After returning from cardiac catheterization, the nurse determines that the pulse distal to the catheter insertion site is weaker. The nurse should do which of the following?

Correct Answer: B

Rationale: The correct answer is B, Notify practitioner of the observation. This is the most appropriate action because a weaker pulse distal to the catheter insertion site could indicate impaired circulation, potentially leading to complications like ischemia. Notifying the practitioner promptly allows for a timely assessment and intervention to prevent further complications. Elevating the affected extremity (A) may worsen circulation, recording data (C) is important but not as urgent as notifying the practitioner, and applying warm compresses (D) is not indicated for this situation and could exacerbate any circulatory issues.

Correct Answer: A

Rationale: The correct answer is A: Susceptibility to respiratory infection. Children with congenital heart disease often have compromised immune systems due to their cardiac condition, making them more prone to respiratory infections. This is because the heart defect can affect blood flow to the lungs, leading to decreased oxygen levels and weakened lung function. As a result, these children are at higher risk for respiratory complications. Incorrect choices: B: Bleeding tendencies - While some heart conditions may lead to clotting issues, bleeding tendencies are not a frequent complication of congenital heart disease. C: Frequent vomiting and diarrhea - These symptoms are not typically associated with congenital heart disease, unless there are specific underlying conditions causing them. D: Seizure disorder - Seizures are not a common complication of congenital heart disease; they are more often related to neurological issues or other medical conditions.

Correct Answer: D

Rationale: The correct answer is D: leukocytes. Leukocytes are a general term encompassing all white blood cells, which play a crucial role in the immune system. They are responsible for defending the body against infections and foreign invaders. Hematopoietic cells (A) refer to the cells that give rise to all blood cells, including red and white blood cells. Myeloid progenitors (B) are specific progenitor cells that give rise to certain types of white blood cells, red blood cells, and platelets. Dendritic cells (C) are a specific type of white blood cell that plays a key role in the immune response by presenting antigens to other immune cells. Overall, leukocytes are the most appropriate term to describe all white blood cells due to their broad and inclusive nature in the immune system.

Correct Answer: D

Rationale: The correct answer is D because helper T cells do not directly kill pathogen-infected cells. Helper T cells assist in coordinating the immune response by activating other immune cells. T-cell activation involves cell division and differentiation (Choice A), effector B cells differentiate into plasma cells to secrete antibodies (Choice B), and plasma cells are responsible for antibody secretion (Choice C). Therefore, the mismatched pair is helper T cell: kills pathogen-infected cells.

Correct Answer: D

Rationale: The correct answer is D. Blood type O individuals can only receive blood type O due to the presence of antibodies against blood types A and B. Since blood type O lacks A and B antigens, it is safe for individuals with blood type O to receive only blood type O. Choice A (A) contains A antigens, choice B (B) contains B antigens, and choice C (AB) contains both A and B antigens, making them incompatible with blood type O.