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  • Title: Use of the Rapiscope vs chest auscultation for detection of accidental bronchial intubation in non-obese patients undergoing laparoscopic cholecystectomy.
    Author: Ezri T, Khazin V, Szmuk P, Medalion B, Shechter P, Priel I, Loberboim M, Weinbroum AA.
    Journal: J Clin Anesth; 2006 Mar; 18(2):118-23. PubMed ID: 16563329.
    Abstract:
    STUDY OBJECTIVE: Main stem bronchial intubation is not always detected by routine means and may occur more frequently during laparoscopic procedures. Tracheal tube positional changes in non-obese patients undergoing laparoscopic cholecystectomy were detected by either the Rapiscope (Cook Critical Care, Bloomington, Ind) or chest auscultation. DESIGN: Prospective, double-blind, crossover study. SETTING: University hospital. PATIENTS: Forty non-obese patients (BMI <28 kg.m(-2)), aged 18 to 80 years, American Society of Anesthesiologists risk class I-III, who underwent elective laparoscopic cholecystectomy were enrolled in this double-blind, prospective study. INTERVENTIONS: After endotracheal intubation by one anesthesiologist, two other anesthesiologists assessed the tracheal tube's positioning by either the Rapiscope or chest auscultation; the results of one anesthesiologist's measurement were concealed from the other. MEASUREMENTS: Assessments of the endotracheal tube tip's position were performed after intubation, head-down, and head-up positioning, after maximal abdominal insufflation and before extubation. At the same time points, Sp(O2), ET(CO2), and peak inspiratory pressures were also recorded. MAIN RESULTS: Postintubation Rapiscope assessment revealed normal tracheal positioning of the tube's tip in all patients. Changes in tube's position were subsequently detected by the Rapiscope in 16 patients. In 8 cases, the tip moved endobronchially. Half of the endobronchial intubations occurred after maximal abdominal insufflation and the other half after changing the table position from neutral to 30 degrees head-down. Chest auscultation detected bronchial intubation in two cases only (P = .01). There were 4 additional events of downward movements and 4 events of cephalad migration of the tube's tip identified by the Rapiscope only. ET(CO2), Sp(O2), and peak inspiratory pressures did not change in patients who did experience bronchial intubation. CONCLUSION: The Rapiscope detected significantly more events of endobronchial intubation as compared with chest auscultation; it could be considered useful during procedures where tracheal tube movements are potential.
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