Publications by authors named "Jonathan Casey"

Background: Airway management is a critical component of the care of patients experiencing cardiac arrest, but data from randomized trials on the use of video vs direct laryngoscopy for intubation in the setting of cardiac arrest are limited. Current AHA guidelines recommend placement of an endotracheal tube either during CPR or shortly after return of spontaneous circulation but do not provide guidance around intubation methods, including the choice of laryngoscope.

Research Question: Does use of video laryngoscopy improve the incidence of successful intubation on the first attempt, compared to use of direct laryngoscopy, among adults undergoing tracheal intubation after experiencing cardiac arrest?

Study Design And Methods: This secondary analysis of the Direct versus Video Laryngoscope (DEVICE) trial compared video laryngoscopy versus direct laryngoscopy in the subgroup of patients who were intubated following cardiac arrest.

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Background: Patients with sepsis frequently require invasive mechanical ventilation. How oxygenation during mechanical ventilation affects clinical outcomes for patients with sepsis remains uncertain.

Research Question: To evaluate the effects of different oxygen saturation targets on clinical outcomes for patients with sepsis receiving mechanical ventilation.

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Objectives: Diabetes mellitus has been associated with greater difficulty of tracheal intubation in the operating room. This relationship has not been examined for tracheal intubation of critically ill adults. We examined whether diabetes mellitus was independently associated with the time from induction of anesthesia to intubation of the trachea among critically ill adults.

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Importance: Fostamatinib, a spleen tyrosine kinase inhibitor, has been reported to improve outcomes of COVID-19.

Objective: To evaluate the efficacy and safety of fostamatinib in adults hospitalized with COVID-19 and hypoxemia.

Design, Setting, And Participants: This multicenter, phase 3, placebo-controlled, double-blinded randomized clinical trial was conducted at 41 US sites and 21 international sites between November 17, 2021, and September 27, 2023; the last follow-up visit was December 31, 2023.

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Background: clinical guidelines recommend initiation of antiviral therapy as soon as possible for patients hospitalized with confirmed or suspected influenza.

Methods: A multicenter US observational sentinel surveillance network prospectively enrolled adults (aged ≥18 years) hospitalized with laboratory-confirmed influenza at 24 hospitals during October 1, 2022-July 21, 2023. A multivariable proportional odds model was used to compare peak pulmonary disease severity (no oxygen support, standard supplemental oxygen, high-flow oxygen/non-invasive ventilation, invasive mechanical ventilation, or death) after the day of hospital admission among patients starting oseltamivir treatment on the day of admission (early) versus those who did not (late or not treated), adjusting for baseline (admission day) severity, age, sex, site, and vaccination status.

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The advances in minimally invasive lung cancer diagnostics of the last decade have transformed patient care but have also raised important concerns about the regulatory processes used to approve new devices and the best way to generate data to support their use. Disruptive technologies, such as robotic bronchoscopy, have been widely adopted by interventional pulmonologists in the absence of robust data demonstrating improved patient outcomes. Comparative research is needed to inform patient care, but traditional methods of conducting clinical trials in which research teams operate separately from clinical teams are ill-suited to testing the safety and effectiveness of technologies being introduced on the market at unprecedented speed.

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Background: In test-negative studies of vaccine effectiveness (VE), including patients with co-circulating, vaccine-preventable, respiratory pathogens in the control group for the pathogen of interest can introduce a downward bias on VE estimates.

Methods: A multicenter sentinel surveillance network in the US prospectively enrolled adults hospitalized with acute respiratory illness from September 1, 2022-March 31, 2023. We evaluated bias in estimates of VE against influenza-associated and COVID-19-associated hospitalization based on: inclusion vs exclusion of patients with a co-circulating virus among VE controls; observance of VE against the co-circulating virus (rather than the virus of interest), unadjusted and adjusted for vaccination against the virus of interest; and observance of influenza or COVID-19 against a sham outcome of respiratory syncytial virus (RSV).

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Background: Assessments of COVID-19 vaccine effectiveness are needed to monitor the protection provided by updated vaccines against severe COVID-19. We evaluated the effectiveness of original monovalent and bivalent (ancestral strain and Omicron BA.4/5) COVID-19 vaccination against COVID-19-associated hospitalization and severe in-hospital outcomes.

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Study Objective: To examine the association between the neuromuscular blocking agent received (succinylcholine versus rocuronium) and the incidences of successful intubation on the first attempt and severe complications during tracheal intubation of critically ill adults in an emergency department (ED) or ICU.

Methods: We performed a secondary analysis of data from 2 multicenter randomized trials in critically ill adults undergoing tracheal intubation in an ED or ICU. Using a generalized linear mixed-effects model with prespecified baseline covariates, we examined the association between the neuromuscular blocking agent received (succinylcholine versus rocuronium) and the incidences of successful intubation on the first attempt (primary outcome) and severe complications during tracheal intubation (secondary outcome).

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Article Synopsis
  • The study aimed to assess how multiple attempts at emergency airway intubation in the emergency department (ED) increase the risk of complications.
  • An analysis of data from a multicenter registry showed that out of 15,079 intubation cases, complications occurred in 14% of patients, with hypoxia being the most common major issue.
  • The results indicated that the odds of major complications significantly increased with each additional intubation attempt, emphasizing the need for effective airway management strategies.
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Article Synopsis
  • * The study focused on creating a set of expert guidelines for managing difficult airways in critically ill adults, specifically those with physiologically challenging conditions like obesity and pregnancy.
  • * An international group of airway management specialists used the Delphi method, which involved multiple rounds of surveys, to achieve consensus on 53 out of 61 proposed statements regarding best practices.
  • * Key recommendations included forming a robust intubation team, using videolaryngoscopy, optimizing patient conditions before intubation, and carefully monitoring the patient's status post-intubation to improve overall outcomes.
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  • The study assessed the effectiveness of the updated 2023-2024 COVID-19 vaccine against hospitalization for two variant lineages, XBB and JN, in hospitalized patients across 26 hospitals in the U.S. between October 2023 and March 2024.
  • The results indicated a vaccine effectiveness (VE) of 54.2% against XBB and 32.7% against JN, suggesting that the JN lineage may have some level of immune escape.
  • However, the severity of cases with the JN lineage was not significantly worse compared to those with the XBB lineage, indicating similar risks of severe outcomes like ICU admission and death.
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  • In a study involving critically ill adults undergoing tracheal intubation, researchers compared preoxygenation methods: noninvasive ventilation versus oxygen mask.
  • The findings revealed that hypoxemia occurred significantly less in the noninvasive-ventilation group (9.1%) compared to the oxygen-mask group (18.5%).
  • Additionally, the incidence of cardiac arrest was lower with noninvasive ventilation (0.2%) compared to the oxygen-mask group (1.1%).
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The optimal timing of intubation in acute hypoxaemic respiratory failure is uncertain and became a point of controversy during the COVID-19 pandemic. Invasive mechanical ventilation is a potentially life-saving intervention but carries substantial risks, including injury to the lungs and diaphragm, pneumonia, intensive care unit-acquired muscle weakness, and haemodynamic impairment. In deciding when to intubate, clinicians must balance premature exposure to the risks of ventilation with the potential harms of unassisted breathing, including disease progression and worsening multiorgan failure.

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Background: For every critically ill adult receiving invasive mechanical ventilation, clinicians must select a mode of ventilation. The mode of ventilation determines whether the ventilator directly controls the tidal volume or the inspiratory pressure. Newer hybrid modes allow clinicians to set a target tidal volume; the ventilator controls and adjusts the inspiratory pressure.

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Importance: On June 21, 2023, the Centers for Disease Control and Prevention recommended the first respiratory syncytial virus (RSV) vaccines for adults aged 60 years and older using shared clinical decision-making. Understanding the severity of RSV disease in adults can help guide this clinical decision-making.

Objective: To describe disease severity among adults hospitalized with RSV and compare it with the severity of COVID-19 and influenza disease by vaccination status.

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Importance: Among critically ill adults, randomized trials have not found oxygenation targets to affect outcomes overall. Whether the effects of oxygenation targets differ based on an individual's characteristics is unknown.

Objective: To determine whether an individual's characteristics modify the effect of lower vs higher peripheral oxygenation-saturation (Spo2) targets on mortality.

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Article Synopsis
  • In September 2023, the CDC recommended the updated 2023-2024 monovalent XBB.1.5 COVID-19 vaccine for everyone aged 6 months and older to help prevent COVID-19, including severe cases.
  • An analysis of vaccine effectiveness (VE) found that during the first 59 days after vaccination, the VE against COVID-19-related emergency department visits was 51%, which dropped to 39% after 60-119 days.
  • The updated COVID-19 vaccine showed increased protection, with VE against hospitalizations being 52% and 43% between two networks, supporting CDC's guidelines for vaccination.
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  • Venoarterial extracorporeal membrane oxygenation (VA-ECMO) is used for support during lung transplants, but the ideal level of anticoagulation needed to balance thromboembolism risk and bleeding is not established.
  • A study analyzed 163 patients, categorizing anticoagulation intensity into four levels based on heparin doses, to evaluate blood transfusion rates and thromboembolism occurrences.
  • Results indicated that higher anticoagulation intensity correlated with increased blood transfusions, while thromboembolism rates remained similar across all groups, suggesting that lower anticoagulation might be beneficial in reducing transfusions, but further research is required.
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Article Synopsis
  • * After 12 months, follow-up assessments of cognition and quality of life for 501 patients showed no differences among the oxygen target groups in overall cognitive function or related outcomes.
  • * Overall, the study indicates that for critically ill patients, the specific oxygen-saturation target set during ventilation does not influence long-term cognitive performance or quality of life measures.
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Supramolecular Cu(II) complexes were prepared from two trifunctional β-diketone ligands. The ligands (CHSi(phacH) and CHSi(phprH), represented by LH) contain three aryl-β-diketone moieties joined by an organosilicon group. The complexes have the empirical formula CuL, as expected for combinations of Cu and L.

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