Diathermy

Question 1

diathermy

Answer 1

heat all the way thru a tissue (diameter)

E-field and B-field

Question 2

Electric Field

Answer 2

forces of attraction between opposite charged particles
sides flip + to - 27 mill x/sec
friction of ion particles creates heat
water filled areas heat up more quickly

Question 3

diples

Answer 3

dipoles will SPIN because they have a + end and a - end

moving ions to reestablish the concentration gradient

Question 4

E-field =

Answer 4

Capacitive

2 plates/pads on either side of area and thus creates an electric field for the ions to move

Question 5

Magnetic Field

Answer 5

moving E => B (and vice versa)
penetrates the body 5 cm and induces eddy currents
cause charged particles to spin and can restart Na/K pump

Question 6

B field =

Answer 6

Inductive
energy thru coil to create a magnetic field and thus eddy currents
can have one plate or coil that wraps around extremity

Question 7

selective heating of diathermy

Answer 7

needs H2O and thus fat will not heat - yay works in out favor

Question 8

Continuous Diathermy

Answer 8

continuous current is applied to the applicator
thermal effects
AC (alt current) - alternated creating the eddy current

Question 9

Pulsed Diathermy

Answer 9

pulses of current are applied to the applicator

less heat generated, non thermal effects

Question 10

Biophysical Effects

Answer 10

Electric field 
ion oscillation, dipole rotation, e- cloud motion
Materials
more action in high water materials
Magnetic fields
eddy currents, fat - wont heat up

Question 11

Thermal Effects (continuous)

Answer 11

VD
tissue extensibility inc
pain relief

Question 12

Nonthermal effects

Answer 12

cellular level
repolarize damaged cells (remix ions)
Na/K pumo
fibroblasts (eat Ca and spew collagen)
nerve regeneration

Question 13

Application/ Pros

Answer 13

can treat large area

1 layer of towel is enough but MANDATORY bc sweat will create a burn and need to keep it absorbed

Question 14

Cons

Answer 14

stray electric field
if stand too close PT/family can feel warmpth esp if wearing metal
enough to light up a florescent light bulb in in area of machine

Question 15

Indications

Answer 15

Chronic - continuous
pain spasm, jt stiffness, reflex heating, pelvic infla disease
Sub-scute or acute - pulsed
any
BIG areas that need to be heated up esp deeper

Question 16

Contraindications

Answer 16

METALLLLL****
pacemaker
cancer
pregnancy
synthetic/charged materials (silk)