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  • Journal of Neurosurgery Publishing Group (JNSPG)  (4)
  • Scholz, Martin  (4)
  • 1
    Online Resource
    Online Resource
    Subsidence of the Wing titanium cage after anterior cervical interbody fusion: 2-year follow-up study
    Journal of Neurosurgery Publishing Group (JNSPG) ; 2006
    In:  Journal of Neurosurgery: Spine Vol. 4, No. 6 ( 2006-06), p. 447-453
    Details
    In: Journal of Neurosurgery: Spine, Journal of Neurosurgery Publishing Group (JNSPG), Vol. 4, No. 6 ( 2006-06), p. 447-453
    Abstract: Cage subsidence occurs after anterior cervical discectomy and fusion (ACDF). The aim of this prospective study was to evaluate subsidence and total segmental height after implantation of a newly designed Wing titanium cage. Furthermore, alignment of the entire cervical spine was analyzed 2 years after surgery. Methods Fifty-four patients (26 women and 28 men) whose mean age was 48.3 years underwent ACDF. Follow-up examinations were performed at discharge and 6, 12, and 24 months postoperatively by an independent investigator. The clinical course was evaluated using the visual analog pain scale and the Prolo scales. Measurements of subsidence and total segmental height were conducted, and the alignment of the entire cervical spine was classified using two methods. In 54 patients 64 levels were fused. The patients noted a significant reduction of pain, and scores on both Prolo scales were significantly improved. At the 2-year follow-up examination, subsidence was present in 30 of the 67 fused segments. There was a statistically significant correlation between subsidence and the presence of posterior spondylosis at the initial surgery. Furthermore, there was a significant correlation between reduction of total segmental height and the presence of subsidence; however, subsidence did not prevent the development of a solid bone arthrodesis (fusion rate 98%) or have an adverse effect on the alignment of the cervical spine. Conclusions Titanium Wing cage–augmented ACDF was associated with comparatively good long-term results. Subsidence was present but did not cause clinical complications. Furthermore, radiological studies demonstrated that the physiological alignment of the cervical spine was preserved and a solid bone arthrodesis was present at 2 years after surgery.
    Type of Medium: Online Resource
    ISSN: 1547-5654
    URL: Article
    DOI: 10.3171/spi.2006.4.6.447
    RVK:
    XA 55270.1
    Language: Unknown
    Publisher: Journal of Neurosurgery Publishing Group (JNSPG)
    Publication Date: 2006
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  • 2
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    Online Resource
    Comparison of two algorithms for the application of real-time image mosaicking in neuroendoscopy : Laboratory investigation
    Journal of Neurosurgery Publishing Group (JNSPG) ; 2014
    In:  Journal of Neurosurgery Vol. 121, No. 3 ( 2014-09), p. 688-699
    Details
    In: Journal of Neurosurgery, Journal of Neurosurgery Publishing Group (JNSPG), Vol. 121, No. 3 ( 2014-09), p. 688-699
    Abstract: Neuroendoscopy is used more and more frequently in neurosurgical procedures and has become an important tool in the neurosurgical armamentarium. However, the main restriction of neuroendoscopy is the limited field of view. A better overview of the area of interest would increase surgical safety and decrease procedure-related morbidity rates. In the present study, the authors aimed to improve this restriction by using and comparing two algorithms to create endoscopic panoramic images, which increase the field of view during neuroendoscopic procedures. Methods Different endoscopic methods with or without a stand and with linear or circular endoscope movements were performed in cadaveric ventricles. Video of the endoscopy was used to create image mosaics of the lateral ventricle with the help of the Kourogi or LogSearch (LS) algorithm. In the LS algorithm, different template sizes were used. Three observers graded the quality of the image mosaic in terms of usefulness in surgery. The fastest frame rate was 3–4 frames/second. Results The LS algorithm with a larger template size showed significantly better results for the creation of image mosaics than the Kourogi algorithm in linear endoscopic movement with or without a stand. In circular endoscopic movements, the results seemed to be better with the LS algorithm but were not significantly different from those obtained with the Kourogi algorithm. In summary, image quality in the experimental paradigms was satisfying. Conclusions Results in the study showed that the creation of image mosaics is possible and reliable with the featured algorithms. Image mosaicking is an applicable device for neuroendoscopy and can increase the field of view during endoscopic procedures. Its use can increase the safety and the field of application of neuroendoscopy. However, faster frame rates will be required to create a smooth image for practical use during surgery.
    Type of Medium: Online Resource
    ISSN: 0022-3085 , 1933-0693
    URL: Article
    DOI: 10.3171/2014.5.JNS121788
    RVK:
    XA 10000
    RVK:
    XA 55270
    Language: Unknown
    Publisher: Journal of Neurosurgery Publishing Group (JNSPG)
    Publication Date: 2014
    detail.hit.zdb_id: 2026156-1
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  • 3
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    Online Resource
    Lhermitte—Duclos disease as a component of Cowden's syndrome : Case report and review of the literature
    Journal of Neurosurgery Publishing Group (JNSPG) ; 1999
    In:  Journal of Neurosurgery Vol. 90, No. 4 ( 1999-04), p. 776-779
    Details
    In: Journal of Neurosurgery, Journal of Neurosurgery Publishing Group (JNSPG), Vol. 90, No. 4 ( 1999-04), p. 776-779
    Abstract: ✓ In recent years, 16 cases involving the association between Lhermitte—Duclos disease (LDD), which is a hamartomatous overgrowth of cerebellar tissue, and Cowden's syndrome (CS), an autosomal-dominant condition characterized by multiple hamartomas and neoplasias, have been reported. LDD may be one of the manifestations of CS. Recently, mutations of the PTEN/MMAC 1 gene, a tumor suppressor gene, have been found in families with CS, including four patients in whom LDD was diagnosed. The authors present a case of LDD in a 53-year-old woman who also had the typical mucocutaneous lesions found in CS, as well as goiter and intestinal polyposis. In this case, CS had never been suspected until the diagnosis of LDD was made. The mutation detected in the PTEN/MMAC 1 gene as well as neuropathological results are described.
    Type of Medium: Online Resource
    ISSN: 0022-3085
    URL: Article
    DOI: 10.3171/jns.1999.90.4.0776
    RVK:
    XA 10000
    RVK:
    XA 55270
    Language: Unknown
    Publisher: Journal of Neurosurgery Publishing Group (JNSPG)
    Publication Date: 1999
    detail.hit.zdb_id: 2026156-1
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  • 4
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    Online Resource
    Virtual image navigation: a new method to control intraoperative bleeding in neuroendoscopic surgery : Technical note
    Journal of Neurosurgery Publishing Group (JNSPG) ; 2000
    In:  Journal of Neurosurgery Vol. 93, No. 2 ( 2000-08), p. 342-350
    Details
    In: Journal of Neurosurgery, Journal of Neurosurgery Publishing Group (JNSPG), Vol. 93, No. 2 ( 2000-08), p. 342-350
    Abstract: ✓ In this neuroendoscopic study the authors tested the newly developed “red-out module” of their visual navigation system that enables the neurosurgeon to achieve hemostasis if total visualization is lost due to hemorrhage (“red out”) within the visual field. An optical position measurement system connected to the endoscope guarantees that digitized endoscopic images are coupled with the accurate endoscopic position. Computerized images are simultaneously stored with their respective position data, and this creates a virtual anatomical landscape. The system was tested in in vivo bleeding conditions in a rat model. Artificial endoscopic cavities were created in the inguinal, pelvic, and jugular regions in rats to imitate the conditions of the human ventricular system. Two experimental settings were tested: Technique I, in which a computer landmark has been previously determined at the point where the vessel will be lesioned; and Technique II, in which a landmark has been previously set in the surrounding area of the vessel. Immediately after hemorrhage obscures the visual field (red out), the computer automatically displays the virtual images on a separate monitor. The previously set landmarks and the graphic overlay of the coagulation fiber enable the surgeon to navigate within the operative field based on the virtual images and to perform coagulation at the site of the lesion. A total of 175 vessels were coagulated: 43 arteries and 132 veins. In using Technique I, 130 (90.9%) of 143 vessels and in using Technique II, 26 (81.2%) of 32 arteries were successfully coagulated. The authors' data revealed that virtual image guidance has the potential to be a helpful tool in neuroendoscopy.
    Type of Medium: Online Resource
    ISSN: 0022-3085
    URL: Article
    DOI: 10.3171/jns.2000.93.2.0342
    RVK:
    XA 10000
    RVK:
    XA 55270
    Language: Unknown
    Publisher: Journal of Neurosurgery Publishing Group (JNSPG)
    Publication Date: 2000
    detail.hit.zdb_id: 2026156-1
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