Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Physical Agents > Ultra Sound > Flashcards

Ultra Sound Flashcards

1
Q

What is sound?

A

Sound consists of waves that transmit energy by alternating compressing and rarefying material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

“Ultra” means what for Usound?

A
  • Usound can be greater then 20,000 Hz
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How is sound transmitted?

A

Through a medium that travels through a material

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the definition of frequency in sound waves?

A

The number of compression - rarefaction cycles per unit of time, expressed in cycles per second or Hz

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

At what frequency is therapeutic Usound used?

A

3 HHz million cycles per second

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What determines which frequency is used with therapeutic ultrasound?

A

It depends on the depth of tissue needed to pernetrate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Continuous Usound

A
  • Increases tissue temperature
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Pulsed Usound

A

Non-thermal effects

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Duty Cycle for Usound?

A

is the amount of on/off time

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Continuous Duty Cycle?

A

100%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Mot common duty cycle for pulsed Usound?

A

1/5 Ratio, 20%/80%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

In what measurement is the intensity of the Usound registered on the Usound unit?

A

W/cm^2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Cavitation

A

The formation, growth and pulsation of gas-filled bubbles caused by Usound

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Stable Cavitation

A
  • Bubbles oscillate in size throughout many cycles, but don’t burst
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Unstable Cavitation

A

Bubbles grow over a number of cycles and suddenly implode

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

ERA

A

Effective Radiating Area

17
Q

Contraindications of Usound

A
  • Malignant Tumor
  • Pregnancy
  • CNS Tissue
  • Joint Cement
  • Plastic Components
  • Pacemaker
  • Thrombophlebitis
  • Eyes
  • Reproductive Organs
  • Superficial Bone
18
Q

What is the purpose of thermal treatment of Usound?

A
  • Increase metabolic rate
  • Decrease pain
  • Decrease mm spasm
  • Alternation of nerve conduction velocity
  • Increase circulation
  • Increase soft tissue extensibility
19
Q

What should take place immediately after Usound?

A
  • Exercise
  • Stretching
  • STM
  • Use it or lose it
20
Q

How long should Usound be done?

A

5-10 minutes, 2x the size of the ERA

21
Q

If a pt reports pain with Usound what should you do?

A

Adjust parameters or stop treatment and check pt

22
Q

What can cause pain with Usound?

A
  • Intensity is too high or low
  • Holding Usound head in one spot
  • Not enough medium
  • Not keeping the Usound head flat
23
Q

Amount of Gel used?

A

Enough medium to eliminate air between area and sound head

24
Q

Movement of Usound head?

A

Over lap by 1/2 of ERA, circles, switchback, figure 8

25
Q

Rate of transducer movement?

A

4cm per second

26
Q

Position of Usound head?

A

keep flat and in constant parallel contact with the skin

27
Q

What is the most common size of transducer?

A

5cm head

28
Q

How do you determine what size of transducer to use?

A

1/2 of the ERA

29
Q

Watts

A

Total amount of energy used throughout the entire treatement

30
Q

W/cm^2

A

Refers to the total amount of vibrational energy being delivered per unit area

31
Q

What parameters does “dosage” incorporate?

A

Duty Cycle, Frequency, Intensity, Duration and sound head

32
Q

Deep Heat

A

1 MHZ @ 1.0-2.5 W/cm^2

33
Q

Pain Control

A

1.5 MHZ @ 2.0 W/cm^2

34
Q

How is the treatment time for Usound determined?

A

Goal of treatment and ERA

35
Q

What structures does Usound not effectively heat?

A

Fat

LOW ABSORPTION COEFFICIENTS

36
Q

What structures does Usound effect?

A
  • Tendons
  • Ligaments
  • Joint Capsules
  • MM Tissue
  • Fasia
    ALL ARE HIGH ABSORBTION COEFFICIENTS
37
Q

Low Intensity Pulse

A
  • Dermal Ulcers
  • Bone Growth
  • Phono
  • Acute Tendon and Ligament injuries
  • Surgical Sutures
38
Q

High Intensity Continuous

A
  • Pain control
  • Soft Tissue Shortening
  • Carpal Tunnel
  • Chronic Injuries

Physical Agents (14 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions