A severely brain injured man had broken his kneecap in a fall. The Zimmer frame supplied proved unsatisfactory as he placed himself at an angle into the frame and pushed himself along with one leg which trailed behind.
Two obsolete Zimmer frames were bolted together and 600mm horizontal bars fitted.
The improvement was remarkable. He moved at once into the enlarged frame and was able to stand upright with both feet firmly on the floor. The slightly increased weight of the apparatus does not seem to hinder him getting around.