本文依據Walker和Avant（1995）所提出的步驟來對「無力感」作概念分析，擬出此概念適當的定義、屬性並舉出案例以便和相關概念作區別。在臨床許多急性、慢性及末期疾病病人，經常有「無力感」的情形產生，無力感除了會影響生活品質外，亦會導致病人病情惡化，甚而導致病人死亡。俗話有云：「哀莫大於心死」可見此問題對病人之傷害比疾病本身更嚴重，希望藉由概念分析的方法澄清此概念，使護理人員對此概念有正確的認知，並能廣泛應用於臨床。

　　　　　This article analyzed the concept of powerlessness according to the procedures presented by Walker and Avant (1995). A definition of powerlessness, attributes and examples of powerlessness, and differentiation from other relative concepts are presented. Findings reveal that patients in clinical settings who have acute and chronic diseases or terminal illnesses often experience powerlessness. Not only does powerlessness effect their quality of life, it can also cause deterioration of their condition and even death. The damage to the patient who experiences powerlessness is more severe than the disease itself. Feeling powerless can be equated with the saying: “It is a sad heart that never rejoices.” The aim of this analysis is to provide nurses with an accurate conception of powerlessness and with a broader view of implications for clinical application.