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Updated: May 12, 2026

Topical Airway Anesthesia for Awake-endoscopic Intubation Using the Spray-as-you-go Technique with High Oxygen Flow
Published on: January 13, 2017
Use of apneic oxygenation for the performance of pan-endoscopy
Burkard Rudlof1, Winfried Hohenhorst
1Zentralinstitut für Anästhesie, Klinikverbund St. Antonius und St. Josef, Wuppertal, Germany. burkard.rudlof@cellitinnen.de
Objective:
To evaluate the efficacy of apneic oxygenation for the performance of pan-endoscopy.
Study Design:
Clinical retrospective study.
Setting:
A university teaching hospital in Wuppertal, Germany.
Subjects:
Forty-seven patients who underwent pan-endoscopy under apneic oxygenation during a period of 1 year.
Methods:
After preoxygenation and induction of anesthesia, an 8 French catheter was introduced into the trachea for oxygen supply. Pan-endoscopy was carried out, as long as there were no signs of desaturation. The data were collected retrospectively from the anesthesia charts.
Results:
Apnea was well tolerated up to 45 minutes in most of the patients. In 2 patients, the method was carried out incorrectly, and in 1 obese patient, it was not possible to get an acceptable oxygenation.
Conclusion:
With appropriate monitoring, sufficient nitrogen elution, and proper patient selection, we believe that this technique is superior to jet ventilation and intubation for pan-endoscopy, allowing unimpeded operative visualization.
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