Document Detail


Personnel protection during aerosol ventilation studies using radioactive technetium (Tc99m)
MedLine Citation:
PMID:  7825514     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Two commercially available nebulizing devices used for ventilation studies were evaluated. The nebulizers use radioactive Technetium-99m (Tc99m), a potential source of room air contamination. Ambient air concentrations of Tc99m were monitored, as were the exposures of department personnel not performing ventilation studies. Room surfaces and air vents were examined to determine the extent of contamination in the examination room. Personnel were evaluated for contamination on clothing, hair, and airways when hospital lab coats and latex gloves were the only protective apparel used. Though the maximum permissible concentration of 4 x 10(-5) microCi/c3 was not exceeded, preliminary results indicated levels as high as 11,000 disintegrations/min in the nasal passages of personnel. These findings clearly demonstrate the need for more effective personal protective devices. Personnel contamination resulted primarily from the patient, due to an inability to maintain a proper oral seal on the nebulizer mouthpiece. Conventional hospital surgical masks were ineffective in reducing internal deposition to tolerable levels. By comparison, levels were reduced by 19% (p > 0.10) through use of methods such as simple body substance isolation techniques and high-efficiency disposable respirators. Levels approaching 50 disintegrations/min or less were obtainable (p < 0.001), and overall levels of Tc99m were reduced by 78%.
Authors:
R D Huff; P Horwitz; S J Klash
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American Industrial Hygiene Association journal     Volume:  55     ISSN:  0002-8894     ISO Abbreviation:  Am Ind Hyg Assoc J     Publication Date:  1994 Dec 
Date Detail:
Created Date:  1995-02-16     Completed Date:  1995-02-16     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0371160     Medline TA:  Am Ind Hyg Assoc J     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1144-8     Citation Subset:  IM    
Affiliation:
Buffalo General Hospital, NY 14203.
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MeSH Terms
Descriptor/Qualifier:
Aerosols
Disposable Equipment
Hospital Bed Capacity, 500 and over
Humans
Masks
Nebulizers and Vaporizers
New York
Nuclear Medicine Department, Hospital / standards*
Occupational Exposure / prevention & control*
Protective Clothing*
Respiratory Protective Devices
Respiratory Tract Diseases / radionuclide imaging
Technetium*
Chemical
Reg. No./Substance:
0/Aerosols; 7440-26-8/Technetium
Comments/Corrections
Comment In:
Am Ind Hyg Assoc J. 1996 Feb;57(2):202-4   [PMID:  8615328 ]

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