{"id":3257,"date":"2018-01-02T23:38:33","date_gmt":"2018-01-02T22:38:33","guid":{"rendered":"http:\/\/chapshard.com\/site\/?p=3257"},"modified":"2019-09-17T13:44:00","modified_gmt":"2019-09-17T11:44:00","slug":"3257","status":"publish","type":"post","link":"http:\/\/chapshard.com\/site\/index.php\/2018\/01\/02\/3257\/","title":{"rendered":"CHLORAETHYL et PROTOXYDE D&rsquo;AZOTE &#8211; Manuel \u00e0 l&rsquo;usage des urgentistes &#8211; Gestion de PEC avec risque l\u00e9tal"},"content":{"rendered":"<div class=\"entry-content\">\n<h1><span style=\"color: #ff0000;\"><strong>Manuel \u00e0 l\u2019usage des Urgentistes<br \/>\nDocumentation toxicologique, pharmacocin\u00e9tique, et de PEC premi\u00e8re urgence avec risque l\u00e9tal dans le cadre d\u2019un usage \u00ab\u00a0r\u00e9cr\u00e9atif\u00a0\u00bb<\/strong><\/span><\/h1>\n<p><strong>Un lexique est disponible au bas de cette page.<\/strong><br \/>\nEt tu pourras toujours tenter de \u00ab\u00a0tester\u00a0\u00bb les connaissances de ceux qui veulent t\u2019initier \u00e0 l\u2019usage du chloraethyl et du protoxyde d\u2019azote avant de savoir si tu peux passer \u00e0 l\u2019acte avec eux sans risque\u2026 et l\u00e0 : navr\u00e9, mais c\u2019est pas gagn\u00e9 d\u2019avance !\u00a0 Plus de 99,9% des mecs qui veulent te \u00ab\u00a0gazer\u00a0\u00bb sont simplement des meurtriers en puissance\u2026 car en cas de \u00ab\u00a0p\u00e9pin\u00a0\u00bb, il ne faut pas r\u00eaver : les m\u00e9decins urgentistes n&rsquo;auront plus grand chose \u00e0 faire. <span style=\"color: #ff0000;\"><em><strong><br \/>\n<\/strong><\/em><\/span><\/p>\n<hr \/>\n<h1 style=\"text-align: right;\"><strong>Chlora\u00e9thyl <\/strong><\/h1>\n<p><span style=\"text-decoration: underline;\"><strong>Caract\u00e9ristiques physico-chimiques<\/strong><\/span><br \/>\n<b>Chloro\u00e9thane<\/b> ou monochloro\u00e9thane,<br \/>\nanciennement chlorure \u00e9thylique (ou chlorure d\u2019\u00e9thyle, <strong>acide muriatique<\/strong>\u2026<br \/>\nFormule chimique brute: C2H5Cl<br \/>\nT\u00b0Fus: -138\u00b0C; T\u00b0Ebu: 12,5\u00b0C -&gt; Fluide frigorig\u00e8ne<br \/>\nGaz incolore, inflammable, odeur l\u00e9g\u00e8re et douce<br \/>\nSeuil odorat (Homme): bas 4,2 ppm<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>Usages et action pharmacologique<\/strong><\/span><br \/>\nAnalg\u00e9sie\/Anesth\u00e9siologie<u><b><br \/>\n<\/b><\/u>Anesth\u00e9sie locale<b><br \/>\n<\/b>Anesth\u00e9sie g\u00e9n\u00e9rale abandonn\u00e9e en raison de la <b>toxicit\u00e9<\/b> aigu\u00eb et chronique<br \/>\n<b>Usage r\u00e9cr\u00e9atif\u00a0 : <\/b>Narcotique non inscrit au tableau des stup\u00e9fiants, <strong><span style=\"color: #ff0000;\">tr\u00e8s fortement addictif !!!<\/span><\/strong><\/p>\n<p><span style=\"text-decoration: underline;\"><b>Pharmacologie<\/b><\/span><u><b><br \/>\n<\/b><\/u><b>En tant qu\u2019anesth\u00e9sique local<\/b><u><b><br \/>\n<\/b><\/u>Blocage de la conduction nerveuse des fibres motrices et sensitives par inhibition des canaux sodiques voltage d\u00e9pendants.<\/p>\n<p><span style=\"text-decoration: underline;\"><b>Usage r\u00e9cr\u00e9atif<\/b><\/span><u><b><br \/>\n<\/b><\/u>Proc\u00e8de des effets secondaires suite \u00e0 l\u2019inhalation <b>sous faible pO2<\/b>.<br \/>\nMod\u00e8le \u00abtype ivresse alcoolique aigu\u00eb\u00bb: incoordination motrice, d\u00e9tente, euphorie, perte des rep\u00e8res temporels, narcose.<br \/>\n<strong>Tr\u00e8s fortement addictif !!!<\/strong><\/p>\n<p><strong><span style=\"text-decoration: underline;\">Pharmacocin\u00e9tique<\/span><br \/>\n<\/strong><b>Absorption<\/b>: rapide et massive au niveau alv\u00e9olaire<br \/>\n<b>Distribution<\/b>: ensemble des compartiments (rapide passage vasculaire, cibles (SNC, coeur, foie)<br \/>\n<b>M\u00e9tabolisation <\/b>: pas de m\u00e9tabolites connus<br \/>\n<b>Excr\u00e9tion<\/b>: sous forme inchang\u00e9e dans l\u2019air expir\u00e9, pr\u00e9sence dans les urines, les selles et la sueur<\/p>\n<p><strong><span style=\"text-decoration: underline;\">Toxicit\u00e9 aigu\u00eb et chronique<\/span><br \/>\n<\/strong><b>Organes cibles<\/b>: SNC, syst\u00e8me cardiovasculaire, poumons, foie et reins<br \/>\n<u><b>Toxicit\u00e9 aigu\u00eb<\/b><\/u>: DA imm\u00e9diat\/r\u00e9manence courte (&lt;4min)<br \/>\n\u00c9tat d\u2019\u00e9bri\u00e9t\u00e9, vertiges, l\u00e9thargie, perte de contr\u00f4le moteur jusqu\u2019\u00e0 mouvements \u00e9pilepto\u00efdes, perte des rep\u00e8res temporels, maux de t\u00eate, douleurs abdominales, narcose.<br \/>\nIrritation pharyngienne et trach\u00e9o-bronchique<br \/>\nTrouble du rythme cardiaque jusqu\u2019\u00e0 la <b>fibrillation ventriculaire et ACR<\/b> (attention chez le patient connu pour arythmie cardiaque<\/p>\n<p><u><b>Toxicit\u00e9 chronique<br \/>\n<\/b><\/u>Peu document\u00e9e<br \/>\nPr\u00e9dominance de la clinique <b>niveau neurologique<\/b>: Ataxie, tr\u00e9mors, dysphasie, ralentissement des r\u00e9flexes, mouvements oculaires involontaires, hallucinations.<br \/>\nD\u00e9faillances visc\u00e9rales notamment h\u00e9patique et r\u00e9nale en cas d\u2019inhalation importante sur plusieurs mois<br \/>\nNon certaine pour la mutagen\u00e8se\/canc\u00e9rogen\u00e8se: cas de dysplasies h\u00e9patiques et ut\u00e9rines sur mod\u00e8le animal<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>Clinique PEC<\/strong><\/span><br \/>\nExtraire le patient de l\u2019atmosph\u00e8re contamin\u00e9e, <b>LVA+PLS si inconscient<\/b>.<br \/>\nContacter les urgences commencer et en m\u00eame temps commencer la RCP (MCE et si possible DEA)<br \/>\nMonitoring TA, Pouls, FR, T\u00b0, SaO2, cyanose, TRC (inter\u00eat d\u2019avoir le mat\u00e9riel sur place en cas d\u2019usage r\u00e9cr\u00e9atif: tensiom\u00e8tre, saturom\u00e8tre voire DEA \u00e0 proximit\u00e9\u2026)<br \/>\nPour info: Intoxication massive -&gt; RCP classique avec VA O2 15L au BAVU ou IT, DZP, Xylo, monitoring, bilan neuro, bio..<\/p>\n<hr \/>\n<h1 style=\"text-align: right;\"><strong>Protoxyde d\u2019azote \u2013 N2O<\/strong><\/h1>\n<p><span style=\"text-decoration: underline;\"><strong>Propri\u00e9t\u00e9s physico-chimiques<\/strong><\/span><br \/>\nEn pratique MEOPA= M\u00e9lange \u00e9quimol\u00e9culaire d\u2019O2 et de N2O en bouteilles de 15 ou 20L sous une pression de 170 bars<u>.<\/u> <strong>Le m\u00e9lange pour l\u2019anesth\u00e9sie g\u00e9n\u00e9rale contiennent minimum 21% d\u2019O2.<\/strong><br \/>\nCommun\u00e9ment appel\u00e9 \u00abgaz hilarant\u00bb<br \/>\nKalinox* d\u00e9livre par exemple sous 1 bar \u00e0 15\u00b0C: 1,5m3 pour 5L, 4,5m3 pour 15L\u2026<br \/>\nGaz incolore, discr\u00e8te odeur douce\u00e2tre, gaz \u00e0 effet de serre<br \/>\nT\u00b0Eb: -89\u00b0C<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>Usages<\/strong><\/span><br \/>\nAnalg\u00e9sie non opiac\u00e9e au cours de l\u2019aide m\u00e9dicale d\u2019urgence, analg\u00e9sie avant actes douloureux (EVA mod\u00e9r\u00e9e de 4-6)<br \/>\nPas d\u2019effet anesth\u00e9siant pour la MEOPA<br \/>\nUsage r\u00e9cr\u00e9atif<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>Pharmacologie<\/strong><\/span><br \/>\nAnalg\u00e9sie non opiac\u00e9e. Ne se lie pas aux r\u00e9cepteurs opio\u00efdes.<br \/>\nEffet analg\u00e9sique majeur \u00e9quivalent \u00e0 15mg de morphine en IM<br \/>\nDA: 3min<br \/>\nM\u00e9canisme d\u2019action: induction de production de peptide opio\u00efde<br \/>\n-&gt;activation de neurones noradr\u00e9nergiques<br \/>\n-&gt;modulation des voies nociceptives au niveau m\u00e9dullaire=analg\u00e9sie<br \/>\nAutres hypoth\u00e8ses: implications des r\u00e9cepteurs \u00e0 dopamine, \u03b22 adr\u00e9nergiques, r\u00e9cepteurs GABA, r\u00e9cepteurs NDMA mais m\u00e9canisme d\u2019action encore inconnu.<\/p>\n<p><span style=\"text-decoration: underline;\"><strong>Pharmacocin\u00e9tique<\/strong><\/span><br \/>\n<b>Absorption<\/b>: transalveolaire, rapide mais incompl\u00e8te (gradient de concentration alv\u00e9ole\/sang faible)<br \/>\n<b>Distribution<\/b>: large en raison de la liposolubilit\u00e9<br \/>\n<b>M\u00e9tabolisation<\/b>: marginale au niveau h\u00e9pato-r\u00e9nal, r\u00e9duction en N2 par les bact\u00e9ries de l\u2019intestin.<br \/>\n<b>Excr\u00e9tion<\/b>: grande partie directement dans l\u2019air expir\u00e9. Petite excr\u00e9tion urinaire et cutan\u00e9e.<\/p>\n<p><strong><span style=\"text-decoration: underline;\">Toxicit\u00e9 aig\u00fce<\/span><br \/>\n<\/strong>En aigu, en grande partie l\u2019usage r\u00e9cr\u00e9atif: le N2O est un psychodysleptique entra\u00eenant euphorie, d\u00e9sinhibition, somnolence, s\u2019accompagnant de c\u00e9phal\u00e9es puis alt\u00e9ration de l\u2019\u00e9tat de conscience avec amn\u00e9sie<br \/>\nDyspn\u00e9e et asphyxie (prend la place de l\u2019O2-&gt;hypoxie donc surveiller la SaO2, FiO2). En pratique rare car MEOPA contient 50% O2 (21% pour les m\u00e9langes pour anesth\u00e9sie).<br \/>\nAugmentation de la PIC<br \/>\nRaucit\u00e9 de la voix (inverse de l\u2019h\u00e9lium )<br \/>\nSpasmes<br \/>\nHypersialorrh\u00e9e<br \/>\n\u00c0 forte dose, le N2O se comporte comme un narcotique avec un effet anesth\u00e9sique central (il faut 80% de gaz pur dans la fraction inspir\u00e9e). Prodromes: naus\u00e9es et vomissements, vertiges, hypoxie (SaO2!), hallucinations<\/p>\n<p><strong><span style=\"text-decoration: underline;\">Toxicit\u00e9 chronique = My\u00e9lotoxicit\u00e9 et neurotoxicit\u00e9<\/span><br \/>\n<\/strong>Carence en vitamine B12 par inhibition enzymatique au niveau h\u00e9patique (m\u00e9thionine synthase)-&gt; an\u00e9mie macrocytaire et atteintes neurologiques classiques des carences profondes en B12 (troubles l\u2019\u00e9quilibre, paresth\u00e9sie puis polyn\u00e9vrite spastisque). <b>Donc dosage la vitamine B12 et \u00e9ventuellement suppl\u00e9mentation orale lors des usages chroniques \u00e0 forte dose<\/b>.<\/p>\n<p><strong><span style=\"text-decoration: underline;\">Les contre indications absolues<\/span><br \/>\n<\/strong>Patients n\u00e9cessitant une VA \u00e0 100% en O2<br \/>\nHTIC<br \/>\nAlt\u00e9ration de la conscience emp\u00eachant la coop\u00e9ration su sujet<br \/>\nPneumothorax, emphys\u00e8me, embolie gazeuse, accident de plong\u00e9e<br \/>\nDistension abdominale gazeuse<br \/>\nAttention aux patients dr\u00e9panocytaires: O2 avant toute administration de N2O quelque soit la concentration<\/p>\n<hr \/>\n<h3><span style=\"text-decoration: underline;\"><strong>Et peu importe le gaz utilis\u00e9<\/strong><\/span><\/h3>\n<ul>\n<li>On respecte les consignes de s\u00e9curit\u00e9 sur le contenant<\/li>\n<li>On ventile les locaux<\/li>\n<li>On porte un masque filtrant l\u2019air <b>inspir\u00e9<\/b><\/li>\n<li>En cas d\u2019alt\u00e9ration de l\u2019\u00e9tat du sujet, on l\u2019extrait du lieu avant toute intervention.<\/li>\n<\/ul>\n<hr \/>\n<h1><strong>Abr\u00e9viations<\/strong><\/h1>\n<p><strong>ppm<\/strong> : partie par million<\/p>\n<p><strong>pO2<\/strong> : pression partielle en O2 d\u2019un milieu<\/p>\n<p><strong>SNC<\/strong> : syst\u00e8me nerveux central<\/p>\n<p><strong>DA<\/strong> : d\u00e9lai d\u2019action<\/p>\n<p><strong>ACR <\/strong>: arr\u00eat cardiorespiratoire<\/p>\n<p><strong>LVA<\/strong> : lib\u00e9ration des voies a\u00e9riennes<\/p>\n<p><strong>PLS<\/strong> : position lat\u00e9rale de s\u00e9curit\u00e9<\/p>\n<p><strong>RCP<\/strong> : r\u00e9animation cardio-pulmonaire<\/p>\n<p><strong>MCE<\/strong> : massage cardiaque externe<\/p>\n<p><strong>DAE<\/strong> : d\u00e9fibrillateur cardiaque externe<\/p>\n<p><strong>TA<\/strong> : Tension art\u00e9rielle<\/p>\n<p><strong>FR<\/strong> : fr\u00e9quence respiratoire<\/p>\n<p><strong>SaO2<\/strong> : saturation en O2<\/p>\n<p><strong>TRC<\/strong> : temps de recoloration cutan\u00e9e<\/p>\n<p><strong>EVA<\/strong> : \u00c9chelle visuelle analogique de la douleur<\/p>\n<p><strong>IM<\/strong> : intramusculaire<\/p>\n<p><strong>PIC<\/strong> : pression intracr\u00e2nienne<\/p>\n<p><strong>HTIC<\/strong> : hypertension intracr\u00e2nienne<\/p>\n<p><strong>VA<\/strong> : ventilation assist\u00e9e<\/p>\n<p>&nbsp;<\/p>\n<hr \/>\n<h3><strong><em>Un immense merci \u00e0 mon pote Jean-Philippe, docteur en m\u00e9decine, pharmacocin\u00e9ticicien et toxicologue, pour cette synth\u00e8se UNIQUE SUR LE WEB d\u2019information sur ces substances excessivement dangereuses que sont le CHLORAETHYL et le PROTOXYDE D\u2019AZOTE \u2013 N2O !!!<\/em><\/strong><\/h3>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Manuel \u00e0 l\u2019usage des Urgentistes Documentation toxicologique, pharmacocin\u00e9tique, et de PEC premi\u00e8re urgence avec risque l\u00e9tal dans le cadre d\u2019un usage \u00ab\u00a0r\u00e9cr\u00e9atif\u00a0\u00bb Un lexique est disponible au bas de cette page. Et tu pourras toujours tenter de \u00ab\u00a0tester\u00a0\u00bb les connaissances de ceux qui veulent t\u2019initier \u00e0 l\u2019usage du chloraethyl et du protoxyde d\u2019azote avant de &hellip; <\/p>\n<p class=\"link-more\"><a href=\"http:\/\/chapshard.com\/site\/index.php\/2018\/01\/02\/3257\/\" class=\"more-link\">Continuer la lecture<span class=\"screen-reader-text\"> de &laquo;&nbsp;CHLORAETHYL et PROTOXYDE D&rsquo;AZOTE &#8211; Manuel \u00e0 l&rsquo;usage des urgentistes &#8211; Gestion de PEC avec risque l\u00e9tal&nbsp;&raquo;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[135],"tags":[139,157,153,155,156,314,158,152],"class_list":["post-3257","post","type-post","status-publish","format-standard","hentry","category-le-blog","tag-alerte-de-securite","tag-chlora","tag-chloraethyl","tag-chloraethyle","tag-chloraethylene","tag-n2o","tag-proto","tag-protoxyde-dazote"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>CHLORAETHYL et PROTOXYDE D&#039;AZOTE - Manuel \u00e0 l&#039;usage des urgentistes - Gestion de PEC avec risque l\u00e9tal - CHAPSHARD<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/chapshard.com\/site\/index.php\/2018\/01\/02\/3257\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"CHLORAETHYL et PROTOXYDE D&#039;AZOTE - Manuel \u00e0 l&#039;usage des urgentistes - Gestion de PEC avec risque l\u00e9tal - CHAPSHARD\" \/>\n<meta property=\"og:description\" content=\"Manuel \u00e0 l\u2019usage des Urgentistes Documentation toxicologique, pharmacocin\u00e9tique, et de PEC premi\u00e8re urgence avec risque l\u00e9tal dans le cadre d\u2019un usage \u00ab\u00a0r\u00e9cr\u00e9atif\u00a0\u00bb Un lexique est disponible au bas de cette page. 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