Anthony Gelis

Pressure ulcer risk factors in persons with spinal cord injury Part 2: the chronic stage

Introduction:Pressure ulcers (PUs) are a common complication following spinal cord injury (SCI). Prevalence for persons in the chronic SCI stage varies between 15 and 30%. The risk assessment scales used nowadays were designed on pathophysiological concepts and are not SCI-specific. Recently, an epidemiological approach to PU risk factors has been proposed for designing an SCI-specific assessment tool. The first results seem quite disappointing, probably because of the level of evidence of the risk factors used.Objective:To determine PU risk factors correlated to the chronic stage of SCI.Materials and methods:Systematic review of the literature.Results:There are several PU risk factors for chronic SCI stage: socio-demographics, neurological, medical or behavioral. The level of evidence varies: it is quite high for the socio-demographics and neurological factors and low for behavioral factors.Discussion and conclusion:Behavioral risk factors (relieving the pressure, careful skin monitoring, smoking) are probably the ones for which a preventive strategy can be established. It is important to develop specific assessment tools for these behavioral risk factors to determine their relevance and evaluate the effect of therapeutic educational programs on persons with SCI.

Pressure ulcer risk factors in persons with SCI: Part I: Acute and rehabilitation stages.

Background:Pressure ulcers (PUs) are a common complication following a spinal-cord injury (SCI). Good prevention requires identifying the individuals at risk for developing PUs. Risk assessment scales used nowadays were designed on pathophysiological concepts and are not SCI-specific. Recently, an epidemiological approach to PU risk factors has been proposed to design an SCI-specific assessment tool. The first results seem quite disappointing, probably becuase of the level of evidence of the risk factors used.Objective:To determine PU risk factors correlated to the patients with SCI, medical care management during the acute as well as in the rehabilitation and chronic stages. This first part focuses on identifying the risk factors during the acute and rehabilitation stages.Materials and methods:Systematic review of the literature.Results:Six studies met our inclusion criteria. The risk factors during the acute stage of an SCI are essentially linked to care management and treatment modalities. There is insufficient evidence to make a recommendation on medical risk factors, except for low blood pressure on admission to the Emergency Room, with a moderate level of evidence. Regarding the rehabilitation stage, no study was deemed relevant.Discussion and conclusions:Additional observational studies are needed, for both the acute and rehabilitation stages, to improve this level of evidence. However, this systematic review unveiled the need for a carefully assessed t care management and the related practices, especially during the acute stage of an SCI.

Painful camptocormia: the relevance of shaking your patient’s hand

Camptocormia is an abnormal posture with marked flexion of thoracolumbar spine that abates in the recumbent position. Camptocormia has been described in various neurological (Parkinsonism), muscular (myopathy), psychogenic or orthopedic disorders. There are several hypotheses that can explain this impaired posture but they are usually related to the concomitant pathologies. We report the first case of a patient with confirmed myotonic dystrophy addressed to our medical center for impaired posture who underwent extensive medical exams and explorations because of a myotonic hand. Axial weakness and muscle atrophy, validated by CT-scan imaging, are discussed independent of the concomitant pathology (Parkinson, myopathy).

Evaluating self-reported pressure ulcer prevention measures in persons with spinal cord injury using the revised Skin Management Needs Assessment Checklist: reliability study.

Study design:Cross-cultural adaptation and reliability study.Objective:To translate, evaluate the reliability and cross-culturally adapt the Skin Management Needs Assessment Checklist (SMnac), a questionnaire evaluating the knowledge on pressure ulcer (PU) prevention measures in persons with spinal cord injury (SCI).Subjects:138 persons with SCI, mean age 45.9 years, mean time since injury 94 months.Material and method:The study was carried out in two stages. First, the questionnaire went through a forward–backward translation process and was cross-culturally adapted, according to a validated methodology for self-reported measures. Then, the test–retest reliability was evaluated on a population of persons with SCIResults:The standardized back-translation and cross-cultural adaptation led to the revised Smack grid, with the addition of seven items representing an update of PU prevention measures. The reliability was excellent (intraclass correlation coefficient: 0.899).Conclusion:The revised SMnac is an adaptation of the SMnac, including therapeutic education frameworks and the latest PU prevention practices. It appears to be a reliable tool for assessing the knowledge and benefits of PU prevention in persons with SCI. Further studies are needed to explore its validity and responsiveness to change.

A Novel EMG Interface for Individuals With Tetraplegia to Pilot Robot Hand Grasping

This paper introduces a new human-machine interface for individuals with tetraplegia. We investigated the feasibility of piloting an assistive device by processing supra-lesional muscle responses online. The ability to voluntarily contract a set of selected muscles was assessed in five spinal cord-injured subjects through electromyographic (EMG) analysis. Two subjects were also asked to use the EMG interface to control palmar and lateral grasping of a robot hand. The use of different muscles and control modalities was also assessed. These preliminary results open the way to new interface solutions for high-level spinal cord-injured patients.

Exploring selective neural electrical stimulation for upper limb function restoration

This article introduces a new approach of selective neural electrical stimulation of the upper limb nerves. Median and radial nerves of individuals with tetraplegia are stimulated via a multipolar cuff electrode to elicit movements of wrist and hand in acute conditions during a surgical intervention. Various configurations corresponding to various combinations of a 12-poles cuff electrode contacts are tested. Video recording and electromyographic (EMG) signals recorded via sterile surface electrodes are used to evaluate the selectivity of each stimulation configuration in terms of activated muscles. In this abstract we introduce the protocol and preliminary results will be presented during the conference.

Validity and internal consistency of the French version of the revised Skin Management Needs Assessment Checklist in people with spinal cord injury

Study designCross-sectional psychometrics study.ObjectivesTo determine the construct validity and internal consistency of the revised Skin Management Needs Assessment Checklist (revised SMnac).SettingSix spinal cord rehabilitation centers.MethodsOne-hundred and thirty-two community-dwelling individuals with spinal cord injury (SCI) were included. Construct validity was assessed by a Spearman’s rank correlation coefficient between the revised SMnac and several questionnaires: Rosenberg Self-Esteem Scale, Ways of Coping Questionnaire, Hospital Anxiety and Depression Scale (HADS), Braden scale; or clinical variables: educational level, presence of a pressure ulcer (PU), history of multiple PUs, time since injury, and pain.ResultsThe study evidenced construct validity with a fair to moderate correlation coefficient between the revised SMnac and Rosenberg scale (rs = 0.25; p = 0.03), active coping (rs = 0.29; p = 0.001), HADS (rs = -0.43; p < 0.0001), and time since injury (rs = 0.49; p < 0.0001). The presence of PU and history of multiple PUs were strongly correlated with the revised SMnac score (respectively, p = 0.01 and 0.001). Internal consistency was excellent (α = 0.907).ConclusionThese results show that the revised SMnac is a valid tool to assess PU self-management in individuals with SCI. Further studies are needed to assess the revised SMnac’s responsiveness to change.

Analgesic gas for rehabilitation of frozen shoulder: Protocol for a randomized controlled trial

BACKGROUND There is little evidence regarding the best way to treat adhesive capsulitis. Physical therapy can reduce pain and improve function and range of motion. However, we lack clear indications on the regimen, techniques or intensity of physical therapy to achieve better results. Intensive physical therapy seems to be confined to the later stages of adhesive capsulitis (chronic stage) given that rehabilitation-induced pain could worsen the outcomes. Here we describe a protocol for a study comparing the efficacy of a standardized program of intensive mobilization under analgesic gas to a similar program under placebo gas and questioning the impact of pain. METHOD/DESIGN A randomized, double-blind, multicenter study - the MEOPA Trial - was designed to include adults with strictly defined clinical adhesive capsulitis for a 14-day intensive physical rehabilitation program under an equimolar mixture of oxygen and nitrous oxide or sham gas administration. Efficacy will be assessed by the Constant-Murley score. Data for secondary criteria including pain, disability, quality of life and perceived efficacy by the patient or physiotherapist will be collected over 6 months. DISCUSSION This randomized controlled trial has been designed to test the effectiveness of intensive physical therapy under a simple and safe analgesic method. This study will also address the effect of pain during rehabilitation in adhesive capsulitis. Furthermore, results from the 6-month multidimensional follow-up of painful mobilization for this condition could be extrapolated to other musculoskeletal conditions. TRIAL REGISTRATION ClinicalTrials.gov No. NCT01087229.

Risk factors of pelvic pressure ulcer recurrence after primary 1 skin flap surgery in people with spinal cord injury

BACKGROUND Flap surgery for deep pelvic pressure ulcers (PPUs) has been found effective, but the recurrence rate remains high and few risk factors have been identified. OBJECTIVE We evaluated risk factors for PU recurrence after primary flap surgery in people with spinal cord injury (SCI). PATIENTS AND METHODS This observational retrospective study based on medical charts included all individuals with SCI who underwent primary flap surgery for a PPU in the Hérault department in France between 2006 and 2014. Overall, 100 biomedical, psychological, socioeconomic and care management factors were studied. The primary outcome was PPU recurrence (surgical site and/or other pelvic site). The secondary outcome was recurrence at the surgical site. Cox proportional hazards regression was used to determine associated factors, estimating hazard ratios (HRs) and 95% confidence intervals (CIs). RESULTS We included 85 patients. Half had a PPU recurrence, and in one-third, the recurrence was at the surgical site. On multivariate analysis, global PPU recurrence was associated with colostomy (HR=2.79) and living with a partner (HR=2.29). Non-traumatic SCI and sacral wound were associated with PPU recurrence (HR=3.39, HR=0.48) and recurrence at the surgical site (HR=3.3, HR=0.3). CONCLUSION Risk factors of PPU recurrence are based on both biomedical and social models. After primary flap surgery, the risk of recurrence justifies regular follow-up and strict monitoring.

Real-Time Closed-Loop Functional Electrical Stimulation Control of Muscle Activation with Evoked Electromyography Feedback for Spinal Cord Injured Patients

Functional electrical stimulation (FES) is a neuroprosthetic technique to help restore motor function of spinal cord-injured (SCI) patients. Through delivery of electrical pulses to muscles of motor-impaired subjects, FES is able to artificially induce their muscle contractions. Evoked electromyography (eEMG) is used to record such FES-induced electrical muscle activity and presents a form of [Formula: see text]-wave. In order to monitor electrical muscle activity under stimulation and ensure safe stimulation configurations, closed-loop FES control with eEMG feedback is needed to be developed for SCI patients who lose their voluntary muscle contraction ability. This work proposes a closed-loop FES system for real-time control of muscle activation on the triceps surae and tibialis muscle groups through online modulating pulse width (PW) of electrical stimulus. Subject-specific time-variant muscle responses under FES are explicitly reflected by muscle excitation model, which is described by Hammerstein system with its input and output being, respectively, PW and eEMG. Model predictive control is adopted to compute the PW based on muscle excitation model which can online update its parameters. Four muscle activation patterns are provided as desired control references to validate the proposed closed-loop FES control paradigm. Real-time experimental results on three able-bodied subjects and five SCI patients in clinical environment show promising performances of tracking the aforementioned reference muscle activation patterns based on the proposed closed-loop FES control scheme.