ABSTRACT
Diodes-laser silver arsenide-aluminium (Ga-Al-As) 904 nm, which was used because of its properties of good tissue penetration and manageability, applied 5 min daily for 5 days at 3,000 Hz of frequency (energy density = 3 J), promoted healing of experimental wounds in rats from both a microscopic and histologic point of view. The same laser applied in these experimental conditions (number of rats was eight for each group) at the same energy density (3 J) for 10 min daily during 5 days at 1,500 Hz of frequency did not affect the experimental wounds.
Subject(s)
Laser Therapy , Wound Healing/radiation effects , Animals , Dose-Response Relationship, Radiation , Rats , Rats, Inbred StrainsSubject(s)
Lung/physiology , Smoke , Animals , Elasticity , Lung/metabolism , Phosphatidylcholines/analysis , Plants, Toxic , Pressure , Pulmonary Surfactants/metabolism , Rats , Surface Tension , NicotianaABSTRACT
Parts of rat lung tissue have been examined by means of a scanning electron microscope after either chemical or physical fixage. Chemical fixage produces retraction on the tissue structures and the alveoles appear of irregular shape. Physical fixage gives the possibility to observe lung morphology without distorsions; details reproduced are in this case very clear and in a shape which appears very close to the original conditions.
Subject(s)
Lung/anatomy & histology , Microscopy, Electron, Scanning , Animals , Histological Techniques , RatsSubject(s)
Closing Volume , Lung Diseases, Obstructive/diagnosis , Lung Volume Measurements , Adult , Female , Humans , MaleABSTRACT
The effect of citidin-diphosphocholine and of phospholipids treatments on the elastic properties as well as on the washing liquid physical-chemical properties of rat lungs is studied. Significant increase of the compliance and decrease of the tendency to collapse of the airways are observed after treatment with citidin-diphosphocholine.
