Findings from a national study of access to trauma centers vividly illustrate what many have suspected—some Americans have access to large numbers of trauma centers, while others have access to none.
Now, say leaders in emergency medicine, it's time to collect even more data and look more earnestly at how trauma care can be improved—not only by modifying the often politically driven placement of centers and transport, but also by examining and acting on issues of quality of care, financing, and manpower.
“This is very much a tip-of-the-iceberg analysis. [Access to trauma centers] is a huge issue, and it's important to get [these data] out there,” said Gregory Luke Larkin, M.D., immediate past chair of the American College of Emergency Physicians' Trauma and Injury Prevention Committee. Hopefully, the analysis will generate momentum in looking at access and other related issues, he added.
“It should be just the beginning of a conversation about trauma care,” said Dr. Larkin, professor of surgery, emergency medicine, and public health at the University of Texas Southwestern Medical Center at Dallas. “And it should give permission for folks to talk about it at a national level,” as well as within states, he said.
The investigators of the cross-sectional study, published last month in the Journal of the American Medical Association, found that almost 70% of all U.S. residents had access to a level I or level II trauma center within 45 minutes, and that approximately 84% had access within 60 minutes.
While almost 43 million of these residents—most living in urban areas—had access within an hour to 20 or more level I or II centers, almost 47 million—most in rural areas—had no such access to any centers.
Only 8% of rural residents—compared with 73% of suburban populations and 89% of urban populations—had access to level I and level II centers within 45 minutes. The percentages increased to 24%, 86%, and 95% when the time parameter was 60 minutes, the investigators reported (JAMA 2005:293;2626–33).
Beyond the Obvious
The study reveals much of “what we all knew intuitively,” said Jon R. Krohmer, M.D., medical director of Kent County EMS in Grand Rapids, Mich., and the ACEP liaison to the American College of Surgeons' Committee on Trauma.
It's significantly “innovative,” however, because the data sources are new and because investigators evaluated access in terms of population, as opposed to land area only. The researchers also measured access in terms of “prehospital time”—the time from receipt of an emergency call to hospital arrival—as opposed to distance or pure “transport time,” Dr. Krohmer said.
The investigators mainly used the January 2005 Trauma Center Inventory verified by the ACS Committee on Trauma, and the January 2005 version of the Atlas and Database of Air Medical Services.
“The study points out very graphically that there are areas that are potentially overserved, and areas that aren't served at all,” said Dr. Krohmer, an attending physician at Spectrum Health and medical director of Kent County EMS, both in Grand Rapids, Mich.
So, would a level I trauma center ever be built in Big Piney, Wyoming? “That's the million-dollar question,” he said. “And that's why this study should be the basis for future studies on quality of care and outcomes.
“We've asked, for instance, what is a minimal or acceptable patient volume to support a level I center? And right now, we don't have good answers,” Dr. Krohmer said.
Accessing Solutions
In their comments, the investigators question whether the access of some Americans to multiple trauma centers may be excessive, and whether “appropriate limits” on the number of centers could increase patient volumes and thus improve the quality of care—questions that both Dr. Krohmer and Dr. Larkin said are good ones.
The authors also emphasize the finding that 27% and 28% of U.S. residents had access—within 45 and 60 minutes, respectively—to level I and II centers by helicopter only.
“This, and the fact that base helipads are more moveable … makes them appealing as modifiable components of the trauma system,” wrote Charles C. Branas, Ph.D., an epidemiologist at the University of Pennsylvania, Philadelphia, and his associates.
National leadership on trauma care issues should also be better funded and more extensive, though “at this point, states need to get their systems (better) developed,” Dr. Branas told ACEP NEWS. States also need to make or strengthen arrangements for border crossings for day-to-day trauma care, he and his associates wrote.
Approximately 2%–3% of U.S. residents had access to level I and II trauma centers only via the centers and helicopters of neighboring states, the study showed. Most of the standardized interstate agreements for sharing resources, however, concern mass casualty incidents rather than day-to-day trauma care, the investigators said.