Ex2

Question 1

Ultrasound uses what kind of energy?

Answer 1

Acoustical

Question 2

What is the most common DEEP heating modality used by 63% of all chiropractors ?

Answer 2

Ultrasound

Question 3

What is the the 2nd most common heating modality used ?

Answer 3

Ultrasound

Question 4

What is the most Common heating modality used by 71% of chiropractors ?

Answer 4

Moist hot pack

Question 5

What is the range of hz in ultrasound ?

Answer 5

.8-3.3 MHz

Question 6

What duty cycles are commonly used for pulsed ultrasound?

Answer 6

50% and 20%

Question 7

What kind of ultra sound is used for tissue healing ?

Answer 7

Continuous

Question 8

What kind of ultrasound has a non thermal effect but has mechanical effects?

Answer 8

Pulsed ultrasound

Question 9

What effect is described as a mechanical deformation of a crystal that causes an electrolyte current to form?

Answer 9

Piezoelectric effect

Question 10

What effect is an alternating current is passsed through a crystal rustling in very fast contraction and expansion of the crystal?

Answer 10

Reverse piezoelectric (indirect) effect

Question 11

What is needed for a reverse piezoelectric effect?

Answer 11

High voltage cables that are well insulated

Question 12

What is associated with near field ultrasound beams?

Answer 12

Treatment area, fresnel zone

Question 13

What ultrasound beam is associated with far field ?

Answer 13

Fraunhofer zone

Question 14

What type of ultrasound is used as stimulation of Fracture healing ?

Answer 14

Low intensity pulsed US (LIPUS)

Question 15

What type of US propels sterile saline across the wound which is used to clean and Debrid wounds?

Answer 15

Noncontact low frequency ultrasound (NCLFUS)

Question 16

What does ERA stand for?

Answer 16

Effective radiating area

Question 17

What does BNR stand for?

Answer 17

Beam nonuniformity ratio

Question 18

What is the size of the ERA?

Answer 18

Always smaller than the size of the ultrasound head (ideally only slightly smaller)

Question 19

What is the area of the sound head that prides sound energy/?

Answer 19

Effective radiating area? (ERA)

Question 20

Are ultrasound beams uniform across the US head?

Answer 20

No

Question 21

What measures the amount of variability of the beam?

Answer 21

Bean nonuniformity ratio (BNR)

Question 22

How do you figure out the BNR?

Answer 22

Ratio between the peak intensity of the ultrasound beam divide by the average intensity of the ultrasound

Question 23

What is used to compare quality of different US machines?

Answer 23

BNR (beam nonuniformity ratio)

Question 24

What is the ideal BNR?

Answer 24

1:1

Question 25

What, although not ideal is the range for BNR?

Answer 25

2:1-8-1

Question 26

The______the BNR the more uniform the intensity of the sound wave?

Answer 26

Lower