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Raviol J, Plet G, Hasegawa R, Yu K, Kosukegawa H, Ohta M, Magoariec H, Pailler-Mattei C. Towards the mechanical characterisation of unruptured intracranial aneurysms: Numerical modelling of interactions between a deformation device and the aneurysm wall. J Mech Behav Biomed Mater 2024; 153:106469. [PMID: 38402693 DOI: 10.1016/j.jmbbm.2024.106469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2023] [Revised: 02/13/2024] [Accepted: 02/15/2024] [Indexed: 02/27/2024]
Abstract
Intracranial aneurysm is a critical pathology related to the arterial wall deterioration. This work is an essential aspect of a large scale project aimed at providing clinicians with a non-invasive patient-specific decision support tool regarding the rupture risk assessment. A machine learning algorithm links the aneurysm shape observed and a database of UIA clinical images associated with in vivo wall mechanical properties and rupture characterisation. The database constitution is derived from a device prototype coupled with medical imaging. It provides the mechanical characterisation of the aneurysm from the wall deformation obtained by inverse analysis based on the variation of luminal volume. Before performing in vivo tests of the device on small animals, a numerical model was built to quantify the device's impact on the aneurysm wall under natural blood flow conditions. As the clinician will never be able to precisely situate the device, several locations were considered. In preparation for the inverse analysis procedure, artery material laws of increasing complexity were studied (linear elastic, hyper elastic Fung-like). Considering all the device locations and material laws, the device induced relative displacements to the Systole peak (worst case scenario with the highest mechanical stimulus linked to the blood flow) ranging from 375 μm to 1.28 mm. The variation of luminal volume associated with the displacements was between 0.95 % and 4.3 % compared to the initial Systole volume of the aneurysm. Significant increase of the relative displacements and volume variations were found with the study of different cardiac cycle moments between the blood flow alone and the device application. For forthcoming animal model studies, Spectral Photon CT Counting, with a minimum spatial resolution of 250 μm, was selected as the clinical imaging technique. Based on this preliminary study, the displacements and associated volume variations (baseline for inverse analyse), should be observable and exploitable.
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Affiliation(s)
- J Raviol
- Laboratoire de Tribologie et Dynamique des Systèmes, CNRS UMR 5513, Université de Lyon, École Centrale de Lyon, France
| | - G Plet
- Laboratoire de Tribologie et Dynamique des Systèmes, CNRS UMR 5513, Université de Lyon, École Centrale de Lyon, France
| | - R Hasegawa
- Graduate School of Engineering, Tohuku University, 980-8579, Sendai Miyagi, Japan; Institute of Fluid Science, Tohuku University, 980-8577, Sendai Miyagi, Japan
| | - K Yu
- Institute of Fluid Science, Tohuku University, 980-8577, Sendai Miyagi, Japan
| | - H Kosukegawa
- Institute of Fluid Science, Tohuku University, 980-8577, Sendai Miyagi, Japan
| | - M Ohta
- Institute of Fluid Science, Tohuku University, 980-8577, Sendai Miyagi, Japan; ElyT MaX, CNRS UMI 3537, Université de Lyon, Tohoku University, France, Japan
| | - H Magoariec
- Laboratoire de Tribologie et Dynamique des Systèmes, CNRS UMR 5513, Université de Lyon, École Centrale de Lyon, France
| | - C Pailler-Mattei
- Laboratoire de Tribologie et Dynamique des Systèmes, CNRS UMR 5513, Université de Lyon, École Centrale de Lyon, France; ISPB-Faculté de Pharmacie, Université Claude Bernard Lyon 1, Université de Lyon, France.
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Yoshiko A, Ohta M, Kuramochi R, Mitsuyama H. Serum Adiponectin and Leptin Is Not Related to Skeletal Muscle Morphology and Function in Young Women. J Endocr Soc 2023; 7:bvad032. [PMID: 36911319 PMCID: PMC9998031 DOI: 10.1210/jendso/bvad032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Indexed: 03/03/2023] Open
Abstract
Adipokines secreted from adipose tissue, such as adiponectin and leptin, enhance skeletal muscle metabolism. Animal studies have shown that adipokine knockout leads to a reduction in muscle function. Muscle function is determined by muscle size and quality; therefore, it is speculated that lower adipokine levels affect skeletal muscle size and quality, eventually leading to lower muscle function. This study aimed to investigate the relationship between adipokines and skeletal muscle morphology and function in young individuals. A total of 21 young women participated in this study. Adiponectin and leptin levels were analyzed using fasting blood samples from all participants. B-mode ultrasound images of the thigh and calf were obtained, and the muscle thickness and echo intensity were measured in the vastus lateralis (VL) and medial gastrocnemius (MG). The shear modulus was measured from the VL and MG using shear wave elastography. Knee extension and plantar flexion peak torques were measured as muscle functions. Adiponectin and leptin were not related to echo intensity, shear modulus, and muscle thickness in the VL and MG (rs = -0.26-0.37, P > .05). Furthermore, no relationship was observed between adiponectin, leptin, knee extension, and dorsiflexion peak torque (rs = -0.28-0.41, P > .05). These negative results suggest that adiponectin and leptin levels in young women are not associated with muscle size and quality, nor are they related to muscle function.
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Affiliation(s)
- Akito Yoshiko
- Faculty of Liberal Arts and Sciences, Chukyo University, Toyota 470-0393, Japan
| | - Megumi Ohta
- Faculty of Liberal Arts and Sciences, Chukyo University, Toyota 470-0393, Japan
| | - Rieko Kuramochi
- School of Health and Sport Sciences, Chukyo University, Toyota 470-0393, Japan
| | - Hirohito Mitsuyama
- School of Health and Sport Sciences, Chukyo University, Toyota 470-0393, Japan
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Yoshiko A, Mitsuyama H, Kuramochi R, Ohta M. The influence of daily exercise on muscle echo intensity and stiffness in young women. Int J Sports Med 2023. [PMID: 36750221 DOI: 10.1055/a-2029-8909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
This study aimed to investigate the effect of daily exercise on skeletal muscle function, size, and quality in young women. Twenty-six young women participated in this study, categorized into daily exercise and non-exercise groups. The exercise group had performed exercise or training three times a week for more than six months. Knee extension and flexion, plantar flexion, and dorsiflexion peak torques were measured for muscle function. B-mode ultrasound images were taken from the thigh and calf, and muscle thickness and echo intensity were measured in the vastus lateralis and medial gastrocnemius. Shear modulus at different joint angles of the knee (0° [full extended], 40°, and 90°) and ankle (40 °plantarflexion, 0° [neutral], and 10 °dorsiflexion) was measured from the vastus lateralis and medial gastrocnemius to determine muscle stiffness. Peak torque and echo intensity did not significantly differ between the exercise and non-exercise groups. Shear modulus in the medial gastrocnemius at 10° dorsiflexion was significantly lower in the exercise group compared with the non-exercise group (34.2 ± 7.7 vs. 46.5 ± 13.1 kPa, P < 0.05). These results suggest that daily exercise and training could affect muscle stiffness, but do not lead to an increase in muscle function.
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Affiliation(s)
- Akito Yoshiko
- Faculty of Liberal Arts and Sciences, Chukyo University, Toyota, Japan
| | | | - Rieko Kuramochi
- School of Health and Sport Sciences, Chukyo University, Toyota, Japan
| | - Megumi Ohta
- Faculty of Liberal Arts and Sciences, Chukyo University, Nagoya, Japan
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Ohkura N, Taniguchi M, Oishi K, Inoue K, Ohta M. Angelica keiskei (Ashitaba) has potential as an antithrombotic health food. Food Res 2022. [DOI: 10.26656/fr.2017.6(2).121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Angelica keiskei (Ashitaba) is a large perennial herb that is native to the Pacific coast of
Japan. It has recently become popular as a healthy food in Asian countries because it
might have various physiological benefits including antithrombotic properties. Most
studies of the bioactive constituents from Ashitaba have focused on the activities of the
major chalcones, xanthoangelol and 4-hydroxyderricin. However, other chalcones,
flavanones and coumarins have also been isolated from Ashitaba, precisely characterized,
and investigated in vivo. Platelets play a key role in haemostasis and wound healing
processes. Dysregulated platelet activity is associated with the progression of platelet
aggregation and decreased venous blood flow, which results in thrombotic diseases. A
minor chalcone, xanthoangelol E, inhibits TXB2 synthesis in rabbit platelets, which seems
to be the source of the belief that Ashitaba has antithrombotic properties. However, recent
data showed that xanthoangelol and 4-hydroxyderricin inhibited the aggregation of rabbit
platelets. Platelet aggregation stimulated by collagen was also inhibited in whole blood
incubated with Xanthoangelol or 4-hydroxyderricin. Plasminogen activator inhibitor-1 is
the primary physiological inhibitor of tissue type plasminogen activator, a key protease of
the fibrinolytic system. An increase in plasma of this inhibitor is associated with
thrombotic conditions. Ashitaba yellow exudate inhibited the elevation of plasma
plasminogen activator inhibitor-1 in mice induced by obesity or chronic low-grade
inflammation. These studies showed the yellow exudate from stem cuttings and chalcones
isolated from Ashitaba roots and leaves might have antithrombotic activity. This article
reviews the possible antithrombotic properties of Ashitaba.
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Ishii Y, Aiba N, Ando M, Asakura N, Bierwage A, Cara P, Dzitko H, Edao Y, Gex D, Hasegawa K, Hayashi T, Hiwatari R, Hoshino T, Ikeda Y, Ishida S, Isobe K, Iwai Y, Jokinen A, Kasugai A, Kawamura Y, Kim JH, Kondo K, Kwon S, Lorenzo SC, Masuda K, Matsuyama A, Miyato N, Morishita K, Nakajima M, Nakajima N, Nakamichi M, Nozawa T, Ochiai K, Ohta M, Oyaidzu M, Ozeki T, Sakamoto K, Sakamoto Y, Sato S, Seto H, Shiroto T, Someya Y, Sugimoto M, Tanigawa H, Tokunaga S, Utoh H, Wang W, Watanabe Y, Yagi M. R&D Activities for Fusion DEMO in the QST Rokkasho Fusion Institute. Fusion Science and Technology 2021. [DOI: 10.1080/15361055.2021.1925030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Y. Ishii
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - N. Aiba
- National Institutes for Quantum and Radiological Science and Technology, Naka Fusion Institute, Naka City, Japan
| | - M. Ando
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - N. Asakura
- National Institutes for Quantum and Radiological Science and Technology, Naka Fusion Institute, Naka City, Japan
| | - A. Bierwage
- National Institutes for Quantum and Radiological Science and Technology, Naka Fusion Institute, Naka City, Japan
| | - P. Cara
- IFMIF/EVEDA Project Team, Rokkasho-Vill., Japan
| | - H. Dzitko
- Fusion for Energy, Broader Approach, Garching, Germany
| | | | - D. Gex
- Fusion for Energy, Broader Approach, Garching, Germany
| | - K. Hasegawa
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Hayashi
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - R. Hiwatari
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Hoshino
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Ikeda
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. Ishida
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - K. Isobe
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Iwai
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - A. Jokinen
- IFMIF/EVEDA Project Team, Rokkasho-Vill., Japan
| | - A. Kasugai
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Kawamura
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - J. H. Kim
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - K. Kondo
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. Kwon
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. C. Lorenzo
- Fusion for Energy, Broader Approach, Barcelona, Spain
| | - K. Masuda
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - A. Matsuyama
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - N. Miyato
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - K. Morishita
- Kyoto University, Institute of Advanced Energy, Uji, Japan
| | - M. Nakajima
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - N. Nakajima
- National Institute for Fusion Science, Department of Helical Plasma Research Rokkasho Research Center, Rokkasho-Vill., Japan
| | - M. Nakamichi
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Nozawa
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - K. Ochiai
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - M. Ohta
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - M. Oyaidzu
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Ozeki
- NAT Corporation, Tohoku Branch Office, Rokkasho-Vill., Japan
| | - K. Sakamoto
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Sakamoto
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. Sato
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - H. Seto
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - T. Shiroto
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Someya
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - M. Sugimoto
- NAT Corporation, Tohoku Branch Office, Rokkasho-Vill., Japan
| | - H. Tanigawa
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - S. Tokunaga
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - H. Utoh
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - W. Wang
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - Y. Watanabe
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
| | - M. Yagi
- National Institutes for Quantum and Radiological Science and Technology, Rokkasho Fusion Institute, Rokkasho-Vill., Japan
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Iino T, Shikino K, Ohta M, Uehara T, Ikusaka M. Recurrent Left Lower Abdominal Pain Due to Spontaneous Resolving Appendicitis. Am J Med 2021; 134:e283-e284. [PMID: 33144138 DOI: 10.1016/j.amjmed.2020.09.048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 09/07/2020] [Indexed: 10/23/2022]
Affiliation(s)
- Takaaki Iino
- Department of General Medicine, Chiba University Hospital, Chiba, Japan.
| | - Kiyoshi Shikino
- Department of General Medicine, Chiba University Hospital, Chiba, Japan
| | - M Ohta
- Department of General Medicine, Yokohama City University School of Medicine, Kanagawa, Japan
| | - T Uehara
- Department of General Medicine, Chiba University Hospital, Chiba, Japan
| | - Masatomi Ikusaka
- Department of General Medicine, Chiba University Hospital, Chiba, Japan
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Ohta M, Ozaki Y, Toriya T, Nagasaya R, Takatsu H, Yoshiki Y, Hashimoto Y, Ishikawa M, Kawai H, Muramatsu T, Naruse H, Takahashi H, Ishii J, Izawa H. Five-year major adverse cardiac and cerebrovascular events of patients with lipid core abutting lumen (LCAL) on integrated-backscatter intravascular ultrasound undergoing PCI with current DES. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Percutaneous Coronary Intervention (PCI) using the new generation drug-eluting stent (DES) has been extremely reduced target lesion revascularization (TLR) in recent years. However, a high incidence of non-target lesion-related cardiovascular events in patients undergoing PCI is an important problem to be solved. According to the previous findings, patients with vulnerable plaques particularly have a high recurrence of cardiovascular events. Little studies, however, has been done to examine the relationship between plaque characteristics on intravascular imaging in a target lesion and non-target lesion-related cardiovascular events.
Purpose
The main objective of this study is to investigate the five-year major adverse cardiac and cerebrovascular events (MACCE) of patients with lipid core abutting lumen (LCAL) on integrated backscatter intravascular ultrasound (IB-IVUS) in a target lesion undergoing PCI with current DES.
Methods and results
Between February 2010 and September 2013, in total 780 patients with ischemic heart disease undergoing PCI, 166 target lesions in 166 consecutive patients with non-ST segment elevation acute coronary syndrome (NSTE-ACS) and stable angina pectoris (SAP) undergoing IVUS-guided PCI were studied.
Plaque characteristics in all target lesions were analyzed by three-dimensional IB-IVUS system using the mechanical IVUS catheter. Our previous study has found that LCAL which is defined as a lipid pool directly in contact with the lumen visualizes the thin fibrous cap of less than 75μm on optical coherence tomography (OCT). On the basis of this data, LCAL at minimal lumen area (MLA) site was identified.
In total, 39 patients had lesions with LCAL at MLA site (LCAL(+)), and 127 patients had those without LCAL (LCAL(−)).
The primary endpoint was defined as MACCE, including cardiovascular death, non-fatal myocardial infarction, non-fatal stroke and non-TLR for the new lesion during a median follow up of five years. The MACCE occurred significantly higher in the LCAL(+) than in the LCAL(−) (38.5% vs. 17.3%; p<0.005). And the Kaplan-Meier estimates have shown that the cumulative incidence of MACCE was significantly higher in the LCAL(+) than in the LCAL(−) (log rank test, p=0.041). Additionally, after adjustment for confounders, gender, prior PCI and LCAL was the independent predictors for the MACCE of patients undergoing PCI with current DES.
Furthermore, after adding LCAL to a baseline model with established factors consisting of age, gender, diabetes mellitus, prior PCI and percentage lipid volume on IB-IVUS, the net reclassification (p<0.002) and integrated discrimination improvement (p<0.004) significantly improved compared to baseline model alone.
Conclusions
In this study, it has become clear that LCAL on IB-IVUS is likely to be a surrogate marker of MACCE in patients undergoing PCI with current DES.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- M Ohta
- Fujita Health University, Toyoake, Japan
| | - Y Ozaki
- Fujita Health University, Toyoake, Japan
| | - T Toriya
- Fujita Health University, Toyoake, Japan
| | - R Nagasaya
- Fujita Health University, Toyoake, Japan
| | - H Takatsu
- Fujita Health University, Toyoake, Japan
| | - Y Yoshiki
- Fujita Health University, Toyoake, Japan
| | | | - M Ishikawa
- Sakurabashi-Watanabe Hospital, Cardiology, Osaka, Japan
| | - H Kawai
- Fujita Health University, Toyoake, Japan
| | | | - H Naruse
- Fujita Health University, Toyoake, Japan
| | | | - J Ishii
- Fujita Health University, Toyoake, Japan
| | - H Izawa
- Fujita Health University Second Hospital, Cardiology, Nagoya, Japan
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Ishii J, Takahashi H, Nishimura H, Fujiwara W, Ohta M, Kawai H, Muramatsu T, Harada M, Yamada A, Naruse H, Motoyama S, Watanabe E, Izawa H, Ozaki Y. Circulating presepsin (soluble CD14 subtype) as a novel marker of mortality in patients treated at medical cardiac intensive care units. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.1838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Presepsin, a subtype of soluble CD14, is an inflammatory marker, which largely reflects monocyte activation. The association between presepsin levels and mortality in patients treated at medical cardiac intensive care units (CICUs) remains poorly known.
Objective
We aimed to understand the prognostic value of presepsin levels on admission to medical CICUs for mortality.
Methods
We prospectively studied 1636 heterogeneous patients (median age; 71 years) treated at medical (non-surgical) CICUs. Patients with stage 5 chronic kidney disease (estimated glomerular filtration rate [eGFR] <15 mL/min/1.73 m2) were excluded. Acute coronary syndrome was present in 46% of the patients, and acute decompensated heart failure in 36%. Upon admission, baseline plasma presepsin levels were measured. The primary endpoint was all-cause death.
Results
During a mean follow-up period of 44.6 months after admission, there were 323 (19.7%) deaths. Patients who died were older (median: 75 vs. 71 years, P<0.0001); had higher levels of presepsin (194 vs. 110 pg/mL, P<0.0001), B-type natriuretic peptide (BNP: 520 vs. 144 pg/mL, P<0.0001), high-sensitivity C-reactive protein (hsCRP: 4.7 vs. 2.0 mg/L, P<0.0001), and sequential organ failure assessment (SOFA) score (3 vs. 2, P<0.0001); and had lower levels of eGFR (55 vs. 69 mL/min/1.73m2, P<0.0001) and left ventricular ejection fraction (46% vs. 52%, P<0.0001) than those of the survivors. Multivariate Cox regression analyses revealed presepsin levels as independent predictors of all-cause deaths when assessed as either continuous variables (relative risk [RR] 3.33 per 10-fold increment; P<0.0001) or variables categorized according to quartiles (RR quartile 4 vs. 1, 3.60; P<0.0001). Quartiles of presepsin levels were significantly (P<0.0001) associated with increased risk of mortality (Figure). Adding presepsin levels to a baseline model that included established risk factors, BNP, and hsCRP further enhanced reclassification (P=0.009) and discrimination (P=0.0008) beyond that of the baseline model alone.
Conclusions
Circulating concentration of presepsin on admission may be a potent and independent predictor of mortality, and it may improve the risk stratification of patients admitted at medical CICUs.
Presepsin quartiles and mortality
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- J Ishii
- Dept of Joint Research Laboratory of Clinical Medicine, Fujita Health University School of Medicine, Toyoake, Japan
| | - H Takahashi
- Division of Statistics, Fujita Health University School of Medicine, Toyoake, Japan
| | - H Nishimura
- Dept of Cardiology, Fujita Health University School of Medicine, Toyoake, Japan
| | - W Fujiwara
- Dept of Cardiology, Banbuntane Hotokukai Hospital, Nagoya, Japan
| | - M Ohta
- Dept of Cardiology, Fujita Health University School of Medicine, Toyoake, Japan
| | - H Kawai
- Dept of Cardiology, Fujita Health University School of Medicine, Toyoake, Japan
| | - T Muramatsu
- Dept of Cardiology, Fujita Health University School of Medicine, Toyoake, Japan
| | - M Harada
- Dept of Cardiology, Fujita Health University School of Medicine, Toyoake, Japan
| | - A Yamada
- Dept of Cardiology, Fujita Health University School of Medicine, Toyoake, Japan
| | - H Naruse
- Dept of Joint Research Laboratory of Clinical Medicine, Fujita Health University School of Medicine, Toyoake, Japan
| | - S Motoyama
- Dept of Cardiology, Fujita Health University School of Medicine, Toyoake, Japan
| | - E Watanabe
- Dept of Cardiology, Fujita Health University School of Medicine, Toyoake, Japan
| | - H Izawa
- Dept of Cardiology, Banbuntane Hotokukai Hospital, Nagoya, Japan
| | - Y Ozaki
- Dept of Cardiology, Fujita Health University School of Medicine, Toyoake, Japan
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Muramoto Y, Fridrici V, Kapsa P, Bouvard G, Ohta M. Effects of temperature increase during surgical drilling in acrylic resin. Technol Health Care 2019; 28:369-380. [PMID: 31796714 DOI: 10.3233/thc-191870] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Acrylic resin is employed for drilling bone biomodels. Since drilling causes temperature rise, the mechanical properties of thermoplastic acrylic resin can be altered, consequently affecting drilling properties. However, it is currently unclear how this temperature increase impacts drilling. OBJECTIVE This study reports the effects of temperature rise on both mechanical and drilling properties through experiments in which acrylic resin is drilled under machining conditions employed in surgical operations. METHODS Drilling tests were performed using a surgical drill on medical acrylic resin under dry conditions to observe generated cutting chips and measure drilling properties such as torque, drilling time, and temperature rise. Dynamic mechanical analysis measurements were performed to consider temperature effects. RESULTS According to the morphological classification of the cutting chips, the drilling process is divided into three phases corresponding with the generation of cylindrical helix, waved, and rounded nubby chips respectively. During drilling, the temperature of the chips can exceed the glass transition temperature (100∘C) resulting in decreased viscoelasticity, which is associated with decreased torque. CONCLUSIONS While drilling acrylic resin under surgical machining conditions, increasing temperature can decrease torque and morphologically change cutting chips due to the decrease in mechanical properties above the glass transition temperature.
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Affiliation(s)
- Y Muramoto
- Institute of Fluid Science, Tohoku University, Sendai, Miyagi, Japan.,Graduate School of Biomedical Engineering, Tohoku University, Sendai, Miyagi, Japan.,Laboratoire de Tribologie et Dynamique des Systèmes, UMR CNRS 5513, Ecole Centrale de Lyon, Université de Lyon, Ecully cedex, France
| | - V Fridrici
- Laboratoire de Tribologie et Dynamique des Systèmes, UMR CNRS 5513, Ecole Centrale de Lyon, Université de Lyon, Ecully cedex, France
| | - Ph Kapsa
- Laboratoire de Tribologie et Dynamique des Systèmes, UMR CNRS 5513, Ecole Centrale de Lyon, Université de Lyon, Ecully cedex, France
| | - G Bouvard
- Laboratoire de Tribologie et Dynamique des Systèmes, UMR CNRS 5513, Ecole Centrale de Lyon, Université de Lyon, Ecully cedex, France
| | - M Ohta
- Institute of Fluid Science, Tohoku University, Sendai, Miyagi, Japan.,ElyTMaX UMI 3757, CNRS - Université de Lyon - Tohoku University, International Joint Unit, Tohoku University, Sendai, Miyagi, Japan
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10
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Kawai H, Motoyama S, Miyajima K, Hoshino M, Ohta M, Takahashi H, Ishii J, Muramatsu T, Sarai M, Ozaki Y. P6171Role of myocardial mass for identifying FFR-verified ischemia and determining therapeutic strategy. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0777] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Conventional noninvasive approach using coronary CT angiography (CTA) focusing on only coronary artery lesions remains mismatch in identifying functional ischemia and determining indication for coronary revascularization.
Purpose
We aimed to assess the usefulness of CT-verified myocardial mass for identifying FFR-verified myocardial ischemia and determining the indication of coronary revascularization after FFR examination.
Methods
We examined 244 vessels with intermediate stenoses (50 to 90% stenosis visually on CTA) in 216 patients (mean age 69.2±9.2, 166 men) who underwent both coronary CTA and invasive FFR. In addition to coronary stenosis severity and plaque characteristics on visual, minimal lumen diameter (MLD), minimal lumen area (MLA), plaque volume, the entire myocardial volume of the target vessel (MTV) and that exposed to ischemia (FFR ≤0.80) (myocardial volume of ischemia: MVI) were evaluated. Additionally, therapeutic strategy after FFR was recorded.
Results
Of 244 vessels, myocardial ischemia (FFR ≤0.80) was shown in 99 (40.6%). MTV was larger in the patients with FFR-verified ischemia than those without (53.3±19.2 vs. 41.5±21.6, P<0.001); MLA, plaque burden (PB) and percentage of aggregated plaque volume (%APV) were also associated with ischemia. The area under the curves (AUCs) of MLA, PB, %APV, and MTV were 0.69, 0.67, 0.64, and 0.71, respectively. Addition of MTV to a model with coronary stenosis on visual, MLA, PB, and %APV improved C-index (from 0.72 to 0.79, P<0.01), net reclassification improvement (NRI) (0.71, P<0.01), and integrated discrimination improvement (IDI) (0.10, P<0.01). Of 99 vessels with FFR ≤0.80, MVI was larger in the vessels with early revascularization after FFR than those without (38.8 vs. 29.1, P=0.01).
Conclusions
The measurement of myocardial mass improves the diagnostic performance of coronary CTA for the identification of coronary arteries with FFR-verified ischemia. Furthermore, it is associated with therapeutic strategy for the diseased vessels after FFR examination.
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Affiliation(s)
- H Kawai
- Fujita Health University, Department of Cardiology, Toyoake, Japan
| | - S Motoyama
- Fujita Health University, Department of Cardiology, Toyoake, Japan
| | - K Miyajima
- Fujita Health University, Department of Cardiology, Toyoake, Japan
| | - M Hoshino
- Fujita Health University, Department of Cardiology, Toyoake, Japan
| | - M Ohta
- Fujita Health University, Department of Cardiology, Toyoake, Japan
| | - H Takahashi
- Fujita Health University, Department of Cardiology, Toyoake, Japan
| | - J Ishii
- Fujita Health University, Department of Cardiology, Toyoake, Japan
| | - T Muramatsu
- Fujita Health University, Department of Cardiology, Toyoake, Japan
| | - M Sarai
- Fujita Health University, Department of Cardiology, Toyoake, Japan
| | - Y Ozaki
- Fujita Health University, Department of Cardiology, Toyoake, Japan
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11
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Azuma N, Ohta M, Kageyama Y, Kawanaka Y, Matsui K. Delayed onset of metronidazole-induced encephalopathy in a patient with systemic sclerosis accompanied by intestinal pseudo-obstruction. Scand J Rheumatol 2019; 49:77-79. [PMID: 31307267 DOI: 10.1080/03009742.2019.1615123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- N Azuma
- Division of Rheumatology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
| | - M Ohta
- Department of Neurology, Hyogo Prefectural Amagasaki General Medical Center, Amagasaki, Japan
| | - Y Kageyama
- Department of Neurology, Hyogo Prefectural Amagasaki General Medical Center, Amagasaki, Japan
| | - Y Kawanaka
- Department of Radiology, Hyogo College of Medicine, Nishinomiya, Japan
| | - K Matsui
- Division of Rheumatology, Department of Internal Medicine, Hyogo College of Medicine, Nishinomiya, Japan
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12
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Tauchi H, Yahagi K, Yamauchi T, Hara T, Yamaoka R, Tsukuda N, Watanabe Y, Tajima S, Ochi F, Iwata H, Ohta M, Ishii E, Matsumoto S, Matsuki T. Gut microbiota development of preterm infants hospitalised in intensive care units. Benef Microbes 2019; 10:641-651. [PMID: 31179713 DOI: 10.3920/bm2019.0003] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Gut microbiome development affects infant health and postnatal physiology. The gut microbe assemblages of preterm infants have been reported to be different from that of healthy term infants. However, the patterns of ecosystem development and inter-individual differences remain poorly understood. We investigated hospitalised preterm infant gut microbiota development using 16S rRNA gene amplicons and the metabolic profiles of 268 stool samples obtained from 17 intensive care and 42 term infants to elucidate the dynamics and equilibria of the developing microbiota. Infant gut microbiota were predominated by Gram-positive cocci, Enterobacteriaceae or Bifidobacteriaceae, which showed sequential transitions to Bifidobacteriaceae-dominated microbiota. In neonatal intensive care unit preterm infants (NICU preterm infants), Staphylococcaceae abundance was higher immediately after birth than in healthy term infants, and Bifidobacteriaceae colonisation tended to be delayed. No specific NICU-cared infant enterotype-like cluster was observed, suggesting that the constrained environment only affected the pace of transition, but not infant gut microbiota equilibrium. Moreover, infants with Bifidobacteriaceae-dominated microbiota showed higher acetate concentrations and lower pH, which have been associated with host health. Our data provides an in-depth understanding of gut microbiota development in NICU preterm infants and complements earlier studies. Understanding the patterns and inter-individual differences of the preterm infant gut ecosystem is the first step towards controlling the risk of diseases in premature infants by targeting intestinal microbiota.
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Affiliation(s)
- H Tauchi
- Department of Pediatrics, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan
| | - K Yahagi
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - T Yamauchi
- Department of Pediatrics, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan
| | - T Hara
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - R Yamaoka
- Department of Pediatrics, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan
| | - N Tsukuda
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - Y Watanabe
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - S Tajima
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - F Ochi
- Department of Pediatrics, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan
| | - H Iwata
- Department of Pediatrics, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan
| | - M Ohta
- Department of Pediatrics, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan
| | - E Ishii
- Department of Pediatrics, Ehime University Graduate School of Medicine, Toon, Ehime 791-0295, Japan
| | - S Matsumoto
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
| | - T Matsuki
- Yakult Central Institute, 5-11 Izumi, Kunitachi-shi, Tokyo 186-8650, Japan
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13
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Midorikawa T, Hikihara Y, Ohta M, Ando T, Torii S, Sakamoto S, Tanaka S. The relationship between organ-tissue body composition and resting energy expenditure in prepubertal children. Eur J Clin Nutr 2018; 73:1149-1154. [PMID: 30349140 PMCID: PMC6760636 DOI: 10.1038/s41430-018-0344-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 09/27/2018] [Accepted: 10/03/2018] [Indexed: 11/09/2022]
Abstract
BACKGROUND/OBJECTIVES In this study, we ascertained the relationship between resting energy expenditure (REE) obtained using two procedures: indirect calorimetry and from organ-tissue mass, calculated employing magnetic resonance imaging (MRI), and adult metabolic rate constants, in prepubertal children. Differences between the measured and the calculated REEs were assessed according to age at puberty approaching stage. SUBJECTS/METHODS We recruited 6-12 years old 110 healthy Japanese prepubertal children (40 girls and 70 boys). Organ-tissue masses for different organs (skeletal muscle, liver, kidneys, brain and adipose tissue) were determined using MRI and dual-energy X-ray absorptiometry. Heart and residual masses were calculated on the basis of each equation. REE was measured using the Douglas bag technique (measured REE). On the other hand, calculated REE was obtained by multiplying the sum of body compartments with the corresponding adult tissue respiration rate. RESULTS The measured REE was significantly greater than the calculated REE in both, boys and girls, although a significant association was noticed between the two REEs in both the sexes. Besides, correlation between age and difference in the two REEs was found to be significant only in girls. CONCLUSIONS The present study revealed that: (1) measured and calculated REEs differ by approximately 300 kcal/day in a relatively large sample of prepubertal children, and (2) the difference in organ-tissue mass between the measured and calculated REEs increased from approximately 200 to 400 kcal/day during the developmental process in girls but not in boys.
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Affiliation(s)
- Taishi Midorikawa
- College of Health and Welfare, J.F. Oberlin University, 3758 Tokiwamachi, Machida, Tokyo, 194-0294, Japan. .,Waseda Institute for Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan. .,Department of Nutrition and Metabolism, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8636, Japan.
| | - Yuki Hikihara
- Department of Nutrition and Metabolism, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8636, Japan.,Faculty of Creative Engineering, Chiba Institute of Technology, 2-1-1 Shibazono, Narashino, Chiba, 275-0023, Japan
| | - Megumi Ohta
- School of International Liberal Studies, Chukyo University, 101 Tokodachi, Kaizu-cho, Toyota, Aichi, 470-0393, Japan
| | - Takafumi Ando
- Department of Nutrition and Metabolism, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8636, Japan
| | - Suguru Torii
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan
| | - Shizuo Sakamoto
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama, 359-1192, Japan
| | - Shigeho Tanaka
- Department of Nutrition and Metabolism, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, 1-23-1 Toyama, Shinjuku-ku, Tokyo, 162-8636, Japan
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14
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Silman C, Matsumoto S, Mori H, Yamada Y, Otsuka A, Hongo N, Ohta M, Inomata M, Takaki H, Fukuzawa K. Evaluation of the fat plane of the pancreatic groove using multidetector CT. Clin Radiol 2018; 73:910.e7-910.e13. [DOI: 10.1016/j.crad.2018.06.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 06/04/2018] [Indexed: 01/28/2023]
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15
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Kawai H, Ohta M, Motoyama S, Hashimoto Y, Nagahara Y, Hoshino M, Miyajima K, Ishikawa M, Okumura M, Naruse H, Takahashi H, Ishii J, Muramatsu T, Sarai M, Ozaki Y. 6182Does myocardial bridge assessed by coronary CT angiography predict vasospasm of left anterior descending? Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.6182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- H Kawai
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - M Ohta
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - S Motoyama
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - Y Hashimoto
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - Y Nagahara
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - M Hoshino
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - K Miyajima
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - M Ishikawa
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - M Okumura
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - H Naruse
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - H Takahashi
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - J Ishii
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - T Muramatsu
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - M Sarai
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
| | - Y Ozaki
- Department of Cardiology, Fujita Health University Hospital, Toyoake, Japan
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16
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Midorikawa T, Ohta M, Torii S, Sakamoto S. Lean Soft Tissue Mass Measured Using Dual-Energy X-Ray Absorptiometry Is an Effective Index for Assessing Change in Leg Skeletal Muscle Mass Following Exercise Training. J Clin Densitom 2018; 21:394-398. [PMID: 29703658 DOI: 10.1016/j.jocd.2018.03.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 03/26/2018] [Indexed: 11/24/2022]
Abstract
It is difficult to precisely and easily estimate the changes in skeletal muscle mass (SMM) following exercise training. We aimed to assess whether the change in lean soft tissue mass measured using dual-energy X-ray absorptiometry (DXA) reflects the change in SMM measured using magnetic resonance imaging (MRI) following exercise training in both the leg and trunk regions. Anthropometry, DXA, and MRI measurements of the trunk and leg regions were obtained in 10 male college sumo wrestlers before and after exercise training (mean duration between measurements: ~2 yr). Contiguous magnetic resonance images with 1-cm slice thickness and without gap were obtained from the first cervical vertebra to the ankle joints as reference data. Skeletal muscle volume was calculated from the summation of the digitized cross-sectional areas. The volume measurements were converted into mass by using an assumed skeletal muscle density (1.041 g/cm3). Trunk and leg areas, using DXA regional computer-generated lines, were adjusted to coincide with each discrete region by using MRI. Although the change in the DXA-measured lean soft tissue mass in the trunk region was significantly different from that of the MRI-measured SMM (Cohen's d = -1.3145, concordance correlation coefficient = 0.26, p < 0.01), the changes were similar in the leg region (Cohen's d = 0.07, concordance correlation coefficient = 0.87, p = 0.88). The exercise training-induced change in lean soft tissue mass significantly correlated with that in SMM, both in the leg (r = 0.88, p < 0.01) and trunk (r = 0.64, p < 0.05) regions. Bland-Altman analysis did not indicate a bias for the changes in leg lean soft tissue mass and SMM following exercise training. These results suggest that lean soft tissue mass measured using DXA is an effective index for assessing change in leg SMM following exercise training.
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Affiliation(s)
- Taishi Midorikawa
- College of Health and Welfare, J.F. Oberlin University, Machida, Tokyo, Japan; Waseda Institute for Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan.
| | - Megumi Ohta
- School of International Liberal Studies, Chukyo University, Toyota, Aichi, Japan
| | - Suguru Torii
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan
| | - Shizuo Sakamoto
- Faculty of Sport Sciences, Waseda University, Tokorozawa, Saitama, Japan
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17
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Sawazaki T, Nakajima Y, Urai T, Mukai K, Ohta M, Kato I, Kawaguchi A, Kinoshita Y, Kumagai Y, Sakashita A, Yamazaki A, Nakatani T. Efficacy of Honeydew Honey and Blossom Honey on Full-thickness Wound Healing in Mice. Wounds 2018; 30:197-204. [PMID: 29718813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
INTRODUCTION The wound healing properties of honey, including blossom honey, are well known; however, the effects of honeydew honey during the wound healing process have not yet been investigated and thus remain unclear. OBJECTIVE This study compares the effects of honeydew honey with those of blossom honey. MATERIALS AND METHODS A total of 140 mice were divided into 2 control groups, which received either a hydrocolloid dressing (HCD; n = 22) or gauze (n = 22), and 4 experimental groups: honeydew honey (n = 23), Acacia honey (n = 23), Manuka honey (n = 22), and Japanese Pharmacopoeia honey (n = 28). Two circular full-thickness wounds were made and measured for 14 days. Each wound in the experimental groups was treated with 0.1 mL of honey and covered with gauze. Dressings in the control and experimental groups were changed daily. RESULTS The wounds in all of the honey groups and the HCD group were moist by day 14, while those in the gauze group were dry. The ratio of wound area to initial wound area and the number of inflammatory cells decreased during the inflammatory phase in all honey groups. However, the honey groups exhibited reepithelialization rates of < 40%, numerous neutrophils, weak wound contraction, and impaired collagen deposition in wounds after day 11. CONCLUSIONS These results suggest honeydew honey and blossom honey both exert anti-inflammatory effects during the inflammatory phase. However, all of the honeys examined were less effective at promoting full-thickness wound healing than the controls. Further studies are warranted.
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Affiliation(s)
- Takuto Sawazaki
- Department of Clinical Nursing, Graduate Course of Nursing Science, Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Yukari Nakajima
- Department of Clinical Nursing, Graduate Course of Nursing Science, Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Tamae Urai
- Department of Clinical Nursing, Graduate Course of Nursing Science, Division of Health Sciences, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan
| | - Kanae Mukai
- Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
| | - Megumi Ohta
- Division of Nursing, Faculty of Health Sciences, Kanazawa University
| | - Ikuko Kato
- Division of Nursing, Faculty of Health Sciences, Kanazawa University
| | - Azusa Kawaguchi
- Division of Nursing, Faculty of Health Sciences, Kanazawa University
| | - Yui Kinoshita
- Division of Nursing, Faculty of Health Sciences, Kanazawa University
| | - Yuri Kumagai
- Division of Nursing, Faculty of Health Sciences, Kanazawa University
| | - Ayaka Sakashita
- Division of Nursing, Faculty of Health Sciences, Kanazawa University
| | - Asuka Yamazaki
- Division of Nursing, Faculty of Health Sciences, Kanazawa University
| | - Toshio Nakatani
- Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
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18
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Ohta M, Nakao N, Kuribayashi S, Hayashizaki N. Verification of evaluation accuracy of absorbed dose in the dose-evaluation system for iridium-192 brachytherapy for treatment of keloids. Biomed Phys Eng Express 2018. [DOI: 10.1088/2057-1976/aa9d76] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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19
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Tsuchida N, Nakashima M, Kato M, Heyman E, Inui T, Haginoya K, Watanabe S, Chiyonobu T, Morimoto M, Ohta M, Kumakura A, Kubota M, Kumagai Y, Hamano SI, Lourenco CM, Yahaya NA, Ch'ng GS, Ngu LH, Fattal-Valevski A, Weisz Hubshman M, Orenstein N, Marom D, Cohen L, Goldberg-Stern H, Uchiyama Y, Imagawa E, Mizuguchi T, Takata A, Miyake N, Nakajima H, Saitsu H, Miyatake S, Matsumoto N. Detection of copy number variations in epilepsy using exome data. Clin Genet 2018; 93:577-587. [PMID: 28940419 DOI: 10.1111/cge.13144] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 09/12/2017] [Accepted: 09/17/2017] [Indexed: 12/14/2022]
Abstract
Epilepsies are common neurological disorders and genetic factors contribute to their pathogenesis. Copy number variations (CNVs) are increasingly recognized as an important etiology of many human diseases including epilepsy. Whole-exome sequencing (WES) is becoming a standard tool for detecting pathogenic mutations and has recently been applied to detecting CNVs. Here, we analyzed 294 families with epilepsy using WES, and focused on 168 families with no causative single nucleotide variants in known epilepsy-associated genes to further validate CNVs using 2 different CNV detection tools using WES data. We confirmed 18 pathogenic CNVs, and 2 deletions and 2 duplications at chr15q11.2 of clinically unknown significance. Of note, we were able to identify small CNVs less than 10 kb in size, which might be difficult to detect by conventional microarray. We revealed 2 cases with pathogenic CNVs that one of the 2 CNV detection tools failed to find, suggesting that using different CNV tools is recommended to increase diagnostic yield. Considering a relatively high discovery rate of CNVs (18 out of 168 families, 10.7%) and successful detection of CNV with <10 kb in size, CNV detection by WES may be able to surrogate, or at least complement, conventional microarray analysis.
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Affiliation(s)
- N Tsuchida
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Department of Stem Cell and Immune Regulation, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - M Nakashima
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Department of Biochemistry, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - M Kato
- Department of Pediatrics, Yamagata University Faculty of Medicine, Yamagata, Japan.,Department of Pediatrics, Showa University School of Medicine, Tokyo, Japan
| | - E Heyman
- Pediatric Neurology Department Pediatric Epilepsy Service, Assaf Harofeh Medical Center, Zerifin, Israel
| | - T Inui
- Department of Neurology, Miyagi Children's Hospital, Sendai, Japan
| | - K Haginoya
- Department of Neurology, Miyagi Children's Hospital, Sendai, Japan
| | - S Watanabe
- Department of Neurology, Miyagi Children's Hospital, Sendai, Japan
| | - T Chiyonobu
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - M Morimoto
- Department of Pediatrics, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - M Ohta
- Department of Pediatrics, JA Toride General Hospital, Toride, Ibaraki, Japan
| | - A Kumakura
- Department of Pediatrics, Kitano Hospital, The Tazuke Kofukai Medical Research Institute, Osaka, Japan
| | - M Kubota
- Division of Neurology, National Center for Child Health and Development, Tokyo, Japan
| | - Y Kumagai
- Division of Neurology, Saitama Children's Medical Center, Saitama, Japan
| | - S-I Hamano
- Division of Neurology, Saitama Children's Medical Center, Saitama, Japan
| | - C M Lourenco
- Neurogenetics Unit, School of Medicine of Ribeirao Preto, University of Sao Paulo, Sao Paulo, Brazil
| | - N A Yahaya
- Hospital Raja Perempuan Zainab II, Kota Bharu, Malaysia
| | - G-S Ch'ng
- Genetic Department, Hospital Kuala Lumpur, Kuala Lumpur, Malaysia
| | - L-H Ngu
- Genetic Department, Hospital Kuala Lumpur, Kuala Lumpur, Malaysia
| | - A Fattal-Valevski
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Neurology Unit, Dana-Dwek Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - M Weisz Hubshman
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Raphael Recanati Genetics Institute, Rabin Medical Center, Petach Tikva, Israel
| | - N Orenstein
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
| | - D Marom
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Pediatrics A, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
| | - L Cohen
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
| | - H Goldberg-Stern
- Epilepsy Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel
| | - Y Uchiyama
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - E Imagawa
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - T Mizuguchi
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - A Takata
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - N Miyake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - H Nakajima
- Department of Stem Cell and Immune Regulation, Yokohama City University Graduate School of Medicine, Yokohama, Japan
| | - H Saitsu
- Department of Biochemistry, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - S Miyatake
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan.,Clinical Genetics Department, Yokohama City University Hospital, Yokohama, Japan
| | - N Matsumoto
- Department of Human Genetics, Yokohama City University Graduate School of Medicine, Yokohama, Japan
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Maniwa T, Shintani Y, Okami J, Ohta M, Takeuchi Y, Takami K, Yokouchi H, Kurokawa E, Kanzaki R, Sakamaki Y, Shiono H, Iwasaki T, Nishioka K, Kodama K, Okumura M. MA 17.04 Initial Surgery in Patients with Clinical N2 Non-Small Cell Lung Cancer: A Multi-Institution Retrospective Study. J Thorac Oncol 2017. [DOI: 10.1016/j.jtho.2017.09.612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Kurashige T, Sumi N, Kanbara T, Ohta M, Sugiura T, Maruyama H, Torii T. Anti-HMGCR antibody positive myopathy shows bcl-2-positive lymphocyte follicles. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sumi N, Kurashige T, Sueda Y, Ohta M, Kambara T, Sugiura T, Torii T. EGFR mutation and ALK fusion oncogene decrease stroke risk in patient with trousseau syndrome due to lung adenocarcinoma. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.2827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Takahashi S, Nakamura M, Yonekura Y, Tanaka F, Tanno K, Ohsawa M, Itai K, Omama S, Ishibashi Y, Ogasawara K, Sakata K, Ohta M, Okayama A. P3454A comparison of the predictive ability of cardiovascular biomarkers for requiring long-term care service due to physical and cognitive impairments in an elderly general population. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S. Takahashi
- Iwate Medical University, Division of Cardioangiology, Department of Internal Medicine, Morioka, Japan
| | - M. Nakamura
- Iwate Medical University, Division of Cardioangiology, Department of Internal Medicine, Morioka, Japan
| | - Y. Yonekura
- St. Luke's International University, Graduate School of Nursing Science, Tokyo, Japan
| | - F. Tanaka
- Iwate Medical University, Division of Cardioangiology, Department of Internal Medicine, Morioka, Japan
| | - K. Tanno
- Iwate University Hospital, Department of Hygiene and Preventive Medicine, Iwate, Japan
| | - M. Ohsawa
- Morioka Tsunagi Onsen Hospital, Morioka, Japan
| | - K. Itai
- Morioka University, Department of Nutritional Sciences, Kakizawa, Japan
| | - S. Omama
- Iwate Medical University, Department of Neurosurgery, Morioka, Japan
| | - Y. Ishibashi
- Iwate Medical University, Division of Cardioangiology, Department of Internal Medicine, Morioka, Japan
| | - K. Ogasawara
- Iwate Medical University, Department of Neurosurgery, Morioka, Japan
| | - K. Sakata
- Iwate University Hospital, Department of Hygiene and Preventive Medicine, Iwate, Japan
| | - M. Ohta
- Iwate Health Service Association, Morioka, Japan
| | - A. Okayama
- Research Institute of Strategy for Prevention, Tokyo, Japan
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Tamaki K, Koshiyama M, Ohta M, Ohsawa M. P4610Prevalence rates of atrial fibrillation tentatively increased during and after the Great East Japan earthquake. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p4610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Affiliation(s)
- H. Hasegawa
- Kyushu University, Department of Nuclear Engineering Hakozaki, Higashi-ku, Fukuoka 812, Japan
| | - H. Nakashima
- Kyushu University, Department of Nuclear Engineering Hakozaki, Higashi-ku, Fukuoka 812, Japan
| | - T. Matsui
- Kyushu University, Department of Nuclear Engineering Hakozaki, Higashi-ku, Fukuoka 812, Japan
| | - M. Ohta
- Kyushu University, Department of Nuclear Engineering Hakozaki, Higashi-ku, Fukuoka 812, Japan
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26
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Koami H, Sakamoto Y, Yamada KC, Matsuda T, Nishi J, Nakayama K, Sakurai R, Ohta M, Imahase H, Yahata M, Umeka M, Miike T, Nagashima F, Iwamura T, Inoue S. What factor within the Japanese Association for Acute Medicine (JAAM) disseminated intravascular coagulation (DIC) criteria is most strongly correlated with trauma induced DIC? A retrospective study using thromboelastometry in a single center in Japan. Eur J Trauma Emerg Surg 2017; 43:431-438. [PMID: 28093623 PMCID: PMC5533846 DOI: 10.1007/s00068-016-0756-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Accepted: 12/23/2016] [Indexed: 11/26/2022]
Abstract
Purpose The diagnostic criteria for disseminated intravascular coagulation (DIC) established by the Japanese Association for Acute Medicine (JAAM) is able to diagnose DIC accurately and promptly. The aim of this retrospective study is to evaluate the degree of association between each parameter of JAAM DIC criteria and the diagnosis of trauma induced DIC (T-DIC) utilizing thromboelastometry (ROTEM). Methods Trauma patients transported to our hospital with ROTEM performed in the emergency department between January 2013 and December 2015 were enrolled in this study. We evaluated (1) the characteristics of T-DIC, (2) the relationships between T-DIC and each parameter of the JAAM DIC criteria and (3) the diagnostic accuracies of each parameter for T-DIC by statistical measurement. Results All 72 patients (21 T-DIC and 51 control) were included in primary analysis. T-DIC was significantly related to younger age, more severe trauma scores, more cases of massive transfusions, and remarkable coagulation abnormality detected by standard coagulation tests. In the cases of T-DIC, ROTEM showed longer clotting time, lower acceleration, lower clot firmness, and inhibited fibrinolysis in EXTEM/INTEM. Within the JAAM DIC score, PT-INR ≥1.2 was the most accurate factor for T-DIC diagnosis; sensitivity 60.0%, specificity 100.0%, and accuracy 88.7%. PT-INR ≥1.2 was statistically correlated with the JAAM DIC score (p < 0.001, r = 0.709). The univariate analysis based on 1.2 of PT-INR indicated statistical differences in most categories of ROTEM, which is similar to analysis performed for the presence and absence of T-DIC. Conclusions Among JAAM DIC criteria, the PT-INR ≥1.2 was the most accurate factor for both the diagnosis of T-DIC and the evaluation of its severity.
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Affiliation(s)
- H Koami
- Department of Emergency and Critical Care Medicine, Faculty of Medicine, Saga University, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan.
| | - Y Sakamoto
- Department of Emergency and Critical Care Medicine, Faculty of Medicine, Saga University, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - K C Yamada
- Advanced Emergency Care Center, Saga University Hospital, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - T Matsuda
- Advanced Emergency Care Center, Saga University Hospital, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - J Nishi
- Advanced Emergency Care Center, Saga University Hospital, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - K Nakayama
- Advanced Emergency Care Center, Saga University Hospital, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - R Sakurai
- Advanced Emergency Care Center, Saga University Hospital, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - M Ohta
- Advanced Emergency Care Center, Saga University Hospital, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - H Imahase
- Advanced Emergency Care Center, Saga University Hospital, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - M Yahata
- Advanced Emergency Care Center, Saga University Hospital, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - M Umeka
- Advanced Emergency Care Center, Saga University Hospital, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - T Miike
- Advanced Emergency Care Center, Saga University Hospital, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - F Nagashima
- Advanced Emergency Care Center, Saga University Hospital, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - T Iwamura
- Department of Emergency and Critical Care Medicine, Faculty of Medicine, Saga University, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
| | - S Inoue
- Division of Trauma Surgery and Surgical Critical Care, Faculty of Medicine, Saga University, 5-1-1, Nabeshima, Saga City, Saga, 8498501, Japan
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Ohta M, Midorikawa T, Hikihara Y, Masuo Y, Sakamoto S, Torii S, Kawakami Y, Fukunaga T, Kanehisa H. Validity of segmental bioelectrical impedance analysis for estimating fat-free mass in children including overweight individuals. Appl Physiol Nutr Metab 2016; 42:157-165. [PMID: 28112969 DOI: 10.1139/apnm-2016-0137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This study examined the validity of segmental bioelectrical impedance (BI) analysis for predicting the fat-free masses (FFMs) of whole-body and body segments in children including overweight individuals. The FFM and impedance (Z) values of arms, trunk, legs, and whole body were determined using a dual-energy X-ray absorptiometry and segmental BI analyses, respectively, in 149 boys and girls aged 6 to 12 years, who were divided into model-development (n = 74), cross-validation (n = 35), and overweight (n = 40) groups. Simple regression analysis was applied to (length)2/Z (BI index) for each of the whole-body and 3 segments to develop the prediction equations of the measured FFM of the related body part. In the model-development group, the BI index of each of the 3 segments and whole body was significantly correlated to the measured FFM (R2 = 0.867-0.932, standard error of estimation = 0.18-1.44 kg (5.9%-8.7%)). There was no significant difference between the measured and predicted FFM values without systematic error. The application of each equation derived in the model-development group to the cross-validation and overweight groups did not produce significant differences between the measured and predicted FFM values and systematic errors, with an exception that the arm FFM in the overweight group was overestimated. Segmental bioelectrical impedance analysis is useful for predicting the FFM of each of whole-body and body segments in children including overweight individuals, although the application for estimating arm FFM in overweight individuals requires a certain modification.
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Affiliation(s)
- Megumi Ohta
- a School of International Liberal Studies, Chukyo University 101 Tokodachi, Kaizu-cho, Toyota-shi, Aichi 470-0393, Japan
| | - Taishi Midorikawa
- b College of Health and Welfare, J.F. Oberlin University 3758 Tokiwa-machi, Machida-shi, Tokyo 194-0294, Japan
| | - Yuki Hikihara
- c Faculty of Engineering, Chiba Institute of Technology, 2-1-1 Shibazono, Narashino-shi, Chiba 275-0023, Japan
| | - Yoshihisa Masuo
- d National Institute of Fitness and Sports in Kanoya 1 Shiromizu, Kanoya-shi, Kagoshima 891-2311, Japan
| | - Shizuo Sakamoto
- e Faculty of Sport Sciences, Waseda University 2-579-15 Mikajima, Tokorozawa-shi, Saitama 359-1192, Japan
| | - Suguru Torii
- e Faculty of Sport Sciences, Waseda University 2-579-15 Mikajima, Tokorozawa-shi, Saitama 359-1192, Japan
| | - Yasuo Kawakami
- e Faculty of Sport Sciences, Waseda University 2-579-15 Mikajima, Tokorozawa-shi, Saitama 359-1192, Japan
| | - Tetsuo Fukunaga
- d National Institute of Fitness and Sports in Kanoya 1 Shiromizu, Kanoya-shi, Kagoshima 891-2311, Japan
| | - Hiroaki Kanehisa
- d National Institute of Fitness and Sports in Kanoya 1 Shiromizu, Kanoya-shi, Kagoshima 891-2311, Japan
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Kaneko Y, Kondo H, Ohta M, Takeuchi T. FRI0104 Long-Term Followup of Biologic Agents in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2016. [DOI: 10.1136/annrheumdis-2016-eular.3339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Midorikawa T, Tanaka S, Ando T, Tanaka C, Masayuki K, Ohta M, Torii S, Sakamoto S. Is There a Chronic Elevation in Organ-Tissue Sleeping Metabolic Rate in Very Fit Runners? Nutrients 2016. [PMCID: PMC4848665 DOI: 10.3390/nu8040196] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
It is unclear whether the resting metabolic rate of individual organ-tissue in adults with high aerobic fitness is higher than that in untrained adults; in fact, this topic has been debated for years using a two-component model. To address this issue, in the present study, we examined the relationship between the measured sleeping energy expenditure (EE) by using an indirect human calorimeter (IHC) and the calculated resting EE (REE) from organ-tissue mass using magnetic resonance imaging, along with the assumed metabolic rate constants in healthy adults. Seventeen healthy male long-distance runners were recruited and grouped according to the median V·O2peak: very fit group (>60 mL/min/kg; n = 8) and fit group (<60 mL/min/kg; n = 9). Participants performed a graded exercise test for determining V·O2peak; X-ray absorptiometry and magnetic resonance imaging were used to determine organ-tissue mass, and IHC was used to determine sleeping EE. The calculated REE was estimated as the sum of individual organ-tissue masses multiplied by their metabolic rate constants. No significant difference was observed in the measured sleeping EE, calculated REE, and their difference, as well as in the slopes and intercepts of the two regression lines between the groups. Moreover, no significant correlation between V·O2peak and the difference in measured sleeping EE and calculated REE was observed for all subjects. Thus, aerobic endurance training does not result in a chronic elevation in the organ-tissue metabolic rate in cases with V·O2peak of approximately 60 mL/min/kg.
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Affiliation(s)
- Taishi Midorikawa
- College of Health and Welfare, J.F. Oberlin University, 3758 Tokiwamachi, Machida, Tokyo 194-0294, Japan;
- Correspondence: ; Tel.: +81-42-797-8426
| | - Shigeho Tanaka
- Department of Nutritional Science, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8636, Japan; (S.T.); (T.A.)
| | - Takafumi Ando
- Department of Nutritional Science, National Institute of Health and Nutrition, National Institutes of Biomedical Innovation, Health and Nutrition, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8636, Japan; (S.T.); (T.A.)
| | - Chiaki Tanaka
- College of Health and Welfare, J.F. Oberlin University, 3758 Tokiwamachi, Machida, Tokyo 194-0294, Japan;
| | - Konishi Masayuki
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192, Japan; (K.M.); (S.T.); (S.S.)
| | - Megumi Ohta
- School of International Liberal Studies, Chukyo University, 101 Tokodachi, Kaizu-cho, Toyota, Aichi 470-0393, Japan;
| | - Suguru Torii
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192, Japan; (K.M.); (S.T.); (S.S.)
| | - Shizuo Sakamoto
- Faculty of Sport Sciences, Waseda University, 2-579-15 Mikajima, Tokorozawa, Saitama 359-1192, Japan; (K.M.); (S.T.); (S.S.)
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Wakuno A, Aoki M, Kushiro A, Mae N, Kodaira K, Maeda T, Yamazaki Y, Ohta M. Comparison of alfaxalone, ketamine and thiopental for anaesthetic induction and recovery in Thoroughbred horses premedicated with medetomidine and midazolam. Equine Vet J 2016; 49:94-98. [PMID: 26850885 DOI: 10.1111/evj.12548] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 11/25/2015] [Indexed: 11/28/2022]
Abstract
REASONS FOR PERFORMING STUDY There is limited information on clinical use of the new injectable anaesthetic agent alfaxalone in Thoroughbred horses. OBJECTIVES To compare anaesthetic induction and recovery characteristics and cardiopulmonary responses between alfaxalone, ketamine and thiopental in Thoroughbred horses premedicated with medetomidine and midazolam. STUDY DESIGN Randomised blinded experimental cross-over study. METHODS Six Thoroughbred horses were anaesthetised 3 times with alfaxalone 1 mg/kg bwt, ketamine 2.5 mg/kg bwt or thiopental 4 mg/kg bwt after premedication with medetomidine 6 μg/kg bwt and midazolam 20 μg/kg bwt. Qualities of anaesthetic induction and recovery were scored on a scale of 1 (poor) to 5 (excellent). Induction time and recovery time were recorded. Cardiopulmonary values (heart rate, respiratory rate, arterial blood pressures, and arterial blood gases) were recorded throughout anaesthesia. Data were analysed with nonparametric methods. RESULTS The anaesthetic induction (P = 0.2) and recovery (P = 0.1) quality scores (median, range) were not different amongst protocols and were 4.0, 3-5; 5.0, 4-5; 4.5, 3-5; and 4.5, 3-5; 3.5, 2-5; 4.0, 2-5 for alfaxalone, ketamine and thiopental, respectively. Induction time for ketamine (67, 53-89 s) was significantly longer than that for alfaxalone (49, 40-51 s, P = 0.01) and thiopental (48, 43-50 s, P = 0.01). Time to standing for alfaxalone (44, 40-63 min, P = 0.01) and thiopental (39, 30-58 min, P = 0.01) was significantly longer than that for ketamine (25, 18-26 min). Cardiovascular values were maintained within the clinically acceptable level throughout anaesthesia. Respiratory rate significantly decreased during anaesthesia for all 3 drugs; however, spontaneous breathing did not disappear, and PaCO2 values were maintained at approximately 50 mmHg. CONCLUSIONS All 3 drugs showed similar effects in relation to anaesthetic induction and recovery qualities and cardiopulmonary responses. However, alfaxalone and thiopental prolonged recovery time compared with ketamine.
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Affiliation(s)
- A Wakuno
- Racehorse Clinic, Miho Training Center, Japan Racing Association, Inashiki-gun, Ibaraki, Japan
| | - M Aoki
- Racehorse Clinic, Miho Training Center, Japan Racing Association, Inashiki-gun, Ibaraki, Japan
| | - A Kushiro
- Racehorse Clinic, Miho Training Center, Japan Racing Association, Inashiki-gun, Ibaraki, Japan
| | - N Mae
- Racehorse Clinic, Miho Training Center, Japan Racing Association, Inashiki-gun, Ibaraki, Japan
| | - K Kodaira
- Racehorse Clinic, Miho Training Center, Japan Racing Association, Inashiki-gun, Ibaraki, Japan
| | - T Maeda
- Racehorse Clinic, Miho Training Center, Japan Racing Association, Inashiki-gun, Ibaraki, Japan
| | - Y Yamazaki
- Racehorse Clinic, Miho Training Center, Japan Racing Association, Inashiki-gun, Ibaraki, Japan
| | - M Ohta
- Racehorse Clinic, Miho Training Center, Japan Racing Association, Inashiki-gun, Ibaraki, Japan
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Anzai H, Yoshida Y, Sugiyama S, Endo H, Matsumoto Y, Ohta M. Porosity dependency of an optimized stent design for an intracranial aneurysm. Technol Health Care 2015; 23:547-56. [PMID: 26410116 DOI: 10.3233/thc-151007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Optimal design of stents for a cerebral aneurysm is desired for efficient flow reduction in the aneurysm. OBJECTIVE In this study, we aimed to optimize stent design at several porosities, estimate the influence of stent design on aneurysm flow, and evaluate the ability of stents to reduce flow. METHODS Stent models were constructed as sets of squares or rectangles in the necks of a two-dimensional (2D) and realistic aneurysm. Then, automated optimization was performed using a combination of simulated annealing and lattice Boltzmann flow simulation. RESULTS By simulated annealing, stents were gradually modified to reduce the average velocity in an aneurysm. As a result of optimization, stents of all porosities demonstrated an inhomogeneous distribution with dense struts in the inflow area. Flow reduction was increased compared with the initial stent. Under the condition of high porosity, flow reduction by the stent drastically increased as porosity decreased. Under low porosity, the increase of velocity reduction was moderate even as porosity decreased. CONCLUSIONS Optimization can enhance flow reduction by stents. However, the increase in reduction associated with decreasing porosity is moderate under lower-porosity conditions. This threshold may help in the choice of stent porosity for each specific aneurysm.
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Affiliation(s)
- H Anzai
- Frontier Research Institute of Interdisciplinary Sciences, Tohoku University, Sendai, Japan.,Institute of Fluid Science, Tohoku University, Sendai, Japan
| | - Y Yoshida
- Graduate School of Engineering, Tohoku University, Sendai, Japan
| | - S Sugiyama
- Department of Neurosurgery, Kohnan Hospital, Sendai, Japan.,Graduate School of Biomedical Engineering, Tohoku University, Sendai, Japan
| | - H Endo
- Department of Neurosurgery, Kohnan Hospital, Sendai, Japan
| | - Y Matsumoto
- Department of Neuroendovascular Therapy, Kohnan Hospital, Sendai, Japan
| | - M Ohta
- Institute of Fluid Science, Tohoku University, Sendai, Japan
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Kaneko Y, Kondo H, Ohta M, Takeuchi T. SAT0095 Identifying Factors Associated with Discordance Between Erythrocyte Sedimentation Rate and C-Reactive Protein in Patients with Rheumatoid Arthritis. Ann Rheum Dis 2015. [DOI: 10.1136/annrheumdis-2015-eular.4352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Goto M, Makihara H, Ohta M, Maseki S, Hasegawa Y, Nakanishi H, Kurita K. Biological significance and regulation of podoplanin expression in oral squamous cell carcinomas. J Oral Maxillofac Surg 2014. [DOI: 10.1016/j.joms.2014.06.328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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34
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Moriyama M, Furukawa S, Kawano S, Goto Y, Kiyoshima T, Tanaka A, Maehara T, Hayashida JN, Ohta M, Nakamura S. The diagnostic utility of biopsies from the submandibular and labial salivary glands in IgG4-related dacryoadenitis and sialoadenitis, so-called Mikulicz's disease. Int J Oral Maxillofac Surg 2014; 43:1276-81. [PMID: 25062551 DOI: 10.1016/j.ijom.2014.06.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 06/26/2014] [Accepted: 06/30/2014] [Indexed: 12/24/2022]
Abstract
IgG4-related dacryoadenitis and sialoadenitis (IgG4-DS) is characterized by serum IgG4 elevation and the infiltration of IgG4-positive plasma cells in glandular tissues. For definitive diagnosis of IgG4-DS, biopsies of local lesions are recommended to exclude Sjögren's syndrome (SS), malignant tumours, and similar disorders. In this study, we examined the diagnostic utility of submandibular gland (SMG) and labial salivary gland (LSG) biopsies in IgG4-DS. Fourteen patients presenting with swelling of the SMG (eight females and six males) underwent both SMG and LSG biopsies. The sensitivity, specificity, and accuracy of SMG biopsies were all 100.0%. In contrast, those of LSG biopsies were 69.2%, 100.0%, and 71.4%, respectively. Thirty-three out of 61 LSG biopsies (54.1%) from all 14 patients were positive for the diagnostic criteria of IgG4-DS (IgG4-positive/IgG-positive plasma cells >0.4). None of the patients experienced complications such as facial nerve palsy, sialocele, or hyposalivation. The IgG4/IgG ratio showed no significant correlation between the LSG and SMG. The final diagnosis was IgG4-DS in 13 patients and marginal zone B-cell lymphoma (MZL) in one. These results suggest that incisional biopsy of the SMG is useful and appropriate for the definitive diagnosis of IgG4-DS, while diagnosis by LSG biopsy alone requires more caution.
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Affiliation(s)
- M Moriyama
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan.
| | - S Furukawa
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - S Kawano
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - Y Goto
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - T Kiyoshima
- Laboratory of Oral Pathology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - A Tanaka
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - T Maehara
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - J-N Hayashida
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - M Ohta
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
| | - S Nakamura
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
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Furukawa S, Moriyama M, Kawano S, Tanaka A, Maehara T, Hayashida JN, Goto Y, Kiyoshima T, Shiratsuchi H, Ohyama Y, Ohta M, Imabayashi Y, Nakamura S. Clinical relevance of Küttner tumour and IgG4-related dacryoadenitis and sialoadenitis. Oral Dis 2014; 21:257-62. [PMID: 24844187 PMCID: PMC4359042 DOI: 10.1111/odi.12259] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 05/05/2014] [Accepted: 05/14/2014] [Indexed: 12/24/2022]
Abstract
Objectives Küttner tumour (KT), so-called chronic sclerosing sialoadenitis, is characterised by concomitant swelling of the submandibular glands secondary to strong lymphocytic infiltration and fibrosis independent of sialolith formation. However, recent studies have indicated that some patients with KT develop high serum levels of IgG4 and infiltration of IgG4-positive plasma cells, namely IgG4-related dacryoadenitis and sialoadenitis (IgG4-DS), so-called Mikulicz's disease. The aim of this study was to clarify the clinical and pathological associations between KT and IgG4-DS. Materials and Methods Fifty-four patients pathologically diagnosed with KT or chronic sialoadenitis were divided into two groups according to the presence or absence of sialolith (KT-S (+) or KT-S (−), respectively). Results There were no significant differences in the clinical findings, including the mean age, sex and disease duration, between the two groups. All patients in the KT-S (+) group showed unilateral swelling without infiltration of IgG4-positive plasma cells or a history of other IgG4-related diseases (IgG4-RD), while those in the KT-S (−) group showed bilateral swelling (37.5%), strong infiltration of IgG4-positive plasma cells (87.5%) and a history of other IgG4-RD (12.5%). Conclusions These results suggest an association between the pathogeneses of KT-S (−) and IgG4-DS, but not KT-S (+).
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Affiliation(s)
- S Furukawa
- Section of Oral and Maxillofacial Oncology, Division of Maxillofacial Diagnostic and Surgical Sciences, Faculty of Dental Science, Kyushu University, Fukuoka, Japan
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Ohta M, Nakamura K, Kubo T, Suzuki T. Detoxification Effect of Iron-encaging Zeolite-processed Water in Tributyltin-intoxicated Euglena gracilis Z. Biosci Biotechnol Biochem 2014; 65:14-21. [PMID: 11272817 DOI: 10.1271/bbb.65.14] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In our previous paper, we reported the restoration promoting effects of mineral-encaging zeolite-processed water, especially of a Fe-encaging one, on tributyltin chloride (TBTCl)-intoxicated Euglena gracilis. This present study extends the investigation on the behavior of TBTCl and a xenobiotic enzyme, cytochrome P-450, in Euglena cells incubated with or without Fe-encaging zeolite-processed water (FeZW). Subcellular fractionation of TBTCl-intoxicated Euglena cells, atomic absorption spectrophotometry, and GC analyses showed that TBTCl was rapidly incorporated into the cells to halt cell motility. GC-MS showed that FeZW promoted conversion of TBTCl to dibutyltin (DBT) as the major metabolite in the microsomal fraction of the cells. An in vitro incubation system with heat-treated microsomes did not convert TBTCl to DBT. The contribution of cytochrome P-450 in the microsomal fraction was suggested by an immunochemical method. The results suggest that the improvement of detoxification by FeZW in the TBT-intoxicated Euglena cells should be due to activation of biotransformation system of the Euglena cells by FeZW.
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Affiliation(s)
- M Ohta
- Department of Marine Bioresources, Faculty of Fisheries, Hokkaido University, Hakodate, Japan
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Ohyama K, Moriyama M, Hayashida JN, Tanaka A, Maehara T, Ieda S, Furukawa S, Ohta M, Imabayashi Y, Nakamura S. Saliva as a potential tool for diagnosis of dry mouth including Sjögren's syndrome. Oral Dis 2014; 21:224-31. [DOI: 10.1111/odi.12252] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 04/10/2014] [Accepted: 04/15/2014] [Indexed: 01/29/2023]
Affiliation(s)
- K Ohyama
- Section of Oral and Maxillofacial Oncology; Division of Maxillofacial Diagnostic and Surgical Sciences; Faculty of Dental Science; Kyushu University; Fukuoka Japan
| | - M Moriyama
- Section of Oral and Maxillofacial Oncology; Division of Maxillofacial Diagnostic and Surgical Sciences; Faculty of Dental Science; Kyushu University; Fukuoka Japan
| | - J-N Hayashida
- Section of Oral and Maxillofacial Oncology; Division of Maxillofacial Diagnostic and Surgical Sciences; Faculty of Dental Science; Kyushu University; Fukuoka Japan
| | - A Tanaka
- Section of Oral and Maxillofacial Oncology; Division of Maxillofacial Diagnostic and Surgical Sciences; Faculty of Dental Science; Kyushu University; Fukuoka Japan
| | - T Maehara
- Section of Oral and Maxillofacial Oncology; Division of Maxillofacial Diagnostic and Surgical Sciences; Faculty of Dental Science; Kyushu University; Fukuoka Japan
| | - S Ieda
- Section of Oral and Maxillofacial Oncology; Division of Maxillofacial Diagnostic and Surgical Sciences; Faculty of Dental Science; Kyushu University; Fukuoka Japan
| | - S Furukawa
- Section of Oral and Maxillofacial Oncology; Division of Maxillofacial Diagnostic and Surgical Sciences; Faculty of Dental Science; Kyushu University; Fukuoka Japan
| | - M Ohta
- Section of Oral and Maxillofacial Oncology; Division of Maxillofacial Diagnostic and Surgical Sciences; Faculty of Dental Science; Kyushu University; Fukuoka Japan
| | - Y Imabayashi
- Section of Oral and Maxillofacial Oncology; Division of Maxillofacial Diagnostic and Surgical Sciences; Faculty of Dental Science; Kyushu University; Fukuoka Japan
| | - S Nakamura
- Section of Oral and Maxillofacial Oncology; Division of Maxillofacial Diagnostic and Surgical Sciences; Faculty of Dental Science; Kyushu University; Fukuoka Japan
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Yahata M, Sakamoto Y, Inoue S, Iwamura T, Fujita R, Koami H, Miike T, Imahase H, Narumi S, Goto A, Ohta M. More effective use of polymyxin-B hemoperfusion for nonoperation cases. Crit Care 2014. [PMCID: PMC4273848 DOI: 10.1186/cc14035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Yamamoto T, Shibata T, Ohta M, Yasumoto M, Nishida K, Hatayama A, Mattei S, Lettry J, Sawada K, Fantz U. Modeling of neutrals in the Linac4 H(-) ion source plasma: hydrogen atom production density profile and Hα intensity by collisional radiative model. Rev Sci Instrum 2014; 85:02B118. [PMID: 24593558 DOI: 10.1063/1.4833016] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
To control the H(0) atom production profile in the H(-) ion sources is one of the important issues for the efficient and uniform surface H(-) production. The purpose of this study is to construct a collisional radiative (CR) model to calculate the effective production rate of H(0) atoms from H2 molecules in the model geometry of the radio-frequency (RF) H(-) ion source for Linac4 accelerator. In order to validate the CR model by comparison with the experimental results from the optical emission spectroscopy, it is also necessary for the model to calculate Balmer photon emission rate in the source. As a basic test of the model, the time evolutions of H(0) production and the Balmer Hα photon emission rate are calculated for given electron energy distribution functions in the Linac4 RF H(-) ion source. Reasonable test results are obtained and basis for the detailed comparisons with experimental results have been established.
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Affiliation(s)
- T Yamamoto
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
| | - T Shibata
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
| | - M Ohta
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
| | - M Yasumoto
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
| | - K Nishida
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
| | - A Hatayama
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Yokohama 223-8522, Japan
| | - S Mattei
- CERN, 1211 Geneva 23, Switzerland
| | - J Lettry
- CERN, 1211 Geneva 23, Switzerland
| | - K Sawada
- Faculty of Engineering, Shinshu University, 4-17-1 Wakasato, Nagano 380-8553, Japan
| | - U Fantz
- Max-Plank-Instutut fuer Plasmaphysik, EURATOM Association, Boltzmannstr. 2, D-85748 Garching, Germany
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Ohta M, Mattei S, Yasumoto M, Hatayama A, Lettry J. Numerical study of the inductive plasma coupling to ramp up the plasma density for the Linac4 H(-) ion source. Rev Sci Instrum 2014; 85:02B113. [PMID: 24593553 DOI: 10.1063/1.4833920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
In the Linac4 H(-) ion source, the plasma is generated by an RF antenna operated at 2 MHz. In order to investigate the conditions necessary for ramping up the plasma density of the Linac4 H(-) ion source in the low plasma density, a numerical study has been performed for a wide range of parameter space of RF coil current and initial pressure from H2 gas injection. We have employed an Electromagnetic Particle in Cell model, in which the collision processes have been calculated by a Monte Carlo method. The results have shown that the range of initial gas pressure from 2 to 3 Pa is suitable for ramping up plasma density via inductive coupling.
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Affiliation(s)
- M Ohta
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - S Mattei
- CERN, 1211 Geneva 23, Switzerland
| | - M Yasumoto
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - A Hatayama
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - J Lettry
- CERN, 1211 Geneva 23, Switzerland
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Nishida K, Mochizuki S, Ohta M, Yasumoto M, Lettry J, Mattei S, Hatayama A. Equivalent circuit of radio frequency-plasma with the transformer model. Rev Sci Instrum 2014; 85:02B117. [PMID: 24593557 DOI: 10.1063/1.4832060] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
LINAC4 H(-) source is radio frequency (RF) driven type source. In the RF system, it is required to match the load impedance, which includes H(-) source, to that of final amplifier. We model RF plasma inside the H(-) source as circuit elements using transformer model so that characteristics of the load impedance become calculable. It has been shown that the modeling based on the transformer model works well to predict the resistance and inductance of the plasma.
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Affiliation(s)
- K Nishida
- Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - S Mochizuki
- Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - M Ohta
- Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - M Yasumoto
- Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - J Lettry
- CERN Rte de Meyrin, 1200 Geneva, Switzerland
| | - S Mattei
- CERN Rte de Meyrin, 1200 Geneva, Switzerland
| | - A Hatayama
- Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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Lettry J, Aguglia D, Andersson P, Bertolo S, Butterworth A, Coutron Y, Dallocchio A, Chaudet E, Gil-Flores J, Guida R, Hansen J, Hatayama A, Koszar I, Mahner E, Mastrostefano C, Mathot S, Mattei S, Midttun Ø, Moyret P, Nisbet D, Nishida K, O'Neil M, Ohta M, Paoluzzi M, Pasquino C, Pereira H, Rochez J, Sanchez Alvarez J, Sanchez Arias J, Scrivens R, Shibata T, Steyaert D, Thaus N, Yamamoto T. Status and operation of the Linac4 ion source prototypes. Rev Sci Instrum 2014; 85:02B122. [PMID: 24593562 DOI: 10.1063/1.4848975] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
CERN's Linac4 45 kV H(-) ion sources prototypes are installed at a dedicated ion source test stand and in the Linac4 tunnel. The operation of the pulsed hydrogen injection, RF sustained plasma, and pulsed high voltages are described. The first experimental results of two prototypes relying on 2 MHz RF-plasma heating are presented. The plasma is ignited via capacitive coupling, and sustained by inductive coupling. The light emitted from the plasma is collected by viewports pointing to the plasma chamber wall in the middle of the RF solenoid and to the plasma chamber axis. Preliminary measurements of optical emission spectroscopy and photometry of the plasma have been performed. The design of a cesiated ion source is presented. The volume source has produced a 45 keV H(-) beam of 16-22 mA which has successfully been used for the commissioning of the Low Energy Beam Transport (LEBT), Radio Frequency Quadrupole (RFQ) accelerator, and chopper of Linac4.
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Affiliation(s)
- J Lettry
- CERN, 1211 Geneva 23, Switzerland
| | | | | | | | | | | | | | | | | | - R Guida
- CERN, 1211 Geneva 23, Switzerland
| | - J Hansen
- CERN, 1211 Geneva 23, Switzerland
| | - A Hatayama
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - I Koszar
- CERN, 1211 Geneva 23, Switzerland
| | - E Mahner
- CERN, 1211 Geneva 23, Switzerland
| | | | - S Mathot
- CERN, 1211 Geneva 23, Switzerland
| | - S Mattei
- CERN, 1211 Geneva 23, Switzerland
| | | | - P Moyret
- CERN, 1211 Geneva 23, Switzerland
| | - D Nisbet
- CERN, 1211 Geneva 23, Switzerland
| | - K Nishida
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - M O'Neil
- CERN, 1211 Geneva 23, Switzerland
| | - M Ohta
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | | | | | | | - J Rochez
- CERN, 1211 Geneva 23, Switzerland
| | | | | | | | - T Shibata
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | | | - N Thaus
- CERN, 1211 Geneva 23, Switzerland
| | - T Yamamoto
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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Mattei S, Ohta M, Yasumoto M, Hatayama A, Lettry J, Grudiev A. Plasma ignition and steady state simulations of the Linac4 H(-) ion source. Rev Sci Instrum 2014; 85:02B115. [PMID: 24593555 DOI: 10.1063/1.4833919] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The RF heating of the plasma in the Linac4 H(-) ion source has been simulated using a particle-in-cell Monte Carlo collision method. This model is applied to investigate the plasma formation starting from an initial low electron density of 10(12) m(-3) and its stabilization at 10(18) m(-3). The plasma discharge at low electron density is driven by the capacitive coupling with the electric field generated by the antenna, and as the electron density increases the capacitive electric field is shielded by the plasma and induction drives the plasma heating process. Plasma properties such as e(-)/ion densities and energies, sheath formation, and shielding effect are presented and provide insight to the plasma properties of the hydrogen plasma.
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Affiliation(s)
- S Mattei
- CERN, 1211 Geneva 23, Switzerland
| | - M Ohta
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kouhoku-ku, Yokohama 223-8522, Japan
| | - M Yasumoto
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kouhoku-ku, Yokohama 223-8522, Japan
| | - A Hatayama
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kouhoku-ku, Yokohama 223-8522, Japan
| | - J Lettry
- CERN, 1211 Geneva 23, Switzerland
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Hatayama A, Shibata T, Nishioka S, Ohta M, Yasumoto M, Nishida K, Yamamoto T, Miyamoto K, Fukano A, Mizuno T. Kinetic modeling of particle dynamics in H(-) negative ion sources (invited). Rev Sci Instrum 2014; 85:02A510. [PMID: 24593433 DOI: 10.1063/1.4852300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Progress in the kinetic modeling of particle dynamics in H(-) negative ion source plasmas and their comparisons with experiments are reviewed, and discussed with some new results. Main focus is placed on the following two topics, which are important for the research and development of large negative ion sources and high power H(-) ion beams: (i) Effects of non-equilibrium features of EEDF (electron energy distribution function) on H(-) production, and (ii) extraction physics of H(-) ions and beam optics.
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Affiliation(s)
- A Hatayama
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - T Shibata
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - S Nishioka
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - M Ohta
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - M Yasumoto
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - K Nishida
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - T Yamamoto
- Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, 223-8522, Japan
| | - K Miyamoto
- Naruto University of Education, 748 Nakashima, Takashima, Naruto-cho, Naruto-shi, Tokushima 772-8502, Japan
| | - A Fukano
- Monozukuri Department, Tokyo Metropolitan College of Industrial Technology, Shinagawa, Tokyo 140-0011, Japan
| | - T Mizuno
- Department of Management Science, College of Engineering, Tamagawa University, Machida, Tokyo 194-8610, Japan
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Yasumoto M, Ohta M, Kawamura Y, Hatayama A. Analysis of rapid increase in the plasma density during the ramp-up phase in a radio frequency negative ion source by large-scale particle simulation. Rev Sci Instrum 2014; 85:02B126. [PMID: 24593566 DOI: 10.1063/1.4858136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Numerical simulations become useful for the developing RF-ICP (Radio Frequency Inductively Coupled Plasma) negative ion sources. We are developing and parallelizing a two-dimensional three velocity electromagnetic Particle-In-Cell code. The result shows rapid increase in the electron density during the density ramp-up phase. A radial electric field due to the space charge is produced with increase in the electron density and the electron transport in the radial direction is suppressed. As a result, electrons stay for a long period in the region where the inductive electric field is strong, and this leads efficient electron acceleration and a rapid increasing of the electron density.
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Affiliation(s)
- M Yasumoto
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - M Ohta
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - Y Kawamura
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
| | - A Hatayama
- Graduate School of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan
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Takai Y, Ohta M, Akagi R, Kato E, Wakahara T, Kawakami Y, Fukunaga T, Kanehisa H. Applicability of ultrasound muscle thickness measurements for predicting fat-free mass in elderly population. J Nutr Health Aging 2014; 18:579-85. [PMID: 24950147 DOI: 10.1007/s12603-013-0419-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
OBJECTIVE This study aimed to examine the applicability of ultrasound muscle thickness (MT) measurements for predicting whole body fat-free mass (FFM) in elderly individuals. DESIGN AND SETTING Cross-sectional study of 77 healthy elderly individuals. METHODS MTs at nine sites of the body and FFM were determined using B-mode ultrasound and dual-energy x-ray absorptiometry (DXA), respectively, in 44 women and 33 men aged 52 to 78 yrs. Stepwise multiple regression analysis produced two equations for predicting DXA-based FFM with sex (dummy: woman = 0 and man = 1) and either MTs at the anterior and posterior of thigh and lower leg (Eq1) or the product of MT and limb length (MT×LL) at thigh anterior and posterior, lower leg posterior, and upper arm anterior (Eq2) as independent variables. RESULTS The R2 and SEE for each of the two equations were 0.929 and 2.5 kg for Eq1 and 0.955 and 2.0 kg for Eq2. The estimated FFM from each of Eq1 (44.4 ± 8.9 kg) and Eq2 (44.4 ± 9.0 kg) did not significantly differ from that of the DXA-based FFM (44.4 ± 9.2 kg), without systematic error. However, the absolute value of the difference between the DXA-based and estimated FFM was significantly greater with Eq1 (2.0 ± 1.5 kg) than with Eq2 (1.5 ± 1.3 kg). CONCLUSION The current results indicate that ultrasound MT measurement is useful to predict FFM in the elderly, and its accuracy is improved by using the product of MT and limb length as an independent variable.
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Affiliation(s)
- Y Takai
- Yohei Takai, Assistant Professor, Ph. D. National Institute of Fitness and Sports in Kanoya, Japan, 1 Shiromizu, Kanoya, Kagoshima, Japan, 8912393, , Tel/Fax: +81-994464992
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Aghi M, Vogelbaum MA, Jolly DJ, Robbins JM, Ostertag D, Ibanez CE, Gruber HE, Kasahara N, Bankiewicz K, Cloughesy TF, Chang SM, Butowski N, Kesari S, Chen C, Mikkelsen T, Landolfi J, Chiocca EA, Elder JB, Foltz G, Pertschuk D, Anaizi A, Taylor C, Kosty J, Zimmer L, Theodosopoulos P, Anaizi A, Gantwerker E, Pensak M, Theodosopoulos P, Anaizi A, Grewal S, Theodosopoulos P, Zimmer L, Anaizi A, Pensak M, Theodosopoulos P, Arakawa Y, Kang Y, Murata D, Fujimoto KI, Miyamoto S, Blagia M, Paulis M, Orunesu G, Serra S, Akers J, Ramakrishnan V, Kim R, Skog J, Nakano I, Pingle S, Kalinina J, Kesari S, Breakfield X, Hochberg F, Van Meir E, Carter B, Chen C, Czech T, Nicholson J, Frappaz D, Kortmann RD, Alapetite C, Garre ML, Ricardi U, Saran F, Calaminus G, Hamer PDW, Hendriks E, Mandonnet E, Barkhof F, Zwinderman K, Duffau H, Esquenazi Y, Johnson J, Tandon N, Esquenazi Y, Friedman E, Lin Y, Zhu JJ, Tandon N, Fujimaki T, Kobayashi M, Wakiya K, Ohta M, Adachi J, Fukuoka K, Suzuki T, Yanagisawa T, Matsutani M, Mishima K, Sasaki J, Nishikawa R, Hoffermann M, Bruckmann L, Ali KM, Asslaber M, Payer F, von Campe G, Jungk C, Beigel B, Abb V, Herold-Mende C, Unterberg A, Kim JH, Cho YH, Kim CJ, Mardor Y, Nissim O, Grober Y, Guez D, Last D, Daniels D, Hoffmann C, Nass D, Talianski A, Spiegelmann R, Cohen Z, Zach L, Marupudi N, Mittal S, Michaud K, Cantin L, Cottin S, Dandurand C, Mohammadi A, Hawasli A, Rodriguez A, Schroeder J, Laxton A, Elson P, Tatter S, Barnett G, Leuthardt E, Moriuchi S, Dehara M, Fukunaga T, Hagiwara Y, Soda H, Imakita M, Nitta M, Maruyama T, Iseki H, Ikuta S, Tamura M, Chernov M, Okamoto S, Okada Y, Muragaki Y, Ohue S, Kohno S, Inoue A, Yamashita D, Kumon Y, Ohnishi T, Oppido P, Villani V, Vidiri A, Pace A, Pompili A, Carapella C, Orringer D, Lau D, Niknafs Y, Piquer J, Llacer JL, Rovira V, Riesgo P, Cremades A, Rotta R, Levine N, Prabhu S, Sawaya R, Weinberg J, Rao G, Tummala S, Tilley C, Rovin R, Kassam A, Schwartz C, Romagna A, Thon N, Tonn JC, Schwarz SB, Kreth FW, Sonoda Y, Shibahara I, Saito R, Kanamori M, Kumabe T, Tominaga T, Steele C, Lawrence J, Rovin R, Winn R, Rachinger W, Simon M, Dutzmann S, Feigl G, Kremenevskaya N, Thon N, Tonn JC, Whelan H, Kelly M, Jogel S, Kaufmann B, Foy A, Lew S, Quirk B, Yong RL, Wu T, Mihatov N, Shen MJ, Brown MA, Zaghloul KA, Park GE, Park JK. SURGICAL THERAPIES. Neuro Oncol 2013; 15:iii217-iii225. [PMCID: PMC3823906 DOI: 10.1093/neuonc/not191] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2024] Open
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Takai Y, Ohta M, Akagi R, Kato E, Wakahara T, Kawakami Y, Fukunaga T, Kanehisa H. Validity of ultrasound muscle thickness measurements for predicting leg skeletal muscle mass in healthy Japanese middle-aged and older individuals. J Physiol Anthropol 2013; 32:12. [PMID: 24067065 PMCID: PMC3817997 DOI: 10.1186/1880-6805-32-12] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Accepted: 09/14/2013] [Indexed: 12/25/2022] Open
Abstract
Background The skeletal muscle mass of the lower limb plays a role in its mobility during daily life. From the perspective of physical resources, leg muscle mass dominantly decreases after the end of the fifth decade. Therefore, an accurate estimate of the muscle mass is important for the middle-aged and older population. The present study aimed to clarify the validity of ultrasound muscle thickness (MT) measurements for predicting leg skeletal muscle mass (SM) in the healthy Japanese middle-aged and older population. Findings MTs at four sites of the lower limb and the bone-free lean tissue mass (LTM) of the right leg were determined using brightness-mode ultrasonography and dual-energy X-ray absorptiometry (DXA), respectively, in 44 women and 33 men, 52- to 78-years old. LTM was used as a representative variable of leg skeletal muscle mass. In the model-development group (30 women and 22 men), regression analysis produced an equation with R2 and standard error of the estimate (SEE) of 0.958 and 0.3 kg, respectively: LTM (kg) = 0.01464 × (MTSUM×L) (cm2) - 2.767, where MTSUM is the sum of the product of MTs at four sites, and L is length of segment where MT is determined. The estimated LTM (7.0 ± 1.7 kg) did not significantly differ from the measured LTM (7.0 ± 1.7 kg), without a significant systematic error on a Bland-Altman plot. The application of this equation for the cross-validation group (14 women and 11 men) did not yield a significant difference between the measured (7.2 ± 1.6 kg) or estimated (7.2 ± 1.6 kg) LTM and systematic error. Conclusion The developed prediction equation may be useful for estimating the lean tissue mass of the lower extremity for the healthy Japanese middle-aged and older population.
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Affiliation(s)
- Yohei Takai
- National Institute of Fitness and Sports in Kanoya, 1 Shiromizu, Kanoya, Kagoshima 891-2393, Japan.
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Jin W, Yamada K, Ikami M, Kaji N, Tokeshi M, Atsumi Y, Mizutani M, Murai A, Okamoto A, Namikawa T, Baba Y, Ohta M. P18 Application of IgY to ELISA, LFDs, and immunopillar chips for detecting staphylococcal enterotoxins in milk and dairy products. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70263-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Minami M, Kuriyama M, Oshima Y, Nishiyama H, Ikegami S, Kawashima M, Ohta M. P97 Antimicrobial susceptibility of viridans group streptococci in Japan during 2009 and 2012. Int J Antimicrob Agents 2013. [DOI: 10.1016/s0924-8579(13)70341-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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