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The Veterans Health Information Systems and Technology Architecture (VistA) is an enterprise-wide information system built around an Electronic Health Record (EHR), used throughout the United States Department of Veterans Affairs (VA) medical system, known as the Veterans Health Administration (VHA). It consists of nearly 160 integrated software modules for clinical care, financial functions, and infrastructure. The VHA manages the largest medical system in the United States,〔(【引用サイトリンク】url=http://yosemite.epa.gov/opa/admpress.nsf/8822edaadaba0243852572a000656841/66a4a31db7c1ae178525703d0067d18b!OpenDocument )〕 providing care to over 8 million veterans, employing 180,000 medical personnel and operating 163 hospitals, over 800 clinics, and 135 nursing homes throughout the continental U.S., Alaska, and Hawaii on a single electronic healthcare information network. Nearly 25% of the nation's population is potentially eligible for VA benefits and services because they are veterans, family members, or survivors of veterans.〔(【引用サイトリンク】url=http://www.va.gov/opa/publications/factsheets/fs_department_of_veterans_affairs.pdf )〕 Over 60% of all physicians trained in the U.S. rotate through the VHA on clinical electives, making VistA the most familiar and widely used EHR in the U.S. Nearly half of all U.S. hospitals that have a complete (inpatient/outpatient) enterprise-wide implementation of an EHR are VA hospitals using VistA.〔(【引用サイトリンク】url=http://linuxmednews.com/1238189242 )〕 ==Features== The Department of Veterans Affairs (VA) has had automated data processing systems, including extensive clinical and administrative capabilities, within its medical facilities since before 1985. Initially called the Decentralized Hospital Computer Program (DHCP) information system, DHCP was enshrined as a recipient of the Computerworld Smithsonian Award for best use of Information Technology in Medicine in 1995. VistA supports both ambulatory and inpatient care, and includes several significant enhancements to the original DHCP system. The most significant is a graphical user interface for clinicians known as the Computerized Patient Record System (CPRS), which was released in 1997. In addition, VistA includes computerized order entry, bar code medication administration, electronic prescribing, and clinical guidelines. CPRS provides a client–server interface that allows health care providers to review and update a patient's electronic medical record. This includes the ability to place orders, including those for medications, special procedures, X-rays, nursing interventions, diets, and laboratory tests. CPRS provides flexibility in a wide variety of settings so that a consistent, event-driven, Windows-style interface is presented to a broad spectrum of health care workers. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「VistA」の詳細全文を読む スポンサード リンク
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