Preliminary Evaluation of an Automatically Stance-Phase Controlled Pediatric Prosthetic Knee Joint Using Quantitative Gait Analysis

ASPL knee joint mechanism shown unlocked (left) and locked (middle) and in 90° of knee flexion (right).

Spatiotemporal measures for: (A) velocity; (B) stride length; (C) cadence; and (D) asymmetry index. NOTE. Median values are presented, with error bars indicating ranges. For the reference group (AB), medians and ranges are shown. The subject numbers on the abscissa correspond to those in table 1. Legend: Light bars indicate conventional knees and darker bars ASPL knees.

Kinematics for: (A) pelvic obliquity ROM; (B) pelvic tilt ROM; (C) pelvic rotation ROM; (D) hip ROM; (E) knee ROM; and (F) ankle ROM. NOTE. Median values are presented, with error bars indicating ranges. Hollow circles and dark squares indicate the intact and below-knee side data for the conventional and ASPL knees, respectively. For clarity, ranges (error bars) are omitted on the intact and below-knee sides. For the reference group (AB), medians and ranges are reported. The subject numbers on the abscissa correspond to those in table 1. Legend: Light bars indicate conventional knees and darker bars ASPL knees.

Internal joint moments for: (A) hip moment extension; (B) hip moment flexion; (C) knee moment extension; (D) knee moment flexion; (E) ankle moment dorsiflexion; and (F) ankle moment plantarflexion. NOTE. Median values are presented, with error bars indicating ranges. Hollow circles and dark squares indicate the intact and below-knee side data for the conventional and ASPL knees, respectively. For clarity, ranges (error bars) are omitted on the intact and below-knee sides. For the reference group, medians and ranges are reported. The subject numbers on the abscissa correspond to those in table 1. Abbreviations: DORSI, dorsiflexion; EXT, extension; FLEX, flexion; PLANTAR, plantarflexion. Legend: Light bars indicate conventional knees and darker bars ASPL knees.

Joint powers for: (A) hip power absorption; (B) hip power generation; (C) knee power absorption; (D) knee power generation; (E) ankle power absorption; and (F) ankle power generation. NOTE. Median values are presented, with error bars indicating ranges. Hollow circles and dark squares indicate the intact and below-knee side data for the conventional and ASPL knees, respectively. For clarity, ranges (error bars) are omitted on the intact and below-knee sides. For the reference group, the median and ranges for the group are provided. The subject numbers on the abscissa correspond to those in table 1. Abbreviations: ABSORB, power absorption; GENERATE, power generation. Legend: Light bars indicate conventional knees and darker bars ASPL knees.