Coarctation of the aorta causes all of the following signs except:

Correct Answer: D

Rationale: Coarctation of the aorta is a congenital heart defect characterized by a narrowing of the aorta, the main artery carrying blood from the heart to the body. The signs of coarctation of the aorta include higher blood pressure in the upper extremities (Choice A) due to the narrowing of the aorta causing increased pressure proximal to the constriction. Right ventricular hypertrophy (Choice B) occurs as the heart works harder to overcome the obstruction in the aorta. Legs being cooler than arms (Choice C) is a result of decreased blood flow to the lower body due to the aortic narrowing. Hemodilution (Choice E) can occur as a compensatory mechanism in response to the increased blood pressure in the upper body. Nosebleeds (Choice D) are not typically associated with coarctation of the aorta but may occur due to other factors unrelated to this condition.

Correct Answer: A

Rationale: Imipramine (Tofranil) is a tricyclic antidepressant (TCA) that is commonly used to treat enuresis in children. Enuresis is a condition characterized by involuntary urination, especially observed during sleep in children who are old enough to have bladder control. Imipramine works by affecting the balance of certain neurotransmitters in the brain, which helps regulate the bladder and reduce involuntary urination. While imipramine has antidepressant properties, it is also effective in treating enuresis by reducing the frequency of bedwetting episodes.

Correct Answer: C

Rationale: Normal serum osmolality typically ranges between 280 to 295mOsm/kg. Serum osmolality reflects the concentration of solute particles in the blood, including sodium, glucose, and blood urea nitrogen. Sodium is a major determinant of serum osmolality, but it is not the only factor. In this case, since the patient's serum sodium is within the normal range, the nurse can reasonably estimate that the serum osmolality would fall within the normal range of 280 to 295mOsm/kg. Options A, B, and D are outside the typical range for serum osmolality in a healthy individual.

Correct Answer: A

Rationale: Myxedema coma is a severe form of hypothyroidism that can lead to life-threatening complications, including decreased level of consciousness, hypothermia, respiratory depression, and cardiovascular collapse. Rapid administration of thyroid hormone replacement therapy, such as levothyroxine, is crucial in the management of myxedema coma to reverse the underlying hypothyroid state and improve clinical outcomes. Therefore, administering an oral dose of levothyroxine is the most critical intervention needed for a client with myxedema coma. While warming the client with a warming blanket, measuring intake and output, and maintaining a patent airway are important aspects of care, they are not as directly related to the reversal of the underlying hypothyroid state in myxedema coma as administering levothyroxine.

Correct Answer: B

Rationale: It is important to note that exercise should not be completely avoided for a child with asthma. Regular physical activity is beneficial for overall health and can help improve lung function in asthmatic individuals. Supervised and controlled exercise under the guidance of healthcare providers can be safe for children with asthma. Avoiding exercise altogether can lead to deconditioning and other health issues. It is important to educate the family on the proper management of asthma during exercise, such as using a rescue inhaler before engaging in physical activity. Therefore, this statement indicates a need for further home care teaching.