EP0791332A1
Expired / Lapsed
EP
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A perfusion device for maintaining blood flow in a vessel while isolating an anastomosis
Assignee: Cardiothoracic Systems LLC
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Filing: 1997-02-20
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Granted: —
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Expires: 2017-02-20
Abstract
Abstract A plurality of embodiments of a distal perfusion device are disclosed, which device facilitates anastomosis constructions by maintaining a dry anastomosis site while simultaneously maintaining blood flow distally in the blood vessel to prevent ischemia and reduce overall patient trauma. The perfusion device is configured for installation into a blood vessel such as a left anterior descending coronary artery through an incision therein, to which is to be grafted a distal end of a blood vessel such as an internal mammary artery. The device includes a central member of selected configuration and material, terminating at either end thereof in respective selectively tapered end members. A lumen extending through the central member and end members, and selected perforations in the end members, maintain blood flow through the perfusion device. A selected portion or portions of the device's outer circumference fit snugly within the artery in the regions beyond and/or at the anastomosis site, to maintain the latter free of blood. Several methods for deploying and removing respective embodiments of the device also are illustrated.
Inventors
- 👤 Charles S. Taylor
- 👤 Alfredo R. Cantu
- 👤 Son M. Gia
- 👤 Jeff A. Krolik
- 👤 Robert G. Matheny
- 👤 Amr. Salahieh
- 👤 Ivan Sepetka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 22:50
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/11; A61B17/12; A61B17/12022; A61B17/12027; A61B17/1204; A61B17/12045; A61B17/12099; A61B17/12109; A61B17/12131; A61B17/12136; A61B17/12181; A61B17/1219; A61B17/04; A61B17/0469; A61B2017/1135; A61B2017/12127
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
47 words
A distal perfusion device for maintaining flow in a vessel having an incision in said vessel comprising: a central member containing a lumen, said central member having end members affixed thereto and perfusion openings in communication with said lumen to maintain the blood flow through said vessel.
Claim 2
Dependent Claim
26 words
The device of claim 1 further comprising: selectively tapered end members coaxially extending from each end of the central member to facilitate insertion of the device.
Claim 3
Dependent Claim
18 words
The device of claim 1 further comprising a tip in each end member distal to said perfusion openings.
Claim 4
Dependent Claim
23 words
The device of claim 1 including: means for providing an enlarged diameter of said device upon insertion of the device within said vessel.
Claim 5
Dependent Claim
43 words
The device of claim 4 wherein said means for providing an enlarged diameter are comprised of enlarged annular rings proximate to said end members and having said perfusion openings are located between said enlarged annular rings and a tip in each end member.
Claim 6
Dependent Claim
30 words
The device of claim 4 wherein said means for providing an enlarged diameter are comprised of annular ridges of expandable form disposed about the central member and expandable radially outward.
Claim 7
Dependent Claim
19 words
The device of claim 6 wherein: said annular ridges of expandable form are coated with a permeable to liquid.
Claim 8
Dependent Claim
23 words
The device of claim 6 wherein said perfusion openings traverse said device to place said expandable form in fluid communication with said lumen.
Claim 9
Dependent Claim
15 words
The device of claim 6 wherein said expandable foam is covered with a semi-permeable sheath.
Claim 10
Dependent Claim
22 words
The device of claim 6 wherein said expandable foam is covered with sheath means which are releasably affixed to said sheath means.
Claim 11
Dependent Claim
14 words
The device of claim 10 wherein said sheath means is attached to a thread.
Claim 12
Dependent Claim
17 words
The device of claim 11 wherein said thread is positioned by guides attached to said central member.
Claim 13
Dependent Claim
47 words
The device of claim 4 wherein: said means for providing an enlarged diameter is formed of an inflatable balloon which upon inflation engages the interior of said vessel, and wherein said device is further comprised of a tip in each end member distal to said perfusion openings.
Claim 14
Dependent Claim
35 words
The device of claim 4 wherein: said means for providing an enlarged diameter is formed of a hydrophilic polymer material which expands upon converting to a hydrogel material in the presence of an aqueous fluid.
Claim 15
Dependent Claim
25 words
The device of claim 1 wherein: said central member is formed of a radially expandable material comprising substantially the entire length of the central member.
Claim 16
Dependent Claim
23 words
The device of claim 15 wherein said radially expandable material comprises a hydrophilic polymer material which expands upon conversion to a hydrogel material.
Claim 17
Dependent Claim
15 words
The device of claim 15 wherein said radially expandable material comprises a open cell foam.
Claim 18
Dependent Claim
14 words
The device of claim 15 wherein said radially expandable material comprises an elastomer material.
Claim 19
Dependent Claim
39 words
The device of claim 15 wherein said radially expandable material comprises a braided material which decreases in diameter when axially stretched and increases in diameter when axially compressed, said central member being coated with a flexible, fluid impervious material.
Claim 20
Dependent Claim
31 words
The device of claim 15 wherein said radially expandable material further is radially collapsible to provide retraction of the engagement of the central member with the interior wall of said vessel.
Claim 21
Dependent Claim
19 words
The device of claim 15 wherein: said radially expandable material comprises a heat responsive material having an inherent shape-memory.
Claim 22
Dependent Claim
73 words
The device of claim 21 wherein: said central member is formed of first and second sheets of said radially expandable material of shape-memory property that are laminated togethers, wherein the memory of the first sheet establishes a curled cross section, and heating means integrally secured to said first and second sheets respectively to selectively heat the sheets in response to a electrical current to contract and expand the diameter of the central member.
Claim 23
Dependent Claim
76 words
The device of claim 15 wherein: said radially expandable material comprises a radially flexible material at a portion of the central member; a choker tube formed with the radially expandable material; a thread extending through the choker tube to attach to said portion of the central member, whereby the tension on the thread draws the expandable material inward to decrease the diameter of the member, wherein release of tension allows said portion at the central member.
Claim 24
Dependent Claim
37 words
The device of claim 1 wherein: said central member is comprised of at least one wound coil, an elastomer material disposed about the coils and extending therebetween to define the structural support means of the central member.
Claim 25
Dependent Claim
35 words
The device of claim 24 wherein one end of said coils extends from the anastomosis site to allow application of a pulling force to said ends to unravel the coils from within said laminating material.
Claim 26
Dependent Claim
74 words
The device of claim 4 wherein: said central member includes a flexible loosely wound coil of a diameter generally corresponding to the diameter of said vessel: said means for providing an enlarged diameter including a coating of a flexible, fluid impervious material deposited about the coil to define a central lumen therethrough, said selectively tapered end members are comprised of coiled end portions having said coating of the flexible, fluid impervious material deposited thereon.
Claim 27
Dependent Claim
41 words
The device of claim 1 wherein: said central member is formed in two separate portions each with respective tapered end members; and said separate portions being insertable individually into said vessel through the arteriotomy and subsequently joined together within said vessel.
Claim 28
Dependent Claim
52 words
The device of claim 3 wherein: said selectively tapered end member was a guide opening in the conical wall thereof, a guide wire threaded through the guide opening and end member and through the arteriotomy into said vessel, and said guide wire facilitating the insertion of the device distally into said vessel.
Claim 29
Dependent Claim
31 words
The device of claim 1 wherein: said central member is formed with an arcuate portion removed therefrom diametrically opposite the anastomosis site to define a necked-down section of said central member.
Claim 30
Dependent Claim
36 words
The device of claim 1 further comprising: a device access member including an access lumen integrally formed to the central member, wherein said access lumen is in fluid communication with said lumen of the central member.
Claim 31
Dependent Claim
29 words
The device of claim 1 further comprising: a vessel supporting member formed with said device having means at the proximal end thereof to receive an end of said vessel.
Claim 32
Dependent Claim
91 words
The device of claim 1 wherein: said central member is formed of a pair of coaxially spaced flexible coils; a coating of elastomer material laminated about said coils and extending therebetween to form said central member; a choker tube formed with the central member and extending radially therefrom; thread means secured to the facing ends of the coils and extending through the choker tube, wherein force applied to the thread means axially stretches the coils to contract the shunt diameter and releasing the thread means allow the shunt diameter to expand.
Claim 33
Dependent Claim
21 words
An intravessel cardiac shunt disposed within a vessel of the beating heart and engaged against the inner walls of said vessel.
Claim 34
Dependent Claim
27 words
The device of claim 1 further comprising a shunt remover traversed by a thread affixed to said device and having a hollow portion for receiving said device.
Claim 35
Dependent Claim
25 words
The device of claim 1 further comprising a shunt insertion tool comprised of a body for receiving said device and plunger for deploying said device.
References Cited (Backward Citations)
US4483339A
Cited
EP0327325A1
Cited
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