M.ER1, G.ZAMORA1, J.G.TAN1, P.Y.HENG1, M.S.WONG1
Khoo Teck Puat Hospital1
Osmolality is a valuable clinical tool. It can be used to evaluate the body’s fluid balance, screen for toxins and monitor treatment effectiveness.
The 3320 Micro-Osmometer requires users to manually transcribe written results to the Laboratory Information System (LIS). With an increased annual workload, this practice is fraught with potential for errors that may compromise patient safety. We evaluated the new Osmo1® Micro-Osmometer as a replacement and an upgrade from the 3320.
We describe our experience with the new Osmo1® and performed trueness studies to evaluate its’ suitability as a replacement. A secondary trueness study was performed to evaluate the equivalence of results between serum and plasma samples collected from the same patients within the same draw.
Trueness studies showed comparative results from the two models, yielding a linear regression of Y=0.979X + 3.6, R2=0.99. The secondary study showed no major clinical difference between plasma and serum osmolality with a mean bias of 2.2mmol/kg (95% CI: 0.9-3.5)
Osmo1®’s integrated barcode scanner and LIS connectivity enables traceable sample identification and eliminates the need for a 2nd-person verification. The increased data storage capacity further allows for efficient data management.
The Osmo1 is a satisfactory replacement and upgrade, boasting improvements to user interface, functionality and connectivity that aids in the reduction of transcription errors. Furthermore, with acceptability of both serum and plasma specimens, number of blood tubes drawn are reduced, providing relief to patients, phlebotomists and reducing possibility of sample mismanagement in the laboratory.