Registered Diagnostic Medical Sonographer (RDMS) — Ultrasound Technologist Certification — Questions and Answers

Question 1: A sonographer observes a patient with a pacemaker experiencing a sustained pulse rate drop to 20 bpm on the monitor. This suggests:

Normal pacemaker function at a lower programmed rate
Artifact from the ultrasound transducer
Patient is relaxed and in deep sleep
Pacemaker malfunction requiring immediate medical evaluation (Correct answer)

Correct answer: Pacemaker malfunction requiring immediate medical evaluation

A rate of 20 bpm in a pacemaker-dependent patient indicates potential pacemaker failure and requires immediate physician notification.

Question 2: What happens to the wavelength of an ultrasound wave when the frequency is increased while propagation speed remains constant?

Wavelength decreases proportionally (Correct answer)
Wavelength increases proportionally
Wavelength remains unchanged
Wavelength doubles

Correct answer: Wavelength decreases proportionally

Since wavelength = velocity/frequency (λ = v/f), increasing frequency while velocity remains constant in tissue causes wavelength to decrease proportionally.

Question 3: Which medication is the first-line treatment for anaphylaxis in a clinical setting?

Albuterol inhaler
Hydrocortisone
Diphenhydramine (Benadryl)
Epinephrine (adrenaline) (Correct answer)

Correct answer: Epinephrine (adrenaline)

Epinephrine is the only first-line treatment for anaphylaxis, acting to reverse bronchospasm, vasodilation, and urticaria rapidly.

Question 4: What is the foundation of professional ethics in Ultrasound Technologist Certification?

Following only verbal instructions
Maximizing profit at all costs
Avoiding difficult decisions
Acting with integrity, honesty, and accountability (Correct answer)

Correct answer: Acting with integrity, honesty, and accountability

Professional ethics are built on principles of integrity, honesty, and accountability, which guide practitioners in making responsible decisions.

Question 5: What is the primary purpose of conducting a safety audit in Ultrasound Technologist Certification practice?

To punish employees
To identify and mitigate potential hazards (Correct answer)
To reduce work hours
To eliminate all equipment

Correct answer: To identify and mitigate potential hazards

Safety audits systematically identify hazards and assess whether current safety measures are adequate to protect workers and the public.

Question 6: Which universal precaution is most critical when a patient is bleeding during an ultrasound-guided procedure?

Using standard precautions including gloves, mask, and eye protection (Correct answer)
Wearing sterile gloves only
Applying a tourniquet before scanning
Wearing a lead apron to protect from bloodborne pathogens

Correct answer: Using standard precautions including gloves, mask, and eye protection

Standard precautions require gloves, mask, and eye protection when exposure to blood or body fluids is possible.

Question 7: Time-gain compensation (TGC) controls are used to:

Adjust the depth of the focal zone
Compensate for sound attenuation at increasing tissue depths (Correct answer)
Change the pulse repetition frequency
Alter the transducer center frequency

Correct answer: Compensate for sound attenuation at increasing tissue depths

TGC selectively amplifies echoes returning from deeper tissues to compensate for progressive attenuation, producing a uniform image brightness with depth.

Question 8: Which nerve is at risk of injury in the carpal tunnel and is assessed during median nerve ultrasound?

Median nerve (Correct answer)
Ulnar nerve
Musculocutaneous nerve
Radial nerve

Correct answer: Median nerve

The median nerve travels through the carpal tunnel and is compressed in carpal tunnel syndrome; ultrasound can measure the nerve's cross-sectional area to support diagnosis.

Question 9: When should risk assessments be updated in Ultrasound Technologist Certification?

Only at the beginning of a project
Only after an incident happens
Once per year at annual review
Regularly and whenever significant changes occur (Correct answer)

Correct answer: Regularly and whenever significant changes occur

Risk assessments should be living documents, updated regularly and whenever there are significant changes in conditions, processes, or scope.

Question 10: Which tool is commonly used for root cause analysis in Ultrasound Technologist Certification?

Profit and loss statement
Fishbone (Ishikawa) diagram (Correct answer)
Gantt chart
Organizational chart

Correct answer: Fishbone (Ishikawa) diagram

The fishbone diagram helps identify potential causes of a problem by organizing them into categories, revealing root causes.

Question 11: A patient undergoing a transesophageal echocardiogram (TEE) has the probe in place when they begin vomiting. The sonographer should:

Remove the probe, position the patient on their side, and call for assistance (Correct answer)
Suction the oropharynx while keeping the probe in position
Continue imaging quickly to complete the study
Advance the probe further to protect the airway

Correct answer: Remove the probe, position the patient on their side, and call for assistance

Active vomiting with an esophageal probe in place risks aspiration; the probe must be removed and the patient turned to lateral position immediately.

Question 12: Which type of documentation error could result in a patient receiving a repeat unnecessary ultrasound exam?

Not documenting prior imaging studies available for comparison (Correct answer)
Omitting the sonographer's lunch break time
Leaving the equipment model number off the report
Failing to record the patient's preferred name

Correct answer: Not documenting prior imaging studies available for comparison

Failing to document or communicate that prior comparison studies exist may lead the interpreting physician to order repeat imaging unnecessarily.

Question 13: A phased array transducer is most commonly used for which clinical application?

Breast mass characterization
Cardiac (echocardiographic) imaging through narrow intercostal windows (Correct answer)
Peripheral vascular imaging of leg veins
Musculoskeletal imaging of superficial tendons

Correct answer: Cardiac (echocardiographic) imaging through narrow intercostal windows

Phased array transducers steer the beam electronically through a small footprint, allowing cardiac imaging through the narrow intercostal spaces between the ribs.

Question 14: When documenting a patient refusal of an ultrasound exam, the sonographer should record:

Only that the patient was uncooperative
Nothing, as incomplete exams are not billable
The patient's stated reason, that informed refusal was obtained, and notification of the ordering provider (Correct answer)
The technical factors that would have been used

Correct answer: The patient's stated reason, that informed refusal was obtained, and notification of the ordering provider

Proper documentation of refusal includes the patient's reason, confirmation that risks were explained, and notification of the referring provider to ensure continuity of care.

Question 15: During a renal ultrasound, the sonographer measures the right kidney at 13.5 cm in length. What is the clinical significance of this finding in an adult?

Possible renal hypertrophy or compensatory enlargement (Correct answer)
Indicative of renal artery stenosis
Normal finding; adult kidneys range 10–12 cm
Normal finding; adult kidneys range 13–15 cm

Correct answer: Possible renal hypertrophy or compensatory enlargement

Normal adult kidney length is approximately 9–12 cm; a length of 13.5 cm suggests possible hypertrophy, often compensatory when the contralateral kidney is absent or non-functional.

Question 16: What is the primary purpose of time-gain compensation (TGC) in clinical ultrasound scanning and QA evaluation?

To reduce aliasing in pulsed Doppler mode
To increase frame rate at greater depths
To narrow the beam width at the focal zone
To compensate for signal attenuation with increasing depth so echoes appear uniform (Correct answer)

Correct answer: To compensate for signal attenuation with increasing depth so echoes appear uniform

TGC applies increasing amplification with depth to compensate for signal attenuation, producing a uniform appearance of similar structures throughout the image.

Question 17: What is the minimum soak time for high-level disinfection of transvaginal probes using glutaraldehyde per most manufacturer guidelines?

5 minutes
10 minutes
45 minutes (Correct answer)
20 minutes

Correct answer: 45 minutes

High-level disinfection with 2% glutaraldehyde typically requires a minimum of 45 minutes of immersion to eliminate all microorganisms except bacterial spores.

Question 18: The suffix '-ectomy' in medical terminology means:

Abnormal condition of
Incision into
Visual examination of
Surgical removal of (Correct answer)

Correct answer: Surgical removal of

The suffix '-ectomy' means surgical removal or excision, as in cholecystectomy (removal of the gallbladder).

Question 19: In ultrasound terminology, 'posterior acoustic enhancement' is typically seen posterior to:

Bone cortex
Dense calcifications
Gas-containing bowel
Fluid-filled cystic structures (Correct answer)

Correct answer: Fluid-filled cystic structures

Posterior acoustic enhancement occurs behind fluid-filled cysts because fluid transmits sound with little attenuation, resulting in increased brightness behind the structure.

Question 20: Which cell type in the pancreas produces glucagon?

Acinar cells
Beta cells
Alpha cells (Correct answer)
Delta cells

Correct answer: Alpha cells

Alpha cells in the islets of Langerhans secrete glucagon, which raises blood glucose by stimulating hepatic glycogenolysis and gluconeogenesis.

Question 21: During ultrasound-guided amniocentesis, the sonographer's primary role is to:

Continuously monitor needle tip position and fetal heart rate (Correct answer)
Perform the needle insertion under physician supervision
Operate the transducer remotely while the physician scans
Document the amniotic fluid volume index only

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 22: On ultrasound, the Murphy sign is elicited by:

Applying transducer pressure directly over the gallbladder and asking the patient to inspire (Correct answer)
Tapping the costovertebral angle to assess kidney tenderness
Compressing the aorta to assess pulsatility
Pressing on the right iliac fossa during deep inspiration

Correct answer: Applying transducer pressure directly over the gallbladder and asking the patient to inspire

The sonographic Murphy sign is positive when maximum tenderness occurs precisely at the transducer location over the gallbladder during deep inspiration, highly specific for acute cholecystitis.

Question 23: Harmonic imaging improves image quality primarily by:

Widening the transducer beam at depth
Using frequencies generated within tissue rather than emitted frequencies (Correct answer)
Amplifying near-field gain
Increasing pulse repetition frequency

Correct answer: Using frequencies generated within tissue rather than emitted frequencies

Tissue harmonic imaging detects the second harmonic frequency generated by nonlinear propagation within tissue, reducing near-field clutter and side-lobe artifacts.

Question 24: A pregnant patient at 28 weeks gestation presents for a growth ultrasound with a fetal heart rate of 95 bpm measured on the monitor. What is the appropriate response?

Continue the exam and note the FHR in the report
Reschedule the exam for the next day
Reassure the patient and proceed without documentation
Document and immediately notify the supervising physician of possible fetal bradycardia (Correct answer)

Correct answer: Document and immediately notify the supervising physician of possible fetal bradycardia

Normal fetal heart rate is 110–160 bpm; a rate of 95 bpm constitutes bradycardia and requires immediate physician notification.

Question 25: Which of the following is the correct sequence for using an AED on a patient in cardiac arrest?

Power on, attach pads, analyze rhythm, deliver shock if advised (Correct answer)
Power on, deliver shock, attach pads, analyze rhythm
Deliver shock, attach pads, power on, analyze rhythm
Attach pads, power on, deliver shock, analyze rhythm

Correct answer: Power on, attach pads, analyze rhythm, deliver shock if advised

AED use follows the sequence: power on, attach pads to the patient, allow rhythm analysis, then deliver a shock if indicated.

Question 26: During a real-time ultrasound exam, 'frame rate' refers to:

The number of complete images displayed per second (Correct answer)
The pulse repetition frequency of the transducer
The number of pulses emitted per second
The number of scan lines per image

Correct answer: The number of complete images displayed per second

Frame rate is the number of complete B-mode images refreshed per second, and it is inversely related to depth and the number of focal zones.

Question 27: Which Doppler technique allows simultaneous 2D imaging and pulsed Doppler sampling from a specific depth?

Continuous-wave Doppler
Power Doppler
Color flow Doppler
Duplex Doppler (Correct answer)

Correct answer: Duplex Doppler

Duplex Doppler combines real-time B-mode imaging with pulsed-wave Doppler, allowing precise placement of the sample gate at a specific anatomical location.

Question 28: A 32-week gravida presents with suspected placenta previa. Which scanning approach should be used to confirm the diagnosis without dislodging a low-lying placenta?

Transvaginal scanning with a fully empty bladder
Color Doppler of the lower uterine segment only
Translabial (transperineal) ultrasound (Correct answer)
Transabdominal scanning with a full maternal bladder

Correct answer: Translabial (transperineal) ultrasound

Translabial ultrasound provides a safe view of the placental edge and internal os without instrumentation of the vagina, reducing hemorrhage risk.

Question 29: A patient with suspected deep vein thrombosis (DVT) has a negative initial lower extremity Doppler study. Based on high clinical probability, the physician requests a repeat study in 5–7 days. This strategy is employed because:

Clot propagation from calf to proximal veins may not be detectable initially (Correct answer)
Early thrombus may be too fresh to be non-compressible on initial examination
Doppler machines require calibration between examinations
DVT can spontaneously resolve within 24 hours and reoccur

Correct answer: Clot propagation from calf to proximal veins may not be detectable initially

Calf thrombi are often below the sensitivity threshold for DVT protocols, and proximal propagation detectable on repeat scan justifies serial imaging in high-probability patients.

Question 30: Which control on the ultrasound machine compresses the gray-scale range displayed and can help differentiate subtle tissue echogenicities?

Depth control
Dynamic range (compression) control (Correct answer)
Pulse repetition frequency
Time-gain compensation slider

Correct answer: Dynamic range (compression) control

Reducing the dynamic range (increasing compression) narrows the displayed gray-scale, making subtle echo differences more visually apparent.

Registered Diagnostic Medical Sonographer (RDMS) — Ultrasound Technologist Certification

The ARDMS Ultrasound Technologist Certification validates competency in diagnostic medical sonography, covering imaging principles, equipment operation, clinical procedures, patient care, and quality assurance across all ultrasound specialties.

Questions

35 min

Time Limit

70%

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