Situation: A 64-year-old man is in the intensive care unit (ICU) on day 2 after emergency intubation for severe community-acquired pneumonia. He is sedated with a propofol infusion and receives mechanical ventilation. His care team includes ICU nurses, a resident, an attending intensivist, respiratory therapists and the hospital dialysis nurses who treat ICU clients. At 02:00 the next night, the nurse tells the resident by telephone that the client's blood pressure has fallen from 118/70 to 86/50 mmHg over the past hour and that his urine output has been 15 mL/h for 2 hours. The resident says to continue monitoring. The nurse restates the findings and asks the resident to see the client, but the resident again declines. What should the nurse do NEXT?

The nurse has voiced a safety concern twice and been dismissed. Under the two-challenge rule, the nurse now takes the concern to the next level of authority through the chain of command (charge nurse, then supervisor or attending physician as policy allows) and documents the communication. Client safety outranks avoiding conflict with a colleague.

Why the answer is 2 (Notify the charge nurse, following the chain of command)

The nurse has already voiced a serious safety concern twice, and the resident has dismissed it both times. This is exactly the situation the two-challenge rule is designed to address. The rule states that when a team member raises a concern about patient safety and the response does not resolve the concern, the team member states the concern a second time, and if it is still not addressed, the concern must be escalated to the next level of authority. Client safety always takes priority over avoiding conflict with a colleague or preserving hierarchy.

In this case, the findings are not subtle. The blood pressure has fallen from 118/70 mmHg to 86/50 mmHg over one hour, and urine output has been 15 mL/h for two hours. That urine output is well below the minimum expected 0.5 mL/kg/h for an adult and signals hypoperfusion and possible evolving acute kidney injury (AKI). The nurse correctly restated the findings and asked the resident to assess the client, but the resident declined again. At that point, the nurse has met the two-challenge threshold and must move up the chain of command.

Key point! The chain of command in a hospital escalation typically begins with the charge nurse, then the nursing supervisor, and then the attending physician or rapid response team, depending on institutional policy. The nurse should also document the communication, including the resident’s response, in the medical record.

Why the other options are incorrect

Option 1 (call the resident again in 30 minutes with new vital signs) and option 3 (record the resident’s instructions and recheck in 1 hour) both delay escalation. The client is already showing signs of hemodynamic instability and reduced end-organ perfusion. Waiting another 30 to 60 minutes without a higher-level review risks further deterioration. A falling blood pressure combined with oliguria in an ICU client is a time-sensitive warning, not a routine observation to be rechecked later.

Option 4 (increase the intravenous fluid rate using nursing judgment) is not appropriate as the next independent action. Fluid administration is a medical intervention that requires a provider order, and in this clinical picture the cause of hypotension is not yet confirmed. The client could be hypovolemic, but could also be developing septic shock with vasodilation, or a cardiogenic component. Giving fluid without a provider assessment could worsen the client’s condition if the problem is not purely volume depletion.

Clinical reasoning: hypotension and oliguria in the ICU

The combination of hypotension and low urine output points to inadequate renal perfusion. In adults with acute illness, a urine output below 0.5 mL/kg/h for two hours is a functional marker of reduced kidney blood flow and is part of the diagnostic criteria for AKI. When hypovolaemia is the major risk factor, early recognition and correction of the perfusion deficit are essential because both insufficient and excessive fluid can increase morbidity and mortality ^[1].

In the ICU, AKI is common and is associated with longer hospital stays and higher mortality, and it frequently requires nephrology consultation or renal replacement therapy ^[2]. The nurse’s role is to detect the early warning signs and escalate promptly so that the team can assess fluid status and intervene before irreversible organ damage occurs. This is why the nurse’s repeated attempts to notify the resident were correct, and why moving up the chain of command is the required next step.

Watch out! Do not confuse the two-challenge rule with simply repeating the same request. The rule requires a second, assertive statement of the concern, and if the response is still inadequate, escalation must occur. In a licensure examination, any option that keeps the nurse waiting without involving a higher authority after two failed attempts is generally incorrect.