Michael Pollack

An Enriched Environment Improves Sensorimotor Function Post-Ischemic Stroke

Objective. An enriched environment (EE) refers to conditions that facilitate or enhance sensory, cognitive, motor, and social stimulation relative to standard (laboratory) conditions. Despite numerous published studies investigating this concept in animal stroke models, there is still debate around its efficacy. The authors performed a systematic review and meta-analysis to determine the efficacy of an EE on neurobehavioral scores, learning, infarct size, and mortality in animal models of ischemic stroke. Methods. Systematic review of controlled studies of the use of an EE in experimental stroke was conducted. Data extracted were analyzed using weighted mean difference meta-analysis. For pooled tests of neurobehavioral scores, a random effects standardized method was used. Results. Animals recovering in an EE poststroke had mean neurobehavioral scores 0.9 standard deviations (95% confidence interval [CI] = 0.5-1.3; P < .001) above the mean scores of animals recovering in standard conditions and showed a trend toward improvement in learning (25.1% improvement; 95% CI = 3.7-46.6; P = .02). There was no significant increase in death. Animals exposed to an EE had 8.0% larger infarcts than control animals (95% CI = 1.8-14.1; P = .015). Conclusions. The results indicate significant improvements in sensorimotor function with EE poststroke but suggest a small increase in infarct volume. Clarification of the underlying mechanisms requires further study but should not overshadow the observed functional improvements and their application to clinical trials during stroke rehabilitation.

An enriched environment increases activity in stroke patients undergoing rehabilitation in a mixed rehabilitation unit: a pilot non-randomized controlled trial

Abstract Purpose: An enriched environment (EE) facilitates physical, cognitive and social activity in animal models of stroke. The aim of this pilot study was to determine whether enriching the environment of a mixed rehabilitation unit increased stroke patient activity. Methods: A non- randomized controlled trial was conducted. Direct observation was used to determine the difference in change in physical, cognitive, social or any activity over 2 weeks in patients exposed to an enriched versus non-enriched environment. Results: Stroke patients in the EE (n = 15) were 1.2 (95% CI 1.0–1.4) times more likely to be engaged in any activity compared with those in a non-enriched environment (n = 14). They were 1.7 (95% CI 1.1–2.5) times more likely to be engaged in cognitive activities, 1.2 (95% CI 1.0–1.5) times more likely to be engaged in social activities, 0.7 (95% CI 0.6–0.9) times as likely to be inactive and alone and 0.5 (95% CI 0.4–0.7) times as likely to be asleep than patients without enrichment. Conclusions: This preliminary trial suggests that the comprehensive model of enrichment developed for use in a rehabilitation unit was effective in increasing activity in stroke patients and reducing time spent inactive and alone. Implications for Rehabilitation Stroke patients within a mixed rehabilitation unit who are exposed to an enriched environment (EE) are more likely to be engaged in activity than those not exposed to the enriched environment. Patients in enriched conditions are less likely to be “inactive and alone” or asleep during waking hours. These results suggest a comprehensive model of enrichment is effective in increasing activity levels.

Adherence to clinical guidelines improves patient outcomes in Australian audit of stroke rehabilitation practice

OBJECTIVE To study the correlation between adherence to recommended management and good recovery outcomes in an Australian cohort of inpatients receiving rehabilitation. DESIGN Processes of care were audited and included those recommended in the Australian Clinical Guidelines for Stroke Rehabilitation and Recovery. SETTING National audit data from 68 rehabilitation units were used, with each hospital contributing up to 40 consecutive cases. PARTICIPANTS Not applicable. INTERVENTIONS Not applicable. MAIN OUTCOME MEASURES Discharged home or an increase of greater than or equal to 22 in FIM scores between admission and discharge. Multivariable logistic regression models controlling for patient clustering were used to assess the associations between adherence to recommended management and recovery outcomes (dependent variables). RESULTS Hospitals contributed 2119 patients (median age 75y, 53% men). We found that rehabilitation units providing evidence-based management (eg, treatment for sensorimotor impairment 38%, hypertonicity 56%, mobility 94%, and home assessments 71%) were more likely to provide better recovery outcomes for people with stroke. A discharge FIM score of 100 was clinically relevant and was strongly correlated with whether or not a patient was discharged home. We found very good correlation between admission and discharge FIM scores in stroke rehabilitation. CONCLUSIONS This is one of the first study comparing adherence to recommended management in Australian rehabilitation units and stroke recovery outcomes based on national audit data. Novel findings include the significance of an FIM score between 80 and 100 and the clinical significance of various management processes.

A multidisciplinary group programme in rural settings for community-dwelling chronic stroke survivors and their carers: a pilot randomized controlled trial

Objectives: To explore whether a group programme for community-dwelling chronic stroke survivors and their carers is feasible in rural settings; to measure the impact of the programme on health-related quality of life and functional performance; and to determine if any benefits gained are maintained. Design: Randomized, assessor blind, cross-over, controlled trial. Setting: Rural outpatient. Subjects: Twenty-five community-dwelling, chronic stroke survivors and 17 carers of participant stroke survivors. Intervention: The intervention group undertook a once-a-week, seven-week group programme combining physical activity, education, self-management principles and a ‘healthy options’ morning tea. At completion, the control group crossed over to receive the intervention. Main measures: Stroke Impact Scale (stroke survivors), Health Impact Scale (carers), Six Minute Walk Test, Timed Up and Go, Caregiver Strain Index. Results: There were insufficient participants for results to reach statistical significance. However between-group trends favoured the intervention group in the majority of outcome measures for stroke survivors and carers. The majority of measures remained above baseline at 12 weeks post programme for stroke survivor participants. The programme was well attended. Of the seven sessions all participants attended four or more and 88% attended six or seven sessions. Conclusions: This novel programme incorporating physical activity, education and social interaction proved feasible to undertake by a stroke-specific multidisciplinary team in three rural Australian settings. This programme may improve and maintain health-related quality of life and physical functioning for chronic stroke survivors and their carers and warrants further investigation.

Access and participation in the community: a prospective qualitative study of driving post-stroke

Purpose: Loss of role as a driver significantly affects community participation; therefore, we aimed to explore the impact of driving issues post-stroke in community-dwelling stroke survivors. Methods: A longitudinal qualitative study of community-dwelling stroke survivors, using semi-structured interviews. Results: Twenty-two participants took part in 84 interviews over a 1-year period post-stroke. The majority of participants was independent and experienced few major depressive symptoms. ages ranged from 50 to 92 years. Emergent key themes included impact on quality of life, personal impacts, change to role performance and knowledge. Participants received inconsistent advice regarding return to driving. Confidence and availability determined public transport use. Conclusions: Driving advice should be standard practice prior to discharge. Allied health professionals can play an essential role in interventions addressing community participation, driver re-training and alternative transport use. Therapists have an important role in assisting stroke survivors to work through feelings of loss and in providing education concerning new skills to support this life transition. Implications for Rehabilitation Issues regarding driving are of major importance to stroke survivors. Allied health professionals can play a significant role in providing education and training regarding return to driving and alternate transport options. Allied health professionals have an important role in assisting stroke survivors to transition to a life without driving by working through feelings of loss and by providing education concerning new skills to support this life transition.

Comprehensive stroke units: a review of comparative evidence and experience

Background Stroke unit care offers significant benefits in survival and dependency when compared to general medical ward. Most stroke units are either acute or rehabilitation, but comprehensive (combined acute and rehabilitation) model (comprehensive stroke unit) is less common. Aim To examine different levels of evidence of comprehensive stroke unit compared to other organized inpatient stroke care and share local experience of comprehensive stroke units. Methods Cochrane Library and Medline (1980 to December 2010) review of English language articles comparing stroke units to alternative forms of stroke care delivery, different types of stroke unit models, and differences in processes of care within different stroke unit models. Different levels of comparative evidence of comprehensive stroke units to other models of stroke units are collected. Results There are no randomized controlled trials directly comparing comprehensive stroke units to other stroke unit models (either acute or rehabilitation). Comprehensive stroke units are associated with reduced length of stay and greatest reduction in combined death and dependency in a meta-analysis study when compared to other stroke unit models. Comprehensive stroke units also have better length of stay and functional outcome when compared to acute or rehabilitation stroke unit models in a cross-sectional study, and better length of stay in a ‘before-and-after’ comparative study. Components of stroke unit care that improve outcome are multifactorial and most probably include early mobilization. A comprehensive stroke unit model has been successfully implemented in metropolitan and rural hospital settings. Conclusions Comprehensive stroke units are associated with reductions in length of stay and combined death and dependency and improved functional outcomes compared to other stroke unit models. A comprehensive stroke unit model is worth considering as the preferred model of stroke unit care in the planning and delivery of metropolitan and rural stroke services.

Trajectories of Psychological Distress After Stroke

PURPOSE There has been little exploration of the distinct trajectories of psychological distress after stroke and the factors that predict recovery from distress. These trajectories may assist primary care physicians by providing insight into disease onset, progression, and resolution and may be a useful way to conceptualize and understand the pattern of psychological morbidity in stroke over time. We undertook a longitudinal qualitative study to explore poststroke psychological trajectories METHODS The primary data collection method was semistructured interviews with community-dwelling stroke survivors in metropolitan Newcastle, New South Wales, Australia. Our sample included 23 participants (12 men, 10 women; age range 37 to 94 years) discharged from a tertiary referral hospital after a stroke; these participants subsequently participated in a total of 106 interviews over 12 months. Qualitative outcomes were participants’ perceptions at baseline, 3, 6, 9, and 12 months. Thematic saturation was achieved. RESULTS Most participants were male (54%) and had a partial anterior circulation infarction stroke subtype (57%). Four different longitudinal trajectories were identified: resilience (n = 5); ongoing crisis (n = 5), emergent mood disturbance (n = 3), and recovery from mood disturbance (n = 10). Recovery from mood disturbance was facilitated by gains in independence and self-esteem and by having an internal health locus of control. CONCLUSIONS Stroke survivors experienced a variety of psychological trajectories. Identifying distinct trajectories of psychological morbidity may help primary care physicians develop appropriately timed interventions to promote better mental health. Interventions require implementation over a longer duration than the current outpatient services that, in Australia, are typically provided in the first few months after stroke.

Exploring the experience of post-stroke fatigue in community dwelling stroke survivors: a prospective qualitative study

Purpose: To explore the experience of post-stroke fatigue in community-dwelling stroke survivors with and without post-stroke mood disturbance within one year of stroke. Methods: This was a prospective qualitative cohort study including semistructured interviews undertaken at baseline (stroke onset), 3, 6, 9 and 12 months in 23 stroke survivors; eight single interviews were held with “supplementary” participants. Qualitative data analysis involved an inductive thematic approach using a process of constant comparison. Results: Thirty-one participants (17 men, 14 women; age range 37–94 years) took part in 122 interviews. The majority of participants was independent and experienced few major depressive symptoms. Three trajectories emerged regarding the participants’ experiences of fatigue including experience of fatigue, coping strategies and knowledge. Conclusions: The results of this study suggest that in spite of reasonable objective physical recovery post-stroke, fatigue in community-dwelling stroke survivors may be disabling. The use of qualitative methodology was sensitive in identifying the factors that play a role in the experience of fatigue. The essential role of health professionals in this context is to provide support and education regarding fatigue and to promote participation after stroke in therapy programs. Routine practice for stroke services should include fatigue advice prior to discharge. Implications for Rehabilitation Issues regarding fatigue are of major importance to stroke survivors. Allied health can play a significant role in providing training regarding management of fatigue symptoms to assist maintain community participation. Allied health professions have an important role in assisting stroke survivors to transition through feelings of loss and in providing education concerning new skills to assist manage symptoms of fatigue post-stroke.

Physical, cognitive and social activity levels of stroke patients undergoing rehabilitation within a mixed rehabilitation unit

Objective: To determine physical, cognitive and social activity levels of stroke patients undergoing rehabilitation, and whether these changed over time. Design: Observational study using behavioural mapping techniques to record patient activity over 12 hours on one weekday and one weekend day at baseline (week 1) and again two weeks later (week 2). Setting: A 20-bed mixed rehabilitation unit. Subjects: Fourteen stroke patients. Interventions: None. Main measures: Percentage of day spent in any activity or physical, cognitive and social activities. Level of independence using the Functional Independence Measure (FIM) and mood using the Patient Health Questionniare-9 (PHQ-9). Results: The stroke patients performed any activity for 49%, social activity for 32%, physical activity for 23% and cognitive activity for 4% of the day. Two weeks later, physical activity levels had increased by 4% (95% confidence interval (CI) 1 to 8), but levels of any activity or social and cognitive activities had not changed significantly. There was a significant: (i) positive correlation between change in physical activity and change in FIM score (r = 0.80), and (ii) negative correlation between change in social activity and change in PHQ-9 score (r = −0.72). The majority of activity was performed by the bedside (37%), and most physical (47%) and cognitive (54%) activities performed when alone. Patients undertook 5% (95% CI 2 to 9) less physical activity on the weekends compared with the weekdays. Conclusions: Levels of physical, cognitive and social activity of stroke patients were low and remained so even though level of independence and mood improved. These findings suggest the need to explore strategies to stimulate activity within rehabilitation environments.

Factors Associated With 28-Day Hospital Readmission After Stroke in Australia

Background and Purpose— Understanding the factors that contribute to early readmission after discharge following stroke is limited. We aimed to describe the factors associated with 28-day readmission after hospitalization for stroke. Methods— Factors associated with readmission were classified from the medical record standardized audits of 50 to 100 consecutively admitted patients with stroke from 35 Australian hospitals during multiple time periods (2000–2010). Factors were compared between patients readmitted and not readmitted after stroke hospitalization (n=43) grouped using 5 categories: patient characteristics (n=16; eg, age), clinical processes of care (n=13; eg, admitted into a stroke unit), social circumstances (n=3; eg, living home alone prior), health system (n=6; eg, location of hospital), and health outcome (n=5; eg, length of stay). Multilevel logistic regression modeling was used to examine the association with these independent factors selected if statistical significance P<0.15 or if considered clinically important and readmission status. Results— Among 3328 patients, 6.5% were readmitted within 28 days (mean age, 75; 48% female; 92% ischemic). After bivariate analyses 14/43 factors from 4/5 categories were associated with readmission after hospitalization for stroke. Two factors from patient and health outcome categories remained independently associated with readmission after multivariable analyses. These were dependent premorbid functional status (adjusted odds ratio, 1.87; 95% confidence interval, 1.25–2.81) and having a severe adverse event during the initial hospitalization for stroke (adjusted odds ratio, 2.81; 95% confidence interval, 1.55–5.12). Conclusions— This is the first study to comprehensively evaluate factors associated with 28-day readmission after stroke. The factors associated with 28-day readmission are diverse and include potentially modifiable and nonmodifiable factors.