Publications by authors named "OE K"

Postoperative disorders of consciousness can arise from various factors, making diagnosis challenging. This report presents a case of a disorder of consciousness that occurred after awakening from general anesthesia, in which various examinations including computed tomography (CT) and magnetic resonance imaging (MRI) were conducted, but the cause could not be identified. A man in his 60s with a history of hypertension and cerebral hemorrhage underwent revision total hip arthroplasty under general anesthesia for a left periprosthetic hip fracture.

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Introduction: There is a worldwide trend toward 'revisiting' cemented total hip arthroplasty (THA). In Japan, however, cemented THAs accounts for 11%, and the percentage of cemented hemiarthroplasty is estimated to be less than 10%. This review was designed to reconsider the option of cemented THA and to encourage policy changes in Japan to support the best possible care for patients.

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Remimazolam, a short-acting benzodiazepine approved for use in general anesthesia in Japan in 2020, has cardiovascular stability superior to conventional anesthetics. Anesthesia management using remimazolam of a patient with impaired cardiac function and several complications is reported. A man in his 50s with hypertension, diabetes mellitus, and chronic kidney disease (G 5) on dialysis came to our hospital with a chief complaint of exertional dyspnea and chest tightness, and a close examination showed stenoses of three coronary arteries.

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  • Suboptimal outcomes in unstable pertrochanteric fractures may be influenced by muscular factors, particularly weakness in the gluteal muscles, rather than just bone integrity.
  • The study aimed to investigate the correlation between gluteal muscle size and density in patients with stable versus unstable fractures, hypothesizing that weaker muscles would lead to more unstable fractures.
  • A retrospective analysis of 111 geriatric patients with pertrochanteric fractures was conducted, assessing demographic data and muscle metrics, using multivariate logistic regression to identify predictors of fracture stability.
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Thoracic outlet syndrome (TOS) is characterized by intractable cervicobrachial pain caused by strangulation of the brachial plexus and subclavian artery by structures of the superior thoracic outlet. We describe percutaneous epidural adhesiolysis for refractory pain due to TOS. A man in his 40s had received nerve block therapy for right upper extremity pain of unknown origin for 5 years.

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Far ultraviolet-C irradiation at 222 nm has potent bactericidal effects against severe infections such as peritonitis, with minimal cytotoxicity. Bacterial peritonitis due to bowel perforation is a serious condition with high mortality despite current treatments. This study investigated the safety and efficacy of intraperitoneal far ultraviolet-C irradiation at 222 nm.

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  • - Low-intensity pulsed ultrasound (LIPUS) and transcutaneous carbon monoxide (CO) therapy were tested in rats to determine if their combined use would enhance fracture healing more effectively than using either treatment alone.
  • - The study created femoral shaft fractures in rats and divided them into four groups: combination (LIPUS + CO), LIPUS only, CO only, and a control group, treating them regularly for four weeks and assessing bone healing through various methods.
  • - Results showed that the combination group had significantly better fracture healing scores, higher vascular density, and increased gene expression related to bone growth compared to the control and single therapy groups at multiple time points throughout the study.
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  • The study explores the relationship between gluteal muscle condition and postoperative gait outcomes in patients with pertrochanteric fractures, aiming to identify which preoperative muscle measurements best predict gait ability.
  • Using preoperative CT scans to assess muscle cross-sectional area (CSA) and density, researchers hypothesized that higher adjusted CSA and muscle density would correlate with better gait performance post-surgery.
  • Out of 81 patients assessed, 49 met the criteria for inclusion, showing no significant differences in physical attributes between two groups based on their postoperative gait performance: those needing support from parallel bars versus those walking independently.
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  • This study investigated clinical indicators that can help predict relapses in patients with interstitial lung disease (ILD) who have anti-aminoacyl-tRNA synthetase (ARS) antibodies, treated with prednisolone and calcineurin inhibitors.
  • Fifty patients were monitored over a span of up to 4.8 years, where 38% experienced relapses, and researchers analyzed various factors to determine what might signal a relapse.
  • Key findings showed that acute/subacute ILD, high serum levels of aldolase and surfactant protein-D, and low forced vital capacity percentages are significant risk factors, enabling earlier predictions and potentially better management of the condition.
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  • The study identifies a gene from sp. NKBG15041c that improves stress tolerance by encoding a MoxR AAA+ ATPase, named SyMRP.
  • SyMRP exhibits weak ATPase activity and protects certain proteins from heat-induced aggregation, functioning as a chaperone in an ATP-dependent manner.
  • Although it forms a stable hexamer, its structure differs from the typical AAA+ ATPase ring, as evidenced by microscopy techniques and SAXS analysis.
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  • Transcutaneous CO application was shown to enhance muscle fiber-type switching, fracture healing, and bone growth by increasing blood flow and new blood vessel formation.
  • In a rat study, transcutaneous CO treatment prevented muscle atrophy and bone loss that typically occur with inactivity, as seen in the hindlimb suspension model.
  • Results indicated that rats treated with CO had larger muscle fibers, healthier bone structure, and better expression of markers related to muscle and bone growth compared to those not receiving the treatment.
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BACKGROUND Infection control and reconstruction of bone and soft tissue are essential for treating infected nonunion. Continuous local antibiotic perfusion (CLAP) is a drug delivery system that continuously delivers antibiotics at the required concentration, area, and duration. This case report describes the instance of infected nonunion in which infection eradication and bone union were achieved using CLAP and synthetic bone grafting while retaining the implant.

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The interconnected structures in a 3D scaffold allows the movement of cells and nutrients. Therefore, this study aimed to investigate the in-vivo bioactivity of 3D-printed β-tricalcium phosphate (β-TCP) and hydroxyapatite (HAP) scaffolds that replicate biological bone. This study included 24-week-old male New Zealand white rabbits.

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Myocardial injury after non-cardiac surgery is due to ischaemia either during non-cardiac surgery or within 30 days after it. Our surveillance protocol includes hip fracture template and high-sensitivity troponin stratification, as recommended in European countries. Our retrospective study cohort included surgical patients for hip fracture at our hospital in Japan.

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Background: Benzodiazepines are used in pediatric patients with congenital heart disease (CHD) because of their mild hemodynamic depressant effects. A novel short-acting benzodiazepine, remimazolam, is expected to be suitable for these patients. We examined the characteristics of remimazolam anesthesia in pediatric patients with CHD undergoing cardiac catheterization.

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Remimazolam is a short-acting benzodiazepine sedative with a short half-life and little circulatory depression. The safe use of remimazolam in the anesthetic management of an elderly patient with impaired cardiac function is reported. The patient's hemodynamics remained stable, and the patient was managed without serious complications.

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Background: Vaccination is the primary method of preventing influenza infection and complications in young children. We evaluated the efficacy and safety of a single dose of MEDI3250 (intranasal, quadrivalent, live attenuated influenza vaccine) in healthy Japanese children during the 2016/17 influenza season.

Methods: In this multicenter, randomized, double-blind, phase 3 study (jRCT2080223345), participants aged 2-18 years received MEDI3250 or placebo (2:1), stratified by age (2-6 years, 7-18 years).

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Purpose: This Phase III, multicenter, open-label, single-arm study evaluated the safety and immunogenicity of the measles-mumps-rubella (MMR) combined vaccine, JVC-001, as a second MMR vaccination.

Methods: Healthy Japanese children aged 5-6 years received a single dose of JVC-001 following a first measles, mumps, and rubella vaccination (measles-rubella bivalent and mumps monovalent vaccine [Hoshino or Torii strain] or JVC-001) or the MMR vaccine received between ages 1 to <4 years. Immunogenicity was evaluated using antibody titers before and after vaccination (Day 1/Day 43).

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  • There is a lack of widely accepted algorithms for optimal treatment of periprosthetic joint infection (PJI), prompting a study to validate a previously published scoring system for better surgical strategies.
  • A total of 155 revision total hip arthroplasties (THAs) were analyzed, revealing a 10-year survival rate of 98% for one-stage and 87% for two-stage revisions, with a scoring system effectively predicting implant removal risk.
  • The scoring system suggested one-stage revisions for patients scoring 9 or more, while two-stage revisions are recommended for scores of 4 or more, highlighting its usefulness in managing PJI.
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Introduction Preventing the development of postherpetic neuralgia (PHN), the most prevalent and severe complication of herpes zoster (HZ), is vital. Recently, it has been suggested that using temporary spinal cord stimulation (tSCS) for 10-14 days can improve HZ-associated pain (ZAP) and prevent PHN. However, myelitis complicates HZ.

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We report a case of a patient with necrotizing fasciitis and septic shock caused by streptococcal toxic shock syndrome, who was anesthetized and managed with remimazolam. The patient, a woman in her 40s, was admitted to the ICU with a diagnosis of necrotizing fasciitis of the right lower extremity and septic shock and was scheduled for above-the-knee amputation under general anesthesia. She was anesthetized with remimazolam for sedation and fentanyl and remifentanil for analgesia.

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Background: Cardiopulmonary resuscitation is essential for cardiopulmonary arrest, but complications from chest compressions warrant monitoring. Although rib and sternal fractures are common, abdominal injuries are rare, and splenic injuries are much rarer.

Case Presentation: A 74-year-old man was admitted to the emergency room with a hemorrhagic duodenal ulcer.

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  • After total hip arthroplasty, taper-slip stems are more prone to periprosthetic fractures (PPFs) compared to composite-beam stems, prompting a study on their fracture conditions using falling weights.
  • The study involved testing different simulated bone models with taper-slip stems fixed by bone cement to determine the heights at which PPFs occurred.
  • Results indicated that using titanium alloy stems, a smooth surface, a thick cement mantle, and stainless steel may reduce the likelihood of PPFs.
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