Final answer:
In this case, the appropriate action would be to notify the healthcare provider immediately and assess the client's respiratory status.
Step-by-step explanation:
In this case, the appropriate action would be to Notify the healthcare provider immediately and assess the client's respiratory status. A chest tube with 150 mL of bright-red blood in the collection chamber from the past hour indicates active bleeding, which is not a normal postoperative occurrence. It is important to notify the healthcare provider immediately to ensure prompt evaluation and intervention.