Globus HT-922, Instruction Manual

Page: 16 / 40

16
ACTION MECHANISM OF THE ULTRASOUNDS
Mechanical effects:
the mechanical action is due to the movement of the tissues
particles crossed by the ultrasonic wave.
Although the movement endured from single particles is small, the
pressure variations that it produces are so considerable to
generate important mechanical effects on tissues.
The induced mechanical modifications determine:
a)acceleration of the processes of diffusion through cellular
membranes.
b)complex molecule division (proteins, polysaccharides., etc).
c)tissue Micromassage.
Thermic effects;
the passage of ultrasounds through "the soft" tissues creates an
elevation of the temperature for:
-absorption due to the viscosity,
-absorption due to the thermic conductivity and chemical
absorption.
The ultrasounds produce heat through the vibrations, the collision
and the friction of the cellular and intercellular structures that
compose the tissues, crossed by the sonorous waves. The thermal
elevation generates, as secondary effects, an increasing of the
cellular metabolism and vasodilatation.
Chemical effects:
the chemical action with modification of the local ph, the
permeability of cellular membranes and with molecular changes
is caused by the remarkable forces of acceleration to which
particles of the tissues are subjected at the passage of the
ultrasonic wave.