Patent US5531716A successfully refreshed from Google Patents.
US5531716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Medical devices subject to triggered disintegration
Assignee: Boston Scientific Scimed Inc
•
Filing: 1993-09-29
•
Granted: 1996-07-02
•
Expires: 2013-09-29
Abstract
Abstract The present invention provides medical devices comprised of ionically crosslinked polymer, especially, stents, catheter or cannula components, plugs, and constrictors. The medical devices of the present invention are prepared by treatment of ionically crosslinkable polymer compositions with crosslinking ion compositions to provide ionically crosslinked materials. An important aspect of the present invention is that these medical devices can be disintegrated in-vivo at a desired time through the exposure of the medical device to a chemical trigger which generally is described as an agent that acts to displace the crosslinking ion in the ionically crosslinked material through binding or simple replacement with a non-crosslinking ion.
Inventors
- 👤 Gary A. Luzio
- 👤 Samuel A. Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:21
CPC Classifications
A; A61; A61L; A61L31/00; A61L31/14; A61L31/148; A61L29/00; A61L29/14; A61L29/148; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2982; Y10T428/2984; Y10T428/2985; Y10T428/2987
Claims Analysis
Total Claims: 109
Claim 1
Independent Claim
43 words
A medical device comprising at least one member selected from the group consisting of stents, catheters, cannulas, plugs and constrictors, wherein said medical device comprises ionically crosslinked polymer and has sufficient mechanical strength to serve as a stent, catheter, cannula, plug or constrictor.
Claim 2
Dependent Claim
43 words
A medical device comprising at least one member selected from the group consisting of stents, catheters, cannulas, plugs and constrictors, wherein said medical device comprises ionically crosslinked polymer and has sufficient mechanical strength to serve as a stent, catheter, cannula, plug or constrictor.
Claim 3
Dependent Claim
36 words
The medical device of claim 1 wherein said ionically crosslinked polymer comprises at least one polymer made from at least one ionically crosslinkable polymer selected from the group consisting of carboxylic, sulfate and amine functionalized polymers.
Claim 4
Dependent Claim
22 words
The medical device of claim 1 wherein said ionically crosslinked polymer comprises at least one polymer made from at least one polysaccharide.
Claim 5
Dependent Claim
25 words
The medical device of claim 1 wherein said ionically crosslinked polymer comprises at least one polymer made from at least one ionically crosslinkable anionic polymer.
Claim 6
Dependent Claim
25 words
The medical device of claim 1 wherein said ionically crosslinked polymer comprises at least one polymer made from at least one ionically crosslinkable cationic polymer.
Claim 7
Dependent Claim
57 words
The medical device of claim 4 wherein said ionically crosslinked anionic polymer comprises at least one polymer made from at least one ionically crosslinkable polymer selected from the group consisting of polyacrylic acid, polymethacrylic acid, alginic acid, pectinic acid, carboxy methyl cellulose, hyaluronic acid, heparin, carboxymethyl starch, carboxymethyl dextran, heparin sulfate, and chondroitin sulfate, and salts thereof.
Claim 8
Dependent Claim
39 words
The medical device of claim 5 wherein said ionically crosslinked cationic polymer comprises at least one polymer made from at least one ionically crosslinkable polymer selected from the group consisting of chitosan, cationic guar, cationic starch and polyethylene amine.
Claim 9
Dependent Claim
42 words
The medical device of claim 4 wherein said ionically crosslinked anionic polymer comprises at least one polymer made from at least one ionically crosslinkable polymer selected from the group consisting of alginic acid, pectinic acid, carboxymethyl cellulose, hyaluronic acid, and salts thereof.
Claim 10
Dependent Claim
28 words
The medical device of claim 8 wherein said ionically crosslinked anionic polymer comprises at least one polymer made from the group consisting of alginic acid and salts thereof.
Claim 11
Dependent Claim
20 words
The medical device of claim 9 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises barium.
Claim 12
Dependent Claim
20 words
The medical device of claim 9 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises strontium.
Claim 13
Dependent Claim
20 words
The medical device of claim 9 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises copper.
Claim 14
Dependent Claim
20 words
The medical device of claim 9 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises lead.
Claim 15
Dependent Claim
23 words
The medical device of claim 1 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises one or more cations.
Claim 16
Dependent Claim
33 words
The medical device of claim 14 wherein said one or more cations are selected from the group consisting of calcium, magnesium, barium, strontium, boron, beryllium, aluminum, iron, copper, cobalt, lead, and silver ions.
Claim 17
Dependent Claim
20 words
The medical device of claim 15 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises barium.
Claim 18
Dependent Claim
20 words
The medical device of claim 15 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises strontium.
Claim 19
Dependent Claim
20 words
The medical device of claim 15 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises copper.
Claim 20
Dependent Claim
20 words
The medical device of claim 15 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises lead.
Claim 21
Dependent Claim
24 words
The medical device of claim 14 wherein said one or more cations are selected from the group consisting of calcium, iron, and aluminum ions.
Claim 22
Dependent Claim
15 words
The medical device of claim 14 wherein said one or more cations comprises calcium ion.
Claim 23
Dependent Claim
23 words
The medical device of claim 1 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises one or more anions.
Claim 24
Dependent Claim
28 words
The medical device of claim 13 wherein said one or more anions are selected from the group consisting of phosphate, citrate, borate, succinate, maleate, adipate and oxalate ions.
Claim 25
Dependent Claim
15 words
The medical device of claim 13 wherein said one or more anions comprises phosphate ion.
Claim 26
Dependent Claim
53 words
A medical device comprising at least one member selected from the group consisting of stents, catheters, cannulas, plugs, and constrictors, wherein said medical device comprises ionically crosslinked polymer in combination with an agent that displaces a crosslinking ion, and has sufficient mechanical strength to serve as a stent, catheter, cannula, plug or constrictor.
Claim 27
Dependent Claim
53 words
A medical device comprising at least one member selected from the group consisting of stents, catheters, cannulas, plugs, and constrictors, wherein said medical device comprises ionically crosslinked polymer in combination with an agent that displaces a crosslinking ion, and has sufficient mechanical strength to serve as a stent, catheter, cannula, plug or constrictor.
Claim 28
Dependent Claim
36 words
The medical device of claim 25 wherein said ionically crosslinked polymer comprises at least one polymer which is made from at least one polymer selected from the group consisting of carboxylic, sulfate and amine functionalized polymers.
Claim 29
Dependent Claim
24 words
The medical device of claim 25 wherein said ionically crosslinked polymer comprises at least one polymer which is made from at least one polysaccharide.
Claim 30
Dependent Claim
27 words
The medical device of claim 25 wherein said ionically crosslinked polymer comprises at least one polymer which is made from at least one ionically crosslinked anionic polymer.
Claim 31
Dependent Claim
27 words
The medical device of claim 25 wherein said ionically crosslinked polymer comprises at least one polymer which is made from at least one ionically crosslinked cationic polymer.
Claim 32
Dependent Claim
57 words
The medical device of claim 28 wherein said ionically crosslinked anionic polymer comprises at least one polymer which is made from one or more members selected from the group consisting of polyacrylic acid, polymethacrylic acid, alginic acid, pectinic acid, carboxy methyl cellulose, hyaluronic acid, heparin, carboxymethyl starch, carboxymethyl dextran, heparin sulfate, and chondroitin sulfate, and salts thereof.
Claim 33
Dependent Claim
28 words
The medical device of claim 30 wherein said ionically crosslinked anionic polymer comprises at least one polymer made from the group consisting of alginic acid and salts thereof.
Claim 34
Dependent Claim
20 words
The medical device of claim 31 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises barium.
Claim 35
Dependent Claim
20 words
The medical device of claim 31 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises strontium.
Claim 36
Dependent Claim
20 words
The medical device of claim 31 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises copper.
Claim 37
Dependent Claim
20 words
The medical device of claim 31 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises lead.
Claim 38
Dependent Claim
39 words
The medical device of claim 29 wherein said ionically crosslinked cationic polymer comprises at least one polymer which is made from one or more members selected from the group consisting of chitosan, cationic guar, cationic starch and polyethylene amine.
Claim 39
Dependent Claim
42 words
The medical device of claim 28 wherein said ionically crosslinked anionic polymer comprises at least one polymer which is made from one or more members selected from the group consisting of alginic acid, pectinic acid, carboxymethyl cellulose, hyaluronic acid and salts thereof.
Claim 40
Dependent Claim
23 words
The medical device of claim 25 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises one or more cations.
Claim 41
Dependent Claim
33 words
The medical device of claim 38 wherein said one or more cations are selected from the group consisting of calcium, magnesium, barium, strontium, boron, beryllium, aluminum, iron, copper, cobalt, lead, and silver ions.
Claim 42
Dependent Claim
20 words
The medical device of claim 39 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises barium.
Claim 43
Dependent Claim
20 words
The medical device of claim 39 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises strontium.
Claim 44
Dependent Claim
20 words
The medical device of claim 39 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises copper.
Claim 45
Dependent Claim
20 words
The medical device of claim 39 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises lead.
Claim 46
Dependent Claim
24 words
The medical device of claim 39 wherein said one or more cations are selected from the group consisting of calcium, iron, and aluminum ions.
Claim 47
Dependent Claim
15 words
The medical device of claim 39 wherein said one or more cations is calcium ion.
Claim 48
Dependent Claim
23 words
The medical device of claim 25 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises one or more anions.
Claim 49
Dependent Claim
28 words
The medical device of claim 46 wherein said one or more anions are selected from the group consisting of phosphate, citrate, borate, succinate, maleate, adipate and oxalate ions.
Claim 50
Dependent Claim
15 words
The medical device of claim 46 wherein said one or more anions is phosphate ion.
Claim 51
Dependent Claim
52 words
The medical device of claim 46 wherein said agent that displaces a crosslinking ion comprises one or more members selected from the group consisting of ethylene diamine tetra acetic acid, ethylene diamine tetraacetate, citrate, organic phosphates, inorganic phosphates, trisodium carboxymethyloxysuccinate, nitrilotriacetic acid, maleic acid, oxalate, polyacrylic acid, sodium, potassium, calcium and magnesium.
Claim 52
Dependent Claim
13 words
The medical device of claim 49 wherein said organic phosphate is cellulose phosphate.
Claim 53
Dependent Claim
29 words
The medical device of claim 49 wherein said inorganic phosphate is selected from the group consisting of pentasodium tripolyphosphate, mono and di-basic potassium phosphate, sodium pyrophosphate and phosphoric acid.
Claim 54
Dependent Claim
32 words
The medical device of claim 25 wherein said agent that displaces a crosslinking ion comprises one or more members selected from the group consisting of citrates, inorganic phosphates, sodium, potassium and magnesium.
Claim 55
Dependent Claim
25 words
The medical device of claim 25 wherein said agent that displaces a crosslinking ion is selected from the group consisting of inorganic phosphates and magnesium.
Claim 56
Dependent Claim
52 words
A medical device comprising at least one member selected from the group consisting of stents, catheters, cannulas, plugs, and constrictors, wherein said medical device comprises ionically crosslinked polymer hydrogel having a water content of less than 90% and has sufficient mechanical strength to serve as a stent, catheter, cannula, plug or constrictor.
Claim 57
Dependent Claim
52 words
A medical device comprising at least one member selected from the group consisting of stents, catheters, cannulas, plugs, and constrictors, wherein said medical device comprises ionically crosslinked polymer hydrogel having a water content of less than 90% and has sufficient mechanical strength to serve as a stent, catheter, cannula, plug or constrictor.
Claim 58
Dependent Claim
20 words
The medical device of claim 54 wherein said ionically crosslinked polymer hydrogel has a water content of less than 85%.
Claim 59
Dependent Claim
20 words
The medical device of claim 54 wherein said ionically crosslinked polymer hydrogel has a water content of less than 80%.
Claim 60
Dependent Claim
20 words
The medical device of claim 54 wherein said ionically crosslinked polymer hydrogel has a water content of less than 70%.
Claim 61
Dependent Claim
20 words
The medical device of claim 54 wherein said ionically crosslinked polymer hydrogel has a water content of less than 60%.
Claim 62
Dependent Claim
36 words
The medical device of claim 54 wherein said ionically crosslinked polymer comprises at least one polymer made from at least one ionically crosslinkable polymer selected from the group consisting of carboxylic, sulfate and amine functionalized polymers.
Claim 63
Dependent Claim
22 words
The medical device of claim 54 wherein said ionically crosslinked polymer comprises at least one polymer made from at least one polysaccharide.
Claim 64
Dependent Claim
25 words
The medical device of claim 54 wherein said ionically crosslinked polymer comprises at least one polymer made from at least one ionically crosslinkable anionic polymer.
Claim 65
Dependent Claim
25 words
The medical device of claim 54 wherein said ionically crosslinked polymer comprises at least one polymer made from at least one ionically crosslinkable cationic polymer.
Claim 66
Dependent Claim
57 words
The medical device of claim 61 wherein said ionically crosslinked anionic polymer comprises at least one polymer made from at least one ionically crosslinkable polymer selected from the group consisting of polyacrylic acid, polymethacrylic acid, alginic acid, pectinic acid, carboxy methyl cellulose, hyaluronic acid, heparin, carboxymethyl starch, carboxymethyl dextran, heparin sulfate, and chondroitin sulfate, and salts thereof.
Claim 67
Dependent Claim
28 words
The medical device of claim 62 wherein said ionically crosslinked anionic polymer comprises at least one polymer made from the group consisting of alginic acid and salts thereof.
Claim 68
Dependent Claim
20 words
The medical device of claim 64 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises barium.
Claim 69
Dependent Claim
20 words
The medical device of claim 64 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises strontium.
Claim 70
Dependent Claim
20 words
The medical device of claim 64 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises copper.
Claim 71
Dependent Claim
20 words
The medical device of claim 64 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises lead.
Claim 72
Dependent Claim
39 words
The medical device of claim 62 wherein said ionically crosslinked cationic polymer comprises at least one polymer made from at least one ionically crosslinkable polymer selected from the group consisting of chitosan, cationic guar, cationic starch and polyethylene amine.
Claim 73
Dependent Claim
42 words
The medical device of claim 61 wherein said ionically crosslinked anionic polymer comprises at least one polymer made from at least one ionically crosslinkable polymer selected from the group consisting of alginic acid, pectinic acid, carboxymethyl cellulose, hyaluronic acid, and salts thereof.
Claim 74
Dependent Claim
23 words
The medical device of claim 54 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises one or more cations.
Claim 75
Dependent Claim
33 words
The medical device of claim 71 wherein said one or more cations are selected from the group consisting of calcium, magnesium, barium, strontium, boron, beryllium, aluminum, iron, copper, cobalt, lead, and silver ions.
Claim 76
Dependent Claim
20 words
The medical device of claim 72 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises barium.
Claim 77
Dependent Claim
20 words
The medical device of claim 72 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises strontium.
Claim 78
Dependent Claim
20 words
The medical device of claim 72 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises copper.
Claim 79
Dependent Claim
20 words
The medical device of claim 72 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises lead.
Claim 80
Dependent Claim
24 words
The medical device of claim 71 wherein said one or more cations are selected from the group consisting of calcium, iron, and aluminum ions.
Claim 81
Dependent Claim
15 words
The medical device of claim 73 wherein said one or more cations is calcium ion.
Claim 82
Dependent Claim
23 words
The medical device of claim 54 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises one or more anions.
Claim 83
Dependent Claim
28 words
The medical device of claim 79 wherein said one or more anions are selected from the group consisting of phosphate, citrate, borate, succinate, maleate, adipate and oxalate ions.
Claim 84
Dependent Claim
15 words
The medical device of claim 79 wherein said one or more anions is phosphate ion.
Claim 85
Dependent Claim
57 words
A medical device comprising at least one member selected from the group consisting of stents, catheters, cannulas, plugs, and constrictors, wherein said medical device comprises ionically crosslinked polymer and is sterilizable at temperatures of at least 121° C., and wherein said medical device has sufficient mechanical strength to serve as a stent, catheter, cannula, plug or constrictor.
Claim 86
Dependent Claim
57 words
A medical device comprising at least one member selected from the group consisting of stents, catheters, cannulas, plugs, and constrictors, wherein said medical device comprises ionically crosslinked polymer and is sterilizable at temperatures of at least 121° C., and wherein said medical device has sufficient mechanical strength to serve as a stent, catheter, cannula, plug or constrictor.
Claim 87
Dependent Claim
36 words
The medical device of claim 82 wherein said ionically crosslinked polymer comprises at least one polymer made from at least one ionically crosslinkable polymer selected from the group consisting of carboxylic, sulfate and amine functionalized polymers.
Claim 88
Dependent Claim
22 words
The medical device of claim 82 wherein said ionically crosslinked polymer comprises at least one polymer made from at least one polysaccharide.
Claim 89
Dependent Claim
25 words
The medical device of claim 82 wherein said ionically crosslinked polymer comprises at least one polymer made from at least one ionically crosslinkable anionic polymer.
Claim 90
Dependent Claim
25 words
The medical device of claim 82 wherein said ionically crosslinked polymer comprises at least one polymer made from at least one ionically crosslinkable cationic polymer.
Claim 91
Dependent Claim
57 words
The medical device of claim 85 wherein said ionically crosslinked artionic polymer comprises at least one polymer made from at least one ionically crosslinkable polymer selected from the group consisting of polyacrylic acid, polymethacrylic acid, alginic acid, pectinic acid, carboxy methyl cellulose, hyaluronic acid, heparin, carboxymethyl starch, carboxymethyl dextran, heparin sulfate, and chondroitin sulfate, and salts thereof.
Claim 92
Dependent Claim
28 words
The medical device of claim 87 wherein said ionically crosslinked anionic polymer comprises at least one polymer made from the group consisting of alginic acid and salts thereof.
Claim 93
Dependent Claim
20 words
The medical device of claim 88 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises barium.
Claim 94
Dependent Claim
20 words
The medical device of claim 88 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises strontium.
Claim 95
Dependent Claim
20 words
The medical device of claim 88 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises copper.
Claim 96
Dependent Claim
20 words
The medical device of claim 88 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises lead.
Claim 97
Dependent Claim
39 words
The medical device of claim 86 wherein said ionically crosslinked cationic polymer comprises at least one polymer made from at least one ionically crosslinkable polymer selected from the group consisting of chitosan, cationic guar, cationic starch and polyethylene amine.
Claim 98
Dependent Claim
42 words
The medical device of claim 83 wherein said ionically crosslinked anionic polymer comprises at least one polymer made from at least one ionically crosslinkable polymer selected from the group consisting of alginic acid, pectinic acid, carboxymethyl cellulose, hyaluronic acid, and salts thereof.
Claim 99
Dependent Claim
23 words
The medical device of claim 82 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises one or more cations.
Claim 100
Dependent Claim
33 words
The medical device of claim 95 wherein said one or more cations are selected from the group consisting of calcium, magnesium, barium, strontium, boron, beryllium, aluminum, iron, copper, cobalt, lead, and silver ions.
Claim 101
Dependent Claim
20 words
The medical device of claim 96 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises barium.
Claim 102
Dependent Claim
20 words
The medical device of claim 96 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises strontium.
Claim 103
Dependent Claim
20 words
The medical device of claim 96 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises copper.
Claim 104
Dependent Claim
20 words
The medical device of claim 96 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises lead.
Claim 105
Dependent Claim
24 words
The medical device of claim 96 wherein said one or more cations are selected from the group consisting of calcium, iron, and aluminum ions.
Claim 106
Dependent Claim
15 words
The medical device of claim 96 wherein said one or more cations is calcium ion.
Claim 107
Dependent Claim
23 words
The medical device of claim 82 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises one or more anions.
Claim 108
Dependent Claim
38 words
The medical device of claim 103 wherein said ionically crosslinked polymer is crosslinked by a crosslinking ion which comprises one or more anions selected from the group consisting of phosphate, citrate, borate, succinate, maleate, adipate and oxalate ions.
Claim 109
Dependent Claim
15 words
The medical device of claim 104 wherein said one or more anions is phosphate ion.
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