Emergency Medicine - Intro to Ultrasound Flashcards Preview

Surgery > Emergency Medicine - Intro to Ultrasound > Flashcards

Flashcards in Emergency Medicine - Intro to Ultrasound Deck (12):
0

effect of increased frequency

incr resolution, decr penetration

1

effect of incr wavelength

decr resolution, incr penetration

2

how do you make US image brighter

incr gain

3

where does probe point

to patients R or head

4

how does US determine depth of object

amt of time since Echo generated divided by 2 (bc distance = velocity*time)

5

what probe do you use for IV

linear - high F, max depth 6cm

6

what probe for abdomen

curvilinear, depth 26cm

7

colors flow dopler

RED towards, BLUE away

8

Impedance

Measure of materials tendency to transmit waves. Impacted by elasticity and density of material

9

Good and poor speculation reflectors

Good: fascial planes, diaphragm
Poor: lung and air filled bowel

10

Anisotropy

Echogenic when viewed at right angle to US beam, anechoic at other angles

11

Strong echos look? Absence of echos? Intermediate?

Bright. Black. Gray.