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Biomedical subjects

U Vaisman

Publications and source records attributed to U Vaisman.

3 recordsLinked to original sources

Innovative automation: the competitive/collaborative human factor.

In summary, a dual-group in-hospital Radiology practice by two competing groups is not only feasible, it is indeed a very viable and practical option, capable of producing numerous benefits to patients, practitioners, staffers and facilities. For the model to succeed, there has to be full cooperation on the part of the hospital administrative staff coupled with their firm mandate to facilitate such a progressive practice. Once the process is clearly and carefully explained to the support staff, with well-defined instructions and ground rules, implementation of the model becomes a matter of following a carefully detailed plan of operation. Our experience with this unique alignment produced challenges for all involved. Our Radiologists were tasked to evolve their practice techniques. As well, all our staff and administration were called to redesign, adapt and utilized at St. Elizabeth's Hospital. In our own way, we see our process of assessment, adaptation and implementation of the dual-group model as a schematic for the wellness of Radiology and perhaps even all of Medicine. Our unified focus to achieve a common goal for the good of all, most particularly our patients, has led us through the fog of fear and trepidation into the clarity of reward. Vision becomes reality through individual effort; and all who come through the doors of St. Elizabeth's, now reap its numerable rewards. And most particularly for our healthcare recipients, the one year experience of two competing groups of radiologists working side by side within the Radiology Department of a single hospital, without an exclusive contract, indicates that the model is successful and has no negative impact on patientcare.

Contract Services↗

Carotid artery disease: new criteria for evaluation by sonographic duplex scanning.

Use of established criteria in duplex sonographic screening for internal carotid artery disease resulted in low sensitivity (52%) and efficiency (82%). Analysis of duplex velocity data in 51 patients (102 vessels) led to the development of two new criteria for significantly diseased vessels: the ratio of the right to left peak systolic average velocities in the common carotid arteries (Vrcca/Vlcca) of less than 0.7 or greater than 1.3, and a peak systolic average velocity in the common carotid artery (Vcca) of less than 25 cm/sec. Addition of these criteria improved our sensitivity and efficiency to 95% and 94%, respectively.

Blood Flow Velocity↗

Abnormal abdominal computerized tomography with amiodarone therapy and clinical significance.

Although the antiarrhythmic agent, amiodarone, is known to cause elevation of liver function tests, the effect of this drug on abdominal computerized tomography (CT) scans in patients on amiodarone therapy is unknown. Since iodine is in its molecular structure, the presence of amiodarone or its metabolites might be expected to produce higher CT numbers similar to the effect of contrast agents. To test this hypothesis, CT scans were performed in a series of 25 patients receiving amiodarone, 14 receiving short-term (mean 2.5 +/- 1.3 days) and 19 receiving long-term therapy (mean 130 +/- 75 days), as well as in a control group not receiving amiodarone. Gastrointestinal symptoms (if any) and liver function tests (LFT) prior to instituting amiodarone therapy and at the time of CT scan were also documented. CT scans showed a modestly increased density in multiple organs in the short-term group, but a markedly increased hepatic density in all but one patient in the long-term group. Presence of gastrointestinal symptoms or abnormal LFT did not appear to correlate with the CT number. Such findings would suggest that increased hepatic density on CT scan is to be expected in patients receiving long-term amiodarone therapy, and although the exact biologic pathways of amiodarone metabolism are uncertain, the liver appears to be a major site of drug storage and/or metabolism.

Adult↗