A nurse is caring for a client who requires emergency treatment for upper gastrointestinal bleeding. An NG tube is inserted, and gastric lavage is prescribed. Which of the following actions should the nurse take?

Place the client in a supine position during the lavage procedure.

Instill 400 mL of cold tap water into the stomach for the lavage.

Repeat the lavage until the gastric contents are yellow in color.

Inform the client the NG tube might remain in place for a few days.