Abstract :
To investigate the effects of electromagnetic pulse (EMP) on the morphology of the rat´ s main organs (lung, kidney, liver, spleen, heart, testicle, ovary, and so on). Light microscope was used to observe the pathological changes in the main organs after the rats were exposed to EMP with respectively 1000, 1100 and 12000 pulses at different time point. After 24 hours exposure to 1000 and 1100 pulses of EMP, the alveolus epithelium were lightly swoln, dilatation and congestion were found in the blood vessel of the alveolar wall and the glomerulus. After 3 clays exposure, the morphostructure of alveolus, glomerulus and the renal tubule got right. There were no significant changes in other organs yet. Shortly after the 12000 pulses exposure and till 24 hours, congestion and swelling became more serious in the lung and the glomerulus with haemorrhage and eosinophils infiltration. The sacculus expanded evidently with a large amount of tubular protein casts. Congestions were also found in the liver, cardiac muscle, testicle, ovary, spleen and wall of digestive tract. The lesion aggravated gradually with dosages increasing. All these changes returned to normal after 3 days exposure. Results suggested that exposure to EMP of 12000 pulses would obviously increase the permeability of the blood vessel, especially in the organs with function of blood exchange barrier such as the glomerular filtration barrier or the air-blood barrier in alveolar wall. Thus the lung and the kidney are the sensitive organs to EMP exposure, their morphological and functional change is a responsive mechanism, which is recoverable.
