Positive pressure infusion system having downstream resistance measurement capability
US7255680B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 27, 1999 |
| Grant date | Aug 14, 2007 |
| Priority date | — |
| Expiry date | Oct 27, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/16868
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A fluid delivery system includes a first fluid container having infusion fluid for a patient. The first fluid container has an outlet and a conduit attached to the outlet. A second fluid container applies pressure to the first fluid container to force fluid out of the first container and into the conduit at a desired flow rate. A pressure sensor is coupled to the second fluid container and a flow sensor is coupled to the conduit. The processor monitors the flow rate and controls the duty cycle of a downstream flow control actuator to maintain the desired flow rate. The processor determines the downstream resistance of the system by varying the flow rate about the selected flow rate, receiving pressure signals from the pressure sensor and flow signals from the flow sensor, and calculating the change in pressure over the change in flow rate to produce the fluid resistance measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.