Case Analysis & Practical Application Flashcards

A laboratory consultant is assessing the impact of implementing total laboratory automation (TLA) in a high-volume core laboratory. Which outcome metric should be established BEFORE implementation to measure return on investment?

Answer: Baseline TAT, error rate, FTE count, and cost per reportable result

Pre-implementation baseline metrics for TAT, errors, staffing, and cost are essential to objectively quantify post-implementation improvements and calculate ROI.

A consultant is called in after a root cause analysis (RCA) reveals a patient received a transfusion of ABO-incompatible blood due to a patient ID wristband error at the time of specimen collection. Which system-level recommendation addresses the root cause?

Answer: Implement a two-identifier barcode scanning verification system at the bedside prior to specimen collection

Barcode-based bedside patient ID verification is a system-level intervention that prevents misidentification at the point of collection, addressing the root cause rather than individual blame.

A laboratory consultant reviewing coagulation testing discovers that PT/INR samples are routinely collected in non-standard fill volumes and transported at room temperature for up to 4 hours before testing. Which pre-analytical variable is most likely compromising result accuracy?

Answer: Underfilling the citrate tube, altering the blood-to-anticoagulant ratio and falsely prolonging PT/INR

Underfilled sodium citrate tubes alter the fixed anticoagulant-to-blood ratio, causing falsely prolonged PT/INR results that can lead to incorrect anticoagulation management.

A consultant evaluating a cytology laboratory finds that the laboratory's slide positivity rate for cervical cytology is 0.4%, far below the national CAP benchmark of 3–10%. What is the most appropriate next step?

Answer: Conduct a 10% random rescreening audit and evaluate whether a sampling or interpretation bias exists

A positivity rate far below benchmark suggests under-calling of abnormal slides; a rescreening audit evaluates whether interpretive or sampling errors are responsible.

A community hospital laboratory consultant is evaluating whether to implement next-generation sequencing (NGS) for oncology testing in-house. The projected annual volume is 90 cases. Which factor most strongly argues against in-house implementation?

Answer: Lack of a dedicated bioinformatics pipeline and sufficient volume to amortize capital and labor costs

NGS requires substantial capital investment in equipment and bioinformatics infrastructure; at 90 cases per year, the cost per case typically makes reference lab send-out more economical.

During an assessment of a laboratory's reagent inventory management, a consultant finds $340,000 in expired reagents written off in the prior fiscal year. Which root cause is MOST likely driving this loss?

Answer: Overstocking driven by volume-based purchasing discounts without regard to actual consumption rates

Purchasing large volumes to capture discounts without matching actual consumption rates is the most common driver of reagent expiration waste in laboratory operations.

A laboratory consultant is asked to advise on the laboratory's response after discovering a systematic data entry error caused 63 patient lipid panel results to be reported with LDL values 30% lower than the true result over a two-week period. What is the appropriate corrective disclosure pathway?

Answer: Notify the laboratory director and compliance officer, identify all affected patients and ordering providers, issue corrected reports, and document the event per the facility's adverse event policy

Systematic result errors require comprehensive identification of all affected patients and providers, corrected report issuance, and formal adverse event documentation per institutional policy.