Regional Learning Collaboratives Produce Rapid and Sustainable Improvements in Stroke Thrombolysis Times

Barriers to Enrollment in a Post-Stroke Neuromodulation and Walking Study: Implications for Recruiting Women

BACKGROUND

Women have a higher risk of stroke and related disability than men but are underrepresented in stroke clinical trials. Identifying modifiable recruitment and enrollment barriers for women can improve study generalizability, statistical power, and resource utilization.

OBJECTIVE

In a post-stroke neuromodulation study, we determined the impact of sex on the occurrence of exclusion criteria and compared the sex distribution of screened and enrolled individuals with a broader stroke-affected population.

METHODS

A total of 335 individuals with chronic stroke were screened for a study examining how neuromodulation and high-intensity treadmill training affect walking speed and corticomotor excitability. Demographics and exclusions were retrospectively gathered as a secondary dataset. Exclusion criteria consisted of 6 categories (not target population, unable to do treadmill protocol, unable to do non-invasive brain stimulation, insufficient ankle motion and disinterest, and cognitive impairment). Incidence of each exclusion criterion was compared between women and men. The sex distribution was compared to a dataset from Chicago primary stroke centers.

RESULTS

A total of 81 individuals were enrolled and 254 were not. The percentage of women excluded was significantly greater than that of men (P = .04). No individual exclusion criterion or categories excluded women more frequently than men. Screened and enrolled individuals had a lower proportion of women and younger age than a representative stroke population (P < .001).

CONCLUSIONS

We identified exclusion criteria (ie, headaches, cognitive scores, and age) that are modifiable barriers to enrollment of women in this post-stroke neuromodulation study. Addressing underrepresentation of women in stroke research is pivotal for enhancing generalizability, achieving statistical power, and optimizing resources.

Stumbling Blocks to Stroke Thrombolysis: An Indian Perspective

Background and purpose

Stroke is a leading cause of morbidity and mortality worldwide. Developing countries, however, still lag behind in providing timely thrombolytic therapy (TLT) to many eligible patients owing to various reasons. This study aims to identify such factors.

Materials and methods

This was a descriptive observational study undertaken over a period of 18 months at a tertiary care teaching hospital and included 252 acute ischemic stroke patients of which 200 were not thrombolyzed. The reasons for nonthrombolysis were recorded and analyzed.

Results

The study included 252 acute ischemic stroke patients of which only 20% were thrombolyzed. Of the 200 nonthrombolyzed patients, 55% arrived out of the window period while patient-related factors were the second biggest factor preventing thrombolysis. Hospital factors at 14% and financial constraints at 4.5% contributed significantly. Delayed consent emerged as an important factor making 6% of the delays.

Conclusion

Stroke thrombolysis still faces various pre- and intrahospital barriers in India. There is an urgent need to improve infrastructure and organizational streamlining to enable eligible patients to receive prompt treatment.

How to cite this article

Shah A, Diwan A. Stumbling Blocks to Stroke Thrombolysis: An Indian Perspective. Indian J Crit Care Med 2023;27(9):616-619.

What's the Future of Vascular Neurology?

The field of vascular neurology has made tremendous advances over the last several decades, with major shifts in diagnosis, treatment, prevention, and rehabilitation of patients with stroke. Furthermore, the individuals who are providing the care represent a different cohort than those who were caring for stroke patients 30 years ago, with the increasing need for rapid decision-making for acute interventions and a larger workforce being needed to provide the many complicated aspects of care of stroke patients. Understanding the history of the field is critical before one can speculate about its future directions. In summarizing some of the past massive shifts in the past few decades, this review will discuss future opportunities and future challenges and will introduce the rest of this special issue focusing on vascular neurology in a post-thrombectomy era. Although thrombolysis and thrombectomy remain a major part of ischemic stroke management and care, in the coming years, there will likely be further modifications in how we provide the care, who provides it, how we train those individuals who provide it, where it is provided, and what data inform early management decisions.

Organizational Factors Determining Access to Reperfusion Therapies in Ischemic Stroke-Systematic Literature Review

BACKGROUND

After onset of acute ischemic stroke (AIS), there is a limited time window for delivering acute reperfusion therapies (ART) aiming to restore normal brain circulation. Despite its unequivocal benefits, the proportion of AIS patients receiving both types of ART, thrombolysis and thrombectomy, remains very low. The organization of a stroke care pathway is one of the main factors that determine timely access to ART. The knowledge on organizational factors influencing access to ART is sparce. Hence, we sought to systematize the existing data on the type and frequency of pre-hospital and in-hospital organizational factors that determine timely access to ART in patients with AIS.

METHODOLOGY

Literature review on the frequency and type of organizational factors that determine access to ART after AIS. Pubmed and Scopus databases were the primary source of data. OpenGrey and Google Scholar were used for searching grey literature. Study quality analysis was based on the Newcastle-Ottawa Scale.

RESULTS

A total of 128 studies were included. The main pre-hospital factors associated with delay or access to ART were medical emergency activation practices, pre-notification routines, ambulance use and existence of local/regional-specific strategies to mitigate the impact of geographic distance between patient locations and Stroke Unit (SU). The most common intra-hospital factors studied were specific location of SU and brain imaging room within the hospital, and the existence and promotion of specific stroke treatment protocols. Most frequent factors associated with increased access ART were periodic public education, promotion of hospital pre-notification and specific pre- and intra-hospital stroke pathways. In specific urban areas, mobile stroke units were found to be valid options to increase timely access to ART.

CONCLUSIONS

Implementation of different organizational factors and strategies can reduce time delays and increase the number of AIS patients receiving ART, with most of them being replicable in any context, and some in only very specific contexts.

Improving Sepsis Management Through the Emergency Quality Network Sepsis Initiative

BACKGROUND

Public reporting of the Centers for Medicare & Medicaid (CMS) SEP-1 sepsis quality measure is often too late and without the data granularity to inform real-time quality improvement (QI). In response, the American College of Emergency Physicians (ACEP) Emergency Quality Network (E-QUAL) Sepsis Initiative sought to support QI efforts through benchmarking of preliminary draft SEP-1 scores for emergency department (ED) patients. This study sought to determine the anticipatory value of these preliminary SEP-1 benchmarking scores and publicly reported performance.

METHODS

Cross-sectional analysis was performed on QI data collected from hospital-based ED sites participating in the E-QUAL Sepsis Collaborative in 2017 and 2018. Participating EDs submitted SEP-1 benchmarking scores semiannually, which were compared to publicly reported CMS SEP-1 data. EDs also reported implementation data on a variety of sepsis-related QI activities for comparison based on SEP-1 performance.

RESULTS

Among 220 EDs participating in E-QUAL, SEP-1 benchmarking scores showed weak but statistically significant correlation with CMS SEP-1 scores (r = 0.189, p = 0.01). Mean E-QUAL SEP-1 benchmarking scores were higher than mean CMS SEP-1 scores (74.1% vs. 57.2%), with 83.2% of sites reporting a benchmarking score higher than the CMS SEP-1 score. EDs with SEP-1 scores in the bottom 20% reported completion of more sepsis-related QI activities than EDs with average or top 20% SEP-1 scores.

CONCLUSION

Preliminary benchmarking results demonstrate a weak, statistically significant correlation with subsequent publicly reported CMS SEP-1 scores and suggest that ED performance in sepsis care may exceed overall hospital performance inclusive of all inpatients. Sepsis quality measurement and sepsis QI efforts may be best guided by separating ED sepsis cases from in-hospital sepsis cases as is done for other acute time-sensitive conditions.

Evaluation of a Multilevel Program to Improve Clinician Adherence to Management Guidelines for Acute Ischemic Stroke

IMPORTANCE

Promotion of clinician adherence to stroke guidelines can improve stroke outcomes.

OBJECTIVE

To investigate the outcomes of a multilevel system program on clinician adherence to guidelines for treatment of patients with acute ischemic stroke (AIS).

DESIGN, SETTING, AND PARTICIPANTS

This quality improvement study used a prospective interrupted time series (ITS) and difference-in-difference (DID) design, from August 1, 2018, to January 31, 2020, divided into preprogram term and short and long postprogram terms; each term had 6 months. Data were collected during hospitalization and at discharge with an automated medical record data capture system in 58 public hospitals in Zhejiang province, China. Data were analyzed from August 2018 to January 2020.

EXPOSURES

The multilevel system program included a modularized standard template for medical records, centrally supported continuing education, continuous monitoring and feedback, and collaborative workshops.

MAIN OUTCOMES AND MEASURES

The primary outcome was adherence to 12 key performance indicators (KPIs), expressed as (1) percentage of patient-applicable KPIs achieved in each participant and (2) percentage of participants among whom all applicable KPIs were achieved (dichotomous all-or-none measure). The secondary outcome was severe disability or death (modified Rankin Scale 5-6) at discharge.

RESULTS

Among 45 091 patients (mean [SD] age, 69 [12] years; 18 347 female [40.7%]), 28 721 from 30 hospitals received the program and 16 370 from 28 hospitals continued routine care. In adjusted DID analysis, the program was associated with an increase in the absolute percentage of KPIs achieved per patient (6.46%; 95% CI, 5.49% to 7.43%), absolute rate of all-or-none success (8.29%; 95% CI, 6.99% to 9.60%), and decreased rate of severe disability or death at discharge (-1.68%; 95% CI, -2.99% to -0.38%). The ITS result showed the program was associated with an increase in KPIs achieved per patient per week (slope change in short-term period, 0.36%; 95% CI, 0.20% to 0.52%; level change in long-term period, (9.64%; 95% CI, 4.58% to 14.69%) and in all-or-none success (slope change in short-term period 0.34%; 95% CI, 0.23% to 0.46%; level change in long-term period 5.89%; 95% CI, 0.19% to 11.59%).

CONCLUSIONS AND RELEVANCE

The centrally supported program was associated with increases in clinician adherence to guidelines and reduced the proportion of severely disabled or deceased patients with AIS at discharge, providing support for its wider implementation.

The effectiveness of quality improvement collaboratives in improving stroke care and the facilitators and barriers to their implementation: a systematic review

Background

To successfully reduce the negative impacts of stroke, high-quality health and care practices are needed across the entire stroke care pathway. These practices are not always shared across organisations. Quality improvement collaboratives (QICs) offer a unique opportunity for key stakeholders from different organisations to share, learn and ‘take home’ best practice examples, to support local improvement efforts. This systematic review assessed the effectiveness of QICs in improving stroke care and explored the facilitators and barriers to implementing this approach.

Methods

Five electronic databases (MEDLINE, CINAHL, EMBASE, PsycINFO, and Cochrane Library) were searched up to June 2020, and reference lists of included studies and relevant reviews were screened. Studies conducted in an adult stroke care setting, which involved multi-professional stroke teams participating in a QIC, were included. Data was extracted by one reviewer and checked by a second. For overall effectiveness, a vote-counting method was used. Data regarding facilitators and barriers was extracted and mapped to the Consolidated Framework for Implementation Research (CFIR).

Results

Twenty papers describing twelve QICs used in stroke care were included. QICs varied in their setting, part of the stroke care pathway, and their improvement focus. QIC participation was associated with improvements in clinical processes, but improvements in patient and other outcomes were limited. Key facilitators were inter- and intra-organisational networking, feedback mechanisms, leadership engagement, and access to best practice examples. Key barriers were structural changes during the QIC’s active period, lack of organisational support or prioritisation of QIC activities, and insufficient time and resources to participate in QIC activities. Patient and carer involvement, and health inequalities, were rarely considered.

Conclusions

QICs are associated with improving clinical processes in stroke care; however, their short-term nature means uncertainty remains as to whether they benefit patient outcomes. Evidence around using a QIC to achieve system-level change in stroke is equivocal. QIC implementation can be influenced by individual and organisational level factors, and future efforts to improve stroke care using a QIC should be informed by the facilitators and barriers identified. Future research is needed to explore the sustainability of improvements when QIC support is withdrawn.

Trial registration

Protocol registered on PROSPERO (CRD42020193966).

Supplementary Information

The online version contains supplementary material available at 10.1186/s13012-021-01162-8.

Door-In-Door-Out Process Times at Primary Stroke Centers in Chicago

STUDY OBJECTIVE

Acute stroke patients often require interfacility transfer from primary stroke centers to comprehensive stroke centers. Given the time-sensitive benefits of endovascular reperfusion, reducing door-in-door-out time at the primary stroke center is a target for quality improvement. We sought to identify modifiable predictors of door-in-door-out times at 3 Chicago-region primary stroke centers.

METHODS

We performed a retrospective analysis of consecutive patients with acute stroke from February 1, 2018 to January 31, 2020 who required transfer from 1 of 3 primary stroke centers to 1 of 3 affiliated comprehensive stroke centers in the Chicago region. Stroke coordinators at each primary stroke center abstracted data on type of transport, medical interventions and treatments prior to transfer, and relevant time intervals from patient arrival to departure. We evaluated predictors of door-in-door-out time using median regression models.

RESULTS

Of 191 total patients, 67.9% arrived by emergency medical services and 57.4% during off-hours. Telestroke was performed in 84.2%, 30.5% received alteplase, and 48.4% underwent a computed tomography (CT) angiography at the primary stroke center. The median door-in-door-out time was 148.5 (interquartile range 106 to 207.8) minutes. The largest contributors to door-in-door-out time, in minutes, were CT to CT angiography time (22 [7 to 73.5]), transfer center contact to ambulance request time (20 [8 to 53.3]), ambulance request to arrival time (20.5 [14 to 36]), and transfer ambulance time at primary stroke center (26 [21 to 35]). Factors associated with door-in-door-out time were (adjusted median differences, in minutes [95% confidence intervals]): CT angiography performed at primary stroke center (+39 [12.3 to 65.7]), walk-in arrival mode (+53 [4.1 to 101.9]), administration of intravenous alteplase (-29 [-31.3 to -26.7]), intubation at primary stroke center (+23 [7.3 to 38.7]), and ambulance request by primary stroke center (-20 [-34.3 to -5.7]).

CONCLUSION

Door-in-door-out times at Chicago-area primary stroke centers average nearly 150 minutes. Reducing time to CT angiography, receipt of alteplase, and ambulance request are likely important modifiable targets for interventions to decrease door-in-door-out times at primary stroke centers.

In-hospital systems interventions in acute stroke reperfusion therapy: a meta-analysis

OBJECTIVES

The value of in-hospital systems-based interventions in streamlining treatment delays associated with reperfusion therapy delivery in acute ischaemic stroke (AIS), in the emergency department (ED), is poorly understood. This systematic review and meta-analysis aimed to assess and quantify the value of in-hospital systems-based interventions in streamlining reperfusion therapy delivery following AIS.

MATERIAL & METHODS

Articles from the following databases were retrieved: Medline, Embase and Cochrane Central Register of Controlled Trials. The primary endpoint was in-hospital time metrics between the intervention and control group. The secondary endpoint included the rate of good functional outcome at 90 days.

RESULTS

393 Systems intervention studies published after 2015 were screened, and 231 full articles were then read. In total, 35 studies with 35,815 patients were included in the final systematic review and 26 studies with 7,089 patients were used in the meta-analysis. The greatest time reductions from in-hospital system interventions were achieved in door-to-needle (DTN) time (SMD: -2.696, 95% CI: -2.976, -2.416, z = 3.03, p = 0.002). Systems interventions were also associated with a statistically significant improvement in mortality (RR: 0.25, 95% CI: 0.18, 0.38), rate of symptomatic intracerebral haemorrhage (RR: 0.07, 95% CI: 0.04, 0.1) and ≤60-minute reperfusion rates (RR: 0.63, 95% CI: 0.51, 0.79).

CONCLUSIONS

The use of in-hospital workflow optimization is imperative to expedite reperfusion therapy delivery and improving patient outcomes. To reduce the morbidity and mortality of stroke globally, in-hospital workflow guidelines should be adhered to and incorporated including the optimal elements identified in this study.

Implementation of a provincial acute stroke pathway and its impact on access to advanced stroke care in Saskatchewan

Background

For ischaemic stroke, outcome severity is heavily time dependent. Systems of care need to be in place to ensure that patients with stroke are treated quickly and appropriately across entire health regions. Prior to this study, the province of Saskatchewan, Canada did not have a provincial stroke strategy in place.

Methods

A quality improvement project was undertaken to create and evaluate a provincial stroke strategy. The Saskatchewan Acute Stroke Pathway was created using a multidisciplinary team of experts, piloted at five stroke centres and then implemented provincially. The number of stroke alerts, door-to-imaging, door-to-needle, door-to-groin puncture times and treatment rates were collected at all centres. Improvements over time were analysed using run charts and individuals control charts.

Results

The number of stroke alerts province-wide trended upwards in the last 6 months of the study. There were no clear trends or shifts in the proportion of stroke alerts treated with alteplase or endovascular therapy. Across the province, the weighted mean door-to-imaging time decreased from 21 to 15 min, the weighted mean door-to-needle time decreased from 62 to 47 min and the mean door-to-groin puncture time decreased from 83 to 70 min. There was high variability in the degree of improvement from centre to centre.

Conclusions

The implementation of a province wide acute stroke pathway has led to improvement in stroke care on a provincial basis. Further work addressing intercentre variability is ongoing.

Prehospital Comprehensive Stroke Center vs Primary Stroke Center Triage in Patients With Suspected Large Vessel Occlusion Stroke

Importance

Endovascular therapy (EVT) improves functional outcomes in acute ischemic stroke (AIS) with large vessel occlusion (LVO). Whether implementation of a regional prehospital transport policy for comprehensive stroke center triage increases use of EVT is uncertain.

Objective

To evaluate the association of a regional prehospital transport policy that directly triages patients with suspected LVO stroke to the nearest comprehensive stroke center with rates of EVT.

Design, Setting, and Participants

This retrospective, multicenter preimplementation-postimplementation study used an interrupted time series analysis to compare treatment rates before and after implementation in patients with AIS arriving at 15 primary stroke centers and 8 comprehensive stroke centers in Chicago, Illinois, via emergency medical services (EMS) transport from December 1, 2017, to May 31, 2019 (9 months before and after implementation in September 2018). Data were analyzed from December 1, 2017, to May 31, 2019.

Interventions

Prehospital EMS transport policy to triage patients with suspected LVO stroke, using a 3-item stroke scale, to comprehensive stroke centers.

Main Outcomes and Measures

Rates of EVT before and after implementation among EMS-transported patients within 6 hours of AIS onset.

Results

Among 7709 patients with stroke, 663 (mean [SD] age, 68.5 [14.9] years; 342 women [51.6%] and 321 men [48.4%]; and 348 Black individuals [52.5%]) with AIS arrived within 6 hours of stroke onset by EMS transport: 310 of 2603 (11.9%) in the preimplementation period and 353 of 2637 (13.4%) in the postimplementation period. The EVT rate increased overall among all patients with AIS (preimplementation, 4.9% [95% CI, 4.1%-5.8%]; postimplementation, 7.4% [95% CI, 7.5%-8.5%]; P < .001) and among EMS-transported patients with AIS within 6 hours of onset (preimplementation, 4.8% [95% CI, 3.0%-7.8%]; postimplementation, 13.6% [95% CI, 10.4%-17.6%]; P < .001). On interrupted time series analysis among EMS-transported patients, the level change within 1 month of implementation was 7.15% (P = .04) with no slope change before (0.16%; P = .71) or after (0.08%; P = .89), which indicates a step rather than gradual change. No change in time to thrombolysis or rate of thrombolysis was observed (step change, 1.42%; P = .82). There were no differences in EVT rates in patients not arriving by EMS in the 6- to 24-hour window or by interhospital transfer or walk-in, irrespective of time window.

Conclusions and Relevance

Implementation of a prehospital transport policy for comprehensive stroke center triage in Chicago was associated with a significant, rapid, and sustained increase in EVT rate for patients with AIS without deleterious associations with thrombolysis rates or times.

Aiming for quality: a global compass for national learning systems

INTRODUCTION

Transforming a health system into a learning one is increasingly recognized as necessary to support the implementation of a national strategic direction on quality with a focus on frontline experience. The approach to a learning system that bridges the gap between practice and policy requires active exploration.

METHODS

This scoping review adapted the methodological framework for scoping studies from Arksey and O'Malley. The central research question focused on common themes for learning to improve the quality of health services at all levels of the national health system, from government policy to point-of-care delivery.

RESULTS

A total of 3507 records were screened, resulting in 101 articles on strategic learning across the health system: health professional level (19%), health organizational level (15%), subnational/national level (26%), multiple levels (35%), and global level (6%). Thirty-five of these articles focused on learning systems at multiple levels of the health system. A national learning system requires attention at the organizational, subnational, and national levels guided by the needs of patients, families, and the community. The compass of the national learning system is centred on four cross-cutting themes across the health system: alignment of priorities, systemwide collaboration, transparency and accountability, and knowledge sharing of real-world evidence generated at the point of care.

CONCLUSION

This paper proposes an approach for building a national learning system to improve the quality of health services. Future research is needed to validate the application of these guiding principles and make improvements based on the findings.

Stroke Angel: Effect of Telemedical Prenotification on In-Hospital Delays and Systemic Thrombolysis in Acute Stroke Patients

INTRODUCTION

Door-to-CT scan time (DCT) and door-to-needle time (DNT) are important process measures in acute ischemic stroke (AIS) patients undergoing intravenous thrombolysis (IVT). We examined the impact of a telemedical prenotification by emergency medical service (EMS) (called the "Stroke Angel" program) on DCT and DNT and IVT rate compared to standard of care.

PATIENTS AND METHODS

Two prospective observational studies including AIS patients admitted via EMS from 2011 to 2013 (cohort I; n = 496) and from January 1, 2015 to May 31, 2018 (cohort II; n = 349) were conducted. After cohort I, the 4-Item Stroke Scale and a digital thrombolysis protocol were added. Multivariable logistic and linear regression analysis was performed.

RESULTS

In cohort I, DCT was lower in the intervention group (13 vs. 26 min using standard of care; p < 0.001), but no significant difference in median DNT (35 vs. 39 min; p = 0.24) was observed. In cohort II, a reduction of DCT (8 vs. 15 min; p < 0.001) and DNT (25 vs. 29 min p = 0.003) was observed in the intervention group. Compared to standard of care, the likelihood of DCT ≤10 min or DNT ≤20 min in the intervention group was 2.7 (adjusted odds ratio [aOR] 2.7; 95% CI: 2.1-3.5) and 1.8 (aOR 1.8; 95% CI: 1.1-2.9), respectively. In cohort II, IVT rate was higher (aOR 1.4; 95% CI: 1.1-1.9) in the intervention group.

CONCLUSION

Although the positive effects of Stroke Angel in AIS provided a rationale for implementation in routine care, larger studies of practice implementation will be needed. Using Stroke Angel in the prehospital management of AIS impacts on important process measures of IVT delivery.

Effectiveness of interventions to improve rates of intravenous thrombolysis using behaviour change wheel functions: a systematic review and meta-analysis

BACKGROUND

Despite being one of the few evidence-based treatments for acute ischemic stroke, intravenous thrombolysis has low implementation rates-mainly due to a narrow therapeutic window and the health system changes required to deliver it within the recommended time. This systematic review and meta-analyses explores the differential effectiveness of intervention strategies aimed at improving the rates of intravenous thrombolysis based on the number and type of behaviour change wheel functions employed.

METHOD

The following databases were searched: MEDLINE, EMBASE, PsycINFO, CINAHL and SCOPUS. Multiple authors independently completed study selection and extraction of data. The review included studies that investigated the effects of intervention strategies aimed at improving the rates of intravenous thrombolysis and/or onset-to-needle, onset-to-door and door-to-needle time for thrombolysis in patients with acute ischemic stroke. Interventions were coded according to the behaviour change wheel nomenclature. Study quality was assessed using the QualSyst scoring system for quantitative research methodologies. Random effects meta-analyses were used to examine effectiveness of interventions based on the behaviour change wheel model in improving rates of thrombolysis, while meta-regression was used to examine the association between the number of behaviour change wheel intervention strategies and intervention effectiveness.

RESULTS

Results from 77 studies were included. Five behaviour change wheel interventions, 'Education', 'Persuasion', 'Training', 'Environmental restructuring' and 'Enablement', were found to be employed among the included studies. Effects were similar across all intervention approaches regardless of type or number of behaviour change wheel-based strategies employed. High heterogeneity (I2 > 75%) was observed for all the pooled analyses. Publication bias was also identified.

CONCLUSION

There was no evidence for preferring one type of behaviour change intervention strategy, nor for including multiple strategies in improving thrombolysis rates. However, the study results should be interpreted with caution, as they display high heterogeneity and publication bias.

Use of interrupted time series methods in the evaluation of health system quality improvement interventions: a methodological systematic review

BACKGROUND

When randomisation is not possible, interrupted time series (ITS) design has increasingly been advocated as a more robust design to evaluating health system quality improvement (QI) interventions given its ability to control for common biases in healthcare QI. However, there is a potential risk of producing misleading results when this rather robust design is not used appropriately. We performed a methodological systematic review of the literature to investigate the extent to which the use of ITS has followed best practice standards and recommendations in the evaluation of QI interventions.

METHODS

We searched multiple databases from inception to June 2018 to identify QI intervention studies that were evaluated using ITS. There was no restriction on date, language and participants. Data were synthesised narratively using appropriate descriptive statistics. The risk of bias for ITS studies was assessed using the Cochrane Effective Practice and Organisation of Care standard criteria. The systematic review protocol was registered in PROSPERO (registration number: CRD42018094427).

RESULTS

Of 4061 potential studies and 2028 unique records screened for inclusion, 120 eligible studies assessed eight QI strategies and were from 25 countries. Most studies were published since 2010 (86.7%), reported data using monthly interval (71.4%), used ITS without a control (81%) and modelled data using segmented regression (62.5%). Autocorrelation was considered in 55% of studies, seasonality in 20.8% and non-stationarity in 8.3%. Only 49.2% of studies specified the ITS impact model. The risk of bias was high or very high in 72.5% of included studies and did not change significantly over time.

CONCLUSIONS

The use of ITS in the evaluation of health system QI interventions has increased considerably over the past decade. However, variations in methodological considerations and reporting of ITS in QI remain a concern, warranting a need to develop and reinforce formal reporting guidelines to improve its application in the evaluation of health system QI interventions.

Provincial Door-to-Needle Improvement Initiative Results in Improved Patient Outcomes Across an Entire Population

Background and Purpose:

Improving door-to-needle times (DNTs) for thrombolysis of acute ischemic stroke patients improves outcomes, but participation in DNT improvement initiatives has been mostly limited to larger, academic medical centers with an existing interest in stroke quality improvement. It is not known whether quality improvement initiatives can improve DNT at a population level, including smaller community hospitals. This study aims to determine the effect of a provincial improvement collaborative intervention on improvement of DNT and patient outcomes.

Methods:

A pre post cohort study was conducted over 10 years in the Canadian province of Alberta with 17 designated stroke centers. All ischemic stroke patients who received thrombolysis in the Canadian province of Alberta were included in the study. The quality improvement intervention was an improvement collaborative that involved creation of interdisciplinary teams from each stroke center, participation in 3 workshops and closing celebration, site visits, webinars, and data audit and feedback.

Results:

Two thousand four hundred eighty-eight ischemic stroke patients received thrombolysis in the pre- and postintervention periods (630 in the post period). The mean age was 71 years (SD, 14.6 years), and 46% were women. DNTs were reduced from a median of 70.0 minutes (interquartile range, 51–93) to 39.0 minutes (interquartile range, 27–58) for patients treated per guideline ( P <0.0001). The percentage of patients discharged home from acute care increased from 45.6% to 59.5% ( P <0.0001); the median 90-day home time increased from 43.3 days (interquartile range, 27.3–55.8) to 53.6 days (interquartile range, 36.8–64.6) ( P =0.0015); and the in-hospital mortality decreased from 14.5% to 10.5% ( P =0.0990).

Conclusions:

The improvement collaborative was likely the key contributing factor in reducing DNTs and improving outcomes for ischemic stroke patients across Alberta.

Temporal sustainability of guideline based door-to-needle times for intravenous thrombolysis for acute ischemic stroke

BACKGROUND

Door to needle (DTN) time provides valuable insight into stroke care workflow and is a performance indicator of an acute stroke unit. The aim of the current study was to ascertain whether a door to needle time of less than 60 min can be achieved for intravenous thrombolysis (IVT) in acute ischemic stroke (AIS) and maintained long term in a comprehensive stroke unit.

METHODS

Patients with AIS treated with IVT in the stroke unit formed the study group. Demographic and clinical characteristics including door to imaging (DTI) time, DTN time, and 3 month functional outcome were abstracted. Pairwise comparison was done of yearly median DTI and DTN times with Bonferroni correction.

RESULTS

Over a period of 6 years a total of 196 patients with mean age of 61.5 ± 13.1 years and median (IQR) NIHSS 11 (8-16) underwent IVT. The median DTI time and DTN time over the study period was 15 (12-21) minutes and 40 (30-50) minutes respectively. A total of 90.1%, 69.4% and 29.1% patients received IVT within 60 min, 45 min and 30 min respectively. On pairwise comparison of the median yearly DTN Year 2016 and 2017 were lower compared to most of the earlier years (p < 0.0001). Good functional outcome (mRS ≤ 2) was noted in 68.7% patients at 3 months follow-up.

CONCLUSION

It is possible to sustainably reduce DTN time for IVT in AIS to well below the current 60 min benchmark with hospital system training and teamwork.

Improving Door-to-needle Times in the Treatment of Acute Ischemic Stroke Across a Canadian Province: Methodology

BACKGROUND

Alteplase is a proven medical treatment for acute ischemic stroke; however, the effectiveness of this treatment is highly time dependent. Therefore, it is imperative that hospitals treat acute ischemic stroke patients as quickly as possible. The measure, door-to-needle time, is the time from hospital arrival to when alteplase administration begins.

OBJECTIVE

The goal in the Canadian province of Alberta was to reduce the door-to-needle time to a median of 30 minutes and to increase the percent of patients treated within 60 minutes to 90%.

OVERVIEW OF METHODOLOGY

A modified version of Institute for Healthcare Improvement Breakthrough Series Collaborative was used. All stroke centers self-enrolled into the collaborative after initial contact, and sites created interdisciplinary teams to participate in the Collaborative. Leadership and faculty were highly experienced in quality improvement and acute stroke. There were 3 daylong face-to-face learning sessions that were attended by enrolled teams, which included presentation about the evidence, site presentations to promote cross-site learning, and time to plan changes with their teams. The sites were also supported by site visits, webinars, and data feedback.

Racial disparities in refusal of stroke thrombolysis in Chicago

OBJECTIVE

To evaluate race differences in tissue plasminogen activator (tPA) refusal among eligible patients with acute ischemic stroke (AIS) in Chicago.

METHODS

Using the Get With The Guidelines-Stroke registry data from 15 primary stroke centers between January 2013 and June 2015, we performed a retrospective analysis of patients with AIS presenting to the emergency department within 4.5 hours from symptom onset. Patient or proxy refusal was captured as a reason for nonadministration of tPA to eligible patients in the registry. We assessed whether tPA refusal differed by race using logistic regression.

RESULTS

Among 704 tPA-eligible patients with AIS, tPA was administered to 86.2% (black race, 82.5% vs nonblack race, 89.5%; p < 0.001). Fifty-three (7.5%) tPA refusals were documented. Refusal was more common in black vs nonblack patients (10.6% vs 4.8%; p = 0.004). In multivariable analysis, the following were associated with tPA refusal: black race (adjusted odds ratio [OR] 2.5, 95% confidence interval [CI] 1.3-4.6), self-pay status (adjusted OR 3.23, 95% CI 1.2-8.71), prior stroke (adjusted OR 2.11, 95% CI 1.14-3.90), age (adjusted OR 1.04, 95% CI 1.02-1.07), and NIH Stroke Scale score (adjusted OR 0.94, 95% CI 0.90-0.99).

CONCLUSIONS

Among tPA-eligible patients with AIS in Chicago, over 7% refused tPA. Refusal was more common in black patients and accounted for the apparent lower rates of tPA use in black vs nonblack patients. Further research is needed to understand barriers to consent and overcome race-ethnic disparities in tPA treatment for AIS.