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PRODUCTS
COMBINED ANALYSIS OF CEREBRAL BLOOD FLOW
COMBINED ANALYSIS OF CEREBRAL BLOOD FLOW AND THE BRAIN ELECTRIC ACTIVITY

A UNIQUE FEATURE!

Joint impedance plethysmography and electroencephalographic study efficiently reveals correlations between different abnormalities in cerebral blood flow and in brain electric activity.

Synchronous monitoring of EEG and REG data with a concise display of index variations on a single time scale clearly demonstrates correlations between different systems of the body.

The system software allows to analyze various combinations of recorded indices in selected time intervals using advanced methods of computer analysis and data representation.

Combined recording of EEG, REG, offset potentials, and other polygraphic signals, which are concisely represented by trends of index variability on a single time scale, greatly expands the potential for diagnosis in a wider scope of abnormalities and disorders.

This allows to:

  • Monitor the correctness of study process (e.g. by tracking the patient's response in hyperventilation tests);
     
  • Consider the role of vascular factor in epilepsy;
     
  • Reveal patients with improperly developed breathing patterns leading to cerebrovascular conditions;
     
  • Improve the quality of syncopal condition diagnosis;
     
  • Study the character of interactions between the body systems in various conditions;
     
  • Justify the selection of a particular therapeutic treatment and estimate its efficiency.

Combined assessment of EEG, REG, ECG, and other polygraphic data is offered only by "Encephalan-131-03" Electroencephalograph-Analyzer and "RHEAN-POLY" Rheograph-Polyanalyser systems produced by Medicom-MTD, Ltd.

Combined analysis of EEG and REG signals in the split-screen mode



zoom

Left screen: initial background state; right screen: "Hyperventilation, 3rd min" test.

Pronounced deterioration of EEG and REG signals with the appearance of paroxysmal activity in EEG and reduced cerebral pulsatile blood filling shown as decreased rheographic index (RI) is demonstrated.

Bar graphs

Bar graphs in the initial background state (dark blue bars) and in "Hyper-ventilation, 3rd min" test (red bars).

The left axis represents variation of qualitative indices.

It is clearly demonstrated that the bar graphs virtually are not overlapped for most of the indices.

Trends (beat-by-beat index variations)

Pronounced deterioration of indices related to different body systems in response to a provocation is demonstrated:

Rheographic Index began to drop significantly in 30-40 sec after starting hyperventilation (HV) and only at the 3rd sec of HV appeared the significant changes in EEG: a sharp rise in slow activity with paroxysmal events and a drastic drop in alpha activity.

The variability graphs more clearly demonstrate significance of quantitative EEG indices and also that the changes have been reflected in other signals:

peripheral vascular tonus has elevated (shown as lower PPG amplitude),

heart rate has increased,

and build-up of ultra-slow activity occurred in the course of hyperventilation.

RF Patents

RF Patents NN 2248745, 2252692