36 results match your criteria: "Hospital Maisonneuve-Rosemont[Affiliation]"

Performance of ChatGPT in French language analysis of multimodal retinal cases.

J Fr Ophtalmol

December 2024

Department of Ophthalmology and Vision Sciences, University of Toronto, Toronto, Ontario, Canada; Department of Ophthalmology, St. Michael's Hospital/Unity Health Toronto, Toronto, Ontario, Canada. Electronic address:

Purpose: Prior literature has suggested a reduced performance of large language models (LLMs) in non-English analyses, including Arabic and French. However, there are no current studies testing the multimodal performance of ChatGPT in French ophthalmology cases, and comparing this to the results observed in the English literature. We compared the performance of ChatGPT-4 in French and English on open-ended prompts using multimodal input data from retinal cases.

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Challenges of Hip and Knee Arthroplasty in Patients With Osteopetrosis.

J Am Acad Orthop Surg

October 2024

From the Department of Surgery, Hospital Maisonneuve-Rosemont, Montreal University, Montreal, QC, Canada (Dr. Beckers, Dr. Vendittoli, Dr. Morcos, and Dr. Massé), the Department of Surgery, CHU Sainte-Justine, Montréal, Quebec, Canada (Mazy), the Clinique Orthopédique Duval, Laval, QC, Canada (Vendittoli and Massé), and the Personalized Arthroplasty Society, Atlanta, GA (Vendittoli).

Article Synopsis
  • Osteopetrosis is a rare bone disease that leads to increased bone density due to malfunctioning osteoclasts, which makes bones more brittle and prone to fractures and deformities.
  • Joint problems, specifically hip and knee osteoarthritis, often develop as long-term complications in patients with osteopetrosis, making joint replacement surgery a common treatment for advanced cases.
  • However, performing joint arthroplasty in osteopetrosis patients carries a higher risk of complications, requiring careful preoperative and surgical planning to address the unique challenges posed by the disease.
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Over the years, with a better understanding of knee anatomy and biomechanics, superior implant designs, advanced surgical techniques, and the availability of precision tools such as robotics and navigation, a more personalized approach to total knee arthroplasty (TKA) has emerged. In the presence of extra-articular deformities, performing personalized TKA can be more challenging and specific considerations are required, since one has to deal with an acquired pathological anatomy. Performing personalized TKA surgery in patients with extra-articular deformities, the surgeon can: (1) resurface the joint, omitting the extra-articular deformity; (2) partially compensate the extra-articular deformity with intra-articular correction (hybrid technique), or (3) correct the extra-articular deformity combined with a joint resurfacing TKA (single stage or two-stage procedure).

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Environmental Factors Associated With Risk of Crohn's Disease Development in the Crohn's and Colitis Canada - Genetic, Environmental, Microbial Project.

Clin Gastroenterol Hepatol

September 2024

Zane Cohen Centre for Digestive Diseases, Mount Sinai Hospital, Toronto, Ontario, Canada; Division of Gastroenterology & Hepatology, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada. Electronic address:

Background & Aims: To date, it is unclear how environmental factors influence Crohn's disease (CD) risk and how they interact with biological processes. This study investigates the association between environmental exposures and CD risk and evaluates their association with pre-disease biomarkers.

Methods: We studied 4289 healthy first-degree relatives (FDRs) of patients with CD from the Crohn's and Colitis Canada - Genetic, Environmental, Microbial (CCC-GEM) project.

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Introduction: Cure Glomerulonephropathy (CureGN) is an observational cohort study of patients with minimal change disease (MCD), focal segmental glomerulosclerosis (FSGS), membranous nephropathy (MN), or IgA nephropathy. We developed a conventional, consensus-based scoring system to document pathologic features for application across multiple pathologists and herein describe the protocol, reproducibility, and correlation with clinical parameters at biopsy.

Methods: Definitions were established for glomerular, tubular, interstitial, and vascular lesions evaluated semiquantitatively using digitized light microscopy slides and electron micrographs, and reported immunofluorescence.

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Background: Harmonization in laboratory medicine is essential for consistent and accurate clinical decision-making. There is significant and unwarranted variation in reference intervals (RIs) used by laboratories for assays with established analytical traceability. The Canadian Society of Clinical Chemists (CSCC) Working Group on Reference Interval Harmonization (hRI-WG) aims to establish harmonized RIs (hRIs) for laboratory tests and support implementation.

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This guidance updates 2021 GRADE (Grading of Recommendations Assessment, Development and Evaluation) recommendations regarding immediate allergic reactions following coronavirus disease 2019 (COVID-19) vaccines and addresses revaccinating individuals with first-dose allergic reactions and allergy testing to determine revaccination outcomes. Recent meta-analyses assessed the incidence of severe allergic reactions to initial COVID-19 vaccination, risk of mRNA-COVID-19 revaccination after an initial reaction, and diagnostic accuracy of COVID-19 vaccine and vaccine excipient testing in predicting reactions. GRADE methods informed rating the certainty of evidence and strength of recommendations.

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Objectives: Monitoring quality indicators (QIs) is an important part of laboratory quality assurance (QA). Here, the Canadian Society of Clinical Chemists (CSCC) Point of Care Testing (POCT) and QI Special Interest Groups describe a process for establishing and monitoring QIs for POCT glucose testing.

Methods: Key, error prone steps in the POCT glucose testing process were collaboratively mapped out, followed by risk assessment for each step.

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Introduction: Approximately 33% of people who contracted COVID-19 still experience symptoms 12 weeks after infection onset. This persistence of symptoms is now considered a syndrome itself called 'long COVID'. Evidence regarding long COVID and its cognitive and physical impacts is growing, but the literature is currently lacking objectively measured data to guide towards adapted healthcare trajectories.

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Periodontal disease as a risk factor for sporadic colorectal cancer: results from COLDENT study.

Cancer Causes Control

March 2022

Faculty of Dental Medicine and Oral Health Sciences, McGill University, 2001 McGill College Avenue, Suite 500, Montreal, QC, H3A 1G1, Canada.

Colorectal cancer remains the top leading cancer worldwide. Accumulating evidence suggests periodontal pathogens are involved in colorectal carcinogenesis, indicating the need for high-quality epidemiological evidence linking periodontal disease (PD) and colorectal cancer (CRC). Thus, we conducted the first population-based case-control study that was specifically designed to investigate the association between compromised oral health and sporadic CRC.

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Anti-Inflammatory Role of Netrin-4 in Diabetic Retinopathy.

Int J Mol Sci

April 2021

Experimental Ophthalmology, Department of Ophthalmology, Charité-Universitätsmedizin Berlin, Freie Universität, Humboldt-University, The Berlin Institute of Health, Augustenburger Pl. 1, 13353 Berlin, Germany.

Diabetic retinopathy is characterized by dysfunction of the retinal vascular network, combined with a persistent low-grade inflammation that leads to vision-threatening complications. Netrin-4 (NTN4) is a laminin-related secreted protein and guidance cue molecule present in the vascular basal membrane and highly expressed in the retina. A number of studies inferred that the angiogenic abilities of NTN4 could contribute to stabilize vascular networks and modulate inflammation.

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Vitamin C-Induced Oxalate Nephropathy in a Septic Patient.

Crit Care Explor

April 2021

Department of Medicine, Division of Critical Care Medicine, Maisonneuve-Rosemont Hospital, Affiliated With University of Montreal, Montreal, QC, Canada.

Unlabelled: Vitamin C is a novel treatment currently under investigation in the management of sepsis. Adverse renal effects of vitamin C through hyperoxaluria have been described in the past.

Data Sources: We report the case of a 63-year-old man admitted in a community-based hospital with a diagnosis of sepsis of pulmonary origin.

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We report results of a phase-1 study evaluating the safety and anti-cancer activity of the small molecule insulin-like growth factor-1 receptor (IGF-1R) inhibitor, linsitinib combined with bortezomib, and dexamethasone in relapsed/refractory multiple myeloma. Nineteen patients were enrolled across four dose-escalation cohorts (75-150 mg bid). The maximum tolerated dose of linsitinib was 125 mg.

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The serine/threonine kinase, glycogen synthase kinase 3 (GSK-3) has been implicated in immune cell activation and function. Our recent studies have shown that the abrogation of GSK-3 activity down-regulates the expression of key inhibitory receptors PD-1 and LAG-3. It also regulates the expression of the transcription factor NFAT which, in turn, is responsible for inhibiting PD-1/LAG-3 transcription as well as activating the expression of cytolytic effector proteins such as perforin and granzyme B.

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In recent years, circadian rhythms have been observed in many aspects of the immune system, both for the innate immunity (the first line of defense against pathogens) and the adaptive immunity (a more specific set of responses, which lead to immune memory). Here, to illustrate principles to be taken into account when working on circadian rhythms in immunology experiments, two protocols will be presented. The first one aims to analyze immune parameters in blood sampled from human subjects at different times over the day: counts of different cell types among the peripheral blood mononuclear cells and cytokine secretion by monocytes and T cells after ex vivo stimulation.

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The purpose of this study is to describe the clinical and prognostic features and to evaluate the outcome of different therapeutic approaches among patients with blastic plasmacytoid dendritic cell neoplasm (BPDCN) who have been diagnosed and treated in different institutions. A total of 398 patients from 75 centers were included in the study. Treatment consisted of non-Hodgkin lymphoma (NHL)-like regimens in 129 (32.

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Purpose: Short stems were developed with the promise of providing easier implantation, facilitating revision, reducing thigh pain and proximal stress shielding. The aim of this study is to present the mid-term clinical results of a titanium short stem with modular neck.

Methods: This is a prospective case series of 144 THAs performed on a series of 131 patients using the PROFEMUR Preserve Femoral Stem (MicroPort Orthopedics, Arlington, TN, USA).

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Efficacy and safety of remifentanil in a rapid sequence induction in elderly patients: A three-arm parallel, double blind, randomised controlled trial.

Anaesth Crit Care Pain Med

April 2020

Department of anaesthesia intensive care pain and emergency, university hospital of Nîmes, place du Professeur Robert-Debré, 30029 Nîmes cedex 9, France; EA 2992, faculty of medicine, Montpellier-Nimes university I, 30900 Nîmes, France. Electronic address:

Background: Rapid sequence induction (RSI) is recommended in patients at risk of aspiration, but induced haemodynamic adverse events, including tachycardia. In elderly patients, this trial aimed to assess the impact of the addition of remifentanil during RSI on the occurrence of: tachycardia (primary outcome), hypertension (due to intubation) nor hypotension (remifentanil).

Methods: In this three-arm parallel, double blind, multicentre controlled study, elderly patients (65 to 90 years old) hospitalised in three centres and requiring RSI were randomly allocated to three groups, where anaesthesia was induced with etomidate (0.

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Donor lymphocyte infusion has been used in the management of relapsed hematologic malignancies after allogeneic hematopoietic cell transplantation. It can eradicate minimal residual disease or be used to rescue a hematologic relapse, being able to induce durable remissions in a subset of patients. With the increased use of haploidentical hematopoietic cell transplantation, there is renewed interest in the use of donor lymphocytes to either treat or prevent disease relapse post transplant.

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Quality indicators (QIs) are key tools for improving the quality of laboratory services, by reducing error rates and safeguarding patient safety. A body of accumulated evidence confirms the relevance of QIs and their impact on the overall quality of laboratory information. The consensus achieved on a list of "harmonized" QIs, along with the system used for data collection and reporting throughout an international benchmarking programme, has enabled achieving realistic performance targets, based on knowledge of the state-of-the-art.

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PRMT5 is essential for B cell development and germinal center dynamics.

Nat Commun

January 2019

Institut de Recherches Cliniques de Montréal, 110 av. des Pins Ouest, Montréal, QC, H2W 1R7, Canada.

Mechanisms regulating B cell development, activation, education in the germinal center (GC) and differentiation, underpin the humoral immune response. Protein arginine methyltransferase 5 (Prmt5), which catalyzes most symmetric dimethyl arginine protein modifications, is overexpressed in B cell lymphomas but its function in normal B cells is poorly defined. Here we show that Prmt5 is necessary for antibody responses and has essential but distinct functions in all proliferative B cell stages in mice.

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Introduction: In total hip arthroplasty (THA), local adverse reaction to metal debris (ARMD) may be caused by abnormal metal ion release from a metal-on-metal (MoM) bearing, or by wear and corrosion of the implant's modular junction. The aim of this study was to compare ion levels and rate of ARMD between patients sharing the same MoM bearing but 1 group having monoblock stems versus another having modular stems.

Materials And Methods: Whole blood cobalt (Co) and chromium (Cr) ion concentrations, ARMD rate, revision rate, and function measured by UCLA and WOMAC scores were compared between groups.

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Background: At present, selected patients with resectable colorectal peritoneal metastases (CRC-PM) are increasingly treated with a combination therapy of cytoreductive surgery (CRS) and hyperthermic intraperitoneal chemotherapy (HIPEC). The aim of this study was to investigate the current worldwide practice.

Methods: HIPEC experts from 19 countries were invited through the Peritoneal Surface Oncology Group International (PSOGI) to complete an online survey concerning their personal expertise and current hospital and countrywide practice.

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Two Strings in One Bow: PD-1 Negatively Regulates via Co-receptor CD28 on T Cells.

Immunity

April 2017

Division of Immunology-Oncology, Hospital Maisonneuve-Rosemont Research Center, Montreal, QC H1T 2M4, Canada; Department of Medicine, Université de Montréal, Montreal, QC H3C 3J7, Canada. Electronic address:

The identity of PD-1 dependency on other receptors and signaling has been unclear. In a recent issue of Science, Hui et al. (2017) and Kamphorst et al.

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