A 38-year-old female patient with severe preeclampsia is admitted for emergency cesarean section. During rapid sequence induction, after administration of propofol and succinylcholine, the anesthesiologist notes that bag-mask ventilation is impossible—no chest rise is observed despite multiple attempts with different mask sizes and head positioning. Oxygen saturation drops from 98% to 78% within 60 seconds. What is the most appropriate immediate action?

Explanation

## The "Cannot Intubate, Cannot Oxygenate" Emergency **Key Point:** When bag-mask ventilation fails AND intubation is anticipated to be difficult, the patient enters the "cannot intubate, cannot oxygenate" (CICO) scenario—a true airway emergency requiring immediate surgical airway access. **High-Yield:** Cricothyrotomy is the definitive emergency airway in CICO situations. Delay in performing it increases hypoxic brain injury risk exponentially. ### Criteria for Emergency Cricothyrotomy 1. **Cannot oxygenate** by bag-mask ventilation (no chest rise, SpO~2~ dropping) 2. **Cannot intubate** anticipated (difficult airway predicted or attempted intubation failed) 3. **Time-critical** situation (SpO~2~ <80%, declining rapidly) **Clinical Pearl:** The "CICO" triad is absolute indication for cricothyrotomy: - Failed bag-mask ventilation (no chest rise) - Anticipated difficult intubation (Mallampati III/IV, limited neck mobility, etc.) - Rapid desaturation (SpO~2~ <80% within 60 seconds) In this case: - ✓ Failed bag-mask ventilation (no chest rise) - ✓ Preeclampsia + emergency setting = anticipated difficulty - ✓ SpO~2~ 78% in 60 seconds = critical desaturation ### Why Other Options Fail | Option | Why Wrong | |--------|----------| | Video laryngoscope | While useful for difficult intubation, it requires continued oxygenation. With SpO~2~ 78% and no bag-mask ventilation, there is insufficient time for intubation attempts. CICO mandates surgical airway. | | Second succinylcholine | Succinylcholine does not improve bag-mask ventilation. Redosing wastes critical time and worsens hypoxia. The problem is mask seal/airway obstruction, not inadequate paralysis. | | Trendelenburg + straight blade | Positional changes and alternative laryngoscopes do not address the fundamental problem: inability to oxygenate. Continued intubation attempts in CICO lead to hypoxic cardiac arrest. | **Warning:** Do NOT confuse "difficult intubation" with "CICO." Difficult intubation may be managed with bougie, video laryngoscope, or awake fiberoptic technique. CICO (failed oxygenation + failed intubation anticipated) = immediate cricothyrotomy. **Mnemonic:** **CICO** = **C**annot **I**ntubate, **C**annot **O**xygenate → **Cricothyrotomy NOW** [cite:Difficult Airway Society Guidelines 2015; Anesthesia 2015 70(1):11-27]