A nurse is providing preoperative teaching for a client who is scheduled for a gastrectomy. Which of the following information regarding the prevention of postoperative complications should the nurse include in the teaching?

The correct answer is B: Instruct the client about the use of a sequential compression device. This is important for preventing postoperative complications like deep vein thrombosis (DVT) by promoting circulation in the lower extremities. Discussing the visitation policy (A) is not directly related to preventing postoperative complications. Teaching the client how to use the PCA pump (C) is important for pain management but not specifically for preventing complications. Reviewing the pain scale (D) is crucial for pain assessment but does not directly address postoperative complications.