Chapter 10 Flashcards
Malignant tumors, benign tumors and inflammatory conditions are not related to:
Hypoxia
Select the true statement regarding ACR practice guidelines for an ultrasound examination of the female pelvis:
Use the lowest possible sonographic exposure settings to gain the necessary diagnostic information.
Choose the most appropriate transducer frequency for a transabdominal pelvic sonogram when more depth penetration is needed.
2.5 MHz
A full urinary bladder enhances uterine visualization, but frequently causes a suboptimal ______ Doppler exam owing to the angle of incidence.
Uterine artery
If a cystic mass is suspected during a full bladder pelvic ultrasound examination, the patient should:
Void the urinary bladder and further investigate the pelvis
Which position provides the best visualization of free fluid in the pouch of Douglas during an endovaginal ultrasound examination?
Lithotomy with a slight reverse Trendelenburg
Quantitative measurements of Doppler studies include:
Measurements of estimating absolute blood velocities, assessment of vascular impedances, and quantifying flow disturbances
With constant perfusion pressure, the flow ____ as the impedance to flow ___.
Increases, decreases
Resistive Index (RI) calculates:
The peak systolic velocity to the end diastolic velocity
Suspicion for vascular occlusion occurs when a :
High resistance pattern is detected where low resistance is normally seen
A correct angle of _____ is required when analyzing vascular flow to determine its velocity by a Doppler shift.
Less than 60 degrees
Normal arterial flow is seen as:
Alternating quick uptake systolic peak followed by a lower diastolic flow
What is laminar flow?
Blood velocity traveling highest in the mid vessel
Name the vessel (appearing as a tubular structure) often seen sonographically in the outer uterine myometrium.
Arcuate artery
The functional layer of the endometriums blood supply is by the:
Radial and spiral arteries