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Flashcards in Diathermy Deck (86)
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1

What does diathermy mean

Through Heat

2

What is diathermy

High frequency modality emitting electromagnetic energy

3

What are the type of diathermy (3)

1. Shortwave
2. Microwave
3. Longwave

4

What are the types of shortwave diathermy (2)

1. Continuous
2. Pulsed

5

Is longwave diathermy still used today

No

6

What is the most common frequency and wavelength of longwave diathermy

1 MHz, 300m

7

What is the most common frequency and wavelength of shortwave diathermy

27.12 MHz, 11m

8

What is the most common wave length of microwave diathermy

2450 MHz, 0.12m

9

Who regulates shortwave diathermy

FCC

10

What spectrum is shortwave diathermy in

Shortwave radio spectrum

11

What does shortwave diathermy mainly form

Magnetic fields in tissue

12

What does microwave diathermy mainly form

Electric fields in tissue

13

Why is microwave diathermy rarely used anymore (6)

1. Metal in vicinity
2. Skin burning
3. Overheating of superficial tissue
4. Increased reflection at tissue interfaces
5. Loss of energy to surrounding environment
6. Hot spots

14

Does shortwave diathermy use high or low frequency EMW to heat tissue

High frequency

15

What is shortwave diathermy in very basic terms

A radio transmitter

16

What are the available frequencies and wavelengths for shortwave diathermy (3)

1. 27.12 MHz, 11 m
2. 13.56 MHz, 22 m
3. 40.68 MHz, 7.5 m

17

Of the 3 available frequencies and wavelengths which one is rarely used

40.68 MHz, 7.5 m

18

The patient acts as what during shortwave diathermy

Radio receiver

19

True or False:
During shortwave diathermy the patient is "tuned in" as part of the circuit allowing for transfer of energy to the patient

True

20

When is current flow the greatest and example

In tissues with the least resistance like fat

21

When is the current absorption greatest and examples

In tissues with low impedance like muscle or blood

22

What was continuous shortwave diathermy used to treat in the 1930s

Infection

23

Is continuous shortwave diathermy used to treat infection today

It is used with caution due to rapid and vigorous heating of tissue

24

What is pulsed shortwave diathermy (PSWD) used for

Creating thermal and non-thermal effects

25

What does a wider pulse width mean

There is more energy generated to the tissue

26

What is pulse width measured in and the range

usec from 20-400

27

What happens when the pulse rate is greater

The amount of energy produce and transmitted into the tissue is greater

28

What is pulse rate measured in

Hz

29

What are the temperature sensations for PSWD (4)

1. Non thermal
2. Mild warmth
3. Moderate warmth
4. Vigorous heating

30

What are indications for non thermal PSWD (4)

Acute trauma, noticeable inflammation, edema reduction, and cell repolarization and repair