A nurse is caring for a client who has a central venous catheter and reports hearing a gurgling sound on the side of the catheter insertion. Which of the following complications should the nurse suspect?

The correct answer is C: Catheter dislodgment. The gurgling sound indicates air in the catheter, which is likely due to the catheter becoming dislodged from its original placement. This can lead to air entering the bloodstream, potentially causing serious complications. Catheter occlusion (A) would present with resistance to flush, not gurgling sounds. Catheter migration (B) involves movement of the catheter within the vessel, not air entry. Catheter rupture (D) would typically present with leaking of fluid, not gurgling sounds.