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ABSTRACT: To introduce a kind of method for skull base reconstruction after resecting anterior skull base tumors involving paranasal sinuses.
A retrospective analysis was carried out on 13 patients who underwent anterior skull base reconstruction. Pericranial flap were detached with integrity from the frontal bone during craniotomy, after the tumor had been resected partitionedly, the cribriform plate of ethmoid bone which was involved by tumor was resected. Using the fat tissue to fill the skull-base defects and sutured the pedicled pericranial flap with surrounding normal dura mater. Then reinforced at the junction of pericranial flap and dura mater with biogel.
The pathogenic diagnosis of all cases were meningioma. I grade resection was acquired in 12 cases and II grade in 1 case according to Simpson grading standard of meningioma resection. The postoperative complications were 3 cases aseptic meningitis, 3 cases frontal syndrome. No CSF leakage, intracranial infection, nor death occurred. An average of 3. 4-year follow-up was achieved in all the cases from 9 months to 8 years, no tumor relapse.
CSF leakage can be effectively prevented by filling the skull-base defects with the fat tissue, suturing the pedicled pericranial flap with surrounding normal dura mater, and reinforcing at the junction of pericranial flap and dura mater with biogel.
Lin chuang er bi yan hou ke za zhi = Journal of clinical otorhinolaryngology 03/2011; 25(5):210-2.
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ABSTRACT: To study the clinical characteristics and operative effect of hippocampus lesions.
We retrospectively analyzed the clinical characteristics and operative outcome of 44 patients with hippocampus lesions between August 2005 and April 2010.
Seizure attack was the initial symptom among 40 of the 44 patients. Pathological examinations revealed 18 gliomas, 9 cavernous malformations, 12 hippocampus sclerosis, 2 focal cortical dysplasia, 1 atypical hyperplasia, 1 injury glial scar, and 1 encephalomalacia. Thirteen patients received anterior medial temporal lobectomy and the other 31 received lesionectomy or selective amygdalohippocampectomy via transsylvian approach. An average of 15.7 month follow-up was accomplished in 37 patients. Postoperative epileptic outcomes were evaluated according to Engel classification: Grade I 73.0%(27/37), Grade II 13.5%(5/37), Grade III 10.8%(4/37) and Grade IV 2.7%(1/37). No perioperative death occurred. One patient experienced hemiplegia but recovered 8 months after the operation. Noticeable postoperative visual field deficit was left in 2 patients. Two patients with glioma died of remote tumor recurrence during follow-up.
Seizure attack is a major complaint of hippocampus lesions. Satisfactory seizure and tumor control may be achieved through anterior medial temporal lobectomy or selective amygdalohippocampectomy with lesionectomy.
Zhong nan da xue xue bao. Yi xue ban = Journal of Central South University. Medical sciences 12/2010; 35(12):1282-7.
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ABSTRACT: A laboratory testing of simultaneous removal of ammonium and sulfate (SRAS) was studied from an anammox process in an anaerobic bioreactor filled with granular activated carbon. Two different phases of experiment were investigated to start up the SRAS process, and final batch tests were performed to analyze the SRAS process. The experiment included an anammox process and an SRAS process. During the anammox process, the highest removal efficiency of ammonium and nitrite was up to 97 and 98%, respectively. After 160 days in the stationary phase of anammox process, the ratio of ammonium to nitrite consumption was approximately 1:1.15, which is much higher than 1:1.32 in the traditional anammox process. The extra electron acceptor, such as sulfate, was thought to react with ammonium by bacteria. Synthetic wastewater containing ammonium chlorine and sodium sulfate was used as the feed for the bioreactor in the second phase of experiment. During the SRAS process, the influent concentrations of ammonium and sulfate were controlled to be 50-60 and 210-240 mg L(-1) respectively. After start-up and acclimatization of this process for 60 days, the average effluent concentrations of ammonium and sulfate were 30 and 160 mg L(-1), respectively. The simultaneous ammonium and sulfate removal was detected in the reactor. In order to further validate the biochemical interaction between ammonium and sulfate, batch tests was carried out. Abiotic tests were carried out to demonstrate that the pure chemical action between ammonium and sulfate without microorganism was not possible. Biotic assays with different ammonium and sulfate concentrations were further investigated that high concentrations of ammonium and sulfate could promote simultaneous removal of ammonium and sulfate. And elemental sulfur and nitrogen gas as the products measured in the SRAS process helped to demonstrate the occurrence of new interaction between nitrogen and sulfur. The new process of SRAS in the inorganic condition, including simultaneous removal of ammonium and sulfate, and the appearance of elemental sulfur and nitrogen gas as the terminal products, widened the cycle approach between nitrogen and sulfur.
Journal of hazardous materials 04/2009; 169(1-3):113-8. · 4.14 Impact Factor
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ABSTRACT: A set of simultaneous aerobic and anaerobic (SAA) bio-reactor system was used for the removal of organic pollutants and ammonia in the landfill leachate generated from Datian Shan Landfill in Guangzhou, China. The influent concentrations of COD and were 1000–3300 and 80–230 mg L−1, respectively. The average effluent concentrations of COD and were 131 and 7 mg L−1, respectively. The concentrations of COD and had reached the Chinese second grade effluent standard (COD < 300 mg L−1, < 25 mg L−1) for this kind of wastewater. Gas chromatogram–mass spectrum (GC/MS) analysis was used to measure the organic pollutants in the landfill leachate. About 87 organics were detected in this landfill leachate, and 16 of them belong to the list of environmental priority pollutants established by the US Environmental Protection Agency. About 31 of the 87 organic pollutants were completely removed by the SAA bio-reactor, the concentrations of further 14 organic pollutants were reduced by more than 80%, and the removal efficiencies of the other 25 organic pollutants were over 50%.
Chemosphere.
