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  1. Article ; Online: The Undervalued Potential of Medical-Psychiatry Units to Improve Care for People With Severe Mental Illnesses.

    Wittink, Marsha / Chan, Aubrey C / Padrino, Susan / Silverstein, Steven M

    Psychiatric services (Washington, D.C.)

    2023  Volume 74, Issue 9, Page(s) 991–993

    MeSH term(s) Humans ; Mental Disorders/therapy ; Psychiatry
    Language English
    Publishing date 2023-02-23
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural
    ZDB-ID 1220173-x
    ISSN 1557-9700 ; 1075-2730
    ISSN (online) 1557-9700
    ISSN 1075-2730
    DOI 10.1176/appi.ps.202200039
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: High-dimensional conditionally Gaussian state space models with missing data

    Chan, Joshua C.C. / Poon, Aubrey / Zhu, Dan

    Journal of Econometrics. 2023 Sept., v. 236, no. 1 p.105468-

    2023  

    Abstract: We develop an efficient sampling approach for handling complex missing data patterns and a large number of missing observations in conditionally Gaussian state space models. Two important examples are dynamic factor models with unbalanced datasets and ... ...

    Abstract We develop an efficient sampling approach for handling complex missing data patterns and a large number of missing observations in conditionally Gaussian state space models. Two important examples are dynamic factor models with unbalanced datasets and large Bayesian VARs with variables in multiple frequencies. A key observation underlying the proposed approach is that the joint distribution of the missing data conditional on the observed data is Gaussian. Furthermore, the inverse covariance or precision matrix of this conditional distribution is sparse, and this special structure can be exploited to substantially speed up computations. We illustrate the methodology using two empirical applications. The first application combines quarterly, monthly and weekly data using a large Bayesian VAR to produce weekly GDP estimates. In the second application, we extract latent factors from unbalanced datasets involving over a hundred monthly variables via a dynamic factor model with stochastic volatility.
    Keywords Bayesian theory ; covariance ; data collection ; econometrics ; models ; C11 ; C32 ; C55 ; Mixed-frequency ; Unbalanced panel ; Vector autoregression ; Dynamic factor model ; Stochastic volatility
    Language English
    Dates of publication 2023-09
    Publishing place Elsevier B.V.
    Document type Article ; Online
    ZDB-ID 1460617-3
    ISSN 0304-4076
    ISSN 0304-4076
    DOI 10.1016/j.jeconom.2023.05.005
    Database NAL-Catalogue (AGRICOLA)

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  3. Article: Post-acquisition CO

    Taugher, Rebecca J / Wunsch, Amanda M / Wang, Grace Z / Chan, Aubrey C / Dlouhy, Brian J / Wemmie, John A

    Frontiers in behavioral neuroscience

    2021  Volume 15, Page(s) 767426

    Abstract: A growing body of evidence suggests that memories of fearful events may be altered after initial acquisition or learning. Although much of this work has been done in rodents using Pavlovian fear conditioning, it may have important implications for fear ... ...

    Abstract A growing body of evidence suggests that memories of fearful events may be altered after initial acquisition or learning. Although much of this work has been done in rodents using Pavlovian fear conditioning, it may have important implications for fear memories in humans such as in post-traumatic stress disorder (PTSD). A recent study suggested that cued fear memories, made labile by memory retrieval, were made additionally labile and thus more vulnerable to subsequent modification when mice inhaled 10% carbon dioxide (CO
    Language English
    Publishing date 2021-10-29
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2452960-6
    ISSN 1662-5153
    ISSN 1662-5153
    DOI 10.3389/fnbeh.2021.767426
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Efficacy of proning in acute respiratory distress syndrome on extracorporeal membrane oxygenation.

    Chang, Stephanie H / Smith, Deane E / Carillo, Julius A / Sommer, Philip M / Geraci, Travis C / Williams, David / Paone, Darien / Goldenberg, Ronald / Chan, Justin / Kon, Zachary N / Galloway, Aubrey C / Moazami, Nader

    JTCVS techniques

    2022  Volume 16, Page(s) 109–116

    Abstract: Objectives: Proning patients with acute respiratory distress syndrome (ARDS) has been associated with increased survival, although few data exist evaluating the safety and feasibility of proning patients with ARDS on extracorporeal membrane oxygenation ( ...

    Abstract Objectives: Proning patients with acute respiratory distress syndrome (ARDS) has been associated with increased survival, although few data exist evaluating the safety and feasibility of proning patients with ARDS on extracorporeal membrane oxygenation (ECMO).
    Methods: A single-institution retrospective review of all patients with ARDS placed on ECMO between March 1 and May 31, 2020, was performed. All proning events were evaluated for complications, as well as change in compliance, sweep, oxygenation, and flow. The primary outcome of this study was the rate major morbidity associated with proning while on ECMO.
    Results: In total, 30 patients were placed on ECMO for ARDS, with 12 patients (40%) proned while on ECMO. A total of 83 proning episodes occurred, with a median of 7 per patient (interquartile range, 3-9). No ECMO cannula-associated bleeding, cannula displacement, or endotracheal tune dislodgements occurred (0%). Oropharyngeal bleeding occurred twice (50%). Four patients were proned with chest tubes in place, and none had complications (0%). Lung compliance improved after proning in 70 events (84%), from a mean of 15.4 mL/mm Hg preproning to 20.6 mL/mm Hg postproning (
    Conclusions: Proning in patients with ARDS on ECMO is safe with an associated improvement in lung mechanics. With careful planning and coordination, these data support the practice of appropriately proning patients with severe ARDS, even if they are on ECMO.
    Language English
    Publishing date 2022-09-23
    Publishing country United States
    Document type Journal Article
    ISSN 2666-2507
    ISSN (online) 2666-2507
    DOI 10.1016/j.xjtc.2022.08.027
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Intoxicating effects of alcohol depend on acid-sensing ion channels.

    Harmata, Gail I S / Chan, Aubrey C / Merfeld, Madison J / Taugher-Hebl, Rebecca J / Harijan, Anjit K / Hardie, Jason B / Fan, Rong / Long, Jeffrey D / Wang, Grace Z / Dlouhy, Brian J / Bera, Amal K / Narayanan, Nandakumar S / Wemmie, John A

    Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology

    2022  Volume 48, Issue 5, Page(s) 806–815

    Abstract: Persons at risk for developing alcohol use disorder (AUD) differ in their sensitivity to acute alcohol intoxication. Alcohol effects are complex and thought to depend on multiple mechanisms. Here, we explored whether acid-sensing ion channels (ASICs) ... ...

    Abstract Persons at risk for developing alcohol use disorder (AUD) differ in their sensitivity to acute alcohol intoxication. Alcohol effects are complex and thought to depend on multiple mechanisms. Here, we explored whether acid-sensing ion channels (ASICs) might play a role. We tested ASIC function in transfected CHO cells and amygdala principal neurons, and found alcohol potentiated currents mediated by ASIC1A homomeric channels, but not ASIC1A/2 A heteromeric channels. Supporting a role for ASIC1A in the intoxicating effects of alcohol in vivo, we observed marked alcohol-induced changes on local field potentials in basolateral amygdala, which differed significantly in Asic1a
    MeSH term(s) Cricetinae ; Humans ; Mice ; Animals ; Acid Sensing Ion Channels/genetics ; Acid Sensing Ion Channels/pharmacology ; Cricetulus ; Neurons ; Electrophysiological Phenomena ; Ethanol/pharmacology
    Chemical Substances Acid Sensing Ion Channels ; Ethanol (3K9958V90M)
    Language English
    Publishing date 2022-10-15
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, N.I.H., Extramural ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 639471-1
    ISSN 1740-634X ; 0893-133X
    ISSN (online) 1740-634X
    ISSN 0893-133X
    DOI 10.1038/s41386-022-01473-4
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Failure to breathe persists without air hunger or alarm following amygdala seizures.

    Harmata, Gail Is / Rhone, Ariane E / Kovach, Christopher K / Kumar, Sukhbinder / Mowla, Md Rakibul / Sainju, Rup K / Nagahama, Yasunori / Oya, Hiroyuki / Gehlbach, Brian K / Ciliberto, Michael A / Mueller, Rashmi N / Kawasaki, Hiroto / Pattinson, Kyle Ts / Simonyan, Kristina / Davenport, Paul W / Howard, Matthew A / Steinschneider, Mitchell / Chan, Aubrey C / Richerson, George B /
    Wemmie, John A / Dlouhy, Brian J

    JCI insight

    2023  Volume 8, Issue 22

    Abstract: Postictal apnea is thought to be a major cause of sudden unexpected death in epilepsy (SUDEP). However, the mechanisms underlying postictal apnea are unknown. To understand causes of postictal apnea, we used a multimodal approach to study brain ... ...

    Abstract Postictal apnea is thought to be a major cause of sudden unexpected death in epilepsy (SUDEP). However, the mechanisms underlying postictal apnea are unknown. To understand causes of postictal apnea, we used a multimodal approach to study brain mechanisms of breathing control in 20 patients (ranging from pediatric to adult) undergoing intracranial electroencephalography for intractable epilepsy. Our results indicate that amygdala seizures can cause postictal apnea. Moreover, we identified a distinct region within the amygdala where electrical stimulation was sufficient to reproduce prolonged breathing loss persisting well beyond the end of stimulation. The persistent apnea was resistant to rising CO2 levels, and air hunger failed to occur, suggesting impaired CO2 chemosensitivity. Using es-fMRI, a potentially novel approach combining electrical stimulation with functional MRI, we found that amygdala stimulation altered blood oxygen level-dependent (BOLD) activity in the pons/medulla and ventral insula. Together, these findings suggest that seizure activity in a focal subregion of the amygdala is sufficient to suppress breathing and air hunger for prolonged periods of time in the postictal period, likely via brainstem and insula sites involved in chemosensation and interoception. They further provide insights into SUDEP, may help identify those at greatest risk, and may lead to treatments to prevent SUDEP.
    MeSH term(s) Adult ; Humans ; Child ; Apnea ; Sudden Unexpected Death in Epilepsy ; Carbon Dioxide ; Hunger ; Electroencephalography/methods ; Seizures ; Amygdala/diagnostic imaging
    Chemical Substances Carbon Dioxide (142M471B3J)
    Language English
    Publishing date 2023-11-22
    Publishing country United States
    Document type Journal Article
    ISSN 2379-3708
    ISSN (online) 2379-3708
    DOI 10.1172/jci.insight.172423
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Patient, Caregiver, and Clinician Participation in Prioritization of Research Questions in Pediatric Hospital Medicine.

    Gill, Peter J / Bayliss, Ann / Sozer, Aubrey / Buchanan, Francine / Breen-Reid, Karen / De Castris-Garcia, Kim / Green, Mairead / Quinlan, Michelle / Wong, Noel / Frappier, Shelley / Cowan, Katherine / Chan, Carol / Arafeh, Dana / Anwar, Mohammed Rashid / Macarthur, Colin / Parkin, Patricia C / Cohen, Eyal / Mahant, Sanjay

    JAMA network open

    2022  Volume 5, Issue 4, Page(s) e229085

    Abstract: Importance: The research agenda in pediatric hospital medicine has seldom considered the perspectives of young people, parents and caregivers, and health care professionals. Their perspectives may be useful in identifying questions on topics for ... ...

    Abstract Importance: The research agenda in pediatric hospital medicine has seldom considered the perspectives of young people, parents and caregivers, and health care professionals. Their perspectives may be useful in identifying questions on topics for research.
    Objective: To prioritize unanswered research questions in pediatric hospital medicine from the perspectives of young people, parents/caregivers, and health care professionals.
    Design, setting, and participants: Between August 4, 2020, and August 19, 2021, two online surveys and a virtual workshop were conducted, using modified Delphi technique and nominal group technique. Young people, parents/caregivers, and health care professionals with experiences in pediatric hospital medicine in Canada were included.
    Interventions: The established James Lind Alliance Priority Setting Partnership method was used. In phase 1, a survey collected unanswered questions regarding pediatric hospital medicine via 3 open-ended questions. Survey responses were used to develop summary questions that went through an evidence-checking process. Unanswered questions were brought to a phase 2 interim prioritization survey. The top 10 unanswered research questions in pediatric hospital medicine were established at the final priority setting workshop.
    Main outcomes and measures: Survey responses, top 10 research questions.
    Results: The phase 1 survey was completed by 188 participants (148 of 167 [89%] females; 17 of 167 [10%] males; mean [SD] age, 39.5 [12.4] years) and generated 495 unanswered research questions and comments, of which 58 were deemed out of scope. The remaining 437 responses were grouped into themes (eg, communication, shared decision-making, health service delivery, and health service management) and then refined to 75 unanswered research questions. Of these 75, only 4 questions had sufficient evidence. To make the number of questions in phase 2 manageable, 21 questions submitted by only 1 respondent were eliminated. Fifty unanswered research questions were included in the phase 2 survey, which was completed by 201 participants (165 of 186 [89%] females; 19 of 186 [10%] males; mean [SD] age, 40.0 [11.0] years). A short list of 16 questions-the top 10 questions from patient partners (youths, parents/caregivers) and clinicians-was presented at the final priority setting workshop and the top 10 questions were prioritized. The top 10 questions focused on the care of special inpatient populations (eg, children with medical complexity), communication, shared decision-making, support strategies in the hospital, mental health supports, shortening length of stay, and supporting Indigenous patients, parents/caregivers, and families.
    Conclusions and relevance: This patient-oriented pediatric hospital medicine priority setting partnership identified the most important unanswered research questions focused on the care of children in the hospital. These questions provide a possible roadmap for research on areas deemed important to young people, parents/caregivers, and clinicians.
    MeSH term(s) Adolescent ; Adult ; Caregivers ; Child ; Female ; Hospitals, Pediatric ; Humans ; Male ; Medicine ; Research Design ; Surveys and Questionnaires
    Language English
    Publishing date 2022-04-01
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 2574-3805
    ISSN (online) 2574-3805
    DOI 10.1001/jamanetworkopen.2022.9085
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Failure to breathe persists without air hunger or alarm following amygdala seizures

    Gail I.S. Harmata / Ariane E. Rhone / Christopher K. Kovach / Sukhbinder Kumar / Md Rakibul Mowla / Rup K. Sainju / Yasunori Nagahama / Hiroyuki Oya / Brian K. Gehlbach / Michael A. Ciliberto / Rashmi N. Mueller / Hiroto Kawasaki / Kyle T.S. Pattinson / Kristina Simonyan / Paul W. Davenport / Matthew A. Howard III / Mitchell Steinschneider / Aubrey C. Chan / George B. Richerson /
    John A. Wemmie / Brian J. Dlouhy

    JCI Insight, Vol 8, Iss

    2023  Volume 22

    Abstract: Postictal apnea is thought to be a major cause of sudden unexpected death in epilepsy (SUDEP). However, the mechanisms underlying postictal apnea are unknown. To understand causes of postictal apnea, we used a multimodal approach to study brain ... ...

    Abstract Postictal apnea is thought to be a major cause of sudden unexpected death in epilepsy (SUDEP). However, the mechanisms underlying postictal apnea are unknown. To understand causes of postictal apnea, we used a multimodal approach to study brain mechanisms of breathing control in 20 patients (ranging from pediatric to adult) undergoing intracranial electroencephalography for intractable epilepsy. Our results indicate that amygdala seizures can cause postictal apnea. Moreover, we identified a distinct region within the amygdala where electrical stimulation was sufficient to reproduce prolonged breathing loss persisting well beyond the end of stimulation. The persistent apnea was resistant to rising CO2 levels, and air hunger failed to occur, suggesting impaired CO2 chemosensitivity. Using es-fMRI, a potentially novel approach combining electrical stimulation with functional MRI, we found that amygdala stimulation altered blood oxygen level–dependent (BOLD) activity in the pons/medulla and ventral insula. Together, these findings suggest that seizure activity in a focal subregion of the amygdala is sufficient to suppress breathing and air hunger for prolonged periods of time in the postictal period, likely via brainstem and insula sites involved in chemosensation and interoception. They further provide insights into SUDEP, may help identify those at greatest risk, and may lead to treatments to prevent SUDEP.
    Keywords Neuroscience ; Medicine ; R
    Subject code 610
    Language English
    Publishing date 2023-11-01T00:00:00Z
    Publisher American Society for Clinical investigation
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Integrated Inpatient Medical and Psychiatric Care: Experiences of 5 Institutions.

    Chan, Aubrey C / Burke, Christopher A / Coffey, Ellen M / Hilden, David R / Coira, Diego L / Warner-Cohen, Jessy / Grady, Margaret / Muskin, Philip R / Shinozaki, Gen

    Annals of internal medicine

    2018  Volume 168, Issue 11, Page(s) 815–817

    MeSH term(s) Comorbidity ; Delivery of Health Care, Integrated/organization & administration ; Hospitalization ; Humans ; Mental Disorders/therapy ; Models, Organizational ; Patient Care Team ; United States
    Language English
    Publishing date 2018-04-24
    Publishing country United States
    Document type Journal Article ; Multicenter Study
    ZDB-ID 336-0
    ISSN 1539-3704 ; 0003-4819
    ISSN (online) 1539-3704
    ISSN 0003-4819
    DOI 10.7326/M17-3186
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Diagnostic Yield of FDG-PET/CT, MRI, and CSF Cytology in Non-Biopsiable Neurolymphomatosis as a Heralding Sign of Recurrent Non-Hodgkin's Lymphoma.

    Shaikh, Faiq / Chan, Aubrey C / Awan, Omer / Jerath, Nivedita / Reddy, Chandan / Khan, Salman A / Graham, Michael M

    Cureus

    2015  Volume 7, Issue 9, Page(s) e319

    Abstract: Neurolymphomatosis (NL) is a rare condition associated with lymphomas in which various structures of the nervous system are infiltrated by malignant lymphocytes. Rarely, it may be the presenting feature of recurrence of lymphoma otherwise deemed to be in ...

    Abstract Neurolymphomatosis (NL) is a rare condition associated with lymphomas in which various structures of the nervous system are infiltrated by malignant lymphocytes. Rarely, it may be the presenting feature of recurrence of lymphoma otherwise deemed to be in remission. It is crucial, as is the case with all types of nodal or visceral involvement of lymphoma, to identify the disease early and initiate treatment with chemotherapy and/or radiation therapy. Positron emission tomography-computed tomography (PET-CT) has been shown to be a sensitive modality for staging, restaging, biopsy guidance, therapy response assessment, and surveillance for recurrence of lymphoma. Magnetic resonance imaging (MRI) is another useful imaging modality, which, along with PET/CT, compliment cerebrospinal spinal fluid (CSF) cytology and electromyography (EMG) in the diagnosis of NL. Performing nerve biopsies to confirm neurolymphomatosis can be challenging and with associated morbidity. The case presented herein illustrates the practical usefulness of these tests in detecting NL as a heralding feature of lymphoma recurrence, especially in the absence of histopathologic correlation.
    Language English
    Publishing date 2015-09-09
    Publishing country United States
    Document type Case Reports
    ZDB-ID 2747273-5
    ISSN 2168-8184
    ISSN 2168-8184
    DOI 10.7759/cureus.319
    Database MEDical Literature Analysis and Retrieval System OnLINE

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