Biomedical subjects
Publications and source records attributed to J Doniec.
The principles of treatment of tibial pseudoarthroses complicated by skin and soft tissue loss with the use of cancellous bone grafts from posterolateral approach to the tibia by Harmon method were discussed. The detailed surgical technique was presented. Management of 3 patients that resulted in bone union was described.
The results obtained after the use of contractors in surgical treatment of 30 vertebral body fractures with their wedging and lesion of the posterior ligaments, while the posterior wall of the vertebra in the thoracic-lumbar spine was preserved, has been presented. It is a relatively simple surgical method enabling stabilization of fracture, reconstruction of the vertebral canal and improvement of neurological condition.
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The investigation covered 484 workers. Altogether 1787 determinations have been made, in this--1648 internal contaminations and 139 contaminations of air, hand skin and working surfaces. The internal contaminations (22% of results) resulted mainly from deviation from radiological protection rules and were reduced through certain changes. Those were tritium contaminations (application of tritium radioluminiscence dyes) and 125--and 131-iodine radioisotopes (in nuclear medicine laboratories) the highest levels of which were 20 mSv and 0.25% ALI respectively. The results of 238Pu air contamination measurements have indicates that the dust arising during the production of smoke detectors (with 238PuO2 sources) probably has no respirable fraction properties, which confines its absorption in lower segments of the respiratory tract. It has been demonstrated that in Poland there is no need of constructing a permanent central system of internal contamination control.
The internal contamination investigations covered 23 persons using radioluminescence paints containing tritium, assembling devices painted with those paints, and those having no contact with active paints but working next to the painting room. Determined were concentrations of tritium excreted with urine, air contamination at workplaces, contamination of workplace areas and hand skin. At the time covered by the investigations, the mean annual equivalent doses for those using tritium paints were reduced from 14-20 mSv to about 5 mSv. In those working next to the painting room they were reduced from 5.8-15 to 0.23 mSv. The exposure of those assembling the devices does not exceed 1 mSv. It was demonstrated that the main cause of the tritium exposure level was air contamination in working rooms.
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