シャドーイング練習: How To: Ultrasound for Pneumothorax Case Study Video - 動画で英語スピーキングを学ぶ

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Hello, my name is Phil Pereira, and I'm the Emergency Ultrasound Coordinator at the New York Presbyterian Hospital in New York City, and welcome to SoundBytes Cases.

In this module, we're going to look specifically at ultrasound of the lung to evaluate for pneumothorax.

Interestingly enough, a classical belief was that the lung was not optimal for ultrasound imaging.

However, newer findings have shown that actually ultrasound is an excellent modality for viewing the pleura and for detecting pneumothoraces.

There's been a lot of research looking at this, and what's interesting is

that ultrasound has been found now to be more sensitive than chest X -ray in the diagnosis of pneumothorax, especially in the supine trauma patient. And now,

we're going to add on views of the lungs looking for pneumothorax as part of our extended FAST exam

or the E -FAST exam that we'll be performing in trauma patients.

We can also detect pneumothoraces as well in our medical patients.

Now let's learn how to perform the ultrasound examination for the pneumothorax detection.

Here we have the high -frequency linear type array probe positioned

on the anterior chest wall at about the mid -clavicular line looking into about intercostal space three.

Now in most cases of pneumothorax with the patient's supine, the air would be predominantly seen in this area.

Note we're looking in a long axis configuration between the ribs with a marker dot oriented superiorly towards the patient's head.

Once we've identified both the ribs and the pleura, we can swivel the probe into the short axis configuration to further look at the pleura and to detect pneumothorax.

Here we have the probe oriented in a transverse or short axis orientation between the ribs, looking directly down at the pleura.

Notice in this case, the marker dot is located towards the lateral aspect of the patient.

Using both long and short axis configurations will allow you to detect a pneumothorax with a high degree of accuracy.

If no lung is seen on the anterior chest wall, one can size out a pneumothorax by looking in the lateral positions as shown here.

Notice the probe on the lateral chest wall in the short axis configuration between the ribs.

If lung is seen here laterally, but not anteriorly, this would tell you it was an incomplete pneumothorax.

We can complement the short axis view by locating the probe

into the long axis configuration with the marker dot towards the

patient's axilla to further examine into these lateral areas of the chest wall.

Here's a nice pictorial showing the normal findings of a lung in a long axis type configuration.

Superior rib to the left, inferior rib to the right.

Notice

that the ribs cast shadows posteriorly due to the inability of the sound waves to permeate the hard calcifications of the rib.

We see the chest wall anteriorly, and note here the two layers of the pleura.

And we see here the outer parietal pleura and the inner visceral pleura.

Now, while I've depicted these as two separate layers, in reality, on ultrasound examination,

they're seen as a single shimmering white line that moves back and forth as the patient breathes.

And as the patient breathes, we can see white comet tails or linear lines, vertical lines, coming off the pleura down deep into the lung.

So that will be the normal finding of a lung on long axis configuration.

Here's a nice ultrasound image showing a normal lung, and what we see here, we're in the long axis configuration, so the superior rib is to the left, inferior rib to the right,

chest wall anteriorly, and we see here the lung sliding, which is the opposition of the outer parietal and the inner visceral pleura,

and we see the vertical comet tails coming off the back of the pleura.

Thus, this is a completely normal exam, no pneumothorax.

But note the location of the pleura, deep to the ribs, and that classic shimmering line back and forth as the patient takes a breath.

Here we see more dramatic comet tails coming off the shimmering parietal and visceral pleura.

In this patient, we see the comet tail shooting off the back, telling us that this lung is up and there's no pneumothorax.

So vertical lines coming off the back of the pleura always mean

that the lung is up and are always a good sign on lung ultrasonography.

As we mentioned, we should also swivel the probe into the short axis configuration to further examine the lung, and what we see here is a normal lung in short axis configuration.

Note here we're looking in between the ribs, so all we see is the dome of the lung, and notice that it slides back and forth as the patient breathes, and we see the vertical comet tails coming off the back.

So a completely normal examination in the short axis plane.

Here's another ultrasound image taken from the short axis configuration.

Note here we see very prominent comet tails coming off the back of the lung as it slides back and forth.

Again, it's that opposition of the parietal and visceral layers of the pleura that allow the lungs shimmering, but notice here all the comet tails coming off the back.

In this case, this patient had some pulmonary edema associated with the lung, and these comet tails are more pronounced due to the presence of water within the pleura.

But notice all these vertical lines coming off the back telling us this lung is up.

A way to document that the lung is up to print out for the chart is to put M mode, and generally what we do is locate it so the M -mode cursor is down right at the pleura.

And what we see is the classic seashore sign or waves on the beach.

If we look anteriorly, we'll see the classic waves or no motion of the chest wall.

And below that, deep to the pleura, we'll see the positive motion of the lung making up the beach.

So waves on the beach or the seashore sign

and M -mode documentation that the lung is up and that there's no pneumothorax.

Now that we understand what a normal lung looks like on bedside examination, let's take a look at a pictorial showing a pneumothorax in a long axis view.

We see here that the parietal pleura is now split from the visceral pleura, which is attached to the lung, by a layer of air shown by the yellow color.

It's the splitting of the parietal and visceral pleura that now causes a lack of lung sliding,

and instead of the opposed visceral and parietal pleura sliding back and forth as the patient breathes, all we see is a single line,

the parietal pleura, with a lack of vertical comet tails coming off the back.

Here's an ultrasound image taken from a patient who was stabbed to the left chest and who had shortness of breath.

What we see here is a long axis view of a pneumothorax.

Let's take a look at the chest wall anteriorly, and right below that we see the parietal pleura, the single white line located directly inferior to the ribs,

but notice the classic lack of the lung sliding.

All we see here is a single white line that fails to slide back and forth as the patient breathes.

Notice also the absence of the vertical comet tails.

Here's another image of a pneumothorax in a long axis configuration, and we see here the chest wall anteriorly and the single white line which is the parietal pleura.

Now this patient was acutely dyspneic, so notice that there is some motion of the chest wall and that the parietal pleura moves up and down, but notice the failure of horizontal sliding.

Notice also the absence of any vertical comet tails coming off the back of the pleura.

Now let's inspect a pneumothorax from the short axis view.

We see the chest wall anteriorly, the parietal pleura as shown as a single non -mobile white line in the middle of the image.

Note the failure of movement back and forth, the lack of vertical comet tails, and what we see here is repeating horizontal air lines from the pneumothorax.

To document the absence of lung sliding and the presence of a pneumothorax, we'll again turn to M -mode.

If we put the M -mode cursor down on the pleura, what we'll see is a set of linear repeating lines.

This documents no motion of both the chest wall and of the lung, making up a finding known as the barcode sign.

Here's a pictorial showing an interesting finding, the signature of an incomplete pneumothorax known as lead point.

And what we see is an incomplete pneumothorax with error collecting to the superior aspect of the image to the left,

thus splitting the parietal from the visceral layers and causing an absence of lung sliding superiorly.

However, as the lung is coming up against the chest wall to the right or inferiorly,

that's where we'll see the presence of horizontal lung sliding and the presence of the vertical comet tails.

Here's an ultrasound image showing the lead point and what we see here is the lung sliding to the right, the area where the lung touches up against the chest wall and to the left,

the area of absence of lung sliding telling you there that air has collected between the visceral and parietal layers.

So the ultrasound equivalent of the image that we just looked at telling you that this is an incomplete pneumothorax.

But here we see that lead point or transition point very well on bedside sonography.

In conclusion, I'm glad I could share with you this ultrasound module going over ultrasound of the lung to evaluate for pneumothorax.

This is an excellent tool for viewing the pleura and making the diagnosis of pneumothorax.

And there's been some research showing that it may be more sensitive than chest X -ray in the diagnosis of pneumothorax, allowing rapid diagnosis of pneumo in both your trauma and medical patient,

thus facilitating more timely management of these most critical patients.

So I hope to see you back as SoundBytes continues.

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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「How To: Ultrasound for Pneumothorax Case Study Video」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：lung, pleura, pneumothorax, axis, chest。この動画には、シャドーイング用の文が91文、単語が1719語あります。音声の長さは9:11です。話す速さは速く、1分あたり約187語です。音のつながりや弱く発音される音が多くなります。英語の頻出3,000語に含まれる単語は73%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
lung 名詞	/ˈlʌŋ/	肺臓, 肺
axis 名詞	/ˈæksɪs/	軸
ultrasound 名詞	/ʌl.tɹə.saʊnd/	超音波
tail 名詞	/ˈteɪ̯l/	尻尾, しっぽ
slide 名詞	/ˈslaɪ̯d/	滑り台
comet 名詞	/ˈkɒmɪt/	彗星, 箒星
configuration 名詞	/kənˌfɪɡ.əˈɹeɪ̯.ʃən/	構成, 配置
vertical 形容詞	/ˈvɝ.tɪ.kəl/	垂直の, 縦の
rib 名詞	/ɹɪb/	肋骨
breathe 動詞	/bɹiːð/	呼吸する, 息をする
examination 名詞	/ɪɡˌzæm.ɪˈneɪ.ʃən/	診察, 検査
layer 名詞	/ˈleɪ̯ɚ/	層, 膜
absence 名詞	/ˈæb.s(ə)n̩s/	欠席, 不在
diagnosis 名詞	/daɪəɡˈnəʊsɪs/	診断
detect 動詞	/dɪˈtɛkt/	検出する, 見付ける

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
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 shown · There's been · has been found
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	has been found · is located · is seen
関係詞節 who / which + 節 — 人や物について情報を加える	sliding, which is · pleura, which is · line which is

注意したい発音

話し手はwe'll, we're, I'mなど、短縮形や弱形を16回使っています。聞こえたとおりの短い形で発音しましょう。

「th」の音: breathe /bɹiːð/, pneumothorax /ˈnju.moʊˌθɔ.ɹæks/
「sh」と「zh」の音: configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, examination /ɪɡˌzæm.ɪˈneɪ.ʃən/, transition /tɹænˈzɪʃ.ən/, shadow /ˈʃædəʊ̯/, conclusion /kənˈkluːʒən/
長い単語（アクセントの位置に注意）: configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, examination /ɪɡˌzæm.ɪˈneɪ.ʃən/, superior /sʊˈpɪɹ.i.ɚ/, horizontal /ˌhoɹəˈzɑn.təl/, inferior /ɪnˈfɪɹ.i.ɚ/

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: ultrasound /ʌl.tɹə.saʊnd/, lateral /ˈlætəɹəl/, linear /ˈlɪn.i.əɹ/, horizontal /ˌhoɹəˈzɑn.təl/, predominantly /pɹɪˈdɒmɪnəntli/
/v/ — /b/ にならないように、上の歯を下唇に当てる: vertical /ˈvɝ.tɪ.kəl/, sensitive /ˈsɛn.sɪt.ɪv/, evaluate /ɪˈvaljʊeɪt/, visceral /ˈvɪsəɹəl/, swivel /ˈswɪvəl/
/f/ — 「フ」ではなく、上の歯と下唇で出す: configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, inferior /ɪnˈfɪɹ.i.ɚ/, belief /bɪˈliːf/, frequency /ˈfɹiːkwənsi/, facilitate /fəˈsɪlɪteɪt/

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。
まず0.75倍速で一文ずつシャドーイングし、慣れてきたら通常の速度に戻します。
自分の声を録音して元の音声と比べます。lung, axis, ultrasound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。

シャドーイングのやり方: ステップ別の完全ガイドを読む →

シャドーイング練習: How To: Ultrasound for Pneumothorax Case Study Video - 動画で英語スピーキングを学ぶ

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