Continuous Flow Ventilation Without Respiratory Movement in Cat, Dog and Human

Perl, András; Whitwam, J. G.; Chakrabarti, M.K.; Taylor, Val

doi:10.1093/bja/58.5.544

Cited by 15 publications

(1 citation statement)

References 2 publications

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“…Moreover, use of minimum flows for EI is relevant to EI use during nonemergency clinical situations in view of disadvantages of high flows that include mucosal damage (15), pneumothorax (16), elevation of alveolar pressure with a decrease in arterial pressure (17), and cooling (8).…”

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Low-Flow Endobronchial Insufflation With Air for 2 Hours of Apnea Provides Ventilation Adequate for Survival

Mackenzie

Barnas²,

Smalley³

et al. 1990

Anesthesia & Analgesia

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We tested the efficacy of low-flow endobronchial insufflation (EI) with air, as it may be useful in emergency situations in which positive-pressure mechanical ventilation is not possible. The only equipment required is a source of compressed air with flow controller and a specially designed insufflation catheter. The insufflation catheter has forked ends that can be positioned blindly in the mainstem bronchi. In six anesthetized, apneic dogs averaging 9.6 kg, we determined that the average air flow needed to maintain PaO2 above 45 mm Hg and PaCO2 below 65 mm Hg after 30 min was 2.5 L/min. At these flow rates, all dogs survived 2 h of endobronchial insufflation with no neurologic dysfunction. The small internal diameters (0.8 mm) of the catheter ends increase gas exit velocity and allow for adequate oxygenation and CO2 removal at low flow rates. Endobronchial insufflation could also be employed with cricothyroidotomy and a compressor for emergency situations in the field involving mass casualties, where oxygen supplies and equipment are limited.

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confidence: 99%