APPLICATION OF ELECTROMAGNETIC FLOW METER TECHNIQUE IN MAN
Abstract
Data show that mean flow rates and mean blood pressure in patients (without symptoms of ischemia during periods of rest) are essentially the same compared to a group without obstructed lesions. The stenotic segment expresses itself only as a damping factor, leading to typical changes in the characteristics of flow and pressure pattern. Normal patterns were reestablished approximately five minutes after opening a graft bypass. Peripheral hemodynamic insufficiencies which occur during exercise could be produced experimentally during the course of operation. The injection of vasodilatory drugs (prior to the insertion of a bypass graft) into the artery distal to the stenosis decreased vascular resistance to flow. Under this condition of increased blood flow demand, the stenosis became hemodynamically effective. A mean pressure gradient across the stenotic segment could now be demonstrated. The test was repeated after the graft was in place. When resistance to flow was decreased by the same amount, no gradient was detectable. The results of the effect of mannitol on renal blood flow given during operation are presented.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 31, 1963
- Accession Number
- AD0414013
Entities
People
- Klaus Thurau
Organizations
- University of Göttingen