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Published on: April 12, 2019
Positive end-expiratory pressure modulates perfluorochemical evaporation from the lungs
D Trevisanuto1, M J Jeng, C M Weis
1Department of Pediatrics, Padua University, Padua, Italy. trevo@child.pedi.unipd.it
Biology of the Neonate
|August 2, 2003
Summary
Positive end-expiratory pressure (PEEP) significantly impacts perfluorochemical (PFC) elimination in rabbits. Lowering PEEP from 5 to 0 cm H2O reduced PFC elimination, highlighting PEEP
Area of Science:
- Respiratory Physiology
- Pharmacokinetics
- Liquid Ventilation
Background:
- Perfluorochemicals (PFCs) are explored for lung applications.
- Understanding PFC elimination is crucial for optimizing liquid ventilation strategies.
Purpose of the Study:
- To investigate the effect of varying positive end-expiratory pressure (PEEP) levels on perfluorochemical elimination profiles (E(L)).
Main Methods:
- Perflubron was instilled in anesthetized rabbits.
- Ventilation parameters (minute ventilation, mean airway pressure) were kept constant.
- PEEP levels were randomly altered (0, 1, 3, 5, 10 cm H2O) for 15-minute intervals.
- PFC content in expired gas was measured to calculate E(L).
Main Results:
- A significant reduction in E(L) was observed when decreasing PEEP from 5 to 0 cm H2O.
- No significant differences in E(L) were found when increasing PEEP from 5 to 10 cm H2O.
- PEEP levels demonstrably influence PFC elimination dynamics.
Conclusions:
- PEEP is a critical factor affecting PFC elimination profiles during partial liquid ventilation.
- Consideration of both E(L) and PEEP levels is recommended for optimizing PFC administration.
- Further research may refine PEEP settings for enhanced therapeutic efficacy.
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