In the DAS difficult airway algorithm, what is the MAXIMUM number of intubation attempts recommended before calling for help and moving to the next plan?

Explanation

## DAS Difficult Airway Algorithm — Attempt Limits **Key Point:** The DAS algorithm recommends a MAXIMUM of 2 intubation attempts by the initial operator before escalating to senior help and alternative techniques (Plan B, C, D). ### Rationale for 2-Attempt Rule **High-Yield:** Each failed intubation attempt: - Causes airway trauma and edema - Increases risk of aspiration - Reduces time window for rescue maneuvers - Increases patient anxiety and sympathetic response - Worsens visualization on subsequent attempts ### DAS Algorithm Flow for Failed Intubation ```mermaid flowchart TD A[Difficult Airway Anticipated]:::outcome --> B[Attempt 1: Direct Laryngoscopy]:::action B --> C{Success?}:::decision C -->|Yes| D[Tube secured]:::outcome C -->|No| E[Attempt 2: Alternative blade/technique]:::action E --> F{Success?}:::decision F -->|Yes| D F -->|No| G[Call for senior help]:::urgent G --> H[Plan B: Videolaryngoscope/Bougie]:::action H --> I{Success?}:::decision I -->|No| J[Plan C: Supraglottic airway]:::action J --> K{Oxygenation adequate?}:::decision K -->|No| L[Plan D: Emergency surgical airway]:::urgent ``` ### Key Principles | Principle | Details | |-----------|----------| | **2-attempt rule** | Maximum 2 attempts by initial operator | | **After 2 failures** | Call senior anesthetist immediately | | **Plan escalation** | Move to Plan B (videolaryngoscope), then Plan C (SGA), then Plan D (surgical) | | **Oxygenation priority** | Maintain oxygenation throughout; never abandon this | | **Time limit** | Total time for intubation attempts should not exceed 10 minutes | **Clinical Pearl:** The "2-attempt rule" is not about stubbornness — it is about recognizing early that a different approach is needed. Each attempt increases airway edema exponentially, making subsequent attempts harder. **Mnemonic:** **PLAN** = **P**repare, **L**ook (attempt 1), **A**sk for help (after 2 failures), **N**ext plan (B, C, D) **Warning:** Continuing attempts beyond 2 without changing technique is a common error in difficult airway management and increases morbidity. Senior help should be summoned EARLY, not as a last resort.