y newidiadau aer mewn theatrau yn bwysig"},"content":{"rendered":"<p>Gan fod llawdriniaethau arfaethedig wedi ailddechrau mewn gwledydd fel Awstralia a Seland Newydd, mae rhagofalon sy&#039;n seiliedig ar drosglwyddo yn parhau i fod yn hanfodol i leihau risg a sicrhau bod gweithdrefnau&#039;n mynd rhagddynt. Ond mae cyfradd y newidiadau aer posibl mewn theatrau llawdriniaethau hefyd yn ffactor allweddol.<\/p>\n<p>Ar wah\u00e2n i leihau\u2019r risg o haint, gall yr amser sydd ei angen i erosolau gael eu clirio o ardaloedd clinigol gan systemau awyru gael effaith sylweddol ar yr amser sydd ei angen rhwng gweithdrefnau llawfeddygol a diagnostig, ac felly lefelau effeithlonrwydd mewn theatrau llawdriniaethau ac ystafelloedd llawdriniaeth.<\/p>\n<p><strong>Lleihau Risg<\/strong><\/p>\n<p>Ymhlith y ffactorau risg sydd \u00e2\u2019r potensial i ddylanwadu ar drosglwyddo haint mewn theatrau mae\u2019r tebygolrwydd y bydd cleifion yn cael Covid-19 yn y lle cyntaf, sydd yn ei dro\u2019n dibynnu ar ba mor ddigonol ac effeithiol yw ynysu a rhag-sgrinio cleifion, yn ogystal \u00e2 chyffredinolrwydd cyffredinol o cyfraddau trosglwyddo firws a chymunedol.<\/p>\n<p>Mae lefel y risg wrth gyflawni llawdriniaeth ddewisol a gweithdrefnau diagnostig hefyd yn dibynnu ar ymlyniad lleol at ragofalon rheoli heintiau perthnasol, megis paratoi cleifion, golchi dwylo a defnyddio PPE priodol.<\/p>\n<p>Ond hyd yn oed pan gymerir ystod o fesurau ar gyfer mynediad diogel i&#039;r llwybr nad yw&#039;n gysylltiedig \u00e2 Covid, megis hunan-ynysu, sgrinio am absenoldeb symptomau, tymheredd corff uwch a phrofion antigen negyddol cyn derbyn, mae rhywfaint o risg yn parhau. Er mwyn lleihau&#039;r risg hon ymhellach, mae angen rhagofalon ychwanegol i sicrhau nad yw haint yn cael ei drosglwyddo drwy&#039;r aer.<\/p>\n<p>Mae systemau hidlo aer mewn theatrau llawdriniaeth yn lleihau&#039;r risg o haint gan ronynnau yn yr awyr. Mae safonau gofynnol yn debyg mewn llawer o wledydd gan eu bod yn seiliedig ar argymhellion rhyngwladol, ond nid o reidrwydd yr un peth.<\/p>\n<p>Amlinellir y safon isafswm gofyniad Awstralia ar gyfer theatr llawdriniaethau <a href=\"https:\/\/infostore.saiglobal.com\/en-au\/standards\/as-1668-2-2012-120207_saig_as_as_251941\/\">AS1668 Rhan 2<\/a>, fel yr amlinellir gan God Building of Australia. Y gofynion allweddol yw bod angen i&#039;r aer sy&#039;n dod i mewn i&#039;r theatr basio trwy hidlydd gradd HEPA, ac mae angen isafswm cyfradd newid aer (ACH) o 20 newid aer yr awr. Dylai&#039;r aer hefyd fod dan bwysau positif i&#039;r ardaloedd cyfagos.<\/p>\n<p>Mae&#039;r hidlydd HEPA yn sicrhau bod yr aer a gyflenwir i&#039;r theatr yn l\u00e2n, mae&#039;r newidiadau aer yn sicrhau bod aer ffres yn cael ei ddarparu mewn swm sy&#039;n ddigonol i wanhau gronynnau yn yr ystafell i lefel addas, tra bod y pwysau positif yn sicrhau bod yr aer sy&#039;n mynd i mewn i&#039;r theatr yn gwneud hynny mewn a ffordd dan reolaeth.<\/p>\n<h4><strong>Gweithdrefnau cynhyrchu aerosol (AGPs)<\/strong><\/h4>\n<p>Mae angen rhagofalon gwell yn yr awyr pan fo angen <a href=\"https:\/\/www.cec.health.nsw.gov.au\/__data\/assets\/pdf_file\/0006\/596301\/AGPs-in-relation-to-COVID-19.pdf\">gweithdrefn cynhyrchu aerosol<\/a> (AGP) yn cael ei pherfformio ar glaf y gwyddys ei fod wedi&#039;i heintio \u00e2 Covid-19 neu nad yw&#039;r statws Covid-19 yn hysbys ar ei gyfer, neu y cynhelir triniaeth mewn lleoliad &#039;man problemus&#039;. Fel isafswm, dylai PPE ar gyfer staff mewn theatrau lle cynhelir gweithdrefnau cynhyrchu aerosol gynnwys mwgwd llawfeddygol sy&#039;n gwrthsefyll hylif i leihau&#039;r risg o wasgaru defnynnau.<\/p>\n<p>Gellir rhannu gweithdrefnau cynhyrchu erosol yn AGP anadlol a llawfeddygol, ac mae AGPau llawfeddygol yn gyffredinol yn debygol o fod \u00e2 risg gynhenid is, er y gallant gynhyrchu aerosolau am gyfnodau hwy. Enghreifftiau o AGPs cyffredin yw mewndiwbio, extubating, gweithdrefnau sy&#039;n gysylltiedig \u00e2 thraceostomi, awyru anfewnwthiol, broncosgopi, endosgopi gastro-berfeddol uchaf a rhai triniaethau deintyddol.<\/p>\n<p>Mae faint o newidiadau aer sydd eu hangen ar gyfer theatr lawdriniaeth yn dibynnu ar y math o lawdriniaeth a wneir ynddi, a&#039;r canllawiau y mae angen iddi gydymffurfio \u00e2 nhw. Mae gan wahanol daleithiau yn Awstralia ychydig <a href=\"https:\/\/www.health.nsw.gov.au\/Infectious\/covid-19\/communities-of-practice\/Pages\/guide-resuming-elective-surgery.aspx\">canllawiau gwahanol<\/a>, er eu bod ar y cyfan yn cydymffurfio \u00e2 safonau cenedlaethol a rhyngwladol.<\/p>\n<h4><strong>Amseroedd Clirio Aerosol (ACTs)<\/strong><\/h4>\n<p>Er bod angen i theatr llawdriniaethau safonol gael 20 newid aer yr awr, eir y tu hwnt i&#039;r gyfradd hon yn rheolaidd ac mae theatrau llif laminaidd yn tueddu i fod \u00e2 chyfradd llawer uwch na hynny. Mae systemau llif laminaidd yn caniat\u00e1u i lif aer gael ei reoli&#039;n dynnach ar draws yr ardal weithredu.<\/p>\n<p>Derbyn yn eang <a href=\"https:\/\/www.cdc.gov\/infectioncontrol\/guidelines\/environmental\/appendix\/air.html#tableb1\">canllawiau rhyngwladol<\/a> cyfeiriwch at ddata sy&#039;n nodi bod pob newid aer yn tynnu tua 63% o halogion yn yr awyr, gyda &gt;99% yn cael ei dynnu ar \u00f4l pum newid aer. Er mai cyfyngedig yw&#039;r dystiolaeth i gefnogi&#039;r dull hwn o gyfrifo, caiff ei ddefnyddio&#039;n helaeth. Yn seiliedig ar y rhagdybiaeth hon, dim ond 0.004% o&#039;r aerosolau cylchredeg sy&#039;n weddill ar \u00f4l 10 cyfnewid.<\/p>\n<p>Mae faint o amser y mae&#039;n ei gymryd i gyflawni nifer penodol o newidiadau aer yn dibynnu ar y system awyru yn y theatr, yr ystafell neu&#039;r adeilad a ddefnyddir. <a href=\"https:\/\/associationofanaesthetists-publications.onlinelibrary.wiley.com\/doi\/full\/10.1111\/anae.15146#anae15146-bib-0001\">Y cyfrifiad<\/a> ar gyfer yr &#039;amser clirio aerosol&#039; (ACT) - yr amser a gymerir mewn munudau ar gyfer cyfnewidfa aer mewn ystafell - yw 60 wedi&#039;i rannu \u00e2 nifer y newidiadau aer yr awr a fesurwyd neu a amcangyfrifir ar gyfer yr ystafell honno. Yna caiff yr amser canlyniadol mewn munudau ei luosi \u00e2 nifer y newidiadau aer sydd eu hangen.<\/p>\n<p>Fodd bynnag, dylid bod yn ofalus wrth ddefnyddio canllawiau ac argymhellion cyffredinol. Mewn gwirionedd, mae amseroedd clirio aerosol yn dibynnu ar nodweddion yr ystafell, ac maent yn benodol i leoliad. Er mwyn gweithio allan yr amser clirio aerosol ar gyfer ystafell neu theatr unigol, rhaid i&#039;r gwasanaeth iechyd wybod y cyfraddau cyfnewid awyr ar gyfer pob lleoliad theatr. Er bod gan y rhan fwyaf o theatrau llawdriniaeth gyfradd awyru uchel yr awr, gall hyn amrywio a chaiff cyfraddau awyru eu mesur yn rheolaidd dros amser.<strong>&#160;<\/strong><\/p>\n<h4><strong>Amser clirio rhwng gweithdrefnau<\/strong><\/h4>\n<p>A <a href=\"https:\/\/onlinelibrary.wiley.com\/doi\/full\/10.1111\/anae.15146\">llythyr a gyhoeddwyd gan Gymdeithas yr Anesthetyddion<\/a> ym mis Mehefin awgrymodd y dylid gadael amser clirio aerosol (ACT) sy&#039;n hafal i&#039;r amser y mae&#039;n ei gymryd i bum newid aer i feicio drwyddo - fel y&#039;i mesurwyd ar gyfer theatr benodol - rhwng gweithdrefnau i ganiat\u00e1u ar gyfer clirio aerosol digonol. Cyfeirir yn gyffredin at yr argymhelliad hwn, fodd bynnag, mae amcangyfrifon o ffynonellau eraill yn amrywio o ddau ACT hyd at 10-15 ACT.<\/p>\n<p>Yn seiliedig ar y rhagdybiaeth bod angen pum newid aer rhwng gweithdrefnau, byddai angen amser clirio o 15 munud ar theatr lawdriniaeth safonol gyda 20 newid aer yr awr. Gall systemau awyru theatr llif laminaidd gael nifer llawer uwch o newidiadau aer yr awr, sy&#039;n golygu bod angen amser byrrach rhwng gweithdrefnau.<\/p>\n<p>Mater i bob darparwr iechyd yw penderfynu ar ei bolisi ei hun o ran pa amlder newid aer sy&#039;n dderbyniol ar gyfer clirio erosolau yn ddiogel, yn seiliedig ar eu cyfraddau cyfnewid aer hysbys mewn meysydd clinigol. Er bod ystodau nodweddiadol ar gael ar gyfer gwahanol fathau o gyfleusterau, gellir cysylltu defnyddio amcangyfrifon yn hytrach na data caled \u00e2 risg.<\/p>\n<p>Yn ogystal, ar gyfer cleifion Covid-positif neu gleifion nad yw eu statws Covid yn hysbys, efallai y bydd angen pwysau negyddol i leihau&#039;r risg o haint y tu allan i amgylchedd y theatr.<\/p>\n<p><strong>Gwella amseroedd gweithredu theatrau<\/strong><\/p>\n<p>Waeth faint o newidiadau aer sydd gan ysbyty rhwng triniaethau, nid oes amheuaeth y gall y polisi y mae pob ysbyty yn penderfynu arno gael goblygiadau sylweddol ar lefelau cynhyrchiant theatrau. Gall gostyngiad yn yr amser a gymerir ar gyfer pob newid aer, ac felly amseroedd aros theatrau, arwain at enillion effeithiolrwydd ac effeithio&#039;n uniongyrchol ar faint o gleifion y gellir eu trin mewn un diwrnod.<\/p>\n<p>Po uchaf y llif aer a nifer yr aer yn newid awr sy&#039;n bosibl mewn ystafell neu theatr, y cyflymaf <a href=\"https:\/\/bjanaesthesia.org\/article\/S0007-0912(20)30853-9\/fulltext\">gellir clirio erosolau<\/a>, a&#039;r cyflymaf y gall amseroedd gweithredu cleifion fod. Er y gall y gwahaniaeth a&#039;r amser a arbedir rhwng pob triniaeth ymddangos yn fach, gall wneud gwahaniaeth sylweddol dros nifer y triniaethau a gyflawnir mewn diwrnod neu wythnos, gan leihau amseroedd aros cleifion am weithdrefnau llawfeddygol a diagnostig wedi&#039;u cynllunio yn y pen draw.<\/p>\n<p>Mae theatrau llawdriniaeth symudol a modiwlaidd yn cynrychioli amgylcheddau a reolir yn uchel, sy&#039;n hwyluso cyfrifo nifer y newidiadau aer sydd eu hangen ym mhob achos. Yn ogystal ag ychwanegu capasiti i helpu i leihau rhestrau aros, gall yr unedau hyn mewn rhai achosion gynnig nifer uwch o newidiadau aer yr awr na chyfleusterau mewnol ysbyty, gan gynyddu trwybwn hyd yn oed ymhellach.<\/p>\n<p>Q-bital&#039;s <a href=\"\/cy_gb-wls\/facilities\/operating-rooms\/\">theatrau llawdriniaeth symudol<\/a> a <a href=\"\/cy_gb-wls\/facilities\/endoscopy\/\">ystafelloedd endosgopi<\/a> cynnig aer amgylcheddol wedi&#039;i hidlo HEPA gyda hyd at 30 o newidiadau awyr iach yr awr yn pasio dros y claf, tra a <a href=\"\/cy_gb-wls\/facilities\/operating-rooms\/\">theatr llif laminaidd symudol<\/a> yn gallu perfformio hyd at 60 o newidiadau aer yr awr yn ystafell y theatr.<\/p>","protected":false},"excerpt":{"rendered":"<p>Gan fod llawdriniaethau arfaethedig wedi ailddechrau mewn gwledydd fel Awstralia a Seland Newydd, mae rhagofalon sy&#039;n seiliedig ar drosglwyddo yn parhau i fod yn hanfodol i leihau risg a sicrhau bod gweithdrefnau&#039;n mynd rhagddynt. Ond mae cyfradd y newidiadau aer posibl mewn theatrau llawdriniaethau hefyd yn ffactor allweddol.<\/p>","protected":false},"author":1,"featured_media":1307,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[2,119],"tags":[136,5,4,135,125],"class_list":["post-2650","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-products-and-services","tag-australia","tag-mobile","tag-modular","tag-new-zealand","tag-operating-theatre"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Why the rate of air changes in theatres matter - Q-bital Healthcare Solutions<\/title>\n<meta name=\"description\" content=\"As well as transmission-based precautions, the rate of air changes possible in operating theatres is also a key factor in minimising risk\" \/>\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.q-bital.com\/cy_gb-wls\/why-the-rate-of-air-changes-in-theatres-matter\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Why the rate of air changes in theatres matter - 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