1. Current Density
    • Meaure the quantity of charged ions moving throught a particular cross sectional area of tissue
    • Most of the current is right under the electrode
  2. Electrodes Size
    Two electrodes are required to complete the current circuit
  3. Electrode size and density
    • Density increases as size decreases
    • Density Decreases as size increases
  4. Properties Small Electrodes
    • Increased current density
    • Increased impedance
    • Decreased current flow
    • less current coming from the electrode
  5. Large Electrodes
    • Decreased current density
    • Decreased Impedance
    • Increased current flow
  6. Sponge Covered Metal Electrodes
    • Reusable
    • Requires straps to secure
    • Lowest Impedance levels
    • Pt tolerates well
  7. Carbon Impregnated Silicon Rubber Electrodes
    • Reusable
    • Require tape to secure
    • Convenient, easy set up
    • Next lowest impedance
  8. Synthetic Electrodes
    • Come prepared with conductive and adhesvie qualities
    • No tape or Strapes required
    • Rexible conductiors, foil, metal mesh, conductive Karaya or synthetic gel
    • Can create HOT SPOTS
    • reused (skin should be cleaned prior to use)
  9. Motor Point Electrode Placement
    • Area where muscle can be stimulated with minimal current levels
    • Located at or near where the motor nerve enters the muscle usually over the muscle belly
  10. Dermatome Electrode Placement
    Floow area of nerve distribution
  11. Relationship of muscle fibers and placement of electrodes
    • along the length of the muscle fibers
    • across muscle fibers
  12. The depth of current flow and electrode placement
    • Close together = superficial current flow
    • Further apart = deeper current flow
    • the space between the electrodes should be at least the diameter of the ACTIVE electrode
  13. Monopolar /unipolar placement
    • iontophoresis
    • single or multiple active electrodes on target area to be stimulated
    • Usually larger dispervise(inavtive) electrode place on same side of body away from target area
  14. Bipolar electrode placement
    • 2 equal sized active electrodes place on same muscle group or in same treatment area
    • used for muscle weakness, neuromuscluar facilitaion, spasms, ROM, and pain
  15. Quadripolar electrode placement
    • electrodes from 2 separte stimulating circuits are positioned so taht the individula current intersect with eachotehr
    • 2 channels, 4 electrodes
  16. Electrode Arrangement
    • Parallel
    • Crossed
    • Bracketed
    • Linear
    • Unilateral
    • Bilateral
    • Contralateral
    • Proximal
    • Distal
Card Set
test two