Implantable drug delivery system

Details Implantable drug delivery system Implantable drug delivery system

A - Human Necessities

61

M

128/80

A61M 37/00 (2006.01) A61M 5/142 (2006.01)

Patent

CA 1333144

An infusion system includes an implantable housing having a storage reservoir that is dimensioned and arranged to contain a supply of a medication and a holding reservoir that is dimensioned and arranged to receive a dosage of the medication from the storage reservoir. A pump assembly is included for enabling a patient to cause a dosage of the medication to be transferred from the storage reservoir to the holding reservoir, and pressurizing components maintain the dosage under pressure within the holding reservoir in order to cause the dosage to discharge through an output port to the infusion location. One embodiment accomplishes this with an elongated bladder of elastomeric material in fluid communication with the storage reservoir and the output port. The bladder inflates as it fills with the dosage to maintain the dosage under pressure, and a capillary element disposed intermediate the bladder and the output port restricts the rate of discharge. This embodiment allows the dispensing of medication at a uniform constant flow rate.

594874

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