US EPA

5916288 

Journal Article 

Perfluorochemical (PFC) combinations for acute lung injury: an in vitro and in vivo study in juvenile rabbits 

Jeng, MJ; Yang, SS; Wolfson, MR; Shaffer, TH 

2003 

1 

Pediatric Research
ISSN: 0031-3998
EISSN: 1530-0447 

Lippincott Williams and Wilkins 

53 

1 

81-88 

English 

12508085 

10.1203/00006450-200301000-00015 

WOS:000180142800014 

Perfluorochemical (PFC) fluids of different physical properties were titrated and tested in vitro for physical properties that are appropriate for respiratory application. Two PFC liquids were studied: perfluoromethylcyclohexane (PP2), a liquid with high vapor pressure and low viscosity, and perfluoromethyldecalin (PP9), a fluid with low vapor pressure and high viscosity. Eighteen rabbits (2.05 +/- 0.07 kg; mean +/- SEM) were lung-lavaged and randomized: group I, control group; group II, partial liquid ventilation with 75% PP2 and 25% PP9; group III, partial liquid ventilation with 50% PP2 and 50% PP9; and group IV, partial liquid ventilation with 25% PP2 and 75% PP9. Ventilator volumes were kept constant during the 4-h experiment. Cardiopulmonary measurements were performed every 30 min. The lung histology was examined. The in vitro study showed PFC [viscosity/vapor pressure (in cS and mm Hg, respectively)] as follows: 100% PP2 (0.88/141); 100% PP9 (3.32/2.9); 75% PP2 and 25% PP9 (1.26/107); 50% PP2 and 50% PP9 (1.63/13.7); and 25% PP2 and 75% PP9 (2.21/4.4). The in vivo experiments found that combinations of moderate vapor pressure (groups 3 and 4) demonstrated good gas exchange, compliance, and histologic findings. Thus, combinations of PFC liquids can be formulated to modulate the physiologic outcome in acutely injured lungs, and may prove useful for alternative PFC liquid applications. 

Animals; Fluorocarbons/pharmacology; In Vitro Techniques; Liquid Ventilation; Lung/drug effects; Rabbits