Minimally Invasive Endoscopic and Endoscopy-Assisted Microsurgery of Vestibular Schwannoma

Betka, Jan; Chovanec, Martin; Zvĕrina, E; Profant, Oliver; Lukeš, Petr; Skrivan, J; Kluh, Jan; Fík, Zdeněk

doi:10.5772/23793

Cited by 2 publications

(3 citation statements)

References 84 publications

(158 reference statements)

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“…That is to say, there exists a great amount of Brønsted basic sites on the pore surface of such a mesoporous NiFe 2 O 4 support. There have been many reports that palladium on basic support materials may exhibit an increased catalytic activity for Heck and Suzuki reactions, compared to that of acidic support materials. − The stronger basicity of the catalyst support would lead to the higher electronic density on the catalyst Pd surface and accelerate the formation of active radical ligand ArPd II X (ArPd II X represents activated component α′ in the composite catalyst α′/β); that is, it facilitates such an oxidative addition reaction. It has been reported that the σ donor ligands such as phosphines coordinated to palladium could promote the oxidative addition step by their strong electron donating capability, while π acceptors such as CO and alkenes tend to prohibit this oxidation step.…”

Section: Synergetic Catalytic Effectsmentioning

confidence: 99%

On the Synergetic Catalytic Effect in Heterogeneous Nanocomposite Catalysts

2012

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Section: Synergetic Catalytic Effectsmentioning

confidence: 99%

On the Synergetic Catalytic Effect in Heterogeneous Nanocomposite Catalysts

2012

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“…The wide variance in the success of hearing preservation during surgery (17–100% for smaller tumors) is due, among other things, to the characteristics of the tumor, the type of surgical approach, and the experience of the workplace (2).…”

Section: Discussionmentioning

confidence: 99%

“…In general, the success rate of hearing preservation decreases with increasing tumor volume, and in numbers, it differs from 17–100% for small tumors to 5–53% for larger tumors (2).…”

Section: Introductionmentioning

confidence: 99%

Hearing After Vestibular Schwannoma Surgery: Is It Preserved Forever?

Fík¹,

Zvĕrina²,

Lisý

et al. 2023

Otol Neurotol

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Introduction: Currently, it is possible to preserve the auditory nerve in a large number of cases, but the preservation of the hearing itself is unpredictable. Apart from wait and scan strategy and stereoradiotherapy, hearing after vestibular schwannoma surgery is considered to remain stable even in long-term follow-up. Materials and Methods: Twenty-eight patients had preserved hearing after retrosigmoid suboccipital microsurgery of the vestibular schwannoma between 2008 and 2014. A standard audiological protocol was performed together with an magnetic resonance imaging evaluation of the fluid content of the inner ear. Results: The mean difference in pure-tone average between the direct and final postsurgical examination was 12.758 dB ( p = 2.5E − 06). The word recognition score deteriorated by 17.45% ( p = 0.03516). The mean American Academy of Otolaryngology-Head and Neck Surgery score on the second examination was 2.5, and that on the second examination was 3.111 ( p = 0.00483). There was no significant deterioration in the healthy ear.The signal intensity ratio in the basal turn of the cochlea increased by an average of 0.13 points ( p < 0.05). Patients with persistent tumor or nodular enhancement in the internal acoustic meatus deteriorated significantly in hearing according to the American Academy of Otolaryngology-Head and Neck Surgery scale compared with patients without any finding in the meatus ( p = 0.01299). Conclusions: There is a discrete but gradual deterioration of the hearing in the postoperative period. Hearing impairment is more pronounced in patients with a nodular process in the internal acoustic meatus, regardless of whether it is growth active. After surgery, the pathological content of the inner ear normalizes (evaluated on T2 magnetic resonance imaging sequences).

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Minimally Invasive Endoscopic and Endoscopy-Assisted Microsurgery of Vestibular Schwannoma

Cited by 2 publications

References 84 publications

On the Synergetic Catalytic Effect in Heterogeneous Nanocomposite Catalysts

On the Synergetic Catalytic Effect in Heterogeneous Nanocomposite Catalysts

Hearing After Vestibular Schwannoma Surgery: Is It Preserved Forever?

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