SU764653A1 - Method of registering variations of intra-scull impedance with extra-scull electrodes - Google Patents
Method of registering variations of intra-scull impedance with extra-scull electrodes Download PDFInfo
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- SU764653A1 SU764653A1 SU762384136A SU2384136A SU764653A1 SU 764653 A1 SU764653 A1 SU 764653A1 SU 762384136 A SU762384136 A SU 762384136A SU 2384136 A SU2384136 A SU 2384136A SU 764653 A1 SU764653 A1 SU 764653A1
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- impedance
- scull
- changes
- electrodes
- extracranial
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Изобретение относитс к области медицины и может быть использовано дл исследовани мозгового кровообра щени при-различных воздействи х в норме и в патологии головного мозга. В насто щее врем единственным нетравматичным и совершенно безопасным способом оценки внутричерепного кровенаполнени у человека вл етс реоэнцефалографи (электроплетизмографи ), прёдствл юща собой запись изменений сопротивлени тканей головы при .пропускании через них электри ческого тока средней частоты в диапа зоне 30-150 кГц Ш. Указанные досто инства этого способа св заны с применением внечерепных электродов, нак ладываемых на кожу головы. Однако реоэнцефалографи имеет су щественный недостаток, заключающийс U регистрации изменени импеданса преимущественновнечерепных тканей. Поэтому судить об изменени х внутричерепного импеданса можно .только -кос венно по изменени м знечерепного импеданса , чт6 приводат к значительной пограаности. Известен также способ регистрации изменений внутричерепного импеданса путем наложени внечерепных электродов на роговицу глаз и на кожу головы над большим затылочным отверстием В результате улучшаетс проникновение Электрического тока внутрь черепа ерез естественные отверсти , что увеличивает информативность «способа {23 . Недостатком этого способа вл етс то, что по регистрации суммарных изменений вне- и внутричерепного.импеданса с определенностью судить об из енени х внутричерепного импеданса нельз . Цель изобретени .- повышение точности регистрации изменений в1 утричерепного импеданса путем исключений изменений внечерепного импеданса, Это достигаетс тем, что вены, собирающие кровь из внечерепных тканей,, пережимают пневматической манжеткой, наложенной на голову испытуемого на уровне нижней челюсти, в результате чего кровенаполнение внечерепных тканей фиксируетс на посто нном уровне и не вносит погрешности в регистрацию изменений импеданса внутричерепных тканей. На фиг. 1 представлена схема реализации способа; на фиг. 2 - кривые изменений импеданса в зависимости от места наложени внечерепных электроThe invention relates to the field of medicine and can be used for the study of cerebral blood circulation under various exposures in normal conditions and in the pathology of the brain. Currently, the only non-traumatic and perfectly safe method for assessing human intracranial hemorrhage is rheoencephalography (electrostimography), which is a recording of changes in the resistance of head tissues when the medium frequency electric current passes through them in the range of 30-150 kHz W. These are The advantages of this method are associated with the use of extracranial electrodes applied on the scalp. However, rheoencephalography has a significant drawback, which consists in registering the change in impedance of predominantly non-cranial tissues. Therefore, it is possible to judge the changes in intracranial impedance. It is only due to changes in the cranial impedance, which leads to a significant degree of impairment. There is also known a method for registering changes in intracranial impedance by applying extracranial electrodes on the cornea of the eye and on the scalp above the large occipital foramen. As a result, the electric current penetrates the inside of the skull through the natural openings, which increases the information content of the "{23. The disadvantage of this method is that by registering the total changes in the extracranial and intracranial impedance, it is not certain to judge the outcome of intracranial impedance. The aim of the invention is to improve the accuracy of recording changes in the 1 uterine cranial impedance by eliminating changes in extracranial impedance. This is achieved by veins collecting blood from extracranial tissues being clamped with a pneumatic cuff applied to the subject's head at the level of the mandible, with the result that the blood volume of the extracranial tissues is fixed at a constant level and does not introduce inaccuracies in the registration of changes in the impedance of intracranial tissues. FIG. 1 shows a scheme for implementing the method; in fig. 2 - curves of impedance changes depending on the place of imposition of extracranial electro
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762384136A SU764653A1 (en) | 1976-07-15 | 1976-07-15 | Method of registering variations of intra-scull impedance with extra-scull electrodes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU762384136A SU764653A1 (en) | 1976-07-15 | 1976-07-15 | Method of registering variations of intra-scull impedance with extra-scull electrodes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU764653A1 true SU764653A1 (en) | 1980-09-23 |
Family
ID=20669865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU762384136A SU764653A1 (en) | 1976-07-15 | 1976-07-15 | Method of registering variations of intra-scull impedance with extra-scull electrodes |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU764653A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690149A (en) * | 1985-10-28 | 1987-09-01 | The Johns Hopkins University | Non-invasive electromagnetic technique for monitoring physiological changes in the brain |
-
1976
- 1976-07-15 SU SU762384136A patent/SU764653A1/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4690149A (en) * | 1985-10-28 | 1987-09-01 | The Johns Hopkins University | Non-invasive electromagnetic technique for monitoring physiological changes in the brain |
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