Method for monitoring blood circulation in cerebral blood vessels

FIELD: medicine.

SUBSTANCE: method involves measuring intracranial blood circulation velocity parameters by means of dopplerography approach using bilaterally arranged transducers. Intracranial venous collector and intracranial arterial blood vessel are concurrently measured on the pathological side. The arterial blood vessel is located with transducer set on the opposite side relative to the pathological focus and the venous one on the side of the pathological focus.

EFFECT: high reliability in estimating blood circulation parameters.

 

The invention relates to medicine, namely to vascular neurosurgery and vascular neurology, and can be used for monitoring blood flow with a comprehensive assessment of alterations of blood flow in the brain during and in the first hours after surgery and to assess the effectiveness of surgical treatment. The main ways to assess intra and postoperative changes of blood vessels in the brain is monitored and, in the first place, ultrasound, transcranial method of locating a blood vessel in the brain.

Closest to the claimed is a method of monitoring blood flow in cerebral vessels (B.v.gaidar, Wearden, D.v.svistov "Transcranial Doppler in neurochirurgie" St. Petersburg Umea, 2000, s.43-44)adopted for the prototype.

With external ultrasonic sensors, rigidly fixed on the head, in the standard Windows locations from disease and healthy by the permanent location of the speed of blood flow parameters in the two middle cerebral arteries, or in the two anterior cerebral arteries, or in the two posterior cerebral arteries in pairs, with each sensor scan the artery with his hand.

The disadvantages of the prototype: it is impossible to adequately assess the significance of hemodynamic changes according to the change of only one arter the material of the vessel on the side of pathology.

The invention is directed to a method of monitoring blood flow in the vessels of the brain, to adequately assess the significance of hemodynamic changes by taking into account indicators of arterial and venous components.

This technical result in the implementation of the method is achieved in that in the known method of monitoring blood flow in the vessels of the brain, including Doppler measurement of the speed parameters of intracranial blood flow through bilateral located ultrasonic sensors, the peculiarity lies in the fact that produce simultaneous measurement of intracranial venous reservoir and intracranial blood vessel on the side of the pathology, while blood vessel scan sensor opposite to the pathology side, and the venous - side pathology.

The method is as follows.

The patient is set on two sides two standard ultrasonic probe 2 MHz, which through standard sonographic window monitor most involved in the pathological process of intracranial arteries and veins. Assessment of blood flow in intracranial Vienna produced by pathology, and the location of the artery on the side of the disease is performed by the sensor, set the Lenna from the opposite side. The proposed method allows the simultaneous assessment of changes in blood flow during and after surgery for arterial and venous component from pathology.

The inventive method is developed and clinically tested in the Polenov research neurosurgical Institute them. Prof. Operated during examination 3 patients with AVM of the brain vessels of different localization.

Examples of extracts from the histories.

Example 1.

Patient K., 33 years old, n and/b 131-2004, with diagnoses AVM posterior cranial fossa, occlusive hydrocephalus. 02.2004 was performed intravascular, superselective embolization of the AVM histogram. In addition to routine preoperative Doppler examination, the patient during the operation was carried out monitoring according to the claimed method. AVM was closed at 80%, followed by 6-hour postoperative monitoring, which allowed us to obtain precise data on venous and arterial components of the AVM in the first hours after the intervention.

The main changes based on monitoring results observed in the arterial component.

Example 2.

C. for 17 years, and a/b No. 318-2004 was diagnosed with arteriovenous malformation of the left frontal lobe, spasms, SAK from 07.2003. Was performed embolization 90% of the AVM with post-surgical monitoring of arterial and venous component in pervachey after the operation.

The use of the claimed method exactly, affordable and non-invasive allowed us to assess the condition of the arterial and venous parts in the dynamics after interventions on the brain vessels.

Example 3.

C. for 22 years, n and/b 784-2004 diagnosed with AVM left frontal and parietal lobes. Made intravascular embolization of histogram. Malformation off from blood flow by 50%. According to the results of postoperative monitoring major changes occurred in arterial and in venous link.

The inventive method allows to adequately assess the significance of hemodynamic changes in various pathologies, given the performance of the arterial and venous components.

Method of monitoring blood flow in the vessels of the brain, including Doppler measurement of the speed parameters of intracranial blood flow through bilateral located ultrasonic sensors, characterized in that produce simultaneous measurement of intracranial venous reservoir and intracranial blood vessel on the side of the pathology, while blood vessel scan sensor opposite to the pathology side, and the venous - side pathology.



 

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1 ex, 1 tbl

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