A client has consented to have a central venous catheter placed.

(A) The subclavian vein is not visible during central line insertion regardless of the client’s position. (B) The Trendelenburg position reduces the possibility of air embolism because it places slight positive pressure on the central veins. It also distends the veins, and distention facilitates insertion. (C) This response is untrue; it has no effect on hematoma formation. (D) This position is not necessarily more comfortable for the client, and many clients, especially those who may be short of breath, may find the position uncomfortable and difficult to maintain.