Great question Lyudmyla- check out this article I recently wrote- it is exactly about the conceptual model for nursing informatics research. Let me me know if you have any questions!
Topaz, M. (2013). The Hitchhiker’s Guide to nursing informatics theory: using the Data-Knowledge-Information-Wisdom framework to guide informatics research. Online Journal of Nursing Informatics (OJNI), 17 (3). Available at http://ojni.org/issues/?p=2852
I'm sharing my conceptual models developed from nursing informatics literature review that may serve as reference in answering your question on model for the organizing framework for nursing informatics research.
I am researching this for my thesis and leaning toward Complexity Science & Complex Adaptive Systems. I will share the synthesis paper I wrote for my research class. It may be amateur but crowd-sourcing is the best way to improve.