Publications by authors named "Jun Yamakawa"

Background: The management of ulnar collateral ligament (UCL) injuries widely varies among surgeons. Although various treatment options have been proposed including surgical and conservative treatments, no golden standard treatment strategy has been established of yet. The American survey reported an overall experienced and well-trained cohort of surgeons often reached consensus opinions on how to approach UCL injury.

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To assess the predictive reliability of the Simplified Fournier's Gangrene Severity Index Score (SFGSI) for mortality in Japanese patients with Fournier's gangrene (FG), we compared the clinical features and outcomes of a patient sample with the SFGSI. The medical records of 36 patients diagnosed with FG at our hospital between October 2007 and September 2022 were reviewed retrospectively. Clinical and laboratory variables, including SFGSI, were evaluated and predictive factors for fatality were investigated using multivariate logistic regression analysis.

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Article Synopsis
  • * An 86-year-old woman experienced severe symptoms due to this condition, which was diagnosed through imaging that showed her left ureter trapped in the sciatic foramen.
  • * Treatment involved stabilizing her condition with fluids and antibiotics, followed by a procedure to relieve ureteral blockage and place a stent, which improved her health status.
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Background: Although surgical shoulder stabilization by coracoid transfer is effective for collision athletes and has a low reinjury rate, no reports have described the midterm results of this procedure in specific patient cohorts of sufficient number or provided subjective assessments of these patients.

Purpose: To evaluate midterm results after treatment of shoulder instability with the Bristow procedure in a large cohort of rugby players.

Study Design: Case series; Level of evidence, 4.

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Aims And Background: Prophylactic use of antibiotics against the pathogens likely to contaminate the procedure is considered beneficial to prevent surgical site infections. We asked that an increase in the effective blood concentration by increasing the administration dose immediately before the operation can decrease the incidence of surgical site infection and performed a prospective study in patients undergoing total hip arthroplasty.

Methods: The subjects consisted of 357 patients who underwent initial THA between January 2006 and June 2012.

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Article Synopsis
  • The study focused on 26 patients with traumatic thoracic aortic rupture (TTAR) to examine how different factors influenced their survival outcomes.
  • The main findings indicated that a younger age was linked to better survival rates, while the severity of multiple injuries, represented by the Injury Severity Score (ISS), was higher in those who died.
  • Emergency operations had mixed results, with immediate surgeries resulting in some deaths, whereas all patients who had delayed surgeries survived, highlighting the complexity of treating TTAR.
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Objective: We investigated our 12-year experience of traumatic diaphragmatic injury (TDI) in our emergency medical center. This study aimed to clarify clinical features of TDI and identify factors affecting mortality and morbidity in TDI treatment.

Methods: We analyzed clinical characteristics, Injury Severity Score (ISS), probability of survival (Ps), and mortality of patients treated for TDI at the Tertiary Emergency Medical Center of Tokyo Metropolitan Bokutoh Hospital between January 1999 and December 2010.

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Background: Scapular dyskinesis represents a considerable risk of shoulder injury to overhead athletes; however, there is a shortage of detailed epidemiologic information about scapular dyskinesis among the participants in collision sports.

Purpose: To describe the incidence and relationship of scapular dyskinesis to shoulder discomfort and variables related to the shoulder in top rugby players.

Methods: One hundred twenty top rugby football players in Japan were evaluated by means of questionnaires, physical examinations, and a video analysis during their preseason.

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Vancomycin-intermediate Staphylococcus aureus (VISA) and its precursor, heterogeneous VISA (hVISA), are increasingly the cause of vancomycin treatment failure. Prolonged glycopeptide treatment causes the emergence of these pathogens. However, we recently reported that hVISA can be generated by methicillin-resistant S.

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One of the most important objectives in materials, chemical, and physical sciences is the creation of large conjugated macrocycles with well-defined shapes, since such molecules are not only theoretically and experimentally interesting but also have potential applications in nanotechnology. Fully unsaturated macrocycles are regarded as models for infinitely conjugated π systems with inner cavities, and exhibit unusual optical and magnetic behavior. Macrocycles have interior and exterior sites, and site-specific substitution at both or either site can afford attractive structures, such as 1D, 2D, and 3D supramolecular nanostructures.

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Nonaphenylenes and dodecaphenylenes have been synthesized by using electron-transfer oxidation of Lipshutz cuprates with duroquinone. Oxidation of the Lipshutz cuprate derived from 4,4''-dibromo-o-terphenyl 3a in THF produced nonaphenylene 1a in 46% yield, whereas the similar oxidation of the Lipshutz cuprates derived from 4,4''-diiodo-4',5'-dialkyl-o-terphenyls 3b-d in ether afforded the corresponding nonaphenylenes 1b-d and dodecaphenylenes 2b-d in moderate total yields. In the case of 4,4''-diiodo-4',5'-didodecyloxy-o-terphenyl 3e as the starting material, oxidation of the corresponding Lipshutz cuprate in ether or THF only led to the formation of nonaphenylene 1e.

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This study was to assess the effect of a fixed dietary intake on biomarkers of red blood cell (RBC) biosynthesis and degradation. Over a two-year period, eight collegiate rhythmic gymnasts participated in this study. During the first year, they ate self-selected diets.

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A 47-year-old man was diagnosed with primary aldosteronism due to two left adrenal adenomas, suggested on computed tomography (CT) to be located at the upper and lower adrenal portion. However, adosterol scintigraphy revealed negligible uptake at the upper portion of the left adrenal. Laparoscopic left adrenalectomy was performed, but macroscopic examination of the specimen revealed only one adrenal tumor.

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The purpose of our study was to examine the effects of a single exercise bout on the natural killer (NK) cell count and activity in physically active elderly people, sedentary elderly people, and sedentary young people. Eight elderly women who trained by walking (age, 64 +/- 1 years; Vo(2peak), 32.2 +/- 1.

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The purpose of this study was to test the hypothesis that regular exercise training in elderly people affects the type 1/type 2 balance. Nine elderly women who train by walking (mean+/-S.E.

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