Ellipticity measuring device
US8998827B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 13, 2013 |
| Grant date | Apr 7, 2015 |
| Priority date | — |
| Expiry date | Feb 13, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2025/1079
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A balloon catheter is used for dilating tubular members of the body such as dilating stenotic aortic valve leaflets found in the aortic root, and measuring the shape and dimensions of the annulus. The balloon has two larger diameter bulbous regions; one is positioned in the left ventricular outflow tract (LVOT) and the other in the aortic sinus; a smaller diameter waist region is positioned across the aortic annulus. During inflation of the balloon, the balloon waist expands in diameter until it comes into contact with the aortic annulus. The balloon pressure and inflation volume is monitored during inflation so that an inflection point in the dP/dV curve is seen at the point of contact of the waist with the annulus. Radiopaque rings and/or marker bands in the device allow the size and orientation of the elliptical annulus to be calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.