Solid state and fuild-field

emka TECHNOLOGIES offers blood pressure catheters for use with rodents (mice and rats) and large animals (from rabbits to cows):

  • emka Blood Pressure Transducer is a fluid filled catheter, adapted to the size of the artery, ideal for blood pressure measurements in the range of -50 to + 300 mmHg.


  • Transonic Scisense Catheters offer solid-state sensors mounted at the tip, to measure pressures with a high degree of precision. They are ideal for arterial, venous or cardiac pressures due to the solid-state sensor’s ability to accurately respond to minute and rapid changes in pressure.

Solid state pressure

A solid state sensor contains a piezoresistive membrane, which is an electromechanical systems that react to compression1. Placed at the tip of the catheter, this flexible membrane is in direct contact with the blood, and generates a voltage when deformed by the blood pressure. The force of the blood pressure is then transmitted to an amplifier, through the catheter’s wires housed into a polyimide tubing.

1 Piezoelectric sensor definition from Wikipedia.

Output Parameters:

  • 2 independent pressure channels


Fluid-filled pressure

As it names implies, a fluid-filled catheter is filled with a fluid. The blood pressure is applied at the catheter tip and transmitted through the fluid to the proximal side of the tubing, where the sensor is located.

Output Parameter:

  • 1 pressure channel

Solid state pressure

  • Accurate: with a hight natural frequency response, measurements such as dP/dt are very accurate, especially in rodents
  • Sensitive: Stable zero baseline with low or negligible offset.
  • Ideal balance of flexibility and rigidity, with polyamide tubing
  • Ease of use: Tactile-button operation and system menus, 2 point electronic calibration with balance controls for each pressure channel.


Fluid-filled pressure

  • Cost-effective
  • Calibrated and temperature-compensated
  • Easy removal of air bubbles, with its in-line design

A typical setup includes:


For Fluid filled catheters :

  • usbAMP (direct connection to fluid filled cathethers) or easyMATRIX3 device, to interface with the acquisition computer.


For Solid state pressure catheters:

  • An usbACQ
  • A SP200 Pressure Control Unit: This dual-amplifier control box is used to amplify and condition the signal.

Solid state pressure

Catheter size is based on animal weight and application. Small vessel applications may require a smaller size than the listed suggestion.

All 7.0F Catheters are available with an optional lumen to allow drug administration, blood sampling or guide wire insertion.


Fluid-filled pressure

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