11.3 Recognizing Deterioration & Escalation of Care

Early Warning Scores: MEWS and NEWS

Most in-hospital cardiac arrests are preceded by hours of measurable physiologic decline. Early warning scores (EWS) convert routine vital signs into an objective trigger for escalation, removing the subjectivity of "the patient doesn't look right."

The Modified Early Warning Score (MEWS) scores five parameters: respiratory rate, heart rate, systolic blood pressure, temperature, and level of consciousness (using AVPU — Alert, responds to Voice, responds to Pain, Unresponsive). The National Early Warning Score (NEWS/NEWS2) adds oxygen saturation (SpO2) and whether the patient is receiving supplemental oxygen. Each parameter scores 0–3 points from normal to severely abnormal; the scores are summed.

Trigger actions: a total NEWS ≥5 (or a single parameter scoring 3) prompts urgent reassessment and provider notification; higher scores (commonly ≥7) mandate emergency response — critical care evaluation or rapid response activation — with continuous monitoring. Scores also dictate monitoring frequency: low scores permit routine vitals, rising scores demand every 1–4 hour or continuous observation. The key exam principle: the score drives the action, not the nurse's comfort level, and a rising trend matters as much as an absolute value.

Subtle Signs of Deterioration

Examiners love the "soft" signs because they appear hours before the crash.

• Restlessness, agitation, anxiety, or new confusion is often the FIRST sign — of hypoxia, hypoperfusion, hypoglycemia, sepsis, or electrolyte disturbance. Never dismiss a new behavior change as "sundowning" or anxiety without a physiologic workup; acute confusion in an older adult is delirium until proven otherwise.
• Rising respiratory rate is the single earliest vital-sign change, often climbing 8–24 hours before cardiac arrest, and it is the most frequently omitted or inaccurately recorded vital sign. Count a full 60 seconds for any patient who looks unwell.
• Tachycardia precedes hypotension. A sustained heart rate above 100–110 is the compensatory response to hypovolemia, bleeding, sepsis, or PE; blood pressure stays normal until compensation fails — by which point the patient may have lost 30% of circulating volume. A "normal" BP with a rising heart rate and falling urine output is a deteriorating patient.
• Oliguria (urine output <0.5 mL/kg/hr, roughly <30 mL/hr) signals inadequate renal perfusion and often appears before hypotension in sepsis and hypovolemia.
• Cool, mottled, or clammy skin and delayed capillary refill reflect peripheral vasoconstriction shunting blood to vital organs.
• New oxygen requirement — needing more O2 to maintain the same SpO2 — is a red flag even when saturation numbers still look acceptable.
• Rising lactate (≥2 mmol/L abnormal; ≥4 mmol/L critical in sepsis screening) quantifies tissue hypoperfusion.
• "Worried" criterion: nurse or family concern is a legitimate, evidence-supported trigger for rapid response even when vital signs are technically stable.

Sepsis Screening Triggers

Screen every deteriorating patient. Systemic Inflammatory Response Syndrome (SIRS) criteria: temperature >38.3°C or <36°C, heart rate >90, respiratory rate >20 (or PaCO2 <32), WBC >12,000 or <4,000 (or >10% bands) — two or more with a suspected source equals sepsis. qSOFA (quick Sequential Organ Failure Assessment) is the bedside screen: respiratory rate ≥22, altered mentation (GCS <15), systolic BP ≤100 mm Hg — two or more predicts poor outcome. The Surviving Sepsis Campaign Hour-1 bundle: measure lactate, obtain blood cultures before antibiotics, administer broad-spectrum antibiotics, give 30 mL/kg crystalloid for hypotension or lactate ≥4, and start vasopressors (norepinephrine first-line) if MAP remains <65 mm Hg.

Rapid Response Team vs. Code Blue

The rapid response team (RRT) — typically a critical care nurse, respiratory therapist, and provider — exists to intervene before arrest. Anyone, including the bedside nurse and in many hospitals the family, may activate it.

Typical RRT activation criteria:

• Respiratory rate <8 or >30 breaths/min (some systems use >28–36), SpO2 <90% despite oxygen, or new stridor/airway threat
• Systolic BP <90 mm Hg (or sustained drop >40 from baseline), heart rate <40 or >130
• Acute change in level of consciousness or new agitation/confusion, new seizure
• Urine output <30 mL/hr for 4 hours (some criteria)
• Chest pain, signs of stroke (new focal deficit), uncontrolled bleeding
• Staff member is worried about the patient

A code blue is for a patient who is unresponsive, apneic, or pulseless — respiratory or cardiac arrest — activating the full resuscitation team and cart. The distinction the exam tests: RRT = the patient is deteriorating but still has a pulse and is breathing; code blue = arrest. When in doubt and the patient has a pulse, call the RRT — it is never wrong to escalate early.

SBAR: Structured Escalation Communication

SBAR (Situation, Background, Assessment, Recommendation) standardizes the handoff to the provider so nothing is omitted:

• Situation: who you are, the patient, and the problem in one sentence — "Mr. D in 412 has a respiratory rate of 34 and new confusion."
• Background: admission diagnosis, relevant history, code status, pertinent medications, baseline vitals.
• Assessment: current focused findings and vital-sign trend with the early warning score — "NEWS is 9, up from 3 at 0800; lactate is 4.2."
• Recommendation/Request: what you need and when — "Please evaluate him within the next 15 minutes; should I activate the rapid response team or draw blood cultures?"

When you are alarmed and not being heard, use CUS words: "I am Concerned, I am Uncomfortable, this is a Safety issue." These graded-assertiveness phrases are designed to stop the line. Read back any telephone orders, and document the name of every person notified and the time.

Nurse-Driven Protocols

Boards increasingly test autonomous nursing action. Many units have standing protocols allowing the nurse to initiate interventions before a provider evaluates the patient: obtaining a STAT ECG for chest pain, ordering/drawing a lactate level and blood cultures and initiating a sepsis bundle when screening is positive, applying oxygen to maintain a target SpO2, initiating stroke-alert workflows, or activating the RRT. Acting within a nurse-driven protocol is practicing to the top of the license — delaying time-critical interventions (antibiotics in sepsis, aspirin in acute coronary syndrome) while waiting for a callback worsens outcomes.

Chain of Command When Concerns Are Dismissed

If the responding provider minimizes your findings or fails to respond, you are obligated to escalate — advocacy outranks hierarchy:

1. Restate the concern with objective data (trends, scores, "worried" criterion, CUS language).
2. If unresolved, contact the charge nurse, then the house supervisor/nursing administrator.
3. Escalate medically: attending physician → department chair/chief medical officer; activate the RRT independently — it requires no provider order.
4. Continue until a qualified clinician evaluates the patient. Fear of conflict is never a reason to stop; failure to rescue is a leading cause of preventable death.

Documentation of Escalation

Document factually and chronologically: the assessment findings and vital-sign trends that prompted concern, the early warning score, each notification (name, time, read-back of orders), the response received or the absence of response, each escalation step up the chain, interventions performed and the patient's response, and family communication. Objective, timestamped documentation is both the clinical record and your legal protection — it demonstrates that deterioration was recognized and escalated appropriately. Avoid judgmental language ("Dr. X refused to come"); record what was said and done.