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Biomedical subjects

C N Pfeil

Publications and source records attributed to C N Pfeil.

4 recordsLinked to original sources
PubMed1991

Use of DHCP to provide essential information for care and management of HIV patients.

The Department of Veterans' Affairs (VA) has reported over 10,000 Acquired Immune Deficiency Syndrome (AIDS) cases since the beginning of the epidemic. These cases were distributed throughout 152 of the VA's network of 172 medical centers and outpatient clinics. This network of health care facilities presents a unique opportunity to provide computer based information systems for clinical care and resource monitoring for these patients. The VA further facilitates such a venture through its commitment to the Decentralized Hospital Computer Program (DHCP). This paper describes a new application within DHCP known as the VA's HIV Registry. This project addresses the need to support clinical information as well as the added need to manage the resources necessary to care for HIV patients.

Databases, Factual↗
PubMed1981

Left ventricular ejection fraction calculated from volumes and areas: underestimation by area method.

The ejection fraction is one of the most widely used measurements of left ventricular systolic function. Angiographic measurement of ejection fraction is based on determination of roentgenographic magnification and calculation of end-diastolic and end-systolic volumes, assuming a prolated ellipse. Because it is simple and radiographic magnification may not have been determined, some laboratories have obtained an "ejection fraction" by comparison of end-diastolic and end-systolic areas. A comparison of the two methods was made using ventriculograms of 538 patients from three cardiac catheterization laboratories. The area method of ejection fraction calculation consistently underestimates ejection fraction from left ventricular volumes. A regression equation was derived that allows adjustment of the ejection fraction obtained from areas to that from volumes.

Blood Volume Determination↗
PubMed1980

A minicomputer network for diverse operating systems and languages.

Minicomputer networks have been proposed as a method of cost-effectively sharing system resources (data, programs, peripherals, etc.). The greatest impediment to the realization of such networks lies in the diversity of operating systems, languages, and input/output conventions now in use. An approach is described that makes possible the automatic sharing of data and resources among a variety of operating environments supporting multiple languages.

Cardiac Catheterization↗