Drug bolus delivery system
US6635049B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1999 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | Apr 30, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/04
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An bolus delivery system includes an implantable pump, a sensor for sensing an adverse patient condition, such as atrial fibrillation, and a catheter for delivery of a bolus of drug to a target area of a living body. The pump is provided with a bolus metering assembly which includes, in a preferred embodiment, an auxiliary bellows defining a bolus reservoir in addition to the main reservoir of the pump. The auxiliary bellows is selectively placed in fluid communication with the pressurized main supply of drug via an inlet valve to refill the bolus reservoir. An outlet valve is provided to permit egress of the bolus to the catheter from the bolus reservoir. A drive train including a stepper motor and a face cam selectively opens and closes the inlet and outlet valves to effect accumulation or metering and delivery of the bolus. The auxiliary bellows is preferably provided as a collapsible element resiliently biased to an expanded position and is collapsed under pressure in the main reservoir to expel the bolus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.