In:
Acta Anaesthesiologica Scandinavica, Wiley, Vol. 51, No. 1 ( 2007-01), p. 82-85
Abstract:
Background: This prospective, randomized, crossover study had two purposes: first, to determine whether pressure‐controlled ventilation (PCV) is safer than volume‐controlled ventilation (VCV) by preventing gastric insufflation in children ventilated through an laryngeal mask airway (LMA); second, to assess whether the measurement of LMA leak pressure (P leak ) is useful for preventing leakage during positive pressure ventilation (PPV). Methods: Forty‐one, 2 to 15‐year‐old children underwent general anesthesia with an LMA. The expiratory valve was set at 30 cmH 2 O and P leak was measured using constant gas flow. Children were randomly ventilated using PCV or VCV for 5 min in order to reach a P ET CO 2 not exceeding 45 mm Hg, and then they were ventilated with the alternative mode. If the target P ET CO 2 could not be obtained in one mode, we switched to the other. If both modes failed, children were intubated. Tidal volumes, P ET CO 2 and airway pressures were noted and compared between modes. Gastric insufflation was checked by epigastric auscultation. Results: PCV provided more efficient ventilation than VCV, as targeted P ET CO 2 was obtained without gastric insufflation using PCV in all cases except one, whereas VCV failed in three cases. No gastric insufflation occurred when ventilating below peak. Conclusions: These findings suggest that in the age group studied, PCV is more efficient than VCV for controlled ventilation with a laryngeal mask. Gastric insufflation did not occur with this mode.
Type of Medium:
Online Resource
ISSN:
0001-5172
,
1399-6576
DOI:
10.1111/aas.2007.51.issue-1
DOI:
10.1111/j.1399-6576.2006.01148.x
Language:
English
Publisher:
Wiley
Publication Date:
2007
detail.hit.zdb_id:
2004319-3
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