Providing safe and effective health care relies on the registered nurses (RN) ability to make appropriate clinical decisions in all aspects of health care (Noon, 2014). Fluid and electrolyte imbalance is a serious and life threatening side effect, which is common in elderly patients with comorbidities (LeMone et al., 2011). The use of the clinical decision making cycle prevents adverse patient outcomes (LeMone et al., 2011). Clinical decision-making is defined as the ability to filter and synthesize information, make decisions, and effectively implement those decisions within a clinical setting (Levett-Jones et al., 2009). It is imperative nurses use critical thinking through this process, in order to come to an appropriate outcome (Levett-Jones