
Yusuke KatayamaOsaka University | Handai · Department of Traumatology and Acute Critical Medicine
Yusuke Katayama
Doctor of Medicine
About
101
Publications
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Introduction
Yusuke Katayama currently works at the Department of Traumatology and Acute Critical Medicine, Osaka University. Yusuke does research in Epidemiology, Emergency Medicine and Emergency Medical Care. Their most recent publication is 'Pelvic angiography is effective for emergency pediatric patients with pelvic fractures: a propensity‑score‑matching study with a nationwide trauma registry in Japan'.
Publications
Publications (101)
Purpose
To investigate the relationship between pre-existing medical conditions and outcomes in elderly trauma patients in Japan.
Methods
This multicenter observational study utilized data from the Japan Trauma Data Bank (JTDB) from 2019 to 2020. The primary outcome was in-hospital mortality. Factors associated with in-hospital mortality were iden...
Isolated traumatic spinal cord injury (t-SCI) and traumatic brain injury (TBI) represent significant public health concerns, resulting in long-term disabilities and necessitating sophisticated care, particularly when occurring concurrently. The impact of these combined injuries, while crucial in trauma management, on clinical, socioeconomic, and he...
Background
In many countries, emergency medical systems were responsible for initial treatment of patients with COVID-19. Generally, acceptance by medical institutions may not be sufficient, and it may take much time to determine the medical institution to which to transport the patient. This problem is termed “difficulty in hospital acceptance (DI...
Background
In trauma systems, criteria for individualised and optimised administration of tranexamic acid (TXA), an antifibrinolytic, are yet to be established. This study used nationwide cohort data from Japan to evaluate the association between TXA and in-hospital mortality among all patients with blunt trauma based on clinical phenotypes (trauma...
Background
The novel corona virus (COVID-19) pandemic occurred worldwide. Although an excessive burden was placed on emergency medical institutions treating urgent and severe patients, its impact on patient outcome remains unknown. This study aimed to assess the impact of the COVID-19 pandemic in 2021 on the emergency medical services (EMS) system...
Purpose
The purpose of this study was to evaluate temporal trends of characteristics of severe road traffic injuries in children and identify factors associated with mortality using a nationwide database in Japan.
Methods
We performed a retrospective analysis of Japan Trauma Data Bank (JTDB) from 2004 to 2018. We included patients with traffic inj...
Objectives The COVID-19 pandemic might have affected emergency medical services transports for self-harm in Japan. However, the available data are insufficient to fully understand the pandemic’s impact on ambulance transports due to self-harm. This study aimed to investigate the change in the incidence of ambulance transports for self-harm from 201...
Purpose:
Computed tomography (CT) has become essential for the management of trauma patients. However, appropriate timing of CT acquisition remains undetermined. The purpose of this study was to assess the relationship between time to CT acquisition and mortality among adult patients with severe trauma.
Methods:
We conducted a retrospective coho...
Aim
The impact of the coronavirus disease (COVID-19) pandemic on the emergency medical service system in Japan has not been fully revealed. The purpose of this study was to determine the impact of the COVID-19 pandemic in 2021 on the difficulty in hospital acceptance of patients and patient outcome in Osaka Prefecture.
Methods
This study was a des...
Background: Little is known about the transport and outcomes of emergency patients with cardiocerebrovascular diseases in Japan before and during the COVID-19 pandemic.
Methods and Results: Data were extracted from a population-based registry in Osaka, Japan, from 2019 to 2021. There were almost no differences in the numbers of emergency patients h...
Introduction
The telephone triage service is an emergency medical system through which citizens consult telephone triage nurses regarding illness, and the nurses determine the urgency and need for an ambulance. Despite being introduced in several countries, its impact on emergency patients has not been reported. We aimed to determine the effect of...
The purpose of this study was to describe the characteristics of published international literature using the Japan Trauma Data Bank (JTDB). We undertook a scoping review of studies using data from JTDB. We carried out a systematic search of the following databases on November 21, 2022, using search terms that covers trauma registries in Japan: MED...
Aim
The nationwide impact of the coronavirus disease (COVID-19) pandemic on major trauma in Japan is unknown. The nationwide registry-based data of the Japanese Trauma Data Bank were analyzed to elucidate the impact of COVID-19 on the epidemiology, treatment, and outcomes of major trauma patients.
Methods
Among patients transported directly from t...
Objective:
We aimed to identify the proportion of each medical condition or disease contributing to dizziness and their disposition in the Emergency Department (ED).
Methods:
This retrospective, descriptive study examined data from the Osaka Emergency Information Research Intelligent Operation Network system in Japan for the period from January...
Aim:
The spread of coronavirus disease 2019 (COVID-19) has a widespread impact on emergency medical care systems. However, its effects on the mortality of emergency transportation patients are unclear. This population-based, cross-sectional study investigated how COVID-19 impacted the mortality and outcomes of emergency transportation patients.
M...
Background
Coronavirus disease 2019 (COVID-19), caused by Severe Acute Respiratory Syndrome Coronavirus 2, has spread rapidly around the world.
Objective
To assess the effect of the COVID-19 pandemic on the emergency medical service (EMS) and hospital admission course for children transported by ambulance.
Methods
This study was a retrospective,...
Purpose
Understanding epidemiological patterns in patients with severe sports-related injuries between children and adults is important for injury prevention. We ought to describe the characteristics and outcomes of patients with severe sports-related injuries and compare the characteristics between children and adults.
Methods
We conducted a retr...
Aim:
Self-harm is a common ambulance call and is potentially affected by the COVID-19 pandemic. The aim of this study was to investigate whether the incidence of ambulance transport due to self-harm increased in 2020.
Methods:
We undertook a population-based observational study using a database from the Osaka prefectural government. Ambulance tr...
Background: Large-scale data on cranial nerve injuries are scarce. Methods: This study enrolled 361,706 patients registered in the Japanese Trauma Data Bank from 2004 to 2018. We selected patients with cranial nerve injury using the corresponding Abbreviated Injury Scale codes and examined the incidence and characteristics. Results: In total, 347,1...
Background
Trauma is a heterogeneous condition, and specific clinical phenotypes may identify target populations that could benefit from certain treatment strategies. In this retrospective study, we determined clinical phenotypes and identified new target populations of trauma patients and their treatment strategies.
Methods
We retrospectively ana...
The lack of established diagnostic criteria makes diagnosing blunt cardiac injury difficult. We investigated the factors associated with blunt cardiac injury using the Japan Trauma Data Bank (JTDB) in a multicenter observational study of blunt trauma patients conducted between 2004 and 2018. The primary outcome was the incidence of blunt cardiac/pe...
Purpose
Sex-based differences in post-traumatic mortality have been widely discussed for quite some time. We hypothesized that age-related pathophysiologic changes would affect sex-based differences in post-traumatic mortality and aimed to verify the hypothesis using a nationwide trauma registry in Japan.
Methods
This was a retrospective analysis...
Background:
Blunt traumatic diaphragmatic rupture (TDR) is a rare condition that is seen in patients with blunt thoracoabdominal trauma. However, factors that are associated with blunt TDR have not been fully revealed. The purpose of this study was to evaluate the factors that are associated with blunt TDR in trauma patients with a chest or abdomi...
Background
Ambulatory care sensitive conditions (ACSCs) are defined as clinical conditions for which the risk of emergency hospital admission can be reduced by timely and effective ambulatory care. However, the actual status of patients with ACSCs who are transported by ambulance and their outcomes have not been fully elucidated. The purpose of thi...
Background
Telephone triage service in emergency care has been introduced around the world, but the impact of this service on the emergency medical service (EMS) system has not been fully revealed. The aim of this study was to evaluate the effect of telephone triage service for emergency patients on decreasing unnecessary ambulance use by analysis...
Purpose: The aim of this study was to describe epidemiologic features of pediatric blunt renal trauma.
Methods: We performed a retrospective analysis using the Japan Trauma Data Bank over 15 years. We included patients younger than 18 years with blunt renal trauma. We analyzed temporal trends and variations across age groups in patient characteris...
Objective:
The aim of this study is to reveal the characteristics and outcomes of patients injured in a major earthquake and who were transported to a hospital by ambulance.
Methods:
This study was a retrospective descriptive epidemiological study including all patients who were injured after a major earthquake struck Osaka Prefecture on June 18...
Objective To elucidate the clinical epidemiology and outcomes of patients with coronavirus disease (COVID-19) in the Osaka Prefecture, Japan who received extracorporeal membrane oxygenation (ECMO).
Methods This was a retrospective study of COVID-19 patients who received ECMO. Among patients diagnosed with COVID-19 between January 29, 2020 and Novem...
Background: Coronavirus disease 2019 (COVID-19), caused by Severe Acute Respiratory Syndrome Coronavirus 2, has spread rapidly around the world.
Objective: To assess the effect of the COVID-19 pandemic on the emergency medical service (EMS) and hospital admission course for children transported by ambulance.
Methods: This study was a retrospective,...
Purpose
The aim of this study was to assess the effect of fluid administration by emergency life-saving technicians (ELST) on the prognosis of traffic accident patients by using a propensity score (PS)-matching method.
Methods
The study included traffic accident patients registered in the JTDB database from January 2016 to December 2017. The main...
Background
The coronavirus disease 2019 (COVID‐19), caused by Severe Acute Respiratory Syndrome Coronavirus 2, has spread rapidly across the world.
Objective
To assess the influence of the COVID‐19 pandemic on the emergency medical service (EMS) for transportation of pregnant women by ambulance.
Methods
This study was a retrospective, descriptive...
Objective Telephone triage service in emergency care has been introduced in many countries, and it is important to determine the effect of telephone triage service on the
outcome of emergency patients. The aim of this study was to evaluate the effect of telephone triage service on the outcome of emergency patients using propensity score.
Methods d...
Background:
Early surveillance to prevent the spread of influenza is a major public health concern. If there is an association of influenza epidemics with mobile app data, it may be possible to forecast influenza earlier and more easily.
Objective:
We aimed to assess the relationship between seasonal influenza and the frequency of mobile app use a...
Objectives This study aimed to examine the difference in mortality from serious road traffic injuries during the National Traffic Safety Campaign compared with other periods and identify the common mechanisms of injury by age group in Japan.
Design A retrospective review of Japan Trauma Data Bank (JTDB).
Setting A total of 280 participating major...
Objective: To describe the clinical characteristics and outcomes of reproductive-aged female patients with coronavirus disease 2019 (COVID-19).
Methods We conducted a retrospective study of female patients aged 10–49 years notified with COVID-19 in Osaka, Japan, between January and November 2020. We assessed their epidemiological and clinical chara...
Introduction
Postpartum haemorrhage is a major cause of maternal mortality. Although contrast-enhanced computed tomography (CE-CT) is useful to reveal arterial bleeding, its accuracy in postpartum haemorrhage is unclear. The aim of this study was to evaluate the accuracy of CE-CT scanning in detecting postpartum haemorrhage.
Methods
This was a ret...
Aim
To assess relationships between abdominal angiography and outcomes in adults with blunt liver injuries.
Methods
A retrospective observational study carried out from January 2004 to December 2018. Adult blunt-trauma patients with AAST grade Ⅲ–Ⅴ were analyzed with in-hospital mortality as the primary outcome using propensity-score-(PS) matching...
The emergency medical system, one of the essential elements of public health, has been around for more than 50 years. Although many studies have assessed the factors associated with overcrowding and prolonged length of stay in emergency departments, whether the clinical characteristics and background of a patient are associated with prolonged hospi...
Although the COVID-19 pandemic affects the emergency medical service (EMS) system, little is known about the impact of the COVID-19 pandemic on the prognosis of emergency patients. This study aimed to reveal the impact of the COVID-19 pandemic on the EMS system and patient outcomes. We included patients transported by ambulance who were registered...
Objectives: The spread of COVID-19 has affected the incidence of other infectious
diseases, but there are no reports evaluating the impact of COVID-19 on influenza
incidence using comprehensive regional population-based data. We attempted to
evaluate the impact of COVID-19 on influenza using the population-based ORION
(Osaka Emergency Information R...
Aim
Self-inflicted injury, as one reason to visit the emergency department, is an important issue in emergency medicine around the world. However, the impact of changes in social systems, such as medical reimbursement revision, on ambulance transport for self-inflicted injury remains unclear. The aim of this study was to assess the impact of medica...
Aim
The quick Sequential Organ Failure Assessment (qSOFA) was proposed for use as a simple screening tool for sepsis. In this study, we evaluated the relationship between the prehospital use of qSOFA and prognosis in patients with sepsis or suspected sepsis using the population-based Osaka Emergency Information Research Intelligent Operation Networ...
BACKGROUND
Early surveillance to prevent the spread of influenza is a major public health concern. If there is an association of influenza epidemics with mobile app data, it may be possible to forecast influenza earlier and more easily.
OBJECTIVE
We aimed to assess the relationship between seasonal influenza and the frequency of mobile app use amo...
Aim The epidemiological characteristics, in-hospital treatments and outcomes of coronavirus disease 2019 among older patients have not been fully evaluated in Japan.
Methods In this retrospective observational study carried out in Osaka Prefecture, Japan, we enrolled patients aged ≥60 years with laboratory-confirmed coronavirus disease 2019 from Ja...
The epidemiological and clinical characteristics, treatments, and outcomes of patients with coronavirus disease 2019 (COVID-19) who are admitted to the intensive care unit (ICU) have not been adequately evaluated in Japan. We analyzed the registry data of 205 patients with COVID-19 admitted to the ICU between February and November 2020, in Osaka Pr...
The epidemiological information on characteristics, in-hospital treatments, and outcomes of the coronavirus disease 2019 (COVID-19) among pediatric patients has not been fully evaluated in Japan. This was a retrospective observational study conducted in the Osaka Prefecture, Japan, and we enrolled laboratory-confirmed COVID-19 patients aged ≤ 19 ye...
Aim To assess the impact of the Summit on Financial Markets and the World Economy held in Osaka City, Japan (G20 Osaka Summit) on the emergency medical services (EMS) system.
Methods This study used the ORION database with its population‐based registry of emergency patients comprising both ambulance and in‐hospital records in Osaka Prefecture, Japa...
Purpose
The aim of this study was to evaluate the association between the implementation of pelvic angiography (PA) and outcome in emergency pediatric patients with pelvic fracture.
Methods
We extracted data on pelvic fracture patients aged ≤ 19 years between 2004 and 2015 from a nationwide trauma registry in Japan. The main outcome was hospital m...
Background; Novel corona virus (COVID-19) outbreaks have spread worldwide. Although the COVID-19 pandemic affects the emergency medical service (EMS) system, which is one factor of primary care, little is known about its impact. This study aimed to reveal the impact of the COVID-19 pandemic on the EMS system and outcome of patients transported by a...
Purpose
Posttraumatic meningitis is one of the severe complications that can result in increased mortality and longer hospital stay among trauma patients. Factors such as cerebrospinal fluid (CSF) fistula and basilar skull fracture are associated with posttraumatic meningitis. However, it remains unclear whether procedures such as burr hole surgery...
Background The coronavirus disease (COVID-19) pandemic may have negatively affected bystander interventions, emergency medical service (EMS) personnel activities, and patient outcomes after out-of-hospital cardiac arrest (OHCA). This study assessed bystander interventions, EMS activities, and patient outcomes during the COVID-19 pandemic era and co...
BACKGROUND
When children suffer sudden illness or injury, many parents wonder whether they should go to the hospital immediately or call an ambulance. In 2015, we developed a mobile app that allows parents or guardians to determine the urgency of their child’s condition or call an ambulance, and which indicates available hospitals and clinics when...
Background
When children suffer sudden illness or injury, many parents wonder whether they should go to the hospital immediately or call an ambulance. In 2015, we developed a mobile app that allows parents or guardians to determine the urgency of their child’s condition or call an ambulance and that indicates available hospitals and clinics when th...
Introduction: Postpartum haemorrhage is a major cause of maternal mortality. Although contrast-enhanced computed tomography (CE-CT) is useful to reveal arterial bleeding, its accuracy in postpartum haemorrhage is unclear. The aim of this study was to evaluate the accuracy of CE-CT scanning in detecting postpartum haemorrhage.
Methods: This was a re...
To evaluate the relationship between the procalcitonin value in blood on hospital admission and its subsequent change and prognosis among sepsis patients.
Design:
A single-center, retrospective, observational study.
Setting:
Critical care center in Japan.
Patients:
Sepsis patients 18 years old or older admitted from January 1, 2015, to March...
In Japan, the differences in characteristics, severity, and mortality of novel coronavirus disease (COVID-19) patients between the first and second surges of infections have not been fully understood. This study is a retrospective cohort study of COVID-19 patients confirmed between February 1 and August 31, 2020 in Osaka Prefecture, Japan.
Publicly...
Aim
Details such as diagnosis and outcome of patients transported by ambulance after telephone triage have not been fully revealed. The aim of this study was to reveal profile and outcome about patients transported by ambulance via telephone triage with dataset of telephone triage and population‐based registry for emergency patients.
Methods
This...
Background: There have been no clinical studies to sufficiently reveal the interaction effect generated by combinations of injury regions of multiple trauma. We hypothesized that certain combinations of trauma regions might lead to increased risk of traumatic death and aimed to verify this hypothesis using a nationwide trauma registry in Japan.
Mat...
Background:Our department has been actively involved in burn care and research. The aim of this study was to review the burn patient demographics in our department over 50 years. Methods: This study was a retrospective observational study of changes in burn patient demographics from1968 to 2017.The patient data were obtained from the clinical healt...
Little is known about the epidemiological characteristics of patients with coronavirus disease 2019 (COVID-19) in Japan. This is a retrospective observational study of COVID-19 patients; study was conducted from February 1 to May 31, 2020. We used publicly collected data on cases of COVID-19 confirmed by polymerase chain reaction (PCR) testing in O...
Background: There is a paucity of information for predicting patient outcomes other than the American Association for the Surgery of Trauma (AAST) renal injury scale. The aim of this study was to evaluate the association between the patient characteristics and outcomes of patients with blunt renal trauma using a nationwide database in Japan.
Method...
Background
The emergency medical system, one of the essential elements of public health, has been around for more than 50 years. Although many studies have assessed the factors associated with overcrowding and prolonged length of stay in emergency departments, whether the clinical characteristics and background of a patient are associated with prol...