Document Detail

Potential exposure to metal fumes, particulates, and organic vapors during radiotherapy shielding block fabrication.
MedLine Citation:
PMID:  3785004     Owner:  NLM     Status:  MEDLINE    
The shielding-block fabrication areas of three hospitals were surveyed to assess inhalation exposure to lead (Pb), cadmium (Cd), bismuth (Bi), and tin (Sn) fumes, as well as styrene and methyl chloride vapors. Area and personal breathing zone samples were collected for various steps in the block fabrication process. Only 3 of 16 air samples for metals resulted in detectable levels of Pb and/or Cd. The levels were well below the Occupational Safety and Health Administration (OSHA) Permissible Exposure Limits, excluding a sample which contained a visible metal fragment. Bi and Sn were not detected in any samples. Methyl chloride and styrene vapors were not detected in any air samples during foam cutting procedures. Total particulates (TP) were measurable in 11 of 17 air samples (ranging from 0.01 to 2.1 mg/m3). TP values were below the OSHA federal standard for nuisance particulates, which is 15 mg/m3. The data suggest that the materials and procedures sampled do not present an inhalation hazard to employees who construct shielding blocks. Precautions should, however, be exercised to prevent exposure under extreme procedural conditions such as soldering or overheating of alloy, and by other means such as ingestion. Care should also be taken during cleanup or housekeeping to prevent re-entrainment into the work atmosphere of mechanically generated metal particles or materials condensed within melting pots (which may be high in metal content).
C L DeMeyer; L W Whitehead; A P Jacobson; D G Brown
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Medical physics     Volume:  13     ISSN:  0094-2405     ISO Abbreviation:  Med Phys     Publication Date:    1986 Sep-Oct
Date Detail:
Created Date:  1987-01-22     Completed Date:  1987-01-22     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0425746     Medline TA:  Med Phys     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  748-50     Citation Subset:  IM    
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MeSH Terms
Air Pollutants, Occupational / adverse effects
Alloys / adverse effects
Maximum Allowable Concentration
Metals / adverse effects*
Radiation Protection / instrumentation*
United States
United States Occupational Safety and Health Administration
Reg. No./Substance:
0/Air Pollutants, Occupational; 0/Alloys; 0/Metals

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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