The Technology

SEER Sonorheometry

Our proprietary technology uses ultrasound to measure the true viscoelastic properties of whole blood during coagulation.

Sonic Estimation of Elasticity via Resonance (SEER)

The Quantra® System is based on a patented technology called SEER (Sonic Estimation of Elasticity via Resonance) Sonorheometry.

SEER uses state-of-the-art ultrasound technology to measure clot stiffness (shear modulus of elasticity) over time using ultrasound-induced resonance.

data acquisition

Data Acquisition

Ultrasound pulses are sent into the blood sample to induce resonance, causing the sample to oscillate.

displacement estimation

Displacement Estimation

As the blood coagulates over time and its stiffness increases, the frequency of oscillation will also increase.

displacement estimation

Clot Time and Clot Stiffness Measurement

Clot times and clot stiffness values are measured from the evolving shear modulus.

Benefits of SEER Sonorheometry

Innovative Technology
SEER (Ultrasound)

No disruption of clots during measurement


  • Robust to vibration
  • Sensitive to soft clots
  • Closed system

Accurate Measurement Method
Shear Modulus (hPa)

True measure of mechanical properties; Accurate assessment of platelet and fibrinogen contribution to clot stiffness


  • Accurate results
  • Novel information

Innovative Design

Comprehensive, automatic internal QC; Designed for the POC; Fully automated


  • Reliable results
  • Excellent precision
  • Small footprint

Send Me Info

explore the quantra
quantra icon

Explore the System

Learn more about the features of our next-gen device designed for the POC and how it empowers clinicians to quickly assess coagulation characteristics.

View the System

medical records
explore icon

Explore Scientific Publications

See articles on clinical studies and sonorheometry as well as the full list of guidelines calling for point-of-care coagulation analysis.

Explore Publications

Copy link
Powered by Social Snap