Abstract
Abstract Context.—Physicians frequently request that additional tests be performed on an existing specimen (add-ons). In our institution, add-ons comprise approximately 1% of the specimen volume and require a disproportionate number of employees. Not only are add-on tests time-consuming and expensive, but storing routine specimens for 7 days in anticipation of add-ons consumes valuable laboratory space. Design.—One hundred sixty add-on tests during a 1-week period were reviewed. Objectives.—To analyze the pattern of add-on testing and determine methods to improve laboratory operations. Results.—All add-on tests were ordered within 24 hours of receipt of the original specimen, even though specimens were retained for 7 days. At our institution, 1.5 full-time equivalents are required to complete add-on testing, which accounts for less than 1% of the specimen volume. The most common add-on tests recorded during the study period were hepatic and electrolyte/renal/glucose panels. The medicine service ordered mo...
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