Publications by authors named "Anthony K C Chan"

Objectives: To report the long-term safety and efficacy of BAY 81-8973 in the LEOPOLD Kids extension phase.

Methods: Patients received BAY 81-8973 (25-50 IU/kg) at least twice weekly. The primary endpoint was safety, assessed in all patients who entered the extension phase (n = 82).

View Article and Find Full Text PDF

Introduction: The contemporary management of patients with colorectal cancer and synchronous liver metastases is complex. This study appraises the recommendations made by national/international guidelines for the diagnosis and management of patients with synchronous liver metastases from colorectal cancer.

Methods: A systematic review of national and international guidelines published between 2011 and 2024 was carried out using PubMed, OvidSP and Guidelines International Network databases.

View Article and Find Full Text PDF

Background: Concizumab is an anti-tissue factor pathway inhibitor monoclonal antibody in development as a once-daily, subcutaneous prophylaxis for patients with haemophilia A or haemophilia B with or without inhibitors. We aimed to assess the efficacy and safety of concizumab in patients with haemophilia A or B without inhibitors. Here we report the results from the confirmatory analysis cutoff.

View Article and Find Full Text PDF
Article Synopsis
  • Medical devices that contact blood can cause clotting and other complications, which is typically managed using anticoagulants and antiplatelet agents, though these can increase bleeding risks.
  • A new method investigates coating polydimethylsiloxane (PDMS) surfaces with an antithrombin-heparin complex and tissue plasminogen activator to inhibit clotting and dissolve early clots.
  • Different coating processes were tested, and the results showed that a specific sequential application of these agents improved their effectiveness and stability, suggesting potential for better blood compatibility in medical devices.
View Article and Find Full Text PDF
Article Synopsis
  • Researchers created a new anticoagulant complex called ATH, which outperforms traditional treatments combining antithrombin (AT) and heparin (H) in real-life scenarios.
  • Previous tests on ATH lacked endothelium, a layer of cells that influences blood clotting, so its effects with and without endothelium were studied.
  • The findings showed that while ATH had stronger inhibition of certain blood factors, endothelium presence slowed down the clotting process for both ATH and AT+H, suggesting ATH could be a promising anticoagulant for medical use.*
View Article and Find Full Text PDF
Article Synopsis
  • Once-weekly efanesoctocog alfa was tested in a phase 3 study for children under 12 with severe hemophilia A, showing promising results in preventing bleeding and maintaining factor VIII activity.
  • The study enrolled 74 patients, none of whom developed factor VIII inhibitors, and most experienced non-serious adverse events during the treatment.
  • With low annualized bleeding rates and a significant percentage of patients experiencing no bleeding episodes, efanesoctocog alfa demonstrated safety and effectiveness for this age group.
View Article and Find Full Text PDF

Background: Nonacog beta pegol (N9-GP) is an extended half-life PEGylated factor (F)IX product with established efficacy and short-term safety in persons with hemophilia B (HB). Long-term safety has been evaluated for polyethylene glycol exposure but not N9-GP.

Objectives: To assess safety, neurodevelopmental, and efficacy outcomes of children with HB receiving N9-GP prophylaxis across 2 open-label, single-arm, phase 3 studies: paradigm5 (previously treated patients [PTPs]) and paradigm6 (previously untreated patients [PUPs]) in this interim analysis.

View Article and Find Full Text PDF

The incidence of pediatric pulmonary embolism (PE) has increased by 200 % in the last decade, but at a single center, it is still infrequent. Given the unique epidemiologic features of pediatric PE, diagnosis is often delayed, and the management is empiric, based on individual physician experience or preference. Thus, there is a strong need for center-specific uniform management of pediatric PE patients.

View Article and Find Full Text PDF

Objective: To evaluate the accuracy of diagnostic algorithms developed using the International Classification of Diseases (ICD-9-CM and ICD-10-CA) diagnostic codes and physician billing codes for thromboembolism (TE) from health administrative data compared to chart review diagnoses of TE in children with cancer.

Methods: Using data linkage between the Pediatric Oncology Group of Ontario Network Information System (Ontario pediatric cancer registry) and various administrative data housed at ICES, eight algorithms were developed including a single reference to one of the billing codes, multiple references with varying time intervals, and combinations of various billing codes during primary cancer therapy for the whole cohort and, for early (<04/2002) and later (≥04/2002, solely ICD-10 codes) periods. Reference standard was chart review data from prior studies (from 1990 to 2016) among children (≤19 years) with cancer and radiologically confirmed TE.

View Article and Find Full Text PDF

Introduction: Damoctocog alfa pegol (BAY 94-9027, Jivi®) is an extended half-life recombinant factor (F)VIII replacement, indicated for the treatment of haemophilia A in patients aged ≥12 years. Following introduction of damoctocog alfa pegol in Canada in 2020, there have been no reports on routine clinical effectiveness and satisfaction, when switching from a previous FVIII product in Canada.

Aim: To report changes in pharmacokinetics, effectiveness, utilization and patient satisfaction when switching to damoctocog alfa pegol prophylaxis from previous standard half-life octocog alfa (BAY 81-8973, Kovaltry®) treatment.

View Article and Find Full Text PDF

Background: Pediatric pulmonary embolism (PE) is a rare event associated with significant morbidity and mortality. Awareness of clinical presentation and practices unique to children may aid clinicians in prompt identification and treatment.

Objectives: To describe the incidence, risk factors, clinical presentation, diagnostic and therapeutic practices, and short-term outcomes of pediatric PE.

View Article and Find Full Text PDF

Introduction: Simoctocog alfa (Nuwiq®) is a 4th generation recombinant FVIII with proven efficacy for the prevention and treatment of bleeding episodes (BEs) in previously treated patients with severe haemophilia A. The NuProtect study assessed the immunogenicity, efficacy and safety of simoctocog alfa in 108 previously untreated patients (PUPs). The incidence of high-titre inhibitors was 16.

View Article and Find Full Text PDF

Background: The NuProtect study reported data on the immunogenicity, efficacy and tolerability of simoctocog alfa (Nuwiq ) in 108 previously untreated patients with severe haemophilia A planned to be treated for ≥100 exposure days or up to 5 years. The NuProtect-Extension study collected long-term prophylaxis data in children with severe haemophilia A.

Methods: Patients who completed the NuProtect study according to the protocol were eligible for the NuProtect-Extension study, a prospective, multinational, non-controlled, Phase 3b study.

View Article and Find Full Text PDF

Background: Point of care ultrasonography (POCUS) is a non-ionizing imaging technique that is emerging in physiotherapy practice.

Objective: To systematically map the research literature on physiotherapist performed POCUS.

Data Sources: Following PRISMA-ScR guidelines, OVID Medline, CINAHL, AMED, and EMBASE were searched.

View Article and Find Full Text PDF

Objective: To explore the extent and type of pregnancy and lactation data of newly approved prescription drugs and assess whether the presented recommendations are data-driven, as required by the US Food and Drug Administration Pregnancy and Lactation Labeling Rule implemented in 2015.

Study Design: In this descriptive analysis, we reviewed pregnancy and lactation data of all new molecular entities approved between 2001 and 2020 in their most updated labeling. Information was collected regarding the pregnancy and lactation risk statements, the source of pregnancy and lactation data, and the design and methods of pregnancy and lactation studies in the labeling.

View Article and Find Full Text PDF

Inhibitor development remains a major challenge in factor VIII (FVIII) replacement therapy. verITI-8 is the first prospective study of a recombinant FVIII Fc fusion protein (rFVIIIFc; efmoroctocog alfa) for first-time immune tolerance induction (ITI) in males with severe hemophilia A and high-titer inhibitors (historical peak ≥5 Bethesda units [BU]/mL). In this single-arm, open-label, multicenter study, screening was followed by ITI (rFVIIIFc 200 IU/kg per day until tolerization or maximum of 48 weeks).

View Article and Find Full Text PDF

Background: Children with a history of allergic transfusion reactions (ATRs) receive antihistamine premedication with or without hydrocortisone to prevent subsequent reactions. We aim to examine the frequency of developing ATRs to subsequent different blood product type transfusions.

Methods: A retrospective chart review of children who received blood product transfusions (packed red blood cells, platelets, frozen plasma, intravenous immunoglobin, albumin, and cryoprecipitate) and developed ATRs.

View Article and Find Full Text PDF

Introduction:  BAY 81-8973, a full-length recombinant factor VIII for hemophilia A treatment, has been extensively evaluated in previously treated patients in the LEOPOLD (Long-Term Efficacy Open-Label Program in Severe Hemophilia A Disease) clinical trials.

Aim:  To assess BAY 81-8973 efficacy and safety when used for bleed prophylaxis and treatment in previously untreated/minimally treated patients (PUPs/MTPs).

Methods:  In this phase III, multicenter, open-label, uncontrolled study, PUPs/MTPs (<6 years old) with severe hemophilia A received BAY 81-8973 (15-50 IU/kg) at least once weekly as prophylaxis.

View Article and Find Full Text PDF

Hemophilia A is an X-linked recessive congenital bleeding disorder. Exogenous infusion of FVIII is the treatment of choice, and the development of immunoglobulins against FVIII (inhibitors) remains the major challenge in clinical management of the disease. Here, we investigated the effect of co-administration of FVIII with intravenous immunoglobulin (IVIG) on the development of inhibitors in previously untreated hemophilia A mice.

View Article and Find Full Text PDF

To investigate the occurrence of venous thromboembolism (VTE), clinical characteristics, risk factors, treatment outcomes, and anticoagulation safety in pediatric inflammatory bowel disease (IBD) over an 11-year period. A nested case-control study within an identified cohort was performed amongst children with IBD from 2009 to 2020 in Canada. There were 890 hospitalizations during the study period, and 15 venous thromboembolic events (1.

View Article and Find Full Text PDF

Patients with colorectal cancer presenting with synchronous liver metastases have less favourable outcomes than those with primary-only disease. There is evidence of different genetic mutational signatures according to the sidedness of the primary tumour. KRAS mutations are key driver mutations in colorectal cancer progression.

View Article and Find Full Text PDF

Nephrotic syndrome (NS) is a common kidney disease of childhood, affecting 2-7 children per 100,000. A potentially life-threatening complication affecting children with NS is thromboembolism (TE). However, there remains a paucity of information regarding the burden of TE and its associated risk factors in this population.

View Article and Find Full Text PDF

Background: Sleep insufficiency and disturbances affect the physical, cognitive, and emotional well-being of children.

Objective: To perform a narrative review on common sleep problems and disorders encountered in primary care for children and adolescents.

Methods: A search of English literature in the Pubmed and Google Scholar databases published from 1 January 2000 till 31 October 2021 was conducted with the keywords "sleep problem" or "sleep disorder" and "child" or "adolescent".

View Article and Find Full Text PDF

Objective: This study examined a 2-year period following an eating disorder (ED) diagnosis in order to determine patterns of health care utilization.

Method: We conducted a retrospective cohort study of children (n = 1560) diagnosed with an ED between 2000 and 2017. The ED diagnosis was made at a tertiary level hospital for children and adolescents presenting for outpatient assessment by specialist adolescent medicine physicians and recorded in a program database over this period of time.

View Article and Find Full Text PDF