RBC_Lorrca

Lorrca®

See www.lorrca.com for more information.

Laser Optical Rotational Red Cell Analyzer

Lorrca Maxsis osmoscan (Lorrca®) is a unique instrument which combines  Red Blood Cell (RBC) deformability by ektacytometry, osmoscan and aggregometry; all temperature controlled. It is capable of fully automated measurement and calculation of various phenomena of RBC’s by analysis of their rheological behavior. The technique accurately detects deformability as a function of shear stress, pre-hemolytic stability and aggregation of the RBC’s and is of added value for hematology analysis.

Scope

Possible measurements of the instrument
Evaluation of the rheology of blood in different parts of the body is a very specific task, therefore it is important to have a technique available that can accurately measure the RBC properties. Lorrca incorporates a variety of techniques to perform these specific measurements:

• Deformability: Laser diffraction ektacytometry, Parameterization of deformation curve, Cell- and cell membrane stability
• Osmoscan: Deformability under an osmotic gradient, Osmotic Resistance Test
• Aggregation & dis-aggregation: Syllectometry – Extent of aggregation, aggregation kinetics and tendency

 

Lorrca Operations

 

Deformability

Red blood cell deformability, expressed as the Elongation Index (El), is presented in a deformability curve. A thin layer of RBC’s, suspended in PVP, is sheared between two concentric cylinders. A known shear stress is applied to the cells, resulting in the elongation (deformation) of the RBC’s. This process is measured by a laser beam diffraction pattern; captured with a video camera and analyzed by a computer.

RBC deformability curve

RBC_Deformability 

Osmoscan

The osmoscan measures the RBC deformability under various osmotic conditions. This results in a continuous curve.

Osmoscan

Lorrca<sup>®</sup> Osmoscan

 

 

Typical osmoscan curves

Osmolality_Curves

 

Aggregation & dis-aggregation

Lorrca measures the speed at which rouleaux formation occurs and is presented in a syllectogram. By means of a photodiode (which measures the change in light absorption) the tendency and kinetics of aggregation are displayed, as well as the minimal shear rate (threshold) needed to prevent RBC aggregation.

RBC Syllectrogram

RBC_Syllectogram

 

For further information and insights in the possible applications of Lorrca send a mail to sales@rrmechtronics.com

More information can be found at our RR Mechatronics portal