ultrasound Flashcards
(8 cards)
1
Q
what are the effects if ultrasound is set at 1 MHz output
A
- Penetrates 3 to 5 cm
- Thermal effects last longer
- More divergent beam
2
Q
what are the effects if ultrasound is set at 3 MHz output
A
- Penetrates 2 to 3 cm
- Heats 3 times faster than 1 MHz output
- More collimated beam
3
Q
what are the effects of heating tissue at different temps
A
look at picture in phone
4
Q
It takes 4-5mins to heat the tissue by 4C using what frequency and intensity?
A
3MHz frequency and 1.5 W/cm intensity
5
Q
It takes 10 mins to heat the tissue by 4C using what frequency and intensity?
A
1 MHz frequency and 2 W/cm intensity
6
Q
what are the thermal effects of US
A
Decreased joint stiffness
- Reduced muscle spasm
- Diminished pain perception
- Increased metabolism
- Increased blood flow
7
Q
what are the contrainidcations of US
A
- Around the eyes, heart, skull, or genitals
- Over the thorax in the presence of an implanted pacemaker
- Pregnancy when used over the pelvic or lumbar areas
- Over a fracture site before healing is complete
- Stress fracture sites or sites of osteoporosis
- Over the pelvic or lumbar area in menstruating female patients
8
Q
what should you do prior to treatment
A
Clean skin
