The nurse teaches a pregnant woman about the presumptive, probable, and positive signs of pregnancy.
The woman demonstrates understanding of the nurse's instructions if she states that a positive sign of pregnancy is:.

Choice A rationale:
Correction of acidosis is not the primary intervention for vaso-occlusive sickle cell crisis. The crisis primarily involves pain due to the obstruction of blood flow by sickled cells. Correcting acidosis is not a direct treatment for this condition.
Choice B rationale:
Adequate hydration is essential in managing vaso-occlusive sickle cell crisis. Proper hydration helps prevent dehydration, which can worsen the crisis and lead to complications. Hydration helps maintain blood flow and prevent further sickling of red blood cells.
Choice C rationale:
Pain management is a crucial intervention for a child with vaso-occlusive sickle cell crisis. Pain results from tissue ischemia caused by sickled red blood cells. Effective pain management, often with analgesics, helps improve the child's comfort and quality of life during the crisis.
Choice D rationale:
Administration of heparin is not indicated for vaso-occlusive sickle cell crisis. Heparin is an anticoagulant that prevents blood clot formation. In sickle cell crisis, the primary issue is the obstruction of blood flow by sickled cells, not the formation of clots. Administering heparin may not address the underlying problem and can lead to potential complications.
Choice E rationale:
Replacement of factor VIII is not relevant to vaso-occlusive sickle cell crisis. Factor VIII is a protein involved in blood clotting and is primarily used in the treatment of hemophilia, a different condition unrelated to sickle cell crisis.

Choice A rationale:

The cuff labeled "toddler" is an appropriate criterion for selecting the right-sized blood pressure cuff for a 2-year-old boy. Pediatric blood pressure cuffs are available in different sizes, and using a cuff specifically labeled for toddlers ensures a proper fit and accurate blood pressure measurement.

Choice B rationale:

The cuff bladder width being approximately 40% of the circumference of the upper arm is a correct criterion. Using a cuff with an appropriate width ensures that the cuff covers a significant portion of the upper arm, allowing for accurate blood pressure measurement. A cuff that is too narrow or too wide can lead to inaccurate readings.

Choice C rationale:

The cuff bladder length covering 80% to 100% of the circumference of the upper arm is an incorrect criterion. The length of the cuff bladder should cover about 80% of the upper arm's circumference, not 80% to 100%. Using a cuff that is too long can result in falsely low blood pressure readings.

Choice D rationale:

The cuff bladder covering 50% to 66% of the length of the upper arm is an incorrect criterion. The bladder width, which covers the circumference of the upper arm, is more critical than the length. The width should be approximately 40% of the upper arm's circumference for accurate blood pressure measurement in children.