Which ethical principle protects clients from harm?

It can be processed and stored for up to ten years: The storage duration of recovered tissue depends on the specific type of tissue and the storage methods. While some tissues can be stored for extended periods, the statement is overly generalized and may not apply to all types of tissue.

Recovered pediatric heart valves can be used in the elderly: This statement is true. Heart valves from pediatric donors can often be used in elderly patients. The size and quality of the valves are important factors, and pediatric valves can be resized for transplantation into older recipients.

A transplanted kidney must be replaced every year: This statement is false. Kidney transplants are intended to be permanent solutions. While there can be complications or issues that might require medical attention, replacing the kidney every year is not a standard or necessary practice.

Because the cause of death of the donor is known, testing for disease is not necessary: This statement is false. Even if the cause of death is known, rigorous testing for diseases, especially communicable diseases, is essential to ensure the safety of the transplant recipient. Testing helps prevent the transmission of infections from the donor to the recipient.

A) An accepted method for understanding the world and what is in it: This option is a general description of theory but does not specifically define middle-range theory. Middle-range theory is a specific type of theory within the nursing field.

B) An in-depth review of the literature concerning a particular item of study: This option describes a literature review, not a middle-range theory. While literature reviews are an essential part of developing theories, they are not the definition of a middle-range theory.

C) A set of relatively concrete concepts that lie between minor working hypotheses: Middle-range theories are more specific and focused than grand theories but broader than minor working hypotheses. They consist of concrete concepts and propositions that help explain and predict limited aspects of nursing practice. They serve as bridges between theoretical nursing models and actual nursing practice.

D) An organized unit with a set of components that interact and affect each other, a system that acts as a whole: This option describes a general concept of a system but does not specifically define middle-range theory.