Iontophoresis Flashcards
T/F: Ionization is the movement of ions in solution.
False
T/F: The dispersive electrode contains the ions.
False
T/F: pH reactions of greater than 5 are alkaline.
True
Which type of current does iontophoresis produce? A. biphasic B. continuous monophasic C. polyphasic D. pulsatile
B
What is the recommended range for iontophoresis current amplitude? A. 3-5 mA B. 5-10 mA C. 50-100 mA D. 100-150 mA
A
Chemical burn is often associated with iontophoresis and may be attributed to: A. allergic reaction B. poor electrode contact C. the medication D. continuous direct current
D
Which of the following is not an ion used to treat inflammation? A. hydrocortisone B. salicylate C. lidocaine D. dexamethasone
C
Skin impedance usually decreases during treatment. \_\_\_\_\_\_ should be decreased to avoid pain and burning. A. current intensity B. electrode size C. treatment time D. ion dosage
A
What problem do areas of thick fat and skin present? A. decreased ion absorption B. increased ion absorption C. decreased resistance D. increased resistance
D
Which of the following is a contraindication for iontophoresis? A. inflammation B. analgesia C. asthma D. muscle spasm
C
Phonophoresis vs Iontophoresis
Phono involves the use of acoustic energy in the form of US to drive whole molecules across the skin into the tissues. Ionto uses electrical current to transport ions into the tissues.
Delivery of Iontophoresis
Done at a constant rate. Can be spiked or sustained. To drive the medication in less time, you can increase the intensity. Sustained helps in the reduction of allergies/burns
Rate of delivery depends upon…
concentration of ion, pH of solution, molecular size of solute, current density, duration of treatment
The electrode that has the greatest concentration of electrons is _______.
negatively charged (the negative electrode or cathode)
Negative electrode creates a ______ reaction.
acidic
Positive electrode creates a ______ reaction.
alkaline (most likely to produce tissue damage)
Force that acts to move ions through the tissues is determined by…
- strength of electrical field (current density_
- electrical impedance of tissues to current flow
________ determines ion migration.
Current density
Current density is altered by…
- size of electrode
- increasing/decreasing current density
Treatment depth
no more than 1.5 cm over a 12-24 hour period, 1-3 mm during average 15 minute treatment
Quantity of ions transferred into tissues is determined by…
intensity of current, current density at active electrode, duration of current flow, concentration of ions in solution
Ion transfer can be increased by…
increasing intensity and duration of treatment
What does iontophoresis do?
Involves the administration of ionic therapeutic agent through the skin by application of low level electrical current
Most effective dosage
40 mA-minutes
