NobleBlocks
Medicine Hat Regional Hospital logo

Medicine Hat Regional Hospital

Hospital / health systemMedicine Hat, Alberta, Canada

Research output, citation impact, and the most-cited recent papers from Medicine Hat Regional Hospital (Canada). Aggregated across the NobleBlocks index of 300M+ scholarly works.

Total works
45
Citations
1.2K
h-index
12
i10-index
14
Also known as
Medicine Hat Regional Hospital

Top-cited papers from Medicine Hat Regional Hospital

Surgical Management of Primary Bone Tumors of the Spine
Charles G. Fisher, Davor Saravanja, Marcel F. Dvorak, Y. Raja Rampersaud +4 more
2010· Spine119doi:10.1097/brs.0b013e3181e502e5

In Brief Study Design. Multicenter ambispective cohort analysis. Objective. The purpose of this study is to determine whether applying Enneking's principles to surgical management of primary bone tumors of the spine significanti decreases local recurrence and/or mortality. Summary of Background Data. Oncologic management of primary tumors of spine has historically been inconsistent, controversial, and open to individual interpretation. Methods. A multicenter ambispective cohort analysis from 4 tertiary care spine referral centers was done. Patients were analyzed in 2 cohorts, “Enneking Appropriate” (EA), surgical margin as recommended by Enneking, and “Enneking Inappropriate” (EI), surgical margin not recommended by Enneking. Benign tumors were not included in mortality analysis. Results. Two cohorts represented an analytic dataset with 147 patients, 86 male, average age 46 years (range: 10-83). Median follow-up was 4 (2–7) years in the EA and 6 (5.5–15.5) years in the EI. Seventy-one patients suffered at least 1 local recurrence during the study, 57 of 77 in the EI group and 14 of 70 in the EA group. EI surgical approach caused higher risk of first local recurrence (P < 0.0001). There were 48 deaths in total; 29 in the EI group and 19 in the EA. There was a strong correlation between the first local recurrence and mortality with an odds ratio of 4.69, (P < 0.0001). EI surgical approach resulted in a higher risk of mortality with a hazard ratio of 3.10, (P = 0.0485) compared to EA approach. Conclusion. Surgery results in a significant reduction in local recurrence when primary bone tumors of the spine are resected with EA margins. Local recurrence has a high concordance with mortality in resection of these tumors. A significant decrease in mortality occurs when EA surgery is used. Multicenter cohort analysis determined whether applying Enneking's principles to surgical management of primary bone tumors of spine affects local recurrence and/or mortality. Patients were analyzed in 2 cohorts, “Enneking Appropriate” and “Enneking Inappropriate.” Enneking inappropriate margins caused higher risk of local recurrence and resulted in higher risk of mortality.

An Experiment on Cognitive Remediation of Word-Reading Difficulty
J. P. Das, Rama K. Mishra, Judith E. Pool
1995· Journal of Learning Disabilities76doi:10.1177/002221949502800201

Cognitive remediation of decoding deficit was attempted by following a theoretically based program. The theory identifies four major cognitive processes: Planning, Attention, Simultaneous, and Successive (PASS) processing. The PASS Remedial Program (PREP) provides 10 structured tasks that are aimed at developing internalized strategies for mainly successive processes (6 tasks) and simultaneous process (4 tasks); deficits in either of the two may lead to poor decoding. Through its "global process" training and curriculum-related "bridging" training, PREP facilitates application of internalized strategies arrived at inductively for learning word decoding and spelling; it does not provide direct teaching of rules or exercises. To test the efficacy of PREP, we divided 51 children with decoding difficulties in Grade 4 into two groups: PREP (both global and bridging) and no treatment. In the second part of the study, children from the no-treatment group received either the global or the bridging part of PREP. The relative efficacy of training was tested by pre-, and posttests of performance on a standard word-decoding test (the WRMT-R), as well as on some cognitive tests (e.g., the CAS). The largest improvement in word decoding occurred for the PREP combined global and bridging treatment. The mechanism through which PREP improves word reading is discussed, as is the use of PREP for children at risk of developing dyslexia.

Safety and Efficacy of Tenecteplase Compared With Alteplase in Patients With Large Vessel Occlusion Stroke
Fouzi Bala, Nishita Singh, Brian Buck, Ayoola Ademola +4 more
2023· JAMA Neurology57doi:10.1001/jamaneurol.2023.2094

Importance: It is unknown whether intravenous thrombolysis using tenecteplase is noninferior or preferable compared with alteplase for patients with acute ischemic stroke. Objective: To examine the safety and efficacy of tenecteplase compared to alteplase among patients with large vessel occlusion (LVO) stroke. Design, Setting, and Participants: This was a prespecified analysis of the Intravenous Tenecteplase Compared With Alteplase for Acute Ischaemic Stroke in Canada (ACT) randomized clinical trial that enrolled patients from 22 primary and comprehensive stroke centers across Canada between December 10, 2019, and January 25, 2022. Patients 18 years and older with a disabling ischemic stroke within 4.5 hours of symptom onset were randomly assigned (1:1) to either intravenous tenecteplase or alteplase and were monitored for up to 120 days. Patients with baseline intracranial internal carotid artery (ICA), M1-middle cerebral artery (MCA), M2-MCA, and basilar occlusions were included in this analysis. A total of 1600 patients were enrolled, and 23 withdrew consent. Exposures: Intravenous tenecteplase (0.25 mg/kg) vs intravenous alteplase (0.9 mg/kg). Main Outcomes and Measures: The primary outcome was the proportion of modified Rankin scale (mRS) score 0-1 at 90 days. Secondary outcomes were an mRS score from 0 to 2, mortality, and symptomatic intracerebral hemorrhage. Angiographic outcomes were successful reperfusion (extended Thrombolysis in Cerebral Infarction scale score 2b-3) on first and final angiographic acquisitions. Multivariable analyses (adjusting for age, sex, National Institute of Health Stroke Scale score, onset-to-needle time, and occlusion location) were carried out. Results: Among 1577 patients, 520 (33.0%) had LVO (median [IQR] age, 74 [64-83] years; 283 [54.4%] women): 135 (26.0%) with ICA occlusion, 237 (45.6%) with M1-MCA, 117 (22.5%) with M2-MCA, and 31 (6.0%) with basilar occlusions. The primary outcome (mRS score 0-1) was achieved in 86 participants (32.7%) in the tenecteplase group vs 76 (29.6%) in the alteplase group. Rates of mRS 0-2 (129 [49.0%] vs 131 [51.0%]), symptomatic intracerebral hemorrhage (16 [6.1%] vs 11 [4.3%]), and mortality (19.9% vs 18.1%) were similar in the tenecteplase and alteplase groups, respectively. No difference was noted in successful reperfusion rates in the first (19 [9.2%] vs 21 [10.5%]) and final angiogram (174 [84.5%] vs 177 [88.9%]) among 405 patients who underwent thrombectomy. Conclusions and Relevance: The findings in this study indicate that intravenous tenecteplase conferred similar reperfusion, safety, and functional outcomes compared to alteplase among patients with LVO.

Effect of Time to Thrombolysis on Clinical Outcomes in Patients With Acute Ischemic Stroke Treated With Tenecteplase Compared to Alteplase: Analysis From the AcT Randomized Controlled Trial
Nishita Singh, Mohammed Almekhlafi, Fouzi Bala, Ayoola Ademola +4 more
2023· Stroke33doi:10.1161/strokeaha.123.044267

BACKGROUND: The AcT (Alteplase Compared to Tenecteplase) randomized controlled trial showed that tenecteplase is noninferior to alteplase in treating patients with acute ischemic stroke within 4.5 hours of symptom onset. The effect of time to treatment on clinical outcomes with alteplase is well known; however, the nature of this relationship is yet to be described with tenecteplase. We assessed whether the association of time to thrombolysis treatment with clinical outcomes in patients with acute ischemic stroke differs by whether they receive intravenous tenecteplase versus alteplase. METHODS: Patients included were from AcT, a pragmatic, registry-linked, phase 3 randomized controlled trial comparing intravenous tenecteplase to alteplase in patients with acute ischemic stroke. Eligible patients were &gt;18 years old, with disabling neurological deficits, presenting within 4.5 hours of symptom onset, and eligible for thrombolysis. Primary outcome was modified Rankin Scale score 0 to 1 at 90 days. Safety outcomes included 24-hour symptomatic intracerebral hemorrhage and 90-day mortality rates. Mixed-effects logistic regression was used to assess the following: (a) the association of stroke symptom onset to needle time; (b) door (hospital arrival) to needle time with outcomes; and (c) if these associations were modified by type of thrombolytic administered (tenecteplase versus alteplase), after adjusting for age, sex, baseline stroke severity, and site of intracranial occlusion. RESULTS: Of the 1538 patients included in this analysis, 1146 (74.5%; 591 tenecteplase and 555 alteplase) presented within 3 hours versus 392 (25.5%; 196: TNK and 196 alteplase) who presented within 3 to 4.5 hours of symptom onset. Baseline patient characteristics in the 0 to 3 hours versus 3- to 4.5-hour time window were similar, except patients in the 3- to 4.5-hour window had lower median baseline National Institutes of Health Stroke Severity Scale (10 versus 7, respectively) and lower proportion of patients with large vessel occlusion on baseline CT angiography (26.9% versus 18.7%, respectively). Type of thrombolytic agent (tenecteplase versus alteplase) did not modify the association between continuous onset to needle time ( P interaction =0.161) or door-to-needle time ( P interaction =0.972) and primary clinical outcome. Irrespective of the thrombolytic agent used, each 30-minute reduction in onset to needle time was associated with a 1.8% increase while every 10 minutes reduction in door-to-needle time was associated with a 0.2% increase in the probability of achieving 90-day modified Rankin Scale score 0 to 1, respectively. CONCLUSIONS: The effect of time to tenecteplase administration on clinical outcomes is like that of alteplase, with faster administration resulting in better clinical outcomes. REGISTRATION: URL: https://classic.clinicaltrials.gov ; Unique identifier: NCT03889249.

Treatment algorithm for the use of psychopharmacological agents in individuals prenatally exposed to alcohol and/or with diagnosis of fetal alcohol spectrum disorder (FASD)
Mansfield Mela, Ana Hanlon‐Dearman, A.G. Ahmed, Susan D. Rich +4 more
2020· Journal of Population Therapeutics and Clinical Pharmacology27doi:10.15586/jptcp.v27i3.681

Psychotropic medication treatment of individuals who have experienced prenatal alcohol exposure (PAE) has lagged behind psychosocial interventions. Multiple psychotropic medications are often prescribed for those diagnosed with a range of neurodevelopmental disabilities and impairments of PAE (neurodevelopmental disorder associated with prenatal alcohol exposure and/or fetal alcohol spectrum disorder [ND-PAE/FASD]). Despite the diverse comorbid mental disorders, there are no specific guidelines for psychotropic medications for individuals with ND-PAE/FASD. When prescribed, concerned family members and caregivers of individuals with ND-PAE/FASD reported that polypharmacy, which was typical and adverse effects render the psychotropic medications ineffective. The objective of this work was to generate a treatment algorithm for the use of psychopharmacological agents specifically for individuals with ND-PAE/FASD. The development of decision tree for use to prescribe psychotropic medications incorporated findings from previous research and the collective clinical experience of a multidisciplinary and international panel of experts who work with individuals with ND-PAE/FASD, including an algorithm specialist. After multiple meetings and discussions, the experts reached consensus on how best to streamline prescribing along neurodevelopmental clusters. These were subdivided into four ligand-specific, receptor-acting medication targets (hyperarousal, emotional dysregulation, hyperactive/neurocognitive, and cognitive inflexibility). Each cluster is represented by a list of common symptoms. The experts recommended that prescribers first ensure adequate psychosocial and environmental, including sufficient dietary, exercise, and sleep support before prescribing psychotropic medications. Treatment then progresses through three steps of psychotropic medications for each cluster. To support established treatment goals, the most function impairing clusters are targeted first.

AcT Trial: Protocol for a Pragmatic Registry‐Linked Randomized Clinical Trial
Tolulope T. Sajobi, Nishita Singh, Mohammed Almekhlafi, Brian Buck +4 more
2022· Stroke Vascular and Interventional Neurology25doi:10.1161/svin.122.000447

Background: Intravenous thrombolysis with alteplase is widely used in patients with acute ischemic stroke presenting early after symptom onset. Recent phase II trials have suggested that intravenous tenecteplase may be safer and associated with higher early reperfusion rates as compared with alteplase. This study investigates whether intravenous tenecteplase is noninferior to intravenous alteplase for the treatment of acute ischemic stroke. Methods: This is a pragmatic, registry-linked, prospective, randomized (1:1) controlled, open-label parallel group clinical trial (AcT [Alteplase Compared to Tenecteplase in Patients With Acute Ischemic Stroke]) with blinded end point assessment of 1600 patients to test if intravenous tenecteplase (0.25 mg/kg body weight, maximum dose 25 mg) is noninferior to intravenous alteplase (0.9 mg/kg body weight; maximum dose, 90 mg) in patients with acute ischemic stroke eligible for intravenous thrombolysis in clinical routine. Patients are recruited from comprehensive and primary stroke centers and enrolled using deferral of consent. The proposed sample has at least 90% power with a noninferiority margin of 5%, assuming incidence of the 90-day modified Rankin Scale score of 0 to 1 is 38% in the tenecteplase and 35% in the alteplase groups, and a loss to follow-up rate <5%. Results: The blinded primary end point is the proportion of subjects achieving a 90-day modified Rankin Scale score of 0 to 1. Key safety outcomes include 24-hour symptomatic intracerebral hemorrhage and 90-day all-cause mortality. All serious adverse events within a 24-hour period will be reported and coded using the Medical Dictionary for Regulatory Activities. Outcomes are collected either centrally (primary, key secondary, and safety end points) or through ongoing Canadian stroke registries. The primary analysis is a simple unadjusted comparison of proportions. Conclusions: Results from the trial will provide real-world evidence of the effectiveness of intravenous tenecteplase versus alteplase in patients with acute ischemic stroke presenting early after stroke onset.

Cross-sectional early mitral flow-velocity profiles from color Doppler in patients with mitral valve disease.
Stein Samstad, Ole Rossvoll, Hans Torp, Terje Skjærpe +1 more
1992· Circulation22doi:10.1161/01.cir.86.3.748

BACKGROUND: Cross-sectional flow-velocity profiles from early mitral flow in 20 patients (10 with mitral regurgitation and 10 with mitral stenosis) were constructed from the velocity data from each point in sequentially delayed two-dimensional digital Doppler ultrasound maps. METHODS AND RESULTS: The data suggested that the early mitral flow studied in an apical four-chamber view was variably skewed in both patient groups. The maximum flow velocity overestimated the cross-sectional mean velocity at the same time by a factor of 1.12-1.86. The maximum time-velocity integral was 1.13-1.77-fold greater than the cross-sectional mean time-velocity integral. In patients with mitral regurgitation, the cross-sectional flow-velocity profile appeared to be most skewed at the level of the mitral leaflet tips. The level of the mitral annulus appeared to give the most homogenous flow-velocity distribution in both patient groups. CONCLUSIONS: When calculations of volume flow are based on pulsed Doppler ultrasound recordings with a single sample volume, the possibility of a skewed flow-velocity profile must be taken into account.

Safety and efficacy of tenecteplase versus alteplase in stroke patients with carotid tandem lesions: Results from the AcT trial
Fouzi Bala, Mohammed Almekhlafi, Nishita Singh, Ibrahim Alhabli +4 more
2023· International Journal of Stroke13doi:10.1177/17474930231205208

BACKGROUND: Carotid tandem lesions ((TL) ⩾70% stenosis or occlusion) account for 15-20% of acute stroke with large vessel occlusion. AIMS: We investigated the safety and efficacy of intravenous tenecteplase (0.25 mg/kg) versus intravenous alteplase (0.9 mg/kg) in patients with carotid TL. METHODS: This is a substudy of the alteplase compared with the tenecteplase trial. Patients with ⩾70% stenosis of the extracranial internal carotid artery (ICA) and concomitant occlusion of the intracranial ICA, M1 or M2 segments of the middle cerebral artery on baseline computed tomography angiography (CTA) were included. Primary outcome was 90-day-modified Rankin Scale (mRS) 0-1. Secondary outcomes were mRS 0-2, mortality, and symptomatic ICH (sICH). Angiographic outcomes were successful recanalization (revised Arterial Occlusive Lesion (rAOL) 2b-3) on first and successful reperfusion (eTICI 2b-3) on final angiographic acquisitions. Multivariable mixed-effects logistic regression was performed. RESULTS: Among 1577 alteplase versus tenecteplase randomized controlled trial (AcT) patients, 128 (18.8%) had carotid TL. Of these, 93 (72.7%) underwent intravenous thrombolysis plus endovascular thrombectomy (IVT + EVT), while 35 (27.3%) were treated with IVT alone. In the IVT + EVT group, tenecteplase was associated with higher odds of 90-day-mRS 0-1 (46.0% vs. 32.6%, adjusted OR (aOR) 3.21; 95% CI = 1.06-9.71) compared with alteplase. No statistically significant differences in rates of mRS 0-2 (aOR 1.53; 95% CI = 0.51-4.55), initial rAOL 2b-3 (16.3% vs. 28.6%), final eTICI 2b-3 (83.7% vs. 85.7%), and mortality (18.0% vs. 16.3%) were found. SICH only occurred in one patient. There were no differences in outcomes between thrombolytic agents in the IVT-only group. CONCLUSION: In patients with carotid TL treated with EVT, intravenous tenecteplase may be associated with similar or better clinical outcomes, similar angiographic reperfusion rates, and safety outcomes as compared with alteplase.

Forensic Occupational Therapy in Canada: The Current State of Practice
Adora Chui, Chantal Isabelle Wong, Sara A. Maraj, Danielle Fry +2 more
2016· Occupational Therapy International12doi:10.1002/oti.1426

Although occupational therapists have been practicing in forensic settings for many years, there is a paucity of literature regarding the nature of this practice in Canada. The purpose of this study was to describe the practices of Canadian occupational therapists in forensic mental health. An online survey was designed based on the Canadian Practice Process Framework. Following purposive and snowball sampling, responses were analysed with descriptive statistics and content analysis. Twenty-seven clinicians responded (56% response rate). Respondents indicated commonalities in workplaces, client caseloads and practice challenges. The outstanding need in Canada to demonstrate client outcomes through the use of evaluation instruments reflects those practice gaps identified internationally. Education, advocacy and research are critical areas for the development of Canadian forensic occupational therapy. Although findings heavily reflect one provincial context and may not be generalizable to nonhospital settings, a number of priority areas were identified. Future efforts should clarify the role of forensic occupational therapy to stakeholders, and validate their contributions through research that evaluates intervention efficacy and meaningful outcomes. Copyright © 2016 John Wiley & Sons, Ltd.

Alteplase Compared to Tenecteplase in patients with Acute Ischemic Stroke (AcT) Trial: Protocol for a Pragmatic Registry linked Randomized Clinical Trial
Tolulope T. Sajobi, Nishita Singh, Mohammed Almekhlafi, Brian Buck +4 more
2022· Stroke Vascular and Interventional Neurology12doi:10.1161/svin.121.000447

Background : Intravenous thrombolysis with alteplase is widely used in acute ischemic stroke patients presenting early after symptom onset. Recent phase II trials have suggested that intravenous tenecteplase may be safer and associated with higher early reperfusion rates as compared to alteplase. This study investigates whether intravenous tenecteplase is non‐inferior to intravenous alteplase for the treatment of acute ischemic stroke. Methods : This is a pragmatic, registry‐linked, prospective, randomized (1:1) controlled, open‐label parallel group clinical trial with blinded endpoint assessment of 1600 patients to test if intravenous tenecteplase (0.25 mg/kg body weight, max dose 25 mg) is non‐inferior to intravenous alteplase (0.9 mg/kg body weight, max dose 90 mg) in patients with acute ischemic stroke eligible for intravenous thrombolysis in clinical routine. Patients are recruited from comprehensive and primary stroke centers and enrolled using deferral of consent. The proposed sample has at least 90% power with a non‐inferiority margin of 5%, assuming incidence of 90‐day mRS 0–1 is 38% in the tenecteplase and 35% in the alteplase groups, and a loss to follow‐up rate &lt; 5%. Results : The blinded primary endpoint is the proportion of subjects achieving a 90‐day mRS (modified Rankin scale) of 0–1. Key safety outcomes include 24‐hour symptomatic intracerebral hemorrhage and 90‐day all‐cause mortality. All serious adverse events within 24‐hour period will be reported and coded using MedDRA. Outcomes are collected either centrally (primary, key secondary and safety endpoints) or through ongoing Canadian stroke registries. The primary analysis is a simple unadjusted comparison of proportions. Conclusion : Results from the trial will provide real‐world evidence of the effectiveness of intravenous tenecteplase vs. alteplase in patients with acute ischemic stroke presenting early after stroke onset. Clinical Trial Registration: NCT03889249 https://clinicaltrials.gov/ct2/show/NCT03889249 This article is protected by copyright. All rights reserved

Understanding the exodus: a 15-year retrospective cohort study on the pattern and determinants of migration among Nigerian doctors and dentists
Oghenebrume Wariri, Patience Toyin-Thomas, Itua C G Akhirevbulu, Oladapo Babatunde Oladeinde +4 more
2024· Global Health Action8doi:10.1080/16549716.2024.2432754

BACKGROUND: Nigeria faces a critical shortage of healthcare professionals yet experiences a significant annual exodus of doctors and dentists. This alarming trend threatens the country's ability to provide equitable healthcare. OBJECTIVE: This study investigated the patterns and determinants of migration among doctors and dentists who graduated from the University of Benin, Nigeria, 15 years ago. METHODS: We conducted a retrospective cohort study that tracked 274 of the 379 (72.3%) eligible cohort. We computed the migration incidence rate per person-year from 2008 to 2023, covering 3,455 person-years of follow-up and analysed migration drivers as push and pull factors across macro-, meso-, and micro-levels. RESULTS: Fifteen years post-graduation, 48.9% (134/274) of the cohort had migrated. While the annual incidence rate of migration remained stable for the first 8 years, it spiked after 2016, reaching 11.4 per 100 person-years in 2023. Among those who migrated, the majority (96.3%, 129/134) relocated outside the African continent. The top three destination countries were the UK (48.5%, 65/134), Canada (20.9%, 28/134), and the USA (19.4%, 26/134). The leading push factors were insecurity of lives and property (57.8%), concerns about children's futures (50.3%), and limited career development opportunities (45.9%). The primary pull factors included security (56.3%), permanent residency (49.6%), and better pay in the destination country (46.7%). Significant predictors of migration included younger age, timing of marriage, and residency training status. CONCLUSIONS: To avert an impending crisis, the Nigerian government must address the root causes driving the increasing migration of doctors and dentists.

Intravenous tenecteplase compared with alteplase for minor ischaemic stroke: a secondary analysis of the AcT randomised clinical trial
Radhika Nair, Nishita Singh, Mahesh Kate, Negar Asdaghi +4 more
2024· Stroke and Vascular Neurology8doi:10.1136/svn-2023-002828

BACKGROUND: In ischaemic stroke, minor deficits (National Institutes of Health Stroke Scale (NIHSS) ≤5) at presentation are common but often progress, leaving patients with significant disability. We compared the efficacy and safety of intravenous thrombolysis with tenecteplase versus alteplase in patients who had a minor stroke enrolled in the Alteplase Compared to Tenecteplase in Patients With Acute Ischemic Stroke (AcT) trial. METHODS: The AcT trial included individuals with ischaemic stroke, aged >18 years, who were eligible for standard-of-care intravenous thrombolysis. Participants were randomly assigned 1:1 to intravenous tenecteplase (0.25 mg/kg) or alteplase (0.9 mg/kg). Patients with minor deficits pre-thrombolysis were included in this post-hoc exploratory analysis. The primary efficacy outcome was the proportion of patients with a modified Rankin Score (mRS) of 0-1 at 90-120 days. Safety outcomes included mortality and symptomatic intracranial haemorrhage (sICH). RESULTS: Of the 378 patients enrolled in AcT with an NIHSS of ≤5, the median age was 71 years, 39.7% were women; 194 (51.3%) received tenecteplase and 184 (48.7%) alteplase. The primary outcome (mRS score 0-1) occurred in 100 participants (51.8%) in the tenecteplase group and 86 (47.5 %) in the alteplase group (adjusted risk ratio (RR) 1.14 (95% CI 0.92 to 1.40)). There were no significant differences in the rates of sICH (2.9% in tenecteplase vs 3.3% in alteplase group, unadjusted RR 0.79 (0.24 to 2.54)) and death within 90 days (5.5% in tenecteplase vs 11% in alteplase group, adjusted HR 0.99 (95% CI 0.96 to 1.02)). CONCLUSION: In this post-hoc analysis of patients with minor stroke enrolled in the AcT trial, safety and efficacy outcomes with tenecteplase 0.25 mg/kg were not different from alteplase 0.9 mg/kg.

Sex-Based Analysis of Workflow and Outcomes in Acute Ischemic Stroke Patients Treated With Alteplase Versus Tenecteplase
Diana Kim, Nishita Singh, Luciana Catanese, Amy Yu +4 more
2024· Stroke8doi:10.1161/strokeaha.123.045320

BACKGROUND: Understanding sex differences in stroke care is important in reducing potential disparities. Our objective was to explore sex differences in workflow efficiency, treatment efficacy, and safety in the AcT trial (Alteplase Compared to Tenecteplase). METHODS: AcT was a multicenter, registry-linked randomized noninferiority trial comparing tenecteplase (0.25 mg/kg) with alteplase (0.9 mg/kg) in acute ischemic stroke within 4.5 hours of onset. In this post hoc analysis, baseline characteristics, workflow times, successful reperfusion (extended Thrombolysis in Cerebral Infarction score ≥2b), symptomatic intracerebral hemorrhage, 90-day functional independence (modified Rankin Scale score, 0-1), and 90-day mortality were compared by sex. Mixed-effects regression analysis was used adjusting for age, stroke severity, and occlusion site for outcomes. RESULTS: Of 1577 patients treated with intravenous thrombolysis (2019-2022), 755 (47.9%) were women. Women were older (median, 77 [68-86] years in women versus 70 [59-79] years in men) and had a higher proportion of severe strokes (National Institutes of Health Stroke Scale score >15; 32.4% versus 24.9%) and large vessel occlusions (28.7% versus 21.5%) compared with men. All workflow times were comparable between sexes. Women were less likely to achieve functional independence (31.7% versus 39.8%; unadjusted relative risk, 0.80 [95% CI, 0.70-0.91]) and had higher mortality (17.7% versus 13.3%; unadjusted relative risk, 1.33 [95% CI, 1.06-1.69]). Adjusted analysis showed no difference in outcomes between sexes. CONCLUSIONS: Differences in prognostic factors of age, stroke severity, and occlusion site largely accounted for higher functional dependence and mortality in women. No sex disparities were apparent in workflow quality indicators. Given the integration of the AcT trial into clinical practice, these results provide reassurance that no major sex biases are apparent in acute stroke management throughout participating Canadian centers. REGISTRATION: URL: https://www.clinicaltrials.gov; Unique identifier: NCT03889249.

Mechanical Thrombectomy Workshops Improve Procedural Knowledge and Skills Among Neurointerventional Teams in Low- to Middle-Income Countries
Violiza Inoa, Ryna Then, Nicole M Cancelliere, Gary Spiegel +4 more
2024· Stroke6doi:10.1161/strokeaha.124.046516

BACKGROUND: While mechanical thrombectomy (MT) is proven to be lifesaving and disability sparing, there remains a disparity in its access in low- to middle-income countries. We hypothesized that team-based MT workshops would improve MT knowledge and skills. METHODS: We designed a 22-hour MT workshop, conducted as 2 identical events: in English (Jamaica, January 2022) and in Spanish (Dominican Republic, May 2022). The workshops included participating neurointerventional teams (practicing neurointerventionalists, neurointerventional nurses, and technicians) focused on acute stroke due to large vessel occlusion. The course faculty led didactic and hands-on components, covering topics from case selection and postoperative management to device technology and MT surgical techniques. Attendees were evaluated on stroke knowledge and MT skills before and after the course using a multiple choice exam and simulated procedures utilizing flow models under fluoroscopy, respectively. Press conferences for public education with invited government officials were included to raise stroke awareness. RESULTS: Twenty-two physicians and their teams from 8 countries across the Caribbean completed the didactic and hands-on training. Overall test scores (n=18) improved from 67% to 85% ( P &lt;0.002). Precourse and postcourse hands-on assessments demonstrated reduced time to completion from 36.5 to 21.1 minutes ( P &lt;0.001). All teams showed an improvement in measures of good MT techniques, with 39% improvement in complete reperfusion. Eight teams achieved a Thrombolysis in Cerebral Infarction score of 3 on pre-course versus 15 of 18 teams on post-course. There was a significant reduction in total potentially dangerous maneuvers (70% pre versus 20% post; P &lt;0.002). Universally, the workshop was rated as satisfactory and likely to change practice in 93% Dominican Republic and 75% Jamaica. CONCLUSIONS: A team-based hands-on simulation approach to MT training is novel, feasible, and effective in improving procedural skills. Participants viewed these workshops as practice-changing and instrumental in creating a pathway for increasing access to MT in low- to middle-income countries.

Declining Corticosteroid Use for Inflammatory Bowel Disease Across Alberta: A Population-Based Cohort Study
Cynthia H. Seow, Stephanie Coward, Karen I. Kroeker, Jesse Stach +4 more
2022· Journal of the Canadian Association of Gastroenterology5doi:10.1093/jcag/gwac021

Abstract Background and Aims Corticosteroid-free remission is a primary treatment goal in IBD which may be achieved with greater use of anti-TNF therapy. We defined temporal trends of corticosteroid use, anti-TNF use, hospitalization and surgery in a prevalent IBD cohort within the province of Alberta, Canada. Methods Health administrative data were used to identify medication dispensing, hospitalizations and surgery in individuals with IBD from 2010 to 2015. Temporal trends were calculated using log-binomial regression for medications and log-linear models for hospitalizations and surgery rates. Analyses were stratified based on geographic location. Results Of 28890 individuals with IBD, 50.3% had Crohn’s disease. One in six individuals (15.45%) were dispensed a corticosteroid. Corticosteroid use decreased in both metropolitan areas (AAPC −20.08%, 95% CI: −21.78 to −18.04) and non-metropolitan areas (AAPC −18.14%, 95% CI: −20.78 to −18.04) with a similar pattern for corticosteroid dependence. Corticosteroid dependence was more prevalent in UC vs. CD (P &amp;lt; 0.05), and in the pediatric IBD cohort (13.45) compared to the adult (8.89) and elderly (7.54) cohorts (per 100 prevalent population, P &amp;lt; 0.001). The proportion of individuals dispensed an anti-TNF increased over the study period (AAPC 12.58%, 95% CI: 11.56 to 13.61). Significantly more non-metropolitan versus metropolitan residing individuals were hospitalized for any reason, for an IBD-related, or IBD-specific indication (all P &amp;lt; 0.001) though the proportion requiring IBD surgery was similar between groups. Conclusions An increase in anti-TNF use corresponded to a decline in corticosteroid use and dependence in those with IBD. Inequities in IBD care still exist based on location and age.

Impact of Provider Payment Structure on Obstetric Interventions and Outcomes: A Difference-in-Differences Analysis
Imran Pirwany, Stephen Wood, Janice Skiffington, Amy Metcalfe
2020· Journal of Obstetrics and Gynaecology Canada5doi:10.1016/j.jogc.2019.11.071

OBJECTIVE: Traditionally, Canadian physicians provide care on a fee-for-service (FFS) basis; however, this model has been criticized as it incentivizes quantity of care over quality of care. Consequently, all Canadian provinces and territories have implemented some form of alternative payment plan. Evaluation of the impact of these policy changes, however, has typically focused on family physicians as opposed to specialists. METHODS: On January 1, 2004, obstetricians at the Medicine Hat Regional Hospital (MHRH) transitioned from FFS to salary. A difference-in-differences analysis was used to examine the impact of changes in obstetrician payment structure on the use of obstetric interventions and neonatal outcomes controlling for temporal trends at MHRH (intervention group) and the Chinook Regional Hospital (CRH; comparison group) from 2002 to 2005. RESULTS: Between the pre-intervention period (2002-2003) and the post-intervention period (2004-2005), the rate of cesarean delivery increased significantly at both sites. Following adjustment for time of day, day of week, and antepartum risk score, the difference-in-difference estimator demonstrated a 5.8% (95% CI 1.5-10.0) increase in cesarean deliveries performed by obstetricians at MHRH compared with cesarean deliveries done at CRH after accounting for baseline differences and temporal trends. No significant differences were observed for family physicians. No significant differences were observed for other obstetric interventions or neonatal outcomes. CONCLUSION: Under an FFS model, obstetricians are incentivized to cesarean delivery due to the increased reimbursement rate; however, the increase in cesarean deliveries at MHRH following the transition to a salary model was unexpected. This finding suggests that, in Canada, financial incentives are not a factor that explains the increasing rate of cesarean delivery.

Safety, Functional Disability, Healthcare Utilization, and Quality-of-Life Outcomes in Elderly Receiving Alteplase and Tenecteplase: A Secondary Analysis From the AcT Trial
Nishita Singh, Fouzi Bala, Ayoola Ademola, Mohammed Almekhlafi +4 more
2025· Stroke5doi:10.1161/strokeaha.124.049512

BACKGROUND: Older age has been associated with overall poorer outcomes in acute ischemic stroke. We compared (1) outcomes in various health-related domains among patients &lt;80 years and ≥80 years presenting with acute ischemic stroke and (2) whether outcomes differ between intravenous TNK (tenecteplase) versus alteplase. METHODS: Data are from patients included in AcT (Alteplase Compared to Tenecteplase in Patients With Acute Ischemic Stroke), a pragmatic, registry-linked, phase 3 randomized controlled trial comparing TNK with alteplase. Outcomes included functional disability (per 90-day modified Rankin Scale), safety (24-hour symptomatic intracerebral hemorrhage, 90-day mortality rates), health care utilization (discharge destination, length of stay, thrombectomy rate), and quality of life measures (EQ-5D-5L [EuroQol 5-Dimension 5-Level Scale]). With an a priori plan, patients aged &lt;80 years were compared with those ≥80 years at symptom onset. Mixed effects Poisson regression was used to assess (1) the association of age with outcomes and (2) if these associations were modified by thrombolytic administered (TNK versus alteplase), after adjusting for sex, and baseline stroke severity. RESULTS: Of the 1577 patients, 1034 (65.6%; 520: TNK and 514: alteplase) were &lt;80 years and 543 (34.4%; 286: TNK and 257: alteplase) were ≥80 years of age. Baseline characteristics in the 2 groups were similar except for sex 40% female in &lt;80 years group versus 62.8% female in ≥80 years. There was no difference in rates of symptomatic intracranial hemorrhage (3.5% versus 3.1%). Patients in the ≥80 years group had significantly lower rates of excellent functional outcome, return to baseline status, higher mortality, and lower quality-of-life outcomes as compared with the &lt;80 years group. Length of hospital stay was similar between the 2 groups but, patients in the ≥80 years age group had significantly lower rates of endovascular treatment utilization. Type of thrombolytic agent (TNK versus alteplase) did not modify the association between age and primary clinical outcome ( P interaction =0.22). CONCLUSIONS: Similar to alteplase, increasing age was associated with poorer functional outcomes with TNK. Rates of angiographic and bleeding outcomes were similar between patients &lt;80 and ≥80 years. REGISTRATION: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT03889249.

Images in spine surgery: atlantoaxial instability in Down syndrome.
Salman Riaz, James M. Drake, Douglas Hedden
2007· PubMed4

A 6 year old boy with Down syndrome, presented with a 6 month history of neck pain. The pain was located in the suboccipital region with referral to the posterior part of the occiput, rostrally. His family had noticed that he had difficulty in walking and had unsteadiness of gait for a few months, which had led to a few falls. This was progressively getting worse. He did not report any loss of motor strength, sensory disturbance or bladder/ bowel incontinence. Examination showed that his neck pain was accentuated with flexion and extension. He had mildly increased tone in all extremities. His motor strength and sensory examination was within normal limits. He demonstrated hyper-reflexia in all four extremities and had a positive Babinski sign bilaterally. Sustained left sided clonus was also noted. On the flexion X-rays of his cervical spine an increased ADI (Atlanto-Dens interval) of 11 mm was noted. His CT scan confirmed this finding and also demonstrated an associated Dystropic Os Odontoideum. MRI examination showed an extensive area of high signal intensity at the cervico-medullary junction. The patient had application of a halo ring under fluoroscopic guidance and an awake intubation. He was placed in a halo vest for positioning prone. The prone positioning was performed under neuromonitoring with SSEP (Somatosensory evoked potentials) and MEP (Motor evoked potentials). This patient underwent a posterior occipitocervical instrumentation and fusion in the reduced position. He was instrumented using sublaminar wires as the anatomy of the Axis was deemed inappropriate for screw fixation. His Postoperative C-spine x-rays showed a reduced ADI and on flexion/extension views there was no sign of Atlanto-Axial instability. Post operatively he remained in a halo vest for 3 months. Resolution of patient's symptoms was noted on periodic follow-up exams with complete restoration to a stable gait.

Quality of Life After Intravenous Thrombolysis for Acute Ischemic Stroke: Results From the AcT Randomized Controlled Trial
Tolulope T. Sajobi, Olayinka I. Arimoro, Ayoola Ademola, Nishita Singh +4 more
2024· Stroke4doi:10.1161/strokeaha.123.044690

BACKGROUND: Recent evidence from thrombolysis trials indicates the noninferiority of intravenous tenecteplase to intravenous alteplase with respect to good functional outcomes in patients with acute stroke. We examined whether the health-related quality of life (HRQOL) of patients with acute stroke differs by the type of thrombolysis treatment received. In addition, we examined the association between the modified Rankin Scale score 0 to 1 and HRQOL and patient-reported return to prebaseline stroke functioning at 90 days. METHODS: Data were from all patients included in the AcT trial (Alteplase Compared to Tenecteplase), a pragmatic, registry-linked randomized trial comparing tenecteplase with alteplase. HRQOL at 90-day post-randomization was assessed using the 5-item EuroQOL questionnaire (EQ5D), which consists of 5 items and a visual analog scale (VAS). EQ5D index values were estimated from the EQ5D items using the time tradeoff approach based on Canadian norms. Tobit regression and quantile regression models were used to evaluate the adjusted effect of tenecteplase versus alteplase treatment on the EQ5D index values and VAS score, respectively. The association between return to prebaseline stroke functioning and the modified Rankin Scale score 0 to 1 and HRQOL was quantified using correlation coefficient ( r ) with 95% CI. RESULTS: Of 1577 included in the intention-to-treat analysis patients, 1503 (95.3%) had complete data on the EQ5D. Of this, 769 (51.2%) were administered tenecteplase and 717 (47.7%) were female. The mean EQ5D VAS score and EQ5D index values were not significantly higher for those who received intravenous tenecteplase compared with those who received intravenous alteplase ( P =0.10). Older age ( P &lt;0.01), more severe stroke assessed using the National Institutes of Health Stroke Scale ( P &lt;0.01), and longer stroke onset-to-needle time ( P =0.004) were associated with lower EQ5D index and VAS scores. There was a strong association ( r , 0.85 [95% CI, 0.81–0.89]) between patient-reported return to prebaseline functioning and modified Rankin Scale score 0 to 1 Similarly, there was a moderate association between return to prebaseline functioning and EQ5D index ( r , 0.45 [95% CI, 0.40–0.49]) and EQ5D VAS scores ( r , 0.42 [95% CI, 0.37–0.46]). CONCLUSIONS: Although there is no differential effect of thrombolysis type on patient-reported global HRQOL and EQ 5D-5L index values in patients with acute stroke, sex- and age-related differences in HRQOL were noted in this study. REGISTRATION: URL: https://www.clinicaltrials.gov ; Unique identifier: NCT03889249.

Feasibility of telephone and computerized cognitive testing as a secondary outcome in an acute stroke clinical trial: A mixed methods sub-study of the AcT Trial
Sajeevan Sujanthan, Pugaliya Puveendrakumaran, Katie N. Dainty, Morgan D. Barense +4 more
2025· European Stroke Journal4doi:10.1177/23969873251323171

Abstract Introduction Post-stroke cognitive impairment is associated with impaired quality of life. Remote testing provides a potential avenue to measure cognitive outcomes efficiently. Patients and Methods Prospective cognitive outcomes were collected at 90–180 days using both telephone MoCA (T-MoCA; range 0–22; &amp;lt;17 impairment) and Creyos, a computerized cognitive battery. Key variables associated with completion were assessed using logistic regressions. Mixed methods brief structured interviews and exit survey were performed to explore barriers to completing computer testing. Results Of 791 potentially eligible patients (mean age 70 ± 14 years), there was low feasibility of remote cognitive testing, with only 401 (51%) completing the T-MoCA, and 242 (31%) completing Creyos. Our regression models show that age (ORT-MoCA: 0.95 (95% Confidence Interval (CI): 0.94–0.97); ORCreyos: 0.95 (95% CI: 0.94–0.96)), functional impairment (mRS 2–5; ORT-MoCA: 0.55 (95% CI: 0.37–0.81); ORCreyos: 0.66 (95% CI: 0.44–0.98)), quality of life (EQ-VAS; ORT-MoCA: 1.02 (95% CI: 1.01–1.03); ORCreyos: OR:1.02 (95% CI: 1.01–1.03)) and length of hospital stay (ORT-MoCA: 0.98 (95% CI: 0.96–0.99); ORCreyos: 0.97 (95% CI: 0.94–0.99)) predicted both telephone and computer cognitive test completion; computer literacy predicted computer test completion (ORCreyos: 1.12 (95% CI: 1.04–1.21)). In interviews, a preference for accessibility of computerized testing was reported. Discussion Remote cognitive testing has limited feasibility as a secondary outcome in large acute stroke trials. Patients who are older, with worse quality of life, or severe functional impairment post-stroke are less likely to complete remote cognitive outcomes. Conclusion Innovative approaches to post-stroke cognitive outcomes in acute stroke trials are needed. Data Access Data available upon request.