Publications by authors named "Toshio Naka"

Pulmonary tumor thrombotic microangiopathy (PTTM) is a rapidly progressive and often fatal pulmonary disease induced by tumor emboli within the small pulmonary arteries. PTTM presents clinically as progressive hypoxia and pulmonary hypertension. Most cases of PTTM are caused by an adenocarcinoma of the stomach.

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Background: The impact of hybrid dialysis therapies on amino acid (AA) balance in critically ill patients with acute kidney injury is unknown.

Methods: We examined prospectively the AA balance with extended daily diafiltration (EDDF).

Results: We studied 7 patients.

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Background: We investigated whether early initiation of hemoperfusion with a polymyxin B cartridge (PMX) after the diagnosis of septic shock could improve the clinical outcome.

Methods: A prospective, open-labeled, multicenter cohort study was performed at intensive care units in Japan. 41 patients received PMX within 6 h after the diagnosis of septic shock (early group) and 51 patients were treated after 6 h (late group).

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Plasma diafiltration (PDF) is a blood purification therapy in which simple plasma exchange (PE) is performed using a selective membrane plasma separator while the dialysate flows outside the hollow fibers. A prospective, multicenter study was undertaken to evaluate the changes in bilirubin, IL-18, and cystatin C, as well as the 28-day and 90-day survival rates, with the use of PDF according to the level of severity as measured by the Model for End-Stage Liver Disease (MELD) score. Twenty-one patients with liver failure were studied: 10 patients had fulminant hepatitis and PDF therapies were performed 28 times; 11 had acute liver failure with the therapy performed 96 times.

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Recently, 'super high-flux' (SHF) or 'high cut-off' (HCO) membranes have been developed to increase the clearance of inflammatory mediators. In the experimental and clinical settings, SHF/HCO membranes appear to achieve greater clearance of inflammatory cytokines than conventional high-flux membranes. SHF/HCO membranes also restore immune cell function, attenuate hemodynamic instability and decrease plasma IL-6 levels.

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This study was designed to compare the efficacy of transcatheter arterial embolization (TAE) with N-butyl cyanoacrylate (NBCA) or gelatin sponge particles (GSP) for acute arterial bleeding in a coagulopathic condition using a swine model. Four healthy swine were divided into two coagulopathic conditions: mild and severe. Five hemorrhages were created in each swine (10 hemorrhages per coagulopathy).

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The impressive correlation between cardiovascular disease and alterations in glucose metabolism has raised the likelihood that atherosclerosis, heart failure, and type 2 diabetes may share common antecedents. Postprandial hyperglycemia has been shown to play an important role on the onset and development of heart failure and cerebral infarction in several large-scale clinical trials. Recently, chronic hyperglycemia has been reported to enhance the vasoconstrictor response by Rho-kinase.

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Aims: To explore whether fluid resuscitation with normal saline or 4% albumin is associated with differential changes in routine clinical coagulation tests.

Design: Substudy from a large double-blind randomised controlled trial, the SAFE (Saline versus Albumin Fluid Evaluation) study.

Setting: Three general intensive care units.

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Purpose: To evaluate the outcome of transcatheter arterial embolization with gelatin sponge particles, microcoils, and N-butyl cyanoacrylate (NBCA) for acute arterial hemorrhage in the setting of coagulopathy.

Materials And Methods: Coagulopathy is defined by a platelet count less than 5 x 10(4)/microL and/or International Normalized Ratio (INR) greater than 1.5.

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Aldosterone (Aldo) is recognized as an important risk factor for cardiovascular diseases. IL-18 induces myocardial hypertrophy, loss of contractility of cardiomyocytes, and apoptosis leading myocardial dysfunction. However, so far, there have been few reports concerning the interaction between Aldo and IL-18.

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Interleukin-18 (IL-18) is a proinflammatory cytokine with multiple biological functions. We and others have demonstrated that an increased level of circulating IL-18 is one of the risk factors for cardiovascular diseases. Endothelin-1 (ET-1) has been reported to be a potent hypertrophy-promoting factor through RhoA and Rho-Kinase.

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Viral vector systems are efficient for transfection of foreign genes into many tissues. Especially, retrovirus based vectors integrate the transgene into the genome of the target cells, which can sustain long term expression. However, it has been demonstrated that the transduction efficiency using retrovirus is relatively lower than those of other viruses.

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Background And Aims: Continuous veno-venous haemofiltration (CVVH) is an established treatment for acute renal failure (ARF). Recently, extended intermittent dialytic techniques have been proposed for the treatment of ARF. The aim of this study was to compare these two approaches.

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Objective: To test whether fluid resuscitation with normal saline or 4% albumin is associated with differential changes in acid-base status and serum electrolytes.

Design: Nested cohort study.

Setting: Three general intensive care units.

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Introduction: The purpose of the present study was to measure the incidence and outcome of septic patients presenting at the emergency department (ED) with criteria for early goal-directed therapy (EGDT).

Method: This hospital-based, retrospective, observational study using prospectively collected electronic databases was based in a teaching hospital in Melbourne, Australia. We conducted outcome-blinded electronic screening of patients with infection admitted via the ED from 1 January 2000 to 30 June 2003.

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Neutrophil activates and injures tissues and organs during sepsis or septic shock. Blood purification therapies such as continuous veno-venous hemofiltration (CVVH) and direct hemoperfusion with polymyxin-immobilized fiber (PMX-DHP) have been used for the treatment of sepsis and septic shock, however, the effects of such therapies on neutrophil activation have previously been poorly understood. We sought to evaluate neutrophil reactive oxygen species (ROS), especially H2O2 production, in the pathophysiology of sepsis or septic shock and the effect of CVVH or PMX-DHP on neutrophil ROS.

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Objective: To test the ability of a novel super high-flux (SHF) membrane with a larger pore size to clear myoglobin from serum.

Setting: The intensive care unit of a university teaching hospital.

Subject: A patient with serotonin syndrome complicated by severe rhabodomyolysis and oliguric acute renal failure.

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Objective: To assess multicentre, randomised, controlled trials (MC-RCTs) of systemic inflammatory response syndrome (SIRS) and sepsis conducted in Japan, published in Japanese and not available to English-language medical databases.

Design: Methodological review.

Subjects: All Japanese RCTs relevant to SIRS and sepsis.

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Acid-base disorders are common in critically ill patients. Metabolic acid-base disorders are particularly common in patients who require acute renal replacement therapy. In these patients, metabolic acidosis is common and multifactorial in origin.

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