Large Animal Ultrasonography Flashcards
(19 cards)
ultrasound
high frequenncy sound waves to priovide imaging and characterization of tssues
advantages of ultrasound
safe, cheaper, more readily available than radiographs, few contraindications, real-time
disadvantages of ultrasound
training needed, cannot see structures past bone or air, high frequencies increase heat
amplitude
sound wave strength
wavelength
area of compression
frequency
number of wave cycles per unit time
1 Hz (Hertz)
1 wave cycle per second
High Frequency Transducers
ex 7.5 MHz, higher resolution, lower penetration
Low Frequency Transducers
ex 2 MHz, lower resolution, deeper penetration
3 Types of Transducers
- Linear array
- Curved array
- Phase contrast
Types of Ultrasound (2)
A-mode = amplitude, B-mode = brightness
echogenicity
ability to bounce an echo
Uses of Ultrasound in Large Animal Repro
Lumpy ovary?
ovulation is occuring or just occured
Corpus Luteum
look at her
How soon can you detect pregnancy in a mare?
as early as 9 days postovulation, but typically 14-15 days
Why is it important to preg check a mare before 17 days?
beecause if there’s twins you are able to get rid of one before it attaches!
CTUP
combined thickness of uterus and placenta; indicator of high risk pregnancy
Fetal Sexing
dependent on genital tubercle placement
between hind limbs = male
closer to tail head = female (see attached)
