Document jgO0aNxEdr9XEoRMDGNEeQkJk

FILE NAME: Saranac 7th Symposium (SSY) DATE: 1952 DOC#: SSY050 DOCUMENT DESCRIPTION: Transcript of Summary by Dr. Vorwald J . (P Chapter T hirty-four ^ . - 7 of the Symposium A rthur J . VervaJLd, K. T. RECElvES , f H s - O n E ;JM k li-- M.LN! 3>uring the symposium v hove had the o p p ortunity to eorplcre and discus; common problems v ith the o b jectiv e th a t in d u s tr ia l h ealtn be improved. A revie-* c f the nepers end d iscussions shov* numerous e n trie s or. the p o sitiv e sid e o f cur h y p o th etica l ledger but th ere are o u ite e number or. toe negative sid e e ls e : th ere tr e m v , marry things vhich ve ju s t do not kmc- at the present tim e. Ve h e re d is c u s s e d d e f i n i t i o n s en.d te rm in o lo g y and hsve found c u t l i s t to ere i s r o t -uniform agreement about the concept pneumoconiosis. h:v broad sn ail the te rm be? S h a ll i t be a l i m i t e d erne? I b e lie v e t h a t th e v e i g h t c f o pinion r e v e a le d by th e d is c u s s io n s vould i n d i e - t e t o a t th e concept c f tr.e cuso e ls e ase p n e u m o co n io sis sho---Id be a broad cne ar.d C *r c t be r e s t r i c t e d to t-.ose cor.di t i e n s im v h ic h sigmificam.t damage tc tn e 1'ung has beer, produced by r u s t . Con c e rr.in g tr.e term s i l i c o s i s th e r e i s some cues tie r . as t c v h e tr.e r the c e f i - i t i :r. i n use teds;- i s a c o r r e c t erne. I n re v d e v in g c ld problems i t v as b ro u g h t c u t t h a t toe mechanism by v h ich ire s i l i c a e x e r ts i t s e f f e c t upon t i s s u e i s n e t d e f i n i t e l y knevn. Cf v a rio u s t h e o r i e s p r e s e n te d , cne d e a lin g v i t h tr.e c e n a f u r i n a tLi-o n rcdJ" p--r o t e i n Wty- s s .o c s i s dov u n d e r i n v e s t i g a t i o n by th e I-epartment c f B io c h em istry c f th e Truce:-u Founds H e n tic n v a s made c f d iv e r g e n t o p in io n s co n cern in g a s b e s t o s i s , vhich in d i c . - t e i n o b s e r v a t i o n s about in d i v i d u a l s im. tr.e a s b e s to s in d u s tr y i n Canada ano ir. the w i:JU L L L 2 . K.L.M c '-'-' - I I?sited States not agree v i t i sim ilar observations about verier; in the in d u s try in England. Dr. Eardy shoved th a t beryllium ? t i l l presents many problems end l i s t even todsy ve are c o t sure t h a t b sry --iurn i s the c. IM' *CWW i c th e d ise ase a sso c ia te d v ith exposure to t e a t e .e s e c t. Dr. Bar-.* be--e.cs t i t t th e re is perhaps a p re c ip ita tin g f a c tc r j i t v n ll be r e c a lie - --a--.- y e a rs ago Dr. Gardner suggested th a t th e re migr.t be a fa c to r "sc" . Beg^r--ng S h a v e r's d isease th e re vas, f ro r the evidence p resen ted , a t le s s ! an --plica- t h a t th e aluminum conponer.t of the bauxite produces toe d ise a se . Production th e nev sy n th e tic s i l i c a s , the u ltra m ic ro sc cp ic s i l i c a p a r tic le s , ve: snovr. ' impose many d i f f i c u l t i e s fo r the phy sician , f o r th e in d u s tr ia l h ygienist vm: has to d e te c t th ese substances ir. the e tro s -h e re , and fo r our colleagues in le g a l p ro fessio n vhc must adm inister lav s vr.icb r e f e r to disease caused by p a rtic le s of microscopic rather tsar, ultram icrosccpic s ite . ;n e n tir e day vas devoted tc sub jects r e la te d to pneumoconiosis in coal m in ers, during vhich ve had the b e n e fit of the opinions and observations cf tun co lleag u es fre n Great B rita in . I t vas brought cut th a t ve do net teov vheti th e carbonaceous conponer.t cf co al, per se, i s damaging to p--nonary tud*c-e or v ie th e r the coal dust and the accompanying in the lungs cf coal venders n e c e s s ita te the preserve cf sene substance ctr.er t.aar. tr.e carocn^cr component cf c o al. There vere d iscu ssio n s r e g a r --ag racoc.ogoca^ e*ass--.c atoe c f coal miners and stan d ard izatio n in the in te rp re ta tio n cf shadc-.-s present th e roentgenogram, and i t vas made obvious to a l l cf us th a t the role cf tr. I a. r a d io lo g is t i s indeed a d i f f i c u l t one. Tne ta in s re v e a l: also th a t the e ' ology c f pneumoconiosis i r coal v c rle rs appears to be more advanced in Zngli than in the T rite: States. l l E i ntwtivLU r.n .n ii O A T E :jy k M.E.M V~. <'_J_i: a_ d isc u ssio n s or. pu*:mn~i>?y cancer d is c lo s e - th a t tn ere ere re.h.ve_y fv i n d u s t r ia l substances v ric h d e f in ite ly have tue cap&c--.` t*. pro_.ce cc_.cs. o f the lung b u t, as Dr. Hueper pointed out, th ere are aery m a teria ls vhich c e r ta in ly should be vatched through the veers arc vhich are indeed p o te n tia lly h a z a rd o u s. V vere informed t h a t th e c li n i c a l evidence c la ss ify in g chromate as a carcinogen i s a ct toe v eil-d efin ed arc th a t the evidence from It . S e e tje r's e x p erim en tal s tu d ie s , tc d a te , i s n e g a tiv e . Ve vere tc_c about tne e x p e r t s . . --- p ro d u ctio n of pu*nonary cancer by beryllium but i t vas noted th a t ins a s s c c i- a t i o r o f cancer and beryllium vas ar. observation tn * t arplaec os--y tc e::per_- a e n ta l anim als and she'lld not be tra n s fe rre d tc burner su b je c ts, pending v a lic a ta c f the o bservations or. experim ental a r.ita ls ant penning p ro :: cf an tncreaseo in cid en ce c f pulmonary cancer in in d iv id u a ls vhc have bee., erepose: t : bery--tum. There vas an extensive discussion cf pulmonary c is a r i- u ty , p a rtc a - au: t o ta l d is a b ility , p-lmonary function an: dysfunction, breathlessness; a ll these th in g s vere mentioned. I t is evident th a t fron the p h y sio lo g ist's standpoint th e re has been much improvement in technic an: methodology f e r estab lis-tin g v h eth er pulmonary d is a b ility e x is ts , but irre sp e c tiv e cf a ll fees* re fin e : te e n tu e evidence presented by the p h y sio lo g ists tcasy i s semr-nat d istu rb in g . 3 fe su re t h a t c lin ic ia n s , ad m in istrato rs c f in d u stry and members cf tre -e ra - r r c - fessio n are not yet villim g tc accept the im plication th at v.ere is often a car c f pulmonary d is a b ility vhich ve have not re a liz e d vould be . 3 nasu t c p o in t out th a t dust exposures d: n o t, in ever, single v e ra er, gave rase t : a r u in onary d i s a b ility , th a t in d u s tr ia l vorkers are a p a rt cf the general ?o y__a t ani: , as in d iv id u a l persons, tr e su b ject tc those pulmonary diseases --rich a f f l i a ls o members of the general population vho have ha: no exposure DATE: J U l 3 i 1975 h , M.LM c ts e s o f th a t kind th a t c o n s titu te a problem vhen determ ining vnetber an in d iv id u a l' s disease i s the r e s u l t of h is occupation or v oetaer is has no re la tio n to his occupation. F i n a ll y , I believe th a t the symposium has provided the opportunity fc r the exchange of ideas and the discussion of problems in vnich ve have a s u t-a - i n te r e s t anc I an g ra te fu l to a l l vho attendee our m eetings. p c, 0?ul.STI3s Or. b eh alf of the overseas p a rtic ip a n ts ir. t h i : s._ p c s--_ , a c f vhen 3 an sure share my v iev s, I v ish to express cur apprecae too:. of toe o p p o rtu n ity of attending the symposium. Cur problems are perhaps net the problems cf the various a d n in istra tie n s cf American re.t in tne Unites S ta te s. Tne stiposlum brought out one more vhat previous symposiums have done: to u t tn e problems c f pneumoconiosis are extremely com plicated; th a t vnetner one d eals v ith the etiology of the disease, v ita the various veys in vr.icn i t s e f f e c ts could be am eliorated or prevented, v ith compensation problems or v ith th e a d m in istra tio n c f vorkaen's ccmpensation l&vs, cne has a fe e lin g cf pusnn a g a in st an e la s tic v a il vhich, as cne th ru s ts , i t a sid e , comes bach v ith a i r os eo-ual fo rc e . But gradually ve are maling p rogress, ar.d a symposium r-co as m cne w posing problems, vnich is toe f i r s t step in t..e sclutior. of any rro b .e h e lp s t forward march o f iccovueage. j e r t-:e c p^. r . ---- o. . "" c = - t h i s svmpesium, even in the r o le c f l i s t e n e r s , ve are de=rl.. g r - . e . -- - -- th o se vho have organised th e symposium and have vorhed sc nara tc male at a s u c c e s s , feme. :an p,, =. ri .!*rcv_ ^ tnco . . . ----t-h----u-r J . Y or-alc ami to h is s t a f f ,