Final answer:
The nurse's primary purpose in reading nursing research is to maintain an evidence-based practice.
Step-by-step explanation:
The nurse's primary and most essential purpose in reading nursing research on a regular basis is to maintain an evidence-based nursing practice. By staying up-to-date with the latest research findings, nurses can ensure that their practice is based on the best available evidence, leading to improved patient outcomes. Reading nursing research also helps nurses stay informed about new interventions, treatments, and techniques that can enhance their practice.