本篇文章從作者於加護病房的實際觀察出發，對照後續參與基礎急重症護理訓練(ICU Training)課程所獲得的知識，逐步認識譫妄的本質與其臨床影響。透過描述兩位大夜班學姊在夜間光線、聲音調節上的照護差異，作者反思這些微小行為背後對病人可能產生的深層影響，包括創傷後壓力症候群(posttraumatic stressdisorder, PTSD)的高發比例。課程中學習到的疼痛、躁動、譫妄、制動、睡眠紊亂(pain, agitation, delirium, immobility, sleep disruption;PADIS)指南，進一步揭示國際間對譫妄預防的非藥物性策略重視，例如早期下床活動、日夜節律建立與感官再導向。文章強調，譫妄預防並非額外負擔，而是回歸照護本質的實踐，並呼籲更多臨床照護者意識到自身日常行動對病人精神狀態與預後的重要性。這不只是對生命的守護，也是對人的完整性的捍衛。

This article presents the author’s clinical observations in the intensive care unit (ICU), with these later enriched by formal ICU training, which led to a deeper understanding of delirium and its clinical implications. It contrasts the approaches of two night-shift nurses in managing light and noise, reflecting on how subtle differences in care may influence patient outcomes, including the high incidence of posttraumatic stress disorder among ICU survivors. The PADIS (pain, agitation, delirium, immobility, sleep disruption) Guideline introduced in training emphasizes the importance of nonpharmacologic interventions for delirium prevention, such as early mobilization, circadian rhythm reestablishment, and sensory reorientation. The author further highlights that preventing delirium is not an additional burden but a return to the essence of humancentered care. This insight inspires a call for caregivers to recognize the profound effects of their daily practices on a patient’s mental state and long-term recovery. Simple but intentional actions can not only sustain life but also preserve the patient’s sense of self.