Longitudinal assessment of oxygen cost and velocity in children with myelomeningocele: comparison of the hip-knee-ankle-foot orthosis and the reciprocating gait orthosis

Oxygen consumption and cost and velocity were evaluated over time in 23 children with myelomeningocele to determine whether differences exist when children walk with hip-knee-ankle-foot orthoses (HKAFOs) versus reciprocating gait orthoses (RGOs). Children using HKAFOs had similar oxygen cost as children using RGOs while achieving a faster velocity. Children walking with HKAFOs into adolescence had a faster velocity and lower oxygen cost than children who discontinued use of their HKAFOs. No significant differences in velocity or oxygen cost were found between children who continued to walk with RGOs and those who discontinued use of their RGOs. Upright ambulation may progress from ambulation with an RGO, when the child's upper extremity strength to mass ratio is low, to an HKAFO when upper extremity strength improves and velocity or keeping up with peers is of concern. Wheelchair mobility should be offered when speed and an energy-efficient method of community mobility are desired.

Comparison of three ankle-foot orthosis configurations for children with spastic hemiplegia

The purpose of this study was to examine the effectiveness of the hinged ankle-foot orthosis (HAFO), posterior leaf spring (PLS), and solid ankle-foot orthosis (SAFO), in preventing contracture, improving efficiency of gait, and enhancing performance of functional motor skills in 30 children (21 male, 9 female; mean age 9 years 4 months; age range 4 to 18 years,) with spastic hemiplegia. Following a 3-month baseline period of no ankle-foot orthosis (AFO) use, each AFO was worn for 3 months after which ankle range of motion, gait analysis, energy consumption, and functional motor skills were assessed. The HAFO and PLS increased passive ankle dorsiflexion and normalization of ankle rocker function during gait. Normalization of knee motion in stance was dependent upon the knee abnormality present and AFO configuration. The HAFO was the most effective in controlling knee hyperextension in stance, while PLS was the most effective in promoting knee extension in children with >10 degree knee flexion in stance. Energy efficiency was improved in 21 of the children, with 13 of these children demonstrating the greatest improvement in HAFO and PLS. Improvements in functional mobility were greatest in the HAFO and PLS.

Does gait continue to improve 2 years after selective dorsal rhizotomy?

Although changes in the gait pattern of children with spastic diplegia 1 year after selective dorsal rhizotomy have been well documented, minimal information exists regarding the continued changes in the gait pattern over time. Despite improvements in gait after rhizotomy, 66-75% of patients still require orthopaedic surgery for residual deformities. The optimal timing of the orthopaedic surgery after selective dorsal rhizotomy is not well established because of the lack of information regarding changes in gait over a long term. Using three-dimensional gait analysis, the gait pattern of 23 children was evaluated preoperatively, 1 and 2 years postoperatively. There were significant improvements in hip, knee, and ankle motion at 1 year after surgery. Although improvements in the gait pattern were found between 1 and 2 years after surgery, the changes were not significant. Therefore orthopaedic intervention may be undertaken at 1 year after rhizotomy to enhance function, as changes in gait from 1 to 2 years after rhizotomy are minimal.

Interobserver reliability of the gross motor performance measure: preliminary results

Although assessment of the quality of movement in children with cerebral palsy (CP) is difficult, the development of the Gross Motor Performance Measure (GMPM) has facilitated this process. In order to determine the interobserver reliability of the GMPM, 36 children with spastic neuromuscular disorders (mean age 7 years, range 4 to 15 years) were evaluated using four of the five dimensions of the GMPM. Percent Agreement, Intraclass Correlations, and Kappas were calculated by both dimension and attribute to determine reliability. In addition, reliability measures were evaluated over time to determine whether reliability improved with continual use of the GMPM. Overall, interobserver reliability was in the 'fair to good' category regardless of the reliability measure used in the analysis. Reliability scores improved over time with a greater number of individual item scores moving from the 'fair to good' category to the 'excellent' category. Results from this study indicate that it is possible to assess reliably the quality of movement in children with CP.

Developmental skills of children with spastic diplegia: functional and qualitative changes after selective dorsal rhizotomy

OBJECTIVE

This study examined changes in muscle tone, passive range of motion, stability, and mobility in developmental skills at 6 months and 1 year after selective dorsal rhizotomy (SDR).

DESIGN

Prospective outcome study of a consecutive sample.

SETTING

Private children's hospital.

PATIENTS

Twenty-six children with spastic diplegia: 13 independent and 13 dependent ambulators (assistive devices).

RESULTS

A decrease in spasticity was seen at 6 months after SDR, with no further decrease at 1 year. Increases in passive range of motion of the hip and ankle were seen at 6 months after SDR. The ability to assume and maintain developmental positions with improved alignment and stability was seen more frequently at 6 months after SDR, whereas an improvement in the ability to perform transitional movements was seen more frequently at 1 year after SDR.

CONCLUSION

SDR decreases spasticity and increases lower extremity range of motion in children with spastic diplegia and appears to be associated with the ability to assume a greater variety of developmental positions with improved alignment, thus greater stability. Improvements in the ability to perform difficult transitional movements at 1 year after SDR are most likely the result of the combined effect of maturation, SDR, and intensive therapeutic intervention.

Assessment of upper-extremity function in children with spastic diplegia before and after selective dorsal rhizotomy

The upper-extremity function of 26 children (mean age 6.0 years) with spastic diplegia was assessed prior to and one year following selective dorsal rhizotomy (SDR). No significant change was found in upper extremity range of motion, muscle tone, or strength (MMT). A significant increase was noted in grasp strength bilaterally which could not be explained simply on the basis of maturation. Manipulation patterns were noted to improve significantly one year after SDR; however, this was proposed to be a maturation rather than intervention effect. Standardized test results revealed no significant improvement in functional hand use when the scores of children with spastic diplegia were compared with age-matched norms, to control for the effect of maturation. The significant improvement found in ability to toilet, dress and undress independently was most likely due to the effect of SDR on lower-extremity muscle tone. Further investigation with a matched control group would provide a conclusive result regarding the effect of SDR on upper extremity function and assist in understanding the maturation of hand function in children with spastic diplegia.