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PEDIATRIC ANESTHESIOLOGY

Airway Management in Children: Ultrasonography Assessment of Tracheal Intubation in Real Time?

Bruno Marciniak, MD^*, Pierre Fayoux, MD, Anne Hébrard, MD^*, Renée Krivosic-Horber, MD^*, Thomas Engelhardt, MD, PhD, and Bruno Bissonnette, BSc, MD, FRCPC^||

From the *Pôle d’Anesthésie Réanimation, Hôpital Jeanne de Flandre, CHRU, Rue Eugène Aviné, 59037 Lille Cedex France; UPRES JE2490, Preclinical research group in perinatal medicine, Lille 2 University, Lille, France; U.F. d’ORL pédiatrique, Pôle d’ORL Hôpital Claude Huriez. CHRU Lille, France; Royal Aberdeen Children’s Hospital, Foresterhill, Aberdeen, UK; and ||Department of Anesthesia, Hospital Sick Children, Toronto, Canada.

Address correspondence to Dr. Bruno Marciniak, UF Anesthesie de l’enfant, Pôle d’Anesthesie Reanimation de l’Hopital Jeanne de Flandre, CHRU Lille, Rue Eugene Avine, 59037 Lille Cedex France. Address e-mail to bmarciniak{at}chru-lille.fr.

Abstract

BACKGROUND: Pediatric tracheal intubation requires considerable expertise and can represent a challenge to many anesthesiologists. Confirmation of correct tracheal tube position relies on direct visualization or indirect measures, such as auscultation and capnography. These methods have varying sensitivity and specificity, especially in the infant and young child. Ultrasonography is noninvasive and is becoming more readily available to the anesthesiologist. In this study, we investigated the characteristic real-time ultrasonographic findings of the normal pediatric airway during tracheal intubation and its suitability for clinical use.

METHODS: Thirty healthy children with normal airways requiring tracheal intubation were studied. Ultrasonographic measurements of the pediatric airway during tracheal intubation under deep inhaled anesthesia were performed using a Sonosite Titan® (Sonosite, Bothell, WA) scanner while recording characteristic images during this process. Correct tracheal tube placement was further confirmed using auscultation and satisfactory end-tidal capnography.

RESULTS: The mean (± sd) age of studied patients was 48 ± 37 mo, weight was 19.7. ± 8.6 kg and the sex ratio (m/f) was 1:2. Successful tracheal intubation was verified using the following criteria: 1) identification of the trachea and tracheal rings, 2) visualization of vocal cords, 3) widening of glottis as the tracheal tube passes through, and 4) tracheal tube position above carina and demonstration of movement of the chest wall visceroparietal pleural interface (i.e., sliding sign) after manual ventilation of the lungs. One esophageal intubation was readily recognized by visualization of the tube in the left paratracheal space.

CONCLUSION: This study describes characteristic ultrasonographic findings of the pediatric airway during tracheal intubation. It suggests that ultrasonography may be useful for airway management in children.