why do we use evidence based practice
What is Evidence-Based Practice? The classic definition of Evidence-Based Practice (EBP) is from Dr David Sackett. EBP is the conscientious, explicit and judicious use of current best evidence in making decisions about the care of the individual patient. It means integrating individual clinical expertise with the best available external clinical evidence from systematic research. EBP has developed over time to now integrate the best research evidence, clinical expertise, the patient s individual values and circumstances, and the characteristics of the practice in which the health professional works. So, EBP is not only about applying the best research evidence to your decision-making, but also using the experience, skills and training that you have as a health professional and taking into account the patient s situation and values (e. g. social support, financial situation), as well as the practice context (e. g. limited funding) in which you are working.
The process of integrating all of this information is known as clinical reasoning. When you consider all of these four elements in a way that allows you to make decisions about the care of a patient, you are engaging in EBP. Why is Evidence-Based Practice Important? EBP is important because it aims to provide the most effective care that is available, with the aim of improving patient outcomes. Patients expect to receive the most effective care based on the best available evidence. EBP promotes an attitude of inquiry in health professionals and starts us thinking about: Why am I doing this in this way? Is there evidence that can guide me to do this in a more effective way? As health professionals, part of providing a professional service is ensuring that our practice is informed by the best available evidence.
EBP also plays a role in ensuring that finite health resources are used wisely and that relevant evidence is considered when decisions are made about funding health services. What happened before Evidence-Based Practice? Before EBP health professionals relied on the advice of more experienced colleagues, often taken at face value, their intuition, and on what they were taught as students. Experience is subject to flaws of bias and what we learn as students can quickly become outdated. Relying on older, more knowledgeable colleagues as a sole information source can provide dated, biased and incorrect information. This is not to say that clinical experience is not important - it is in fact part of the definition of EBP. However, rather than relying on clinical experience alone for decision making, health professionals need to use clinical experience together with other types of evidence-based information.
Is not all Published Research of Good Quality? Not all research is of sufficient quality to inform clinical decision making. Therefore you need to critically appraise evidence before using it to inform your clinical decision making. The three major aspects of evidence that you need to critically appraise are:
Validity - can you trust it? Impact - are the results clinically important? Applicability - can you apply it to your patient? Evidence-based practice has gained momentum in nursing, and definitions vary widely. Research findings, knowledge from basic science, clinical knowledge, and expert opinion are all considered "evidence"; however, practices based on research findings are more likely to result in the desired patient outcomes across various settings and geographic locations.
The impetus for evidence-based practice comes from payor and healthcare facility pressures for cost containment, greater availability of information, and greater consumer savvy about treatment and care options. Evidence-based practice demands changes in education of students, more practice-relevant research, and closer working relationships between clinicians and researchers. Evidence-based practice also provides opportunities for nursing care to be more individualized, more effective, streamlined, and dynamic, and to maximize effects of clinical judgment. When evidence is used to define best practices rather than to support existing practices, nursing care keeps pace with the latest technological advances and takes advantage of new knowledge developments.
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