Publications by authors named "Hiroyuki Hirasawa"

Objectives: Obese patients have lower sepsis mortality termed the "obesity paradox." We hypothesized that lipopolysaccharide, known to be carried within lipoproteins such as very low density lipoprotein, could be sequestered in adipose tissue during sepsis; potentially contributing a survival benefit.

Design: Retrospective analysis.

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Pelvic ring fractures are defined as life-threatening injuries that can be treated surgically with external or internal fixation. The authors report on an 81-year-old woman with an unstable pelvic fracture accompanying multiple traumas that was successfully treated with a less invasive procedure. The patient was injured in a traffic accident and sustained a total of 20 fractures, including pelvic ring, bilateral rib, and lumbar transverse processes fractures, and multiple fractures of both upper and lower extremities.

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Article Synopsis
  • The study aimed to evaluate the effectiveness of two types of continuous veno-venous hemofiltration (CVVH) in reducing blood cytokine levels and improving survival in rats subjected to prolonged cardiac arrest treated with cardiopulmonary bypass.
  • The results showed no significant differences in survival rates, neurological deficits, or blood cytokine levels among the groups, indicating that neither standard nor high-volume hemofiltration provided any benefits compared to the control group.
  • Additionally, while the sham group's blood pressure increased significantly, HVHF led to reduced blood pressure, suggesting potential adverse effects from the hemofiltration treatment.
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This is a guideline for the management of sepsis, developed by the Sepsis Registry Committee of The Japanese Society of Intensive Care Medicine (JSICM) launched in March 2007. This guideline was developed on the basis of evidence-based medicine and focuses on unique treatments in Japan that have not been included in the Surviving Sepsis Campaign guidelines (SSCG), as well as treatments that are viewed differently in Japan and in Western countries. Although the methods in this guideline conform to the 2008 SSCG, the Japanese literature and the results of the Sepsis Registry Survey, which was performed twice by the Sepsis Registry Committee in intensive care units (ICUs) registered with JSICM, are also referred.

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Background: Emerging therapies for prolonged cardiac arrest (CA) include advanced circulatory interventions like emergency cardiopulmonary bypass (ECPB) and continuous venovenous hemofiltration (CVVHF). However, preclinical studies are limited because of the absence of a practical method of using CVVHF along with ECPB in rodents.

Methods: We modified a CA model with ECPB resuscitation to include the CVVHF circuit.

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Background/aim: We investigated the clinical efficacy of continuous hemodiafiltration (CHDF) with AN69ST hemofilter (AN69ST-CHDF) in patients with septic shock.

Materials And Methods: A prospective, multicenter, single-arm study was conducted. Patients with sepsis and shock defined by hyperlactemia were enrolled.

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Continuous hemodiafiltration using a hemofilter made from a membrane with cytokine adsorption properties is thought to be effective to remove cytokines in septic patients. In order to enhance cytokine removal capacity by increasing adsorption area, we devised a double polymethyl methacrylate continuous hemodiafiltration method, which involves serial connection of two polymethyl methacrylate membrane hemofilters, and we report clinical efficacy with this method. Of 74 patients who underwent continuous hemodiafiltration and had interleukin-6 blood levels measured during their ICU stay between March 2010 and June 2012, 13 patients with hypercytokinemia (interleukin-6 blood level >900 pg/mL) underwent series double continuous hemodiafiltration to be treated for hypercytokinemia.

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Many preclinical studies in critical care medicine and related disciplines rely on hypothesis-driven research in mice. The underlying premise posits that mice sufficiently emulate numerous pathophysiologic alterations produced by trauma/sepsis and can serve as an experimental platform for answering clinically relevant questions. Recently, the lay press severely criticized the translational relevance of mouse models in critical care medicine.

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Since the introduction of the new pathophysiological concept of pathogen-associated molecular patterns (PAMPS) and alarmins, endotoxin has been recognized as only one of the PAMPS. It is widely accepted that hypercytokinemia plays a pivotal role in the pathophysiology of sepsis. Many kinds of blood purification modalities have been proposed as a therapeutic tool against sepsis, including high-volume continuous hemofiltration whose efficacy has recently been questioned.

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Objective: Triggering receptor expressed on myeloid cells-1 (TREM-1) was reported to play a key roll in amplification of production of inflammatory cytokines. TREM-1 is suggested to be a specific biomarker for sepsis for this reason, but the clinical significance of TREM-1 has not been elucidated. We investigated TREM-1 expression on the cell-surface, and plasma levels of soluble TREM-1 (sTREM-1) in patients with non-infectious systemic inflammatory response syndrome (SIRS) and sepsis admitted to the ICU.

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Purpose: Detailed procedures for optimal therapeutic hypothermia (TH) have yet to be established. We examined how duration of well-controlled core temperature within the first 24 hours after cardiac arrests (CA) correlated with neurological outcomes of successfully resuscitated out-of-hospital CA (OHCA) patients.

Methods: OHCA patients who survived over 24 hours and treated with TH were included.

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Purpose: Management of sepsis in critically ill patients remains difficult and requires prolonged intensive care. Genetic testing has been proposed as a strategy to identify patients at risk for adverse outcome of critical illnesses. Therefore, we wished to determine the influence of heredity on predisposition to poor outcome and on duration of ventilator support of intensive care unit (ICU) patients.

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Introduction: The aim of the present study was to investigate the relationship between the blood IL-6 level, the blood glucose level, and glucose control in septic patients.

Methods: This retrospective observational study in a general ICU of a university hospital included a total of 153 patients with sepsis, severe sepsis, or septic shock who were admitted to the ICU between 2005 and 2010, stayed in the ICU for 7 days or longer, and did not receive steroid therapy prior to or after ICU admission. The severity of stress hyperglycemia, status of glucose control, and correlation between those two factors in these patients were investigated using the blood IL-6 level as an index of hypercytokinemia.

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Purpose: Cytokines play pivotal roles in the pathophysiology of severe sepsis/septic shock, and continuous hemodiafiltration using a polymethylmethacrylate membrane hemofilter (PMMA-CHDF) removes cytokines efficiently and continuously, mainly through adsorption to a hemofilter membrane. The aim of this study was to investigate the clinical efficacy of enhanced intensity PMMA-CHDF in treating refractory septic shock.

Methods: Seventy-two septic shock patients admitted to the intensive care unit (ICU) underwent critical care including PMMA-CHDF.

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Introduction: Sivelestat, a neutrophil elastase inhibitor, has been approved in Japan for the treatment of patients with acute lung injury (ALI) associated with systemic inflammatory response syndrome (SIRS). The Pharmaceuticals and Medical Devices Agency (PMDA) has ordered to conduct a postmarket clinical study in order to reevaluate the efficacy and safety of Sivelestat in actual clinical settings in Japan.

Methods: According to the PMDA's order, we evaluated the efficacy and safety of Sivelestat in Japanese patients with ALI associated with SIRS using ventilator-free days (VFD) as the primary endpoint.

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Article Synopsis
  • The study investigates how genetic variations in angiotensin II pathway genes affect outcomes in septic shock patients.
  • The research involved a genetic association study and in vitro experiments, focusing on patients in intensive care units.
  • Results showed that a specific genetic variant (GG genotype of the angiotensin II type 1 receptor-associated protein) was linked to higher 28-day mortality and decreased mean arterial pressure in septic shock patients.
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Article Synopsis
  • Vasopressin is a crucial hormone that helps regulate blood pressure and is sometimes used in treating septic shock.
  • Researchers studied the relationship between specific genetic variations (SNPs) in vasopressin pathway genes and patient outcomes, focusing on 28-day mortality and vasopressin clearance in two groups (589 and 616 patients) and a third group related to serum sodium levels (977 patients).
  • A notable SNP in the LNPEP gene (rs4869317) was linked to higher 28-day mortality rates and increased vasopressin clearance, indicating that genetic factors can significantly influence patient survival and sodium balance in septic shock.
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Genetic polymorphisms have recently been found to be related to clinical outcome in septic patients. The present study investigated to evaluate the influence of genetic polymorphisms in Japanese septic patients on clinical outcome and whether use of genetic polymorphisms as predictors would enable more accurate prediction of outcome. Effects of 16 genetic polymorphisms related to pro-inflammatory mediators and conventional demographic/clinical parameters (age, sex, past medical history, and APACHE II score) on ICU mortality as well as disease severity during ICU stay were examined in the septic patients (n=123) admitted to the ICU between October 2001 and November 2007 by multivariable logistic regression analysis.

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