The nurse knows which congenital cardiac defect is characterized by a mixing of well-oxygenated blood with poorly oxygenated blood.

A. Once I am fitted for the diaphragm it will always be the correct size. Incorrect because weight changes, pregnancy, or pelvic surgery may require refitting.
B. I need to leave the diaphragm in for six hours after the last act of intercourse. This is correct to ensure that all sperm are inactivated.
C. This contraceptive can be used during menstruation. Incorrect because it's generally not recommended to use the diaphragm during menstruation due to increased risk of infection.
D. I can leave the diaphragm in for a day or two. Incorrect because leaving it in for more than 24 hours can increase the risk of infection, including toxic shock syndrome.

A. "Apply cold compresses when your child expresses pain." Cold can cause vasoconstriction, which may precipitate a sickle cell crisis by reducing blood flow to the extremities, thus increasing the risk of sickling of red blood cells. Warm compresses are recommended to help alleviate pain by promoting blood flow.
B. "Restrict outdoor play activity to 1 hour per day." While it's important to monitor physical activity to avoid overexertion, restricting outdoor play to a specific time frame without considering other factors like hydration and rest isn't the right approach. Physical activity is important but should be balanced with adequate hydration and rest.
C. "Monitor your child's temperature daily." While monitoring temperature is important, it isn't specifically critical on a daily basis unless there is a suspicion of infection. The primary focus should be on hydration and recognizing signs of infection.
D. "Offer fluids to your child multiple times every day." Hydration is crucial for children with sickle cell anemia as it helps to prevent sickling of cells by maintaining good blood flow and preventing dehydration, which can trigger a crisis.