Recommendations on Standards for the Design of Medical Diagnostic Equipment for Adults with Disabilities, Advisory Committee Final Report

Conclusions

Design criteria based on the univariate analysis of abdomen depth is sufficient if all other clearance dimensions are unbounded (i.e., unrestricted) and abdomen depth is the only relevant dimension. The 95th percentile value for female users of manual and power wheelchairs was approximately 30.5 in. and would provide adequate clearance depth such that approximately 95% of female users can approach the machine up to the abdomen.

Analysis of the footrest clearance height, abdomen-castor depth and abdomen-footrest depth suggests a flange of depth 10-10.7 in. and thickness 1-1.2 in. maximum. However, a graphical plot of the data suggests that the flange thickness could be increased closer to the base of the machine e.g., with a gradient or triangular profile.