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href="http://twitter.com/share?count=horizontal&original_referer=https%3A%2F%2Fwww.e-healthnet.mhlw.go.jp%2Finformation%2Fdictionary%2Falcohol%2Fya-009.html&text=血中アルコール濃度 » 飲酒して消化管から吸収されたアルコールが血中に移行した状態の濃度で、酔いの程度を決める。&url=https://www.e-healthnet.mhlw.go.jp/information/dictionary/alcohol/ya-009.html" onclick="window.open(this.href, 'tweetwindow', 'width=550, height=450,personalbar=0,toolbar=0,scrollbars=1,resizable=1'); return false;"><img src="https://www.e-healthnet.mhlw.go.jp/information/wp-content/themes/mhlw/img/social_twitter.png" alt="twitterでシェアする" title="twitterでこのページをシェアする" /></a></p> <p id="share_fb"><a href="http://www.facebook.com/share.php?u=https%3A%2F%2Fwww.e-healthnet.mhlw.go.jp%2Finformation%2Fdictionary%2Falcohol%2Fya-009.html" onclick="window.open(this.href, 'FBwindow', 'width=650, height=450, menubar=no, toolbar=no, scrollbars=yes'); return false;"><img src="https://www.e-healthnet.mhlw.go.jp/information/wp-content/themes/mhlw/img/social_facebook.png" alt="facebookでシェアする" title="facebookでこのページをシェアする" /></a></p> </div> </div> </div> <div class="articlepost"> <p>アルコールを摂取するとわずかに口腔や食道の粘膜から吸収されるものの、胃で25％、残りの大部分が小腸で吸収されます。吸収されるとほぼ全量血中に入るため、摂取したアルコール量や濃度が血中アルコール濃度に影響することになります。<br />しかしそれだけでなく、身体的な条件も関係してきます。胃ではアルコール吸収速度は遅く、小腸では早いため、胃切除後ではアルコールが早期に小腸に達して吸収されることによって、血中濃度の上昇が速くなります。また胃内に食物があるような状況では吸収が遅くなります。</p> <p>アルコールの中枢神経への作用は血中濃度によって決まるため、酔いの程度も血中濃度と相関します。血中濃度(%)が「0.02～0.04：爽快期」「0.05～0.10：ほろ酔い期」「0.11～0.15：酩酊初期」「0.16～0.30：酩酊極期」「0.31～0.40：泥酔期」「0.41～：昏睡期」というのが血中濃度と酔いの程度の目安です。<br />標準的には日本酒3合程度飲酒すると酩酊初期になり、まともに歩けなくなって嘔気や嘔吐も出現するとされます。またこの血中濃度(%)を5倍した数字がほぼ呼気中濃度(mg/L)となります。</p> </div>  <style> .info_author { display: inline-block; vertical-align: middle; margin: 10px; margin-left: 20px; margin-right: 20px; } .info_author_right { display: inline-block; vertical-align: middle; margin : 10px; margin-left: 10px; margin-bottom: 0px; } .furigana { font-size: 150%; } .description { font-weight: bold; margin-bottom: 5px; font-size: 100%; } 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<li><a href="https://www.e-healthnet.mhlw.go.jp/information/alcohol/a-03-004.html">飲酒 / 賢く飲むためのコツ / 酔い方の異常</a></li> <li><a href="https://www.e-healthnet.mhlw.go.jp/information/alcohol/a-01-001.html">飲酒 / アルコールによる健康障害 / 急性アルコール中毒</a></li> </ol> </div> </div>  <div class="aside23"> <nav class="sub_memu row"> <p id="related_title" class="sub_title">関連用語</p> <ul id="related"> <li><a href="https://www.e-healthnet.mhlw.go.jp/information/dictionary/alcohol/ya-020.html">アルコール酩酊</a></li> </ul> </nav> <nav class="sub_memu row"> <div id="sub_search" class="cf"> <form method="get" action="https://www.e-healthnet.mhlw.go.jp/information/"> <input type="search" name="s" id="s" placeholder="用語辞典を検索" /> <input type="hidden" name="post_type[]" value="dictionary" /> <button type="submit" value="Search" id="submit" class="btn">Search</button> </form> </div> </nav> <nav class="sub_memu row"> <p id="category_title" class="sub_title">関連用語カテゴリ</p> <ul class="sub_lists"> <li><a 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