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Results for “Cerebral Ventriculography”

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At least 19 recordsLinked to original sources
PubMed1978

Comparison of metrizamide and iodophendylate for cerebral ventriculography: a long-term ultrastructural study of the ventricular wall in the rat.

Cerebral ventriculography was performed on adult albino rats to compare the effect of metrizamide and iodophendylate on the ependymal wall. The animals were killed by vascular perfusion 1 month and 4 months after ventriculography. The ependymal layer and the underlying brain tissue were examined with the electron microscope. After the use of metrizamide the tissue appeared completely normal. The use of iodophendylate provoked accumulation of phagocytozing macrophages on the ependymal wall and storage of iodophendylate in the ependyma and underlying brain tissue. These changes were present both 1 and 4 months after ventriculography.

Animals↗
PubMed1985

The use of cerebral ventriculography for verification of intracerebroventricular cannula placement in the live rat.

A technique using cerebral ventriculography for verification of intracerebroventricular cannula placement in the live rat is described. A radiopaque contrast medium, diatrizoate meglumine, was injected into the right lateral ventricle through a cannula stereotaxically implanted into the brain. Radiographic visualization of the radiopaque contrast material in the lateral ventricle and the subarachnoid space verified cannula placement. Transient muscular spasms were observed in about 38% of the injected rats but no lasting changes were observed in the behavior or appearance of these rats.

Animals↗
PubMedDate not supplied

Comparison of iothalamate meglumine, metrizamide and iodophendylate in cerebral ventriculography. A clinical, radiological and histopathological study in the rat.

Clinical, radiological and histopathological findings following cerebral ventriculography in the rat using the water-soluble contrast media iothalamate meglumine and metrizamide, and the oil-soluble iodophendylate are reported. Clinically, iothalamate meglumine caused convulsions, while there were no adverse reactions to the other media. Radiologically there was good visualizaiton of the ventricles with all media. Iodophendylate was retained in the ventricles for the duration of the experiment (up to 60 days), while the water-soluble media had disappeared within 20 minutes. Histologically there were no pathological changes attributable to the water-soluble media. Iodophendyalte led to enlargement of the ventricles, and macrophages containing oil were seen on the ependymal lining.

Aminoglycosides↗
PubMed2005

A novel stereotaxic approach to the hypothalamus for the use of push-pull perfusion cannula in Holstein calves.

To determine secretory patterns of growth hormone-releasing hormone (GHRH) and somatostatin (SS) and their roles in the regulation of growth hormone (GH) secretion, a method for collecting hypothalamic perfusates, a push-pull perfusion method was developed in calves. With the use of the stereotaxic apparatus for cattle, a cannula was implanted into the hypothalamus of four male calves based upon cerebral ventriculography. Push-pull perfusates were collected at 10 min intervals for 6h and GHRH and SS concentrations in perfusates and plasma GH concentration were determined by EIAs and RIA, respectively. A cannula was implanted into the hypothalamus based on the image of the third ventricle and maintained for 1 month. GHRH and SS showed pulsatile secretion and the pulses for GHRH and SS were irregular in conscious animals. Neither GHRH nor SS secretion had a clear relationship with GH secretion. In the present study, we thus (1) established a stereotaxic technique for approaching the hypothalamus using cerebral ventriculography for calves, and (2) demonstrated that GHRH and SS secretion were pulsatile but not closely related to GH profile in conscious calves. The technique is useful for the study of the functions of the hypothalamus in the control of pituitary hormones in cattle.

Animals↗
PubMedDate not supplied

[Electronystagmographic evaluation of changes in vestibular reactions after administration of diverse substances into cerebral ventricles].

Vestibulo-oculomotor reflexes (nystagmus) were recorded by the method of electronystagmography in 33 neurosurgical patients before and after ventriculography. Cerebral ventricles were examined using water soluble compounds (conray, dimeriks, amipaque) in 18 patients or water soluble compounds combined with majodil emulsion in 15 patients. Ventriculography by means of water soluble compounds led to insignificant changes in nystagmic parameters while that by means of X-ray contrasting mixtures caused a frequent and noticeable enhancement of stem vestibular reactions as related to all nystagmic parameters and a significant increase of vestibulo-autonomic reactions.

Adolescent↗
PubMed1978

Pulmonary excretion of carbon black injected into the cerebral ventricles of the rat.

After injection of a mixture of carbon black and a iodinated X-ray contrast medium into the cerebral ventricles of rats carbon black loaded macrophages were found in the alveolar septa in the lungs. It is concluded that contrast media used in cerebral ventriculography are eliminated at least partly by discharge of pulmonary macrophages.

Animals↗