|Boston, Mass. — A study by emergency physicians at Children’s Hospital Boston provides a wake-up call to parents to get rid of their old glass thermometers. A 12-year review of patients seen in Children’s emergency department (ED) shows that glass thermometers pose one more safety hazard in addition to mercury exposure: injuries from broken glass.
Moreover, the incidence of glass thermometer injuries has only decreased minimally despite bans on mercury-containing glass thermometers in several states, including Massachusetts.
“Just because glass thermometers are not sold doesn’t mean people don’t have them in their homes,” says co-author Lois Lee, MD, MPH, of Children’s Division of Emergency Medicine, who also directs the hospital’s Injury Prevention Program. “They may not realize what the dangers are.”
Researchers reviewed records from Children’s ED from October 1995 to October 2007. During this period, the ED saw 33 patients with glass thermometer-related injuries, approximately one to six injuries per year (including three in 2007, despite the 2002 ban in Massachusetts). The findings are detailed in the October issue of Pediatric Emergency Care.
Out of all the patients treated:
|Amir Kimia, MD, of Children’s Division of Emergency Medicine, the study’s senior investigator, acknowledges that the numbers are small, but notes that these injuries are unnecessary and may require imaging to locate the glass, sometimes exposing children to radiation in the genital area if a rectal thermometer was used.
Though glass thermometers containing mercury may be more accurate than other kinds of thermometers, health professionals have recommended against their use once they recognized mercury as a risk. However, an unknown number of households that still have mercury thermometers have not discarded them. Meanwhile, several manufacturers have replaced the mercury in their glass thermometers with a non-toxic alternative, which still makes the thermometers a broken glass hazard despite making them mercury-free.
The authors of the study suggest that pediatricians discuss safer, non-glass thermometers with parents as part of well-child appointments or while talking about fever management. If parents are still insistent on using the most accurate thermometers, pediatricians should be prepared to discuss the different thermometers readily available. The difference in temperature readings is often within tenths of a degree–too small to justify exposing children to the risk of the thermometer breaking. “In reality, we don’t need that degree of accuracy,” Kimia says.
“Hospitals are using digital thermometers, which don’t contain glass, in their standard care,” Lee adds. “They’re accurate as well as being faster and therefore, easier to use, particularly in the younger children.”
Nadine Aprahamian, MD, of Children’s Division of Emergency Medicine was the first author of the study, titled “Glass Thermometer Injuries: It is Not Just About the Mercury.”
Founded in 1869 as a 20-bed hospital for children, Children’s Hospital Boston today is one of the nation’s leading pediatric medical centers, the primary pediatric teaching hospital of Harvard Medical School, and the largest provider of health care to Massachusetts children. In addition to 396 pediatric and adolescent inpatient beds and more than 100 outpatient programs, Children’s houses the world’s largest research enterprise based at a pediatric medical center, where its discoveries benefit both children and adults. More than 500 scientists, including eight members of the National Academy of Sciences, 11 members of the Institute of Medicine and 13 members of the Howard Hughes Medical Institute comprise Children’s research community. For more information about the hospital visit: www.childrenshospital.org/newsroom.
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