[Paresis of the brachial plexus: subcapital varus osteotomy, arthrodesis of shoulder joint and above-elbow amputation (author's transl)].

In brachial plexus paresis with partial sensory sparing in the upper arm and complete motor paralysis we amputate through the humerus at the distal limit of sensation. The remaining proximal humerus is fixed by an arthrodesis of the shoulder joint, combined with a varus-osteotomy below the head. This increases with axillary space, facilitates the fitting of a prosthesis and improves care of the skin in this critical area.

[Measuring of the human body with the "Differentiometer" (author's transl)].

The "Differentiometer" is a handy instrument suitable for many measurements of the human body. Many important parts of the human body in their length, in their geometrical position and in their relation to each other can be measured on the lying as well as on the standing patient. Some of these measurements could not be done clinically until now.

[Angle-measurement on patient and radiograph, simpler, quicker and more exact with the zero-angle-meter (author's transl)].

A new angle-meter, clinically proved, is described. It permits angle measurements on the human body with the zero technique (Debrunner 1971, 1973) and on radiographs, particularly of angles of scoliosis after Cobb (1948). It is much simpler, more exact and quicker than the present techniques which are critically analyzed.