Large Animal Ultrasonography

Question 1

ultrasound

Answer 1

high frequenncy sound waves to priovide imaging and characterization of tssues

Question 2

advantages of ultrasound

Answer 2

safe, cheaper, more readily available than radiographs, few contraindications, real-time

Question 3

disadvantages of ultrasound

Answer 3

training needed, cannot see structures past bone or air, high frequencies increase heat

Question 4

amplitude

Answer 4

sound wave strength

Question 5

wavelength

Answer 5

area of compression

Question 6

frequency

Answer 6

number of wave cycles per unit time

Question 7

1 Hz (Hertz)

Answer 7

1 wave cycle per second

Question 8

High Frequency Transducers

Answer 8

ex 7.5 MHz, higher resolution, lower penetration

Question 9

Low Frequency Transducers

Answer 9

ex 2 MHz, lower resolution, deeper penetration

Question 10

3 Types of Transducers

Answer 10

1. Linear array
2. Curved array
3. Phase contrast

Question 11

Types of Ultrasound (2)

Answer 11

A-mode = amplitude, B-mode = brightness

Question 12

echogenicity

Answer 12

ability to bounce an echo

Question 13

Uses of Ultrasound in Large Animal Repro

Answer 13

Question 14

Lumpy ovary?

Answer 14

ovulation is occuring or just occured

Question 15

Corpus Luteum

Answer 15

look at her

Question 16

How soon can you detect pregnancy in a mare?

Answer 16

as early as 9 days postovulation, but typically 14-15 days

Question 17

Why is it important to preg check a mare before 17 days?

Answer 17

beecause if there’s twins you are able to get rid of one before it attaches!

Question 18

CTUP

Answer 18

combined thickness of uterus and placenta; indicator of high risk pregnancy

Question 19

Fetal Sexing

Answer 19

dependent on genital tubercle placement

between hind limbs = male
closer to tail head = female (see attached)