Unit 2 Flashcards
How large of an area do you treat with ultrasound?
Slightly larger than the diameter than the sound head (approx 4x larger)
Output frequency for deeper ultrasound?
1 mHz
When using ultrasound, what depth of tissue will 3mHz output frequency effectively treat?
1-3 cm depth
Ultrasound can only increase the tissue temperatures when the treatment is approximately:
2-3 times the area of the sound head
Which of the following will not trigger the ultrasound to shut down automatically?
Too much coupling gel
Coupling mechanisms that are best suited for irregular body parts:
Bladder and Immersion
Which coupling method would transmit the most energy, causing more heating?
Direct coupling
What water is ideal when using immersion technique?
Degassed water
What parameter is primarily responsible for determining if a treatment will be thermal or non-thermal?
Duty cycle
Which of the following represents a good setup for an acute injury?
20% duty cycle, with 0.5 W/cm^2
Trying to generate heat with a 3mHz output?
3-4 min
When applying underwater ultrasound, how far should the sound head be from the body?
1 inch
Common mistake made by therapists in tissue heating using ultrasound?
Applying to too large of a treatment area
What is the optimal coupling medium?
Ultrasound gel
In general, ultrasound is most effective in treating
Painful…
Which of the following conditions would therapeutic ultrasound be applicable
Pregnancy using it over the carpal tunnel
Output intensity is determined by:
The amount of heat generation desired
If non-distilled water is being used:
Increase the intensity by 0.5 W/cm^2
Which of the following presentations would indicate the used of therapeutic ultrasound?
Neuroma, muscle spasm and bursitis
The pisoelectric crystals will
Expand and contract when current passes through
Ultrasound waves easily pass through
Adipose tissue
What medium would be most applicable over the distal clavicle?
Gel pad
The first step in preparing a patient to us therapeutic ultrasound is
Establish that there are no contraindications present
What is the optimal intensity to achieve heating using ultrasound
There is no specific or optimal intensity because the intensity must be adjusted to meet the needs of the specific patient and the characteristics of the specific ultrasound device
