跟讀練習: Understanding Hyperkalaemia (High Potassium) - 通過影片學習英語口語
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Hi, this is Tom from ZeroToFinals.com.
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In this video, I'm going to be going through hyperkalemia.
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And you can find written notes on this topic at ZeroToFinals.com slash hyperkalemia or in the renal medicine section of the second edition of the Zero to Finals medicine book.
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And you can find flashcards and questions to train your knowledge and help you remember the information for longer at members.zerotofinals.com So let's jump straight in
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Hyperkalemia refers to a raised serum potassium,
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a raised potassium level in the blood The main complication of hyperkalemia is cardiac arrhythmias such as ventricular fibrillation which can lead to cardiac arrest
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Let's go through the ranges for the serum potassium levels and what they mean and the units for these levels are millimoles per litre.
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A normal range for potassium is 3.5 to 5.3.
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Mild hyperkalemia is 5.4 to 5.9.
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hyperkalemia is 6.0 to 6.4 and severe hyperkalemia is 6.5 and above.
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Let's go through the causes of hyperkalemia.
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Conditions that can cause a raised serum potassium include acute kidney injury, chronic kidney disease, typically stage four or five,
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rhabdomyolysis, adrenal insufficiency, and tumor lysis syndrome.
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There are four classes of medications that can cause a raised serum potassium, and these are worth remembering.
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Aldosterone antagonists, for example, spironolactone and apleronone.
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ACE inhibitors, for example, Ramipril.
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Angiotensin-2 receptor blockers, for example, Candisartan.
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And non-steroidal anti-inflammatory drugs or NSAIDs, for example, ibuprofen or naproxen.
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Hemolysis, which is the rupture of blood cells, which occurs during blood sampling can give a falsely elevated potassium, which is known as pseudohypocalemia.
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The lab might indicate that they've noticed hemolysis in the sample and recommend a repeat sample to get an accurate potassium level.
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Let's go through the ECG changes that occur with hyperkalemia.
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The ECG changes with hyperkalemia are important to remember and they are tall peaked T waves, flattened or absent P waves, prolonged PR interval, and broad QRS complexes.
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Finally, let's talk about the management of hyperkalemia.
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Each hospital will have a policy and protocol to follow for patients with hyperkalemia.
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There should be input from experienced seniors including the intensive care team for severe hyperkalemia and renal physicians for renal impairment.
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of serum potassium levels below 6.5 millimoles per liter without ECG changes is aimed at
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treating the underlying cause for example treating acute kidney injury and stopping causative medications for example spironolactone or ACE inhibitors.
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Patients require urgent treatment for hyperkalemia to bring the potassium level down if
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they have either ECG changes or a serum potassium level above 6.5 millimoles per liter.
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The mainstay of treatment is with an insulin and dextrose infusion and IV calcium gluconate.
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These are the two treatments to remember for hyperkalemia.
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Insulin drives potassium from the extracellular space, which is the space in the body outside the cells, including the blood, to the intracellular space.
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So it takes potassium out of the blood and into the cells.
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Dextrose is required alongside the insulin to prevent hypoglycemia, which is a low glucose level caused by the insulin taking glucose out of the blood.
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Calcium gluconate stabilizes the cardiac muscle cells and reduces the risk of arrhythmias.
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Other options for lowering the serum potassium are nebulized salbutamol, which temporarily drives potassium into cells.
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Oral calcium rhizonium, which reduces potassium absorption in the gastrointestinal tract, but this is slow and it causes quite bad constipation.
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Sodium bicarbonate in acidotic patients on renal advice Drives potassium into cells as it corrects the acidosis And hemodialysis may be required in severe or persistent cases
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Research has consistently shown that testing yourself after learning a topic Has a powerful effect on how long you retain that information This is known as the testing effect
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Studying and then testing yourself results in longer lasting and stronger recall on that information when tested at a later date
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Even when compared with additional study sessions If you're preparing for a medical exam and you're not regularly testing your knowledge and practicing your recall You're failing to maximize your potential
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The Zero to Finals member site contains flashcards, short answer questions,
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multiple choice questions and extended matching questions that are purpose built to supplement the Zero to Finals content helping you build your internal database of knowledge and take advantage of the powerful testing effect.
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If you like the Zero to Finals notes, books, videos and podcasts then you'll love the member site.
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為什麼要與這個影片練習口語？
通過觀看並模仿此影片，您可以有效提高英語口語表達能力。影片中詳細解釋了高鉀血症的症狀、病因及管理方法，使用了一些專業的醫療英語詞彙和表達。特別是從醫學角度來看，掌握這些詞彙和句式，對那些想要在醫療領域或相關行業工作的英語學習者尤為重要。通過跟讀和模仿發音，不僅可以幫助您更好地理解內容，同時也能提高英語發音和口語流利度。利用shadowspeaks方法，您可以在實際應用中加強語言技能，提升英語說得更自信。
語法與表達的語境
在這個影片中，演講者使用了一些重要的語法結構和表達方式：
- 被動語態：例如提到“hemolysis is known as pseudohypocalemia” （溶血被稱為偽低鉀血症），被動用法幫助我們理解病理狀態的定義。
- 條件句：如“if they have either ECG changes or a serum potassium level above 6.5 millimoles per liter” （如果他們有心電圖變化或血清鉀水平高於6.5毫摩爾每升），條件句描述了情境和應對措施。
- 動詞不定式：如“to prevent hypoglycemia” （防止低血糖），用以說明目的。
這些語法結構不僅豐富了演講內容，也為學習者提供了實用的英語表達示例，幫助您在英語影子跟讀時能夠更自然地模仿演講者的說話方式。
常見的發音陷阱
在此影片中，一些詞彙和短語可能對非母語者構成發音挑戰：
- hyperkalemia（高鉀血症）：這個醫學術語的讀音較為複雜，需要注意重音和音節劃分。
- cardiac arrhythmias（心臟心律失常）：該短語中“arrhythmias”的發音尤其容易出錯，建議反覆練習。
- ECG changes（心電圖變化）：正確讀出“ECG”非常重要，可以幫助您在未來的醫學交流中更加自信。
通過努力提高您對這些詞彙的發音技巧，您不僅能提高自身的提高英語發音能力，還能在與他人交流時顯得更加專業和自信。
影片中的語法
說話人最常用的結構，並附上影片中的原話：
| 結構 | 影片中的用法 |
|---|---|
| 被動語態 be + 過去分詞 — 強調發生了什麼，而不是誰做的 | is known · is aimed · is required |
| 定語從句 who / which + 從句 — 補充說明人或事物 | fibrillation which can · Hemolysis, which is · space, which is |
什麼是跟讀法？
跟讀法 (Shadowing) 是一種有科學依據的語言學習技巧，最初開發用於專業口譯員的培訓，並由多語言者Alexander Arguelles博士普及。這個方法簡單而強大：您在聽英語母語原聲的同時立即大聲重複——就像是一個延遲1-2秒緊跟說話者的影子。與被動聽力或語法練習不同，跟讀法強迫您的大腦和口腔肌肉同時處理並模模擬實的講話模式。研究表明它能顯著提高發音準確性，語調，節奏，連讀，聽力理解和口語流利度——使其成為雅思口語備考和真實英語交流最有效的方法之一。