護理師照護一位晚期癌症病人，病人正經歷顯著疼痛，並有 PCA（病人自控式鎮痛）幫浦醫囑。護理師哪項說明最能解釋 PCA 幫浦？
A nurse is caring for a client with advanced cancer who is experiencing significant pain. The client has a PCA (Patient-Controlled Analgesia) pump ordered. Which statement by the nurse best explains the PCA pump?
- A"The pump will give you pain medicine automatically every hour."「幫浦會每小時自動為您注射止痛藥物。」
- B"The nurse will press the button for you when you need more medicine."「當您需要更多藥物時，護理師會幫您按下按鈕。」
- C"You can press the button to get a dose of pain medicine when you feel pain."✓ 正解「當您感到疼痛時，您可以按下按鈕來獲取一劑止痛藥物。」
- D"This pump is used only for severe pain that cannot be controlled otherwise."「此幫浦僅用於無法以其他方式控制的嚴重疼痛。」
PCA 的設計核心在於「病人自控（Patient-Controlled）」。其原理是讓病人根據自身疼痛感知，透過按壓控制器，由幫浦給予預設的安全劑量，從而達到快速且持續的疼痛緩解。此機制能減少因等待護理師給藥而產生的疼痛空窗期，並透過機器設定的鎖定時間（lockout interval）預防藥物過量。
A patient-controlled analgesia (PCA) pump allows the client to self-administer prescribed doses of pain medication by pressing a button when needed. This mechanism provides rapid relief and maintains consistent pain control while built-in lockout intervals prevent overdose. It is distinct from scheduled automatic dosing or nurse-administered boluses, empowering the client to manage their pain based on their own perception.
美國醫院對 PCA 的監測要求極高，通常需配備連續脈搏血氧儀（Pulse Oximetry）監測呼吸抑制風險，且護理師需定時評估鎮靜評分（Sedation Scale），這在美國是標準化流程。