Ch 11 Estim

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Author:
amills1
ID:
259177
Filename:
Ch 11 Estim
Updated:
2014-01-29 21:32:41
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11 Estim
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Ch 11 Estim
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  1. Electrical current
    flow of charged particles measured in amps
  2. 3 types of wave forms
    • DC
    • AC
    • pulse
  3. AC
    • biphasic
    • can be unbalanced
    • can be asymmetrical
    • used for pain control and muscle contraction
  4. Pulse duration
    how long from the beginning of 1st phase of a pulse to the end of last phase of a pulse
  5. in ac two ____ equal a pulse
    phases
  6. amplitude
    • flow rate of charged particles
    • current
    • V=IR
  7. frequency
    number of cycles or pps and measured in hertz
  8. on time
    when train of pulses occur
  9. off time
    between pulses when no current flows
  10. ramp up
    time it takes for current amplitude to increase after 0 to max amplitude
  11. ramp down
    time takes to decrease from max amp to 0
  12. effects of electrical currents
    • AP stimulation
    • direct muscle depolarization
  13. contras
    • pacemaker
    • unstable arrhythmia
    • over carotids
    • over thrombosis
    • pregnancy
  14. precautions
    • cardiac disease
    • impaired sensation/mentation
    • malignancy
    • skin irritation
    • open wound
  15. adverse effects
    • burns
    • skin irritation
    • pain
  16. documentation
    • area treated
    • patient position
    • stim parameters
    • electrode placement
    • treatment duration
    • patient response
  17. resting membrane potential is ____
    negative
  18. relative refractory perioid
    hyperpolarized due to coming down from AP
  19. absolute refractory period
    won't get any more positive or a larger reaction
  20. cathode is ____
    negative
  21. anode is __
    positive

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