Authors discuss on the operative treatment of intracranial aneurysms that rebled during the induction of anesthesia before the main surgical procedures. The preoperative state of the patients had been quite stable. The bleeding manifested itself by risk fluctuations in vital signs, e.g., arrhythmia and blood pressure changes. The operation became extremely difficult, requiring various maneuvers to make room for the clipping of the aneurysms and experienced surgical techniques. Postoperative morbidity was apparently increased, through the patients could recover well with painstaking efforts. Diagnosis and management of such an event will be discussed with a brief review of the literature.
Anesthesia* ; Aneurysm ; Arrhythmias, Cardiac ; Blood Pressure ; Diagnosis ; Hemorrhage ; Humans ; Intracranial Aneurysm* ; Rupture ; Vital Signs

The usual symptoms of brain tumors are signs of increased intracranial pressure, seizures, and focal neurologic deficits. Hemorrhage occasionally occurs in brain tumor, and it may sometimes be sudden and massive. The apoplectic symptom due to sudden tumor bleding can mimic cerebrovascular accident. The authors review literatures and present 2 cases of oligodendrogliomas initially manifested as spontaneous intracranial hemorrhage.
Brain Neoplasms ; Hemorrhage ; Intracranial Hemorrhages* ; Intracranial Pressure ; Neurologic Manifestations ; Oligodendroglioma* ; Seizures ; Stroke

PURPOSE: The aim of this study was to determine the influence of anatomical conditions on primary stability in the models simulating posterior maxilla. METHODS: Polyurethane blocks were designed to simulate monocortical (M) and bicortical (B) conditions. Each condition had four subgroups measuring 3 mm (M3, B3), 5 mm (M5, B5), 8 mm (M8, B8), and 12 mm (M12, B12) in residual bone height (RBH). After implant placement, the implant stability quotient (ISQ), Periotest value (PTV), insertion torque (IT), and reverse torque (RT) were measured. Two-factor ANOVA (two cortical conditions×four RBHs) and additional analyses for simple main effects were performed. RESULTS: A significant interaction between cortical condition and RBH was demonstrated for all methods measuring stability with two-factor ANOVA. In the analyses for simple main effects, ISQ and PTV were statistically higher in the bicortical groups than the corresponding monocortical groups, respectively. In the monocortical group, ISQ and PTV showed a statistically significant rise with increasing RBH. Measurements of IT and RT showed a similar tendency, measuring highest in the M3 group, followed by the M8, the M5, and the M12 groups. In the bicortical group, all variables showed a similar tendency, with different degrees of rise and decline. The B8 group showed the highest values, followed by the B12, the B5, and the B3 groups. The highest coefficient was demonstrated between ISQ and PTV. CONCLUSIONS: Primary stability was enhanced by the presence of bicortex and increased RBH, which may be better demonstrated by ISQ and PTV than by IT and RT.
Dental Implants ; In Vitro Techniques* ; Maxilla* ; Maxillary Sinus ; Models, Anatomic ; Polyurethanes ; Torque