ultrasound Flashcards
what form of energy is ultrasound
mechanical energy
a mechanical vibration beyond hearing
ultrasound
is US beam uniform or not
not uniform
the beam nearest head is known as
near field, interference field or Frenzel zone
sends high frequency soundwave through tissue and has thermal effect
therapeutic ultrasound
how does tissue impendence determined
by density and elasticity
how max transmission achieved
the greater the diff in impedance at a boundary the greater the reflection tht will occur so as the amount of energy transferred will be smaller
how to minimize impedance different
suitable COUPLING MEDIUM [a fluid to fill any available places] to be used
what does US absorption follows
it follows EXPONENTIAL PATTERN ie more energy absorbed superficially also higher protein =higher absorption
the preferable mode of treatment especially in acute lesion
pulsed ultrasound
non thermal effects of US
cavitation
acoustic
micromassage
formation of gas filled void in tissues and body fluid
cavitation
what are the phases of tissue repair
inflammatory
proliferative
remodeling
the types of ultrasound application
full contact
in H2O
