Neurochirurgische Klinik


Neurochirurgische Klinik

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Kirsch M.,University of Greifswald | Berg-Dammer E.,Klinik fur Neurologie | Musahl C.,Neurochirurgische Klinik | Bazner H.,Neurologische Klinik | And 2 more authors.
Neuroradiology | Year: 2013

Introduction: The purpose of this study was the evaluation of the safety and efficiency of the endovascular treatment of spinal dural arteriovenous fistulas (SDAVFs). Methods: Between May 1992 and August 2012, 78 patients (59 men) with an angiographically proven SDAVF with pial venous drainage were treated by endovascular embolization (n = 61) and/or surgery (n = 31) at three German hospitals by a single team of physicians and according to a uniform therapeutic concept. Results: Endovascular treatment resulted in a complete occlusion of the fistula in 47 cases (77 %). After failed embolization with residual shunt, 14 DAVFs were surgically cured (23 % failure rate). We had one permanent and two minor complications after endovascular therapy. Within a postoperative period of 2 weeks, 73.6 % of patients improved in gait disability, 51.1 % in micturition function, and 70.5 % in paresthesia of the lower extremities. Long-term follow-up data showed further improvement of clinical symptoms confirmed by normalization or resolution of spinal changes on MRI. Conclusions: An interdisciplinary approach to the management of SDAVFs is mandatory. Patients without a common origin of arteries supplying the spinal cord and the dural fistula, and without a stenosis or occlusion of the concerning segmental artery are potential candidates for endovascular treatment (diluted n-butyl-2-cyanoacrylate). Only occlusion of the "nidus" and the proximal segment of the draining vein can lead to clinical improvement. © 2013 Springer-Verlag Berlin Heidelberg.

Van Der Lely A.J.,Erasmus University Rotterdam | Biller B.M.K.,Harvard University | Brue T.,Aix - Marseille University | Buchfelder M.,Neurochirurgische Klinik | And 8 more authors.
Journal of Clinical Endocrinology and Metabolism | Year: 2012

Context: Pegvisomant is a GH receptor antagonist. The ACROSTUDY is a global safety surveillance study of long-term treatment of acromegaly with pegvisomant. Objective: The objective of the study was to monitor long-term safety and treatment outcomes. Design: ACROSTUDY is open to all patients with acromegaly who are treated with pegvisomant. We report an interim analysis of data captured from 1288 subjects enrolled before a database freeze of December 31, 2009. Setting: This was a global noninterventional surveillance study. Main Outcome Measure(s): Long-term monitoring of safety, including central magnetic resonance imaging (MRI) reading and treatment outcomes, was measured. Results: Subjects (n = 1288) were treated with pegvisomant for a mean of 3.7 yr and followed up in ACROSTUDY for a mean of 2.1 yr. A total of 1147 adverse events (AE) were recorded in 477 subjects (37%), among which 192AEin 124subjects (9.6%) were considered to be related to pegvisomant. Serious AE were recorded in 159 subjects (12.3%), whereas pegvisomant-related Serious AE were recorded in 26 subjects (2%). No deaths (15 subjects; 1.2%) were attributed to pegvisomant use. The incidence of increase in pituitary tumor size in the subset with confirmed MRI increases on central reading represented 3.2% of the overall cohort with at least two available MRI (n = 936). Injection-site reactions were reported in 28 cases (2.2%). In 30 patients (2.5%), an elevated aspartate aminotransferase or alanine aminotransferase of more than 3 times the upper level of normality was reported. There were no reports of liver failure. After 5 yr of pegvisomant treatment, 63.2% of subjects had normal IGF-I levels at a mean dose of 18 mg/d. Conclusions: Data entered and evaluated in ACROSTUDY indicate that pegvisomant is an effective and safe medical treatment in patients with acromegaly. The reported low incidence of pituitary tumorsize increase, liver enzyme elevations, and lipodystrophy at the injection site are reassuring. Copyright © 2012 by The Endocrine Society.

Voges J.,Otto Von Guericke University of Magdeburg | Krauss J.K.,Neurochirurgische Klinik
Nervenarzt | Year: 2010

Deep brain stimulation (DBS) is an important component of the therapy of movement disorders and has almost completely replaced high-frequency coagulation of brain tissue in stereotactic neurosurgery. Despite the functional efficacy of DBS, which in parts is documented on the highest evidence level, the underlying mechanisms are still not completely understood. According to the current state of knowledge electrophysiological and functional data give evidence that high-frequency DBS has an inhibitory effect around the stimulation electrode whilst at the same time axons entering or leaving the stimulated brain area are exited leading to modulation of neuronal networks. The latter effect modifies pathological discharges of neurons in key structures of the basal ganglia network (e.g. irregular bursting activity, oscillations or synchronization) which are found in particular movement disorders such as Parkinson's disease or dystonia. The introduction of technical standards, such as the integration of high resolution MRI into computer-assisted treatment planning, in combination with special treatment planning software have contributed significantly to the reduction of severe surgical complications (frequency of intracranial hemorrhaging 1-3%) in recent years. Future developments will address the modification of hardware components of the stimulation system, the evaluation of new brain target areas, the simultaneous stimulation of different brain areas and the assessment of different stimulation paradigms (high-frequency vs low-frequency DBS). © Springer-Verlag 2010.

Kapapa T.,Universitatsklinikum Ulm | Woischneck D.,Neurochirurgische Klinik | Tjahjadi M.,Universitatsklinikum Ulm
World Neurosurgery | Year: 2014

Background: This study sought to examine health-related quality of life several years after spontaneous nontraumatic subarachnoid hemorrhage. Recent studies report impairments to be improved as far as normal levels. We question such an improvement in our own patient population over a period of 10 years. Methods: The Medical Outcomes Study 36-Item and Medical Outcomes Study 12-Item Short-Form Health Surveys on health-related quality of life were used to question 236 patients and 235 proxies. The patients were assigned to 5 groups according to the time that had elapsed since their hemorrhage: 1 year N = 22, 2 years N = 36, 5 years N = 86, 8 years N = 61, and 10 years N = 31. Analyses of variance (ANOVA, Kruskal-Wallis) and correlation (Spearman, Kendall tau) were used in an exploratory approach. Significance was established as P ≤ 0.05. Results: Over a period of 10 years, health-related quality of life is found to be impaired, and is reported as such by the patients themselves and their proxies. Comparison of the mean values between the groups, ie, 1, 2, 5, and 10 years, revealed no significant differences in health-related quality of life. The calculations with a view to correlations between the group means and time since hemorrhage also produced only very weak correlations of no significance. Conclusions: Health-related quality of life is impaired over a period of 10 years. Spontaneous nontraumatic subarachnoid hemorrhage should be regarded as a chronic cerebrovascular condition. © 2014 Elsevier Inc.

Konig S.A.,Neurochirurgische Klinik | Spetzger U.,Neurochirurgische Klinik
Journal of Spinal Disorders and Techniques | Year: 2015

Study Design: A retrospective case series. Summary of Background Data: The authors present their experience with the ATHLET vertebral body replacement (VBR) system in combination with the TOSCA plating system for the treatment of cervical spondylotic myelopathy. Methods: Data obtained from 20 cases were reviewed. Corpectomy and VBR with the ATHLET system was performed in all cases. Patients underwent preoperative and postoperative assessment involving the Japanese Orthopedic Association score, Odom criteria, and radiographic studies to determine the position of the implant as well as cervical lordosis. The mean followup period was 20 months (16-28 mo). Results: Implantation of the ATHLET VBR itself was uncomplicated in all cases. The adjustment of the implants' height could be done in 2mm steps.With increasing height of the implant, the angle of lordosis increases comparable with physiological conditions. The authors performed 13 one-level and 7 two-level corpectomies; from the latter group there were 2 revision cases (10%) with implant dislocation. Four cases (20%) of secondary subsidence of the implant were observed radiographs 12 months postoperatively; in all cases treatment remained conservative. Ten patients (50%) had excellent, 4 (30%) good, 2 (10%) satisfactory, and 2 (10%) poor outcome according to Odom criteria. The average improvement of the Japanese Orthopedic Association score was 1.6. All cases achieved osseous fusion without complications, 55% of them had an improvement, and 15% of them had no change of the sagittal contour. Conclusions: The ATHLET VBR is easy to implant and avoids bone graft site morbidity. Due to a relatively high rate of secondary subsidence of the implant (20%) and secondary dislocation (10%) in combination to a poor to satisfactory outcome according to Odom criteria in 20%, the authors do not recommend the use of this PEEK implant for cervical VBR. © 2014 Wolters Kluwer Health, Inc.

Hempelmann R.G.,Neurochirurgische Klinik | Mater E.,Neurochirurgische Klinik | Schon R.,Neurochirurgische Klinik
European Spine Journal | Year: 2010

The conservative and operative treatment strategies of hematogenous spondylodiscitis in septic patients with multiple risk factors are controversial. The present series demonstrates the outcome of 18 elderly patients (median age, 72 years) with septic hematogenous spondylodiscitis and intraspinal abscess treated with microsurgical decompression and debridement of the infective tissue, followed by posterior stabilization and interbody fusion with iliac crest bone graft in one or two lumbar segments. The majority of the patients were unsuccessfully treated with intravenous antibiotics prior to the operation. Antibiotic therapy was continued for more than 6 weeks postoperatively. Morbidity and early mortality amounted to 50 and 17%, respectively. Three patients died in the hospital from internal complications after an initial postoperative improvement of the inflammatory clinical signs and laboratory parameters. Fifteen patients recovered from the spinal infection. Three of them died several months after discharge (cerebral hemorrhage, malignancy and unknown cause). Twelve patients had excellent or good outcomes during the follow-up period of at least 1 year. The series shows that operative decompression and eradication of the intraspinal and intervertebral infective tissue with fusion and stabilization via a posterior approach is possible in septic patients with multiple risk factors and leads to good results in those patients, who survive the initial severe stage of the septic disease. However, the morbidity and mortality suggest that this surgical treatment is not the therapy of first choice in high-risk septic patients, but may be considered in patients when conservative management has failed. © 2010 Springer-Verlag.

Konig S.A.,Neurochirurgische Klinik | Spetzger U.,Neurochirurgische Klinik
Acta Neurochirurgica | Year: 2014

Background: The authors describe their experience with a modified version of the standard technique of open-door laminoplasty for the surgical treatment of spondylotic myelopathy in elderly patients with temporary removal of the laminae, extensive decompression, and pre-plating of the laminae beyond the surgical field. Methods: Description of surgical anatomy, surgical technique, indications, limitations, complications, and specific perioperative considerations, as well as specific information to give to the patient about surgery and potential risks. A summary of ten key points is given. Conclusions: Transection of the laminae on both sides (temporary laminectomy) and pre-plating of the laminae outside of the surgical field has several advantages: better decompression of the spinal canal and the neuroforamina on both sides, easier undercutting of adjacent vertebral arches for cranio-caudal decompression, and no risk of spinal cord injury by the screwdriver when attaching plates to the laminae. © 2014 Springer-Verlag.

At present, modern skull base surgery is a highly sophisticated interdisciplinary collaboration of various diagnostic and therapeutic disciplines. The overall goal is the treatment of complex tumorous, traumatic, vascular and inflammatory processes or developmental disorders of the skull base with preservation of function. The paper presents modern concepts, procedures and minimally invasive strategies in skull base surgery and also critically discusses the current trend to endoscopic and robot-assisted surgical techniques. © 2011 Springer-Verlag.

Konig S.A.,Neurochirurgische Klinik | Spetzger U.,Neurochirurgische Klinik
Acta Neurochirurgica | Year: 2014

Background: The authors describe their experience with the choice of anterior, posterior and combined approaches for the surgical treatment of spondylotic myelopathy. Methods: Description of surgical anatomy, surgical technique, indications, limitations, complications, specific perioperative considerations and specific information to give to the patient about surgery and potential risks and a summary of 10 key points is given. Conclusions: If the disease extends behind the posterior vertebral body and if reestablishing spinal sagittal and coronal balance is an aim, then the anterior approach is the best choice. In cases of predominant posterior spinal cord compression and lordotic configuration the posterior approach should be preferred. Decompression of three or more levels, especially in combination with poor bone quality, requires a combined approach. © 2013 Springer-Verlag Wien.

Fischer S.,Neuroradiologische Klinik | Vajda Z.,Neuroradiologische Klinik | Perez M.A.,Neuroradiologische Klinik | Schmid E.,Neurologische Klinik | And 3 more authors.
Neuroradiology | Year: 2012

Introduction: The purpose of this study was to evaluate the safety and efficacy of the recently available flow diverter "pipeline embolization device" (PED) for the treatment of intracranial aneurysms and dissections. Methods: Eighty-eight consecutive patients underwent an endovascular treatment of 101 intracranial aneurysms or dissections using the PED between September 2009 and January 2011. The targeted vessels include 79 (78%) in the anterior circulation and 22 (22%) in the posterior circulation. We treated 96 aneurysms and 5 vessel dissections. Multiple devices were implanted in 67 lesions (66%). Results: One technical failure of the procedure was encountered. Immediate exclusion of the target lesion was not observed. Angiographic follow-up examinations were carried out in 80 patients (91%) with 90 lesions and revealed complete cure of the target lesion(s) in 47 (52%), morphological improvement in 32 lesions (36%), and no improvement in 11 lesions (12%). Six major complications were encountered: one fatal aneurysm rupture, one acute and one delayed PED thrombosis, and three hemorrhages in the dependent brain parenchyma. Conclusion: Our experience reveals that the PED procedure is technically straightforward for the treatment of selected wide-necked saccular aneurysms, fusiform aneurysms, remnants of aneurysms, aneurysms with a high likelihood of failure with conventional endovascular techniques, and dissected vessels. While vessel reconstruction, performed after dissection, is achieved within days, remodeling of aneurysmal dilatations may take several months. Dual platelet inhibition is obligatory. Parenchymal bleeding into brain areas dependent on the target vessel is uncommon. © The Author(s) 2011.

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