Patient Safety & Systems-Based Practice

Rapid response and code teams: activation criteria

Clinical Overview and When to Suspect Deterioration

— RRT (Medical Emergency Team, MET): activated for pre-arrest physiologic instability; goal is to prevent ICU transfer or cardiac arrest.

— Code Blue: activated for cardiopulmonary arrest (pulselessness, apnea) — initiates ACLS.

— Acute change in mental status (agitation, lethargy, new confusion)

— Tachypnea (RR >28 or <8), hypoxemia (SpO₂ <90% on supplemental O₂)

— Hypotension (SBP <90 or drop >40 from baseline), tachycardia >130, bradycardia <40

— New chest pain, threatened airway, seizure, uncontrolled bleeding

— Nurse or family "worry" — a validated subjective trigger in nearly all RRT criteria sets

Board pearl: The single most predictive vital sign for impending arrest on the ward is respiratory rate — yet it is the most frequently missed or fabricated in documentation. A patient with RR 30 and "stable" charting is a classic stem.

Key distinction: RRT = pre-arrest rescue (patient still has pulse and may be talking); Code Blue = arrest already occurred. Calling Code Blue on a hypotensive but conversant patient is incorrect escalation; calling RRT on an apneic pulseless patient delays ACLS.

Rapid Response Teams (RRTs) and Code Blue teams are hospital-based systems designed to bring critical care expertise to the bedside before or during catastrophic deterioration on general wards.

Rationale: up to 70% of in-hospital cardiac arrests are preceded by 6–8 hours of documented abnormal vitals ("failure to rescue"). Early activation reduces non-ICU arrests and hospital mortality.

When to suspect a deteriorating patient:

Early Warning Scores (NEWS2, MEWS) aggregate vitals into a numeric trigger; NEWS2 ≥5 should prompt urgent clinician review, ≥7 prompts critical care response.

System role on Step 3: RRT is a patient safety infrastructure, embedded in Joint Commission's National Patient Safety Goals and the IHI 100,000 Lives Campaign.

Presentation Patterns and Key History

— Post-operative day 1–3 patient with rising RR, low-grade fever, and subtle hypoxemia → PE, pneumonia, atelectasis, sepsis

— Elderly inpatient on opioids/benzodiazepines becoming somnolent with RR 8 → iatrogenic respiratory depression

— Cirrhotic with GI bleed showing SBP drop from 130 → 95 with HR 118 → occult hemorrhage

— Diabetic patient with altered mental status and glucose 38 → hypoglycemia

— Telemetry patient with new sustained VT or symptomatic bradycardia

— Post-contrast or post-antibiotic patient with stridor, urticaria, hypotension → anaphylaxis

— Recent surgery, recent extubation, recent transfusion

— Known difficult airway, OSA, morphine-equivalent opioid dose escalation

— Sepsis bundle in progress, lactate trending up

— Code status uncertainty — clarify before crisis, not during

Step 3 management: When the stem describes a patient with worsening vitals over hours and the choices include "reassess in 1 hour," "order stat labs," or "activate rapid response" — activate the RRT. Delayed activation is the wrong answer even if labs are pending. Concurrent action (call team + send labs) beats sequential.

Board pearl: Family-activated rapid response ("Condition H" for Help) is now standard at many academic centers — empowered after the Josie King case (Johns Hopkins, 2001), a landmark patient safety event commonly referenced in systems-based questions.

Classic RRT activation scenarios on Step 3 stems:

Historical red flags that should lower the threshold to activate:

Trajectory matters more than the absolute number. A patient whose SBP has drifted from 140 → 110 → 95 over 3 hours is more concerning than a chronically hypotensive cirrhotic at SBP 95.

The "nurse intuition" trigger: when a bedside nurse says "something is wrong" without a clear vital abnormality, RRT activation is appropriate and supported by Joint Commission.

Physical Exam Findings and Hemodynamic Assessment

— Airway: patency, stridor, gurgling, ability to speak in full sentences

— Breathing: RR, SpO₂, accessory muscle use, breath sounds (asymmetry → pneumothorax, effusion), tracheal deviation

— Circulation: HR, BP, capillary refill, skin temperature/mottling, JVP, peripheral pulses, telemetry rhythm

— Disability: GCS, pupils, focal deficits, glucose (always check — "Don't ever forget glucose")

— Exposure: full skin survey for rash (anaphylaxis, purpura), surgical site bleeding, decubitus, line/drain output

— Warm + hypotensive → distributive (sepsis, anaphylaxis, neurogenic)

— Cold + hypotensive + elevated JVP → cardiogenic

— Cold + hypotensive + flat JVP → hypovolemic/hemorrhagic

— Cold + hypotensive + elevated JVP + clear lungs → obstructive (tamponade, PE, tension PTX)

— Cycle BP on manual cuff (auto cuffs unreliable at extremes)

— 12-lead ECG if any chest pain, dyspnea, or arrhythmia suspected

— Point-of-care glucose, lactate if available

— Bedside ultrasound (RUSH/FAST) where available — increasingly tested

CCS pearl: On CCS cases, ordering "vital signs q15min," "continuous pulse oximetry," "continuous cardiac monitoring," and "IV access x2 large bore" simultaneously at the time of deterioration scores higher than a stepwise approach. These are concurrent, not sequential, orders.

Key distinction: A patient with shock and elevated JVP narrows your differential to cardiogenic vs obstructive — not septic or hemorrhagic. This single physical finding redirects the entire resuscitation pathway.

Primary survey at the bedside (ABCDE) mirrors ATLS/ACLS framing and is the expected Step 3 approach when arriving at an RRT:

Hemodynamic phenotyping at first contact guides initial therapy:

Key bedside maneuvers within 2 minutes:

Diagnostic Workup — Initial Labs, Imaging, ECG, Biomarkers

— Point-of-care glucose

— 12-lead ECG (rhythm, ischemia, QT, electrolyte signatures)

— ABG or VBG with lactate (acid-base, gas exchange, perfusion)

— CBC, BMP, magnesium, phosphorus, calcium, coags (PT/INR, aPTT)

— Type and screen if bleeding suspected; cross-match if active hemorrhage

— Troponin if chest pain, dyspnea, or hemodynamic instability

— Blood cultures x2 before antibiotics if sepsis suspected (do not delay antibiotics >1 hour for cultures)

— Lactate (>2 mmol/L = tissue hypoperfusion; >4 = severe, mandates aggressive resuscitation)

— Portable CXR: nearly universal in respiratory deterioration (pneumothorax, pulmonary edema, consolidation, line/tube position)

— CT-PA if PE suspected and patient stable enough

— Bedside echo for unexplained shock (RV strain → PE; pericardial effusion → tamponade; global hypokinesis → cardiogenic)

— FAST if blunt trauma or unexplained hypotension post-procedure

— STEMI → cath lab activation

— Wide-complex tachycardia → treat as VT until proven otherwise

— Peaked T waves, wide QRS → hyperkalemia (give calcium gluconate first)

— Diffuse ST depression with aVR elevation → left main or 3-vessel disease

Board pearl: Lactate clearance (>10% over 2 hours) is the most validated bedside surrogate for adequate resuscitation in septic shock — outperforming MAP alone.

Step 3 management: Sepsis bundle clock starts at time of recognition, not time of admission. RRT documentation often establishes this "time zero" for quality metrics and CMS SEP-1 reporting. Late recognition = preventable harm in root-cause analyses.

Immediate (within minutes) at RRT bedside:

Imaging triggered by phenotype:

ECG patterns to recognize in seconds:

Diagnostic Workup — Advanced or Confirmatory Studies

— Suspected PE: CT pulmonary angiography is gold standard; V/Q scan if contrast contraindicated; bedside echo showing RV strain + McConnell sign supports empiric anticoagulation while awaiting imaging in unstable patient

— Suspected MI: serial troponins (0 and 1–3h with high-sensitivity assays), echo for wall motion, urgent cath if STEMI or refractory NSTEMI

— Suspected sepsis: procalcitonin (limited acute utility, better for de-escalation), source-specific imaging (CT abdomen for intra-abdominal sepsis, LP for meningitis, urinalysis/culture)

— Suspected stroke: non-contrast CT head within minutes, CTA head/neck, NIHSS, glucose, INR/coags before tPA

— Suspected tamponade: formal echo, prepare for pericardiocentesis

— Suspected anaphylaxis: clinical diagnosis; serum tryptase within 1–3 hours can confirm retrospectively

— Arterial line for continuous BP if on vasopressors

— Central venous access if multiple drips or need for CVP/ScvO₂ trends

— Continuous capnography for sedated or post-arrest patients

Board pearl: In a hemodynamically unstable patient with suspected massive PE, bedside echo showing RV dilation is sufficient to start thrombolytics — do not delay for CT-PA if the patient is crashing.

Key distinction: Procalcitonin should not be used to decide whether to start antibiotics in a deteriorating ward patient with suspected sepsis. It is used to stop antibiotics later. Empirical broad-spectrum coverage within 1 hour remains standard.

Once stabilized, focused confirmatory testing is directed by working diagnosis:

Advanced monitoring after RRT stabilization:

Documentation of advanced workup belongs in the RRT note and the receiving unit handoff, using a structured framework (SBAR or I-PASS) — directly testable as a systems-based practice item.

Risk Stratification and Activation-Criteria Logic

— Single-parameter triggers (any one abnormal vital → call)

— Aggregate scores (NEWS2, MEWS — composite)

— Subjective triggers (staff or family concern)

— HR <40 or >130

— RR <8 or >28

— SBP <90 (or drop >40 from baseline)

— SpO₂ <90% despite supplemental O₂

— Acute change in mental status / new agitation

— New, repeated, or prolonged seizure

— Urine output <50 mL over 4 hours

— Failure to respond to treatment for an acute problem

— Staff or family "worry"

— 0–4: ward monitoring, increase frequency of vitals

— 5–6 (or any single parameter scoring 3): urgent review by clinician within 1 hour

— ≥7: emergency response, consider ICU

— Tier 1: bedside nurse + charge nurse review

— Tier 2: RRT (ICU nurse, RT, hospitalist)

— Tier 3: Code team (intensivist, anesthesia for airway)

Step 3 management: When unsure between RRT and Code Blue → check pulse and breathing first. Pulse absent or agonal respirations only → Code Blue + CPR. Pulse present but deteriorating → RRT. Never withhold CPR to "wait for the team."

Board pearl: Hospitals required by Joint Commission NPSG 16 must have a method for staff and family to directly request additional assistance when concerned about a patient's condition. Restricting activation to physicians only is a citation-level failure.

Standardized activation criteria ensure consistent, equitable RRT calls. Most US hospitals use a hybrid of:

Common single-parameter RRT criteria (high-yield):

NEWS2 scoring (0–20 scale):

Code Blue activation is reserved for unresponsive AND pulseless or apneic patients — start CPR immediately, defibrillator pads on, push epinephrine per ACLS.

Tiered response models are increasingly tested:

Pharmacotherapy — First-Line Agents at RRT and Code Events

— Septic/distributive shock: crystalloid 30 mL/kg bolus, then norepinephrine (first-line vasopressor, target MAP ≥65); add vasopressin 0.03 U/min as second agent; hydrocortisone 200 mg/day if refractory

— Anaphylaxis: epinephrine 0.3–0.5 mg IM in anterolateral thigh — first and most important drug; repeat q5–15 min; IV epi infusion if refractory; adjuncts (H1/H2 blockers, steroids) do not replace epi

— Cardiogenic shock: norepinephrine preferred over dopamine (lower arrhythmia rate); dobutamine added for inotropy if perfusion still poor despite adequate MAP

— Hypovolemic/hemorrhagic: balanced crystalloid + early blood products (1:1:1 RBC:FFP:platelets in massive transfusion); tranexamic acid within 3 hours of trauma

— Epinephrine 1 mg IV q3–5 min for all arrest rhythms

— Amiodarone 300 mg IV (then 150 mg) for refractory VF/pulseless VT after 3rd shock; lidocaine 1–1.5 mg/kg is alternative

— Atropine 1 mg IV q3–5 min (max 3 mg) for symptomatic bradycardia

— Calcium gluconate 1–2 g IV for hyperkalemia, hypocalcemia, CCB overdose

— Sodium bicarbonate only for TCA overdose, severe metabolic acidosis with hyperkalemia, or aspirin toxicity — not routine in arrest

— Naloxone 0.04–0.4 mg IV for opioid-induced respiratory depression (start low to avoid acute withdrawal)

— Flumazenil — generally avoided in chronic benzodiazepine users (seizure risk)

Board pearl: In anaphylaxis, the #1 cause of death is delayed epinephrine. Steroids and antihistamines treat symptoms, not the lethal mechanism. IM thigh > SC > IV bolus (IV bolus reserved for arrest).

CCS pearl: Order epinephrine before the airway team arrives. Sequential ordering (diphenhydramine → steroids → epi) loses points and harms patients.

Shock-state pharmacology (deployed at bedside RRT):

ACLS code medications (memorize):

Reversal agents to have at every RRT:

Procedures and Invasive Management at the Bedside

— Jaw thrust, suction, OPA/NPA

— Bag-valve-mask with 2-person technique, PEEP valve, 100% O₂

— Supraglottic airway (LMA, i-gel) — bridge device

— Endotracheal intubation — for failure to oxygenate/ventilate, airway protection (GCS ≤8), or anticipated clinical course (e.g., severe sepsis with respiratory fatigue)

— Surgical airway (cricothyrotomy) for "can't intubate, can't oxygenate"

— Two large-bore peripheral IVs (≥18G) are first-line — faster flow than central line for resuscitation

— Intraosseous (IO) access is appropriate within 90 seconds of failed peripheral attempts during arrest

— Central line (IJ, subclavian, femoral) for vasopressors >6 hours, multiple incompatible drips, or hemodynamic monitoring — ultrasound guidance standard of care

— Defibrillation (unsynchronized): VF, pulseless VT — 200J biphasic

— Synchronized cardioversion: unstable SVT, AF with RVR, stable VT with pulse — start 100–200J

— Transcutaneous pacing: symptomatic bradycardia refractory to atropine, bridge to transvenous pacing

— Needle decompression (2nd ICS midclavicular or 4th–5th ICS midaxillary) for tension pneumothorax

— Pericardiocentesis for tamponade with shock

— Thoracostomy tube for hemothorax/pneumothorax

Step 3 management: For shock requiring vasopressors, start norepinephrine through a large-bore PIV while obtaining central access — do not delay pressor initiation. Recent data support safety of short-term peripheral vasopressors.

Board pearl: Survival from in-hospital VF arrest drops ~7–10% per minute without defibrillation. Time to first shock <2 minutes is the most validated process measure for code team performance.

Airway interventions (in order of escalation):

Vascular access during deterioration:

Defibrillation and cardioversion:

Other emergent procedures:

Special Populations — Elderly and Renal/Hepatic Impairment

— Baseline vitals may obscure deterioration (chronic HR 55 from beta-blocker, baseline SBP 100, blunted febrile response)

— Delirium is often the first sign of sepsis, MI, PE, or stroke — new confusion warrants full workup, not "sundowning" dismissal

— Polypharmacy (Beers list): benzodiazepines, anticholinergics, opioids predispose to respiratory depression and falls triggering RRTs

— Lower physiologic reserve — escalate earlier

— Adjust contrast-based imaging (CT-PA) — weigh benefit; PE diagnosis usually outweighs AKI risk

— Avoid NSAIDs, nephrotoxic antibiotics where possible (aminoglycosides, vancomycin requires level-based dosing)

— LMWH renally cleared — use unfractionated heparin if CrCl <30 in acute VTE during RRT

— Hyperkalemia threshold lower in dialysis patients — dialyze early after temporizing measures (calcium, insulin/glucose, β-agonist)

— Coagulopathy (elevated INR) ≠ anticoagulated — TEG/ROTEM more useful than INR alone

— Avoid acetaminophen >2 g/day; hepatically metabolized sedatives (midazolam) accumulate — use propofol or short-acting agents

— Hepatic encephalopathy can masquerade as primary neurologic deterioration — check ammonia, lactulose

— Variceal bleeding: octreotide, ceftriaxone prophylaxis, urgent endoscopy

Board pearl: A fall in an elderly patient on warfarin triggers head CT even without symptoms and even with normal initial exam — delayed intracranial hemorrhage is classic. Many hospitals build this into post-fall RRT protocols.

Key distinction: Vancomycin trough levels do not need to be drawn before the first dose in sepsis — full weight-based loading dose (25–30 mg/kg) is given immediately; monitoring begins with steady state. Delaying vancomycin "for levels" is a wrong answer.

Elderly inpatients (≥65) present unique RRT challenges:

Renal impairment considerations:

Hepatic impairment considerations:

Special Populations — Pregnancy, Pediatrics, and Other Subgroups

— Left lateral tilt during resuscitation to relieve aortocaval compression (manual uterine displacement during CPR)

— Perimortem cesarean delivery within 4–5 minutes of arrest if fundus above umbilicus and no ROSC — improves maternal and fetal survival

— Physiologic baseline: HR ~85–100, BP lower, mild respiratory alkalosis — "normal" lab values shift

— Differential expanded: amniotic fluid embolism, peripartum cardiomyopathy, eclampsia, HELLP, postpartum hemorrhage

— Imaging: shield abdomen, but do not withhold indicated CT for life-threatening conditions

— Hypotension is a late finding — tachycardia, capillary refill >3 sec, mottling are earlier

— Bradycardia in a child = hypoxia until proven otherwise → oxygenate and ventilate first

— PEWS (Pediatric Early Warning Score) replaces NEWS2

— Weight-based dosing critical — Broselow tape, code cards at bedside

— OSA/OHS predisposes to opioid-induced respiratory depression — continuous capnography preferred over pulse ox alone

— Difficult airway, difficult vascular access — call anesthesia early

— Atypical infections, blunted inflammatory response — fever may be absent

— Neutropenic fever: empiric cefepime or pip-tazo within 1 hour — full RRT-level urgency

Step 3 management: Maternal resuscitation always takes priority — what's good for mom is good for baby. Do not delay defibrillation, intubation, or thrombolytics out of fetal concern in life-threatening maternal arrest.

Board pearl: Perimortem cesarean is a maternal resuscitative procedure as much as a fetal rescue — emptying the uterus improves venous return and cardiac output, often enabling ROSC.

Pregnant patients (≥20 weeks):

Pediatric inpatients:

Obese patients:

Immunocompromised (transplant, chemotherapy, HIV with low CD4):

Complications and Adverse Outcomes of RRT/Code Events

— Post-cardiac arrest syndrome: anoxic brain injury, myocardial dysfunction, systemic ischemia-reperfusion, persistent inciting pathology

— Targeted Temperature Management (TTM): 32–36°C for 24 hours in comatose post-arrest patients improves neurologic outcomes

— Rib fractures, pneumothorax, hepatic laceration from CPR (acceptable trade-off)

— Aspiration during intubation, esophageal intubation, dental trauma

— Line-associated complications: pneumothorax (subclavian/IJ), arterial puncture, catheter-related bloodstream infection

— Medication errors during high-acuity events (push-dose epi miscalculation, look-alike vials)

— "RRT fatigue" — too frequent activations dilute response; too restrictive criteria cause failure to rescue

— Disrupted care of other ward patients when staff diverted

— Documentation gaps during chaos → handoff errors, malpractice exposure

— In-hospital cardiac arrest survival to discharge ~25%; favorable neurologic outcome ~20%

— RRT implementation associated with reduced non-ICU arrests (~30%) but mortality benefit modest unless paired with ICU capacity and culture change

— Delayed activation (most common)

— Failure to escalate code status discussion before deterioration

— Inadequate handoff to receiving ICU team

Board pearl: Post-arrest comatose patients should receive TTM, head CT, EKG, urgent coronary angiography if STEMI or high suspicion of cardiac etiology, and delayed neuroprognostication ≥72 hours after rewarming. Early withdrawal of life support is a known cause of self-fulfilling poor outcomes.

Key distinction: Routine therapeutic hypothermia at 33°C is no longer superior to normothermia at 36°C in most trials — current guidelines support avoiding fever and individualizing target temperature.

Patient-level complications:

System-level harms:

Outcomes data:

Failure modes (commonly tested in safety stems):

When to Escalate Care — ICU, Consult, and Transfer Triage

— Need for vasopressors or inotropes

— Mechanical ventilation (invasive or sustained NIV with high settings)

— Continuous infusions requiring close titration (insulin drip for DKA, nicardipine for hypertensive emergency, heparin for massive PE)

— Frequent (>q1h) neurologic checks

— Post-cardiac arrest care, post-thrombolytic monitoring

— Severe electrolyte derangement requiring frequent labs (K+ >6.5, Na+ <120 with symptoms)

— Lactate >4 or rising despite resuscitation

— Stable on low-dose vasopressors with arterial line

— High-flow nasal cannula without escalating needs

— Frequent monitoring not requiring continuous titration

— Cardiology: STEMI, refractory arrhythmia, cardiogenic shock

— Pulmonary/CC: respiratory failure, sepsis

— Neurology: stroke, status epilepticus, post-arrest neuroprognostication

— Surgery: acute abdomen, hemorrhage source control

— Anesthesia: difficult airway

— Use structured handoff (I-PASS, SBAR)

— Closed-loop communication — receiver repeats back

— Bedside handoff in unstable patients, with both teams present

— Document medication reconciliation, code status, pending studies

Step 3 management: A patient remaining on the ward after RRT requires explicit re-evaluation plan — vitals q1–2h x 4–6 hours, defined parameters for re-activation, and physician review within the next hour. "Continue current care" is insufficient.

CCS pearl: On CCS, after stabilizing an RRT patient, change location to ICU before ordering vasopressor titration, mechanical ventilation, or continuous EEG. Location changes are themselves graded actions.

ICU transfer criteria after RRT:

Intermediate care (step-down) appropriate for:

Specialty consultation triggers during/after RRT:

Transfer-of-care safety:

Key Differentials — Same-Category (Acute Deterioration) Causes

— Pulmonary embolism (post-op day 3–7 classic)

— Pneumonia (hospital-acquired vs aspiration)

— Pulmonary edema (cardiogenic, volume overload, neurogenic)

— Pneumothorax (post-line placement, COPD, mechanical ventilation)

— Mucus plugging, atelectasis

— ARDS — bilateral infiltrates within 1 week of insult, P/F <300

— Sepsis (most common in hospitalized patients)

— Hemorrhage (GI, retroperitoneal, surgical site)

— Anaphylaxis (medication, contrast, transfusion)

— MI / cardiogenic

— PE (obstructive)

— Tamponade (post-cardiac surgery, malignancy, uremia)

— Adrenal crisis (chronic steroid users with abrupt taper or stress)

— Hypoglycemia

— Hypoxemia, hypercapnia

— Sepsis-associated encephalopathy

— Stroke (ischemic, hemorrhagic)

— Medication: opioids, benzodiazepines, anticholinergics

— Electrolyte: hyponatremia, hypercalcemia

— Hepatic, uremic encephalopathy

— Nonconvulsive status epilepticus — easy to miss

— ACS, PE, aortic dissection, tamponade, pneumothorax, esophageal rupture ("the deadly six")

Board pearl: New-onset atrial fibrillation in an inpatient is rarely "primary" — search for the trigger: sepsis, PE, MI, pulmonary process, electrolyte derangement, post-op state, alcohol withdrawal. Rate control alone without treating the driver is incomplete.

Key distinction: In a deteriorating post-op patient with hypoxemia and clear lungs on CXR, PE jumps to the top of the differential — atelectasis/pneumonia typically show CXR findings.

Within "acute hospital deterioration," common syndromic differentials by phenotype:

Acute hypoxemia / respiratory failure:

Acute hypotension / shock:

Acute altered mental status:

Acute chest pain:

Key Differentials — Other-Category Causes of False or Atypical Triggers

— Drug effects: opioid-induced sedation (reverse with naloxone, do not intubate first), benzodiazepine effect, anticholinergic delirium

— Equipment artifact: poor pulse ox waveform (cold extremity, nail polish, motion), inaccurate auto-BP cuff (wrong size, AF), ECG lead misplacement mimicking ischemia

— Pain/anxiety: tachycardia and hypertension from undertreated pain or panic — treat the cause, don't reflexively beta-block

— Withdrawal syndromes: alcohol (tremor, tachycardia, hypertension, seizures, DTs in 2–4 days), opioid (less life-threatening but uncomfortable), benzodiazepine (seizure risk)

— Serotonin syndrome / NMS: hyperthermia, autonomic instability, neuromuscular abnormalities — recent medication change is key

— Thyroid storm, adrenal crisis, pheochromocytoma — endocrine emergencies often missed

— Transfusion reactions: TRALI (acute lung injury within 6 hours), TACO (volume overload), acute hemolytic (ABO incompatibility), febrile non-hemolytic, anaphylactic (IgA deficiency)

— Vascular, Infectious, Neoplastic, Drug, Iatrogenic, Congenital, Autoimmune, Trauma, Endocrine/metabolic

— Check the IV — is the drip actually infusing?

— Check the urinary catheter — retention can mask in/outs

— Check the surgical site, drains, dressings — bleeding hides under blankets

— Check medication administration record for new agents in last 24h

Step 3 management: When a patient on a PCA pump becomes somnolent with RR 6, the answer is naloxone + stop the PCA, not intubation. Reversible causes first, escalating invasiveness second.

Board pearl: A previously stable patient who becomes tachycardic and hypotensive 15 minutes into a blood transfusion has an acute hemolytic transfusion reaction until proven otherwise — stop transfusion, send tubing/bag to blood bank, supportive care, monitor for DIC and AKI.

Conditions that mimic deterioration but require different management:

"VINDICATE" / broad framework still useful when phenotype is unclear:

Don't forget the basics during RRT:

Secondary Prevention, Post-Event Orders, and Long-Term Planning

— RRT note with time of activation, trigger, interventions, response

— Updated problem list and active diagnoses

— Revised monitoring parameters (vitals frequency, telemetry, continuous SpO₂)

— Explicit re-activation thresholds

— Goals-of-care reassessment within 24 hours, ideally during/after RRT

— Medication reconciliation — was a culprit medication identified?

— Family communication and documentation thereof

— Continue post-arrest care bundle (TTM, sedation, hemodynamic targets MAP ≥65, normoxia/normocapnia, glucose 140–180)

— Coronary angiography if cardiac etiology suspected

— Neuroprognostication delayed ≥72h after rewarming, using multimodal approach (exam, EEG, SSEPs, NSE, imaging)

— Defibrillator consideration after recovery for survivors of VF/VT without reversible cause (secondary prevention ICD)

— Post-MI: dual antiplatelet, beta-blocker, high-intensity statin, ACEi/ARB if EF reduced

— Post-PE: anticoagulation x3 months minimum (longer if unprovoked or persistent risk)

— Post-sepsis: vaccinations (pneumococcal, influenza), functional reassessment, post-sepsis syndrome counseling (cognitive, physical, psychiatric sequelae)

— Anaphylaxis: epinephrine auto-injector x2, allergy referral, MedicAlert, written action plan

Board pearl: Post-sepsis syndrome affects up to 50% of survivors and includes new cognitive impairment, PTSD, depression, and physical deconditioning. Outpatient follow-up within 1–2 weeks of discharge is recommended.

Step 3 management: A patient who survived an anaphylactic event leaves the hospital with two epinephrine auto-injectors, demonstrated technique, written action plan, and allergy/immunology referral — all four are expected answers.

Post-RRT documentation and orders bundle:

For survivors of in-hospital cardiac arrest:

Discharge medications (when applicable, depending on cause):

Code status revisited at every transition — admission, transfer, RRT, discharge.

Follow-Up, Monitoring, and Rehab/Counseling After Critical Events

— Vital signs q1h x 4 hours, then q2h x 4 hours, then q4h if stable

— Continuous pulse oximetry and telemetry until off vasopressors and weaning oxygen

— Daily labs trending lactate, renal function, electrolytes

— Repeat ECG and troponins if event was cardiac

— Daily delirium screening (CAM-ICU) — at-risk patients need non-pharm prevention bundle

— Post-MI: cardiology in 1–2 weeks, cardiac rehab referral, PCP within 1 week, lipid recheck at 4–12 weeks

— Post-PE: hematology or anticoagulation clinic in 1–2 weeks, repeat imaging only if persistent symptoms, evaluation for thrombophilia in selected cases

— Post-sepsis: PCP within 1 week, screen for cognitive/functional decline, medication reconciliation

— Post-cardiac arrest survivors: ICD evaluation, neurology if anoxic injury, cardiac rehab, driving restrictions (typically 6 months for VT/VF survivors, varies by state)

— Early mobilization in ICU reduces ICU-acquired weakness and delirium

— PT/OT consultation before discharge

— Cardiac rehab Class I indication after MI, CABG, stable angina, HF — improves mortality

— Pulmonary rehab for COPD exacerbation survivors

— Symptom return precautions (red flags requiring ED return)

— Medication side effects and adherence

— Smoking cessation, alcohol counseling, diet, exercise

— Vaccinations brought up to date

Board pearl: Cardiac rehab referral at discharge after MI is a CMS quality measure and a guideline Class I recommendation — yet under-prescribed. Step 3 stems will test whether you order it.

Step 3 management: "Follow up with PCP in 1–2 weeks" beats "follow up as needed" on nearly every transitions-of-care question — the medication reconciliation visit within 7–14 days is the most evidence-supported intervention to reduce 30-day readmissions.

In-hospital monitoring cadence after RRT (typical):

Post-discharge follow-up cadence (Step 3 favorite):

Rehab considerations:

Counseling content:

Ethical, Legal, and Patient Safety Considerations

— DNR/DNI orders apply only to cardiopulmonary arrest — they do not preclude RRT activation, ICU transfer, antibiotics, or non-invasive ventilation unless explicitly specified

— Code status must be re-addressed at every transition; ambiguous orders ("limited code") are dangerous and discouraged — use clear, granular orders or POLST/MOLST forms

— Surrogate decision-making hierarchy varies by state — know spouse → adult child → parent → sibling as default

— Emergency exception: implied consent for life-saving intervention in incapacitated patient without surrogate available

— A patient who previously declined intubation but is now obtunded — honor prior documented wishes (advance directive, POLST) over physician inclination

— Disclosure of adverse events to patient/family is required by Joint Commission and CMS — includes RRT events caused by medication error, missed deterioration, or procedural complication

— "Apology laws" in most states protect expressions of empathy from being used as malpractice admission

— Sentinel events (unexpected death, permanent harm) require root cause analysis within 45 days

— Handoff errors cause ~80% of serious medical errors (Joint Commission data)

— Use I-PASS structured handoff (Illness severity, Patient summary, Action list, Situation awareness, Synthesis)

— Family-witnessed resuscitation increasingly supported; designate a staff liaison

— Stopping CPR: based on prolonged asystole despite ACLS, end-tidal CO₂ <10 after 20 min, known terminal illness, or surrogate request consistent with patient wishes

Board pearl: A patient with valid DNR who develops respiratory failure from a reversible cause (e.g., pulmonary edema, anaphylaxis) can still receive BiPAP, antibiotics, vasopressors — DNR ≠ "do not treat." Misinterpreting DNR as comfort-only is a tested patient-safety error.

Step 3 management: Always document the conversation, not just the decision — who was present, what was discussed, what was decided, and the patient's capacity at time of decision.

Code status and goals of care:

Informed consent edge cases:

Mandatory reporting and disclosure:

Transition-of-care risks:

CPR ethics:

High-Yield Associations and Rapid-Fire Clinical Facts

— RR >28 + clear CXR + post-op → PE

— RR <8 + pinpoint pupils → opioid overdose → naloxone

— SBP <90 + new urticaria + recent IV med → anaphylaxis → IM epi

— HR <40 + syncope on ward → symptomatic bradycardia → atropine, pacing

— New AMS + glucose <40 → hypoglycemia → D50 IV

— Post-line placement + sudden hypoxia + unilateral absent breath sounds → pneumothorax

— Post-blood transfusion + fever + back pain + dark urine → acute hemolytic reaction

— Sepsis bundle: antibiotics within 1 hour

— Stroke tPA window: 4.5 hours (thrombectomy up to 24h in select)

— STEMI PCI: door-to-balloon <90 minutes

— Anaphylaxis epi: immediate — every minute matters

— VF defibrillation: <2 minutes in hospitalized patients

— Perimortem C-section: within 4–5 minutes of maternal arrest

— Vancomycin → red man syndrome (rate-related, not allergic)

— Iodinated contrast → anaphylactoid + AKI

— Heparin → HIT (platelet drop >50% on day 5–10)

— Amiodarone → hypotension, bradycardia (push slowly)

— Propofol → hypotension, propofol infusion syndrome with prolonged use

— RR ≤8 or ≥25, SpO₂ ≤91%, SBP ≤90 or ≥220, HR ≤40 or ≥131, new confusion, temp ≤35°C

Board pearl: Lactate >4 mmol/L in suspected infection = septic shock physiology even with normal BP ("cryptic shock") — full bundle, aggressive resuscitation, ICU disposition.

Key distinction: Stridor = upper airway (anaphylaxis, angioedema, foreign body) → secure airway early. Wheezing = lower airway (asthma, anaphylaxis, COPD) → bronchodilators.

Trigger vital → classic etiology:

Time-critical thresholds:

Drug → toxic effect during RRT:

NEWS2 single-parameter score 3 (red flags):

Board Question Stem Patterns

— 72-year-old POD#2 from colectomy. Vitals over 6 hours: RR 18→22→26→30, SpO₂ 96%→93%→89%, HR 88→105→118. Nurse calls intern who orders "increase O₂ and recheck in 1 hour." Patient arrests.

— Answer focus: failure to activate RRT; correct action was to call RRT and initiate workup for PE/sepsis.

— Patient on PCA morphine with OSA becomes somnolent, RR 6, SpO₂ 86%.

— Answer: naloxone, stop PCA, bag-mask ventilate — not intubation as first step.

— DNR patient develops sepsis with hypotension.

— Answer: full sepsis bundle (fluids, antibiotics, vasopressors) — DNR does not preclude these.

— Wife of inpatient insists "something is wrong" despite normal vitals.

— Answer: activate RRT or perform thorough bedside evaluation; family concern is a validated trigger.

— 30 minutes into vancomycin, patient develops diffuse rash, wheezing, BP 80/40.

— Answer: stop infusion, IM epinephrine 0.3–0.5 mg in thigh — not diphenhydramine first.

— ROSC after VF arrest, comatose, no obvious cause.

— Answer: TTM (32–36°C), urgent coronary angiography, ICU admission, delay neuroprognostication ≥72h.

— Hospital shows rising rate of ward arrests.

— Answer: implement RRT with mandatory activation criteria, family activation pathway, and audit feedback.

Step 3 management: When in doubt between "observe" and "act," act. Board answers reward the option that demonstrates urgency, structured assessment, and clear communication. "Reassure and reassess" is rarely the right answer in an RRT vignette.

Board pearl: Watch for respiratory rate trends in the stem — they are the breadcrumb to the correct diagnosis and to the "should have activated RRT" answer.

Pattern 1 — The "missed deterioration" stem:

Pattern 2 — The drug culprit stem:

Pattern 3 — The DNR misinterpretation stem:

Pattern 4 — The family activation stem:

Pattern 5 — The anaphylaxis stem:

Pattern 6 — The post-arrest stem:

Pattern 7 — The system improvement stem:

One-Line Recap

Activate the rapid response team early — before arrest — for any patient with an abnormal vital sign trend, acute mental status change, or staff/family concern; reserve Code Blue for the pulseless or apneic patient, and remember that timely recognition and structured escalation prevent the majority of in-hospital cardiac arrests.

Board pearl: The single most predictive — and most commonly missed — vital sign for impending in-hospital arrest is respiratory rate. Trust the trend, escalate early, and never let a DNR order be misread as a do-not-rescue order.

Activation criteria recap: HR <40 or >130, RR <8 or >28, SBP <90 (or drop >40), SpO₂ <90% on O₂, new altered mental status, seizure, oliguria <50 mL/4h, failure to respond to therapy, and the always-valid "staff or family worry."

NEWS2 ≥5 → urgent review; ≥7 → emergency response. Single parameter scoring 3 also triggers escalation.

Code Blue ≠ RRT. Pulseless/apneic = Code + CPR + defibrillation within 2 minutes; deteriorating but conversant = RRT + structured ABCDE workup.

DNR ≠ do not treat. RRT, antibiotics, NIV, fluids, and vasopressors remain on the table unless explicitly limited by the patient's documented wishes.

Time-critical actions: antibiotics in sepsis <1h, epinephrine in anaphylaxis immediately IM, defibrillation in VF <2 min, perimortem C-section in maternal arrest <5 min, door-to-balloon STEMI <90 min, tPA in stroke ≤4.5h.

Handoffs matter: use I-PASS or SBAR with closed-loop communication; transition errors cause the majority of preventable serious harm.

Post-event bundle: updated monitoring parameters, re-activation thresholds, goals-of-care reassessment, medication reconciliation, family communication, and outpatient follow-up within 1–2 weeks.