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Year : 2021  |  Volume : 10  |  Issue : 1  |  Page : 82-87

Comparison of intubating conditions using “spray-as-you-go” technique versus transtracheal instillation of lignocaine for airway topical anesthesia during awake nasal fiberoptic intubation

1 Department of Anaesthesia, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, Karnataka, India
2 Department of Anaesthesia, Dharwad institute of Mental Health and Neurosciences, Dharwad, Karnataka, India
3 Department of Anaesthesia, NMC Speciality Hospital, Al Ain, UAE

Correspondence Address:
Dr. Priyanka G Kini
Department of Anaesthesia, Kasturba Medical College, Manipal Academy of Higher Education, Manipal, Karnataka
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/ijrc.ijrc_127_20

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Introduction: Awake fiberoptic intubation (AFOI) is the gold standard for the management of recognized difficult airway. Good airway anesthesia along with sedation is necessary to ensure patient comfort. Aim: The aim of the study was to evaluate topical lignocaine administered by “spray-as-you-go” versus transtracheal injection technique on intubating conditions during AFOI. Patients and Methods: After obtaining written informed consent, 36 patients were randomly allocated to one of two groups: Group T – transtracheal technique and Group S – Spray-as-you-go technique. All patients were sedated with intravenous dexmedetomidine infusion titrated to a Ramsay Sedation Score of 2–3 during AFOI. All patients received oral gargle and nasal packing with lignocaine 2%. Patients in Group T received 2 mL lignocaine 2% intratracheally just prior to beginning fiberscopy. Patients in Group S received 2 mL lignocaine 2% spray over the vocal cords and another 2 mL below the vocal cords during fiberscopy. Tracheal intubation was then performed. Primary outcome measure was a composite score of patient comfort. Secondary measures were intubation and fiberscopy time, adverse effects, and postoperative patient evaluation. Results: The demographic data were comparable. A composite score of <10 was considered optimal, 10–15 as acceptable, and >15 unacceptable. Significantly more patients in Group T had optimal composite score compared to Group S. There were no differences between the two groups as regards postintubation score, ease of intubation, and postoperative survey. Conclusion: During awake nasal fiberoptic intubation, in comparison with spray-as-you-go technique, the transtracheal instillation of lignocaine improves patient tolerance and comfort during tracheal intubation and provides better patient satisfaction.

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