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Previous Volume 338:1388-1389 May 7, 1998 Number 19 Next

	Since this article has no abstract, we have provided an extract of the first 100 words of the full text and any section headings.

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To the Editor: We are concerned about the implication in Hillberg and Johnson's review of noninvasive ventilation (Dec. 11 issue)¹ that noninvasive pressure-cycled ventilation is more comfortable than volume-cycled ventilation and more desirable for patients with chronic respiratory failure. On the contrary, with bilevel positive airway pressure, the increased flows that compensate for leaks often cause patients to gag and can disrupt sleep. Indeed, when portable volume ventilators first became available, in 1978, many patients were switched from portable pressure to volume-cycled ventilators for reasons that included the comfort provided by the smoother flows and adjustable flow rates of the . . . [Full Text of this Article]

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