V. Beneš

Military University Hospital Prague, Praha, Praha, Czech Republic

Are you V. Beneš?

Claim your profile

Publications (77)32.41 Total impact

  • David Netuka · Václav Masopust · Martin Májovský · Vladimír Beneš

    No preview · Chapter · Nov 2015
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Objectives: Alzheimer's disease (AD) and normal pressure hydrocephalus (NPH) are both associated with cognitive decline and ventriculomegaly. While promising approach in differentiating between the two diseases, only a few diffusion tensor imaging (DTI) studies compared directly NPH and AD patients. The current study compares global whitematter (WM) alterations in AD and NPH addressing some of the methodological issues of previous studies. Patients and methods: Diffusion tensor images were obtained from 17 patients with NPH, 14 with AD, and 17 healthy controls. White matter integrity was quantified by fractional anisotropy (FA), mean (MD), axial (λ1) and radial diffusivity (RD). The diffusion parameters were compared between the groups in 'skeletonised' tracts representing the core of the fibre bundles. Results: Reduced FA was found in NPH patients throughout the corpus callosum, particularly in the splenium, along with increased RD. On the other hand, FA, MD and RD were higher in NPH in the cortico-fugal fibres arising from the frontal and parietal cortex. While no FA changes were detected in AD patients compared to controls, widespread increased RD was observed. When comparing NPH and AD patients, higher FA, MD and RD was observed in the corona radiata in the periventricular fibres arising from the frontal and parietal cortex in NPH patients. The ventricular volumes were correlated with diffusivity parameters in the tracts next to the ventricles in AD and NPH patients. Conclusion: Our analysis identified a pattern of WM diffusion alterations that can differentiate NPH patients from controls and AD patients.
    Full-text · Article · Nov 2015 · Clinical neurology and neurosurgery
  • Source
    Martin Majovsky · Vaclav Masopust · Vladimir Beneš
    [Show abstract] [Hide abstract]
    ABSTRACT: Introduction: Carpal tunnel syndrome is the most common entrapment neuropathy. It is a cause of serious decrease of quality of life with considerable socioeconomic impact. Treatment of choice in moderate and severe carpal tunnel syndrome is surgery. Methods: Surgical results of 96 consecutive patients after 129 operations were analyzed. Procedure was performed under local anaesthesia with classic open technique. Objective and subjective symptoms were examined at one-year follow-up. Results: Neither neural, nor vascular injury occurred in our series. 3% of patients had superficial wound infection with no need for revision surgery. Over 95% of patients show permanent improvement of subjective complaints. Conclusion: Open carpal tunnel release is a golden standard in surgical treatment of carpal tunnel syndrome with high success rate and minimum complications. Overall satisfaction with procedure is more than 97%.
    Full-text · Article · Sep 2015 · Praktický lékar̆
  • Source
    Martin Majovsky · David Netuka · Václav Masopust · Vladimír Beneš
    [Show abstract] [Hide abstract]
    ABSTRACT: INTRODUCTION:Clivus is a central structure of the skull base located in the vicinity of the brainstem and vital brain vessels. Clival fractures are usually caused by a high-energy trauma. Cerebrospinal fluid leak is one of the most common complications. CASE REPORT: A middle-aged male sustained a mild head trauma, followed by a nasal cerebrospinal fluid leak. CT scan revealed the massive pneumocephalus and the fracture of the clivus in the posterior wall of the sphenoidal sinus. We performed an endoscopic endonasal surgery to seal the defect. DISCUSSION: Pneumatization of a sphenoidal sinus shows high variability. In the presented case, extreme pneumatization of the sinuses was combined with the gracile clivus, which was the predisposing factor for fracture. Traumatic cerebrospinal fluid leak carries the risk of intracranial hypotension and meningitis. Microscopic transseptal management is the classical surgical approach, while endoscopy provides the modern miniinvasive option. CONCLUSION: Endoscopic endonasal treatment of traumatic cerebrospinal fluid leak is the treatment of choice for the clival fractures
    Full-text · Article · Aug 2015 · Rozhledy v chirurgii: měsíčník Československé chirurgické společnosti
  • P. Vaněk · M. Votavová · S. Ostrý · V. Beneš · K. Pavelka
    [Show abstract] [Hide abstract]
    ABSTRACT: PURPOSE OF THE STUDY The aim of the study is to present the technique of pedicle subtraction osteotomy (PSO) of the seventh cervical vertebra (C7) for correction of rigid kyphotic deformity of the cervicothoracic junction (C/Th) in patients with severe ankylosing spondylitis (AS).. MATERIAL AnD METHODS The PSO technique for correction of rigid deformity of the C/Th spine was used in fie patients with the aim to restore their ability of horizontal vision. The follow-up in all patients lasted two years at least. Clinical assessment of treatment results was based on the patients' neurological status and their satisfaction with the correction achieved. Improvement in a vertical 2) line of sight was evaluated using the angle measured between the forehead-chin line and the vertical (FCv angle) in a lateral view photograph of the standing patient. The achieved correction of kyphotic deformity was assessed by comparing the pre-operative Cobb's angle between the second cervical and the fourth thoracic vertebra with the post-operative one. RESULTS The average operative time was 4 hours (range, 3.5 to 5 h). The average blood loss was 1600 ml (range, 800 to 2100 ml). On the average, the FCv angle was reduced by 45.2° and Cobb's angle was corrected) by 54.6°. All patients were satisfid with the degree of correction achieved and reported alleviation of neck pain. none of the patients showed any signifiant loss of correction or neurological deterioration at two-year follow-up. DISCUSSIOn The theoretical and technical principles of corrective osteotomy at the C7 level performed for rigid kyphotic deformity of the spine at the C/Th junction are presented in our group of patients. Our results give support to the superiority of instrumented PSO used currently over the previous techniques. In accordance with the relevant literature data, attention is drawn to a relatively higher risk of this procedure in comparison with corrective surgery performed at the other spinal levels. COnCLUSIOnS Corrective osteotomy of a rigid kyphotic deformity at the C/Th spine level in AS patients involves a complex reconstructive surgical procedure. The PSO technique reduces the risk of injury to the visceral structures ventral to the spine, and provides optimal conditions for bone healing at the site of vertebral body resection. If the patient heals well, a successful PSO procedure will markedly improve the quality of his/her life. Key words: corrective osteotomy, cervicothoracic, kyphosis, ankylosing spondylitis.
    No preview · Article · Dec 2014 · Acta chirurgiae orthopaedicae et traumatologiae Cechoslovaca
  • S. Ostrý · T. Belšan · J. Otáhal · V. Beneš · D. Netuka

    No preview · Article · Jun 2014 · Clinical Neurophysiology
  • V Masopust · D Netuka · V Beneš
    [Show abstract] [Hide abstract]
    ABSTRACT: Introduction: We reviewed our results in order to evaluate safety of endoscopic endonasal technique in the treatment of craniopharyngiomas. Material and methods: Since 2008, endoscopic endonasal approach was used in 14 patients with typical suprasellar extraventricular craniopharyngioma. This cohort consisted of 11 males and three females (age 17 to 60 years, average age 38 years). Eleven patients had preoperative visual field deficit ranging from small deficit in the outer quadrant to blindness on one eye and a severe deficit of the second eye. Endoscopic endonasal four hands technique was used with intraoperative 3.0 T MRI. Results: In seven cases, the radical resection was achieved. Subtotal resection was performed in four cases. The resection was partial in two cases. In one case, a cyst was drained. Resection after iMRI was performed in three cases. Visual field deficit improved in five cases. Postoperative diabetes insipidus developed in three cases. Reoperation for CSF leakage was necessary in three cases. Conclusion: Endoscopic technique in the treatment of craniopharyngioma is safe. However, this approach is associated with a risk postoperative cerebrospinal fluid leakage. Key words: craniophyryngioma – endonasal endoscopic technique – intraoperative magnetic resonance
    No preview · Article · May 2014 · Ceska a Slovenska Neurologie a Neurochirurgie
  • S. Ostrý · T. Belšan · J. Otáhal · V. Beneš · D. Netuka

    No preview · Article · May 2014 · Clinical Neurophysiology
  • V. Masopust · R. Rokyta · V. Beneš
    [Show abstract] [Hide abstract]
    ABSTRACT: Neuromodulation is a process in which several classes of neurotransmitters in the nervous system regulate diverse populations of neurons. Neuromodulation in neurosurgery is a process in which artificial devices manage the nervous system. The main neuromodulatory methods for the treatment of chronic pain are described. These include traditional neurostimulation methods, such as peripheral subcutaneous field stimulation (PSFS), peripheral nerve stimulation (PNS), spinal cord stimulation (SCS), occipital nerve stimulation (ONS) and motor cortex stimulation (MCS) as well as non-invasive methods, such as transcutaneous electric stimulation (TENS), repetitive transcranial magnetic stimulation (rTMS), and drugreleasing therapy - programmable pumps. For each method, its history, pathophysiology, indications, description of the procedure, complications and outcomes are described.
    No preview · Article · Jan 2014 · Ceska a Slovenska Neurologie a Neurochirurgie
  • Source
    Martin Májovský · David Netuka · Ondrej Bradác · Vladimír Beneš
    [Show abstract] [Hide abstract]
    ABSTRACT: Aim: The aim of the study is to present surgical outcome of treatment of supratentorial cavernous malformation of the brain at the Department of Neurosurgery, Charles University and the Central Military Hospital in Prague. Material and methods: We retrospectively en‐ rolled patients diagnosed between 2000 and 2012 with supratentorial, cortico‐subcortically located cavernoma. We analysed epidemiological and radiological data, clinical presenta‐ tion and surgical results including complications. Results: Initial symptoms included epileptic seizure (49%), headache (22%) and focal neurological deficit (19%); 15% of cavernomas were found incidentally. Radiological signs of recent haemorrhage on MR scans were found in 27% patients. We performed surgery in 145 patients with 158 cavernous malformations. Twenty five lesions were treated conservatively. Surgical complications occurred in 8% of patients. One patient died and one had permanent neurological deficit attributable to sur‐ gery. Postoperative seizure rate was significantly higher in a group with wound infection or postoperative hematoma (p < 0.05). Conclusion: Microsurgical resection of lobar cavernoma is relatively safe procedure with minimal morbidity and mortality. Postoperative hematoma or wound infection might have an epileptogenic potential.
    Full-text · Article · Jan 2014 · Ceska a Slovenska Neurologie a Neurochirurgie
  • [Show abstract] [Hide abstract]
    ABSTRACT: Study aim: Endoscopic technique enables endonasal surgery of non-pituitary skull base lesions. Several cases of endonasal resection of the skull base meningiomas have been described. Methods and material: At our institution, 614 endoscopic endonasal procedures were performed untill June 2012. Intraoperative MRI was performed in 409 cases. We conducted an analysis of all endoscopic endonasal procedures for the skull base meningioma with a minimum follow-up of 6 months. Results: Between 2/2008 and 3/2012, 11 surgeries for skull base meningioma were performed. Olfactory meningioma was treated endonasally in 3 cases, sellar or parasellar meningioma in 8 cases. The goal of the surgery in 7 cases was radical resection of meningioma. Resection Simpson 1 was achieved in 6 cases (86%). Partial/subtotal resection was planned and performed in 2 cases. Biopsy of the tumor was planned and performed in 2 cases. No postoperative neurological deficit, hypopituitarism or diabetes insipidus were observed. Preoperatively, a total of 5 patients had visual field deficit. Postoperative worsening was not observed, deficit was stable after surgery in 1 case and it improved to normal in 4 cases. Postoperative cerebrospinal leakage led to repeated surgery in 2 cases (18%). Postoperative cerebrospinal leakage did not cause any morbidity when evaluated 30 days after surgery. Conclusions: Endonasal endoscopic resection of the skull base meningiomas in selected cases at centres with extensive experience with endoscopic endonasal surgery represents an alternative technique to transcranial surgery. Higher risk of postoperative cerebrospinal leakage represents a disadvantage of endoscopic technique. It also needs to be considered that the patients who underwent this procedure have so far had a shorter follow-up. Absence of any brain retraction and potentially lower risk of postoperative vision deterioration represent advantages of the endonasal technique.
    No preview · Article · Jan 2013 · Ceska a Slovenska Neurologie a Neurochirurgie
  • K. Saur · S. Ostrý · P. Vaněk · T. Belšán · V. Beneš
    [Show abstract] [Hide abstract]
    ABSTRACT: The authors present a case of a 38-year-old patient with progressive Brown-Séquard neurodeficit. Idiopathic spinal cord herniation at the spine level Th5 was identified as the main cause. Surgical reposition of the spinal cord and closure of the dural defect led to gradual clinical improvement. Improvement was observed in clinical as well as electrophysiological picture.
    No preview · Article · Jan 2013 · Ceska a Slovenska Neurologie a Neurochirurgie
  • [Show abstract] [Hide abstract]
    ABSTRACT: Background: Various approaches have been described and used for operating on lesions in the orbit. The approach selection is based on the pathology in the orbit and its exact location. This study was performed to evaluate the endoscopic endonasal approach (EEA) for orbital lesions and application of intraoperative MRI (iMRI). Methods: Since 2006, the present authors have performed 614 endoscopic endonasal procedures. iMRI was used in 409 of these cases. Three orbital lesions approached via the endonasal route with a minimum follow-up of 1 year were analysed. Results: EEA was used in one case of intraconal cavernoma, one extraconal cavernoma and one solitary fibrous tumour in the orbit. The lesion was located medially to the optic nerve in all cases. Radical resection was achieved and the patient's vision was improved in two cases with a preoperative visual field deficit. iMRI was useful in two cases. In one case intraoperative MRI helped to find an intraconal lesion; in the other case iMRI led to evacuation of haemostatic material and blood, which was causing compression in the orbit. Conclusions: The EEA should be considered whenever a lesion in the orbit is located medially to the optic nerve. Excellent results were achieved. iMRI proved useful in selected cases.
    No preview · Article · Dec 2012 · Acta Neurochirurgica
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: Bobble-head doll syndrome (BHDS) is a complex syndrome with the dominant symptom of repetitive anteroposterior head movement. Only 57 patients are quoted in the literature. The etiology of this syndrome remains unknown and no standard treatment has yet been established. We hereby report four cases treated at our department. All the patients presented a psychomotor retardation due to an obstructive hydrocephalus. All the patients were treated using neuroendoscopic techniques: two with ventriculocystostomy, and two with ventriculocystocisternostomy. Cyst decompression was achieved in all four cases and clinical recovery was evident in three of the four patients observed. After surgery, BHDS persisted longer the more the subsequent treatment was delayed. In this article, we provide a concise overview of the theories of pathogenesis, presentation, and management of this syndrome. Based on our own experience, we state that the method of choice should be the neuroendoscopy and this must be performed promptly after diagnosis is made.
    Full-text · Article · Aug 2012 · Acta Neurochirurgica
  • D. Netuka · V. Masopust · V. Beneš

    No preview · Article · Jun 2012 · Journal of Neurological Surgery, Part B: Skull Base
  • [Show abstract] [Hide abstract]
    ABSTRACT: Introduction: From the histological point of view, most meningiomas are benign tumours. Nevertheless, their recurrence is quite frequent, and identifying the risk factors for recurrent disease is of utmost importance. Material and methods: Prospective study, patients operated on in the period 2/2008-9/2009. Inclusion criteria for enrolment into the study: age 18-70 years, good health status, and previously untreated solitary intracranial meningioma. Evaluation of clinical, surgical, MRI findings and vascular endothelial growth factor serum levels (prior to procedure, 3 months after, 12 months after, 24 months after procedure and at the time of the last follow-up in 11/2011) was performed. Immunohistochemical analysis of histological samples was carried out. Further treatment (wait and see, redo surgery, treatment with radiation using the Leksell Gamma Knife, external radiotherapy) was recorded in case of a positive follow-up MRI finding (recurrent disease, progression of residual tumour). Results: A total of 50 consecutive patients (34 women and 16 men) were included into the study. Average age at the time of surgery was 59.2 years (range 27-75 years). Radical resection with no residual tumour left was achieved in 35 cases. Histological analysis showed grade I meningioma in 45 cases and grade II (atypical) meningioma in 5 cases. Correlation between E-cadherin expression and recurrent meningioma was proved by immunohistochemical examinations; in the remaining investigations, however, such a correlation was not found. No correlation was detected between the serum vascular endothelial growth factor level and the expression of vascular endothelial growth factor in immunohistochemical investigation. A correlation was found between the expression of vascular endothelial growth factor in immunohistochemical investigation and peritumoural oedema. The tumour recurred in 5 cases. Conclusions: On the basis of our results as well as literature findings we can conclude that all the patients after meningioma surgery need to be carefully followed for the rest of their life by repeated MRI invetigations.
    No preview · Article · Jun 2012 · Rozhledy v chirurgii: měsíčník Československé chirurgické společnosti
  • Source
    Svatopluk Ostrý · David Netuka · Vladimír Beneš
    [Show abstract] [Hide abstract]
    ABSTRACT: The resection of convexity meningiomas should harbour a low rate of morbidity. Functional preservation should be the main goal of surgery and have higher priority over radicality. Involvement of the primary motor cortex (PMC) increases surgical risk. The goal of this study was to evaluate the effect of cortical mapping on surgical morbidity after rolandic area meningioma treatment. From January 2005 to March 2011, 42 patients were operated on for rolandic meningioma involving or compressing the PMC. The cohort consisted of 25 (59.5%) convexity, 10 (23.8%) parasagittal and 7 (16.7%) falcine meningiomas. Four patients were treated for recurrent disease and 25 (59.5%). Intraoperative cortical mapping was used to identify location of PMC. The threshold stimulation current was set at every site of cortical monopolar anodal stimulation around the tumour and at the tumour-cortex junction repeatedly during the meningioma dissection. Radical resection (Simpson 1 and 2) was achieved in 30 patients (71.4%) and partial resection (Simpson 4) in 12 (28.6%). New permanent deficit occurred in three patients (7.1%). All patients had moderate preoperative deficit (muscle strength ≤ 3). WHO-I was in 28 cases (66.7%), WHO-II in 14 cases (33.3%). Average follow-up was 33.2 months. Five patients (11.9%) suffered from recurrence after an average of 23.8 months. Rolandic area meningiomas should be classified as a higher risk group. Intraoperative cortical mapping is in our experience useful in a situation when the cleavage plane at the PMC is lost. In such a scenario, resection outside the PMC is radical and only at the PMC is a thin remnant left without cortical damage, which helps to be safer with a better long-term prognosis.
    Full-text · Article · Mar 2012 · Acta Neurochirurgica
  • [Show abstract] [Hide abstract]
    ABSTRACT: This prospective study investigated whether surgery or endovascular treatment for unruptured intracranial aneurysms (UIAs) affects cognitive functions. Four neuropsychological variables from an Auditory Verbal Learning Test (overall capacity of verbal memory and delayed recall) and a Trail Making Test (psychomotor speed and cognitive flexibility) were investigated before and 1 year after treatment for UIAs in 65 patients < 61 years of age. This cohort consists of 15 men and 50 women aged 15-60 (mean age 44.9) years. Group-rate analysis showed a non-significant increase in post-treatment scores in the four neuropsychological variables. In addition, no significant differences were found between the surgical clipping (SC) and endovascular coiling (EC) group. Event-rate analysis demonstrated that two patients from the EC and one from the SC group developed cognitive impairment after treatment. Surgical and endovascular repair for UIAs do not impair cognition in patients without postoperative restrictions in lifestyle.
    No preview · Article · Jan 2012 · British Journal of Neurosurgery
  • [Show abstract] [Hide abstract]
    ABSTRACT: Verbal memory is an essential cognitive ability with scope for adequate treatment of information and for orientation in everyday life. Our study is centered on memory performance in the wake of treatment for ruptured intracranial aneurysm. Three psychological tests were performed: (1) within a month of the neurosurgical intervention, (2) 1 year and (3) 5-7 years after the ruptured aneurysm treatment. Under comparison are the overall results of tests for verbal memory capacity in a cohort of patients (N = 59) and in the control group. Three post-treatment measurements revealed a persistent deficit of verbal memory. The cohort's average performance improved from -1.3 SD (standard deviation) below the average of the norm to -0.5 SD below the norm at the second test 1 year after treatment, while at the third test the deficit had worsened to -0.68 SD. Similarly, testing for long-term recovery at 5-7 years postoperatively showed the patients' performances to be 2/3 SD below the average of the general population. The results of the study imply the need for long-term rehabilitation of memory in this particular group of patients.
    No preview · Article · Dec 2011 · Acta Neurochirurgica
  • Source
    [Show abstract] [Hide abstract]
    ABSTRACT: The aim of this article is to describe the feasibility of performing intraoperative MR imaging in patients with spinal cord lesions and the potential value of this technique. The authors report a case involving a 28-year-old man who presented with chronic cervical pain and pain along the ulnar side of the forearms during neck flexion. Findings on clinical examination were normal, but MR imaging revealed a multicystic cervical spinal cord lesion. Surgery was undertaken to open the cysts, evacuate old blood, and search for pathological tissue. Intraoperative MR imaging showed that the caudal cyst was not opened, and surgery was therefore continued. The caudal cyst was fenestrated and a suspected small cavernous malformation was removed. Electrophysiological monitoring was performed both before and after the intraoperative MR imaging. The use of intraoperative MR imaging changed the strategy of the procedure and helped the surgeon to safely enter all the cysts in the cervical cord.
    Preview · Article · Mar 2011 · Journal of neurosurgery. Spine

Publication Stats

90 Citations
32.41 Total Impact Points

Institutions

  • 2009-2014
    • Military University Hospital Prague
      Praha, Praha, Czech Republic
  • 2008-2014
    • Charles University in Prague
      • Department of Neurosurgery
      Praha, Praha, Czech Republic
  • 2001-2011
    • The Police Academy of the Czech Republic in Prague
      Praha, Praha, Czech Republic