Publications by authors named "Yuki Kishihara"

Objectives: Optimal timing of adrenaline administration in pediatric out-of-hospital cardiac arrest (OHCA) is unclear. We aimed to evaluate the impact of early versus late adrenaline administration on survival and neurological outcomes at one month in children experiencing OHCA with non-shockable rhythm.

Methods: This study is retrospective cohort study.

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  • Early identification of patients at high risk for PIVC-related phlebitis is crucial to prevent complications associated with medical devices.
  • The study developed and validated four machine learning models to predict phlebitis incidence in critically ill patients, using a large dataset of 3429 PIVCs.
  • Results showed that the Random Survival Forest (RSF) model had the best performance for predicting phlebitis, while key predictive factors included insertion site, catheter material, age, and medication use.
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Aim Of The Study: Peripheral intravascular catheter (PIVC) insertion is frequently performed in the emergency room (ER) and many failures of initial PIVC insertion occur. To reduce the failures, new needles were developed. This study aimed to investigate whether the use of the newly developed needle reduced the failure of initial PIVC insertion in the ER compared with the use of the existing needle.

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  • The study investigates the effectiveness of hybrid emergency room systems (HERSs) in treating acute ischemic stroke (AIS) by comparing them to conventional emergency care methods.
  • It analyzed data from 83 patients who received endovascular therapy, focusing on treatment timing and neurological outcomes after 30 days.
  • While HERS showed shorter treatment times (door-to-puncture and door-to-recanalization), there was no significant difference in the percentage of patients achieving favorable neurological outcomes between HERS and conventional groups.
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  • Status epilepticus (SE) is a serious condition that requires effective second-line antiepileptic drugs (AEDs), but it's unclear which ones are best to use.
  • * A network meta-analysis was conducted reviewing multiple randomized controlled trials to compare the efficacy of several second-line AEDs, including fosphenytoin, lacosamide, levetiracetam, phenytoin, phenobarbital, and valproate.
  • * Results indicated that phenobarbital (PHB) may be the most effective for terminating seizures, but the overall confidence in the findings was very low, especially regarding the comparison of adverse events.
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Objective: The objective was to investigate whether early advanced airway management during the entire resuscitation period is associated with favorable neurological outcomes and survival in patients with out-of-hospital cardiac arrest (OHCA).

Methods: We performed a retrospective cohort study of patients with OHCA aged ≥18 years enrolled in OHCA registry in Japan who received advanced airway management during cardiac arrest between June 2014 and December 2020. To address resuscitation time bias, we performed risk set matching analyses in which patients who did and did not receive advanced airway management were matched at the same time point (min) using the time-dependent propensity score; further, we compared early (≤10 min) and late (>10 min) advanced airway management.

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  • * The patient showed severe symptoms related to naphazoline intoxication, including bradycardia and high blood pressure, prompting treatment with phentolamine and nicardipine under careful monitoring of systemic vascular resistance.
  • * Successful treatment led to normalization of vascular resistance and the patient was discharged after four days, indicating the effectiveness of using advanced monitoring systems to manage such cases.
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Study Objective: To determine the association between early versus late advanced airway management and improved outcomes in pediatric out-of-hospital cardiac arrest.

Methods: We performed a retrospective cohort study using data from the out-of-hospital cardiac arrest registry in Japan. We included pediatric patients (<18 years) with out-of-hospital cardiac arrest who had received advanced airway management (tracheal intubation, supraglottic airway, and esophageal obturator).

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Background: Out-of-hospital cardiac arrest (OHCA) is a serious condition. The volume-outcome relationship and various post-cardiac arrest care elements are believed to be associated with improved neurological outcomes. Although previous studies have investigated the volume-outcome relationship, adjusting for post-cardiac arrest care, intra-class correlation for each institution, and other covariates may have been insufficient.

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Aim: To investigate an association between failure of initial peripheral intravascular catheter (PIVC) insertion and adverse events in patients admitted to the intensive care unit (ICU) from the emergency room (ER).

Methods: This study was a post hoc analysis of the AMOR-VENUS study, a multicenter cohort study that included 22 institutions and 23 ICUs in Japan between January and March of 2018. Study participants included consecutive adult patients admitted to the ICU with PIVCs inserted in ICU during the study period exclusively from the ER.

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  • A network meta-analysis was conducted to assess the effects of different timings of tracheostomy on the prognosis of mechanically ventilated patients through data from randomized control trials (RCTs).
  • The study categorized tracheostomy timing into three groups: ≤4 days, 5-12 days, and ≥13 days, with the main focus on short-term mortality until hospital discharge.
  • The findings indicated that performing tracheostomy within 4 days significantly reduced short-term mortality compared to performing it after 13 days, while no significant difference was found between the other timing intervals.
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  • * It highlights new guidance developed by a working group on managing heat stroke amidst the COVID-19 pandemic, incorporating updated research from multiple sources.
  • * The second edition of this guidance focuses on critical aspects such as indoor ventilation, mask safety, and the isolation of older adults, aiming to improve prevention and treatment strategies for heat stroke during the ongoing pandemic.
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Aim: The study aimed to determine the current status of face mask use, deep body temperature measurement, and active cooling in patients suffering from heat stroke and heat exhaustion in Japan.

Methods: This was a prospective, observational, multicenter study using data from the Heatstroke STUDY 2020-2021, a nationwide periodical registry of heat stroke and heat exhaustion patients. Based on the Bouchama heatstroke criteria, we classified the patients into two groups: severe and mild-to-moderate.

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Background: Collecting blood cultures from indwelling arterial catheters is an attractive option in critically ill adult patients when peripheral venipuncture is difficult. However, whether the contamination proportion of blood cultures from arterial catheters is acceptable compared with that from venipuncture is inconclusive.

Research Question: Is contamination of blood cultures from arterial catheters noninferior to that from venipuncture in critically ill adult patients with suspected bloodstream infection?

Study Design And Methods: In this multicenter prospective diagnostic study conducted at five hospitals, we enrolled episodes of paired blood culture collection, each set consisting of blood drawn from an arterial catheter and another by venipuncture, were obtained from critically ill adult patients with cilinical indication.

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The HIV-1 capsid is a shell that encapsulates viral RNA, and forms a conical structure by assembling oligomers of capsid (CA) proteins. Since the CA proteins are highly conserved among many strains of HIV-1, the inhibition of the CA function could be an appropriate goal for suppression of HIV-1 replication, but to date, no drug targeting CA has been developed. Hydrophobic interactions between two CA molecules through Trp184 and Met185 in the protein are known to be indispensable for conformational stabilization of the CA multimer.

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Introduction: Peripheral intravascular catheters (PIVCs) are inserted in most patients admitted to the intensive care unit (ICU). Previous research has discussed various risk factors for phlebitis, which is one of the complications of PIVCs. However, previous studies have not investigated the risk factors based on the patient's severity of illness, such as the Acute Physiology and Chronic Health Evaluation (APACHE) II score.

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Introduction: Phlebitis is an important complication in patients with peripheral intravascular catheters (PIVCs). Although an association between body mass index (BMI) and phlebitis has been suggested, the risk of phlebitis according to BMI has not been well elucidated. Therefore, in this study, we analyzed the risk of phlebitis according to BMI in patients in the intensive care unit (ICU).

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Aim: To investigate the effect of intra-aortic balloon pump (IABP) use after extracorporeal membrane oxygenation-assisted cardiopulmonary resuscitation (ECPR) on short-term neurological outcomes and survival in patients with out-of-hospital cardiac arrest (OHCA).

Methods: We retrospectively analysed data collected between June 2014 and December 2019 from the Japanese OHCA registry. Adult patients (aged ≥18 years) who underwent ECPR were included.

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Background: Out-of-hospital cardiac arrest (OHCA) with shockable rhythms, including ventricular fibrillation and pulseless ventricular tachycardia, is associated with better prognosis and neurological outcome than OHCA due to other rhythms. Antiarrhythmic drugs, including lidocaine and amiodarone, are often used for defibrillation. This study aimed to compare the effects of lidocaine and amiodarone on the prognosis and neurological outcome of patients with OHCA due to shockable rhythms in a real-world setting.

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  • Fluid creep, primarily from fluids used as drug diluents and to keep catheters patent, significantly contributes to fluid intake in critically ill patients, particularly those with respiratory support.
  • A study analyzed data from 588 ICU patients in Japan and found that fluid creep was about 25.2% of total intravenous fluid volume within the first 24 hours, with an increasing trend during their ICU stay, especially in those with severe hypoxemia.
  • The research indicated that while fluid creep reduced over time in patients without hypoxemia or with mild hypoxemia, those with severe hypoxemia continued to experience a high burden of fluid creep throughout their ICU care.
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  • - The 2021 ARDS Clinical Practice Guideline expands on the previous edition by including 15 clinical questions (CQs) for children along with 46 for adults, using systematic review methods and the GRADE system to determine recommendations.
  • - Key recommendations for adult ARDS patients include limiting tidal volume during mechanical ventilation, avoiding excessive targeting of SpO2/PaO2, and recommending low-dose steroids, while also advising against certain diagnostic tools and high-dose steroids.
  • - Pediatric ARDS recommendations include suggesting prone positioning for moderate cases and caution against using non-invasive respiratory support and inhalation therapy, emphasizing a tailored approach to treatment based on the latest evidence.
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  • The ARDS Clinical Practice Guideline 2021 is a collaborative effort by Japanese medical societies to update the previous guidelines for managing Acute Respiratory Distress Syndrome (ARDS), now including recommendations for both adults and children.
  • The new guideline expands on the 2016 version by introducing a total of 61 clinical questions (CQs), which were investigated using systematic reviews and meta-analyses to determine recommendations based on evidence.
  • Key recommendations include avoiding certain diagnostic practices for pneumonia in adults, suggesting specific ventilation strategies, and advocating for low-dose steroids, while also providing tailored advice for pediatric patients regarding positioning and the use of respiratory support.
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Background: To investigate the impact of hyperoxia that developed immediately after extracorporeal membrane oxygenation (ECMO)-assisted cardiopulmonary resuscitation (ECPR) on patients' short-term neurological outcomes after out-of-hospital cardiac arrest (OHCA).

Methods: This study retrospectively analyzed data from the Japanese OHCA registry from June 2014 to December 2017. We analyzed adult patients (≥ 18 years) who had undergone ECPR.

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Background: Phlebitis is an important complication occurring in patients with peripheral intravascular catheters (PIVCs). The risk factors for phlebitis in the intensive care unit (ICU) was examined.

Methods: A secondary analysis of a prospective multicenter cohort study was conducted, involving 23 ICUs in Japan-the AMOR-VENUS study.

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Introduction: Sudden cardiac arrest causes numerous deaths worldwide. High-quality chest compressions are important for good neurological recovery. Arterial pressure is considered useful to monitor the quality of chest compressions by the American Heart Association.

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