ESTIM Flashcards
(40 cards)
what does the pt feel
the current
pulsed curent
starts and stops
rapid on and off - excites the nerve and muscle
monophasic
current flow in one direction
leave charge in the tissue - polar effect
biphasic
the current flows in two direction
no net current left
continuous current - effect
there is no neuromuscular effect
pulse width
duration
pulse amp
intensity
pulse rate
freq
what is a phase
current flow in a single direction
a pulse may have one or more phases
what is pulse duration
sum of time for all phases of the pulse
what happens when we increase pulse duration
increases the recruitment of nerve fibers of progressively smaller size
more motor unit recruited
what is pulse amp
intensity of the stimulus
what happens with we increase pulse amp
increase the depth of stimulation - recruit more nerve fibers of the same size
greater the amp - more more units recruited
what happens with greater pulse duration and peak amp
more painful stim - discomfort
what is pulse rate
the rep. of each pulse
what happen as pulse rate increases
the firing rate of a nerve incerase
more motor units fire more freq.
1-10 pps
twitch
10-30 pps
unfused tetany
=>30 pps
tentatic muscle contraction
what is the edge effect
current takes the shortest path between electrodes
closer electrode less deep
what is Motor Point
the point where the muscle is at its highest excitability
what is a surge
ramp to peak intensity also ramp to decrease
what is a muscle twtich
a brief, sudden muscle movement
tetany
involuntary muscle contractions and overly stimulated peripheral nerves