✓ A new operative method for treating recurrent chronic subdural hematoma is presented. This method consists of complete obliteration of the subdural hematoma cavity and conversion of the hematoma cavity into epidural space. The procedure was carried out in three patients with recurrent chronic subdural hematoma, all of whom made a complete recovery.
The colloid cyst of the third ventricle is a rare and unique tumor located in the anterior part of the third ventricle, just below the foramen of Monro. Since the lesion presents a great variety of signs and symptoms, the diagnosis is notoriously difficult if ventriculography or computed tomography is not performed. In the present article, one case is reported and 350 cases in previous publications are reviewed. A 45-year-old male developed a transient loss of consciousness followed by nausea and vomiting. He had two similar episodes in the previous 15 years. Computed tomography disclosed marked enlargement of lateral ventricles and a small round lesion in the anterior third ventricle. The cystic tumor, 9mm in diameter, was successfully removed by the trans-lateral ventricular approach with microsurgical techniques. A review of previous cases showed diverse clinical manifestations of the cyst. The signs and symptoms were classified into the following groups. (1) Due to moderate and/or intermittent disturbance of cerebrospinal fluid (CSF) flow: headache(82%), nausea and vomiting(53%). (2) Due to sudden, severe obstruction of the CSF pathway: acute deterioration, often fatal(19%). (3) Due to chronic, mild disturbance of CSF flow: progressive dementia(16%), disturbance of gait(15%) and urinary incontinence (9 %). (4) Miscellaneous: false localizing signs etc. The “classical story” of the cyst, which is characterized by intermittent attacks of headache related to abrupt movements of the head, was noted only on a few occasions(7%). The diagnosis is readily made by computed tomography. Good results can be expected in surgical cases.
We have developed a classifier of cyclone type to eliminate coarse acrylic resin particles of 30μm size and over from the other fine. The classifier is composed of the outside and inside collection boxes, which configure the slit convex upward for separating. When the blow-up air from the outside box flows rotating into the slit, the coarse particles are selectively collected to the outside box by the centrifugal force of the rotating flow, which predominates over the drag force induced by the blow-up.This paper investigated the influence of the width of the slit and the blow-up flow rate etc. on the performance, which was evaluated with the yields and the partial separation efficiency.As a result, the classifier was optimized, and the feature was demonstrated in detail. Furthermore, the classifier proved to possess the high capability for separating without extremely decreasing the yield by means of coordinating the blow-up flow rate with the cyclone's main flow.
A new metabolite named emecorrugatin A, which caused lethal paralysis in mice, and its analogue named emecorrugatin B were isolated from an Ascomycete, Emericella corrugata, together with two known toxic metabolites, sterigmatocystin and norsolorinic acid.
We, Daido Steel Co., Ltd., began titanium alloy production at our first Levitation Induction melting Furnace, we named LIF, in our Hoshizaki Plant in 2007. The LIF is a cold crucible semi-levitation melting furnace (CCLM) that has bottom tapping nozzle. A 1.8 metric tons ingot has been made by a combination of LIF and Vacuum Arc Remelting. The LIF performs completely uniform melting and enables to melt high-melting point metals.Therfore, we can produce high grade titanium alloys with high melting point metals such as pure tantalum or pure niobium. We has produced many kinds of titanium alloys for 7 years by LIF. However there are some issue in melting and bottom tapping process. In this article, we show those problems.
Two cases of dolichoectatic basilar artery with a mass effect to the brainstem structure were treated by reducing hemodynamic stress. In one case, angiograms showed the dolichoectatic basilar artery creating a turbulent flow in the vertebrobasilar junction, and unilateral vertebral artery clipping in addition to posterior fossa decompression was performed. The other case, a combination with bilateral internal carotid artery occlusion, underwent bilateral superficial temporal artery-middle cerebral artery anastomoses. The possible surgical treatments of dolichoectasia are discussed.
Four pediatric patients with malignant brain tumors were treated with very high-dose etoposide plus very high-dose cyclophosphamide (HD-VP 16/CPM) followed by autologous bone marrow rescue. There were two brain stem gliomas, which were refractory to radiation therapy, ACNC, and beta-interferon and two relapsed malignant brain tumors. Both of the two with brain stem gliomas achieved response, one with clinical improvement and decrease of tumor size on CT scanning, the other with clinical improvement. Overall response duration was three months and nine months. Two patients with relapsed brain tumors received HD-VP 16/CPM as adjuvant chemotherapy. Low but significant levels of VP 16 and CPM were detected in CSF. Further investigation of HD-VP 16/CPM is needed as a chemotherapy for malignant brain tumors in children.
Abstract Two adult patients with unilateral chronic subdural hematomas are reported because of the presence of dilatation of the lateral ventricle opposite the hematoma. In both cases, dilatation was limited to the contralateral atrium and the occipital and temporal horns. The selective dilatation, we believe, is explained on the basis of the anatomy of the skull base and the falx. This phenomenon may contribute to an increase of the supratentorial pressure, originally elevated by the hematoma. This characteristic finding on computed tomographic scans should be regarded as critical in cases of chronic subdural hematoma.
