Implantable, refillable infusion device and septum replacement kit
First Claim
1. An implantable infusion device, comprising:
- A. a housing having (a) an annular portion with an inner wall defining an interior region having a width dimension D and extending along a central axis, (b) a bottom portion extending from said annular portion and spanning a first end of said interior region, and (c) a top portion extending from said annular portion and spanning a second end of said interior region, said top portion being opposite said bottom portion, wherein said interior region is substantially closed; and
B. a closed fluid-impermeable hollow bellows extending from one of the top and bottom portions of the housing and defining a variable volume region therein and having a plurality of serially coupled annular members extending between top and bottom portions of the bellows, wherein junctions of said coupled annular members are coupled with flexures, said bellows having a maximum outer width dimension D′
where D′
is less than D, wherein the portion of the housing from which the bellows extends includes a substantially planar annular peripheral portion disposed about a central portion, wherein a pressure source is contained within said variable volume region of said bellows, and wherein said bellows is disposed within said interior region of said housing and rigidly coupled to said portion of the housing from which the bellows extends, whereby said annular members of said bellows are spaced apart from said annular portion of said housing, wherein said housing includes a recharging fluid flow path from points external to said housing to a region adjacent to said central portion of said portion of said housing from which the bellows extends, and wherein said housing further defines a fluid exit flow path extending from the region between said bellows and said annular portion of said housing to points external to said housing.
1 Assignment
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Accused Products
Abstract
An implantable infusion device includes a lightweight, inert housing which contains an infusate for administration to a patient, and an enclosed, gas-impermeable variable volume chamber which contains a pressure source, such as propellant, mechanical spring, or the like. The variable volume chamber may be in the form of a rigid-walled expandable bellows structure or a nonstretchable flexible bag and is attached to the housing so as not to obstruct the entry port for introduction of infusate. The infusate is delivered from the device via a catheter in response to expansion of the variable volume chamber against the volume of infusate in the housing. A separate bolus injection port is provided which allows infusate to be safely introduced directly into the catheter and overrides the controlled pressure-driven delivery. The lightweight housing may include integrally formed needle stops and suture fastening loops.
131 Citations
42 Claims
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1. An implantable infusion device, comprising:
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A. a housing having (a) an annular portion with an inner wall defining an interior region having a width dimension D and extending along a central axis, (b) a bottom portion extending from said annular portion and spanning a first end of said interior region, and (c) a top portion extending from said annular portion and spanning a second end of said interior region, said top portion being opposite said bottom portion, wherein said interior region is substantially closed; and
B. a closed fluid-impermeable hollow bellows extending from one of the top and bottom portions of the housing and defining a variable volume region therein and having a plurality of serially coupled annular members extending between top and bottom portions of the bellows, wherein junctions of said coupled annular members are coupled with flexures, said bellows having a maximum outer width dimension D′
where D′
is less than D, wherein the portion of the housing from which the bellows extends includes a substantially planar annular peripheral portion disposed about a central portion, wherein a pressure source is contained within said variable volume region of said bellows, and wherein said bellows is disposed within said interior region of said housing and rigidly coupled to said portion of the housing from which the bellows extends, whereby said annular members of said bellows are spaced apart from said annular portion of said housing,wherein said housing includes a recharging fluid flow path from points external to said housing to a region adjacent to said central portion of said portion of said housing from which the bellows extends, and wherein said housing further defines a fluid exit flow path extending from the region between said bellows and said annular portion of said housing to points external to said housing. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An implantable infusion device, comprising:
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A. a housing having (a) an annular portion with an inner wall defining an interior region having a width dimension D and extending along a central axis, (b) a bottom portion extending from said annular portion and spanning a first end of said interior region, and (c) a top portion extending from said annular portion and spanning a second end of said interior region, said top portion being opposite said bottom portion, wherein said interior region is substantially closed; and
B. a closed fluid-impermeable hollow bellows disposed about a variable volume region and having a top member, a bottom member, and a plurality of serially coupled annular members extending therebetween, wherein junctions of said coupled annular members are coupled with flexures, said bellows having a maximum outer width dimension D′
where D′
is less than D, wherein at least one of said top and bottom members includes a substantially planar annular peripheral portion disposed about a central portion, wherein a pressure source is contained within said variable volume region of said bellows, and wherein said bellows is disposed within said interior region of said housing with one of said top and bottom members facing and rigidly coupled to a corresponding portion of said housing, whereby said annular members of said bellows are spaced apart from said annular portion of said housing,wherein said housing includes a recharging fluid flow path from points external to said housing to a region adjacent to said central portion of one of said top and bottom members of said bellows, and wherein the region of coupling between said housing and said bellows defines a fluid dispersal flow path from said region adjacent to said central portion of said coupled member of said bellows to a region between said annular members of said bellows and said annular portion of said housing, and wherein said housing further defines a fluid exit flow path extending from the region between said bellows and said annular portion of said housing to points external to said housing. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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38. An implantable infusion device, comprising:
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A. a housing having (a) an annular portion with an inner wall defining an interior region having a width dimension D and extending along a central axis, (b) a bottom portion extending from said annular portion and spanning a first end of said interior region, and (c) a top portion extending from said annular portion and spanning a second end of said interior region, said top portion being opposite said bottom portion, wherein said interior region is substantially closed;
B. a closed fluid-impermeable hollow bellows extending from one of the top and bottom portions of the housing and defining a variable volume- region therein and having a plurality of serially coupled annular members extending between top and bottom portions of the bellows, wherein junctions of said coupled annular members are coupled with flexures, said bellows having a maximum outer width dimension D′
where D′
is less than D, wherein the portion of the housing from which the bellows extends includes a substantially planar annular peripheral portion disposed about a central portion, wherein a pressure source is contained within said variable volume region of said bellows, and wherein said bellows is disposed within said interior region of said housing and rigidly coupled to said portion of the housing from which the bellows extends, whereby said annular members of said bellows are spaced apart from said annular portion of said housing, wherein said housing includes a recharging fluid flow path from points external to said housing to a region adjacent to said central portion of said portion of said housing from which the bellows extends, and wherein said housing further defines a fluid exit flow path extending from the region between said bellows and said annular portion of said housing to points external to said housing; and
C. a separate bolus port in fluid communication with said fluid exit flow path, wherein said bolus port includes a pair of septa disposed therein and spaced apart to define a bolus reservoir therebetween, wherein a delivery needle having an opening near the center of its length is required to deliver infusate to the bolus reservoir.
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39. An implantable infusion device, comprising:
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A. a housing having (a) an annular portion with an inner wall defining an interior region having a width dimension D and extending along a central axis, (b) a bottom portion extending from said annular portion and spanning a first end of said interior region, and (c) a top portion extending from said annular portion and spanning a second end of said interior region, said top portion being opposite said bottom portion, wherein said interior region is substantially closed;
B. a closed fluid-impermeable hollow bellows disposed about a variable volume region and having a top member, a bottom member, and a plurality of serially coupled annular members extending therebetween, wherein junctions of said coupled annular members are coupled with flexures, said bellows having a maximum outer width dimension D′
where D′
is less than D, wherein at least one of said top and bottom members includes a substantially planar annular peripheral portion disposed about a central portion, wherein a pressure source is contained within said variable volume region of said bellows, and wherein said bellows is disposed within said interior region of said housing with one of said top and bottom members facing and rigidly coupled to a corresponding portion of said housing, whereby said annular members of said bellows are spaced apart from said annular portion of said housing, wherein said housing includes a recharging fluid flow path from points external to said housing to a region adjacent to said central portion of one of said top and bottom members of said bellows, and wherein the region of coupling between said housing and said bellows defines a fluid dispersal flow path from said region adjacent to said central portion of said coupled member of said bellows to a region between said annular members of said bellows and said annular portion of said housing, and wherein said housing further defines a fluid exit flow path extending from the region between said bellows and said annular portion of said housing to points external to said housing; and
C. a separate bolus port in fluid communication with said fluid exit flow path, wherein said bolus port includes a pair of septa disposed therein and spaced apart to define a bolus reservoir therebetween, wherein a delivery needle having an opening near the center of its length is required to deliver infusate to the bolus reservoir.
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40. A septum replacement kit for an enclosed device which is sealed with a septum,
wherein the enclosed device defines a fluid reservoir, a fluid flow inlet and a fluid flow outlet, the kit comprising: -
a compressible septum adapted to sealingly engage in the fluid flow inlet of the reservoir; and
a septum installation tool adapted to compress the septum to a nominal insertion size, maintain said nominal insertion size of said septum prior to installation of the septum, and install the septum in the fluid flow inlet of the reservoir. - View Dependent Claims (41, 42)
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Specification