Evidence-Based Practice and the Curiosity of Nurses

By Betsy Todd, MPH, RN, CIC, AJN clinical editor

karen eliot/flickr by karen eliot/via flickr

In a series of articles in AJN, evidence-based practice (EBP) is defined as problem solving that “integrates the best evidence from well-designed studies and patient care data, and combines it with patient preferences and values and nurse expertise.”

We recently asked AJN’s Facebook fans to weigh in on the meaning of EBP for them. Some skeptics regarded it as simply the latest buzzword in health care, discussed “only when Joint Commission is in the building.” One comment noted that “evidence” can be misused to justify overtreatment and generate more profits. Another lamented that EBP serves to highlight the disconnect between education and practice—that is, between what we’re taught (usually, based on evidence) and what we do (often the result of limited resources).

There’s probably some truth in these observations. But at baseline, isn’t EBP simply about doing our best for patients by basing our clinical practice on the best evidence we can find? AJN has published some great examples of staff nurses who asked questions, set out to answer them, and ended up changing practice.

If You Think ‘Evidence-Based Practice’ Is Just Another Buzzword, Think Again

Do you ever wonder why nurses engage in practices that aren’t supported by evidence, while not implementing practices substantiated by a lot of evidence? In the past, nurses changed hospitalized patients’ IV dressings daily, even though no solid evidence supported this practice. When clinical trials finally explored how often to change IV dressings, results indicated that daily changes led to higher rates of phlebitis than did less frequent changes. In many hospital EDs across the country, children with asthma are treated with albuterol delivered with a nebulizer, even though substantial evidence shows that when albuterol is delivered with a metered-dose inhaler plus a spacer, children spend less time in the ED and have fewer adverse effects. Nurses even disrupt patients’ sleep, which is important for restorative healing, to document blood pressure and pulse rate because it’s hospital policy to take vital signs every two or four hours, even though no evidence supports that doing so improves the identification of potential complications.

That’s from the start of an article in the November issue of AJN, the first in a new series we are running to highlight the way’s evidence-based practice (EBP) changes what nurses do at the bedside—and saves lives. The authors point out that every day nurses perform dozens of actions and procedures without ever really asking whether the way they are doing them is the best way, or whether or not they are even helping patients by performing these actions.

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