The lifespan of care can not be summarized as an aspect of time, but from the initial medical evidence to the constant change of modern medicine and the period of development. The whole medical field including nursing skills never stops when new technologies are introduced, and there has never been a moment to put the future research into practice. "Virginia Henderson says,"
Not all nursing theories are unique nursing theory, many of which borrow and share with other fields. The theory developed by Neumann, Watson, Perth, Orlando, and Pepla is regarded as a unique nursing theory. Nurses borrowed theories and concepts derived from the relevant science to explain and explore the unique phenomena of care. The meticulous attention theory has the broadest scope and presents general concepts and propositions. This level of theory can provide reflection on practice and useful insight, but it is not designed for empirical testing. This limits the use of large-scale care theory to guide, interpret and predict care in certain situations. However, these theories may include concepts that can be used for empirical testing. This level of theory relates to all treatment examples.
The scope of the midrange nurse theory is narrower than the big nurse theory and provides an effective bridge between big nurse theory and nursing practice. They propose lower levels of concept and abstraction, leading theoretical research and nursing practice strategies. Compared to macro theory, one of the outstanding features of the mid-term theory is that the midrange theory is clearer and verifiable through testing. The function of middle layer theory includes description, interpretation or prediction of phenomena. The theory of the intermediate range is straightforward and generally takes into account a limited number of variables and limited reality.