{"id":7927,"date":"2021-03-10T16:07:41","date_gmt":"2021-03-10T15:07:41","guid":{"rendered":"https:\/\/www.atollplongee.com\/glossary\/barotraumatisme\/"},"modified":"2021-03-10T16:07:41","modified_gmt":"2021-03-10T15:07:41","slug":"barotraumatisme","status":"publish","type":"glossary","link":"https:\/\/www.atollplongee.com\/en\/glossary\/barotraumatisme\/","title":{"rendered":"Barotraumatisme<span class=\"dashicons\" data-icon=\"\" style=\"display:inline;vertical-align:baseline;\"><\/span>"},"content":{"rendered":"<p>&ldquo;Un barotraumatisme est un accident de plong&eacute;e li&eacute; &agrave; la modification &agrave; la descente ou &agrave; la remont&eacute;e de la diff&eacute;rence entre la <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Pression Absolue&lt;span class=&amp;quot;dashicons &amp;quot; data-icon=&amp;quot;&amp;quot; style=&amp;quot;display:inline;vertical-align:baseline;&amp;quot;&gt;&lt;\/span&gt;&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;&amp;quot;En plong&eacute;e, la pression absolue (ou pression environnante, ou pression ambiante) est la pression totale s&amp;#039;exer&ccedil;ant sur une surface, &agrave; une altitude donn&eacute;e (en surface) ou une profondeur donn&eacute;e (en immersion). En altitude, la pression absolue est &eacute;gale &agrave; la pression atmosph&eacute;rique, due au poids de la colonne d&amp;#039;air au-dessus du point de mesure. Elle vaut en g&eacute;n&eacute;ral environ 1 atm (&amp;quot;une atmosph&egrave;re&rdquo;), unit&eacute; d&eacute;finie comme la pression au niveau moyen de la mer sur la latitude de Paris, &eacute;gale &agrave; 1 013 25 bars ou 1 013,25 hPa. En plong&eacute;e, on utilise souvent la valeur de 1 bar.En profondeur, elle est &eacute;gale &agrave; la somme de la pression atmosph&eacute;rique (due au poids de la colonne d&amp;#039;air au-dessus de l&amp;#039;eau, terme ci-dessus) et de la pression hydrostatique (due au poids propre de la colonne d&amp;#039;eau consid&eacute;r&eacute;e).Comme la premi&egrave;re des deux composantes est fixe (1 bar) et que la seconde augmente d&amp;#039;un bar tous les dix m&egrave;tres d&amp;#039;eau de profondeur, la pression absolue augmente elle aussi d&amp;#039;un bar tous les 10 m&egrave;tres. La pression absolue n&amp;#039;augmente pas proportionnellement avec la profondeur d&amp;#039;immersion : seule une de ses composantes (la pression hydrostatique) a cette propri&eacute;t&eacute;.&amp;quot;&lt;\/div&gt;\"  href=\"https:\/\/www.atollplongee.com\/en\/glossary\/pression-absolue\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>pression absolue<\/a> et la <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Pression&lt;span class=&amp;quot;dashicons &amp;quot; data-icon=&amp;quot;&amp;quot; style=&amp;quot;display:inline;vertical-align:baseline;&amp;quot;&gt;&lt;\/span&gt;&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;&amp;quot;La pression est une grandeur physique qui se d&eacute;finit comme &eacute;tant l&amp;#039;intensit&eacute; de la force qu&amp;#039;exerce un gaz par unit&eacute; de surface. En plong&eacute;e sous-marine, elle permet d&amp;#039;&eacute;valuer la quantit&eacute; de gaz contenu dans un volume donn&eacute;. Elle se mesure en pascals dans le syst&egrave;me international (symbole Pa), mais se mesure plut&ocirc;t en bars en plong&eacute;e :  1bar=100000Pa=1kg\/cm2  En plong&eacute;e, on distingue plusieurs types de pression : &bull;\tLa pression absolue (ou pression ambiante, ou pression environnante),&bull;\tLa pression hydrostatique,&bull;\tla haute pression, la pression interm&eacute;diaire et la basse pression,&bull;\tLa mi-pression,&bull;\tLa notion de pression partielle&amp;quot;&lt;\/div&gt;\"  href=\"https:\/\/www.atollplongee.com\/en\/glossary\/pression\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>pression<\/a> r&eacute;gnant au sein des cavit&eacute;s d&rsquo;air composant le plongeur. C&rsquo;est une cons&eacute;quence directe de la loi de Boyle-Mariotte.<br>\nIl s&rsquo;agit d&rsquo;un accident dont la gravit&eacute; est tr&egrave;s variable, de b&eacute;nigne &agrave; importante, souvent suivant la modification de <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;Pression&lt;span class=&amp;quot;dashicons &amp;quot; data-icon=&amp;quot;&amp;quot; style=&amp;quot;display:inline;vertical-align:baseline;&amp;quot;&gt;&lt;\/span&gt;&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;&amp;quot;La pression est une grandeur physique qui se d&eacute;finit comme &eacute;tant l&amp;#039;intensit&eacute; de la force qu&amp;#039;exerce un gaz par unit&eacute; de surface. En plong&eacute;e sous-marine, elle permet d&amp;#039;&eacute;valuer la quantit&eacute; de gaz contenu dans un volume donn&eacute;. Elle se mesure en pascals dans le syst&egrave;me international (symbole Pa), mais se mesure plut&ocirc;t en bars en plong&eacute;e :  1bar=100000Pa=1kg\/cm2  En plong&eacute;e, on distingue plusieurs types de pression : &bull;\tLa pression absolue (ou pression ambiante, ou pression environnante),&bull;\tLa pression hydrostatique,&bull;\tla haute pression, la pression interm&eacute;diaire et la basse pression,&bull;\tLa mi-pression,&bull;\tLa notion de pression partielle&amp;quot;&lt;\/div&gt;\"  href=\"https:\/\/www.atollplongee.com\/en\/glossary\/pression\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'>pression<\/a> subie pendant l&rsquo;&eacute;v&eacute;nement. &ldquo;<\/p>","protected":false},"excerpt":{"rendered":"<p>&#8220;Un barotraumatisme est un accident de plong\u00e9e li\u00e9 \u00e0 la modification \u00e0 la descente ou \u00e0 la remont\u00e9e de la diff\u00e9rence entre la pression absolue et la pression r\u00e9gnant au sein des cavit\u00e9s d&#8217;air composant le plongeur. C&#8217;est une cons\u00e9quence directe de la loi de Boyle-Mariotte. Il s&#8217;agit d&#8217;un accident dont la gravit\u00e9 est tr\u00e8s [&hellip;]<\/p>","protected":false},"author":13,"featured_media":0,"menu_order":0,"template":"","meta":[],"glossary-categories":[],"glossary-tags":[],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v17.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Barotraumatisme - Atoll Plong\u00e9e Marseille<\/title>\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.atollplongee.com\/en\/glossary\/barotraumatisme\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Barotraumatisme - Atoll Plong\u00e9e Marseille\" \/>\n<meta property=\"og:description\" content=\"&#8220;Un barotraumatisme est un accident de plong\u00e9e li\u00e9 \u00e0 la modification \u00e0 la descente ou \u00e0 la remont\u00e9e de la diff\u00e9rence entre la pression absolue et la pression r\u00e9gnant au sein des cavit\u00e9s d&#8217;air composant le plongeur. 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