Quality Assurance and Safety Flashcards

A vascular lab implements a protocol requiring dual verification of all lower extremity bypass graft surveillance reports. This is an example of which patient safety concept?

Answer: Redundancy / independent double-check

Independent double-check (redundancy) adds a second verification step to catch errors before they reach the patient, a core patient safety strategy in high-reliability organizations.

When calibrating a segmental pressure cuff system, the technologist should verify that cuffs maintain pressure within what acceptable tolerance?

Answer: ±5 mmHg

A ±5 mmHg tolerance is the accepted standard for pneumatic cuff calibration in vascular laboratories, ensuring accurate segmental pressure gradients are reported.

Under the principle of universal precautions, how should vascular laboratory staff treat ALL patient blood and body fluids?

Answer: As potentially infectious regardless of the patient's known diagnosis

Universal precautions mandate treating every patient's blood and body fluids as potentially infectious to protect staff from undiagnosed or unreported bloodborne pathogens.

Which document should a vascular laboratory maintain to demonstrate that technologists have reviewed and understood updated scanning protocols?

Answer: Competency sign-off sheets or training attestation records

Signed competency attestation records provide documented evidence that staff have been trained on and understand current protocols, a key ICAVL and Joint Commission requirement.

A false-negative rate of 12% is found during a QA audit of carotid duplex studies compared to angiography. Which action is MOST appropriate?

Answer: Conduct a root cause analysis to identify systematic scanning or interpretation errors

A root cause analysis identifies whether the false negatives stem from protocol deviations, equipment issues, or interpretation criteria, enabling targeted corrective actions.

Which electrical safety precaution is MOST important when operating ultrasound equipment near a patient with a temporary transvenous pacemaker?

Answer: Ensure the equipment is properly grounded and inspect for current leakage

Patients with temporary pacing leads have a direct electrical path to the myocardium; even small leakage currents from improperly grounded equipment can induce ventricular fibrillation.

In the context of vascular laboratory QA, what is the purpose of a 'correlation study'?

Answer: To compare the lab's duplex findings with those from another imaging modality to validate diagnostic accuracy

A correlation study compares duplex ultrasound findings to a reference standard such as CTA, MRA, or angiography to verify the lab's diagnostic thresholds are clinically valid.