The patient's tachycardia and hypotension following bowel resection surgery indicate potential severe complications such as hemorrhage or septic shock, which require immediate intervention. If the on-call surgical resident does not provide new orders, the nurse must act promptly to prevent further deterioration by initiating the rapid response team (RRT). The RRT can provide critical interventions and facilitate timely transfer to a higher level of care if needed. References: = CCRN Exam Handbook, AACN Adult CCRN Certification Review Course