Publications by authors named "Tsuchihashi Y"

Background: Previous reports highlighted the efficacy of hemofiltration utilizing isotonic sodium bicarbonate solution as replacement fluid for severe metabolic acidosis. This approach corrects metabolic acidosis by eliminating chloride and supplementing bicarbonate. Here, we present the results of an in vitro study aimed at determining the effect of Isotonic sodium bicarbonate-based Continuous HemoDiafiltration (IBB-CHDF).

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  • The COVID-19 pandemic significantly impacted RSV notification trends in Japan from 2018 to 2021, notably reducing reports in 2020.
  • In 2021, there was an unusual early peak in RSV cases, particularly among older children (ages 2 and above), with a rise in milder cases being treated in outpatient settings compared to hospitals.
  • Despite a rebound in RSV-related deaths in 2021, the overall numbers remained lower than those reported in 2018 and 2019, highlighting the need for ongoing monitoring of RSV trends.
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  • A study in Japan examined pediatric patients aged 0-19 who died from SARS-CoV-2 infection between January and September 2022, identifying 62 cases and analyzing detailed medical information from 53 of those patients.
  • Of the patients with internal causes of death, 15% were infants under 1 year old, 59% had no underlying health conditions, and 88% of those eligible for vaccination had not been vaccinated.
  • Key findings showed that 46% experienced out-of-hospital cardiac arrest, nonrespiratory symptoms were more prevalent than respiratory symptoms, and the primary suspected causes of death were central nervous system and cardiac abnormalities; the study emphasizes close monitoring of pediatric patients in the week following symptom onset
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Objective: Newly graduated nurses embarking on careers in radiation therapy nursing at Japan's National University Hospitals face a spectrum of challenges, many of which have received limited attention in existing literature. This study aimed to uncover the primary difficulties encountered by these nurses, with a specific focus on their implications for training and systematic education.

Methods: Employing a survey involving nurses from five prestigious medical institutions in Japan, we explored the real-time experiences and challenges within radiation therapy nursing.

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Infectious virus shedding from individuals infected with severe acute respiratory syndrome-coronavirus 2 (SARS-CoV-2) is used to estimate human-to-human transmission risk. Control of SARS-CoV-2 transmission requires identifying the immune correlates that protect infectious virus shedding. Mucosal immunity prevents infection by SARS-CoV-2, which replicates in the respiratory epithelium and spreads rapidly to other hosts.

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A foodborne outbreak related to milk cartons served in school lunches occurred in June 2021, which involved more than 1,800 cases from 25 schools. The major symptoms were abdominal pain, diarrhoea, vomiting, and fever. Although major foodborne toxins and pathogens were not detected, a specific strain, serotype OUT (OgGp9):H18, was predominantly isolated from milk samples related to the outbreak and most patients tested.

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Introduction: Controlling pulmonary complex (MAC) disease is difficult because there is no way to know the clinical stage accurately. There have been few attempts to use cell-mediated immunity for diagnosing the stage. The objective of this study was to characterize cytokine profiles of CD4+T and CD19+B cells that recognize various -associated antigens in different clinical stages of MAC.

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In this study, incorporation of one deuterium atom was achieved by H-D exchange of one of the two identical methylene protons in various dihalomethanes (halogen=Cl, Br, and I) through a rapid-mixing microflow reaction of lithium diisopropylamide as a strong base and deuterated methanol as a deuteration reagent. Generation of highly unstable carbenoid intermediate and suppression of its decomposition were successfully controlled under high flow-rate conditions. Monofunctionalization of diiodomethane afforded various building blocks composed of boryl, stannyl, and silyl groups.

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Pulmonary nocardiosis is a rare disease that is often difficult to cure because of its tendency to recur. Here, we report a case of refractory localized pulmonary nocardiosis caused by . A 60-year-old Japanese woman had recurring pulmonary nocardiosis four times previously and each time she was treated with antibiotics for a sufficient duration; nevertheless, the disease continued to recur, probably because of resistance to antibiotics.

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  • Monitoring SARS-CoV-2 variants like Alpha and Delta is crucial due to their impact on infectivity and immune evasion, leading to a study on their regional and temporal replacement of previous strains.
  • Researchers analyzed PCR test results from various labs and used a logistic growth model to estimate how quickly new variants took over existing strains.
  • The study found that Alpha replaced over 90% of earlier strains by May 2021, while Delta did so by August 2021, with significant transmission advantages of up to 71.9% in different regions of Japan.
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  • * Severe cases (32 patients) showed worse imaging scores, particularly with inferior lung involvement, while upper lung lesions were also noted among the severe group, indicating a possible correlation with disease severity.
  • * Chest X-ray and CT scores effectively predicted severe disease, with optimal cut-off values showing high sensitivity and specificity, and the presence of cardiomegaly was significantly linked to severe outcomes.
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Previous studies have not assessed the causal effect of the Olympic Games on the spread of pandemics. Using the synthetic control method and the national public city data in Japan recorded from February to September 2021, we estimated the causal effects of the Tokyo 2020 Olympic and Paralympic Games on the number of coronavirus disease 2019 (COVID-19) cases. The difference between the number of COVID-19 cases in Tokyo and a counterfactual "synthetic Tokyo" (created using synthetic control method) after the opening of the Tokyo 2020 Games (23 July 2021) widened gradually and then considerably over time.

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This case involved a 72-year-old woman. From the day after mitral annuloplasty, a fever over 37°C and ballismus-like involuntary movements of the right upper and lower limbs appeared. A few month later, involuntary movements spread throughout the body, and she developed impairment of consciousness and difficulty speaking and eating.

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  • The study investigates the all-cause excess mortality during the COVID-19 outbreak in Japan for the year 2020, focusing on differences by sex and age group.
  • Using data from January 2015 to December 2020, researchers applied statistical models to assess mortality rates, finding a total excess of -20,982 deaths, indicating a reduction in deaths relative to expected figures.
  • The findings suggest that, unexpectedly, overall mortality decreased during the pandemic, with specific age groups under 60 and 70-79 showing increased deaths, highlighting the need for further research into specific causes of mortality.
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Tocilizumab, a humanized anti-IL-6 receptor antibody, has been used to treat severely to critically ill patients with COVID-19. A living systematic review with meta-analysis of recent RCTs indicates that the combination therapy of corticosteroids and tocilizumab produce better outcomes, while previous observational studies suggest that tocilizumab monotherapy is beneficial for substantial numbers of patients. However, what patients could respond to tocilizumab monotherapy remained unknown.

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  • The study looks at CD4 cell counts in HIV patients in Japan, comparing data from 2003-2010 and 2011-2017 to understand trends in infection and patient characteristics.
  • Significant changes were found in CD4 counts, with more patients having lower counts (<200 cells/mm) and fewer with higher counts (≥500 cells/mm), indicating a shift in health status among patients.
  • Overall, the research indicates a decrease in the incidence rate of HIV in Osaka, communicating important insights into the evolving landscape of the HIV epidemic in Japan.
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Introduction: Coronavirus disease 2019 (COVID-19) has caused unprecedented global morbidity and mortality. Japan has faced three epidemic "waves" of COVID-19 from early 2020 through early 2021. Here we narratively review the three waves in Japan, describe the key epidemiologic features of COVID-19, and discuss lessons learned.

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  • In early 2020, Japan saw a rise in novel coronavirus infections, prompting a study to analyze the characteristics and risk factors for severe outcomes in confirmed cases during January to March 2020.
  • The study focused on 516 cases; the median age was 60, with common symptoms including fever (79%), cough (76%), and pneumonia (63%); and it found that age, male gender, and pre-existing health conditions linked to higher severity.
  • Key findings revealed that elderly males and those with underlying health issues were at a greater risk for ICU admission and invasive ventilation, and some asymptomatic elderly patients developed severe symptoms after hospitalization, stressing the need for close monitoring.
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Neonatal pertussis can potentially cause severe complications and even death. Mothers have been most frequently identified as the source of neonatal pertussis. Approximately a dozen countries have implemented pertussis vaccination programs for pregnant women to protect neonates; however, in Japan, this has not been implemented.

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Introduction: Increasing evidence suggests the utility of the submandibular approach for ultrasonography to detect tongue fasciculation in amyotrophic lateral sclerosis (ALS). We hypothesized that transoral motion-mode ultrasonography (TOMU) would be useful to detect tongue fasciculation in patients with ALS.

Methods: Patients with sporadic ALS showing clinically definite tongue fasciculation were enrolled, and the ultrasonography findings of patients' tongues on TOMU and ultrasonography by the conventional submandibular approach were analyzed.

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