Support Literature

Each article created by Benson Viscometers is available here in a pdf format. Click each icon to open a new window.

Screening for Hyperviscosity Syndrome

Hyperviscosity Syndrome article This discussion booklet is primarily aimed at Plasma Hyperviscosity especially concerning the detection and importance of regular monitoring. The clinical summaries are derived from the wealth of lirerature available Hyperviscosity Syndrome article


PV and ESR Comparison table

PV vs ESR This table reviews the clinical and technical aspects of PV and ESR monitoring.


Laboratory sample letter to GPs and clinics

Draft letter explaining switchover from ESR to PV This letter provides the background to making the change from ESR to PV, provides additional information regarding the test, results interpretation and a reference list. Customers have permission to use and amend to suit their communication needs.


Reference List

List of clinical articles A comprehensive but not exhaustive list of clinical articles researching into plasma viscosity. Most papers in this list are not very recent but that is down to the paucity of ongoing research. Please contact us if you would like more references.
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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