Implantable infusion pump with level measurement
First Claim
1. A compact implantable infusion pump comprising:
- a) a housing having a base plate and a propellant chamber disposed below the base plate, the base plate including a top and bottom surface and a depression formed in the base plate bottom surface, b) a bellow mechanism positioned within the housing propellant chamber underneath the housing base plate, the bellow mechanism having a base member and an internal volume, the bellow mechanism internal volume receiving a medicament for delivery into a patient'"'"'s body, c) a constriction section communicating with the bellow mechanism internal volume and a catheter disposed within the patient'"'"'s body for transferring the medicament into the patient'"'"'s body from the bellow mechanism internal volume through the catheter and into the patient'"'"'s body, and d) a resonant circuit including an inductance and a capacitance, the resonant circuit having a resonant frequency determined by a distance measured between the bellow mechanism base member and the housing base plate.
2 Assignments
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Accused Products
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.
22 Citations
19 Claims
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1. A compact implantable infusion pump comprising:
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a) a housing having a base plate and a propellant chamber disposed below the base plate, the base plate including a top and bottom surface and a depression formed in the base plate bottom surface, b) a bellow mechanism positioned within the housing propellant chamber underneath the housing base plate, the bellow mechanism having a base member and an internal volume, the bellow mechanism internal volume receiving a medicament for delivery into a patient'"'"'s body, c) a constriction section communicating with the bellow mechanism internal volume and a catheter disposed within the patient'"'"'s body for transferring the medicament into the patient'"'"'s body from the bellow mechanism internal volume through the catheter and into the patient'"'"'s body, and d) a resonant circuit including an inductance and a capacitance, the resonant circuit having a resonant frequency determined by a distance measured between the bellow mechanism base member and the housing base plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A compact implantable infusion pump comprising:
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a) a housing having a base plate and a propellant chamber disposed below the base plate, the base plate including a top and bottom surface and a depression formed in the base plate bottom surface, b) a bellow mechanism positioned within the housing propellant chamber underneath the housing base plate, the bellow mechanism having a base member and an internal volume, the base member having a bottom surface, the bellow mechanism internal volume receiving a medicament for delivery into a patient'"'"'s body, c) a constriction section communicating with the bellow mechanism internal volume and a catheter disposed within the patient'"'"'s body for transferring the medicament into the patient'"'"'s body from the bellow mechanism internal volume through the catheter and into the patient'"'"'s body, d) an electrical conductive coating disposed along the bellow mechanism base member bottom surface, e) a material cover disposed upon the housing base plate bottom surface, the material cover transparent to electromagnetic energy, and f) a resonant circuit including an inductance and a capacitance, a resonant frequency determined by a distance measured between the bellow mechanism base member and the housing base plate and a flat coil disposed within the depression. - View Dependent Claims (18, 19)
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Specification