Garraway M, Dickson R, Whisnant J, Turney T
JAMA. 1985 Apr 26;253(16):2378-81.
The Mayo Clinic (Rochester, Minn) medical record linkage and indexing system was used to examine the impact of computed tomography (CT) on the diagnostic investigation, management, and outcome of all cases of subdural hematoma (SDH) that occurred in Olmsted County, Minnesota, from 1965 through 1980. Comparisons were made between an eight-year period prior to the introduction of CT (1965 through 1972) and a similar period after CT became available in this community (1973 through 1980). The advent of CT did not change the treatment, course of the disease, or prognosis of SDH. However, the introduction of CT had a marked effect on the pattern of neurological investigations carried out. This resulted in a 15% reduction in the cost of diagnosing SDH in this community, while the overall cost of health care in the United States rose by 87% during the same period.
利用梅奥诊所（明尼苏达州罗切斯特）的病历关联与索引系统，研究计算机断层扫描（CT）对1965年至1980年期间发生在明尼苏达州奥尔姆斯特德县的所有硬膜下血肿（SDH）病例的诊断检查、治疗及预后的影响。对引入CT之前的八年（1965年至1972年）与该社区CT可用后的类似时期（1973年至1980年）进行了比较。CT的出现并未改变SDH的治疗、病程或预后。然而，CT的引入对所进行的神经学检查模式产生了显著影响。这使得该社区诊断SDH的成本降低了15%，而同期美国的整体医疗保健成本上升了87%。
