Correct Answer: D

Rationale: The symptoms of swollen ankles, tight rings, and elevated blood pressure in a pregnant woman at 22 weeks gestation are concerning for preeclampsia. Preeclampsia is characterized by high blood pressure and signs of organ damage, commonly seen with symptoms such as swelling (edema) and protein in the urine. It is crucial to monitor and manage preeclampsia promptly as it can lead to severe complications for both the mother and the baby.

Correct Answer: A

Rationale: The most effective way to prevent cardiopulmonary arrest in a newborn is to ensure effective oxygenation and ventilation. This is crucial in maintaining adequate oxygen supply and preventing respiratory distress or failure, which are significant factors leading to cardiopulmonary arrest. Providing appropriate ventilation support and oxygenation can help sustain the newborn's vital functions and reduce the risk of cardiopulmonary compromise.

Correct Answer: D

Rationale: The length-based resuscitation tape measure is designed to estimate a child's weight based on their length and can be used for children weighing up to 75 pounds. It is a reliable tool for pediatric weight estimation in emergency situations.

Correct Answer: A

Rationale: According to the pediatric rule of nines, the head and neck represent 18%, the anterior chest and abdomen 18%, and each arm 9%. By adding these percentages (18% + 18% + 9% + 9% = 45%), we find that 45% of the total body surface area has been burned in this child.

Correct Answer: D

Rationale: The presence of a large contusion over the left upper quadrant of the abdomen, along with signs of shock, points towards a likely injury to the spleen, especially following trauma. The spleen is located in the left upper quadrant of the abdomen and is susceptible to injury due to its position and vulnerability to blunt trauma.