Richard K. Feldman

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The efficacy, safety, and effects on hemostasis and coagulation of two doses of human tissue-type plasminogen activator in patients with acute and subacute peripheral arterial occlusion were compared. Seven patients with lower extremity ischemia and one patient with upper extremity ischemia had peripheral arterial thromboses (five arteries, three grafts)(More)
BACKGROUND AND OBJECTIVES Standardized test doses have been established in the practice of anesthesiology to determine the location of the epidural catheter tip. The resulting data obtained after test dosing is open to interpretation, and comparison is difficult. A more objective method of catheter verification and epidural space measurement is indicated in(More)
This paper presents an analog phase detector, designed and applied as a reference instrument for automatic timing calibration. The circuit rapidly converts input signal times into easily measured voltages, with inherently good linearity and jitter rejection. It is easy to design and use, inexpensive, and offers some advantages over traditional measurement(More)
Using software to transform magnetic resonance imaging (MRI) tomographic data into three-dimensional projections, we have produced "angiograms" of the abdominal aorta in 18 patients with occlusive (15) and aneurysmal (3) disease. This information may be displayed to demonstrate flow, cross-sectional diameter, or aortic surface anatomy. To test the accuracy(More)
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