Shared Flashcard Set

Details

Electro Terminology
Electro Terminology
53
Health Care
Graduate
11/07/2010

Additional Health Care Flashcards

 


 

Cards

Term
excess or deficiency of electrons or ions; expressed in Coulomb (C)
Definition
Charge
Term
quantity of electric charge that passes any cross section of a conductor in 1 sec when the current is maintained constant at 1 ampere
Definition
Coulomb (C)
Term
electrical charge per cross-section area of the electrodes; expressed in C/cm2
Definition
Charge Density
Term
property of having 2 oppositely charged poles
Definition
Polarity
Term
negative pole of an electric current
Definition
Cathode
Term
positive pole of an electric current
Definition
Anode
Term
electromotive force; potential difference btwn 2 points in an electrical field that causes charged particle to move
Definition
Voltage (V)
Term
flow of charged particles moving past a specific point in a specified direction; produced by a difference in potential; measured in amperes (A)
Definition
Current (I)
Term
equals voltage or potential difference btwn 2 points multiplies by current flow btwn those points; P=VI; measure in watts (W)
Definition
Power (P)
Term
property of a conductor that characterizes its opposition to the mvmt of charged particles; directly proportional to the resistivity and length of the conductor; inversely proportional to the cross-sectional area of the conductor; it increases as temperature increases; measured in Ohms (Ω)
Definition
Resistance (R)
Term
property of a conductor that characterizes the relative ease of mvmt of charged particles through that conductor; reciprocal of the resistance; measured in mhos
Definition
Conductance
Term
V=IR; the potential difference is directly proportional to the current flowing through the resistor
Definition
Ohm’s Law
Term
the capacity for storing charge
Definition
Capacitance (C)
Term
measure of the degree to which a varying current can induce an electromotive force in a circuit; expressed in henries (H)
Definition
Inductance
Term
the frequency-dependent opposition to electric current flow; expressed in ohms
Definition
Impedance (Z)
Term
the opposition to current flow produced by capacitance or inductance in a circuit
Definition
Reactance (X)
Term
continuous, unidirectional flow of charged particles; direction is determined by the polarity selected
Definition
Direct Current (DC)
Term
uninterrupted-bidirectional flow of charged particles; may be symmetrical or asymmetrical
Definition
Alternating Current (AC)
Term
isolated electrical event
Definition
Pulse
Term
elapsed time btwn successive pulses
Definition
Interpulse interval
Term
shape of the visual representation of pulsed current on a current/time or voltage/time plot
Definition
Waveform
Term
current flow in one direction for a finite period of time
Definition
Phase
Term
pulse that deviates in one direction from the zero current baseline and returns to the baseline after a finite time
Definition
Monophasic
Term
pulse that deviates in one direction from the zero current baseline and then deviates in the opposite direction from the baseline
Definition
Biphasic
Term
all waveform variables (amplitude, duration, and rate of rise and decay) are identical with respect to baseline for each phase
Definition
Symmetrical
Term
one or more of the waveform variables for each phase are unequal with respect to baseline; can be balanced or unbalanced
a. Balanced—phase charges are equal for each phase
b. Unbalanced—phase charges are unequal for each phase
Definition
Asymmetrical
Term
time elapsed from the beginning to the termination of one phase of a pulse or cycle of AC; expressed in usec or msec; can be used to describe AC waveforms
Definition
Phase Duration
Term
(pulse width); time elapsed from the beginning to the end of all phases plus the interphase interval within one pulse; expressed in usec or msec; cannot be used to describe AC waveforms
Definition
Pulse Duration
Term
(intrapulse interval); time btwn 2 successive components of a pulse when no electrical activity occurs; cannot exceed the interpulse interval
Definition
Interphase interval
Term
time btwn 2 successive pulses
Definition
Interpulse interval
Term
number of pulses per second for pulsed current (pps); AC frequency is expressed in Hz or cycles per second (cps)
Definition
Frequency
Term
reciprocal of frequency; time from a reference point of a pulse to the identical point on the next pulse; in AC the waveform duration equals the period; in pulsed current the period equals the pulse duration plus the interpulse interval; DC has no period
Definition
Period
Term
measure of the magnitude of current with reference to baseline; referred to as intensity
Definition
Amplitude
Term
max amplitude for each phase; the preferred way of expressing amplitude
Definition
Peak Amplitude
Term
max amplitude btwn the 2 phases for biphasic or AC
Definition
Peak-to-peak amplitude
Term
results from the intersection and temporal summation of 2 or more sine waves that differ in frequency; refers to alternating currents; beat frequency expressed in bps
Definition
Beat
Term
the ratio of on time to total time of trains of pulses or bursts; expressed as a percentage; ON:OFF ratios
Definition
Duty Cycle
Term
an interrupted train; a finite series of pulses or cycles of AC delivered at an identified frequency, amp, or duration; burst frequency expressed in bps
Definition
Burst
Term
time elapsed from the beginning to the end of one burst; milliseconds
Definition
Burst duration
Term
1 or more electrodes of the stimulating circuit are placed over the target tissue area and the other(s) are placed at some distance from target tissue
Definition
Monopolar electrode placement
Term
all electrodes of 1 circuit are placed to affect the target area
Definition
Bipolar electrode placement
Term
electrodes from 2 or more circuits are positioned so that currents intersect
Definition
Quadripolar/Tetrapolar electrode placement
Term
use of externally applied electrical stim for pain management
Definition
TENS
Term
use NMES
Definition
Innervated muscle
Term
use DC
Definition
Denervated muscle
Term
estim that has a monophasic waveform with phase durations < 100sec that employs high-driving voltage >150V
Definition
HVPC
Term
use lower-driving voltage <150V
Definition
Low voltage estim
Term
therapeutic use of DC less than 1mA
Definition
LIDC
Term
TENS <10pps
Definition
Low Frequency TENS
Term
TENS > 50pps
Definition
High frequency TENS
Term
NMES 1-1000pps
Definition
NMES Low frequency
Term
NMES 1000-10,000 pps or Hz
Definition
NMES medium frequency
Term
NMES greater than 10,000pps or Hz
Definition
NMES High frequency
Supporting users have an ad free experience!