Which complication is NOT commonly associated with central venous catheters?

When considering the complications associated with central venous catheters, understanding the nature and risks involved is essential. While infection, pneumothorax, and thrombosis are well-documented complications that can occur with central venous catheter placement, rupture of a central vein is less commonly associated and thus makes it the correct choice for being "NOT commonly associated."

Infection is a prevalent risk due to the catheter's direct access to the bloodstream, providing a pathway for bacteria to enter. Pneumothorax can occur during the placement of the catheter, particularly when it is inserted into the subclavian vein, as the needle may inadvertently puncture the pleura, leading to air in the pleural space. Thrombosis refers to the formation of a blood clot within the vein, which can obstruct blood flow and is another recognized risk with central lines.

Rupture of a central vein, while a serious complication, is significantly less frequent and usually occurs under specific circumstances, such as improper technique or the presence of disease affecting the vessel integrity. Thus, it stands apart from the other complications and makes it clear why this option is not commonly associated with central venous catheters.