Search

Your search keyword '"Émond, M."' showing total 245 results
Start Over Author "Émond, M."
245 results on '"Émond, M."'

1. The First High-Contrast Images of Near High-Mass X-Ray Binaries with Keck/NIRC2

Author

Prasow-Émond, M., Hlavacek-Larrondo, J., Fogarty, K., Artigau, É., Mawet, D., Gandhi, P., Steiner, J. F., Rameau, J., Lafrenière, D., Fabian, A. C., Walton, D. J., Doyon, R., and Ren, B. B.

Subjects
Astrophysics - Solar and Stellar Astrophysics, Astrophysics - Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

Although the study of X-ray binaries has led to major breakthroughs in high-energy astrophysics, their circumbinary environment at scales of $\sim$100--10,000 astronomical units has not been thoroughly investigated. In this paper, we undertake a novel and exploratory study by employing direct and high-contrast imaging techniques on a sample of X-ray binaries, using adaptive optics and the vortex coronagraph on Keck/NIRC2. High-contrast imaging opens up the possibility to search for exoplanets, brown dwarfs, circumbinary companion stars, and protoplanetary disks in these extreme systems. Here, we present the first near-infrared high-contrast images of 13 high-mass X-ray binaries located within $\sim$2--3 kpc. The key results of this campaign involve the discovery of several candidate circumbinary companions ranging from sub-stellar (brown dwarf) to stellar masses. By conducting an analysis based on galactic population models, we discriminate sources that are likely background/foreground stars and isolate those that have a high probability ($\gtrsim 60 - 99\%$) of being gravitationally bound to the X-ray binary. This publication seeks to establish a preliminary catalog for future analyses of proper motion and subsequent observations. With our preliminary results, we calculate the first estimate of the companion frequency and the multiplicity frequency for X-ray binaries: $\approx$0.6 and 1.8 $\pm$ 0.9 respectively, considering only the sources that are most likely bound to the X-ray binary. In addition to extending our comprehension of how brown dwarfs and stars can form and survive in such extreme systems, our study opens a new window to our understanding of the formation of X-ray binaries., Comment: 26 pages, 6 figures, accepted for publication in ApJ

Published
2024

2. The First High-Contrast Images of X-Ray Binaries: Detection of Candidate Companions in the $\gamma$ Cas Analog RX J1744.7$-$2713

Author

Prasow-Émond, M., Hlavacek-Larrondo, J., Fogarty, K., Rameau, J., Mawet, D., Guité, L. -S., Gandhi, P., Rao, A., Steiner, J., Artigau, É., Lafrenière, D., Fabian, A., Walton, D., Weiss, L., Doyon, R., Rhea, C. L., Bégin, T., Vigneron, B., and Naud, M. -E.

Subjects
Astrophysics - Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena
Abstract

X-ray binaries provide exceptional laboratories for understanding the physics of matter under the most extreme conditions. Until recently, there were few, if any, observational constraints on the circumbinary environments of X-ray binaries at $\sim$ 100-5000 AU scales; it remains unclear how the accretion onto the compact objects or the explosions giving rise to the compact objects interact with their immediate surroundings. Here, we present the first high-contrast adaptive optics images of X-ray binaries. These observations target all X-ray binaries within $\sim$ 3 kpc accessible with the Keck/NIRC2 vortex coronagraph. This paper focuses on one of the first key results from this campaign: our images reveal the presence of 21 sources potentially associated with the $\gamma$ Cassiopeiae analog high-mass X-ray binary RX J1744.7$-$2713. By conducting different analyses - a preliminary proper motion analysis, a color-magnitude diagram and a probability of chance alignment calculation - we found that three of these 21 sources have a high probability of being bound to the system. If confirmed, they would be in wide orbits ($\sim$ 450 AU to 2500 AU). While follow-up astrometric observations will be needed in $\sim$ 5-10 years to confirm further the bound nature of these detections, these discoveries emphasize that such observations may provide a major breakthrough in the field. In fact, they would be useful not only for our understanding of stellar multiplicity but also for our understanding of how planets, brown dwarfs and stars can form even in the most extreme environments., Comment: Accepted for publication in AJ

Published
2022
Full Text
View/download PDF

3. Extended radio emission in the galaxy cluster MS 0735.6+7421 detected with the Karl G. Jansky Very Large Array

Author

Bégin, T., Hlavacek-Larrondo, J., Rhea, C. L., Gendron-Marsolais, M., McNamara, B., van Weeren, R. J., Richard-Laferrière, A., Guité, L., Prasow-Émond, M., and Haggard, D.

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena
Abstract

MS 0735.6+7421 ($z = 0.216$) is a massive cool core galaxy cluster hosting one of the most powerful active galactic nuclei (AGN) outbursts known. The radio jets of the AGN have carved out an unusually large pair of X-ray cavities, each reaching a diameter of $200$ kpc. This makes MS 0735.6+7421 a unique case to investigate active galactic nuclei feedback processes, as well as other cluster astrophysics at radio wavelengths. We present new low-radio-frequency observations of MS 0735.6+7421 taken with the Karl G. Jansky Very Large Array (VLA): 5 hours of P-band ($224-480$ MHz) and 5 hours of L-band ($1-2$ GHz) observations, both in C configuration. Our VLA P-band ($224-480$ MHz) observations reveal the presence of a new diffuse radio component reaching a scale of $\sim$ $900$ kpc in the direction of the jets and of $\sim$ $500$ kpc in the direction perpendicular to the jets. This component is centered on the cluster core and has a radio power scaled at $1.4$ GHz of $P_{1.4\text{ GHz}} = (4\pm2)\times 10^{24}$ WHz$^{-1}$. Its properties are consistent with those expected from a radio mini-halo as seen in other massive cool core clusters, although it may also be associated with radio plasma that has diffused out of the X-ray cavities. Observations at higher spatial resolution are needed to fully characterize the properties and nature of this component. We also suggest that if radio mini-halos originate from jetted activity, we may be witnessing the early stages of this process., Comment: 11 pages, 7 figures, submitted to MNRAS

Published
2022
Full Text
View/download PDF

4. On the relation between mini-halos and AGN feedback in clusters of galaxies

Author

Richard-Laferrière, A., Hlavacek-Larrondo, J., Nemmen, R. S., Rhea, C. L., Taylor, G. B., Prasow-Émond, M., Gendron-Marsolais, M., Latulippe, M., Edge, A. C., Fabian, A. C., Sanders, J. S., Hogan, M. T., and Demontigny, G.

Subjects
Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena
Abstract

A variety of large-scale diffuse radio structures have been identified in many clusters with the advent of new state-of-the-art facilities in radio astronomy. Among these diffuse radio structures, radio mini-halos are found in the central regions of cool core clusters. Their origin is still unknown and they are challenging to discover; less than thirty have been published to date. Based on new VLA observations, we confirmed the mini-halo in the massive strong cool core cluster PKS 0745$-$191 ($z=0.1028$) and discovered one in the massive cool core cluster MACS J1447.4+0827 ($z=0.3755$). Furthermore, using a detailed analysis of all known mini-halos, we explore the relation between mini-halos and AGN feedback processes from the central galaxy. We find evidence of strong, previously unknown correlations between mini-halo radio power and X-ray cavity power, and between mini-halo and the central galaxy radio power related to the relativistic jets when spectrally decomposing the AGN radio emission into a component for past outbursts and one for on-going accretion. Overall, our study indicates that mini-halos are directly connected to the central AGN in clusters, following previous suppositions. We hypothesize that AGN feedback may be one of the dominant mechanisms giving rise to mini-halos by injecting energy into the intra-cluster medium and reaccelerating an old population of particles, while sloshing motion may drive the overall shape of mini-halos inside cold fronts. AGN feedback may therefore not only play a vital role in offsetting cooling in cool core clusters, but may also play a fundamental role in re-energizing non-thermal particles in clusters., Comment: 26 pages, 9 figures, 8 tables, accepted for publication in MNRAS

Published
2020
Full Text
View/download PDF

5. A Multiwavelength Study of the Massive Cool Core Cluster MACS J1447.4+0827

Author

Prasow-Émond, M., Hlavacek-Larrondo, J., Rhea, C. L., Latulippe, M., Gendron-Marsolais, M. -L., Richard-Laferrière, A., Sanders, J. S., Edge, A. C., Allen, S. W., Mantz, A., and von der Linden, A.

Subjects
Astrophysics - Astrophysics of Galaxies
Abstract

Clusters of galaxies are outstanding laboratories for understanding the physics of supermassive black hole feedback. Here, we present the first \textit{Chandra}, Karl G. Janksy Very Large Array and \textit{Hubble Space Telescope} analysis of MACS J1447.4+0827 ($z = 0.3755$), one of the strongest cool core clusters known, in which extreme feedback from its central supermassive black hole is needed to prevent the hot intracluster gas from cooling. Using this multiwavelength approach, including 70 ks of \textit{Chandra} X-ray observations, we detect the presence of collimated jetted-outflows that coincides with a southern and a northern X-ray cavity. The total mechanical power associated with these outflows ($P_{\mathrm{cav}} \approx 6 \times 10^{44}$ erg s$^{-1}$) is roughly consistent with the energy required to prevent catastrophic cooling of the hot intracluster gas ($L_{\mathrm{cool}} = 1.71 \pm 0.01 \times 10^{45}$ erg s$^{-1}$ for t$_\mathrm{cool}$ = 7.7 Gyrs); implying that powerful supermassive black hole feedback has been in place several Giga-years ago in MACS J1447.7+0827. In addition, we detect the presence of a radio mini-halo that extends over 300 kpc in diameter ($P_{1.4 \mathrm{GHz}} = 3.0 \pm 0.3 \times 10^{24}$ W Hz$^{-1}$). The X-ray observations also reveal a $\sim20$ kpc plume-like structure that coincides with optical dusty filaments that surround the central galaxy. Overall, this study demonstrates that the various physical phenomena occurring in the most nearby clusters of galaxies are also occurring in their more distant analogues., Comment: 19 pages, 15 figures, 5 tables, resubmitted to ApJ (minor corrections)

Published
2020
Full Text
View/download PDF

6. The First High-contrast Images of Near High-mass X-Ray Binaries with Keck/NIRC2

Author

Prasow-Émond, M., primary, Hlavacek-Larrondo, J., additional, Fogarty, K., additional, Artigau, É., additional, Mawet, D., additional, Gandhi, P., additional, Steiner, J. F., additional, Rameau, J., additional, Lafrenière, D., additional, Fabian, A., additional, Walton, D. J., additional, Doyon, R., additional, and Ren 任, B. B. 彬, additional

Published
2024
Full Text
View/download PDF

7. Opioid Poisoning and Opioid Use Disorder in Older Trauma Patients

Author

Daoust R, Paquet J, Moore L, Cournoyer A, Émond M, Gosselin S, Lavigne GJ, Boulanger A, Mac-Thiong JM, and Chauny JM

Subjects
prescription opioids, opioid poisoning, opioid use disorder, trauma, older adults, Geriatrics, RC952-954.6
Abstract

Raoul Daoust,1,2 Jean Paquet,1 Lynne Moore,3,4 Alexis Cournoyer,1,2 Marcel Émond,5 Sophie Gosselin,6,7 Gilles J Lavigne,8,9 Aline Boulanger,10,11 Jean-Marc Mac-Thiong,2,12 Jean-Marc Chauny1,2 1Centre d’Étude en Médecine d’Urgence, Hôpital du Sacré-Coeur de Montréal, Montréal, Quebec, Canada; 2Département Médecine Familiale et Médecine d’Urgence, Faculté de Médecine, Université de Montréal, Montréal, Quebec, Canada; 3Département de médecine sociale et préventive, Faculté de médecine, Université Laval, Quebec, Quebec, Canada; 4Axe de recherche en traumatologie-urgence-soins intensifs du Centre de recherche FRQS du CHU-Québec, Quebec, Quebec, Canada; 5Département de médecine familiale et de médecine d’urgence, Faculté DE médecine, Université Laval, Quebec, Quebec, Canada; 6Department of Emergency Medicine, McGill University Health Centre, McGill University, Montréal, Quebec, Canada; 7Département de médecine d’urgence, CISSS-Montérégie-Centre, Greenfield Park, Québec, Canada; 8Faculties of Dental Medicine and Medicine, Université de Montréal, Montréal, Quebec, Canada; 9Center for Advanced Research in Sleep Medicine, Hôpital du Sacré-Coeur de Montréal (CIUSSS du Nord de-l’Île-de-Montréal), Montréal, Quebec, Canada; 10Centre de recherche du Centre Hospitalier de l’Université de Montréal (CRCHUM), Montréal, Quebec, Canada; 11Département d’anesthésiologie, Faculté de médecine, Université de Montréal, Montréal, Quebec, Canada; 12Research Centre, Hôpital du Sacré-Coeur (CIUSSS du Nord de-l’île-de-Montréal), Montréal, Quebec, CanadaCorrespondence: Raoul Daoust Email raoul.daoust@videotron.caBackground: Patients hospitalized following a traumatic injury will be frequently treated with opioids during their stay and after discharge. We examined the relationship between acute phase (< 3 months) opioid use after discharge and the risk of opioid poisoning or use disorder in older trauma patients.Methods: In a retrospective multicenter cohort study conducted on registry data, we included all patients ≥ 65 years admitted (hospital stay > 2 days) for injury in 57 trauma centers in the province of Quebec (Canada) between 2004 and 2014. We searched for opioid poisoning and opioid use disorder from ICD-9 to ICD-10 code diagnosis after their initial injury. Patients that filled an opioid prescription within a 3-month period after sustaining the trauma were compared to those who did not, using Cox proportional hazards regressions.Results: A total of 70,314 admissions were retained for analysis; median age was 82 years (IQR: 75– 87), 68% were women, and 34% of the patients filled an opioid prescription within 3 months of the initial trauma. During a median follow-up of 2.6 years (IQR: 1– 5), 192 participants (0.27%; 95% CI: 0.23%-0.31%) were hospitalized for opioid poisoning and 73 (0.10%; 95% CI: 0.08%-0.13%) were diagnosed with opioid use disorder. Having filled an opioid prescription within 3 months of injury was associated with an increased hazard ratio of opioid poisoning (2.8; 95% CI: 2.1– 3.8) and opioid use disorder (4.2; 95% CI: 2.4– 7.4) after the injury. However, history of opioid poisoning (2.6; 95% CI: 1.1– 5.8), of substance use disorder (4.3; 95% CI: 2.4– 7.7), or of the opioid prescription filled (2.8; 95% CI: 2.2– 3.6) before the trauma, was also related to opioid poisoning or opioid use disorder after the injury.Conclusion: Opioid poisoning and opioid use disorder are rare events after hospitalization for trauma in older patients. However, opioids should be used cautiously in patients with a history of substance use disorder, opioid poisoning or opioid use.Keywords: prescription opioids, opioid poisoning, opioid use disorder, trauma, injury, older adults

Published
2020

9. The First High-contrast Images of X-Ray Binaries: Detection of Candidate Companions in the γ Cas Analog RX J1744.7-2713

Author

Prasow-Émond, M, Hlavacek-Larrondo, J, Fogarty, K, Rameau, J, Guité, L-S, Mawet, D, Gandhi, P, Rao, A, Steiner, JF, Artigau, É, Lafrenière, D, Fabian, AC, Walton, DJ, Weiss, LM, Doyon, R, Ren 任彬, BB, Rhea, CL, Bégin, T, Vigneron, B, Naud, M-E, Prasow-Émond, M [0000-0002-2457-3431], Hlavacek-Larrondo, J [0000-0001-7271-7340], Fogarty, K [0000-0002-2691-2476], Rameau, J [0000-0003-0029-0258], Guité, L-S [0000-0002-8323-7809], Mawet, D [0000-0002-8895-4735], Gandhi, P [0000-0003-3105-2615], Steiner, JF [0000-0002-5872-6061], Artigau, É [0000-0003-3506-5667], Lafrenière, D [0000-0002-6780-4252], Fabian, AC [0000-0002-9378-4072], Walton, DJ [0000-0001-5819-3552], Weiss, LM [0000-0002-3725-3058], Doyon, R [0000-0001-5485-4675], Ren 任彬, BB [0000-0003-1698-9696], Rhea, CL [0000-0003-2001-1076], Bégin, T [0000-0002-5837-8618], Vigneron, B [0000-0002-2478-5119], Naud, M-E [0000-0003-1807-1598], and Apollo - University of Cambridge Repository

Subjects
astro-ph.HE, Science & Technology, STAR, MULTIPLICITY, Astronomy and Astrophysics, PLANET, PULSAR, Astronomy & Astrophysics, CASSIOPEIAE, BROWN DWARF, STELLAR, Space and Planetary Science, SYSTEMS, 5101 Astronomical Sciences, DISCOVERY, Physical Sciences, astro-ph.EP, 0201 Astronomical and Space Sciences, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, 51 Physical Sciences, GALACTIC-CENTER, Astrophysics - Earth and Planetary Astrophysics
Abstract

X-ray binaries provide exceptional laboratories for understanding the physics of matter under the most extreme conditions. Until recently, there were few, if any, observational constraints on the circumbinary environments of X-ray binaries at $\sim$ 100-5000 AU scales; it remains unclear how the accretion onto the compact objects or the explosions giving rise to the compact objects interact with their immediate surroundings. Here, we present the first high-contrast adaptive optics images of X-ray binaries. These observations target all X-ray binaries within $\sim$ 3 kpc accessible with the Keck/NIRC2 vortex coronagraph. This paper focuses on one of the first key results from this campaign: our images reveal the presence of 21 sources potentially associated with the $\gamma$ Cassiopeiae analog high-mass X-ray binary RX J1744.7$-$2713. By conducting different analyses - a preliminary proper motion analysis, a color-magnitude diagram and a probability of chance alignment calculation - we found that three of these 21 sources have a high probability of being bound to the system. If confirmed, they would be in wide orbits ($\sim$ 450 AU to 2500 AU). While follow-up astrometric observations will be needed in $\sim$ 5-10 years to confirm further the bound nature of these detections, these discoveries emphasize that such observations may provide a major breakthrough in the field. In fact, they would be useful not only for our understanding of stellar multiplicity but also for our understanding of how planets, brown dwarfs and stars can form even in the most extreme environments., Comment: Accepted for publication in AJ

Published
2022

12. The First High-contrast Images of X-Ray Binaries: Detection of Candidate Companions in the γ Cas Analog RX J1744.7-2713

Author

Prasow-Émond, M., primary, Hlavacek-Larrondo, J., additional, Fogarty, K., additional, Rameau, J., additional, Guité, L.-S., additional, Mawet, D., additional, Gandhi, P., additional, Rao, A., additional, Steiner, J. F., additional, Artigau, É., additional, Lafrenière, D., additional, Fabian, A. C., additional, Walton, D. J., additional, Weiss, L. M., additional, Doyon, R., additional, Ren 任彬, B. B., additional, Rhea, C. L., additional, Bégin, T., additional, Vigneron, B., additional, and Naud, M.-E., additional

Published
2022
Full Text
View/download PDF

13. Extended radio emission in the galaxy cluster MS 0735.6+7421 detected with the Karl G. Jansky Very Large Array.

Author

Bégin, T, Hlavacek-Larrondo, J, Rhea, C L, Gendron-Marsolais, M, McNamara, B, van Weeren, R J, Richard-Laferrière, A, Guité, L, Prasow-Émond, M, and Haggard, D

Subjects
GALAXY clusters, RADIO galaxies, RADIO jets (Astrophysics), ACTIVE galactic nuclei, ASTROPHYSICAL jets, ASTROPHYSICS
Abstract

MS 0735.6+7421 (z = 0.216) is a massive cool core galaxy cluster hosting one of the most powerful active galactic nuclei (AGNs) outbursts known. The radio jets of the AGN have carved out an unusually large pair of X-ray cavities, each reaching a diameter of 200 kpc. This makes MS 0735.6+7421 a unique case to investigate active galactic nuclei feedback processes, as well as other cluster astrophysics at radio wavelengths. We present new low radiofrequency observations of MS 0735.6+7421 taken with the Karl G. Jansky Very Large Array (VLA): 5 h of P -band (224–480 MHz) and 5 h of L -band (1–2 GHz) observations, both in C configuration. Our VLA P -band (224–480 MHz) observations reveal the presence of a diffuse radio component reaching a scale of ≈ 900 kpc in the direction of the jets and of ≈ 500 kpc in the direction perpendicular to the jets. This component is centred on the cluster core and has a radio power scaled at 1.4 GHz of P 1.4GHz = (4 ± 2) × 1024 W Hz−1. Its properties are consistent with those expected from a radio minihalo as seen in other massive cool core clusters, although it may also be associated with radio plasma that has diffused out of the X-ray cavities, or to a combination of these two hypotheses. Observations at higher spatial resolution are needed to fully characterize the properties and nature of this component. We also suggest that if radio minihaloes originate from jetted activity, we may be witnessing the early stages of this process. [ABSTRACT FROM AUTHOR]

Published
2023
Full Text
View/download PDF

14. On the relation between mini-halos and AGN feedback in clusters of galaxies

Author

Richard-Laferrière, A, primary, Hlavacek-Larrondo, J, additional, Nemmen, R S, additional, Rhea, C L, additional, Taylor, G B, additional, Prasow-Émond, M, additional, Gendron-Marsolais, M, additional, Latulippe, M, additional, Edge, A C, additional, Fabian, A C, additional, Sanders, J S, additional, Hogan, M T, additional, and Demontigny, G, additional

Published
2020
Full Text
View/download PDF

15. A Multiwavelength Study of the Cool Core Cluster MACS J1447.4+0827

Author

Prasow-Émond, M., primary, Hlavacek-Larrondo, J., additional, Rhea, C. L., additional, Latulippe, M., additional, Gendron-Marsolais, M.-L., additional, Richard-Laferrière, A., additional, Sanders, J. S., additional, Edge, A. C., additional, Allen, S. W., additional, Mantz, A., additional, and Linden, A. von der, additional

Published
2020
Full Text
View/download PDF

16. LO88: S100B serum protein level for the detection of clinically significant intracranial hemorrhage in patients with mild traumatic brain injury: a prospective cohort study

Author

Blais-L'Écuyer, J., primary, Blais-L'Écuyer, J., additional, Mercier, É., additional, Tardif, P., additional, Archambault, P., additional, Chauny, J., additional, Berthelot, S., additional, Frenette, J., additional, Perry, J., additional, Stiell, I., additional, Émond, M., additional, Lee, J., additional, Lang, E., additional, McRae, A., additional, Boucher, V., additional, and Le Sage, N., additional

Published
2020
Full Text
View/download PDF

18. LO86: Lack of association between four biomarkers and the presence of persistent post-concussion symptoms after a mild traumatic brain injury

Author

Le Sage, N., primary, Le Sage, N., additional, Frenette, J., additional, Chauny, J., additional, Berthelot, S., additional, Archambault, P., additional, Perry, J., additional, Lee, J., additional, Lang, E., additional, McRae, A., additional, Neveu, X., additional, Tardif, P., additional, Boucher, V., additional, Mercier, É., additional, and Émond, M., additional

Published
2020
Full Text
View/download PDF

19. LO87: Influence of co-injuries on post-concussion symptoms after a mild traumatic brain injury

Author

Ouellet, V., primary, Boucher, V., additional, Beauchamp, F., additional, Neveu, X., additional, Archambault, P., additional, Berthelot, S., additional, Chauny, J., additional, de Guise, E., additional, Émond, M., additional, Frenette, J., additional, Lang, E., additional, Lee, J., additional, Mercier, É., additional, Moore, L., additional, Ouellet, M., additional, Perry, J., additional, and Le Sage, N., additional

Published
2020
Full Text
View/download PDF

23. LO89: Describing the evolution of post-concussion symptoms after sports-related mTBI

Author

Beauchamp, F., primary, Boucher, V., additional, Neveu, X., additional, Ouellet, V., additional, Archambault, P., additional, Berthelot, S., additional, Chauny, J., additional, de Guise, E., additional, Émond, M., additional, Frenette, J., additional, Lang, E., additional, Lee, J., additional, Mercier, É., additional, Moore, L., additional, Ouellet, M., additional, Perry, J., additional, and Le Sage, N., additional

Published
2020
Full Text
View/download PDF

25. INTRODUCTION

Author

Muscedere, John, Bebenek, Sarah Grace, Stockley, Denise, Kinderman, Laura, Barrie, Carol, Salim, S., Warkentin, L., Gallivan, A., Churchill, T., Baracos, V., Khadaroo, R., McCullough, J., Keller, H., Vesnaver, E., Marcus, H., Lister, T., Nasser, R., Belley, L., Laur, C., Gainer, R., Moorhouse, P., Mallery, L., Hirsch, G., Hamilton, G., Wheeler, K., Di Michelle, J., Lalu, M.M, McIsaac, D. I, Mallery, K., Theou, O., Goldstein, J., Armstrong, J., Webb, J., Greene, J., Doyle, E., Douglas, B., Lee, J., Rockwood, K., Whitty, R., Koo, E., Porter, S., Battu, K., Kalocsai, C., Reid, J., Kho, M., Molloy, A., Herridge, M. S, Karachi, T., Fox-Robichaud, A., Koo, K. KY, Lo, V., Mathur, S., McCaughan, M., Pellizzari, J., Rudkowski, J., Figueiredo, S., Morais, J., Mayo, N., Meffen, K., Penner, C., Meyyappan, R., Sandoval, R., Broderick, J., Hoffer, A., Chambers, S., Ball, I., Martin, C., Awan, S., Rajji, T., Uranis, C., Kim, D., Burhan, A., Ting, R., Ito, H., Graff, A., Gerretsen, P., Woo, V., Mulsant, B., Davies, S., Paul, L. Read, Spice, R., Sinnarajah, A., Ho, G., Webb, M., Uniacke, J., Linsey, J., Kettle, J., Salmon, C., Mohammed, R., Whitby, C., Cowie, B., Wang, S., Sawatzky, R., Chan, E., Wolfs, D., Harding, W., Laforest, E., Schick-Makaroff, K., King, G., Cohen, S. R., Neufeld, C., Lett, J., Voth, J., Durepos, P., Wickson-Griffiths, A., Hazzan, A. Abiola, Kaasalainen, S., Vastis, V., Battistella, L., Papaioannou, A., Asselin, G., Klein, D., Tan, A., Kendell, C., Burge, F., Kotecha, J., Marshall, E., Cash, C., Tschupruk, C., Urquhart, R., Cottrell, L., Erbacker, L., Pesut, B., Duggleby, W., Bui, M., Te, A., Brazil, E., Sussman, T., Team, SPA-LTC, Delicaet, K., MacDonald, J., Hartwick, M., des Ordons, A. Roze, Myers, J., Pereira, J., Simon, J., Abdul-Razzak, A., Sharma, A., Ogilvie, L., Downar, J., Choukou, M.A., Holroyd-Leduc, J. M., Kazanjian, A., Durand, P. J, Straus, S. E, Légaré, F., Turgeon, A. F., Tourigny, A., Dumont, S., Mc Giguere, A., Lounsbury, K., Friesen, D., Bitschy, A., Donald, E. E, Stajduhar, K., Knapp, A., Klinger, C., Wentlandt, K., Urowitz, S., Walton, T., Chahal, M., Zwicker, V., Cohen, T., Morales, M. López, Miller, K., Duggan, K., Barnett-Cowan, M., Kortes-Miller, K., Kelley, M. Lou, Nayfeh, A., Marcoux, I., Jutai, J., Virag, O., Khakoo, A., Incardona, N., Workentin, K., Maxwell, C., Stock, K., Hogan, D. B., Tyas, S. L., Bronskill, S. E., Morris, A. M., Bell, C. M., Jeffs, L., Gandhi, S., Blain, J., Toubasi, S., Andrew, M., Ashe, M., Atkinson, E., Ayala, A. P., Bergman, H., Ploeg, J., McGilton, K., Patten, S. B., Maxwell, C. J., Delleman, B., Chan, D., Siu, H., Howard, M., Mangin, D., Akioyamen, L., Hoben, M., Estabrooks, C., McArthur, C., Gibbs, J. C., Patel, R., Neves, P., Killingbeck, J., Hirdes, J., Milligan, J., Berg, K., Giangreogrio, L., Adekpedjou, R., Stacey, D., Brière, N., Freitas, A., Marjolein, M., Garvelink, Turcotte, S., Heyer, M., Boscart, V., Heckman, G., Zahradnik, M., Jeffs, L. P., Mainville, C., Maione, M., Morris, A., Bell, C., Bronskill, S., Tscheng, D., Sever, L., Hyland, S., Emond, J., Garvelink, M., Menear, M., MacLeod, T., LeBlanc, C., Allen, M., McLean-Veysey, P., Rodney-Cail, N., Steeves, B., Bezanson, E., Van Ooteghem, K., Trinh, A., Cowan, D., Kwok, L., Fels, D., Meza, M., Fels-Leung, S., Ouellette-Kuntz, H., McKenzie, K., Martin, L., Bark, D., Hanafi, S., Gibson, W., Wagg, A., Tanel, M., Laing, A., Weaver, T., Lupo, J., Giangregorio, L., Payne, A., Sheets, D., Beach, C., Elliott, J., Stolee, P., Stinchcombe, A., Bédard, M., Enright, J., Wilson, K., Ozen, L., Silman, J., Gibbons, C., McKinnon, T., Timble, J., Willison, K., Boland, L., Perez, M. Margarita Becerra, McIsaac, D., Edmond, J., Brown, K., Leigh, J. Parsons, Buchner, D., Stelfox, H. T., Aziz, J., Crake, D., Ren, Z., Grant, T., Goubran, R., Knoefel, F., Sveistrup, H., Bilodeau, M., Oliver, J., Chidwick, P., Booi, L., Magyar, T., Martin, M., Ko, J. Hyun, Shannon, J., Wilson-Pease, E., Kephart, G., Babin, N., Malik, H., Maximos, M., Seng, S., Vandenberg, G., Dal Bello-Haas, V., Lagrotteria, A., Sullivan, K., Mihaylova, A., Lu, C., Koh, J., Hamielec, C., Steer, M., Jimenez, C., Woo, K., Julian, P., Martin, L. Schindel, McLelland, V., Ryan, D., Wilding, L., Chang, C. E., van Schooten, K. S, Wong, F., Robinovitch, S. N, Balasubramanaiam, B., Chenkin, J., Snider, T. G., Melady, D., Lee, J. S., Petrella, A., Heath, M., Shellington, E., Laguë, A., Voyer, P., Ouellet, M., Boucher, V., Pelletier, M., Gouin, É., Daoust, R., Berthelot, S., Giroux, M., Sirois, M., Émond, M., Bergstrom, V., Tate, K., Lee, S., Reid, C., Rowe, B., Cummings, G., Holroyd-Leduc, J., El-Bialy, R., Zhao, B., Baumbusch, J., Busson, C., Kohr, R., Donovan, J., Philpott, K., Kingston, J., Rickards, T., Weiler, C., Lanovaz, J., Arnold, C., Chiu, K., Cuperfain, A., Zhu, K., Zhao, X., Zhao, S., Iaboni, A., Perrella, A., Chau, V., Hu, C. Dong, Farooqi, M., Patel, S., Bauer, J., Lee, L., Schill, C., Patel, T., Mroz, L., Kryworuchko, J., Carter, R., Spencer, L., Barwich, D., Roy, N., Després, C., Leyenaar, M., McLeod, B., Poss, J., Costa, A., Blums, J., Costa, I. Geraldina, Tregunno, D., Kirkham, J., Seitz, D., Velkers, C., Krawczyk, M., Garland, E., Michaud, M., Pakzad, S., Bourque, P. E., Eamer, G., Gibson, J. A, Gillis, C., Hsu, A. T, MacDonald, E., Whitlock, R., Khadaroo, R. G, Brisebois, R., Clement, F., Hathaway, J., Bagheri, Z. S., Costa, I. G., Schinkel-Ivy, A., Rodney, P. (Paddy), Varcoe, C., Jiwani, B., Fenton, T., Gramlich, L., Tangri, N., Eng, F., Bohm, C., Komenda, P., Rigatto, C., Brar, R., McCloskey, R., Keeping-Burke, L., Donovan, C., Verma, A., Razak, F., Kwan, J., Lapointe-Shaw, L., Rawal, S., Tang, T., Weinerman, A., Guo, Y., Mamdani, M., McNicholl, T., Valaitis, R., Tarraf, R., Boakye, O., Suter, E., Boulanger, P., Birney, A., Sadowski, C. A, Gill, G., Mrklas, K., Plaisance, A., Noiseux, F., Francois, R., LeBlanc, A., McGinn, C. A., Tapp, D., Archambault, P. M., Begum, J., Wikjord, N., Roy, P., Reimer-Kirkham, S., Doane, G., Hilliard, N., Giesbrech, M., Dujela, C., Harerimana, B., Forchuk, C., Booth, R., Vasudev, A., Isaranuwatchai, W., Seth, P., Ramsey, D., Rudnick, A., Heisel, M., Reiss, J., Lee, E., Mate, K., Aubertin-Leheude, M., Fiore, J., Auais, M., Moriello, C., Scott, S., Wilson, M., McDonald, E., Lee, T., Arora, N., Hanvey, L., Elston, D., Heyland, R., Heyland, D., Langevin, J., Fang, Q., Price, D., Nowak, C., Fang, H., Richardson, J., Phillips, S., Gordon, C., Xie, F., Adachi, J., Tang, A., Swinton, M., Winhall, M., Clark, B., Sinuff, T., Abelson, J., You, J., Shears, M., Takaoka, A., Tina, M., Amanda, H., Surenthar, T., Li, G., Rochwerg, B., Woo, T., Bagshaw, S., Johnstone, J., Cook, D., Beaton, D., Drance, E., Leblanc, M.E., O’Connor, D., Ono, E., Phinney, A., Reid, R. C., Rodney, P. A., Tait, J., Ward-Griffin, C., Millen, T., Clarke, F., Thabane, L., Dogba, M. J., Rivest, L.l, Durand, P. J., Fraser, K., Bourassa, H., Embuldeniya, G., Farmanova, E., Auguste, D., Witteman, H. O, Kröger, E., Beaulieu, É., MC Giguere, A., Paragg, J., Swindle, J., Webber, T., Porterfield, P., Husband, A., Kryworucko, J., Trenaman, L., Bryan, S., Cuthbertson, L., Bansback, N., de Grood, C., Dodek, P., Fowler, R., Forster, A., Boyd, J., Stelfox, H., Kruger, S., Steinberg, M., Quinn, K., Yarnell, C., Fu, L., Manuel, D., Tanuseputro, P., Stukel, T., Pinto, R., Scales, D., Laupacis, A., Varughese, R., Huang, A., Famure, O., Chowdhury, N., Renner, E., Kim, J., MacIver, J., Singer, L., Gali, B., Brewster, P., Asche, C., Mitz, A., Hundza, S., MacDonald, S., Kaechele, N., Donald, E., Kaur, S., Fernandes, P., Pauloff, K., Gordon, A., Kallan, L., Grinman, M., Human, T., Ying, I., Pattullo, A., Wong, H., Feldman, S., Moffat, D., Zjadewicz, K., McIntosh, C. J., Alghamdi, M., McComb, A., Ferrone, A., Geng, W., Weeks-Levy, C., and Menon, C.

Subjects
Abstracts, Canadian Frailty Network Abstracts from the Meeting in Toronto, September 27–29, 2015, Canadian Frailty Network Abstracts from the Meeting Held in Toronto, April 23–24, 2017
Published
2017

35. LO70: Functional & cognitive decline in older delirious adults after an emergency department visit

Author

Giroux, M., primary, Sirois, M., additional, Nadeau, A., additional, Boucher, V., additional, Carmichael, P., additional, Voyer, P., additional, Pelletier, M., additional, Gouin, É., additional, Daoust, R., additional, Berthelot, S., additional, Lamontagne, M., additional, Morin, M., additional, Lemire, S., additional, and Émond, M., additional

Published
2019
Full Text
View/download PDF

37. Influence of concomitant injuries on post-concussion symptoms after a mild traumatic brain injury – a prospective multicentre cohort study.

Author

Ouellet, V, Boucher, V, Beauchamp, F, Neveu, X, Archambault, P, Berthelot, S, Chauny, JM, De Guise, E, Émond, M, Frenette, J, Lang, E, Lee, J, Mercier, Moore, L, Ouellet, MC, Perry, J, and Le Sage, N

Subjects
INJURY complications, RESEARCH, RELATIVE medical risk, CONFIDENCE intervals, MEDICAL cooperation, POSTCONCUSSION syndrome, DESCRIPTIVE statistics, QUESTIONNAIRES, BRAIN injuries, LONGITUDINAL method, DISEASE complications
Abstract

Objectives: To compare post-concussion symptoms (PCS) and return to normal activities between mild Traumatic Brain Injury (mTBI) patients with or without concomitant injuries at 7-and 90 days post-mTBI.Methods: Design: Sub-analysis of a multicentre prospective cohort study. Participants and setting: patients with mTBI from 7 Canadian Emergency Departments. Procedure: Research assistants conducted telephone follow-ups using the Rivermead Postconcussion Symptoms Questionnaire (RPQ) at 7-, 30- and 90 days post-mTBI. Main outcome: Presence of PCS (RPQ: ≥3 symptoms) at 90 days. Secondary outcomes: RPQ score ≥21, prevalence of individual RPQ symptoms and patients' return to normal activities, at 7- and 90-days. Adjusted risk ratios (RR) were calculated.Results: 1725 mTBI patients were included and 1055 (61.1%) had concomitant injuries. Patients with concomitant injuries were at higher risk of having ≥3 symptoms on the RPQ (RR:1.26 [95% CI 1.01–1.58]) at 90 days. They were also at higher risk of experiencing specific symptoms (dizziness, fatigue, headaches and taking longer to think) and of non-return to their normal activities (RR:2.11 [95% CI 1.30–3.45]).Conclusion: Patients with concomitant injuries have slightly more PCS and seemed to be at higher risk of non-return to their normal activities 90 days, compared to patients without concomitant injuries. [ABSTRACT FROM AUTHOR]

Published
2021
Full Text
View/download PDF

43. P017: A time-driven activity-based costing method to estimate health care costs in the emergency department

Author

Berthelot, S., primary, Mallet, M., additional, Baril, L., additional, Dupont, P., additional, Bissonnette, L., additional, Stelfox, H., additional, Émond, M., additional, Blais, S., additional, Vezo, A., additional, Létourneau, M., additional, Côté, S., additional, Bécotte, G., additional, Lafrenière, M., additional, and Moore, L., additional

Published
2017
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results