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Ortho Final Exam Prep > Questions 7 > Flashcards

Questions 7 Flashcards

1
Q

What type of energy is therapeutic ultrasound?

A

acoustic waves

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2
Q

Which of the following tissues attenuates (absorbs) ultrasound energy the fastist?

A

Tendon

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3
Q

In ultrasound, what is meant by the Duty Cycle?

A

Pulse duration/pulse period (ultrasound is on)

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4
Q

What is the recommended treatment coverage area when applying ultrasound?

A

2 times the ERA

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5
Q

How long does vigorous heating (greater than 4 deg C) last after cessation of US?

A

About 5 mins

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6
Q

Frequency in ultrasound refers to?

A

The number of sound waves per second

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7
Q

Why must you keep the sound head moving when using ultrasound?

A

To avoid overheating areas and the creation of standing waves

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8
Q

What is the formula for spatial average, temporal average (SATA) intensity?

A

(Power/ERA) x Duty Cycle

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9
Q

What is the formula for saptial average intensity?

A

Power/ERA

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10
Q

What does ERA stand for in ultrasound?

A

Effecting Radiating Area

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Ortho Final Exam Prep (12 decks)

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