Shunichiro Fujimoto

Serial Observations of Brain Stem Function in Acute Intracranial Hypertension by Auditory Brain Stem Responses — A Clinical Study

Recently, multimodality evoked potentials have been used for the evaluation of brain function in patients with severe head injury and acute intracranial hypertension. We have studied the changes in brain stem function in patients with acute intracranial hypertension without any pressure difference between the supra- and infratentorial space and with central and uncal herniation, by measuring the auditory brain stem responses (BERs) that reflect the functional and structural integrity of the brain stem auditory pathway.

Changes in Local Blood Flow of the Brain Stem in Acute Intracranial Hypertension — An Experimental Study

In patients with supratentorial space-occupying lesions, dysfunction of the brain stem secondary to ischemia and distortion is the most important factor for their morbidity and mortality. This study has been carried out to evaluate the effect of supratentorial mass lesions on the local cerebral blood flow (1-CBF) of the brain stem with special reference to the following three points.

Measurement of Regional Cerebral Blood Volume by Photoelectric Method

The cerebral blood volume (CBF) has been considered as an Important parameter in regulation of the cerebral hemodynamics. However, methodological difficulty in measurement of CBV has been well known. This paper is concerned with a photoelectric apparatus which has been developed in our laboratory.

The Reconstructions for Vertebral Artery Stenosis at the Origin. A Comparison between PTA and Surgical Reconstructions.

To date in our hospital, surgical reconstructions and percutaneous transluminal angioplasty (PTA) were carried out in 168 patients with vertebral artery (VA) stenosis at the origin. In this article, we discuss the comparison between surgical reconstructions and PTA, especially regarding long term follow up, patency and complications. PTA is a less invasive treatment for VA stenosis at the origin than surgical reconstructions. However, restenosis after PTA occurred in 20% of the patients. On the other hand, restenosis after surgical reconstructions did not emerge even in long term follow up. An embolism after PTA occurred in 2.6% of the cases. However, the embolism occurred in only the first 10 patients of our series, after that there was no embolism. We concluded that PTA was the first choice for VA stenosis at the origin, if the angiogram did not reveal any PTA difficulty. If restenosis after PTA was performed, we selected surgical reconstruction for VA stenosis at the origin.

The rebuilding of normal venous circulation for transverse-sigmoid dural arteriovenous fistulas by percutaneous transluminal angioplasty. A case report.

The etiology of dural arteriovenous fistulas (DAVFs) remains controversial as is the issue of whether occlusion or stenosis of the transverse sinus and sigmoid sinus is a cause or a result of DAVFs. We report a case of DAVFs with transverse-sigmoid sinus occlusion and cortical venous reflux. In this case, the reconstruction of normal venous circulation by percutaneous transluminal angioplasty (PTA) for the occluded sinus was performed and cortical venous reflux diminished. PTA may be a useful treatment for DAVFs with occluded or stenotic sinus.