Type and Timing of Rehabilitation Following Acute and Subacute Spinal Cord Injury: A Systematic Review

Quality and Safety Improvement in Spine Surgery

STUDY DESIGN

Review article.

OBJECTIVES

A narrative review of the literature on the current advances and limitations in quality and safety improvement initiatives in spine surgery.

METHODS

A comprehensive literature search was performed using Ovid MEDLINE focusing on 3 preidentified concepts: (1) quality and safety improvement, (2) reporting of outcomes and adverse events, and (3) prediction model and practice guidelines. The search was conducted under appropriate subject headings and using relevant text words. Articles were screened, and manuscripts relevant to this discussion were included in the narrative review.

RESULTS

Quality and safety improvement remains a major research focus attracting investigators from the global spine community. Multiple databases and registries have been developed for the purpose of generating data and monitoring the progress of quality and safety improvement initiatives. The development of various prediction models and clinical practice guidelines has helped shape the care of spine patients in the modern era. With the reported success of exemplary programs initiated by the Northwestern and Seattle Spine Team, other quality and safety improvement initiatives are anticipated to follow. However, despite these advancements, the reporting metrics for outcomes and adverse events remain heterogeneous in the literature.

CONCLUSION

Constant surveillance and continuous improvement of the quality and safety of spine treatments is imperative in modern health care. Although great advancement has been made, issues with reporting outcomes and adverse events persist, and improvement in this regard is certainly needed.

Selenium and copper status - potential signposts for neurological remission after traumatic spinal cord injury

INTRODUCTION

Traumatic Spinal Cord Injury (TSCI) is a severe incident resulting in loss of motor and sensory function caused by complex pathological mechanisms including massive oxidative stress and extensive inflammatory processes. The essential trace elements selenium (Se) and copper (Cu) play crucial roles as part of the antioxidant defense.

HYPOTHESIS

Remission after TSCI is associated with characteristic dynamics of early changes in serum Cu and Se status.

STUDY DESIGN

Single-center prospective observational study.

PATIENTS AND METHODS

Serum samples from TSCI patients were analyzed (n = 52); 21 recovered and showed a positive abbreviated injury score (AIS) conversion within 3 months (G1), whereas 21 had no remission (G0). Ten subjects with vertebral fractures without neurological impairment served as control (C). Different time points (at admission, and after 4, 9, 12, and 24 h) were analyzed for total serum Se and Cu concentrations by total reflection X-ray fluorescence, and for Selenoprotein P (SELENOP) and Ceruloplasmin (CP) by sandwich ELISA.

RESULTS

At admission, CP and SELENOP concentrations were higher in the remission group (G1) than in the non-remission group (G0). Within 24 h, there were marginal changes in Se, SELENOP, Cu and CP concentrations in the groups of controls (C) and G0. In contrast, these parameters decreased significantly in G1. Binary logistic regression analysis including Cu and Se levels at admission in combination with Se and CP levels after 24 h allowed a prediction for potential remission, with an area under the curve (AUC) of 87.7% (CI: 75.1%-100.0%).

CONCLUSION

These data indicate a strong association between temporal changes of the Se and Cu status and the clinical outcome after TSCI. The dynamics observed may reflect an ongoing redistribution of the trace elements in favor of a better anti-inflammatory response and a more successful neurological regeneration.

Advances in the Rehabilitation of the Spinal Cord-Injured Patient: The Orthopaedic Surgeons' Perspective

Acute traumatic spinal cord injury is a devastating condition affecting 17,700 new patients per year in the United States alone. Typically, orthopaedic surgeons focus on managing the acute surgical aspects of care (eg, surgical spinal decompression and stabilization). However, in the care of these patients, being familiar with how to prognosticate neurologic recovery and manage secondary complications is extremely important. In addition, as an integral part of the multidisciplinary care team, the surgeon should have an awareness of contemporary rehabilitation approaches to maximize function and facilitate reintegration into the community. The purpose of this review article is to provide a surgeon's perspective on these aspects of spinal cord injury care.

Time is spine: a review of translational advances in spinal cord injury

Acute traumatic spinal cord injury (SCI) is a devastating event with far-reaching physical, emotional, and economic consequences for patients, families, and society at large. Timely delivery of specialized care has reduced mortality; however, long-term neurological recovery continues to be limited. In recent years, a number of exciting neuroprotective and regenerative strategies have emerged and have come under active investigation in clinical trials, and several more are coming down the translational pipeline. Among ongoing trials are RISCIS (riluzole), INSPIRE (Neuro-Spinal Scaffold), MASC (minocycline), and SPRING (VX-210). Microstructural MRI techniques have improved our ability to image the injured spinal cord at high resolution. This innovation, combined with serum and cerebrospinal fluid (CSF) analysis, holds the promise of providing a quantitative biomarker readout of spinal cord neural tissue injury, which may improve prognostication and facilitate stratification of patients for enrollment into clinical trials. Given evidence of the effectiveness of early surgical decompression and growing recognition of the concept that "time is spine," infrastructural changes at a systems level are being implemented in many regions around the world to provide a streamlined process for transfer of patients with acute SCI to a specialized unit. With the continued aging of the population, central cord syndrome is soon expected to become the most common form of acute traumatic SCI; characterization of the pathophysiology, natural history, and optimal treatment of these injuries is hence a key public health priority. Collaborative international efforts have led to the development of clinical practice guidelines for traumatic SCI based on robust evaluation of current evidence. The current article provides an in-depth review of progress in SCI, covering the above areas.

Bisperoxovanadium induces M2-type macrophages and promotes functional recovery after spinal cord injury

Macrophages can be polarized towards either a classically activated pro-inflammatory (M1) state, or alternatively towards an activated anti-inflammatory (M2) state. M1 cells are activated by ligands of toll-like receptor (TLR) or interferon (IFN)-γ and have a toxic effect, whereas M2 cells are activated by interleukin (IL)-4, IL-10, and IL-13 and have a regenerative effect in vitro and in vivo. Previously studies have shown that these cells play an important role in the inflammatory responses following spinal cord injury (SCI). Mechanistically, the role of PTEN in the regulation of macrophage polarization has yet to be fully elucidated. In the present study, we first evaluated the expression of PTEN in macrophages after SCI. We found that PTEN expression was accumulated in the macrophages after the SCI surgery. Knock-down of PTEN or inhibition of phospho-PTEN with bpV(pic) in RAW264.7 cells resulted in increased M2 polarization and decreased M1 polarization. In a rat model of SCI, grafts containing bpV(pic) reduced spinal tissue cavitation and promoted locomotor improvement, while combining grafts of bpV(pic) and acellular spinal cord (ASC) scaffolds showed a better effect. Moreover, grafts containing bpV(pic) enhanced M2 polarization and decreased M1 polarization in the macrophages during SCI. Thus, we have established that PTEN is critical for the polarization of macrophages and the functional recovery of SCI. Targeting PTEN enhances the macrophages towards to M2 polarization and promoting the functional recovery in SCI, and this suggest that PTEN may be a future therapeutic target for SCI treatment.

Interventions and cognitive functioning in adults with traumatic spinal cord injuries: a systematic review and meta-analysis

AIM

This research synthesized scientific evidence on the impact of interventions for adults with traumatic spinal cord injury on cognition, to understand if current intervention approaches are appropriate in light of the risk of post-injury cognitive impairments.

METHOD

Medline, Central, Embase, Scopus, PsycINFO and PubMed were searched for intervention in persons with SCI assessing cognition pre- and post-intervention. Study quality was completed using the National Institutes of Health quality assessment tools. Results were grouped by type of intervention. The meta-analysis involved calculation of pooled effect sizes for interventions utilizing the same cognitive measure.

RESULTS

Eleven studies of moderate quality discussed drug therapy, transcutaneous tibial nerve stimulation, diet modification and dietary supplements, and inpatient rehabilitation. Some aspects of cognition were negatively affected by drugs while diet modification and supplement use, and transcutaneous tibial nerve stimulation showed no evidence of a difference in cognitive scores when compared with no intervention. Inpatient rehabilitation revealed a small but beneficial effect, when results of seven studies were pooled.

CONCLUSION

Evidence on the effects of interventions on cognitive functioning in patients with traumatic spinal cord injury is sparse and inconclusive, so work in this area is timely. It is valuable to know not only which interventions are effective for improving cognition, but also how other commonly used interventions, intended to treat other injury sequela, can affect cognition. PROSPERO: CRD42018087238.Implications for rehabilitationHistorically, rehabilitation of patients with traumatic spinal cord injury has targeted physical impairments, with little attention to cognition; this research aimed to understand if current interventions are appropriate in light of the risk of patients' cognitive impairments. Evidence on the effects of drug therapy, diet and dietary supplements interventions on cognitive functioning in traumatic spinal cord injury is sparse and inconclusive.Combining multiple inpatient rehabilitation interventions shows a positive but heterogeneous effect on the cognitive functioning; interventions applied earlier show greater gains.A major challenge for clinicians is to select an outcome measure sensitive to change over time, and to relate the results to patients' change in cognitive abilities with intervention applicationResearch to understand the functional effect of spinal cord injury on the widely distributed networks of the central and autonomic nervous systems subserving cognition, is timely.

Economic impact of traumatic spinal cord injuries in the United States

Individuals having sustained traumatic spinal cord injury (TSCI) in the United States are living longer as compared to historical trends, thanks to an ever-evolving understanding of the nature of this injury. Despite this, multiple barriers to care for TSCI patients remain including variations in government-issued veteran insurance, privatized insurance, and among uninsured individuals. The United States alone experiences 12,000 new TSCI cases every year, many of these are found to occur in a growing proportion of elderly individuals. It is crucial to understand both the short-term direct costs as wells as the long-term rehabilitation costs required by these TSCI patients. The lifetime financial burden for those having sustained a TSCI can be immense for patients, insurance companies, and hospital systems alike. Among those with TSCI, re-hospitalization rates are high, leading to increased healthcare resource utilization within this specific patient population. Costs can quickly balloon into hundreds of thousands of dollars and cause a profound financial burden for these patients. This review article seeks to communicate an understanding of the current financial landscape surrounding TSCI patients. The authors will also examine the costs of acute emergency room surgical care such as American spinal injury association grade, hospital length of stay, as well as the timing delay between injury and surgical decompression. Long-term costs associated with TSCI such as rehabilitation, care of secondary comorbidities, and post-injury employment prospects will be examined as well. These costs will be framed from the patient’s perspective as well as from both the hospital and insurance company’s perspectives. It is hoped a complete understanding as to what makes TSCI such a medically and financially burdensome injury will allow for improved healthcare resource utilization in this population.

Construct validity, test-retest reliability, and the ability to detect change of the Canadian Occupational Performance Measure in a spinal cord injury population

Study design

Cross-sectional study.

Objectives

To examine the construct validity and the ability to detect change, of the Italian version of the Canadian Occupational Performance Measure (COPM) in a spinal cord injury (SCI) population.

Settings

Rehabilitation service of the Paraplegic Center of Ostia, Italy.

Methods

Thirty-nine spinal cord injury participants were recruited. The clinimetric properties of the measure were assessed following international guidelines. Cronbach's alpha and the intraclass correlation coefficient were assessed for internal consistency and test-retest reliability, respectively. Construct validity was evaluated, by calculating correlation between COPM and the Spinal Cord Independence Measure (SCIM) through Pearson's correlation coefficient and Spearman's Rho. The ability to detect change was evaluated on the overall sample.

Results

The COPM was shown to be reliable in a spinal cord injury sample with positive and statistically significant results for Cronbach's alpha (0.89) and ICC (0.99 for the performance subtest and 0.98 for the satisfaction subtest). Correlation coefficients did not show a correlation between the COPM total score and the SCIM. The COPM scores improved significantly during in-patient rehabilitation, moreover the mean change between the start of treatment and the end of the therapy as evaluated with the Wilcoxon signed-rank test was -4.25 points for the performance score and -2.96 points for the satisfaction score.

Conclusions

This study showed that the COPM is a reliable tool for assessing SCI clients' perceived performance of daily activities and their satisfaction with their performance.

Overview of Systematic Reviews of Aerobic Fitness and Muscle Strength Training after Spinal Cord Injury

The number of systematic reviews on the effects of exercise on aerobic fitness and muscle strength in people with spinal cord injury (SCI) has recently increased. However, the results of some of these reviews are inconclusive or inconsistent. To strengthen recommendations, this overview was undertaken to assimilate evidence about the effectiveness of different types of physical activities, exercises, and therapeutic interventions for improving aerobic fitness and muscle strength in people with SCI. Cochrane Overview of reviews methods were adopted to undertake this overview. An online search was conducted in August 2018 on eight databases based on predefined search criteria. Potential systematic reviews were screened, selected, and assessed on methodological quality by two independent authors, and discussed and resolved with a third author, when necessary. Only systematic reviews published in the English language were included. The protocol was registered on PROSPERO. Overall, 16 systematic reviews were included (aerobic fitness, n = 10; muscle strength, n = 15). For all 16 reviews, the quality of evidence was rated as "critically low." Despite low evidence, this overview strengthens the existing guidelines for people with SCI, providing specific advice on exercise domains (types, intensities, frequency, and duration) for improving aerobic fitness and muscle strength. The evidence from this overview suggests that ergometry training with/without additional therapeutic interventions (20 min, moderate to vigorous intensity, twice weekly for 6 weeks) may improve aerobic fitness; similarly, resistance training with/without additional therapeutic interventions (three sets of 8-10 repetitions, moderate to vigorous intensity, twice weekly for 6 weeks) may improve muscle strength.

A comparison of patients managed in specialist versus non-specialist inpatient rehabilitation units in Australia

Aim: To compare the rehabilitation of patients with brain and spinal cord injury in specialist rehabilitation units and non-specialist rehabilitation units in Australia over a 10-year period.Method: A retrospective cohort study design was used. Epidemiological descriptive analysis was used to examine inpatient rehabilitation data held in the Australasian Rehabilitation Outcomes Centre Registry Database at four discrete time points: 2007, 2010, 2013 and 2016. Data sets included patient demographics, length of stay and the Functional Independence Measure. Data sets were examined for differences between specialist and non-specialist rehabilitation units.Results: Over the 10-year study period, compared to patients admitted to non-specialist rehabilitation units patients admitted to specialist rehabilitation units: (1) were younger and more likely to be male; (2) had a longer time between onset of illness/injury and rehabilitation admission; (3) had a longer median rehabilitation length of stay; (4) had a higher burden of care on admission to rehabilitation; however (5) had a greater functional gain. Patients in specialist rehabilitation units had a lower relative functional efficiency per day of rehabilitation, but higher percentage of Functional Independence Measure gain. In 2016, 66% of brain injury and 51% of spinal cord injury patients were not rehabilitated in specialist rehabilitation units.Conclusion: There are differences in the characteristics of patients admitted to specialist versus non-specialist rehabilitation units. Patients admitted to specialist rehabilitation units have greater functional gain. A noteworthy proportion of brain and spinal cord injury patients are not being rehabilitated in specialist rehabilitation units, particularly patients with non-traumatic injuries.Implications for rehabilitationPatients with a brain or spinal cord injury rehabilitated in specialist rehabilitation units achieve a greater functional gain than those in non-specialist units.Development of best practice admission guidelines would better enable the right care for the right patient in the right setting at the right time.There is a need for longitudinal examination of patient outcomes to better understand the long-term benefits of being rehabilitated in specialist rehabilitation units compared to non-specialist rehabilitation units.

Rehabilitation following spinal cord injury: how animal models can help our understanding of exercise-induced neuroplasticity

Spinal cord injury is a devastating condition that is followed by long and often unsuccessful recovery after trauma. The state of the art approach to manage paralysis and concomitant impairments is rehabilitation, which is the only strategy that has proven to be effective and beneficial for the patients over the last decades. How rehabilitation influences the remodeling of spinal axonal connections in patients is important to understand, in order to better target these changes and define the optimal timing and onset of training. While clinically the answers to these questions remain difficult to obtain, rodent models of rehabilitation like bicycling, treadmill training, swimming, enriched environments or wheel running that mimic clinical rehabilitation can be helpful to reveal the axonal changes underlying motor recovery. This review will focus on the different animal models of spinal cord injury rehabilitation and the underlying changes in neuronal networks that are improved by exercise and rehabilitation.