In the words of Linda Smith and her daughter, Hannah: It is easier to change policy than biology. I can't imagine a professional nurse who is not working to develop and implement theory-driven, research-based policies. Anything less is considered unprofessional in current nursing literature. What theory/conceptual framework and what supporting research does this nurse manager use to support current unit policy? Ask her--in writing--with a notation that copies are being sent to the VP of Nursing, the Quality Improvement honcho, the hospital administrator, etc. You can be gentle yet assertive, e.g. curiosity as it conflicts with research reports you've read, etc. Good luck. Theoretically this is a sound suggestion! Karen