Continuous‐flow apneic ventilation with small endobronchial catheters

L. Bunegin, G. C. Bell, J. Gelineau, R. B. Smith

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


This study compares gas exchange and hemodynamic parameters during bronchial insufflation with two different internal diameter (ID) catheters (2.5 and 1.4 mm) at a constant mean gas exit velocity. Anesthetized, paralyzed dogs were instrumented to monitor arterial, central venous, and airway pressures, blood gases, temperature, ECG, and ventilated using continuous flow apneic ventilation (CFAV) via 2.5‐mm or 1.4‐mm ID bronchial insufflation cathethers positioned 1.25 bronchial diameter units (BDU) beyond the carina. Initially, flow was adjusted to provide adequate oxygenation and ventilation through the 2.5‐mm ID catheters. After a 30‐min stabilization, physiological parameters were recorded and the mean gas exit velocity was calculated. The 2.5‐mm ID insufflation catheters were then replaced by 1.4‐mm ID catheters and the bronchial insufflation flow adjusted so as to produce the same mean gas exit velocity as for the 2.5‐mm ID catheters. After a 30‐min stabilization period, physiological parameters were again recorded. No significant differences were noted in arterial, central venous, or airway pressures, temperature, heart rate, pH, Paco2, and Pao2 between the 2.5‐mm and 1.4‐mm ID bronchial insufflation catheters. However, significantly less bronchial insufflation flow (69.7%) was required to maintain oxygenation and ventilation for the 1.4‐mm ID bronchial insufflation catheters.

Original languageEnglish (US)
Pages (from-to)603-606
Number of pages4
JournalActa Anaesthesiologica Scandinavica
Issue number8
StatePublished - Nov 1988


  • Apneic ventilation
  • continuous flow apneic ventilation (CFAV)

ASJC Scopus subject areas

  • Anesthesiology and Pain Medicine


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