Publications by authors named "Masafumi Kishimoto"

A 72-year-old man presented with severe pulmonary contusions and multiple traumas, including aortic injury, pelvic fracture, and renal injury. The patient required multidisciplinary treatment, including transcatheter arterial embolization, thoracic endovascular aortic repair, right lung upper lobe partial resection, and massive transfusion. During the initial treatment, the patient experienced respiratory failure due to endotracheal bleeding, and we attempted isolated lung ventilation with a 37 Fr double-lumen endotracheal intubation tube.

View Article and Find Full Text PDF

Background: Few prediction models for individuals with early-stage out-of-hospital cardiac arrest (OHCA) have undergone external validation. This study aimed to externally validate updated prediction models for OHCA outcomes using a large nationwide dataset.

Methods And Results: We performed a secondary analysis of the JAAM-OHCA (Comprehensive Registry of In-Hospital Intensive Care for Out-of-Hospital Cardiac Arrest Survival and the Japanese Association for Acute Medicine Out-of-Hospital Cardiac Arrest) registry.

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to investigate how long it takes to reach temperature targets during targeted temperature management for patients who experienced out-of-hospital cardiac arrest and how this affects their neurological outcomes one month later.
  • Researchers analyzed data from 473 patients transported to hospitals in Osaka, Japan, focusing on their neurological status assessed by the Cerebral Performance Category scale one month after the incident.
  • Results showed that achieving target temperatures faster was linked to better neurological outcomes, with the fourth quintile (175.2-352.1 minutes) having the highest percentage of favorable outcomes compared to the other time frames.
View Article and Find Full Text PDF

Aim: This study aimed to examine the utility of simultaneously performed the Film Array pneumonia panels (pneumonia panels) and Gram staining with the same specimens and evaluate their effect on antimicrobial selection.

Methods: This prospective study, conducted from April 2022 to January 2023, enrolled adult patients with pneumonia, including those with ventilator-associated pneumonia (VAP). Specimens obtained at the time of sputum culture were tested using Gram staining and the pneumonia panel.

View Article and Find Full Text PDF
Article Synopsis
  • ECPR is being explored as a potential life-saving treatment for patients who experience out-of-hospital cardiac arrest (OHCA), focusing on how it impacts survival and brain function outcomes.
  • The study analyzed data from a large registry, comparing ECPR-treated patients with a control group and considering factors like initial heart rhythm (shockable vs. non-shockable) to evaluate the effectiveness of ECPR.
  • Results indicated that ECPR significantly improved survival rates after 30 days, particularly for patients with non-shockable rhythms, suggesting further research is needed to explore its full potential and identify the best candidates for this treatment.
View Article and Find Full Text PDF
Article Synopsis
  • * The research used data from a Japanese registry and found 2738 applicable patients from a larger group of 57,754 who had non-traumatic shockable OHCA.
  • * Results indicated that while IABP appeared less effective in the original analysis, using a different statistical approach showed no significant difference in favorable outcomes between patients with and without IABP.
View Article and Find Full Text PDF

Background: Singapore and Osaka in Japan have comparable population sizes and prehospital management; however, the frequency of ECPR differs greatly for out-of-hospital cardiac arrest (OHCA) patients with initial shockable rhythm. Given this disparity, we hypothesized that the outcomes among the OHCA patients with initial shockable rhythm in Singapore were different from those in Osaka. The aim of this study was to evaluate the outcomes of OHCA patients with initial shockable rhythm in Singapore compared to the expected outcomes derived from Osaka data using machine learning-based prediction models.

View Article and Find Full Text PDF

A 22-year-old male presented to our hospital after receiving 2450 mg of pilsicainide hydrochloride. Subsequently, he experienced cardiac arrest, and percutaneous cardiopulmonary support was introduced to maintain his circulation. After 3 days of intensive care, he regained consciousness and was transferred to another hospital for treatment related to psychological problems.

View Article and Find Full Text PDF
Article Synopsis
  • This study evaluated how effective ECG findings, specifically STEMI equivalents, are in diagnosing acute coronary syndrome in patients who experienced out-of-hospital cardiac arrest (OHCA).
  • Researchers analyzed data from a registry between 2012 and 2017, focusing on patients who had specific ECG patterns upon achieving return of spontaneous circulation (ROSC).
  • The results indicated that while certain ECG signs like isolated T-wave inversion and Wellens' signs had high specificity for ACS, their overall diagnostic accuracy was low, suggesting that more research is needed to understand the timing of ECG assessments after ROSC.
View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to validate the TiPS65 score, which predicts neurological outcomes for patients with out-of-hospital cardiac arrest (OHCA) treated with extracorporeal cardiopulmonary resuscitation (ECPR).
  • Data were analyzed from a nationwide registry of OHCA cases, focusing on adult patients with shockable rhythms treated with ECPR, using factors like age and initial cardiac rhythm as predictors.
  • Results showed that while the TiPS65 score had reasonable predictive ability, only 10.8% of patients had favorable neurological outcomes, indicating that the score can assist in selecting appropriate candidates for ECPR.
View Article and Find Full Text PDF

Background: We aimed to investigate the association between blood urea nitrogen to creatinine ratio (BCR) and survival with favourable neurological outcomes in patients with out-of-hospital cardiac arrest (OHCA).

Methods: This prospective, multicentre, observational study conducted in Osaka, Japan enrolled consecutive OHCA patients transported to 16 participating institutions from 2012 through 2019. We included adult patients with non-traumatic OHCA who achieved a return of spontaneous circulation and whose blood urea nitrogen and creatinine levels on hospital arrival were available.

View Article and Find Full Text PDF

Aim: Extracorporeal cardiopulmonary resuscitation (ECPR) is performed in refractory out-of-hospital cardiac arrest (OHCA) patients, and the eligibility has been conventionally determined based on three criteria (initial cardiac rhythm, time to hospital arrival within 45 minutes, and age <75 years) in Japan. Owing to limited information, this study descriptively determined neurological outcomes after applying the three criteria among OHCA patients who underwent ECPR.

Methods: This study conducted a post-hoc analysis of data from the Comprehensive Registry of Intensive Care for OHCA Survival (CRITICAL) study.

View Article and Find Full Text PDF

Aim: We aimed to identify subphenotypes among patients with out-of-hospital cardiac arrest (OHCA) with initial non-shockable rhythm by applying machine learning latent class analysis and examining the associations between subphenotypes and neurological outcomes.

Methods: This study was a retrospective analysis within a multi-institutional prospective observational cohort study of OHCA patients in Osaka, Japan (the CRITICAL study). The data of adult OHCA patients with medical causes and initial non-shockable rhythm presenting with OHCA between 2012 and 2016 were included in machine learning latent class analysis models, which identified subphenotypes, and patients who presented in 2017 were included in a dataset validating the subphenotypes.

View Article and Find Full Text PDF

Background: The association between spontaneous initial body temperature on hospital arrival and neurological outcomes has not been sufficiently studied in patients after out-of-hospital cardiac arrest (OHCA).

Methods: From the prospective database of the Comprehensive Registry of Intensive Care for OHCA Survival (CRITICAL) study in Osaka, Japan, we enrolled all patients with OHCA of medical origin aged > 18 years for whom resuscitation was attempted and who were transported to participating hospitals between 2012 and 2019. We excluded patients who were not witnessed by bystanders and treated by a doctor car or helicopter, which is a car/helicopter with a physician.

View Article and Find Full Text PDF

Dysnatremia is an electrolytic disorder commonly associated with mortality in various diseases. However, little is known about dysnatremia in out-of-hospital cardiac arrest (OHCA) cases. Here, we investigated the association between serum sodium level on hospital arrival and neurological outcomes after OHCA.

View Article and Find Full Text PDF

Background: The hypothesis of this study is that latent class analysis could identify the subphenotypes of out-of-hospital cardiac arrest (OHCA) patients associated with the outcomes and allow us to explore heterogeneity in the effects of extracorporeal cardiopulmonary resuscitation (ECPR).

Methods and results: This study was a retrospective analysis of a multicenter prospective observational study (CRITICAL study) of OHCA patients. It included adult OHCA patients with initial shockable rhythm.

View Article and Find Full Text PDF

Aim: To develop and validate a model for the early prediction of long-term neurological outcome in patients with non-traumatic out-of-hospital cardiac arrest (OHCA).

Methods: We analysed multicentre OHCA registry data of adult patients with non-traumatic OHCA who experienced return of spontaneous circulation (ROSC) and had been admitted to the intensive care unit between 2013 and 2017. We allocated 1329 (2013-2015) and 1025 patients (2016-2017) to the derivation and validation sets, respectively.

View Article and Find Full Text PDF
Article Synopsis
  • The study aimed to examine changes over time in the management and outcomes of adult patients who experienced out-of-hospital cardiac arrest (OHCA) from 2013 to 2017 in Osaka, Japan.
  • Researchers analyzed data from nearly 10,228 adult OHCA patients who received resuscitation and were hospitalized, focusing on 1-month survival rates with favorable neurological outcomes.
  • Although the use of advanced treatments like extracorporeal cardiopulmonary resuscitation (ECPR) increased, the proportion of patients achieving favorable neurological outcomes remained largely unchanged during the study period.
View Article and Find Full Text PDF

We aimed to investigate the association between serum lactate levels during cardiopulmonary resuscitation (CPR) and survival in patients with out-of-hospital cardiac arrest (OHCA). From the database of a multicenter registry on OHCA patients, we included adult nontraumatic OHCA patients transported to the hospital with ongoing CPR. Based on the serum lactate levels during CPR, the patients were divided into four quartiles: Q1 (≤ 10.

View Article and Find Full Text PDF

Importance: Extracorporeal cardiopulmonary resuscitation (ECPR) is expected to improve the neurological outcomes of patients with refractory cardiac arrest; however, it is invasive, expensive, and requires substantial human resources. The ability to predict neurological outcomes would assist in patient selection for ECPR.

Objective: To develop and validate a prediction model for neurological outcomes of patients with out-of-hospital cardiac arrest with shockable rhythm treated with ECPR.

View Article and Find Full Text PDF

Background: There is limited information on the predictive accuracy of commonly used predictors, such as lactate, pH or serum potassium for the survival among out-of-hospital cardiac arrest (OHCA) patients with hypothermia. This study aimed to identify the predictive accuracy of these biomarkers for survival among OHCA patients with hypothermia.

Methods: In this retrospective analysis, we analyzed the data from a multicenter, prospective nationwide registry among OHCA patients transported to emergency departments in Japan (the JAAM-OHCA Registry).

View Article and Find Full Text PDF

Background: We aimed to identify the association of pH value in blood gas assessment with neurological outcome among out-of-hospital cardiac arrest (OHCA) patients treated by extracorporeal cardiopulmonary resuscitation (ECPR).

Methods: We retrospectively analyzed the database of a multicenter prospective observational study on OHCA patients in Osaka prefecture, Japan (CRITICAL study), from July 1, 2012 to December 31, 2016. We included adult OHCA patients treated by ECPR.

View Article and Find Full Text PDF