In settings where three dimensional gait analysis is not feasible, observational gait analysis can provide important information about gait pathology.  Among the validated scoring systems to organize the observations of gait, the Edinburgh Visual Gait Score (EVGS) is the most comprehensive and has the most favorable psychometrics.  Improvements in mobile videography have created opportunities to obtain high-quality slow-motion video in a clinic setting.  These videos can provide excellent documentation of gait pathology in the sagittal, coronal, and vertical planes.  Free and low-cost video analysis software is now available on all mobile device platforms, allowing for slow-motion video analysis of gait with increased accuracy.  By utilizing the appropriate technology with a validated scoring system, gait analysis outside the walls of a gait lab is possible.  Though limitations of the mobile enhanced observational gait analysis technique require further study, the technique can facilitate improved documentation of gait pathology and improved communication between providers.   In settings where three dimensional gait analysis is not feasible, observational gait analysis can provide important information about gait pathology.  Among the validated scoring systems to organize the o In settings where three dimensional gait analysis is not feasible, observational gait analysis can provide important information about gait pathology.  Among the validated scoring systems to organize the observations of gait, the Edinburgh Visual Gait Score (EVGS) is the most comprehensive and has the most favorable psychometrics.  Improvements in mobile videography have created opportunities to obtain high-quality slow-motion video in a clinic setting.  These videos can provide excellent documentation of gait pathology in the sagittal, coronal, and vertical planes.  Free and low-cost video analysis software is now available on all mobile device platforms, allowing for slow-motion video analysis of gait with increased accuracy.  By utilizing the appropriate technology with a validated scoring system, gait analysis outside the walls of a gait lab is possible.  Though limitations of the mobile enhanced observational gait analysis technique require further study, the technique can facilitate improved documentation of gait pathology and improved communication between providers.  bservations of gait, the Edinburgh Visual Gait Score (EVGS) is the most comprehensive and has the most favorable psychometrics.  Improvements in mobile videography have created opportunities to obtain high-quality slow-motion video in a clinic setting.  These videos can provide excellent documentation of gait pathology in the sagittal, coronal, and vertical planes.  Free and low-cost video analysis software is now available on all mobile device platforms, allowing for slow-motion video analysis of gait with increased accuracy.  By utilizing the appropriate technology with a validated scoring system, gait analysis outside the walls of a gait lab is possible.  Though limitations of the mobile enhanced observational gait analysis technique require further study, the technique can facilitate improved documentation of gait pathology and improved communication between providers.

Altered wrist biomechanics consequent to a scapholunate dissociation or a scaphoid nonunion accelerates the degeneration of the surrounding articular surfaces and often induces arthritic progression referred to as a scapholunate advanced collapse (SLAC) or scaphoid nonunion advanced collapse (SNAC). 1,2Watson and Ballet described four stages of the arthritic progression of the affected articulations. 2 Stage III progression is determined by radiological evidence of degenerative changes to both the radioscaphoid and the lunate-capitate joint surfaces, and is generally associated with progressive pain and reduced wrist Keywords ► scaphoid nonunion advanced collapse ► arthritis ► advanced collapse ► biomechanics ► wrist AbstractBackground Scapholunate advanced collapse and scaphoid nonunion advanced collapse result in high morbidity and pose significant challenges for active patients. Multiple treatment options have been proposed to yield satisfactory results; however, restoration of physiological wrist motion remains an issue. Questions/Purposes The objective of this study was to compare wrist mobility after four different treatment methods for grade III wrist collapse: (1) no treatment, (2) scaphoidectomy and lunate-capitate arthrodesis, (3) scaphoidectomy, lunate-capitate arthrodesis, and triquetrum-hamate arthrodesis, and (4) scaphoidectomy, lunatecapitate arthrodesis, and triquetrum excision. Methods Four paired (n ¼ 8) fresh-frozen human cadaveric upper limbs were used in this controlled laboratory study. Computed tomography scans were collected at all testing states and measurements were made to evaluate midcarpal joint mobility and alignment. Results A significant decrease in wrist extension was observed for all treatments. Middle column and two-column arthrodesis demonstrated no significant differences for carpal alignment and mobility. No significant differences were observed for triquetrumhamate mobility or wrist extension between the partial and two-column arthrodesis. Triquetrum excision significantly improved ulnar deviation. Conclusion The most important finding of this study was that the one-column arthrodesis has comparable carpal alignment and range of motion to that of bi-column arthrodesis. Clinical Relevance The results of this study suggest that a stage III advanced wrist collapse can be treated by isolated lunate-capitate arthrodesis with scaphoidectomy. Fusion between the remaining carpal bones may not be necessary because the carpal alignment and range of motion of the remaining joints were not significantly different in the present study.