Publications by authors named "Takuya Kawahara"

Article Synopsis
  • The study aimed to assess postural stability in patients with vestibular migraine (VM) and probable vestibular migraine (PVM) without acute symptoms by analyzing their performance on foam posturography tests.
  • A total of 30 VM patients, 25 PVM patients, and 194 healthy controls were evaluated, with factors such as age, sex, and diagnosis being analyzed for their impact on postural stability.
  • Results indicated that both VM and PVM patients exhibited greater postural instability compared to healthy controls; however, there were no significant stability differences between the two patient groups.
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  • Anti-mitochondrial antibody (AMA)-positive myositis is a chronic muscle disease linked to serious cardiac issues and breathing difficulties, with a prevalence of 0.3 cases per 100,000 people in Japan.
  • The study analyzed data from 380 patients over ten years, revealing high rates of cardiac complications (53%) and respiratory impairment (33%), alongside significant risks such as recurrence (29%) and need for mechanical support (respirators in 22% and cardiac devices in 32%).
  • Key risk factors for worse outcomes included abnormal echocardiograms, respiratory issues, and muscle biopsy results, highlighting the need for proactive management strategies to address potential severe complications.
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  • The study explores how respiratory sarcopenia, or reduced respiratory muscle strength, can help improve risk assessment for patients undergoing surgery for non-small cell lung cancer (NSCLC).
  • Researchers analyzed data from 806 patients in Tokyo who had surgical treatment for NSCLC between 2009 and 2018, focusing on outcomes based on their levels of respiratory strength and muscle mass.
  • Findings indicate that respiratory strength is a better predictor of patient outcomes than the traditional metric of muscle radiodensity, suggesting that factoring in respiratory sarcopenia could enhance postoperative care strategies.
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  • * It was discovered that 73.7% of participants had minimal pleural fluid, with right-sided fluid being more common, and little change in fluid thickness was observed after a year.
  • * Factors like age, sex, smoking, body mass index, and blood pressure were linked to the presence of pleural fluid, which is typically considered physiological and shows variability based on individual characteristics.
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  • A systematic review investigated the effectiveness of home-based exercise programs on reducing anxiety and depression in children and adolescents aged 5 to 18.
  • After screening 2,527 studies, nine met the criteria for quality assessment, focusing on online exercise interventions.
  • The results indicated a notable reduction in anxiety levels, while evidence for decreased low mood was less convincing, suggesting that interactive video sessions show promise for promoting mental health in youth.
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Background: Age-related changes in left ventricular (LV) structure and function lower the threshold for the onset of heart failure with preserved ejection fraction (HFpEF). LV parameters change also with race; however, the racial differences in age-related changes in LV parameters with and without adjustment for body mass index (BMI), heart rate (HR), and blood pressure (BP) remain unclear.

Methods And Results: We performed a subanalysis of the World Alliance Society of Echocardiography Normal Values Study, an international cross-sectional study that examined normal echocardiographic values in 15 countries.

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Objective: A Mediterranean dietary pattern, sleeping habits, physical activity, and lifestyle appear to affect reproductive health. There are few reports about whether fertility-specific quality of life (QOL) is linked to infertility treatment outcomes. The aim of this study is to investigate when lifestyle factors and fertility-specific QOL are comprehensively considered, which factors influence assisted reproductive technology (ART) outcomes.

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Background: Clinical data management (CDM) collects, integrates, and makes data available. It plays a vital role in clinical research. However, there are few opportunities for Japanese clinical data managers to learn about its systematic framework, particularly in academic research organizations.

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Article Synopsis
  • PPPD (Persistent postural-perceptual dizziness) patients experience worsened symptoms when standing, moving, or exposed to visual stimuli.
  • A study evaluated postural stability in 53 PPPD patients using foam posturography, comparing results with healthy controls.
  • Findings indicated that PPPD patients relied more on visual cues and less on somatosensory input when standing, regardless of their vestibular function, highlighting unique balance control dynamics.
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We investigated the tumor immune response in gastric cancer patients receiving third-line nivolumab monotherapy to identify immune-related biomarkers for better patient selection. Nineteen patients (10 males, median age 67 years) who received nivolumab as a third- or later-line therapy were enrolled. We analyzed the tumor immune response in durable clinical benefit (DCB) and non-DCB patients.

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  • Despite the proven benefits of cardiac rehabilitation (CR) for heart patients, many struggle to participate due to factors like busy schedules, costs, and the challenges of accessing in-person care.
  • To address these issues, remote CR is gaining traction, utilizing wearable devices and apps for telemonitoring, allowing patients to receive care from home.
  • While remote CR has shown promise in improving exercise tolerance, its long-term effects on reducing cardiac events and mortality are still debated, highlighting the need for careful patient assessments and quality assurance in remote care services.
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Introduction: Patients undergoing hemodialysis exhibit a high incidence of subclavian steal syndrome. Many cases of endovascular treatment for subclavian artery stenosis were only reported recently; however, the long-term results of surgical treatment are also important. Herein, we report a case of subclavian steal syndrome treated with common carotid-axillary bypass surgery in a patient undergoing hemodialysis.

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Background: The reproducibility of the effective intensity of noisy galvanic vestibular stimulation (nGVS) to improve postural stability is not well known.

Objective: We aimed to investigate inter-day and intra-day variations in effective intensity in patients with bilateral vestibulopathy (BVP).

Methods: Thirteen BVP patients were measured for center-of-pressure movements in the standing posture at five time points: morning of the first test day, morning and evening of the second test day, and morning and evening of the third test day.

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Objective: To assess the annual incidence of vestibular neuritis (VN) in the Japanese population.

Methods: We conducted a mail-based survey targeting otolaryngologic clinics and hospitals across Japan to estimate the annual number of patients who were newly-diagnosed with VN during the one-year period of 2021. Using a stratified sampling method, we selected 1,107 departments and asked them to report the number of new patients with VN and their demographics.

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Objective: To investigate the effects of self-management vestibular rehabilitation (VR) on the subjective symptoms of dizziness and postural stability in persistent postural-perceptual dizziness (PPPD).

Study Design: Retrospective case review.

Methods: The medical records of 30 patients newly diagnosed with PPPD based on the Bárány Society's diagnostic criteria were reviewed.

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Purpose: Surgical procedures are often evaluated subjectively, and an objective evaluation has been considered difficult to make and rarely reported, especially in open surgery, where the range of motion is wide. This study evaluated the effectiveness of surgical suturing training as an educational tool using the Leap Motion Controller (LMC), which can capture hand movements and reproduce them as data comprising parametric elements.

Methods: We developed an off-the-job training system (Off-JT) in our department, mainly using prosthetic grafts and various anastomotic methodologies with graded difficulty levels.

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Background: Functionally impaired variants of , encoding an enzyme in biosynthesis of coenzyme Q10 (CoQ10), were found in familial multiple system atrophy (MSA) and V393A in is associated with sporadic MSA. Furthermore, reduced levels of CoQ10 have been demonstrated in MSA patients.

Methods: This study was a multicentre, randomised, double-blinded, placebo-controlled phase 2 trial.

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Persistent postural-perceptual dizziness (PPPD) is induced by preceding conditions that cause balance disorders. To investigate the association between vestibular function and preceding balance disorders in PPPD patients, a retrospective chart review was performed. Vestibular function in 55 PPPD patients was measured using the caloric test, cervical vestibular evoked myogenic potential testing to air-conducted sound (ACS cVEMP), ocular vestibular evoked myogenic potential testing to bone-conducted vibration (BCV oVEMP), and video head impulse testing (vHIT).

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Benefit-risk balance is gaining interest in clinical trials. For the comprehensive assessment of benefits and risks, generalized pairwise comparisons are increasingly used to estimate the net benefit based on multiple prioritized outcomes. Although previous research has demonstrated that the correlations between the outcomes impact the net benefit and its estimate, the direction and magnitude of this impact remain unclear.

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Background: Facial information acquired via three-dimensional reconstruction of head computed tomography (CT) data may be considered personal information, which can be problematic for neuroimaging studies. However, no study has verified the relationship between slice thickness and face reproducibility. This study determined the relationship and match rate between image slice thickness and face detection accuracy of face-recognition software in facial reconstructed models.

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Article Synopsis
  • Fractional flow reserve (FFR) is a standard method for assessing heart issues, but its use is limited due to time, cost, and discomfort associated with the procedure.
  • A new method called saline-induced Pd/Pa ratio (SPR) may offer a simpler alternative to FFR, yet its clinical significance is still uncertain.
  • The study found that SPR had a stronger correlation with FFR compared to resting full-cycle ratio (RFR) and showed superior diagnostic accuracy, suggesting SPR could effectively evaluate coronary artery stenosis.
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Background: In clinical studies, the EQ-5D-5L is often employed with disease-specific health-related quality of life instruments. The questions in the former are more general than the latter; however, it is known that responses to general questions can be influenced by preceding specific questions. Thus, the responses to the EQ-5D-5L have the possibility of being influenced by the preceding disease-specific health-related quality of life instruments.

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