Active clinical trials for "Quadriplegia"

This study was intended to evaluate a new assistive neuro-technology, known as the Tongue Drive System (TDS), by its potential end-users, i.e. individuals with severe disabilities, who are the best experts for indicating the benefits and possible shortcomings of any new ANT. Our goal is to assess the acceptability and usability of the TDS for various tasks that are important in daily lives of these individuals, such as computer access, wheeled mobility, and environmental control.

Breathlessness is an extremely common and uncomfortable symptom that is reported in more than two-thirds of persons with tetraplegia. This disordered pulmonary function is due to respiratory muscle paralysis or to sympathetic denervation results in a restrictive impairment and airway hyperreactivity, respectively. These restrictive and obstructive dysfunctions have been associated with the symptom of breathlessness. However, mechanisms contributing to dyspnea in persons who have tetraplegia are not well understood. It has been demonstrated that persons with tetraplegia have an increased prevalence of breathlessness and may have an altered breathing pattern. The purpose of this study is to determine the breathing pattern at rest and measure the changes in breathing after a bronchodilator treatment (a medicine commonly used to treat asthma that relaxes and opens up airways). The determination of breathing pattern is done by measuring the movements in the chest wall while breathing. This design will elucidate differences in breathing patterns between those with tetraplegia and controls, as well as demonstrate the effect of bronchodilatation on motor drive and timing. Knowledge of the intraindividual variability and mean values of the components of the breathing pattern will improve our understanding of breathlessness in these individuals.

A repetitive, non-invasive brain stimulation technique referred to as theta burst stimulation can modulate corticomotor excitability and therefore has great rehabilitative potential for individuals with neurologic deficits, including individuals with spinal cord injury (SCI). In particular, intermittent theta burst stimulation (iTBS) can increase corticomotor excitability and may be a useful adjunct to physical rehabilitation to promote motor re-education after upper limb reconstruction in individuals with tetraplegia. Upper limb reconstruction involves surgical transfer of a non-paralyzed tendon or nerve with a redundant or less important function to perform a more critical function. Upper limb reconstruction is intended to help individuals achieve their goals related to activities of daily living and independence in the community. Outcomes after reconstruction are variable and depend largely on the efficacy of motor re-education of the transferred muscle to perform a new function. The long-term goal of our research is to determine whether iTBS combined with physical rehabilitation can improve motor re-education after reconstruction. As a first step, the purpose of this proposal is to determine the effect of iTBS on corticomotor excitability of proximal muscles in nonimpaired individuals and two groups of individuals with tetraplegia: individuals with and without upper limb reconstruction.

Previously it was observed that individuals with tetraplegia have reduced baseline airway caliber and exhibit non-specific airway hyperresponsiveness (AHR). In persons with tetraplegia we have suggested that this is due to overriding cholinergic airway tone. In asthma, the mechanisms underlying bronchoconstriction and AHR are more closely tied to airway inflammation. Whether AHR in tetraplegia is also related to chronic airway inflammation is unknown. Recently, a non-invasive technique for assessing airway inflammation has been established in asthma that involves measurement of nitric oxide (NO) concentrations (FeNO) in expired air. FeNO is elevated in asthma likely due to excess NO production by inflammatory cells within the airway Measurement of FeNO in persons with tetraplegia would help in assessing the role of airway inflammation in this population. This may have therapeutic significance in such individuals. NO in the lung is felt to be the principal inhibitory neurotransmitter of the non-adrenergic, non-cholinergic (NANC) system. It is thought that inhalation of NO has no effect on airway tone in healthy individuals but reduces methacholine responsiveness while having weak direct bronchodilatory effect in asthmatics. The primary purpose of this study is to determine the levels of exhaled NO (FeNO) in individuals with chronic cervical spinal cord injury (SCI), and to compare them with those obtained in age and sex matched able-bodied individuals and subjects with stable mild to moderate asthma. If the FeNO levels are high and comparable to those found in asthmatic subjects, this will imply the role of chronic inflammation in reduced baseline airway caliber and non-specific airway hyper-responsiveness (AHR) exhibited by individuals with chronic cervical SCI. If the FeNO levels are comparable with those found in able-bodied controls, this will support our previous statement that unopposed cholinergic innervation is responsible for low baseline airway caliber and AHR in individuals with chronic tetraplegia. Further scientific conclusions about NO and its role in control of airway tone, pulmonary resistances and blood pressure will be drawn upon intravenous and inhaled administration of L-NAME. This compound has been shown promising results for the treatment and prevention of orthostatic hypotension in individuals with tetraplegia. Knowing its effects on airways and potential of easier mode of delivery (inhalation vs. intravenous) is of utmost importance.

Incomplete spinal cord injury often results in difficulty walking. Training on a treadmill with body weight support may improve walking ability after spinal cord injury. The purpose of this study is to examine the effect of treadmill speed on spinal cord function and walking performance.

The cervical spine is most commonly injured, accounting for 53.4% of spinal injuries. More than 40% of all spinal injuries occur at either C4, C5 or C6 levels leading to variable loss of function in the upper extremities. Traditionally, patients sustaining a cervical spine injury were followed for 2 years to ensure that recovery had stabilized before offering upper extremity reconstruction. This type of reconstruction includes active muscle transfer, tendon transfer and joint fusion. Patients are most commonly assessed immediately at the time of injury. Muscle testing is commonly performed using Medical Research Grading System (MRC). Although complete neurologic stabilization may not be complete until 2 years post-injury, in the group with initial grade 0 muscle strength after the acute phase of injury, expectations of improved muscle strength to or beyond grade 3 after 4-6 months is minimal. And grade 3 muscle strength is felt to be the minimum useful functional strength in a muscle group. The investigators propose an early nerve reconstruction approach to the tetraplegic patient with dysfunction of the upper extremity to augment the available tendon transfers. A comparative pilot study is proposed to determine the effectiveness of supinator branch to posterior interosseous nerve (PIN) transfer in 5 patients with cervical spine injury. Patient who fits inclusion criteria will be offered the opportunity to be involved in the study and reviewed at 6 months from injury. If the patient still has not regained Grade 3 power in finger or thumb extension, they will be randomized to be in a surgical group or non-surgical group. If informed consent is obtained, then surgery will be completed between 6-9 months from the patient's original cervical spine injury. The patient will be followed at regular intervals post-operatively with expectation of 18-24 month follow-up. Measures will be used pre and post-operatively for comparison. Measures will include MRC muscle grade (EDC), range of motion, Disability of the Arm, Shoulder, and Hand Questionnaire (DASH), and The Graded Redefined Assessment of Strength Sensibility and Prehension (GRASSP) (Kalsi-Ryan, 2011).

The purpose of this research study is to evaluate the effectiveness of functional electrical stimulation (FES) provided by an implanted pulse generator (IPG) in correcting hip, knee and ankle function to improve walking in people with partial paralysis.

People with high spinal lesions are at risk of respiratory complications because they have partial or complete paralysis of breathing muscles. Previous work has shown that tetraplegic lung volumes can be increased by using abdominal FES during expiration. The technique is attractive because it is non-invasive, painless in tetraplegia and completely reversible. It may provide a treatment for augmenting the patient's breathing both in the acute presentation of spinal injury (when half of cervical injuries require ventilation) and in long term management of tetraplegia and high paraplegia. We propose a pilot study in a small group of subjects to see if the technique is feasible from both a clinical and engineering viewpoint. The aims of the study are: 1)To examine the effects of abdominal FES on lung mechanics and gas exchange in tetraplegic subjects. 2)To optimise the stimulation pattern and intensity via electronic stimulators and to design a trigger to allow the FES to follow the subject's own breathing cycle automatically.

The primary objective of this study is to achieve successful walking skills using exoskeletal walking devices over the course of 36 sessions in 3 months at specific velocities and distances in people with chronic SCI who are wheelchair dependent for community mobility. The secondary objectives are to determine if this amount of exoskeletal walking is effective in improving bowel function and body composition in the same patient population. The exploratory objectives are to address additional questions concerning the retention or non-retention of the positive changes, the effects of the increased physical activity from this intervention on vagal tone, orthostatic tolerance, lipid profile, total testosterone, estradiol levels, and quality of life (QOL). A Phase III randomized clinical trial (RCT) will be performed using a crossover design and employing an exoskeletal-assisted walking intervention. The experimental arm will be compared to a usual activities (UA) arm, as the control, in 64 persons with chronic SCI (>6 month post injury) who are wheelchair-dependent for outdoor mobility in the community. The WALK arm will consist of supervised exoskeletal-assisted walking training, three sessions per week (4-6 h/week) for 36 sessions for their second 12-week period. The UA arm will consist of identification of usual activities for each participant, encouragement to continue with these activities and attention by study team members throughout the 12-week UA arm. These activities will be recorded in a weekly log. The investigators hypotheses are that 1) this exoskeletal intervention will be successful in training ambulatory skills in this patient population, 2) the exoskeletal intervention will be better than a control group in improving body composition, bowel function, metabolic parameters and quality of life in the same population.

ABSTRACT/EXECUTIVE SUMMARY BACKGROUND, SIGNIFICANCE & RATIONALE: Between 10-20% of the more than 6000 cases of spinal cord injury seen annually in the North America have the clinical pattern of traumatic central cord syndrome (TCCS). These patients are usually older, most likely have sustained a fall, and have incomplete spinal cord injury characterized by dysesthetic and weak upper extremities. CT scan of the cervical spine in patients with TCCS often shows disc/osteophytes complex superimposed on degenerative or congenital spinal stenosis and MRI reveals signal changes at one or multiple skeletal segments. A minority of these patients suffer from fracture/subluxations, however, this group of patients are younger and have been involved in a more dynamic trauma. Since 1951, when Schneider et al reported this syndrome, controversy has dominated its surgical management. The current "Guidelines for the Management of Acute Cervical Spine and Spinal Cord Injuries" recommendations are only at the level of options, since prospective outcome data are unavailable. HYPOTHESIS: in acute traumatic central cord syndrome, surgical decompression of the spinal cord within five days will result in more rapid motor recovery, than decompression 6 weeks following injury. To test this hypothesis, we will pursue the following specific aims: SPECIFIC AIM I: To compare American Spinal Injury Association (ASIA) Motor Scores after three months post injury in patients with central cord syndrome operated on within five days of injury to a similar group of patients operated on 6 weeks following injury. SPECIFIC AIM II: To compare functional outcome, health related quality of life and posttraumatic syrinx size in patients with traumatic central cord syndrome operated on within five days to a similar group of patients operated on 6 weeks following injury. DESIGN: Single center prospective randomized study. PROCEDURE: In a two-year period thirty patients with traumatic central cord syndrome and cord compression (15 patients in each group) will be randomized to undergo surgical decompression either within the first five days or at 6 weeks following spinal cord injury. ASIA motor, functional recovery and health related quality of life between the two groups will be compared at admission, discharge from rehab facility 3 months and 12 months after surgery.