Final answer:
The most appropriate action is for the RN to advise the LPN to contact the healthcare provider immediately and update on the client's condition.
Step-by-step explanation:
The most appropriate action for the RN to take in this situation would be Option 3: Advise the LPN to contact the healthcare provider immediately and update on the client's condition.
Elevated vital signs, pain, and dyspnea in a fresh postoperative client can indicate potential complications or the need for further medical intervention. Therefore, it is crucial for the RN to escalate the situation and involve the healthcare provider to ensure appropriate assessment and treatment.
By contacting the healthcare provider, the RN can provide pertinent information regarding the client's symptoms, allowing for timely evaluation and intervention, if necessary.