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The esophageal detector bulb in the aeromedical setting
Gregory W Hendey1, Greggory S Shubert, Marc Shalit
1UCSF-Fresno, University Medical Center, Fresno, California 93702, USA.
The Journal of Emergency Medicine
|September 10, 2002
Summary
The Esophageal Detector Bulb (EDB) showed 96% accuracy in confirming endotracheal tube placement in aeromedical transport. While useful, EDB results require careful interpretation alongside other confirmation methods.
Area of Science:
- Emergency Medicine
- Critical Care
- Aeromedical Transport
Background:
- Accurate endotracheal tube (ETT) placement is critical for patient survival during transport.
- The Esophageal Detector Bulb (EDB) is a commonly used device for confirming ETT placement.
- Its efficacy in the unique aeromedical environment requires validation.
Purpose of the Study:
- To evaluate the accuracy of the Esophageal Detector Bulb (EDB) for confirming endotracheal tube (ETT) placement in the aeromedical setting.
- To determine the sensitivity, specificity, and overall accuracy of the EDB in this population.
Main Methods:
- Prospective, observational study of intubated patients transported via aeromedical services over two years.
- Flight personnel recorded EDB results, clinical exam findings, pulse oximetry, and capnography (ETCO2).
- Final ETT confirmation by prehospital ETCO2 or receiving emergency physician.
Main Results:
- 104 EDB assessments were performed on 53 patients.
- The EDB correctly identified 4/5 esophageal intubations and 96/99 tracheal intubations.
- Sensitivity: 80% (95% CI, 38-96%); Specificity: 97% (95% CI, 92-99%); Overall Accuracy: 96% (95% CI, 90-98%).
Conclusions:
- The Esophageal Detector Bulb (EDB) is a valuable tool for aeromedical crews to assess endotracheal tube (ETT) position.
- EDB performance demonstrates high accuracy but should be interpreted alongside other confirmation methods.
- Careful consideration of all available data is essential for ensuring correct ETT placement in aeromedical transports.