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Table 1 Classification of airway in ICU
| Anatomically difficult airway | Physiologically difficult airway | Anatomically as well as physiologically difficult airway |
|---|---|---|
| A. Difficult bag mask ventilation | 1. Neurophysiologic derangement (raised intracranial pressure) | • A + (any of physiological derangement 1....8) |
| B. Difficult supraglottic device placement | 2. Cardiovascular derangement (derangements of preload, afterload, contractility or rhythm) | • B + (any of physiological derangement 1....8) |
| C. Difficult intubation | 3. Respiratory derangement (hypoxemia and hypercarbia) | • C + (any of physiological derangement 1....8) |
| D. Difficult surgical airway | 4. Hepatic derangement (raised intracranial pressure and coagulopathy) | • D + (any of physiological derangement 1....8) |
| 5. Renal derangement (encephalopathy, pulmonary oedema, hyperkalemia and metabolic acidosis) | ||
| 6. Gut derangement (raised intra-abdominal pressure, abdominal compartment syndrome) | ||
| 7. Severe sepsis (lactic acidosis, distributive shock multiple organ dysfunction) |
