Document mmxnXXE9RmMeponZakRRYrNGg

Willard St or age Battery Company m a in o f f ic e a n d f a c t o r y 246-286 E. 131s t ST. C l e v e l a n d 1, O h i o M arch 1 0 , 19 52 R o b e rt A. K ehoe, M.D. K ettering L ab o rato ries Eden Avenue C in c in n a ti l , Ohio D ear D octor: Uy in q u iry to you on th is d ate is in reg a rd your o p in io n o f the u rin a ry p o rp h y rin te s t in the d e te c tio n of le a d ab so rp tio n . Our o re se n t program a t W illa rd S to rag e B a tte ry c a lls fo r m onthly h is to ry and p h y sic a l exam inations on a l l v/orkers exposed to th e le a d h azzard to g e th e r w ith s tip p le c e ll c o u n ts. Blood and u rin e le a d c o n c e n t r a t i o n s a r e d e te r m in e d -when i n d i c a t e d . The q u e s t i o n a r i s e s w hether u rin a ry p o rp h y rin d eterm in atio n s can s a fe ly rep lace s tip p le c e ll c o u n ts . I b e l i e v e I am f a m i l i a r w i t h m o st o f t h e l i t e r a t u r e i n r e c e n t y e a r s regarding u rin a ry porphyrins in le a d ab so rp tio n . In d iscu ssio n w ith my c o l l e a g u e s i n l e a d p ro g ra m s e ls e w h e r e i n C l e v e l a n d , I f i n d h e s i t a t i o n to adopt i t s use because of lack of a u th o rita tiv e opinion. Because the t e s t i s a p p a re n tly e a sy and c h e a p ,' a lth o u g h no more r e l i a b l e th a n sm ear m ethods, I should lik e to ad o p t i t s u s e , a f t e r a p e rio d o f t r i a l and e x p e rie n c e , i f i t can s a f e ly re p la c e sm ear m ethods, 1 can see no added value in i t o th erw ise. Should your answ er be in th e a ffirm a tiv e , could you ren d er an op in io n on th e m ethod u se d by D o cto r A. L. B rooks o f th e F is h e r Body D iv is io n o f G e n e ra l M otors a s d e s c r ib e d i n th e S e p te m b e r, 19!?1 i s s u e o f I n d u s t r i a l M edicine and S urgery? Very S in c e re ly , WILLARD STORAGE BATTERY COMPANY HDP:emb Herm an D. P o c o c k , J r M.D.