PTA Question of the Week - Duty cycle

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You have been applying pulsed wave ultrasound to a patient's anterior thigh at 1.4 W/cm2 for six minutes that used a 2 msec on time and 8 msec off time for one pulse wave. Which of the following would be the correct duty cycle to document?

1. 10 percent
2. 15 percent
3. 20 percent
4. 25 percent

The solution will be posted in a few days

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