Published PV Articles and Guidelines

The following published articles and guidelines provide additional information on the benefits of plasma viscosity measurements.  Note that Benson Viscometers is not responsible for these articles, their accuracy, not their continued presence on the internet.

PIP ESR Small Written by Benson Viscometers Limited, this article appeared in Pathology in Practice Feb 2012 and discusses the reasons UK laboratories have changed from ESR to PV for patient tests. PDF

BCSH Guidelines on the Diagnosis and Management of Multiple Myeloma 2010

PDF Written by the Nordic Myeloma Study Group and the British Committee for Standards in Haematology, this document revises and updates previous recommendations, and covers new developments. It lists persistently raised plasma viscosity as an incidental finding for one of the clinical features presented and tables PV as a screening test.

 Acute Phase Proteins, CRP, ESR and Viscosity

letter icon This PatientPlus article was written for healthcare professionals by It discusses the relative merits of each of these testing platforms. This article was last updated in 2010.


Musgrove Pk This article appeared in Pathology in Practice February 2010. It profiles Musgrove Park Hospital, their history of PV testing and brings us up to date. PDF


Article in P-in-P 2005 Written by Benson Viscometers Limited, this article appeared in Pathology in Practice May 2005 and sets out the argumentation and references demonstrating the superiority of
PV over ESR.


NICE Guidance on Improving Outcomes in Haematological Cancers - The Manual

NICE Guidance on Haematological Cancers Published in 2003, this document makes recommendations based on research evidence and addresses clinical effectiveness. It includes a section on diagnosis and makes recommendations for referrals. It includes elevated plasma viscosity associated with anaemia and bone pain as one of the urgent referral indicators.
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About PV

Benson Viscometers Ltd is a British company that manufactures, distributes and maintains a range of clinical viscometers, tuned to analyse blood plasma viscosity.

The range includes a fully automated walk away high volume analyser (BV200) capable of processing 60 samples per hour for large laboratories and a semi automated analyser (BV1) suitable for small laboratories performing up to 50 samples a day.

The company also supplies a full range of control and maintenance reagents to give operators confidence in their results.


BV1 Unit
For confidence in your results

An increasing number of laboratories are electing to use Plasma Viscosity routinely in preference to erythrocyte sedimentation testing (ESR). This is because Plasma Viscosity results are easier to imterpret and results can be fully validated.

What They Say

"Benson Viscometers is the UK leader for plasma viscosity testing systems and we have had a long relationship with Bernie Benson. The BV1 is superbly engineered and easy to use, with a modified PC cabinet and a small footprint. Customer support is second to none." Graham Gibbs MSc CSci FIBMS, Lead Biomedical Scientist, Haematology Dept., Musgrove Park Hospital.

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BV200 Unit
Some PV Facts
  • Patient plasma viscosity (PV) is unaffected by patient anaemia or polycythaemia 
  • Samples can be analysed up to one week after centrifugation 
  • Test results are not affected by anti-inflammatory drugs 
  • Patient PV is not affected by age (>3 years), gender or smoking 
  • A rise of PV in the third trimester of pregnancy is predictable 
  • The only diagnostic test for plasma hyperviscosity