ABSTRACT
The authors relate the results of studies carried out on an outfit model for laser angioplasty designed on the basis of exiplex laser. Optimal conditions for laser introduction into a quartz guide have been found. It is shown that the efficacy of interaction between XeCl-laser and tissue rises as the intensity of radiation increases. The energy of radiation at the guide outlet being 9 mJ, the resources of fiber work remained at a high level (greater than 10(4) impulses) whereas high velocity of tissue evaporation allowed elimination of an area 3 mm3 in volume during 1 minute, with the rate of impulse repetition amounting to 10 Hz.
Subject(s)
Angioplasty, Laser/methods , Angioplasty, Laser/instrumentation , HumansABSTRACT
High sensitivity of biological objects to magnetic fields is shown on the basis of an analysis of the literature data and the authors' own studies. The intensity of the biological action of magnetic fields depends on the biotropic parameters of the field, while the pattern of the response depends upon the functional status of the living system. The morphofunctional changes developing in response to the effect of the magnetic field are initially adaptive. The development of pathological changes indicates a failure of the adaptive mechanisms. The authors distinguish the following components in the mechanism of biological action of magnetic fields: (1) quantum-biochemical interaction of the magnetic field with the biological substrate, (2) reception by the living system of the results of the magnetic field effect, (3) response of the system to the magnetic field.
