8.6 Clinical Inquiry & Evidence-Based Practice

The Synergy Model Competency: Clinical Inquiry

Clinical Inquiry (also called the evaluation/research competency) is the Synergy Model competency defined as the ongoing process of questioning and evaluating practice, and providing informed practice based on research and experiential learning, along with the ability to innovate and initiate change. It closes the loop on the entire Synergy Model: a nurse who is vigilant (Caring Practices), collaborates across disciplines (Collaboration), and navigates system resources (Systems Thinking) still needs Clinical Inquiry to ask whether the practices being followed are actually the best ones, and to help change them when evidence says otherwise.

On the competency continuum, basic-level clinical inquiry follows standards and guidelines and recognizes the need for change; expert-level clinical inquiry improves, deviates from, and individualizes standards and guidelines as needed for a specific patient/situation, questions and/or evaluates current practice based on patients' responses, and actively engages in research or quality-improvement activities.

The Three Pillars of Evidence-Based Practice

Evidence-based practice (EBP) is not simply "doing what a research study says." It is the integration of three equally weighted components:

1. Best available research evidence — the most current, rigorous evidence relevant to the clinical question.
2. Clinical expertise — the nurse's/team's accumulated skill, judgment, and experience in applying evidence to a real patient.
3. Patient values and preferences — what matters to this specific patient and family (directly connecting back to Autonomy in Section 8.2 and Response to Diversity in Section 8.3).

A practice change or bedside decision that ignores any one of these three pillars — for example, applying a guideline rigidly without considering a patient's stated preferences — is not genuine evidence-based practice, even if the underlying research is sound. This three-pillar definition is one of the most frequently tested EBP concepts on critical-care certification exams.

The Evidence Hierarchy

When evaluating the strength of evidence supporting a practice change, the traditional hierarchy (strongest to weakest) is:

Higher-level evidence generally supports more confident, widespread practice change, but EBP models emphasize that even top-tier evidence must still be weighed against clinical expertise and the individual patient's context — a systematic review's average result may not fit every patient in front of the nurse.

Quality Improvement vs. Research

These two activities are frequently confused but are distinct:

• Research generates new, generalizable knowledge intended to be published and applied beyond the setting where it was conducted; it typically requires formal Institutional Review Board (IRB) oversight and informed consent from subjects.
• Quality improvement (QI) takes existing, known best-practice evidence and applies a structured process (e.g., Plan-Do-Study-Act, PDSA cycles) to improve a specific process or outcome within a local unit or organization; it generally does not require IRB approval because it is not intended to produce generalizable new knowledge, only to improve local practice.

A unit-based project to reduce catheter-associated urinary tract infections (CAUTI) by improving adherence to an already-evidence-based insertion/maintenance bundle (see Chapter 7) is a QI project, not research — the practice itself (the bundle) is already established evidence; the project is about improving local compliance with it.

Bedside Clinical Inquiry in Practice

Progressive care nurses exercise Clinical Inquiry every time they ask "why do we do it this way?" about an established but unexamined routine — a fixed-schedule practice that could be individualized, a device left in place out of habit rather than active need (again tying to line/catheter necessity from Chapter 7), or an outdated protocol that newer evidence has superseded. Concrete bedside behaviors that demonstrate this competency include:

• Participating in unit-based QI councils or shared-governance committees.
• Bringing a clinical question to a nurse educator, clinical nurse specialist, or unit-based research champion rather than assuming nothing can change.
• Applying updated evidence-based bundles (e.g., updated sepsis-bundle timing, revised delirium-prevention protocols) as they are released rather than defaulting to "the way we've always done it."
• Contributing patient-response data and observations that inform whether a current protocol is actually working as intended.

This competency is why the PCCN blueprint treats Clinical Inquiry as a distinct, testable Professional Caring domain: certified progressive care nurses are expected to be active participants in improving practice, not passive followers of static protocols.