A Case of Dirhythmic Breathing

Escribano, P. Martín; Iñiguez, R. Melchor; Abreu, João; Frade, J. Palomera; Cruz, Roxana

doi:10.1378/chest.97.4.1018

Cited by 3 publications

(1 citation statement)

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“…Periodic breathing is well known [26,27], but in periodic breathing tidal volume and frequency alter together in an exaggeration of the normal tendency for larger breaths to be longer breaths. Neurological, cardiovascular or respiratory disease can disrupt ventilatory patterns, but both rhythm and volume tend to be affected [28,29]. Breathing that alternates between shorter, smaller breaths and longer, larger breaths can be explained by oscillations in chemical stimuli, although it usually requires low ventilatory frequencies and quite large chemical oscillations.…”

Section: Discussionmentioning

confidence: 99%

Bimodality of expiratory time in patients anaesthetized with propofol

Goodman

1995

British Journal of Anaesthesia

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In the records of breathing from five of 32 patients in two previous studies, the distribution of expiratory times appeared bimodal. Records of breathing from another 40 patients anaesthetized for up to 1 h with propofol infusions were examined; there was clear evidence of bimodality in the distribution of expiratory time in 14 records. The bimodality was independent of tidal volume or inspiratory time, and seemed to be caused largely by differing durations of expiratory pause. In six records there was a change of state between unimodality and bimodality. There was no obvious common factor to explain the bimodality or why a change of state should occur.

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Section: Discussionmentioning

confidence: 99%