Awake fiberoptic intubation
Formal Definition
Awake fiberoptic intubation (AFOI) — a technique for placing an endotracheal tube through the vocal cords and into the trachea while the patient remains awake or under minimal sedation, using a flexible fiberoptic bronchoscope (or video laryngoscope with flexible tip) as the visual guide; performed when the airway is anticipated difficult and spontaneous ventilation must be preserved (severe cervical spine limitation, large oral/pharyngeal tumor, radiation changes, anatomical variant, history of difficult intubation, unstable C-spine fracture requiring in-line protection); requires careful topical anesthesia (lidocaine spray/atomizer to oropharynx, superior laryngeal nerve block, cricothyroid membrane injection if needed) and procedural sedation (typically low-dose remifentanil, dexmedetomidine, or minimal midazolam/fentanyl) while preserving airway reflexes.
How It's Used on the Ward
"Awake fiberoptic" or "awake FOI" or "awake scope" — the gold-standard technique for anticipated difficult airway, especially in the patient with severe cervical spine pathology, prior radiation, large oral mass, or anatomical variant (micrognathia, large tongue, limited mouth opening); preserves spontaneous ventilation, allows the patient to follow commands, and is safer than crashing a known difficult airway under general anesthesia.
Example
""54-year-old with severe ankylosing spondylitis, cervical spine completely fused in flexion deformity, presenting for elective cervical spine fusion for myelopathy. Restricted neck extension, restricted mouth opening (Mallampati 4). Anesthesia plan: awake fiberoptic intubation. Topicalization: 4% lidocaine atomizer to oropharynx, superior laryngeal nerve block with 2% lidocaine, transtracheal injection via cricothyroid membrane. Sedation: dexmedetomidine infusion, low-dose remifentanil. Procedure: flexible bronchoscope loaded with 7.5 ETT advanced through nasopharynx, vocal cords identified, scope passed into trachea, ETT advanced over scope into trachea, position confirmed by capnography. Patient tolerated procedure well, breathing spontaneously throughout, no desaturation. Induced for surgery after tube secured and bilateral breath sounds confirmed.""
Clinical Context
Why "awake": preserving spontaneous ventilation is the safety feature; if you cannot intubate an awake patient using fiberoptic technique, you have still not lost the airway because the patient is breathing on their own. This contrasts with the "induction then attempt to intubate" approach for known difficult airway, where failure to intubate AND failure to ventilate by mask can lead to a "cannot intubate cannot ventilate" emergency. Step-by-step: (1) Pre-medicate (glycopyrrolate to dry secretions, low-dose anxiolysis). (2) Topical anesthesia (atomizer spray, nerve blocks). (3) Light sedation (dexmedetomidine, remifentanil). (4) Oxygen via nasal cannula or scope (some fiberscopes have working channels for insufflation). (5) Scope loaded with ETT inserted into oropharynx or nostril. (6) Phonation/laryngeal anatomy identified. (7) Vocal cords visualized, scope passed into trachea (carina visible). (8) ETT advanced over scope. (9) Tube position confirmed (capnography, bilateral breath sounds). (10) Patient induced for general anesthesia. Risks: (1) Failure (operator experience essential). (2) Bleeding from nasal/oropharyngeal trauma. (3) Laryngospasm despite topicalization. (4) Trauma to vocal cords. (5) Patient discomfort if topicalization insufficient. (6) Aspiration if topicalization blocks glottic reflexes during sedation. Alternatives: video laryngoscopy, awake videolaryngoscopy, retrograde intubation, surgical airway. ASA difficult airway algorithm incorporates awake fiberoptic as preferred approach for anticipated difficult airway when feasible for the operator.