This article, also useful for perioperative team management exam preparation, explains the key concepts of radiation protection: deterministic effects, stochastic effects, equivalent dose, and effective dose. Using simple analogies (a boxer’s punch vs. a probability game) along with charts and diagrams, it helps clarify how thresholds, Gy, and Sv are applied in clinical and occupational exposure.

放射線被曝の確率的影響と確定的影響，さらに等価線量と実効線量の違いをわかりやすく解説．例えや図解で理解が深まります．

Radiation is invisible energy that can affect the human body in different ways. This article explains external vs. internal exposure, and the differences between public, medical, and occupational exposure. With everyday examples and practical notes for healthcare professionals, it provides essential knowledge to balance safety and benefits in clinical practice.

放射線と被曝の基本を，外部・内部被曝，公衆・医療・職業被曝に分けて整理しました．臨床現場や試験対策にも役立つ内容です．周術期管理チーム試験対策・麻酔科専門医試験対策

Essential tips for OR & cath lab staff: Radiation protection principles (Distance, Shielding, Time) and proper PPE use to reduce exposure risks.

放射線防護の基本は「距離・遮蔽・時間」．さらに防護衣・甲状腺ガード・ゴーグルなど個人防護具の使い方を整理しました．周術期管理チーム試験対策・麻酔科専門医試験対策にも役立ちます．

Hypoxemia is not a disease but a state: low oxygen in the blood (PaO₂ < 60 mmHg). In this article, we use a fruit shop and apples analogy to make complex physiology simple. We explore the differences between hypoxemia and hypoxia, and explain four main mechanisms—hypoventilation, impaired oxygenation, impaired transport, and impaired utilization—with clinical examples from perioperative care.

低酸素血症を「果物屋とリンゴ」の例えでわかりやすく解説．低換気・酸素化障害・運搬障害・利用障害の4つの原因を整理しました．周術期管理チーム試験対策・麻酔科専門医試験対策に役立ちます．

♦️ Introduction Healthcare providers, especially in large hospitals, see blood products every day. Each unit comes with a label full of codes and abbreviations—but do you really know what they all mean? Let’s break down two important ones: 🔷 Ir (Irradiated: Gamma-irradiated) “Ir” indicates...