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General Information, Hematology

Test Update: Cell Count with Differential, Body Fluid

Beginning Tuesday, January 4, 2022, Spectrum Health Laboratories will include an automated neutrophil (PMN) count on Cell Count with Differential, Body Fluid (LAB210) orders for peritoneal body fluids.   This component will be displayed in Epic as an absolute PMN count, body fluid.

• The absolute PMN count in the peritoneal fluid is calculated by multiplying the total nucleated cell count by the percentage of PMNs in the differential.

• This calculation aids in the diagnosis of spontaneous bacterial peritonitis (SBP).

• The diagnosis of bacterial peritonitis is established by a positive peritoneal fluid bacterial culture and an elevated peritoneal fluid absolute PMN count (≥250 cells/uL).

• Epic will automatically calculate the absolute PMN count in peritoneal body fluids based on the manual differential data.

• This component ONLY calculates for Cell Count with Differentials (LAB210) on PERITONEAL BODY FLUIDS Continue Reading

General Information, Hemostasis/Coagulation

Test Update: Prothrombin Time (Protime/PT)

Effective December 6, 2021, Spectrum Health Reference Laboratory (SHRL) Coagulation department will go live with a new lot of Prothrombin Time (Protime/PT) reagents. The reference range for the PT will be adjusted to reflect this reagent lot change and align with our Regional Laboratories. The new reference range will be 9.5 – 12.0 seconds. There will be no change to the INR ranges.

Test Current Reference Range New Reference Range
Prothrombin Time (PT) 9.7 – 12.6 seconds 9.5 – 12.0 seconds

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General Information, Hemostasis/Coagulation

Update: Platelet Aggregation Studies

The Spectrum Health Regional Laboratory Coagulation Department will be going live with the Helena AggRam analyzer on February 3, 2021.  This analyzer uses platelet rich plasma to analyze human platelet aggregation which is measured by absorbance.  The following aggregating agents are used in these studies: Arachidonic Acid, ADP, Collagen, Epinephrine, and Ristocetin.

Patients for platelet aggregation studies should be resting, fasting, and non-smoking. Patients should avoid taking any prescription or over the counter medications known to affect platelet function for ten (10) days to two (2) weeks prior to the studies. For a list of medications known to have anti-platelet effects, click here. Continue Reading