Kondrashov and Rothenberg (Appl. Radiat. Isot. 55 (2001) 799) have published "a substantial correction for calculating estimates of lead concentration and uncertainty for in vivo X-ray fluorescent bone analysis with Cd-109 source" (sic). Our paper shows that their correction fails to consider two important points that render it (i) a correction to a superseded method and (ii) of limited effect. Also, their approach to a "crude" estimate produces measurement uncertainties that are implausibly small. In order that they not be propagated in the literature, our paper also corrects several misstatements and errors in Kondrashov and Rothenberg.
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http://dx.doi.org/10.1016/s0969-8043(02)00267-1 | DOI Listing |
Int J Environ Res Public Health
April 2005
Department of Oral and Maxillofacial Surgery, Charles R. Drew University of Medicine and Sciences, Los Angeles, California, USA
Exposure to lead has been well recognized in a number of work environments, but little is known about lead exposure associated with machining brass keys containing lead. The brass that is widely used for key manufacturing usually contains 1.5% - 2.
View Article and Find Full Text PDFPhysiol Meas
February 2005
Department of Anesthesiology, Charles R Drew University, Los Angeles, CA 90059, USA.
We address a gap in the knowledge of lead turnover under conditions of prolonged bed rest and microgravity by developing a quantitative model of the amount of lead returned to blood circulation from bone. We offer the hypothesis that skeletal unloading, such as typically occurs during extended bed rest or microgravity, will result in bone lead being released to the blood, as has already been demonstrated in the case of calcium. We use initial bone lead concentrations to develop predictive models of blood lead elevation.
View Article and Find Full Text PDFAm J Epidemiol
April 2004
Department of Oral and Maxillofacial Surgery, Charles R. Drew University of Medicine and Science, Los Angeles, CA, USA.
The authors studied the time course and prevalence of elevated blood lead concentrations and associated injury- and patient-specific factors during the first year following gunshot injury. They determined blood lead levels at mean time points of 0.3, 3.
View Article and Find Full Text PDFJ Oral Maxillofac Surg
May 2003
Department of Oral and Maxillofacial Surgery, Charles R Drew University of Medicine and Sciences, Los Angeles, CA 90059, USA.
Purpose: The purpose of this study was to identify the contribution of ingested lead particles to elevated blood lead concentrations in victims of gunshot injury to the maxillofacial region.
Patients And Methods: As part of a larger study of the effects of retained lead bullets on blood lead, a retrospective review of study findings was completed on 5 of 8 patients who sustained injuries to the maxillofacial region. These 5 patients were recruited into the larger study within 11 days of injury and showed a penetration path for the projectile that engaged the upper aerodigestive tract.
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