Clinician Perceptions of Robotic Exoskeletons for Locomotor Training After Spinal Cord Injury: A Qualitative Approach

Physiological and perceptual demand of gait training on inpatient physiotherapists

ObjectiveTo describe the physiological and perceptual demand among physiotherapists delivering gait training interventions using usual care and overground robotic exoskeleton approaches for patients with neurological injuries during inpatient rehabilitation.DesignSingle-centre, prospective observational study.SettingInpatient Rehabilitation Hospital.ParticipantsPhysiotherapists trained in neurorehabilitation.InterventionPhysiotherapists conducted two gait training sessions (one usual care and one overground robotic exoskeleton) while physiological and perceptual demand was assessed.Main measuresPhysiological (oxygen consumption, metabolic equivalents and heart rate) and perceptual demand were measured using a wearable metabolic system and the National Aeronautics and Space Administration Task Load Index, respectively.ResultsPhysiotherapists (n = 4) were female, median (min-max) age = 35(34-44) years, non-Hispanic, 50% White, with 11(5-19) years of experience. Physiological demand was lower in overground robotic exoskeleton than usual care in oxygen consumption [13.5(11.3-15.3) versus 16.4(13.5-18.6) millilitres of oxygen/minute/kilogramme of body mass], metabolic equivalents [3.9(3.2-4.4) versus 4.7(3.8-5.3)], average heart rate [111(90-136) versus 119(103-145) beats per minute], peak heart rate [121(101-149) versus 149(116-162) beats per minute] and recovery heart rate [113(88-148) versus 123(105-161) beats per minute]. Perceptual demand was lower in overground robotic exoskeleton than usual care in mental [7(5-16) versus 12(6-17)], physical [10(8-12) versus 16.5(14-21)] and temporal demand [3.5(1-9) versus 12.5(2-16)], performance [5(3-16) versus 11(4-17)], effort [9(6-15) versus 16.5(13-17)] and frustration [3(1-7) versus 5.5(3-8)].ConclusionsDelivery of overground robotic exoskeleton gait training was associated with lower physiological and perceptual demand compared to usual care gait training in patients with neurological injuries during inpatient rehabilitation. Identifying modalities with low demand may reduce physiotherapist burnout and workplace injuries.

Physiotherapists' User Acceptance of a Lower Limb Robotic Exoskeleton in Specialized Rehabilitation: Qualitative Exploratory Study

BACKGROUND

Robotic lower limb exoskeletons have emerged as promising tools in the clinical rehabilitation of patients with lower limb paralysis due to neurological disease, stroke, or spinal cord injury. Identified benefits in gait function rehabilitation include improved gait function, cardiovascular effects, enhanced training quality, patient motivation, and reduced physical and psychological workload for therapists. Despite the identified benefits, the successful adoption of this technology largely depends on therapists' user acceptance.

OBJECTIVE

This study aims to explore physiotherapists' perceptions of using robot-assisted lower-limb gait training in specialized neurological rehabilitation using the unified theory of acceptance and use of technology framework.

METHODS

A qualitative, exploratory research design with a deductive approach was used. Semistructured interviews were conducted with 7 expert physiotherapists in a Norwegian specialized rehabilitation hospital. Data collection and analysis were guided by the unified theory of acceptance and use of technology framework.

RESULTS

The physiotherapists' use of lower limb exoskeletons was greatly influenced by perceived benefits for patients or challenges, such as usability issues, the time required for adjustment to each patient, and the lack of personnel resources to facilitate their use. Thus, perceived usefulness and facilitating conditions (or lack thereof) had a great influence on the physiotherapists' intentions to use and the actual use of the exoskeleton.

CONCLUSIONS

This study identified several factors influencing the physiotherapists' acceptance and integration of the lower limb exoskeleton. Available resources, such as time and personnel, were emphasized as important factors to increase the use of the exoskeleton in specialized rehabilitation. Our findings may inform service providers and engineers in specialized neurological rehabilitation settings.

Barriers and facilitators to exoskeleton use in persons with spinal cord injury: a systematic review

PURPOSE

Exoskeleton can assist individuals with spinal cord injuries (SCI) with simple movements and transform their lives by enhancing strength and mobility. Nonetheless, the current utilization outside of rehabilitation contexts is limited. To promote the widespread adoption of exoskeletons, it is crucial to consider the acceptance of these devices for both rehabilitation and functional purposes. This systematic review aims to identify the barriers or facilitators of the use of lower limbs exoskeletons, thereby providing strategies to improve interventions and increase the adoption of these devices.

METHODS

A comprehensive search was conducted in EMBASE, Web of Science, Scopus, Cochrane, and PubMed. Studies reporting barriers and facilitators of exoskeleton use were included. The studies' quality was assessed using the Mixed Methods Appraisal Tool and undertook a thematic content analysis for papers examining the barriers and facilitators.

RESULTS

Fifteen articles met the inclusion criteria. These revealed various factors that impact the utilization of exoskeletons. Factors like age, engagement in an active lifestyle, and motivation were identified as facilitators, while fear of falling and unfulfilled expectations were recognized as barriers. Physical aspects such as fatigue, neuropathic discomfort, and specific health conditions were found to be barriers.

CONCLUSION

This systematic review provides a comprehensive overview of the barriers and facilitators to the use of exoskeleton technology. There are therefore still challenges to be faced, efforts must be made to improve its design, functionality, and accessibility. By addressing these barriers, exoskeletons can significantly improve the quality of life of people with SCI.

Clinical Uptake of Pediatric Exoskeletons: Pilot Study Using the Consolidated Framework for Implementation Research

OBJECTIVE

While the design and clinical evidence base of robot-assisted gait training devices has been advancing, few studies investigate user experiences with accessing and using such devices in pediatric rehabilitation. This pilot study aims to further the understanding of barriers encountered by clinicians and caregivers when implementing a robot-assisted gait training device.

DESIGN

A qualitative descriptive study was conducted at a local outpatient pediatric therapy center with a robot-assisted gait training exoskeleton. Six caregivers and six clinicians participated in semistructured interviews with brief surveys. The surveys were summarized with descriptive statistics. The interviews were analyzed using directed content analysis guided by the Consolidated Framework for Implementation Research.

RESULTS

The five most mentioned Consolidated Framework for Implementation Research constructs were knowledge and beliefs, relative advantage, child attributes, complexity, and access to knowledge and information. Caregivers experienced obstacles to accessing and trialing robot-assisted gait training devices. Clinicians expressed concerns regarding the feasibility of incorporating robot-assisted gait training into their clinic and preferred lower-tech gait training techniques.

CONCLUSIONS

While some aspects of access and usability may be addressed by device design and technological advancements, overcoming other barriers will require a deeper understanding of the roles of scientific evidence, personal beliefs, and current therapy workflows in the uptake of robotic interventions.

Cost-effectiveness analysis of overground robotic training versus conventional locomotor training in people with spinal cord injury

BACKGROUND

Few, if any estimates of cost-effectiveness for locomotor training strategies following spinal cord injury (SCI) are available. The purpose of this study was to estimate the cost-effectiveness of locomotor training strategies following spinal cord injury (overground robotic locomotor training versus conventional locomotor training) by injury status (complete versus incomplete) using a practice-based cohort.

METHODS

A probabilistic cost-effectiveness analysis was conducted using a prospective, practice-based cohort from four participating Spinal Cord Injury Model System sites. Conventional locomotor training strategies (conventional training) were compared to overground robotic locomotor training (overground robotic training). Conventional locomotor training included treadmill-based training with body weight support, overground training, and stationary robotic systems. The outcome measures included the calculation of quality adjusted life years (QALYs) using the EQ-5D and therapy costs. We estimate cost-effectiveness using the incremental cost utility ratio and present results on the cost-effectiveness plane and on cost-effectiveness acceptability curves.

RESULTS

Participants in the prospective, practice-based cohort with complete EQ-5D data (n = 99) qualified for the analysis. Both conventional training and overground robotic training experienced an improvement in QALYs. Only people with incomplete SCI improved with conventional locomotor training, 0.045 (SD 0.28), and only people with complete SCI improved with overground robotic training, 0.097 (SD 0.20). Costs were lower for conventional training, $1758 (SD $1697) versus overground robotic training $3952 (SD $3989), and lower for those with incomplete versus complete injury. Conventional overground training was more effective and cost less than robotic therapy for people with incomplete SCI. Overground robotic training was more effective and cost more than conventional training for people with complete SCI. The incremental cost utility ratio for overground robotic training for people with complete spinal cord injury was $12,353/QALY.

CONCLUSIONS

The most cost-effective locomotor training strategy for people with SCI differed based on injury completeness. Conventional training was more cost-effective than overground robotic training for people with incomplete SCI. Overground robotic training was more cost-effective than conventional training for people with complete SCI. The effect estimates may be subject to limitations associated with small sample sizes and practice-based evidence methodology. These estimates provide a baseline for future research.

Gait Training with Robotic Exoskeleton Assisted Rehabilitation System in Patients with Incomplete Traumatic and Non-Traumatic Spinal Cord Injury: A Pilot Study and Review of Literature

OBJECTIVE

This pilot study aimed to assess the safety and feasibility of robotic gait training and its' effects on gait parameters in individuals with incomplete motor spinal cord injury-SCI (AIS C and AIS D).

METHODS

The study was conducted in a tertiary research center with indigenously developed Robotic Exoskeleton Assisted Rehabilitation Systems (REARS). Primary outcome measures used were the ten-meter walk test (10MWT), two-minute walk test (2MWT), six-minute walk test (6MWT), the timed up and go test (TUG), the walking index for spinal cord injury II (WISCI II), and the spinal cord independence measure version III (SCIM III) at baseline, 12 sessions, and after 24 sessions (endpoint) of training. At baseline, individuals who could not perform 10MWT, TUG, and 6MWT were grouped in G1 for analysis. Participants in G2 were able to perform all the tests at baseline.

RESULTS

The median (interquartile range [IQR]) age and duration of illness was 41 (24) years and 167 (147) days, respectively. Five out of seven participants had non-traumatic etiology and five were males. After completing training, participants in G1 were able to complete the 10MWT, 6MWT, and TUG, and the mean (SD) scores were 0.2 m/s (0.2), 66.3 m (61.2) and 113.3 s (117.4), respectively. Participants in G2 could perform the TUG test 13.5 s faster at the end of the study (11.9 s vs 25.4 s). The minimum clinically important difference (MCID) for TUG was 10.8 s. In G2, the pre-post training change in mean score of 10MWT and 6MWT was 0.11 m/s and 42 m, respectively; these values approached the MCID for these measures. None of the participants had any injury during training.

CONCLUSIONS

Robotic gait training with REARS is safe and feasible. Such training may lead to an improvement in balance and walking capacity.

A framework for clinical utilization of robotic exoskeletons in rehabilitation

Exoskeletons are externally worn motorized devices that assist with sit-to-stand and walking in individuals with motor and functional impairments. The Food & Drug Administration (FDA) has approved several of these technologies for clinical use however, there is limited evidence to guide optimal utilization in every day clinical practice. With the diversity of technologies & equipment available, it presents a challenge for clinicians to decide which device to use, when to initiate, how to implement these technologies with different patient presentations, and when to wean off the devices. Thus, we present a clinical utilization framework specific to exoskeletons with four aims.

These aims are to assist with clinical decision making of when exoskeleton use is clinically indicated, identification of which device is most appropriate based on patient deficits and device characteristics, providing guidance on dosage parameters within a plan of care and guidance for reflection following utilization. This framework streamlines how clinicians can approach implementation through the synthesis of published evidence with appropriate clinical assessment & device selection to reflection for success and understanding of these innovative & complex technologies.