Suggestive of Waldenstrom’s macroglobulinaemia. Interpretation of results – Reference range 1.50 – 1.72 mPa.s (milli Pascal seconds) Factors affecting resultsįrom: Chanarin I Laboratory Haematology 1989 Test Usage Paediatric Samples: If an adult tube cannot be used please use the 1.2mL monovette (similar to the above tube but a smaller diameter). These tubes are retained for 48hrs therefore a PV can normally be added after sample receipt if required. Test performed from FBC tube provided it is not underfilled. If CRP has been shown to inadequately reflect disease activity in a patient with established chronic inflammatory illness (such as rheumatoid arthritis or systemic lupus erythematosus), then monitoring with PV will be appropriate.If a systemic inflammatory illness such as rheumatoid arthritis or systemic lupus erythematosus is suspected and CRP is normal, then PV may be appropriate to establish a baseline for monitoring.Appropriate management of these indications should not be delayed while results are pending. If temporal arteritis (TA)/giant cell arteritis (GCA) or hyperviscosity syndrome is suspected, then PV, although not necessary, may be requested.Ordercomms (ICE) will be set up to allow specification of PV request rationale: PV should not be requested for routine situations. If a second line inflammatory marker is required, as per the indications below, please request a Plasma Viscosity (PV).Įrythrocyte Sedimentation Rate (ESR) will no longer be available to request this. There are few scenarios where good clinical correlation with (or without) a CRP cannot guide patient management.

Recommendations for inflammatory marker testing in Devon from May 2022: C-Reactive Protein (CRP) should be your first line inflammatory marker test of choice Plasma viscosity measurement is no longer available in this laboratory or across New Zealand due to the difficulty of obtaining correct instrumentation and.

Plasma viscosity test