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  • Title: Clinical effects of heliox administration for acute bronchiolitis in young infants.
    Author: Cambonie G, Milési C, Fournier-Favre S, Counil F, Jaber S, Picaud JC, Matecki S.
    Journal: Chest; 2006 Mar; 129(3):676-82. PubMed ID: 16537867.
    Abstract:
    OBJECTIVE: To assess the effect of heliox, a helium-oxygen mixture, on respiratory distress symptoms in young infants. DESIGN: Prospective, randomized, double-blind study. SETTING: Pediatric ICU (PICU) of a university hospital. PATIENTS: Twenty infants, all < 3 months old, admitted to the PICU with moderate-to-severe acute respiratory syncytial virus bronchiolitis. INTERVENTIONS: All infants were randomly and blindly assigned to inhale either heliox or an air-oxygen mixture (airox) for 1 h under an oxyhood. MEASUREMENTS AND RESULTS: After 1 h, the respiratory distress score was significantly lower in the heliox group compared with the airox group (3.05 vs 5.5, p < 0.01), with a significant reduction in accessory muscles use (p < 0.05) and expiratory wheezing (p < 0.01). In contrast, inspiratory breath sounds and cyanosis did not significantly differ between groups. The ex-premature infants of the heliox group had a higher respiratory distress score at baseline compared with the term infants of this group (5.8 vs 5.2, p < 0.05) and a comparable decrease in the score at 60 min. CONCLUSIONS: In young infants, even those born prematurely, heliox breathing induced a rapid reduction in accessory muscles use and expiratory wheezing. Further studies are needed to confirm the decreased respiratory muscle work of breathing during heliox inhalation in this population.
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