The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform
Daniel K. Riew - One of the best experts on this subject based on the ideXlab platform.
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quantitative and qualitative analyses of spinal canal encroachment during cervical laminectomy using the kerrison Rongeur versus high speed burr
British Journal of Neurosurgery, 2019Co-Authors: James D. Lin, Lee A. Tan, Alexander Tuchman, Hao Zhang, Kai Ren, Daniel K. RiewAbstract:Background: Several cervical laminectomy techniques have been described. One commonly used method involves making bilateral trough laminotomies using either a Kerrison Rongeur or a high speed burr,...
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Quantitative and qualitative analyses of spinal canal encroachment during cervical laminectomy using the kerrison Rongeur versus High-Speed burr
2019Co-Authors: James D. Lin, Lee A. Tan, Alexander Tuchman, Hao Zhang, Kai Ren, Daniel K. RiewAbstract:Background: Several cervical laminectomy techniques have been described. One commonly used method involves making bilateral trough laminotomies using either a Kerrison Rongeur or a high speed burr, and then removing the lamina en-bloc. Alternatively, some surgeons prefer to thin the lamina with the burr, and then remove the lamina in a piecemeal fashion using Kerrison Rongeurs. Some surgeons have warned against the potential risk of iatrogenic spinal cord injury from inserting the Kerrison footplate into a stenotic canal. We aim to quantify the amount of canal encroachment for various methods of cervical laminectomies. Methods: Three attending spine surgeons and two fellows each performed laminectomies using C5 sawbones models. The canal was completely filled with modeling putty to simulate a stenotic spinal cord. Bilateral trough laminotomies were performed using a 1 mm Kerrison, a 2 mm Kerrison, and a 3 mm matchstick high-speed burr. Piecemeal laminectomies were performed with a 2 mm Kerrison. A blinded spine surgery fellow performed all quantitative measurements. Three blinded researchers qualitatively ranked the amount of “canal encroachment”. Results: The average canal encroachment was 0.50 ± 0.45mm for the burr, 1.37 ± 0.68 mm for the 1 mm Kerrison, and 1.47 ± 0.37 mm for the 2 mm Kerrison (p = .002). There was a statistically significant difference between the burr and 1 mm Kerrison (p = .01) and between the burr and the 2 mm Kerrison (p = .001). There was no statistical difference between the 1 mm and 2 mm Kerrison (p = .78). The mean rank of the burr group, the Kerrison Rongeur group, and the piecemeal group were 1.41, 1.94, and 2.65, respectively, on an ordinal scale of 1–3. Conclusion: When performing a trough laminotomy, the high-speed burr results in less canal encroachment compared to 1 mm or 2 mm Kerrison Rongeurs. In the setting of a stenotic spinal canal, spine surgeons should consider using the burr to perform laminectomy to minimize the degree of canal encroachment.
Frank P.k. Hsu - One of the best experts on this subject based on the ideXlab platform.
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An endoscopic curved Kerrison Rongeur for spinal stenosis surgery.
Minimally invasive neurosurgery : MIN, 2002Co-Authors: E. H. Frank, J. Martin, Frank P.k. HsuAbstract:Objective: Adequate neural decompression with minimal structural alteration is the goal of lumbar stenosis surgery. Often because of limited visualization significant parts of the facet joints are removed enhancing the potential for developing instability. To overcome this problem we have developed a small curved Kerrison Rongeur that contains a 10000-pixel endoscope. This instrument allows one to visualize and decompress structures within the lateral recess that may have required more extensive removal of portions of the facet joints. Methods: Ten patients with symptomatic lumbar spinal stenosis were decompressed using the endoscopic Rongeur. Results: Compression of the lateral dura and nerve root by the facet and ligamentum could easily be identified. In all cases the ligament could be easily removed and the facet joint was undercut only enough to decompress the nerve. Conclusion: This instrument has the potential for less invasive decompression of spinal stenosis and further study of its utility is planned.
James D. Lin - One of the best experts on this subject based on the ideXlab platform.
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quantitative and qualitative analyses of spinal canal encroachment during cervical laminectomy using the kerrison Rongeur versus high speed burr
British Journal of Neurosurgery, 2019Co-Authors: James D. Lin, Lee A. Tan, Alexander Tuchman, Hao Zhang, Kai Ren, Daniel K. RiewAbstract:Background: Several cervical laminectomy techniques have been described. One commonly used method involves making bilateral trough laminotomies using either a Kerrison Rongeur or a high speed burr,...
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Quantitative and qualitative analyses of spinal canal encroachment during cervical laminectomy using the kerrison Rongeur versus High-Speed burr
2019Co-Authors: James D. Lin, Lee A. Tan, Alexander Tuchman, Hao Zhang, Kai Ren, Daniel K. RiewAbstract:Background: Several cervical laminectomy techniques have been described. One commonly used method involves making bilateral trough laminotomies using either a Kerrison Rongeur or a high speed burr, and then removing the lamina en-bloc. Alternatively, some surgeons prefer to thin the lamina with the burr, and then remove the lamina in a piecemeal fashion using Kerrison Rongeurs. Some surgeons have warned against the potential risk of iatrogenic spinal cord injury from inserting the Kerrison footplate into a stenotic canal. We aim to quantify the amount of canal encroachment for various methods of cervical laminectomies. Methods: Three attending spine surgeons and two fellows each performed laminectomies using C5 sawbones models. The canal was completely filled with modeling putty to simulate a stenotic spinal cord. Bilateral trough laminotomies were performed using a 1 mm Kerrison, a 2 mm Kerrison, and a 3 mm matchstick high-speed burr. Piecemeal laminectomies were performed with a 2 mm Kerrison. A blinded spine surgery fellow performed all quantitative measurements. Three blinded researchers qualitatively ranked the amount of “canal encroachment”. Results: The average canal encroachment was 0.50 ± 0.45mm for the burr, 1.37 ± 0.68 mm for the 1 mm Kerrison, and 1.47 ± 0.37 mm for the 2 mm Kerrison (p = .002). There was a statistically significant difference between the burr and 1 mm Kerrison (p = .01) and between the burr and the 2 mm Kerrison (p = .001). There was no statistical difference between the 1 mm and 2 mm Kerrison (p = .78). The mean rank of the burr group, the Kerrison Rongeur group, and the piecemeal group were 1.41, 1.94, and 2.65, respectively, on an ordinal scale of 1–3. Conclusion: When performing a trough laminotomy, the high-speed burr results in less canal encroachment compared to 1 mm or 2 mm Kerrison Rongeurs. In the setting of a stenotic spinal canal, spine surgeons should consider using the burr to perform laminectomy to minimize the degree of canal encroachment.
E. H. Frank - One of the best experts on this subject based on the ideXlab platform.
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An endoscopic curved Kerrison Rongeur for spinal stenosis surgery.
Minimally invasive neurosurgery : MIN, 2002Co-Authors: E. H. Frank, J. Martin, Frank P.k. HsuAbstract:Objective: Adequate neural decompression with minimal structural alteration is the goal of lumbar stenosis surgery. Often because of limited visualization significant parts of the facet joints are removed enhancing the potential for developing instability. To overcome this problem we have developed a small curved Kerrison Rongeur that contains a 10000-pixel endoscope. This instrument allows one to visualize and decompress structures within the lateral recess that may have required more extensive removal of portions of the facet joints. Methods: Ten patients with symptomatic lumbar spinal stenosis were decompressed using the endoscopic Rongeur. Results: Compression of the lateral dura and nerve root by the facet and ligamentum could easily be identified. In all cases the ligament could be easily removed and the facet joint was undercut only enough to decompress the nerve. Conclusion: This instrument has the potential for less invasive decompression of spinal stenosis and further study of its utility is planned.
Sow Aliou - One of the best experts on this subject based on the ideXlab platform.
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Seroprevalence of Toxoplasma gondii in commensal rodents sampled across Senegal, West Africa
'EDP Sciences', 2018Co-Authors: Brouat Carine, Diagne, Christophe Amidi, Ismaïl Khadija, Aroussi Abdelkrim, Dalecky Ambroise, Ba Khalilou, Kane Mamadou, Niang Youssoupha, Diallo Mamoudou, Sow AliouAbstract:International audienceRisks related to Toxoplasma gondii infection in humans remain poorly known in Senegal. Although rodent surveys could help to assess the circulation of T. gondii, they have seldom been set up in sub-Saharan Africa. The aim of this study was to examine Toxoplasma seroprevalence in rodents from villages and towns across Senegal. Rodents were sampled in 40 localities using a standardised trapping protocol. Detection of T. gondii antibodies was performed on 1205 rodents, using a modified agglutination test (MAT) technique. Seroprevalence data were analysed depending on geography, the local rodent community, and individual characteristics of the rodent hosts. We found 44 seropositive rodents from four different species (Mastomys erythroleucus, Mastomys natalensis, Mus musculus domesticus, Rattus rattus). Toxoplasma seroprevalence was low, averaging 4% in the localities. Higher Toxoplasma seroprevalence (up to 24%) was found in northern Senegal, a region known to be the heart of pastoral herding in the country.Séroprévalence de Toxoplasma gondii chez les Rongeurs commensaux au Sénégal, Afrique de l’Ouest. Les risques liés à l’infection par Toxoplasma gondii chez l’homme restent mal connus au Sénégal. Bien que les Rongeurs soient considérés comme des marqueurs pertinents de la circulation de T. gondii, peu d’études ont ciblé ces hôtes en Afrique sub-saharienne. Le but de cette étude était d’étudier la séroprévalence de Toxoplasma chez les Rongeurs des villes et des villages du Sénégal. Les Rongeurs ont été échantillonnés dans 40 localités avec un protocole de piégeage standardisé. La détection des anticorps contre T. gondii a été faite sur 1205 Rongeurs avec un test d’agglutination modifié. Les données de séroprévalence ont été analysées en fonction de la géographie, de la communauté locale de Rongeurs et de caractéristiques individuelles du Rongeur. Nous avons trouvé 44 individus séropositifs, de quatre espèces différentes (Mastomys erythroleucus, Mastomys natalensis, Mus musculus domesticus, Rattus rattus). La séroprévalence moyenne est faible, de l’ordre de 4 % au sein des localités. Les plus fortes séroprévalences (jusqu’à 24 %) ont été observées dans le Nord du Sénégal, une région connue pour être le coeur de l’élevage pastoral dans le pays
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Seroprevalence of Toxoplasma gondii in commensal rodents sampled across Senegal, West Africa
2018Co-Authors: Brouat Carine, Diagne, Christophe Amidi, Ismaïl Khadija, Aroussi Abdelkrim, Dalecky Ambroise, Ba Khalilou, Kane Mamadou, Niang Youssoupha, Diallo Mamoudou, Sow AliouAbstract:Risks related to Toxoplasma gondii infection in humans remain poorly known in Senegal. Although rodent surveys could help to assess the circulation of T. gondii, they have seldom been set up in sub-Saharan Africa. The aim of this study was to examine Toxoplasma seroprevalence in rodents from villages and towns across Senegal. Rodents were sampled in 40 localities using a standardised trapping protocol. Detection of T. gondii antibodies was performed on 1205 rodents, using a modified agglutination test (MAT) technique. Seroprevalence data were analysed depending on geography, the local rodent community, and individual characteristics of the rodent hosts. We found 44 seropositive rodents from four different species (Mastomys erythroleucus, Mastomys natalensis, Mus musculus domesticus, Rattus rattus). Toxoplasma seroprevalence was low, averaging 4% in the localities. Higher Toxoplasma seroprevalence (up to 24%) was found in northern Senegal, a region known to be the heart of pastoral herding in the country.Séroprévalence de Toxoplasma gondii chez les Rongeurs commensaux au Sénégal, Afrique de l’Ouest. Les risques liés à l’infection par Toxoplasma gondii chez l’homme restent mal connus au Sénégal. Bien que les Rongeurs soient considérés comme des marqueurs pertinents de la circulation de T. gondii, peu d’études ont ciblé ces hôtes en Afrique sub-saharienne. Le but de cette étude était d’étudier la séroprévalence de Toxoplasma chez les Rongeurs des villes et des villages du Sénégal. Les Rongeurs ont été échantillonnés dans 40 localités avec un protocole de piégeage standardisé. La détection des anticorps contre T. gondii a été faite sur 1205 Rongeurs avec un test d’agglutination modifié. Les données de séroprévalence ont été analysées en fonction de la géographie, de la communauté locale de Rongeurs et de caractéristiques individuelles du Rongeur. Nous avons trouvé 44 individus séropositifs, de quatre espèces différentes (Mastomys erythroleucus, Mastomys natalensis, Mus musculus domesticus, Rattus rattus). La séroprévalence moyenne est faible, de l’ordre de 4 % au sein des localités. Les plus fortes séroprévalences (jusqu’à 24 %) ont été observées dans le Nord du Sénégal, une région connue pour être le coeur de l’élevage pastoral dans le pays
