2.Nontuberculous Mycobacterial Peritonitis in a Patient Undergoing Continuous Ambulatory Peritoneal Dialysis
Yoshitaka Maeda ; Tomomi Uno ; Akiko Yoshida ; Akiko Takahashi ; Naoto Inaba ; Tatsuo Shiigai
Journal of Rural Medicine 2008;4(2):75-79
Non-tubercuous mycobacterial (NTM) infection in peritoneal dialysis (PD) patients has been rarely reported. We report a case of a 55-year-old female on continuous ambulatory peritoneal dialysis (CAPD). After a 2-year-history of recurrent exit-site infection of a PD catheter caused by Mycobacterium abscessus (M. abscessus), the patient was admitted to the hospital with signs of peritonitis. Since the same species, M. abscessus, was isolated from the CAPD effluent, multiple antibiotics were administered. However, the treatments could not relieve the symptoms of her infection. Consequently, the PD catheter was removed. Her condition gradually recovered over the course of subsequent, long-term, empirical antimicrobial therapies. NTMs, especially a rapidly growing NTM infection, have rarely been reported in PD patients and are commonly resistant to a variety of antimicrobial agents. Routine acid-fast staining is most likely helpful in promptly initiating treatment against NTM infection in PD patients. Moreover, an appropriate treatment regimen for a rapidly growing NTM infection should be established by accumulating data from cases as reported here.
Infection as complication of medical care
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PUPILLARY DISTANCE
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Peritoneal Dialysis, Continuous Ambulatory
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Peritonitis
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Patients
3.Prevalence of left ventricular dyssynchrony in patients with heart failure assessed by a novel programmer-cardioGRAF
Canzhan ZHU ; Naoto TAKAHASHI ; Akira YAMAMOTO ; Masahira ISHIKAWA ; Naomi KAWAGUCHI ; Takahiro UCHIDA ; Kazuo MUNAKATA
Journal of Geriatric Cardiology 2009;6(3):151-156
Objectives Left ventricular systolic dyssynchrony is the most important determinant of response to cardiac resynchronization therapy (CRT), playing a vital role to predict improvement of systolic function or LV reverse remodeling. CardioGRAF is a novel programmer based on the ECG gated single photon emission computed tomography (G-SPECT) imaging to detect LV systolic and diastolic dyssynchrony simultaneously. This study was to investigate the prevalence of systolic and diastolic left ventricular (LV) dyssynchrony in patients with heart failure. Methods We retrospectively studied 69 patients with heart disease, including 31 patients who had symptoms of heart failure (NYHA class Ⅱ-Ⅲ), and 38 patients who had no symptoms of heart failure (NYHA class Ⅰ). G-SPECT data were analyzed by cardiaGRAF, and measurements included the time to end systole (TES), the time to peak ejection (TPE), the time to peak filling (TPF), TES+TPF and maximal difference (MD) of each parameters were obtained, using the 95th percentile of the control group as a cutoffof 150 ms for MD-TES, 139 ms for MD-TPE, 345 ms for MD-TPF and 315 ms for MD-TES+TPF. Results The prevalence of LV systolic dyssynchrony was significantly higher in heart failure patients with reduced LV ejection fraction (LVEF)<45% (72% for MD-TES; 64% for MD-TPE) compared with heart failure patients with preserved LVEF=45% (14% for both MD-TES and MD-TPE; P=0.002, P=0.005, respectively); The prevalence of MD-TES<150 ms was higher in NYHA class Ⅲ patients (64%) compared with NYHA class Ⅱ patients (27%, P=0.049). However, the prevalence of the LV diastolic dyssynchrony were high but not difference between NYHA class Ⅲ(47% for both MD-TPF and MD-TES+TPF) and class Ⅲ(63% for MD-TPF; 69% for MD-TES+TPF; P=NS) patients as well as between patients with preserved LVEF (43% for both MD-TPF and MD-TES+TPF) and patients with reduced LVEF(64% for MD-TPF; 72% for MD-TES+TPF; P=NS). Conclusions The prevalence of LV systolic dyssynchrony was high in heart failure patients with reduced LVEF. Diastolic dyssynchrony was common in patients with heart failure. CardioGRAF maybe a useful method to detect LV dyssynchrony.
4.Acute encephalopathy with callosal, subcortical and thalamic lesions
uko Nakano ; Yukifumi Monden ; Masashi Mizuguchi ; Masako Nagashima ; Yasunori Koike ; Yuji Gunji ; Naoto Takahashi ; Hideo Sugie ; MarikoY. Momoi ; Takanori Yamagata
Neurology Asia 2015;20(1):85-89
Acute encephalopathy is classified into multiple syndromes, such as acute encephalopathy with biphasic
seizures and late reduced diffusion (AESD), clinically mild encephalitis/encephalopathy with a reversible
splenial lesion (MERS) and acute necrotizing encephalopathy (ANE), characterized radiologically
by lesions in the cerebral subcortical white matter, splenium of the corpus callosum and bilateral
thalami, respectively. We described a previously healthy 8-year-old boy who had febrile and biphasic
seizures, and encephalopathy. MRI showed abnormal signal intensity in the corpus callosum on day
2 and cerebral subcortical white matter and bilateral thalamic lesions on day 8. This is the first case
of acute encephalopathy in which callosal, subcortical and thalamic lesions co-existed. The clinical
course of this case was typical for AESD, atypical for MERS, and different from that of ANE.
Brain Diseases
5.Presynaptic Mechanism Underlying Regulation of Transmitter Release by G Protein Coupled Receptors.
Tomoyuki TAKAHASHI ; Yoshinao KAJIKAWA ; Masahiro KIMURA ; Naoto SAITOH ; Tetsuhiro TSUJIMOTO
The Korean Journal of Physiology and Pharmacology 2004;8(2):69-76
A variety of G protein coupled receptors (GPCRs) are expressed in the presynaptic terminals of central and peripheral synapses and play regulatory roles in transmitter release. The patch-clamp whole-cell recording technique, applied to the calyx of Held presynaptic terminal in brainstem slices of rodents, has made it possible to directly examine intracellular mechanisms underlying the GPCR-mediated presynaptic inhibition. At the calyx of Held, bath-application of agonists for GPCRs such as GABAB receptors, group III metabotropic glutamate receptors (mGluRs), adenosine A1 receptors, or adrenaline alpha2 receptors, attenuate evoked transmitter release via inhibiting voltage-activated Ca2+ currents without affecting voltage-activated K+ currents or inwardly rectifying K+ currents. Furthermore, inhibition of voltage-activated Ca2+ currents fully explains the magnitude of GPCR-mediated presynaptic inhibition, indicating no essential involvement of exocytotic mechanisms in the downstream of Ca2+ influx. Direct loadings of G protein beta gamma subunit (G beta gamma) into the calyceal terminal mimic and occlude the inhibitory effect of a GPCR agonist on presynaptic Ca2+ currents (IpCa), suggesting that G beta gammamediates presynaptic inhibition by GPCRs. Among presynaptic GPCRs glutamate and adenosine autoreceptors play regulatory roles in transmitter release during early postnatal period when the release probability (p) is high, but these functions are lost concomitantly with a decrease in p during postnatal development.
Adenosine
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Autoreceptors
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Brain Stem
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Epinephrine
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Glutamic Acid
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GTP-Binding Proteins*
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Patch-Clamp Techniques
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Presynaptic Terminals
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Receptor, Adenosine A1
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Receptors, G-Protein-Coupled*
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Receptors, Metabotropic Glutamate
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Rodentia
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Synapses
6.Effects of Geometrical Uncertainties on Whole Breast Radiotherapy: A Comparison of Four Different Techniques.
Naoki NAKAMURA ; Osamu TAKAHASHI ; Minobu KAMO ; Shogo HATANAKA ; Haruna ENDO ; Norifumi MIZUNO ; Naoto SHIKAMA ; Mami OGITA ; Kenji SEKIGUCHI
Journal of Breast Cancer 2014;17(2):157-160
PURPOSE: The purpose of this study was to quantify the target coverage, homogeneity, and robustness of the dose distributions against geometrical uncertainties associated with four whole breast radiotherapy techniques. METHODS: The study was based on the planning-computed tomography-datasets of 20 patients who underwent whole breast radiotherapy. A total of four treatment plans (wedge, field-in-field [FIF], hybrid intensity-modulated radiotherapy [IMRT], and full IMRT) were created for each patient. The hybrid IMRT plans comprised two opposed tangential open beams plus two IMRT beams. Setup errors were simulated by moving the beam isocenters by 5 mm in the anterior or posterior direction. RESULTS: With the original plan, the wedge technique yielded a high volume receiving > or =107% of the prescription dose (V107; 7.5%+/-4.2%), whereas the other three techniques yielded excellent target coverage and homogeneity. A 5 mm anterior displacement caused a large and significant increase in the V107 (+5.2%+/-4.1%, p<0.01) with the FIF plan, but not with the hybrid IMRT (+0.4%+/-1.2%, p=0.11) or full IMRT (+0.7%+/-1.8%, p=0.10) plan. A 5-mm posterior displacement caused a large decrease in the V95 with the hybrid IMRT (-2.5%+/-3.7%, p<0.01) and full IMRT (-4.3%+/-5.1%, p<0.01) plans, but not with the FIF plan (+0.1%+/-0.7%, p=0.74). The decrease in V95 was significantly smaller with the hybrid IMRT plan than with the full IMRT plan (p<0.01). CONCLUSION: The FIF, hybrid IMRT, and full IMRT plans offered excellent target coverage and homogeneity. Hybrid IMRT provided better robustness against geometrical uncertainties than full IMRT, whereas FIF provided comparable robustness to that of hybrid IMRT.
Breast Neoplasms
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Breast*
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Humans
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Prescriptions
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Radiotherapy*
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Radiotherapy, Intensity-Modulated
7.En Bloc Spondylectomy for Spinal Metastases: Detailed Oncological Outcomes at a Minimum of 2 Years after Surgery
Masayuki OHASHI ; Toru HIRANO ; Kei WATANABE ; Kazuhiro HASEGAWA ; Takui ITO ; Keiichi KATSUMI ; Hirokazu SHOJI ; Tatsuki MIZOUCHI ; Ikuko TAKAHASHI ; Takao HOMMA ; Naoto ENDO
Asian Spine Journal 2019;13(2):296-304
STUDY DESIGN: Retrospective case series. PURPOSE: To investigate the oncological outcomes, including distant relapse, after en bloc spondylectomy (EBS) for spinal metastases in patients with a minimum of 2-year follow-up. OVERVIEW OF LITERATURE: Although EBS has been reported to be locally curative and extend survival in select patients with spinal metastases, detailed reports regarding the control of distant relapse after EBS are lacking. METHODS: We conducted a retrospective review of 18 consecutive patients (median age at EBS, 62 years; range, 40–77 years) who underwent EBS for spinal metastases between 1991 and 2015. The primary cancer sites included the kidney (n=7), thyroid (n=4), liver (n=3), and other locations (n=4). Survival rates were estimated using the Kaplan–Meier method, and groups were compared using the log-rank method. RESULTS: The median operative time and intraoperative blood loss were 767.5 minutes and 2,375 g, respectively. Twelve patients (66.7%) experienced perioperative complications. Five patients (27.8%) experienced local recurrence of the tumor at a median of 12.5 months after EBS, four of which had a positive resection margin status. Thirteen patients (72.2%) experienced distant relapse at a median of 21 months after EBS. The estimated median survival period after distant relapse was 20 months (95% confidence interval, 0.71–39.29 months). No association was found between resection margin status and distant relapse. Overall, the 2-year, 5-year, and 10-year survival rates after EBS were 72.2%, 48.8%, and 27.1%, respectively. Importantly, the era in which EBS was performed did not impact the oncological outcomes. CONCLUSIONS: Our results suggest that EBS by itself, even if margin-free, cannot prevent further dissemination, which occurred in >70% of patients at a median of 21 months after EBS. These results should be considered and conveyed to patients for clinical decision-making.
Clinical Decision-Making
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Follow-Up Studies
;
Humans
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Kidney
;
Liver
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Methods
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Neoplasm Metastasis
;
Operative Time
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Recurrence
;
Retrospective Studies
;
Spine
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Survival Rate
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Thyroid Gland
8.Successful remission of ulcerative colitis flare-up during pregnancy with adsorptive granulomonocytapheresis plus tacrolimus.
Tomoyoshi SHIBUYA ; Keiichi HAGA ; Masato KAMEI ; Koki OKAHARA ; Shoko ITO ; Masahito TAKAHASHI ; Osamu NOMURA ; Takashi MURAKAMI ; Masae MAKINO ; Tomohiro KODANI ; Dai ISHIKAWA ; Naoto SAKAMOTO ; Taro OSADA ; Tatsuo OGIHARA ; Sumio WATANABE ; Akihito NAGAHARA
Intestinal Research 2018;16(3):484-488
Ulcerative colitis (UC) is 1 of the 2 major phenotypes of chronic inflammatory bowel disease (IBD), which afflicts millions of individuals throughout the world with debilitating symptoms that impair function and quality of life. Further, IBD often affects women during childbearing age. Indeed, UC activity frequently increases during pregnancy, and the medications used to induce remission may adversely affect the health of the mother and the unborn child. We report successful induction of a remission in a UC case who experienced a flare-up in the first trimester of pregnancy. Upon relapse, she was treated with steroids and adsorptive granulomonocytapheresis (GMA) with the Adacolumn plus tacrolimus. This combination therapy induced a stable remission that was maintained during her entire pregnancy. She gave birth to a healthy child at 36 weeks of pregnancy with no maternal or fetal complications. Our experience indicates that GMA, as a non-drug therapeutic intervention with a favorable safety profile, plus tacrolimus might be a relevant treatment option for patients with active IBD during pregnancy. A future study of a large cohort of pregnant patients should strengthen our findings.
Child
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Cohort Studies
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Colitis, Ulcerative*
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Female
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Humans
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Inflammatory Bowel Diseases
;
Mothers
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Parturition
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Phenotype
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Pregnancy Trimester, First
;
Pregnancy*
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Quality of Life
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Recurrence
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Steroids
;
Tacrolimus*
;
Ulcer*
9.Multi-step Gait Exercise Assist Robot for a Patient with Multiple Sclerosis
Naoto SHIMIZU ; Kota TAKAHASHI ; Motoki OKUDA ; Keiko MIYAMOTO ; Shuichi KUBO ; Suzuyo OHASHI ; Masaki KONDO ; Yasuo MIKAMI
The Japanese Journal of Rehabilitation Medicine 2023;60(8):732-729
Welwalk WW-1000® (WW-1000®) is a gait exercise-assisted robot. Suitable assistance was provided to the patients with hemiplegic legs in both stance and swing phases. In addition,this robot offers various forms of feedback to patients during exercise. We present the case of a patient with multiple sclerosis and left hemiplegia who underwent WW-1000® gait exercise.The 73-year-old patient required maximum assistance with metal ankle foot orthotics (AFO) and a quadruped cane prior to robot-based rehabilitation. The aims of gait exercise with the WW-1000® were as follows;① maintain the verticality of the trunk during the entire gait cycle;②shifting the center of gravity during stance phase on the nonparalytic limb;③stabilizing the swing phase on the paralytic limb, and enhancing support during the stance phase on the paralytic limb. Each aim was modified depending on level of achievement. Assistance with the WW-1000® activated the trunk and Nonparalytic limb (visual feedback was utilized in exercises). On day 9, the patient could walk using a plastic AFO and T-cane supervised by a therapist.The multifunctional WW-1000® is useful for subdividing gait goals, exercise and set stepwise aims consistent with the patient's abilities. Gait exercises using the WW-1000® may efficiently improve gait and helps adapt to changes in conditions in the subacute phase.