Methods for capacitance volume correction in fluid delivery systems
US8403909B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2008 |
| Grant date | Mar 26, 2013 |
| Priority date | — |
| Expiry date | Aug 8, 2029 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3362
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Methods for capacitance volume correction in fluid-containing expandable bodies and associated fluid pathways are disclosed. The methods may be applied in fluid delivery systems used to supply fluids to patients during radiographic imaging procedures, including angiography. The methods control delivery of fluid to a downstream process, including providing a fluid-delivery expandable body and a pressurizing element in fluid communication with the downstream process, pressurizing the expandable body by moving the pressurizing element in the expandable body to reduce volume therein, determining an over-travel distance for the pressurizing element, and ceasing movement of the pressurizing element after allowing the pressurizing element to over-travel the over-travel distance to compensate for expansion of the expandable body under pressure. The expandable body may be a syringe and the pressurizing element may be a plunger disposed within the syringe. Movement of the pressurizing element may be controlled by an algorithm associated with a computer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.