Document G8gyrEvVByjVVYB5rqaw6bV

FILE NAME: Asbestos Mining (ASMI) DATE: 1947 DOC#: ASMI011 DOCUMENT DESCRIPTION: Published Abstracts from the British Journal of Industrial Hygiene 100 BRITISH JOURNAL OF INDUSTRIAL MEDICINE the 17 n itients suffered from anorexia, all but 1 from marked l<Mof weight, and all but 2 from intense dyspnero on exertion . Cough, weakness, insomnia, and taeby- card wire prominent. Examination of the chest by j rays sihbwed various abnormalities in most cases. In suae 1 tl eire was a fine diffuse granularity ; in stage 2, a diffuse reticular pattern on the granular background ; and in jc 3, distinct nodules appearing uniformly throughou.t the lungs. Pathological examination showed focal and difidse chronic granulomatous inflammation of all lobes <(fboth lungs, and subacute progressive fool and diffuse. hcpaitic necrosis. Many kinds of treatment were tried, will no effect. H. M, Vernon. they developed ary reticulation, and nodular changes were not observed tinder 30 to 52 years. The dust hazard was also great in it en working in the final stages, such as the polishers. Nodules in the lungs were generally peripheral in distri jution. The author observed 6 cases of lymphogiandula calcification of egg-shell outline. It is suggested t tat the final processes should not be earned out in do* d spaces. A shed with open sides is better than one with watts, and machines which create much dust should be fitted with appropriate removal systems. It may prove more effective to give men filtered air under p essure rather than masks with filters. G. C, Pether. A HistoUgjical Basij for the Reticulation to be Seen in X-Ray Photographs In Pneumoconiosis. (Les bases histoligiques des images radiologiques de reticulation observ dans les pneumoconioses.) Poucard, A. (194$). Arch. Mai. Prof., 7, 35. The a'ul hor describes the various stages of reticulation in pneuitvi$coDiosis. Silica and coal dust can be demon- strated hiAtologically along the peribronchial ducts, and the distribpjition seems to correspond with the radiological picture ; I>ut the dust is practically transparent to r rays, and it is icoessary to show up the calcium deposit by micro*inopicration L. Roche. Lung Retention of Quartz Dust Smaller than One-half Microa, Hatch, T. F., and Kinosvattbr, V. H. (1947), J, induti r. Hyg., 29, 342, It is well known hat when quartz particles of less than 1 p in diameter ar i inhaled they are much more active than larger particle ; the object of the present investiga tion was to determine if experimental animals would retain a sufficient: mount of sub-microscopical crystal line silica in their 1mgs to produce evidence of dama^te. The experimental t lust was obtained from commercial pulverized quartz l-y settlement in water, the particles which remained in suspension to a depth of 1 cm. after settling for 24 hous being collected. The median size Silicosis it Workmen In the Alzo Granite Quarries. (La silicosi icgli operai ddlc case di 'granito di Alzo ) Zanett , E. (1947). Med. tl. Lavoro, 38,173. of the particles, as letermined from electron microscope photographs, was ( -IS p. The test material was kept in water suspensio i and was atomized by means of a high-velocity ejeetcr. An air current of 1 c. ft. per Patients from the granite quarries of Alzo were .studied, t is concluded that the pessimistic views of American tuthort concerning the inevitability of silicosis after a feu years' exposure are unreasonable. r The roc :s worked at Alzo are volcanic in origin, and the essenti li constituents are quartz, orthodase, orthose, and mica, >ut other minerals also occur. The total silica content is laiily high and only a little below that found in the ftava an forest district. Free silica fquaitz) represents 40 tu 45% of the total silica. Quarrying is ,Ciwaiji>icfdrootml Mtincc processes. the hillside, m lite In the first the stone is cut second tlic block is salt into smaller pa ts, and in the third n is finished to stia|>e. The first piOccss is dangeious and he miners olten work on a steep lope suspended from ropes. Holes drilled to take expo: ive charges may ho TO metres long, and the drills ate tamed by hand while being struck so as to minute--heated on us way--carried the dust into the exposure chamber, and it escaped through a highvoltage electric prec pitator. whereby the mass concentra tion of the dust ii the chamber was determined, it amounted to 35 mg per cubic metre. Guinea-pigs were exposed daily for criods of up to 4J months. Lung sections from the mimals showed that in every case after 70 weeks' expesure the bronchial lymph nodes were enlarged to more than three times the normal diameter 'I he following progressive pathological changes were observed with increasing exposure ' (I) An accumulation of mononuclear ntw reticular cells m the septa and alveoli I areas were discrete al first, but became confluent and linally involved large pennons of 1he parenchyma. (2) The lung changes were followed by similar changes in the branchial lymph nodes, till finally the enlarged node was almost filled wn|i altered tissue. HA/. Vernon. provide a perfectly circular croM-section. At intervals the dust accumulated in the holes is blown out Hy a Some Remarks on Asbestosis. (Quelque.s considerations mechanical pump. Dlack powder is the only explosive sur I'amiantose ) I RotJS5t.AU, I.. (1947). Sent. Hvv., used, as d namite shatters the stone too easily. I he stone is stratified in three planes, but only experts can Paris. 23, 1811. ; detect these with ease. 7he cuts made in the stone must be aligned ivith these factors in mind. The division ot the stone is partly can ied out with wedges. The Surfaces of the slums which have been roughly cut to shape are finished wit i hammers and small cutting tools. Polishing Experimental AsbW osis. Pathognomonic Value of the " Asbestos Body." (Amiantoseexprimentale Valeur pathognomonique M (147) Sent du " Corps 'tip , Par it, 2d3'A, n1t8i1a4n.ie ") (iinoux. I is generally perfoimcd by machinery in which arc the Ailtestosis und Rufin aluirj Tuberculosis. (Amunlose et abrasive m llenis and water, Some dry polishing is tuberculose pulm .maue.l DltSMLULLS, R , Glkoux, done. M., and Richard P. (1947). 5cm. Hop., Pans, 23, siliOcoftic37noat ualmesi,ne1dm, a9ssihveadsilriceotinceulcahrancgheasn.g4esa.ss1o4ciahtaedd 1818. i tuberculosis, and 5 tuberculosis without silicosis. The periods spe;il m the quarry varied from 20 to 52 years. The average age exceeded (0 yeais, and the diagnoses described v ere made exclusively on the radiological evidcnct, 'Tie figures showed that the dust hazard was greatest for those who woikcd wi.h chisel and hammrt, These men l ad generally worked lor 20 to 25 scats helte Asbestosis and CanUr of the lauig, (Amiantose et enneers pulmonaires.) DtSMhVi, R.. Rousseau, L., C'ilROUX, M., and SIrOiS, A. (1947) Sem. Hop. Parts, 23, 1820. 'lhese four pnpcrs Lom l'ioin Quclxe, <-anada, wtieie v;vcial workers in the ,isi*;;,tus mines hve been studieu ABSTRACTS I^ a iS S a fc3g F S S S S S ^ a ^ iS TS&xss&&datosii iisn*otan simpiw 101 iJ lllrtgS Qf haa<rf as, wneedSreospirratory symptom* tP.Kma*Ukft dyspn*. s s s s 5 s s &l-As ^r STM& Ss sSfSfSs = i3 2 ^ ^ ] ^ 2 s ? s TM , V > w i m o p 1 S u s S S S ! tb m to " " ! r'" ch to w m i " ' S f S i f u I . K K TM .5 y s - S S l 3 & > ^ "f s y r t ~ ' > .i * " "* g t e u r . -srtssssg fcZ 1 *" 'mom`Wi " w l 1 hh i ^ 10ntonthfU JPJ^ SKttcS of P um^ f ulc-workera. S ^ ^ L d U being fibrosis, am0.n| ' ar4 given, no " f P f in St. cas .n the ^ * ,k miners * & > * ! is quoted. A 5lu"' N y is detailed. **'t*nanicd by Lawrence County. ^ asbestu. lo fthe ^ ^ s u ^ S E s s s EC Sh?^a mes showed lesions m thj W 0f forma- E-aS^sSiSwit^ t Kd* 'L,i" tS i" " Kret*"u"'" Ji"' i s * t s s w w g l i ,, r r s r s i ^ to r suits m m,crowop^hm riom the liberated red alveolar walls; the hxmogl ^ f pkp already enclose cells is taken up by the pbasocy " f inttaiesucular the asbestos fibres. S u teu u n w g ^ rf asb6stos m 5Ha!t o "-=SSsass injections into guinea-pigs of stapjn granulomatous olive oil resulted m the ^ 't u,a X hen however, tb lesions but no asbestos tod'- F"inU> which 1 ml. of susDension was injected into an t J before, asbestos field., >s" ", , r o i ' a s iZ ? . S had been injected c o d e r s , ' ! ^ he bodies were found alter_iTM.nhipX r n has significance, pMrlleCDsCeensimtceiemuoplfclsiae.ssbCeUsiSitMrom1sCi*br.io.idie`sRi'n,, 'Ph"Lf lliwnreagpsi.onrto ahisptoarlyiuiot.l atupbeedrc4u4loyseisw.s, Hwe whhaodsewlakm*rdti ^ joefxpasebrieesntcoes iS s r - ^ - ^ s a f S S s ; " is ' ,.* . :r v r r s . r ; * dyspnoea swvaps 'gpreTMau.;-'uws,,` SmcSiJe(lCe*ot55two t-utsscr; TM ltis`was s ' hietf ' ^ o f f i S a c u e material The authors argue tha he-t.l to v (hRt (hey have no ----t.f-.orr tW'tiulhbfn.rrCcUullOoMsjc. 1b>Uu t-tip , 'a^.irKcjmuttiioIosMiSV ^indti *v in (hecorresponding h'ho H'^he ,plaques_ar consniere , lung changes were touno , . J .:~.iaruv i *,WW**" ' m in Dihces_mU__enuiJtlee-*ds, S1R2ta/omtuekssss.aJ]eau. r. Guou aiL .gl g'trois record brief ^ and cancer of l ddarheee.tiaauiIllu,*.sngconf 22(rTrpphhaacettiieeccnnllattassiimmwh'thoa.J 'thatadr usb^Lioosnl.y , -t-e--l-.---w-iU.hs 1 case cannot ihe Pulmonary vVeesssseelsls in SilicrossliisiL--osi.)11c asbestosis has been mtordtcl^K. 1 1 j(irMmcnt with Changes in me polmonari ntu 7) be allowed Nm l,'en- t 1 pk y an impor- altcranoni ^ lS`A1 a,,d PbcCHW.| L. U * tUhen tstpataeitmienntthtehaptaMthogenesiss`" tP PpUL o nar f y carcinoma.. ^ ard,,^ MjVfUetN/./.diA. NLtosvoCmL\3n8. a'()7 ivi- i Dvspmra of Effort In Undergroun 1 ^ `effort Appraising UHySatSt. E-riCo*ti>pt,i1in94, 7)I.-. EJ-.- D`f S . (OUildueS 'cmarquej sj P houilRres) SindTustir/.r)gtys' .. 229..2=ff'' 55- . n,i sire of lhe cher Icsouvricre^U fond emp ^ h Mol, p*f.. Mahtin. E.. and Rot-H. l nte risk of Sdicosts ^ J ^ m d tL 7,. 119977,. ,,1I,,ms of coal-mi'ne--rs The significance of dyspniea hi| varying degrees with and without pu monary U. examined I.3M