Modalities Ch. 15 Flashcards Preview

Modalities > Modalities Ch. 15 > Flashcards

Flashcards in Modalities Ch. 15 Deck (28)
Loading flashcards...
1

radiation

propagated through empty space as EM waves
includes heat, light, electricity, x-rays

2

forms

all are caused by minute particles moving through space

3

wavelength

distance of one repetition of the wave, crest to crest

4

frequency

rate at which the wavelengths are moving, cycles/sec
Hz and Mhz

5

wavelength and frequency relationship

speed = wavelength x freq.
all travel at 186,000 mi/sec
-linear velocity = 186,000 mi/sec
linear speed remains constant

6

diathermy

"through heat"
a therapeutic modality that uses high frequency EM waves to heat deeper tissue
involves transmissions and absorption of EM by the body

7

why is it not used?

expense of 5,000 to 25,000
poor information
-speculation
lack of research
-changes in equipment

8

diathermy classification

medical
surgical

9

classification based on frequency

longwave
shortwave
microwave

10

longwave

2 MHz
oldest method
not used any more

11

shortwave

27.12 MHz
wave identical to a shortwave radio
most common type used in sports medicine

12

microwave

2450 MHz
similar to radar
seldom used in the US
more contraindications than SWD

13

drum electrode

most common type
drum electrode is made up of copper foil

14

SWD device

runs on 110 V electricity from a wall outlet
frequency is 27.12 MHz
radio frequency that passes through the drum to the coil
coil sends wave into the tissue
one applicator unit is called a monode
two applicator is a diplode
inside applicator is single copper electrode coil

15

dipole

ends carry opposite energy charges
as they rotate, friction is occurring causing heat
rotation + friction = heat

16

eddy currents

a magnetic field generates small circular electrical fields
fields vibrate and increase cell membrane permeability, which causes heat

17

heating effects

created by resistance in the tissue to things going on
resistance is highest in muscle
SWD can heat muscle without overheating skin or adipose tissue
muscle is a denser tissue, more resistance, more heat

18

types

SWD can either be continuous or pulse waved

19

most treatments are...

pulsed

20

why use pulse?

on time, offtime, peak power stops tissue from overheating

21

peak power

pulse width with pulse frequency
-both important variables

22

how to create more heat

increase frequency and pulse width

23

PG 289

average watts is power

24

physiological effects of diathermy

increase blood flow
increase metabolism
more effect at cellular level
fibroblastic activity
collagen deposition
new capillary growth
white blood cell infiltration
healing
decreased pain and muscle spasm

25

diathermy indications

strains
sprains
contusions
tendonosis
bursitis
pain
joint stiffness
osteoarthritis
decreased ROM
increase extensibility of collagen fibers

26

diathermy contraindications

when tissue temperature rise is not indicated
ischemic areas
anesthetic areas
effusion
eyes, testes, ovaries
caution over pelvis during pregnancy
moist wound dressings
fever
epiphysis
cancer
pacemakers
metal implants

27

US

can heat tissues 3-5 cm deep to > 40 degrees C
heats small areas
short stretch/thermal window
5-10 min.

28

SWD

can heat tissues 3-5 cm deep to > 40 C
heats large areas
long stretch/thermal window
10-15 min
consistent treatment over a certain area