[Evaluation of blood rheology by patients with acute ischemic stroke with Mexidol administration]

[The impact of therapy with Mexidol on neurological deficit and functional outcome in patients with ischemic stroke: a systematic review and meta-analysis]

OBJECTIVE

To evaluate systematically the published peer-reviewed literature and estimate the effect of therapy with Mexidol on the course and outcomes of ischemic stroke (II) in adult patients.

MATERIAL AND METHODS

The meta-analysis included 11 studies reported In Russian (2 randomized controlled studies, 9 non-randomized, unblinded cohort studies).

RESULTS

The results obtained indicate a positive effect of Mexidol on the course of II in the treated adult patients: we found statistically significant decrease in NIHSS scores on days 7-10 and 21-24 and in modified Rankin scale scores on days 5-7 and days 10-14 compared with the control group. The cumulative effect of the drug was shown: the between-group difference of the NIHSS scores increases with the course of observation time. The effect of Mexidol on indicators on the NIHSS scale is more significant, the greater the initial severity of the patient's neurological deficit.

CONCLUSION

Heterogeneity in study designs and patient characteristics has resulted in significant statistical heterogeneity, and the evidence presented at the time of writing requires further examination as new data become available.

A New In Vitro Blood Hyperviscosity Model

We developed a model of blood hyperviscosity avoiding extreme impact on the blood. The model shows reproducibility in rat blood under common storage conditions (4±1°C; stabilization with citrate-phosphate-glucose additive solution). Storage of rat blood under these condition leads to impairment of its rheological properties, which manifested in an increase in blood viscosity in a wide range of shear rates (3-300 sec^-1). An increase in blood viscosity appeared the first day of storage and reached a maximum on the third day. During further 11-day storage, the blood viscosity did not change significantly. A hybrid macromolecular compound O-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propanoyl)-(1→6)-α-D-glucan improved the hemorheological properties during storage. The most pronounced effect was observed on the third day of storage and manifested in a decrease in blood viscosity in the range of shear rates of 50-300 sec^-1. Thus, storage of rat blood with citrate-phosphate-glucose additive solution for 3 days at 4±1°C reproduces the phenomenon of blood hyperviscosity; this model can be used to screen agents with hemorheological activity.