Reduced size implantable pump
First Claim
Patent Images
1. An implantable device for dispensing an active substance to a patient comprising:
- a housing defining an active substance chamber in fluid communication with an outlet for delivering said active substance to a target site within said patient, and a propellant chamber adjacent said active substance chamber; and
, an undulating flexible membrane separating said active substance and propellant chambers, wherein said active substance chamber has an undulating surface including a central convex portion flanked by at least two concave portions, said undulating surface cooperating with said undulating flexible membrane.
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Abstract
A variable hydraulic resistor for use with implantable pumps is disclosed. The variable hydraulic resistor according to the present invention is particularly useful in varying the flow rate of a medication fluid from an otherwise constant flow implantable pump. An implantable pump is also disclosed, which does not require a complicated clinching system or the like, and which may include an undulating membrane and chamber design to reduce the height of the pump.
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Citations
66 Claims
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1. An implantable device for dispensing an active substance to a patient comprising:
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a housing defining an active substance chamber in fluid communication with an outlet for delivering said active substance to a target site within said patient, and a propellant chamber adjacent said active substance chamber; and
,an undulating flexible membrane separating said active substance and propellant chambers, wherein said active substance chamber has an undulating surface including a central convex portion flanked by at least two concave portions, said undulating surface cooperating with said undulating flexible membrane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An implantable device for dispensing an active substance to a patient comprising:
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a housing defining a chamber and an outlet in fluid communication with the chamber for delivering said active substance to a target site within said patient, said housing having a first portion and a second portion, wherein the first portion and the second portion are constructed of PEEK and screwed together. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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53. An implantable device for dispensing an active substance comprising:
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a housing including a top portion, a bottom portion and a locking portion, said housing defining a propellant chamber and an active substance chamber in fluid communication with an outlet; and
a membrane retained between said top and bottom portions, said membrane separating said active substance and propellant chambers, wherein said top and bottom portions are placed together and said locking portion engages one of said top or bottom portions to retain said top and bottom portions together. - View Dependent Claims (54, 55, 56, 57, 58, 59, 60, 61)
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62. A method of assembling a reduced size implantable pump comprising:
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placing together a top portion and a bottom portion to retain a membrane therebetween; and
screwing a locking portion into said top portion or said bottom portion to retain said top and bottom portions together. - View Dependent Claims (63, 64, 65, 66)
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Specification