Patient-controlled medication delivery system
US6270481A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 1999 |
| Grant date | Aug 7, 2001 |
| Priority date | — |
| Expiry date | Jun 16, 2019 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2005/3115
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A portable, patient-controlled medication delivery system includes an infusion pump, a catheter assembly and an extension tubing set. The infusion pump retains a treatment fluid and provides a drive mechanism for delivering the treatment fluid to a patient. The catheter assembly has a medicine catheter which penetrates directly into the treatment site of the patient and the extension tubing set has an extension tube which connects the medicine catheter and infusion pump. The infusion pump includes a fluid reservoir, a dosage chamber, and a displacement piston displacable within the dosage chamber. An elastic member is also positioned in the infusion pump to exert a displacement force on the displacement piston. The elastic member is alternately transitionable between a more stressed position and a less stressed position. The elastic member elastically displaces the displacement piston in a first direction to expand the dosage chamber and draw the treatment fluid from the fluid reservoir into the dosage chamber when the elastic member transitions from the more stressed position to the less stressed position. The displacement piston is manually displaced in a second direction to cont…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.