Syringe pumps
US7635349B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2001 |
| Grant date | Dec 22, 2009 |
| Priority date | — |
| Expiry date | Nov 30, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/18
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A syringe pump has a motor rotating a leadscrew, which drives a plunger head retainer to push a plunger along the barrel of a syringe so as to dispense medication to a patient. A force sensor in the head retainer measures the force on the plunger to detect when there is an occlusion restricting flow of medication. When an excess force is detected an alarm is generated and the motor is reversed to reduce the force to about 10% of that at which the occlusion is detected. The occlusion can be removed with a reduced risk of a bolus of medication being dispensed after which the user restarts the pump so that the plunger is driven normally.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.