A client is having a peritoneal dialysis treatment. The nurse notes an opaque color to the effluent. What is the priority action by the nurse?

Warm the dialysate solution in a microwave before instillation

Flush the tubing with normal saline to maintain patency of the catheter.

Obtain a sample of the effluent and send to the laboratory.

Check the peritoneal catheter for kinking and curling.