Device for measuring the impedance to flow of a natural or prosthetic vessel in a living body
US5014715A · kind A · utility
39Cited by
6References
23Claims
0Family size
Inventor
Key dates
| Filing date | Nov 22, 1988 |
| Grant date | May 14, 1991 |
| Priority date | — |
| Expiry date | Nov 22, 2008 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/418
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A highly automated device to measure the impedance to fluid flow of a vessel by means of direct injection at normal physiologic pressures. The device produces objective impedance data including dynamic impedance, capacitance, and Direct Current resistance, without operator induced error. The device can be used for intraoperative impedance measurements by directly cannulating the vessel under study. Non-operative impedance measurement is performed by means of percutaneous catheters. The device can also inject imaging materials or a lytic solution into the vessel while also measuring vessel impedance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.