Iontophoresis Past Paper PDF

- 1- electrode polarity in iontophoresis is chosen depending on A) Current density B) Skin impedance C) medication used 2- to avoid chemical burn A) increase the size of the anode relative to the cathode B) increase the size of the cathode relative to the anode C) increasing the spacing between th...

- 1- electrode polarity in iontophoresis is chosen depending on A) Current density B) Skin impedance C) medication used 2- to avoid chemical burn A) increase the size of the anode relative to the cathode B) increase the size of the cathode relative to the anode C) increasing the spacing between the electrodes D) B and C 3- iontophoresis is A) alternating B) direct C) pulsed 4- used to deliver chemicals to various biologic tissues A) iontophoresis ( for ions) B) phonophoresis ( for molecules) C) both 5- rate of ion delivery is determined by A) the duration of the treatment B) the PH of the solution C) Molecular size of the solute D) all the above 6- which of the following is true about iontophoresis A) across the skin at a constant rate B) alternating current C) have effective level for an short period of time 7- the active electrode is A) smaller in size and have lower current density B) smaller in size and have higher current density C) higher in size and have lower current density 8- Increasing the size of the electrode will A) decrease current density under that electrode B) increase current density under that electrode C) not make changes in density 9- all of the following is contraindication of iontophoresis except A) Cardiac and respiratory disorders B) Skin sensitivity C) scar tissue D) Over carotid sinus 10- the intensity of iontophoresis A) 10 mA B) 5 mA C) 100 mA 11- Negative ions accumulating at the anode produce an alkaline reaction 12- The majority of the ions used for iontophoresis are positively charged 13- sodium hydroxide producing softening of the tissues by decreasing protein density 14- some positive ions can also produce an analgesic effect 15- negative ions is useful in treating scars or adhesions 16- Chemical burn is due to accumulation of sodium hydroxide 17- The cathode should be twice the size of the positive charge 18- Current density may be altered by increasing or decreasing current intensity or by changing the size of the electrode ⸻⸻—-⸻⸻—-⸻⸻—-⸻⸻—- 1- c 2- d 2- d 3- b 4- c 5- d 6- a 7- b 8- a 9- c 10- b 11- f 12- t 13- t 14- f 15- f 16- t 17- t 18- t