シャドーイング練習: Escharotomy - Burn Care Series - 動画で英語スピーキングを学ぶ
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Escarotomy The
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skin of a deep bone can become thickened, dry and tight.
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there is often swelling underneath the burn that worsens over time.
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If the burn encircles a limb or the torso or neck,
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it can act like a tourniquet and reduce circulation or restrict breathing.
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In these cases, an escharotomy needs to be done.
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This procedure cuts through the tight skin to release the constriction.
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This will restore circulation in the limbs or improve breathing in the chest.
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This video shows how to recognize the need for escarotomy and how to do it.
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There are two signs that indicate the need for escarotomy.
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First, the burn extends all the way around a limb, the torso, or the neck.
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In this patient, the white appearing skin is a full thickness burn encircling both arms.
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Second, circulation is reduced.
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This patient's hands are cold,
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his pulse is weak, Capillary refill is delayed,
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taking longer than three seconds for a fingernail to regain its pink colour, and he has pain in his arms.
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If the burn is on the torso, check for difficulty breathing.
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This man has burns encircling his arms and signs of reduced circulation.
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He needs an emergency escharotomy.
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Escharotomy is often done at the bedside with sedation, local anesthesia and simple instruments.
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Or if you have the facilities and the escharotomy will be extensive, it can be done under general anesthesia.
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Create a sterile field, clean the limbs with antiseptic, and spread sterile drapes beneath them.
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Next, mark where you will make the incisions.
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Refer to accurate escarotomy guidelines for where to cut to avoid underlying nerves and blood vessels.
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Mark a line on the inside of the arm and a notch to avoid the ulnar nerve.
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Mark a line on the outside of the arm.
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To avoid cutting into the median nerve, keep the arm straight.
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If the arm is flexed, it's easy to cut in the wrong place.
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If the medial or innermost line is drawn down the side of the bent arm, when the arm is straightened,
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the line is now in the middle of the arm, you will risk cutting the median nerve.
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The patient's limbs must be in the anatomical position with the arms straight and palms facing forward.
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Now the lines are drawn correctly down the lateral part of the arm, avoiding the median nerve.
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On the leg, mark an inside line and an outside line.
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To avoid the common perineal nerve of the lateral lower leg, mark in front of the knob of the fibula.
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The chest will need excisions to allow expansion in all directions.
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On the hand, mark lines for three incisions between the metacarpal bones from the knuckles to the wrist.
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If you are giving local anesthesia, inject along the marks you have drawn on the skin.
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Here's how to do an escarotomy.
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Use a scalpel or an electric coterie tool.
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Start and end your incision within an area of normal skin or superficial burn.
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Make your cuts right through the depth of the burned tissue into the fat layer below
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so that the constricting tissue springs apart.
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Once you have cut deep enough, the sides will spring apart.
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This can be a few centimeters wide.
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The limb should immediately feel softer and the pulse should become stronger.
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Expect some bleeding with the incisions.
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Use direct pressure and pack some gauze in the incision.
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Put sterile Vaseline gauze over the burn.
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Follow with an absorbent layer of cotton dressing and a stretchy wrap.
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Elevate the limbs above the level of the heart and continue to monitor for signs that further escarotomy may be needed.
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Remember, an escharotomy is needed if a burn encircles the limb, the torso, or the neck,
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and there is reduced circulation.
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Cut through to the fat layer along the lines that avoid major nerves and vessels.
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Thank you.
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このレッスンの語彙とスピーキングのポイント
このスピーキングレッスンは、動画「Escharotomy - Burn Care Series」を教材にしています。 繰り返し出てくる語は次のとおりです：arm, burn, limb, nerve, mark。 この動画には、シャドーイング用の文が54文、単語が644語あります。 音声の長さは7:19です。 話す速さはゆっくりで、1分あたり約88語です。一つ一つの音をまねる余裕があります。 英語の頻出3,000語に含まれる単語は76%だけなので、語彙は難しめです。
この動画の重要語彙
動画に出てくる覚えておきたい単語15語を、発音と意味つきで紹介します。
| 単語 | 発音 | 意味 |
|---|---|---|
| limb 名詞 | /lɪm/ | 肢, 手足 |
| nerve 名詞 | /nɝv/ | 神経 |
| layer 名詞 | /ˈleɪ̯ɚ/ | 層, 膜 |
| breathe 動詞 | /bɹiːð/ | 呼吸する, 息をする |
| median 名詞 | /ˈmiː.di.ən/ | 中間数, 中央値 |
| bone 名詞 | /boʊn/ | 骨 |
| tissue 名詞 | /ˈtɪʃ.(j)u/ | 織物 |
| vessel 名詞 | /ˈvɛsəl/ | 船舶 |
| pulse 名詞 | /pʌls/ | 脈, 脈搏 |
| lateral 形容詞 | /ˈlætəɹəl/ | 横 |
| refer 動詞 | /ɹɪˈfɜː/ | 問い合わせる |
| procedure 名詞 | /pɹəˈsiː.d͡ʒə/ | 手段, やり方 |
| delay 名詞 | /dɪˈleɪ̯/ | 遅れ, 遅延 |
| monitor 名詞 | /ˈmɑ.nɪ.tɚ/ | モニター |
| cotton 名詞 | /ˈkɑt.n̩/ | 綿, 綿糸 |
この動画の文法
話し手がよく使っている文型を、動画の実際の表現とともに紹介します。
| 文型 | 動画での表現 |
|---|---|
| 受動態 be + 過去分詞 — 誰がするかより、何が起きるかに焦点を当てる | be done · is reduced · is delayed |
| 現在完了形 have/has + 過去分詞 — 過去の出来事が今も関係している | have drawn · have cut |
注意したい発音
- 「th」の音: breathe /bɹiːð/, beneath /bɪˈniːθ/, underneath /ˌʌndɚˈniθ/, thickness /ˈθɪknəs/, anesthesia /ˌæn.əsˈθi.ʒə/
- 「sh」と「zh」の音: circulation /ˌsɝkjʊˈleɪʃən/, tissue /ˈtɪʃ.(j)u/, superficial /ˌsupɚˈfɪʃəl/, incision /ɪnˈsɪʒən/, anesthesia /ˌæn.əsˈθi.ʒə/
- 長い単語（アクセントの位置に注意）: circulation /ˌsɝkjʊˈleɪʃən/, difficulty /ˈdɪfɪkəlti/, superficial /ˌsupɚˈfɪʃəl/, anesthesia /ˌæn.əsˈθi.ʒə/, anatomical /æ.nəˈtɑ.mɪ.kəl/
日本語話者が苦手な音：
- /r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: lateral /ˈlætəɹəl/, correctly /kəˈɹɛk(t).li/, sterile /ˈstɛɹəl/, perineal /ˌpɛɹɪˈniəl/, refill /ˈɹiː.fɪl/
- /v/ — /b/ にならないように、上の歯を下唇に当てる: nerve /nɝv/, vessel /ˈvɛsəl/, elevate /ˈɛləveɪt/
- /f/ — 「フ」ではなく、上の歯と下唇で出す: refer /ɹɪˈfɜː/, difficulty /ˈdɪfɪkəlti/, flex /flɛks/, superficial /ˌsupɚˈfɪʃəl/, fibula /ˈfɪb.jəl.ə/
この動画での練習方法
- まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
- 通常の速度で一文ずつシャドーイングし、話し手のリズムに合うまで繰り返します。
- 自分の声を録音して元の音声と比べます。limb, nerve, layerなどの単語に特に注意しましょう。
シャドーイングとは？英語上達に効果的な理由
シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。