Document pp457oqOank7e16wzkyr052ak

FILE NAME State of the Art Literature SAL DATE 1956 DOC SAL063 DOCUMENT DESCRIPTION Excerpt from Danish Medical Bulletin A SURVEY OF DANISH MEDICINE PUBLISHED BY UCESKRIFT FOR L^ GER tely THE MEDICAL FACULTIES FACULTIES OF THE UNIVER ~fltieosf copenHAGEN AND AARHUS THE NATIONAL HEALTH SERVICE OF DENMARK OKLA OKLA OKLA OKLA OKLA Poul Bonnevle Ceskrift for Leger Mogens Fog Ugeskrift for L^ger EDITORS : 335 H. Lassen Nicla Blixenkrone University of Copenhagen University of Aarhus Assistant Editor Fritz Fuchs in 4) Richard Friedberg National Health Service VOL 3 wos A Publication of THE DANISH MEDICAL ASSOCIATION Domus Medica Copenhagen ) Denmark 1956 2 tte wy eee eee = ina) De Sao neg EE yle v9 eT se goieohce A eT ee hh SO 204 rr DANISH MEDICAL BULLETIN taining many servicemen Ulrich 1930 found 16 out of 5,700 etiology bullet wounds 5 cases pleurisy 5 cases tuberculosis 1 case " pneumonia 1 case unknown 4 cases and B h^ rendt 1930 found 12 out of 966 subjects etio- logy bullet wounds 5 cases tuberculosis 7 cases ad 1934 considers tuberculous pleu- ritis and hemothorax the only causes definitely. known to produce calcification of the pleura Patch & Perry point out that calcification - is usually unilateral but bilateral in the called idiopathic cases approximately 20 per cent of : ~~~ all cases . A special investigation of workers exposed to dust was carried out by Smith 1952 She out found cases of pleural calcification of 8,779 subjects examined Only four groups showed a definitely higher incidence of calcification than that among the average population viz workers exposed to the dust in making bakelite insulators 1.5 per cent calcimine 1.7 per cent mica thus give some support to Smith's contentica that the incidence of pleural calcification may- . ^' ; connected with exposure to mixed dust butan should be emphasized that our subjects have an been exposed to calcium While smaller pleural thickenings xp and a hesions are a rather common finding in chem rays of persons not known to have had any lung disease previously or to have been exposei to dust at their jobs the findings of pronounes bilateral pleural changes in the present seri.. definitely point towards an occupational origin The diagnosis of asbestosis may be made with confidence when these pleural changes are four^' together with parenchymatous lesions of - the lungs The occurrence of similar pleural changes without any definite changes of the lung proper may also with reasonable certainty be accepted as evidence of asbestosis in subjects knowino sort ; have worked with insulating material of the eon. used by the workers examined here 1.6 per cent and tremolite talc 6.3 per cent Tremolite tale is a calcium magnesium silicate which structurally resembles asbestos It is known to cause pneumoconiosis Calcimine is composed of whiting elay talc silica mica and asbestos SUMMARY me tes ba 31 workers engaged for 20 years or more in different kinds of insulation works were eI- Ll amined for occupational lung discase They had as Four cases of pneumoconiosis were found in this group Mica is a complex silicate of potassium aluminium magnesium calcium and fluorine Bakelite was mixed with talc and mica No case . Een been exposed to dust containing asbestos kiesel- guhr magnesia wool and wool 9 were found to have definite signs of pulmonary as- "Pe bestosis 19 showed abnormalities of the pleur~ ea.e of pneumoconiosis was found among the workers exposed to mica or bakelite No pleural calcifi- cation was found among 261 asbestos workers Smith suggests that it is the combined exposure Tose 12 of these being bilateral In 11 cases calcificaee tion of the pleura was found being bilateral in eS. of them ae anes to calcium and magnesium together with a dust producing pleural irritation which provokes the . calcifications None of the workers examined by us have been working with asbestos alone all of them have to been exposed kieselgu^rmagnesium rockwool and wool too The last three substances do not cause pneumoconiosis Exposure to kiesel- guhr is known to involve a risk as several cases of pneumoconiosis seemingly caused by this substance have been reported According to Luton Champeix Ravet & Vallaud 1956 it is primarily a question of the alpha- quartz content Exposure to the amorphous form of kieselguhr involves considerably less risk than does exposure to the calcinated substance nearly all of the silica of which may be in the form of quartz The kieselguhr used in this country is not known to be calcinated and analysis has not revealed the presence - of quartz In our cases the workers have been exposed to Le wget References ; oe ) Behrendt .; Beitr z Klin d Tuberk 1930 76 " 129-164 2 Floyd C. & R. H. Hepburn Am Rev. Tubere -y: 3 Frost .: Ugeskr L^ger1950 112 1284 1289 veo 4 Head .: Ann Int Med 1934 7 1295--1307 . vse 5 Ive .; Ugeskr L^ger1950 112 472 474 -.. 6 Jacob G. & H. Bohlig Fortschr Geh R^ntgen- wrt strahlen 1955 83 515 323 a 7 Kristiansen .: Acta tub Scandinav 1944 15 excus.oe 310 323 8 Luton P J. Champeiz M. Ravet & A. Vallaud Arch mal profess 1956 17 125 148 0 ) Merewether E. R. .: Tubercle 1933 3145 Jam 81 109 118132 139 ; -_ DS EPL 10 Murray M cit Merewether 1933 34 11 Noro .: Acta pathol et microbiol Scandinar 1946 23 53 39 : 12 Putch I C. L. & F. M. A. Perry in Marshall & Perry edit Diseases of the Chest London 1932 OD 13 14 15 Schrumpf .: Nord Med 1911 9 704 Smith A. R Am J. Roentgenol 1952 382 Ulrich .; R^ntgenpraxis1930 2 212 706 67 375 * 222 asbestos which is known to produce pneumoconiosis with pleural affection and to kieselguhr magnesia wool and wool Our findings 16 Wegelins C Acta radiol 1947 28 139 132 17 Wolff .; Nord Med 1940 5 335 341 18 Wolff .; Nord byg Tidsskrift 1940 21 1 43 rk, CY A