UTC Treatment Planning & Management 3 — Questions and Answers
Question 1: A 45-year-old patient requires ultrasound-guided drainage of a pelvic abscess. Which anatomical landmark is most important to identify to avoid injury during needle placement?
- The uterine fundus
- The iliac vessels (Correct answer)
- The bladder dome
- The sigmoid colon
Correct answer: The iliac vessels
The iliac vessels run adjacent to pelvic structures and must be identified and avoided during any pelvic interventional procedure to prevent vascular injury.
Question 2: Which quality assurance step should a sonographer perform before beginning an ultrasound-guided procedure to ensure accurate needle visualization?
- Warm the transducer to body temperature
- Test needle visualization using a phantom or water bath (Correct answer)
- Apply maximum focal zone depth
- Set the gain to maximum for optimal resolution
Correct answer: Test needle visualization using a phantom or water bath
Testing needle visualization in a phantom or water bath confirms proper beam alignment and needle echogenicity before patient use.
Question 3: A post-transplant kidney patient presents for routine surveillance ultrasound. Which finding requires urgent reporting to the transplant team?
- Mild cortical thinning
- Absent diastolic flow on Doppler interrogation of the renal artery (Correct answer)
- Echogenic renal pyramids
- A simple cortical cyst measuring 1.5 cm
Correct answer: Absent diastolic flow on Doppler interrogation of the renal artery
Absent or reversed diastolic flow in a transplant kidney indicates high resistance and may signal acute rejection or vascular compromise requiring urgent intervention.
Question 4: In managing a pediatric patient scheduled for an abdominal ultrasound, which preparation guideline differs most significantly from adult protocols?
- Shorter fasting periods adjusted by age and weight (Correct answer)
- Use of lower frequency transducers
- Avoidance of Doppler imaging
- Requirement for sedation in all cases
Correct answer: Shorter fasting periods adjusted by age and weight
Pediatric fasting guidelines are age- and weight-dependent because prolonged fasting poses greater risk of hypoglycemia in children.
Question 5: During ultrasound-guided amniocentesis, the sonographer's primary role is to:
- Perform the needle insertion under physician supervision
- Continuously monitor needle tip position and fetal heart rate (Correct answer)
- Document the amniotic fluid volume index only
- Operate the transducer remotely while the physician scans
Correct answer: Continuously monitor needle tip position and fetal heart rate
The sonographer provides real-time imaging guidance, continuously tracking the needle tip and monitoring fetal heart rate throughout the procedure.
Question 6: A patient with a known AAA is referred for a surveillance ultrasound. Which measurement change from the prior study would most likely trigger surgical referral?
- Growth of 0.2 cm over 12 months
- Growth of 0.5 cm or more over 6 months (Correct answer)
- Current diameter reaching 4.0 cm
- Mural thrombus detected for the first time
Correct answer: Growth of 0.5 cm or more over 6 months
Rapid growth of ≥0.5 cm in 6 months indicates accelerated expansion and increased rupture risk, typically prompting surgical evaluation regardless of absolute size.
Question 7: When performing a baseline ultrasound before initiating tamoxifen therapy, which finding is most important to document for future comparison?
- Ovarian volume bilaterally
- Endometrial thickness and echotexture (Correct answer)
- Uterine fibroid location
- Cervical length measurement
Correct answer: Endometrial thickness and echotexture
Tamoxifen is associated with endometrial changes including hyperplasia and carcinoma, so baseline endometrial thickness and echotexture must be documented.
UTC Treatment Planning & Management 3
A 45-year-old patient requires ultrasound-guided drainage of a pelvic abscess.
Which anatomical landmark is most important to identify to avoid injury during needle placement?