Laser diffractometry technique: clinical applications to vascular pathologies.

Area of Science:

• Biomedical Engineering
• Cardiovascular Physiology
• Rheology

Background:

• Hypertension (HTA) and dyslipidemia (DLP) are key risk factors for cardiovascular and cerebrovascular ischemic diseases.
• Vascular damage from HTA and DLP involves metabolic and mechanical pathways.
• Hemorheological alterations in HTA impact red blood cell (RBC) structure and plasma interactions, affecting blood flow.

Purpose of the Study:

• To investigate hemorheological alterations in hypertension and dyslipidemia.
• To evaluate the Erythrodeformeter's capability in detecting RBC membrane changes.
• To correlate erythrocyte rheological parameters with vascular pathologies.

Main Methods:

• Utilized laser diffractometry with the "Erythrodeformeter" to measure RBC membrane parameters.
• Obtained stationary parameters: Deformability Index, surface viscosity, elastic modulus.
• Acquired complex viscoelastic parameters (dynamic elasticity, viscosity components) in oscillating mode.

Main Results:

• The Erythrodeformeter accurately measures stationary and dynamical RBC parameters via laser diffractometry.
• Diffraction pattern geometry correlates with cell deformation (elongation).
• Detected pathological alterations on RBC membranes affecting blood flow in vivo.

Conclusions:

• Rheological parameters provide crucial information on erythrocyte membrane integrity.
• The Erythrodeformeter is sensitive for detecting and characterizing RBC alterations in vascular diseases.
• Understanding these hemorheological changes aids in assessing cardiovascular and cerebrovascular risks.