high volt Flashcards
definition
very short phase duration
high driving peak voltage
to stimulate deep excitable tissue
the current must be high enough to reach that tissue w/o stimulation nociceptors
how do we get the amplitude for noxious stimulation
short duration of the waveform
high amplitude
indications
tissue healing for various wounds
–> pressure ulcers, slow healing superficial wounds, diabetic ulcers
pelvic floor spasms
precautions
prevent cross contamination with open wounds
wear PPE
do not cross over hemorrhaging area
clear necrotic tissue before application
ensure coupling medium is warm to prevent chilling the wound which would slow healing
electrode placement
placed around or over wound
either anode or cathode can be used at any stage of healing
start w/ (+) anode in inflammatory stage
switch to cathode (-) for proliferation and maturation phase
protocols
stimulating wound repair
edema control
germicidal effect
anti spasmodic effect
electro-taxis
stimulating wound repair
injured skin, muscles, and nerves have an injury current that play a role in healing
HVPC works on endogenous electrical current to enhance healing process and bring balance back to area as the wound heals
stimulating wound repair –> parameters –> amplitude
150-500 V
comfortable sensory perception w/o motor
pins and needles
stimulating wound repair –> parameters –> pulse duration
65-200 usec
stimulating wound repair –> parameters –> pulse frequency
80-100 pps
stimulating wound repair –> parameters –> electrode placement
monopolar w/ active electrode in the wound
stimulating wound repair –> parameters –> polarity
negative to attract fibroblasts
positive to attract macrophages
stimulating wound repair –> parameters –> length of treatment
1-4 sessions a day for 1 hour
edema control –> parameters –> amplitude
250-500 V
tetanic response with 10/10 duty cycle
acts as a muscle pump
edema control –> parameters –> pulse duration
100 usec
edema control –> parameters –> pulse frequency
50 pps
edema control–> parameters –> electrode placement
monopolar
edema control –> parameters –> polarity
negative
edema control –> parameters –> length of treatment
10-30 min
2x/day
germicidal effect
monophasic waveforms inhibit growth of germs at wound site
either anode or cathode can be used
anti spasmodic effect
induces muscle fatigue
pelvic floor parameters
anti spasmodic effect –> pelvic floor parameters –> amplitude
strong but comfortable contraction
anti spasmodic effect –> pelvic floor parameters –> pulse duration
100 usec
anti spasmodic effect –> pelvic floor parameters –> pulse frequency
80 pps
anti spasmodic effect –> pelvic floor parameters –> electrode placement
bipolar
anti spasmodic effect –> pelvic floor parameters –> polarity
negative electrode is intravaginal or intrarectal
anti spasmodic effect –> pelvic floor parameters –> length of treatment
60 minutes
3 days
electro-taxis
the migration of cells to the anode or cathode
attracts healing cells in the area of the wound
repulses albumin proteins that cause edema
electro-taxis –> ions in each stage of healing
acute inflammatory
proliferation and maturation
acute inflammatory
neutrophils (-)
macrophages (-)
lymphocytes (+)
platelets (+)
proliferation and maturation
fibroblasts (+)
keratinocytes (+)
epidermal cells (+)
