In the Difficult Airway Society algorithm, if Plan A (oral intubation with direct laryngoscopy) fails after 3 attempts, which of the following represents the PRIMARY recommendation for Plan B?

Explanation

## DAS Algorithm — Plan B Strategy After Failed Oral Intubation **Key Point:** When Plan A (oral intubation with direct laryngoscopy) fails after 3 attempts, Plan B recommends **video laryngoscopy or fibreoptic intubation**, either with the patient awake (preferred in anticipated difficult airway) or under general anaesthesia (if already induced). This is the PRIMARY non-surgical alternative before escalating to emergency surgical airway. ### Plan B Hierarchy in DAS Algorithm | Plan | Strategy | Indication | |------|----------|------------| | **Plan A** | Oral intubation with DL ± adjuncts | Initial attempt | | **Plan B** | Video laryngoscopy or fibreoptic intubation | After 3 failed Plan A attempts | | **Plan C** | Supraglottic airway (SGA) as rescue | Failed intubation + can oxygenate | | **Plan D** | Emergency surgical airway (cricothyrotomy) | Failed intubation + cannot oxygenate | ### Why Video Laryngoscopy or Fibreoptic Intubation? 1. **Improved Visualization**: Both techniques provide superior glottic visualization compared to direct laryngoscopy. 2. **Reduced Trauma**: Fibreoptic intubation, especially awake, minimizes airway trauma and swelling. 3. **Reversibility**: Both are reversible techniques; surgical airway is irreversible and reserved for emergency situations. 4. **Evidence-Based**: Meta-analyses show video laryngoscopy has a higher first-pass success rate in difficult airways compared to repeated DL attempts. ### DAS Plan B Decision Tree ```mermaid flowchart TD A[Plan A Failed x3]:::urgent --> B{Patient can be<br/>oxygenated?}:::decision B -->|Yes| C[Plan B: VL or FOI]:::action B -->|No| D[Plan C: SGA as rescue]:::action C --> E{Intubation successful?}:::decision E -->|Yes| F[Secure airway]:::outcome E -->|No| G[Reassess oxygenation]:::action G --> H{Can oxygenate?}:::decision H -->|Yes| I[Plan C: SGA]:::action H -->|No| J[Plan D: Emergency<br/>cricothyrotomy]:::urgent ``` **High-Yield:** The sequence **Plan A → Plan B → Plan C → Plan D** is a cornerstone of NEET PG difficult airway questions. Plan B specifically refers to alternative intubation techniques (VL, FOI), NOT surgical airway. **Mnemonic:** **VFSC** — **V**ideo laryngoscopy, **F**ibreoptic intubation, **S**upraglottic airway, **C**ricothyrotomy (in order of escalation). **Clinical Pearl:** Awake fibreoptic intubation is the gold standard for anticipated difficult airway in the elective setting because it preserves spontaneous breathing and allows for gradual airway assessment without the risk of complete obstruction.