The Experts below are selected from a list of 105 Experts worldwide ranked by ideXlab platform
Michiyasu Suzuki - One of the best experts on this subject based on the ideXlab platform.
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navigation guided Fence Post tube technique for resection of a brain tumor technical note
Minimally Invasive Neurosurgery, 2010Co-Authors: K Kajiwara, K Yoshikawa, Makoto Ideguchi, Sadahiro Nomura, Hirosuke Fujisawa, T Akimura, Shoichi Kato, Masami Fujii, Michiyasu SuzukiAbstract:INTRODUCTION: A new technique using a navigation system to minimize the influence of brain shift and to perform precise resection of brain tumors is demonstrated. To determine the resection plane, one to six tubes were inserted around the tumor under the guidance of a navigation system before dural incision. RESULTS: This technique termed the "navigation-guided Fence-Post tube" (NGFP) procedure was used to treat 34 patients with intraaxial brain tumors including gliomas (23 cases), malignant lymphomas (4 cases) and metastatic tumors (7 cases). Tumors were removed totally in 23 cases (67.6%), subtotally (95% or more removal) in 6 cases (17.6%) and partially (less than 95% removal) in 5 cases (14.7%). The cases with subtotal or partial resection contained tumors that were close to or involved the eloquent area, or disseminated lesions. No complications due to tube insertion occurred. CONCLUSION: NGFP is a useful and safe technique for brain tumor surgery with no influence of brain shift during tumor resection.
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improvement of functional outcome after radical surgery in glioblastoma patients the efficacy of a navigation guided Fence Post procedure and neurophysiological monitoring
Journal of Neuro-oncology, 2006Co-Authors: Koichi Yoshikawa, Hirosuke Fujisawa, Shoichi Kato, Masami Fujii, Koji Kajiwara, Jun Morioka, Nobuhiro Tanaka, Michiyasu SuzukiAbstract:This retrospective study investigated the functional outcomes of patient with glioblastoma receiving radical surgery before and after the adoption of the navigation-guided Fence-Post (NGFP) procedure and neurophysiological monitoring. We investigated 42 glioblastoma patients receiving radical surgery in our institute between 1980 and 2005. Of the 42 patients, 18 patients from 1980 to 1996 (1st term) underwent radical surgery without navigation system guidance, NGFP, or neurophysiological monitoring; 11 patients from 1997 to 2002 (2nd term) underwent surgery with simple navigation system guidance but without NGFP procedure or neurophysiological monitoring, and 13 patients from 2003 to 2005 (3rd term) underwent surgery with the NGFP procedure and neurophysiological monitoring as appropriate. There were no significance differences between any of the three term groups in age, gender, preoperative KPS score, or ‘surgical staging for glioma’ according to the difficulty of surgery. The rates of 95% or greater volume reduction in each term were 38.9%, 54.5% and 76.9%. The rates of morbidity were 38.9%, 18.1% and 0%. The change in KPS scores (delta KPS) before and after the perioperative period in each term were −16.1 ± 6.6SEM, −9.0 ± 5.8SEM and +8.5 ± 3.7SEM, respectively. The delta KPS in the 3rd term was significantly better than those of 1st and 2nd terms (P < 0.01, Kruskal–Wallis rank test). The rate of patients who were discharged to home and who resumed daily useful life without assistance was 38.9%, 63.6% and 84.6% in each term, respectively. The mean survival times in each term were 9.9, 14.0 and 16.8 months. The introduction of the NGFP procedure and neurophysiological monitoring in glioblastoma radical surgery improved the functional outcome of patients.
Takanori Ohnishi - One of the best experts on this subject based on the ideXlab platform.
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surgical results of tumor resection using tractography integrated navigation guided Fence Post catheter techniques and motor evoked potentials for preservation of motor function in patients with glioblastomas near the pyramidal tracts
Neurosurgical Review, 2015Co-Authors: Shiro Ohue, Shohei Kohno, Akihiro Inoue, Daisuke Yamashita, Shirabe Matsumoto, Satoshi Suehiro, Yoshiaki Kumon, Keiichi Kikuchi, Takanori OhnishiAbstract:The current optimal surgery for glioblastomas (GBMs) near the pyramidal tract (PT) is to remove as much tumor as possible and to preserve motor function. The purpose of this study is to investigate the usefulness of tractography-integrated navigation-guided Fence-Post catheter techniques and motor-evoked potentials (MEPs) for preserving Postoperative motor function after GBM surgery. We retrospectively examined 49 patients who underwent resection for GBM near the PT. Diffusion tensor (DT) imaging-based tractography of the PT was performed preoperatively and integrated into the navigation system. When possible, silicon catheters were used as “Fence-Posts” and were inserted along the tumor boundaries, avoiding the PT, before tumor removal using the navigation system (Fence-Post catheter techniques). Cortical and subcortical MEPs were also monitored during resection of the tumor. Fence-Post catheter techniques using a tractography-integrated navigation system were used in 45 of 49 patients. This technique enabled placement of the catheters, avoided the motor pathways, and allowed easier resection of the tumors. Tumors near the PT were resected using subcortical and cortical MEPs. The amplitudes of cortical MEPs after tumor removal were maintained at over 33 % of those obtained before resection. Thirty-six patients showed obvious responses of subcortical MEPs at ≤20 mA. The degree of resection was gross total in 21 patients, subtotal in 21, and partial in seven. One month after surgery, only one patient showed worsened motor function. Therefore, Fence-Post catheter techniques using a tractography-integrated navigation system and MEPs may contribute to preserving motor function after surgery for GBMs that are near the PT.
Masami Fujii - One of the best experts on this subject based on the ideXlab platform.
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navigation guided Fence Post tube technique for resection of a brain tumor technical note
Minimally Invasive Neurosurgery, 2010Co-Authors: K Kajiwara, K Yoshikawa, Makoto Ideguchi, Sadahiro Nomura, Hirosuke Fujisawa, T Akimura, Shoichi Kato, Masami Fujii, Michiyasu SuzukiAbstract:INTRODUCTION: A new technique using a navigation system to minimize the influence of brain shift and to perform precise resection of brain tumors is demonstrated. To determine the resection plane, one to six tubes were inserted around the tumor under the guidance of a navigation system before dural incision. RESULTS: This technique termed the "navigation-guided Fence-Post tube" (NGFP) procedure was used to treat 34 patients with intraaxial brain tumors including gliomas (23 cases), malignant lymphomas (4 cases) and metastatic tumors (7 cases). Tumors were removed totally in 23 cases (67.6%), subtotally (95% or more removal) in 6 cases (17.6%) and partially (less than 95% removal) in 5 cases (14.7%). The cases with subtotal or partial resection contained tumors that were close to or involved the eloquent area, or disseminated lesions. No complications due to tube insertion occurred. CONCLUSION: NGFP is a useful and safe technique for brain tumor surgery with no influence of brain shift during tumor resection.
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improvement of functional outcome after radical surgery in glioblastoma patients the efficacy of a navigation guided Fence Post procedure and neurophysiological monitoring
Journal of Neuro-oncology, 2006Co-Authors: Koichi Yoshikawa, Hirosuke Fujisawa, Shoichi Kato, Masami Fujii, Koji Kajiwara, Jun Morioka, Nobuhiro Tanaka, Michiyasu SuzukiAbstract:This retrospective study investigated the functional outcomes of patient with glioblastoma receiving radical surgery before and after the adoption of the navigation-guided Fence-Post (NGFP) procedure and neurophysiological monitoring. We investigated 42 glioblastoma patients receiving radical surgery in our institute between 1980 and 2005. Of the 42 patients, 18 patients from 1980 to 1996 (1st term) underwent radical surgery without navigation system guidance, NGFP, or neurophysiological monitoring; 11 patients from 1997 to 2002 (2nd term) underwent surgery with simple navigation system guidance but without NGFP procedure or neurophysiological monitoring, and 13 patients from 2003 to 2005 (3rd term) underwent surgery with the NGFP procedure and neurophysiological monitoring as appropriate. There were no significance differences between any of the three term groups in age, gender, preoperative KPS score, or ‘surgical staging for glioma’ according to the difficulty of surgery. The rates of 95% or greater volume reduction in each term were 38.9%, 54.5% and 76.9%. The rates of morbidity were 38.9%, 18.1% and 0%. The change in KPS scores (delta KPS) before and after the perioperative period in each term were −16.1 ± 6.6SEM, −9.0 ± 5.8SEM and +8.5 ± 3.7SEM, respectively. The delta KPS in the 3rd term was significantly better than those of 1st and 2nd terms (P < 0.01, Kruskal–Wallis rank test). The rate of patients who were discharged to home and who resumed daily useful life without assistance was 38.9%, 63.6% and 84.6% in each term, respectively. The mean survival times in each term were 9.9, 14.0 and 16.8 months. The introduction of the NGFP procedure and neurophysiological monitoring in glioblastoma radical surgery improved the functional outcome of patients.
Shoichi Kato - One of the best experts on this subject based on the ideXlab platform.
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navigation guided Fence Post tube technique for resection of a brain tumor technical note
Minimally Invasive Neurosurgery, 2010Co-Authors: K Kajiwara, K Yoshikawa, Makoto Ideguchi, Sadahiro Nomura, Hirosuke Fujisawa, T Akimura, Shoichi Kato, Masami Fujii, Michiyasu SuzukiAbstract:INTRODUCTION: A new technique using a navigation system to minimize the influence of brain shift and to perform precise resection of brain tumors is demonstrated. To determine the resection plane, one to six tubes were inserted around the tumor under the guidance of a navigation system before dural incision. RESULTS: This technique termed the "navigation-guided Fence-Post tube" (NGFP) procedure was used to treat 34 patients with intraaxial brain tumors including gliomas (23 cases), malignant lymphomas (4 cases) and metastatic tumors (7 cases). Tumors were removed totally in 23 cases (67.6%), subtotally (95% or more removal) in 6 cases (17.6%) and partially (less than 95% removal) in 5 cases (14.7%). The cases with subtotal or partial resection contained tumors that were close to or involved the eloquent area, or disseminated lesions. No complications due to tube insertion occurred. CONCLUSION: NGFP is a useful and safe technique for brain tumor surgery with no influence of brain shift during tumor resection.
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improvement of functional outcome after radical surgery in glioblastoma patients the efficacy of a navigation guided Fence Post procedure and neurophysiological monitoring
Journal of Neuro-oncology, 2006Co-Authors: Koichi Yoshikawa, Hirosuke Fujisawa, Shoichi Kato, Masami Fujii, Koji Kajiwara, Jun Morioka, Nobuhiro Tanaka, Michiyasu SuzukiAbstract:This retrospective study investigated the functional outcomes of patient with glioblastoma receiving radical surgery before and after the adoption of the navigation-guided Fence-Post (NGFP) procedure and neurophysiological monitoring. We investigated 42 glioblastoma patients receiving radical surgery in our institute between 1980 and 2005. Of the 42 patients, 18 patients from 1980 to 1996 (1st term) underwent radical surgery without navigation system guidance, NGFP, or neurophysiological monitoring; 11 patients from 1997 to 2002 (2nd term) underwent surgery with simple navigation system guidance but without NGFP procedure or neurophysiological monitoring, and 13 patients from 2003 to 2005 (3rd term) underwent surgery with the NGFP procedure and neurophysiological monitoring as appropriate. There were no significance differences between any of the three term groups in age, gender, preoperative KPS score, or ‘surgical staging for glioma’ according to the difficulty of surgery. The rates of 95% or greater volume reduction in each term were 38.9%, 54.5% and 76.9%. The rates of morbidity were 38.9%, 18.1% and 0%. The change in KPS scores (delta KPS) before and after the perioperative period in each term were −16.1 ± 6.6SEM, −9.0 ± 5.8SEM and +8.5 ± 3.7SEM, respectively. The delta KPS in the 3rd term was significantly better than those of 1st and 2nd terms (P < 0.01, Kruskal–Wallis rank test). The rate of patients who were discharged to home and who resumed daily useful life without assistance was 38.9%, 63.6% and 84.6% in each term, respectively. The mean survival times in each term were 9.9, 14.0 and 16.8 months. The introduction of the NGFP procedure and neurophysiological monitoring in glioblastoma radical surgery improved the functional outcome of patients.
Hirosuke Fujisawa - One of the best experts on this subject based on the ideXlab platform.
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navigation guided Fence Post tube technique for resection of a brain tumor technical note
Minimally Invasive Neurosurgery, 2010Co-Authors: K Kajiwara, K Yoshikawa, Makoto Ideguchi, Sadahiro Nomura, Hirosuke Fujisawa, T Akimura, Shoichi Kato, Masami Fujii, Michiyasu SuzukiAbstract:INTRODUCTION: A new technique using a navigation system to minimize the influence of brain shift and to perform precise resection of brain tumors is demonstrated. To determine the resection plane, one to six tubes were inserted around the tumor under the guidance of a navigation system before dural incision. RESULTS: This technique termed the "navigation-guided Fence-Post tube" (NGFP) procedure was used to treat 34 patients with intraaxial brain tumors including gliomas (23 cases), malignant lymphomas (4 cases) and metastatic tumors (7 cases). Tumors were removed totally in 23 cases (67.6%), subtotally (95% or more removal) in 6 cases (17.6%) and partially (less than 95% removal) in 5 cases (14.7%). The cases with subtotal or partial resection contained tumors that were close to or involved the eloquent area, or disseminated lesions. No complications due to tube insertion occurred. CONCLUSION: NGFP is a useful and safe technique for brain tumor surgery with no influence of brain shift during tumor resection.
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improvement of functional outcome after radical surgery in glioblastoma patients the efficacy of a navigation guided Fence Post procedure and neurophysiological monitoring
Journal of Neuro-oncology, 2006Co-Authors: Koichi Yoshikawa, Hirosuke Fujisawa, Shoichi Kato, Masami Fujii, Koji Kajiwara, Jun Morioka, Nobuhiro Tanaka, Michiyasu SuzukiAbstract:This retrospective study investigated the functional outcomes of patient with glioblastoma receiving radical surgery before and after the adoption of the navigation-guided Fence-Post (NGFP) procedure and neurophysiological monitoring. We investigated 42 glioblastoma patients receiving radical surgery in our institute between 1980 and 2005. Of the 42 patients, 18 patients from 1980 to 1996 (1st term) underwent radical surgery without navigation system guidance, NGFP, or neurophysiological monitoring; 11 patients from 1997 to 2002 (2nd term) underwent surgery with simple navigation system guidance but without NGFP procedure or neurophysiological monitoring, and 13 patients from 2003 to 2005 (3rd term) underwent surgery with the NGFP procedure and neurophysiological monitoring as appropriate. There were no significance differences between any of the three term groups in age, gender, preoperative KPS score, or ‘surgical staging for glioma’ according to the difficulty of surgery. The rates of 95% or greater volume reduction in each term were 38.9%, 54.5% and 76.9%. The rates of morbidity were 38.9%, 18.1% and 0%. The change in KPS scores (delta KPS) before and after the perioperative period in each term were −16.1 ± 6.6SEM, −9.0 ± 5.8SEM and +8.5 ± 3.7SEM, respectively. The delta KPS in the 3rd term was significantly better than those of 1st and 2nd terms (P < 0.01, Kruskal–Wallis rank test). The rate of patients who were discharged to home and who resumed daily useful life without assistance was 38.9%, 63.6% and 84.6% in each term, respectively. The mean survival times in each term were 9.9, 14.0 and 16.8 months. The introduction of the NGFP procedure and neurophysiological monitoring in glioblastoma radical surgery improved the functional outcome of patients.