Patent · US Expired

Implantable infusion pump with level measurement

US6755814B2 · kind B2 · utility

12Cited by

4References

19Claims

0Family size

Assignee

Codman Neuro Sciences Sarl · CH

Inventors

Manfred Wieland · Kiel, DE
Volker Zacharias · Kiel, DE
Jan Wierzoch · Rahden, DE

Key dates

Filing date	Feb 3, 2003
Grant date	Jun 29, 2004
Priority date	—
Expiry date	Feb 3, 2023

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61M5/1684
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The invention relates to an implantable infusion pump comprising a housing, a base plate, a propellant chamber, a bellows having an internal volume for receiving a medicament to be administered to a patient, a constriction segment leading to a catheter placed in the body of the patient and communicating with the bellows internal volume, a resonant circuit formed by a coil, and a capacitor detecting the distance between a bottom surface of the bellows and the base plate. The coil is mounted on or in a bottom surface of the base plate and pointing towards the bellows bottom surface such that an inductance of the coil and a resonant frequency of the resonant circuit is a function of the distance between the bellows bottom surface the base plate.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.