76
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Buynak R, Shapiro D, Okamoto A, Lange C, Etropolski M. Efficacy, safety, and gastrointestinal tolerability of tapentadol ER in a randomized, double-blind, placebo- and active-controlled phase III study of patients with chronic low back pain. THE JOURNAL OF PAIN 2009. [DOI: 10.1016/j.jpain.2009.01.202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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77
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Upmalis D, Pei H, Okamoto A, Laschewski F, Rauschkolb-Löffler C, Häussler J, Häufel T, Lange C, Oh C. A pooled analysis of the incidences of treatment-emergent adverse events associated with discontinuation in phase 2/3 studies of tapentadol IR. THE JOURNAL OF PAIN 2009. [DOI: 10.1016/j.jpain.2009.01.176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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78
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Etropolski M, Rauschkolb-Löffler C, Shapiro D, Okamoto A, Lange C. A randomized, double-blind, placebo- and active-controlled phase III study of tapentadol ER for chronic low back pain: analysis of efficacy endpoint sensitivity. THE JOURNAL OF PAIN 2009. [DOI: 10.1016/j.jpain.2009.01.275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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79
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Kavanagh S, Kwong W, Hammond G, Upmalis D, Okamoto A, Yang M. Bowel function following tapentadol and oxycodone immediate release (IR) Treatment in subjects with end stage joint disease: post-hoc analysis of data from a randomized, double-blind, active- and placebo-controlled study. THE JOURNAL OF PAIN 2009. [DOI: 10.1016/j.jpain.2009.01.180] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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80
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Etropolski M, Kleinert R, Shapiro D, Okamoto A, Lange R, Rauschkolb C. Health-related outcomes associated with tapentadol extended release (ER) treatment for the management of painful diabetic peripheral neuropathy (DPN): results of a randomized-withdrawal phase 3 trial. Can J Diabetes 2009. [DOI: 10.1016/s1499-2671(09)33033-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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81
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Okamoto A, Shapiro D, Lange B, Lange R, Etropolski M. Health status (EuroQol-5 Dimension [EQ-5D]) in patients with painful diabetic peripheral neuropathy (DPN) treated with tapentadol extended release (ER): results of a randomized-withdrawal phase 3 study. Can J Diabetes 2009. [DOI: 10.1016/s1499-2671(09)33157-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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82
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Aoki S, Okamoto A, Danjo K, Sunada H, Otuka A. Compatibility of Ibuprofen and Ethenzamide. Drug Dev Ind Pharm 2008. [DOI: 10.3109/03639049709149820] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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83
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Kobuchi T, Kisaki M, Shinto K, Okamoto A, Kitajima S, Sasao M, Tsumori K, Kaneko O, Sakakita H, Kiyama S, Hirano Y, Wada M. Effects of filament geometry on the arc efficiency of a high-intensity He+ ion source. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:10F316. [PMID: 19044629 DOI: 10.1063/1.2965781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A strongly focusing high-intensity He(+) ion source equipped with three concave electrodes has been designed and constructed as the beam source for a high-energy He(0) neutral beam probe system to diagnose fusion-produced alpha particles in thermonuclear fusion plasmas. The reduction of heat load onto the concave extraction electrodes is particularly important for a long pulse operation, as the heat load deforms the electrodes and thus the beam focal length. The effects on the arc efficiency (beam current/arc power) of the ion source due to the discharge filament structure (straight-type and L-shape-type filaments), size (filament diameters of 2 and 1.5 mm), number, and the locations have been studied. Choice of the appropriate filament structure improved the arc efficiency by 17%.
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84
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Funaki D, Isobe M, Nishiura M, Sato Y, Okamoto A, Kobuchi T, Kitajima S, Sasao M. Full orbit calculation for lost alpha particle measurement on ITER. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:10E512. [PMID: 19044496 DOI: 10.1063/1.2974810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
An orbit following calculation code with full gyromotion under the ITER magnetic field configuration has been developed to investigate escaping alpha particle orbits in ITER and to determine the geometrical arrangement for alpha particle detection. The code contained the full geometrical information of the first wall panels. It was carefully investigated whether an alpha particle escaping from the plasma through the last closed flux surface does not touch or intersect the first wall boundary before reaching the detection point. Candidates of blanket module modification have been studied to achieve effective measurement geometry for escaping alpha particle detection. The calculations showed that direct orbit loss and banana diffusion can be detected with a probe head recessed from the first wall surface.
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85
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Okamoto A, Kubota T, Ikeda S. Design of a fluorescent probe for DNA/RNA imaging. ACTA ACUST UNITED AC 2008:231-2. [DOI: 10.1093/nass/nrn117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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86
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Nishijima N, Hayasaki H, Okamoto A, Nakata S, Yamasaki Y, Nakata M. Difference in tracks between habitual open and close mandibular movements at the condyle in children. J Oral Rehabil 2008. [DOI: 10.1111/j.1365-2842.2000.00618.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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87
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Oh C, Upmalis D, Okamoto A, Ma Y, Stegmann J, Daniels S. (229) Efficacy of tapentadol immediate release in patients with pain after bunionectomy. THE JOURNAL OF PAIN 2008. [DOI: 10.1016/j.jpain.2008.01.150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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88
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Hartrick C, Okamoto A, Oh C, Van Hove I, Stegmann J, Upmalis D. (222) Analgesic efficacy of tapentadol immediate release in patients with pain from end stage joint disease. THE JOURNAL OF PAIN 2008. [DOI: 10.1016/j.jpain.2008.01.143] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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89
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Afilalo M, Oh C, Okamoto A, Van Hove I, Stegmann J, Upmalis D. (224) Tapentadol immediate release compared with oxycodone immediate release for the relief of moderate-to-severe pain in patients with end stage joint disease. THE JOURNAL OF PAIN 2008. [DOI: 10.1016/j.jpain.2008.01.145] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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90
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Sugawara H, Shinto K, Tanaka N, Takeuchi S, Kikuchi M, Okamoto A, Kitajima S, Sasao M, Wada M. Diagnostics of a He(+) beam extracted from a compact magnetic bucket-type ion source. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:02B708. [PMID: 18315199 DOI: 10.1063/1.2802282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Performance of a compact He(+) ion source was investigated before installing it to the experiment system developed for studying the efficiency of autodetachment neutralization from He(-) to He(0). Dependence of the extracted ion current upon the plasma parameters and that upon the extraction voltage indicated that the source performance was limited by space charge effect. The beam emittance was measured with a multislit system for various operation conditions. The experimentally determined emittance agreed well with the emittance obtained from ion trajectories calculated with input plasma parameters measured by a Langmuir probe. The beam current density of 60 mA/cm(2) and the emittance of less than 25pi mm mrad are expected to deliver enough current to the downstream of the He(-) neutralizer system to clarify factors affecting the final He(0) intensity.
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91
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Takeuchi S, Sasao M, Sugawara H, Tanaka N, Kisaki M, Okamoto A, Shinto K, Kitajima S, Nishiura M, Wada M. Energy straggling of low-energy ion beam in a charge exchange cell for negative ion production. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:02A509. [PMID: 18315130 DOI: 10.1063/1.2816665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Energy straggling in a charge exchange cell, which is frequently used for negative ion production, was studied experimentally and compared with the results of theoretical evaluation. The change of the energy spectrum of a He(+) beam due to charge exchange processes in argon gas was measured in the energy range of 2-6 keV. Energy straggling by multiple collisions is expressed by the energy loss formula due to inelastic and elastic processes. The impact parameter is related to the elastic scattering angle, and the geometry of the charge exchange cell and other components of the beam transportation system determines the maximum acceptable scattering angle. The energy spread was evaluated taking the integral limit over the impact parameter into consideration. The theoretical results showed good agreement with those of actual measurement.
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92
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Kisaki M, Shinto K, Kobuchi T, Okamoto A, Kitajima S, Sasao M, Tsumori K, Nishiura M, Kaneko O, Matsuda Y, Wada M, Sakakita H, Kiyama S, Hirano Y. Development of a strongly focusing high-intensity He(+) ion source for a confined alpha particle measurement at ITER. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:02C113. [PMID: 18315239 DOI: 10.1063/1.2801543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
A strongly focusing high-intensity He(+) ion source has been designed and constructed as a beam source for a high-energy He(0) beam probe system for diagnosis of fusion produced alpha particles in the thermonuclear fusion plasmas. The He(+) beam was extracted from the ion source at an acceleration voltage of 18-35 kV. Temperature distributions of the beam target were observed with an IR camera. The 1/e-holding beam profile half-width was about 15 mm at optimum perveance (Perv) of 0.03 (I(beam)=2.4 A). A beam current about 3 A was achieved at an acceleration voltage of 26.7 kV with an arc power of 10 kW (Perv=0.023).
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93
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Tanaka N, Kikuchi M, Nagamura T, Sugawara H, Takeuchi S, Kobuchi T, Okamoto A, Shinto K, Kitajima S, Sasao M, Wada M. A beam transport system for an intense He(-) beam source. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2008; 79:02A512. [PMID: 18315133 DOI: 10.1063/1.2816967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We have been developing a test stand for fast He(0) beam production. One of the major issues is how to transport effectively the He(+) and He(-) beams from which the He(0) beam is produced. The beam should be focused in two transverse focal points, the center of the charge exchange cell and the electrostatic accelerator. We studied the beam transport system and effect of space charge neutralization in the test stand by experiments and calculation.
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Kamisawa T, Tu Y, Egawa N, Tsuruta K, Okamoto A, Kamata N. MRCP of congenital pancreaticobiliary malformation. ACTA ACUST UNITED AC 2007; 32:129-33. [PMID: 16680507 DOI: 10.1007/s00261-006-9005-3] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Congenital pancreaticobiliary malformations are sometimes associated with acute or chronic pancreatitis and biliary carcinoma. Currently, magnetic resonance cholangiopancreatography (MRCP) is one of the first choices for investigating and diagnosing pancreaticobiliary diseases noninvasively. We compared the accuracy of conventional MRCP and endoscopic retrograde cholangiopancreatography (ERCP) in making the diagnosis of congenital pancreaticobiliary malformations. METHODS In patients with pancreas divisum (n = 17), pancreaticobiliary maljunction (n = 12), choledochocele (n = 2), and annular pancreas (n = 1) who underwent ERCP and MRCP, the diagnostic accuracy and findings on MRCP were compared with those on ERCP. RESULTS Of the 32 patients with congenital pancreaticobiliary malformations diagnosed on ERCP, 23 (72%) presented the same diagnosis on MRCP. Complete pancreas divisum was diagnosed in 73% on MRCP based on the finding of a dominant dorsal pancreatic duct crossing the lower bile duct and emptying into the duodenum without communicating with the ventral pancreatic duct. Pancreaticobiliary maljunction was diagnosed in 75% on MRCP based on the finding of an anomalous union between the common bile duct and the pancreatic duct and the existence of a long common channel. CONCLUSIONS Conventional MRCP is a useful, noninvasive tool for diagnosing congenital pancreaticobiliary malformations; and the diagnostic accuracy can be increased with three-dimensional MRCP or dynamic MRCP with secretin stimulation.
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95
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Kamisawa T, Tu Y, Egawa N, Tsuruta K, Okamoto A. Pancreatographic investigation of the pancreatic duct system. Surg Radiol Anat 2007; 29:405-8. [PMID: 17551665 DOI: 10.1007/s00276-007-0220-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2007] [Accepted: 05/21/2007] [Indexed: 11/29/2022]
Abstract
BACKGROUND Embryologically, the pancreatic duct system develops by the fusion between the dorsal and ventral pancreatic bud ducts. It has been suggested that the proximal part of the main dorsal pancreatic duct partially regresses to form the accessory pancreatic duct (APD). Aim of this study was to clarify the anatomy of the pancreatic duct system of the head of the pancreas and investigate the embryology of the normal pancreatic duct system. METHODS We reviewed endoscopic retrograde pancreatography of normal pancreatic heads (n = 256) and pancreas divisum (n = 36), focusing on long inferior branches arising from the APD and the main pancreatic duct (MPD). The accessory pancreatograms were divided into two patterns of course and shape, the long type (171 cases) and the short type (85 cases) according to the length of the MPD from the orifice to the junction with the APD. The long-type APD formed a straight line and joined the MPD at the neck portion of the pancreas. The short-type APD joined the MPD near its first inferior branch. RESULTS The shape of the long-type APD was quite similar to that of the dorsal pancreatic duct of pancreas divisum. The short-type APD was less likely to have a long inferior branch arising from the APD. The length of the APD from the orifice to the first long inferior branch was similar in the long-type APD (19.4 +/- 4.0 mm) and in the short-type APD (18.8 +/- 4.2 mm). The first long inferior branch from the long-type APD passed though the MPD near the origin of the inferior branch from the MPD, whereas the short-type APD joined the MPD near its inferior branch. CONCLUSIONS There are two types of APD. The long-type APD was quite similar to the shape of the dorsal pancreatic duct of pancreas divisum, and seems to represent a continuation of the main duct of the dorsal pancreatic bud. The short-type APD was less likely to have a long inferior branch, and seems to be formed by the most proximal part of the main duct of the dorsal pancreatic bud and its long inferior branch.
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96
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Ogawa M, Ogawa H, Takahashi H, Tanaka Y, Utoh H, Shinde J, Iwazaki K, Aoyama H, Umetsu H, Okamoto A, Shinto K, Kitajima S, Yokoyama M, Inagaki S, Suzuki Y, Nishimura K, Sasao M. Ion Temperature Measurements in Tohoku University Heliac for Analysis of the Improved Mode Transition. FUSION SCIENCE AND TECHNOLOGY 2007. [DOI: 10.13182/fst07-a1371] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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97
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Kamisawa T, Tu Y, Nakajima H, Egawa N, Tsuruta K, Okamoto A. The presence of a common channel and associated pancreaticobiliary diseases: a prospective ERCP study. Dig Liver Dis 2007; 39:173-9. [PMID: 17174162 DOI: 10.1016/j.dld.2006.09.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2006] [Revised: 07/07/2006] [Accepted: 09/19/2006] [Indexed: 12/11/2022]
Abstract
BACKGROUND There are few endoscopic retrograde cholangiographic studies dealing with the relationship between the presence of a common channel and associated pancreaticobiliary diseases. AIMS To endoscopically determine the incidence of common channels and assess whether the anatomy of the pancreaticobiliary ductal drainage into the duodenum has any bearing on pancreaticobiliary diseases. PATIENTS AND METHODS We prospectively examined a common channel formation in 354 endoscopic retrograde cholangiographic cases. Cases with a common channel were divided into three groups: pancreaticobiliary maljunction, high confluence of pancreaticobiliary ducts with a common channel > or =6 mm in which the communication was occluded with the sphincter contraction, and common channel < or =5 mm in length. RESULTS A common channel was observed in 131 cases (37.0%) including 11 with pancreaticobiliary maljunction and 13 with high confluence of pancreaticobiliary ducts. In cases with a common channel, the incidences of associated gallbladder carcinoma and acute pancreatitis were both 11.5%, which were significantly higher than 1.8% and 4.9% seen in cases without a common channel. In pancreaticobiliary maljunction cases, incidence of associated gallbladder carcinoma was 72.7%. CONCLUSION The presence of an obvious common channel was observed in 37.0%. A close relationship is suggested between the presence of a common channel and development of gallbladder carcinoma and acute pancreatitis.
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98
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Utoh H, Nishimura K, Inagaki S, Takahashi H, Tanaka Y, Takenaga M, Ogawa M, Shinde J, Iwazaki K, Okamoto A, Shinto K, Kitajima S, Sasao M. High-Density Plasma Production by Hydrogen Storage Electrode in the Tohoku University Heliac. FUSION SCIENCE AND TECHNOLOGY 2006. [DOI: 10.13182/fst06-a1266] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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99
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Kimura R, Sakata T, Kokubo Y, Okamoto A, Okayama A, Tomoike H, Miyata T. Plasma protein S activity correlates with protein S genotype but is not sensitive to identify K196E mutant carriers. J Thromb Haemost 2006; 4:2010-3. [PMID: 16961608 DOI: 10.1111/j.1538-7836.2006.02071.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Protein S (PS) is an anticoagulant protein that functions as a cofactor for activated protein C (APC), and congenital PS deficiency is a well-known risk factor for the development of deep vein thrombosis (DVT). Recently, we and others identified the K196E missense mutation in the second epidermal growth factor-like domain of PS as a genetic risk factor for DVT in the Japanese population. The incidence of this mutation is high in the Japanese population. OBJECTIVES In the present study, we investigated the relationship between plasma PS activity and the presence of the K196E mutation. PATIENTS AND METHODS We measured PS activity as a cofactor activity for APC in 1,862 Japanese individuals and determined the PS K196E genotype in this population. RESULTS Individuals heterozygous for the mutant E-allele had lower plasma PS activity than wildtype subjects (mean +/- SD, 71.9 +/- 17.6%, n = 34 vs. 87.9 +/- 19.8%, n = 1,828, P < 0.0001). However, the PS activity of several heterozygous individuals (n = 8) was greater than the population average. In contrast, multiple wildtype subjects (n = 26) had PS activity less than 2 SD below the population mean, indicating that other genetic or environmental factors affect PS activity. CONCLUSIONS Plasma PS activity itself is not suitable for identifying PS 196E carriers and other methods are required for carrier detection.
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100
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Kuwahara K, Osako K, Okamoto A, Konno K. Solubilization of Myofibrils and Inhibition of Autolysis of Squid Mantle Muscle by Sodium Citrate. J Food Sci 2006. [DOI: 10.1111/j.1750-3841.2006.00112.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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