The nurse caring for a 22-pound 1-year-old child who has had open heart surgery is aware that the minimum acceptable urine output for the child

A. Positive Western blot test: A positive Western blot test confirms HIV infection but doesn't provide information about the current immune status or progression of the disease.

B. CD4-T-cell count 180 cells/mm³.

The CD4-T-cell count is a crucial indicator of a person's immune system function, and it's a primary marker used to monitor the progression of HIV infection. A CD4 count of 180 cells/mm³ is significantly below the normal range (which is typically higher), indicating immunosuppression and an increased risk of opportunistic infections. Maintaining and improving immune function is a top priority in the care of clients with HIV.

C. Platelets 150,000/mm³: Platelet counts are important, but they are not the primary indicator for assessing the progression of HIV.

D. WBC 5.000/mm³: The white blood cell count (WBC) is important for assessing overall immune function, but it doesn't provide the same specific information about the immune system status as the CD4-T-cell count.

A. Shunted past the pulmonary circulation, causing pulmonary hypoxia: This option is not the primary reason for dyspnea in PDA. While there is shunting, it doesn't directly cause pulmonary hypoxia.

B. Circulated through the lungs again, causing pulmonary circulatory congestion: This option is partially correct but does not address the primary reason for dyspnea, which is the bypassing of the left side of the heart.

C. Circulated through the ductus from the pulmonary artery to the aorta, bypassing the left side of the heart.

In patent ductus arteriosus (PDA), a fetal blood vessel called the ductus arteriosus fails to close after birth. This allows oxygenated blood from the left atrium to be shunted directly from the aorta to the pulmonary artery, bypassing the normal route through the left side of the heart and into the systemic circulation. The shunting of oxygenated blood back into the pulmonary circulation can lead to increased pulmonary blood flow and circulatory congestion, causing symptoms such as dyspnea.

D. Shunted past cardiac arteries, causing myocardial hypoxia: PDA primarily affects the pulmonary circulation and left side of the heart, not the coronary arteries. Myocardial hypoxia is not the primary mechanism of dyspnea in PDA.