The nurse knows that which of the following is not a cause of mastitis?

A. Hypoplastic heart syndrome: Characterized by underdevelopment of the left side of the heart, not mixing of blood.
B. Atrioventricular canal defect: An atrioventricular canal defect allows oxygenated and deoxygenated blood to mix due to the presence of a common atrioventricular valve and defects in the atrial and ventricular septa. This defect results in a mixture of oxygenated and deoxygenated blood, which can cause varying levels of oxygenation in the blood delivered to the body.
C. Tetralogy of Fallot: Involves a ventricular septal defect leading to right-to-left shunting, but not a direct mixing of oxygenated and deoxygenated blood.
D. Coarctation of the aorta: Involves narrowing of the aorta, not mixing of oxygenated and deoxygenated blood.

A. Substance use. Parents or caregivers who use substances are more likely to abuse children due to impaired judgment and increased stress levels.
B. Extreme stress. High levels of stress in the family can increase the risk of child abuse as it can lead to frustration and inappropriate coping mechanisms.
C. High socioeconomic background. This is not typically associated with increased risk of child abuse; abuse can occur across all socioeconomic levels, but certain stressors are more prevalent in lower socioeconomic contexts.
D. Strong support system. A strong support system typically acts as a protective factor against child abuse by providing resources and emotional support to caregivers.
E. Prematurity. Premature infants often have increased care needs, which can lead to parental stress and potential abuse.
F. Chronic illness. Children with chronic illnesses may require more care, leading to caregiver stress and higher risk of abuse.