Radiography of 60 normal wrists was performed in 50 adults to determine the inclination of the distal joint surface of the radius. The central ray was directed 10 degrees proximally in postero-anterior projection and 15 degree proximally in lateral projection. The values obtained were compared with those from perpendicular projections. No dfferences were found between the two p.a. projections. In the lateral projection with the central ray directed proximally the measuring points were better defined, resulting in significantly increased exactness of the measurement. The mean value for the volar inclination was 9 degrees in the latter projection.
Radiography of 40 wrists with fractures in the distal part of radius was performed. In the lateral view the inclination of the radial joint surface was analysed in different degrees of pronation and supination. The central ray was directed 15 degrees proximally and the results were compared with those obtained with a perpendicular central ray. In the perpendicular projections even moderate differences in pronation or supination between two examinations could seriously alter the measured inclination of the joint surface of the radius. The projection with the central ray directed 15 degrees proximally highly significantly decreased the errors between the measurements when compared to the perpendicular projection. The joint surface was depicted more dorsally inclined than in the perpendicular projection.
Abstracr. Four cases of arteriovenous fistula in ths renal parenchyma following percutaneous renal biopsy in uremic patients are described. The effect cn ths renal blood flow was studied with a dye-dilution technique. Although in all cases the fistulas were located peripherally in ihkidney, a considerable redistribution of ths blood flow could be demonstrated, resulting in decreased flow through the renal parenchyma. The diminished blood flow gave rise to decrtastd function of the affected kidney.
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