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Viscous factors in peripheral tissue perfusion.

G Johnson, B A Keagy, D W Ross

Journal of Vascular Surgery

|July 1, 1985

Summary

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Hematocrit (HCT) and fibrinogen level (FIB) are key factors influencing blood viscosity (VIS). Diabetic patients with peripheral vascular disease (DPVDs) show higher FIB and lower HCT, impacting VIS and treatment strategies.

Area of Science:

Vascular Biology
Hematology
Biophysics

Background:

Blood viscosity (VIS) is influenced by multiple factors.
Diabetic patients with peripheral vascular disease (DPVDs) often exhibit altered hemorheological properties.

Purpose of the Study:

To determine the relative importance of factors affecting blood viscosity in DPVDs.
To identify key predictors of blood viscosity in this patient group.

Main Methods:

Measured hematocrit (HCT), fibrinogen level (FIB), and Ektacytometer indices in DPVDs and healthy volunteers (HVs).
Employed stepwise multiple regression analysis to predict blood viscosity (VIS).

Main Results:

A predictive formula for VIS was developed using FIB, HCT, and Ektacytometer index at 200 mOsm/L (EI 200).

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HCT and FIB emerged as the most significant predictors of VIS.

DPVDs exhibited lower HCT and higher FIB compared to HVs.

Even with similar HCT, DPVDs showed significantly higher FIB and VIS.

Conclusions:

Hematocrit and fibrinogen level are the primary determinants of blood viscosity.
Elevated FIB in DPVDs has potential implications for therapeutic interventions, including drug and surgical treatments.