Cystic Fibrosis (CF) is a disease that has profound consequences on a family unit. As a genetically transmitted, chronic illness, it influences every aspect of family life, including time constraints, finances, and relationships among family members. The purpose of this article is to demonstrate the cumulative effect of the nursing diagnoses related to the pathophysiology of CF on the nursing diagnosis, Potential for Alterations in Family Process, when a family has a child with cystic fibrosis. This nursing diagnosis was first recognized by the North American Nursing Diagnosis Association (NANDA) in 1982. It is vital that nurses be able to differentiate between a family having difficulty coping with a child with CF in the home, and one that is coping well on its own. The children of families that are not coping well tend to be hospitalized more than those of families that are coping well. The families use the hospitalizations as rest periods for themselves. By recognizing the cues identified by NANDA of a family having problems, early intervention can be initiated before the family is in a crisis. The family must live with CF on a daily basis for the remainder of the child's life; therefore it must be able to function at its optimum level. It is nursing's responsibility to be able to recognize and assist the family in need. A knowledge of the nursing diagnosis, Alterations in Family Process, will assist nurses in fulfilling this obligation to the family.