PubMed · 7940321
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M Ebdrup. 1994-03-02. [Work environment--many can get compensation].. https://pubmed.ncbi.nlm.nih.gov/7940321/
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The developmental toxicity potential of a scrubbing solution used extensively in petroleum refineries to remove CO2 from hydrogen gas streams was evaluated via inhalation. Pregnant female CD (Sprague-Dawley) rats were exposed to aerosols of a "used" scrubbing solution at 0.05, 0.1, 0.2, or 0.3 mg/l for 6 h/d on d 6-19 of pregnancy. Control animals were exposed to filtered air under the same exposure conditions. Dams were sacrificed on d 20 of pregnancy and a laparohysterectomy was performed. The mass median aerodynamic diameter of the aerosol revealed that all particles ranged from 1.6 to 2.8 microm, with geometric standard deviations between 2.0 and 2.3 microm. The overall pregnancy rate was high (>95%) and equivalent across all groups. All pregnant dams had live litters, and 22-24 litters were examined in each group. Treatment-related clinical signs consisted of rales, observed at all exposure levels, and gasping noted only at the 0.3 mg/l exposure level. The occurrence of rales was presumably a localized effect on the respiratory tract and likely due to the irritating properties of the scrubbing solution. Maternal toxicity was exhibited in the 0.3 mg/l group, including reduced body weight, weight gain, and food consumption and one possible treatment-related death on gestation d 17. At scheduled necropsy, there were no treatment-related gross pathological observations and no statistically significant reproductive and developmental effects. The incidences of fetuses with skeletal variations involving the sternum were clustered in two litters at the highest exposure level with atypically low term fetal body weights. Under the conditions of this investigation, potassium carbonate scrubbing solution is not a selective developmental toxicant.
Agriculture has one of the highest occupational fatality rates of all U.S. industries. Since the mid-1970s, traditional small-bale balers have gradually been replaced by large-bale balers in the agriculture industry. Expanded use of these balers has resulted in worker exposure to new hazards not present during handling of traditional small bales; the larger size of the bales increases the potential for serious injury or death while workers handle them. During 1994-1996, seven persons in Minnesota died in separate incidents that involved large round hay bales (i.e., cylindrical bales approximately 5 feet in length with flat ends, diameters of approximately 6 feet, and weights ranging from 750 to 1500 lbs). The Minnesota Fatality Assessment and Control Evaluation program (MN FACE), a program sponsored by CDC's National Institute for Occupational Safety and Health (NIOSH), was notified of these incidents by the Minnesota Extension Service, a newspaper clipping service, and/or by death-certificate review. This report describes three incidents that were reported to MN FACE during 1994-1996, summarizes national surveillance for bale-associated deaths during 1980-1995, and provides recommendations to prevent fatalities associated with large bales.
The U.S. government currently publishes workplace fatality rates, using employment as the denominator. However, employment may not be a good proxy for worker exposure to risk if groups of workers differ in their hours worked. Using micro data from the Census of Fatal Occupational Injuries and Current Population Survey, this paper presents alternative fatality rates calculated using employment and hours worked. Rates are compared for worker groups defined by gender, age, occupation, and industry. In general, both measures identify the same groups of workers as facing especially high and low fatality risks. The rank correlation of the employment- and hours-based fatality rates for 222 detailed occupations is very high, with a value of 0.99. However, for a few groups, the hours- and employment-based rates may differ more than 10%. Most notably, workers below age 20 and above age 64 have rates that are 60% and 37% higher, respectively, when hours is used in the denominator. This suggests that hours--the conceptually preferable denominator--should be used when possible to calculate workplace fatality rates.