Section 1
The 60-Second Resuscitation Card (First 5 Minutes)
Non-Invasive Positive-Pressure Ventilation (NIPPV: CPAP/BiPAP) and High-Flow Nasal Cannula (HFNC) unload the respiratory muscles, recruit collapsed alveoli, and alter intrathoracic ventricular preload and afterload within seconds [1,2]. Success depends on matching the exact biophysical modality to the underlying pathophysiological phenotype while rigorously monitoring for occult failure and Patient Self-Inflicted Lung Injury (P-SILI) [1,2,3].
0:00
Immediate Bedside Action & Exact Settings / Dose
Screen Absolute Contraindications & Classify Phenotype: Exclude respiratory arrest, inability to protect airway (GCS < 8 unless pure hypercapnic CO₂ narcosis), copious vomiting/hematemesis, facial trauma/burns, or untreated pneumothorax [1]. Classify into (A) Hypercapnic Pump Failure (COPD), (B) Cardiogenic Pulmonary Edema / SCAPE, or (C) De Novo Hypoxemic / Pneumonia Shunt [1,2].
Equipment / Setup Specification
Upright positioning (45°–90°); continuous waveform ETCO₂ nasal/mask adapter, 5-lead ECG, NIBP q3min, arterial/venous blood gas drawn.
Physiological & Mechanical Objective
Upright posture drops the abdominal contents off the diaphragm, immediately expanding baseline Functional Residual Capacity (FRC) by 300–500 mL [1].
0:30
Immediate Bedside Action & Exact Settings / Dose
Phenotype A — Acute COPD Hypercapnic Acidosis (pH 7.20–7.35, PaCO₂ > 45 mmHg): Initiate BiPAP (S/T Mode) at IPAP 12–14 cmH₂O / EPAP 4–5 cmH₂O (Driving Pressure / Pressure Support ΔP = 8–10 cmH₂O), backup rate 12–14 breaths/min, inspiratory trigger high sensitivity, target SpO₂ 88%–92% [1].
Equipment / Setup Specification
Tight-fitting full-face or oronasal mask (non-vented circuit with dual-limb ICU ventilator or single-limb BiPAP with whisper-swivel exhalation port); inline vibrating-mesh nebulizer placed distal to exhalation port.
Physiological & Mechanical Objective
External EPAP (4–5 cmH₂O) stenting the small airways counterbalances intrinsic Auto-PEEP (PEEPᵢ), reducing the inspiratory threshold work required to trigger a breath, while ΔP (IPAP − EPAP) augments tidal volume (VT) to blow off PaCO₂ [1].
1:30
Immediate Bedside Action & Exact Settings / Dose
Phenotype B — SCAPE / Acute Cardiogenic Pulmonary Edema: Initiate CPAP at 10 cmH₂O (titrate to 12–15 cmH₂O) OR BiPAP at IPAP 15–18 cmH₂O / EPAP 8–10 cmH₂O at FiO₂ 1.0 [1,4]. Simultaneously start High-Dose IV Nitroglycerin: 100–200 mcg/min infusion (after 400–800 mcg sublingual or 1–2 mg IV bolus if SBP ≥ 160 mmHg) [4,5].
Equipment / Setup Specification
Full-face mask secured with 4-point headgear; keep total peak airway pressure < 20–22 cmH₂O to avoid opening the lower esophageal sphincter (LES opening pressure ≈ 20–25 cmH₂O).
Physiological & Mechanical Objective
Positive intrathoracic pressure (+10 cmH₂O) reduces both Right Ventricular preload (↓ venous return) and Left Ventricular Transmural Afterload (Pₜₘ = P(LV) − Pₚₗ) while driving alveolar edema fluid back into the interstitium [1,4].
3:00
Immediate Bedside Action & Exact Settings / Dose
Phenotype C — De Novo Hypoxemic Respiratory Failure (Pneumonia / Early ARDS): Initiate HFNC at Flow 50–60 L/min (heated to 37°C, 100% relative humidity) and FiO₂ 1.0 (titrate to SpO₂ 92%–96%) [2,3]. (If Helmet NIPPV is available, set PEEP 10–12 cmH₂O and Pressure Support 8–10 cmH₂O) [6].
Equipment / Setup Specification
Appropriately sized wide-bore HFNC nasal prongs (occluding ≈ 50% of nares diameter so expiratory gas can vent around prongs).
Physiological & Mechanical Objective
60 L/min gas flow matches peak inspiratory demand, washes out nasopharyngeal anatomical dead space (≈ 150 mL), and prevents massive tidal volumes (VT > 9.5 mL/kg) that cause P-SILI on mask BiPAP [2,3].
5:00
Immediate Bedside Action & Exact Settings / Dose
Dynamic Titration & Early Failure Screen (ROX & HACOR Scores): If COPD PaCO₂ remains elevated at 15 min, step IPAP up by 2–3 cmH₂O every 10 min (up to 20–22 cmH₂O) to increase ΔP [1].
Calculate ROX Index [(SpO₂/FiO₂)/RR] on HFNC and HACOR Score on NIPPV: prepare for immediate Video Laryngoscopy RSI if ROX < 3.85 or HACOR > 5 at 1–2 hours [7,8].
Calculate ROX Index [(SpO₂/FiO₂)/RR] on HFNC and HACOR Score on NIPPV: prepare for immediate Video Laryngoscopy RSI if ROX < 3.85 or HACOR > 5 at 1–2 hours [7,8].
Equipment / Setup Specification
Bedside ventilator graphics: inspect Flow-Time curve for air leaks (> 25 L/min) and premature/delayed cycling; keep Ketamine (0.5 mg/kg IV) or Dexmedetomidine ready for mask intolerance.
Physiological & Mechanical Objective
Prevents the Delayed Intubation Mortality Spike seen when failing NIPPV or HFNC is dragged past 2–6 hours until respiratory arrest occurs [2,7,8].
| Time | Immediate Bedside Action & Exact Settings / Dose | Equipment / Setup Specification | Physiological & Mechanical Objective |
|---|---|---|---|
| 0:00 | Screen Absolute Contraindications & Classify Phenotype: Exclude respiratory arrest, inability to protect airway (GCS < 8 unless pure hypercapnic CO₂ narcosis), copious vomiting/hematemesis, facial trauma/burns, or untreated pneumothorax [1]. Classify into (A) Hypercapnic Pump Failure (COPD), (B) Cardiogenic Pulmonary Edema / SCAPE, or (C) De Novo Hypoxemic / Pneumonia Shunt [1,2]. | Upright positioning (45°–90°); continuous waveform ETCO₂ nasal/mask adapter, 5-lead ECG, NIBP q3min, arterial/venous blood gas drawn. | Upright posture drops the abdominal contents off the diaphragm, immediately expanding baseline Functional Residual Capacity (FRC) by 300–500 mL [1]. |
| 0:30 | Phenotype A — Acute COPD Hypercapnic Acidosis (pH 7.20–7.35, PaCO₂ > 45 mmHg): Initiate BiPAP (S/T Mode) at IPAP 12–14 cmH₂O / EPAP 4–5 cmH₂O (Driving Pressure / Pressure Support ΔP = 8–10 cmH₂O), backup rate 12–14 breaths/min, inspiratory trigger high sensitivity, target SpO₂ 88%–92% [1]. | Tight-fitting full-face or oronasal mask (non-vented circuit with dual-limb ICU ventilator or single-limb BiPAP with whisper-swivel exhalation port); inline vibrating-mesh nebulizer placed distal to exhalation port. | External EPAP (4–5 cmH₂O) stenting the small airways counterbalances intrinsic Auto-PEEP (PEEPᵢ), reducing the inspiratory threshold work required to trigger a breath, while ΔP (IPAP − EPAP) augments tidal volume (VT) to blow off PaCO₂ [1]. |
| 1:30 | Phenotype B — SCAPE / Acute Cardiogenic Pulmonary Edema: Initiate CPAP at 10 cmH₂O (titrate to 12–15 cmH₂O) OR BiPAP at IPAP 15–18 cmH₂O / EPAP 8–10 cmH₂O at FiO₂ 1.0 [1,4]. Simultaneously start High-Dose IV Nitroglycerin: 100–200 mcg/min infusion (after 400–800 mcg sublingual or 1–2 mg IV bolus if SBP ≥ 160 mmHg) [4,5]. | Full-face mask secured with 4-point headgear; keep total peak airway pressure < 20–22 cmH₂O to avoid opening the lower esophageal sphincter (LES opening pressure ≈ 20–25 cmH₂O). | Positive intrathoracic pressure (+10 cmH₂O) reduces both Right Ventricular preload (↓ venous return) and Left Ventricular Transmural Afterload (Pₜₘ = P(LV) − Pₚₗ) while driving alveolar edema fluid back into the interstitium [1,4]. |
| 3:00 | Phenotype C — De Novo Hypoxemic Respiratory Failure (Pneumonia / Early ARDS): Initiate HFNC at Flow 50–60 L/min (heated to 37°C, 100% relative humidity) and FiO₂ 1.0 (titrate to SpO₂ 92%–96%) [2,3]. (If Helmet NIPPV is available, set PEEP 10–12 cmH₂O and Pressure Support 8–10 cmH₂O) [6]. | Appropriately sized wide-bore HFNC nasal prongs (occluding ≈ 50% of nares diameter so expiratory gas can vent around prongs). | 60 L/min gas flow matches peak inspiratory demand, washes out nasopharyngeal anatomical dead space (≈ 150 mL), and prevents massive tidal volumes (VT > 9.5 mL/kg) that cause P-SILI on mask BiPAP [2,3]. |
| 5:00 | Dynamic Titration & Early Failure Screen (ROX & HACOR Scores): If COPD PaCO₂ remains elevated at 15 min, step IPAP up by 2–3 cmH₂O every 10 min (up to 20–22 cmH₂O) to increase ΔP [1]. Calculate ROX Index [(SpO₂/FiO₂)/RR] on HFNC and HACOR Score on NIPPV: prepare for immediate Video Laryngoscopy RSI if ROX < 3.85 or HACOR > 5 at 1–2 hours [7,8]. | Bedside ventilator graphics: inspect Flow-Time curve for air leaks (> 25 L/min) and premature/delayed cycling; keep Ketamine (0.5 mg/kg IV) or Dexmedetomidine ready for mask intolerance. | Prevents the Delayed Intubation Mortality Spike seen when failing NIPPV or HFNC is dragged past 2–6 hours until respiratory arrest occurs [2,7,8]. |
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