Related Experiment Videos
Perfusate composition and edema formation in isolated rat lungs
Experimental Lung Research
|March 1, 1980
Summary
Maintaining isolated rat lungs free of alveolar edema requires specific perfusate compositions. Adding glucose and bovine serum albumin (BSA) or using a synthetic plasma-stimulating solution (SPSS) significantly prolonged lung perfusion duration.
Area of Science:
- Physiology
- Biochemistry
Background:
- Isolated perfused lung models are crucial for studying lung physiology and edema formation.
- Understanding perfusate composition is key to extending lung viability in vitro.
Purpose of the Study:
- To evaluate the impact of perfusate composition on the duration of lung perfusion before alveolar edema development.
- To identify optimal artificial media for prolonged isolated lung perfusion.
Main Methods:
- Isolated ventilated rat lungs were perfused in a recirculating system at controlled flow rates (25 ml/min and 12 ml/min).
- Various perfusates were tested, including Krebs-Ringer bicarbonate solution (KRB) alone, with glucose, with bovine serum albumin (BSA), and a synthetic plasma-stimulating solution (SPSS).
- Time to development of alveolar edema and survival duration were recorded.
Main Results:
- Perfusion with KRB alone resulted in edema within 40-85 minutes.
- Addition of glucose or BSA individually extended perfusion time; combined glucose and BSA, or SPSS, significantly prolonged survival.
- At a reduced flow rate of 12 ml/min, 100% survival was achieved for 5 hours with glucose/BSA or SPSS perfusates.
Conclusions:
- Prolonged lung perfusion is achievable using colloid-free artificial media.
- Both mechanical factors (flow rate) and metabolic components (glucose, BSA) are critical for preventing alveolar edema in isolated perfused lungs.