There are few scenarios where good clinical correlation with (or without) a CRP cannot guide patient management. If a second line inflammatory marker is required, as per the indications below, please request a Plasma Viscosity (PV).
Erythrocyte Sedimentation Rate (ESR) will no longer be available to request this.
PV should not be requested for routine situations. Ordercomms (ICE) will be set up to allow specification of PV request rationale:
Whole blood EDTA
Test performed from FBC tube provided it is not underfilled. These tubes are retained for 48hrs therefore a PV can normally be added after sample receipt if required.
Paediatric Samples: If an adult tube cannot be used please use the 1.2mL monovette (similar to the above tube but a smaller diameter).
Screw top microtubes are not suitable.
Clotted samples cannot be tested
1.50 – 1.72 mPa.s
From: Chanarin I Laboratory Haematology 1989
|Interpretation of results – Reference range 1.50 – 1.72 mPa.s (milli Pascal seconds)|
|Low results||<1.50||Found in infants under 3 years old and patients with low immunoglobulin or fibrinogen levels.|
|High results||1.75 – 2.00||Found in many chronic disorders e.g. infection, malignancy, collagen vascular disease.|
|Very high results||2.01 – 3.00||Suggestive of myeloma.|
|Extremely high results||>3.00||Suggestive of Waldenstrom’s macroglobulinaemia.|
Clinical advice is available from the Haematology Medical team (contact RD&E switchboard on 01392 411611)Specimen Labelling Procedure