费伊·阿卜杜拉(Faye Abdellah)是最早的护理理论家之一。她有许多著作和出版物，引导护理更以病人为中心的护理，而不是疾病为中心。1960年，Abdellah和她的同事们通过大量的研究和实践，提出了“21个护理问题理论”，也被称为“以病人为中心的护理理论”。这一理论被细分为患者的社会学、生理和情感需求。Abdellah的理论利用了Virginia Henderson的14个基本的人类需求来创建她的21个护理问题理论列表。Abdellah和她的同事还列出了如何识别护理问题的10个步骤和护理需要能够识别这些问题的11个护理技能(Petiprin, 2016)。这个理论之所以被选为这个项目是因为它比其他理论与我的临床实践更相关。在选择前对理论进行回顾后，我意识到在心脏医院的护理实践中，我每天在评估患者时都会用到这一理论。在不知情的情况下，这一理论被用来为我的病人提供最好的治疗，使病人达到最佳健康状态。评估21个护理问题理论的框架是Fawcett和DeSanto-Madeya对护理理论的分析和评估(Meleis, 2012)。该方法的框架要求通过其范围、上下文、内容、意义、内部一致性、简约性、可测性、经验充分性和语用充分性来审查该理论，作为该理论的评价标准。
One of the first theorists in nursing is Faye Abdellah. She had many writings and publications that lead nursing to more patient-centered care rather than disease-centered (Zerwekh & Garneau, 2012). In 1960 Abdellah and her colleagues developed the 21 Nursing Problems theory, which was also called the patient-centered approach to nursing theory, after many research studies and from her practice (McEwen & Wills, 2014). This theory is subgrouped into sociological, physical and emotional needs of the patients. Abdellah’s theory utilized Virginia Henderson’s 14 basic human needs to create her 21 nursing problems theory list (Alligood, 2014). Abdellah and her colleagues also composed a list of 10 steps of how to identify nursing problems and 11 nursing skills nursing needs to be able to identify those problems (Petiprin, 2016). This theory was selected for this project because it has the most relevance to my clinical practice than the other theories noted. After reviewing the theory before selection, it was realized that this theory is used in my practice daily when assessing patients in the nursing practice of the heart hospital. Without knowing it, this theory is being utilized to give my patients the best care possible to get the patient to their optimum health.The framework used to evaluate the theory of 21 nursing problems is Fawcett and DeSanto-Madeya’s analysis and evaluation of nursing theories (Meleis, 2012). The framework of this method requires the examination of the theory through its scope, context, content, significance, internal consistency, parsimony, testability, empirical adequacy and pragmatic adequacy as the criteria for evaluation of this theory .