Patent US5769870A successfully refreshed from Google Patents.
US5769870A
Expired / Lapsed
US
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Perfusion device for maintaining blood flow in a vessel while isolating an anastomosis
Assignee: Maquet Cardiovascular LLC
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Filing: 1996-02-20
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Granted: 1998-06-23
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Expires: 2016-02-20
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
- 👤 Amr Salahieh
- 👤 Charles S. Taylor
- 👤 Alfredo R. Cantu
- 👤 Ivan Sepetka
- 👤 Robert G. Matheny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:48
CPC Classifications
A; A61; A61B; A61B17/00; A61B17/12; A61B17/12022; A61B17/12027; A61B17/1204; A61B17/12045; A61B17/11; A61B17/12099; A61B17/12109; A61B17/12131; A61B17/12136; A61B2017/12127
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
102 words
A distal perfusion device for maintaining blood flow in a blood vessel to prevent ischemia while further maintaining a dry anastomosis site to facilitate the suturing procedure during the construction of an anastomosis comprising: a flexible central member having and outer diameter and having a centrally disposed lumen for the passage of fluid and a pair of pointed and tapered end members formed at proximal and distal extremities of the central member having integrally formed now-inflatable annular ridges with pre-selected outer diameters greater than the outer diameter of said central member and at least one perforation for the passage of fluid therethrough.
Claim 2
Dependent Claim
102 words
A distal perfusion device for maintaining blood flow in a blood vessel to prevent ischemia while further maintaining a dry anastomosis site to facilitate the suturing procedure during the construction of an anastomosis comprising: a flexible central member having and outer diameter and having a centrally disposed lumen for the passage of fluid and a pair of pointed and tapered end members formed at proximal and distal extremities of the central member having integrally formed now-inflatable annular ridges with pre-selected outer diameters greater than the outer diameter of said central member and at least one perforation for the passage of fluid therethrough.
Claim 3
Dependent Claim
18 words
The distal perfusion device of claim 1 further comprised of a filamentary strand attached to the central member.
Claim 4
Dependent Claim
31 words
The distal perfusion device of claim 2 wherein said strand comprises two diverging strands attached to the central member at spaced-apart points to facilitate insertion of the device into the vessel.
Claim 5
Dependent Claim
14 words
The distal perfusion device of claim 2 further comprising a choker tube or stub.
Claim 6
Dependent Claim
33 words
The distal perfusion device of claim 4 wherein the choker tube or stub is integrally secured to the central member by said filamentary strand wherein said filamentary strand extends through said choker tube.
Claim 7
Dependent Claim
47 words
The distal perfusion device of claim 2 wherein a portion of said strand is embedded within the wall and along the length of the central members such that when a pulling force is applied to said strand, the central member is caused to separate along its length.
Claim 8
Dependent Claim
17 words
The distal perfusion device of claim 1 wherein the relative geometry of the end members is asymmetrical.
Claim 9
Dependent Claim
27 words
The distal perfusion device of claim 1 wherein the end members are each tapered to a smaller diameter from a point of attachment to the central member.
Claim 10
Dependent Claim
17 words
The distal perfusion device of claim 1 wherein the central member is comprised of a flexible coil.
Claim 11
Dependent Claim
32 words
The distal perfusion device of claim 9 wherein the device is comprised of a material selected from the group consisting of silicone, an elastomer material, a polymer material, and a polymer elastomer.
Claim 12
Dependent Claim
18 words
The distal perfusion device of claim 1 wherein the apex of each said tapered end member is closed.
Claim 13
Dependent Claim
16 words
The distal perfusion device of claim 1 wherein said central member comprises an expandable polymeric spiral.
Claim 14
Dependent Claim
26 words
The distal perfusion device of claim 1 wherein said central member comprises a necked-down section along a substantial portion of the length of the central member.
Claim 15
Dependent Claim
25 words
The distal perfusion device of claim 1 wherein each said tapered end member comprises one perforation generally coincident with the apex of said end member.
Claim 16
Independent Claim
106 words
A method of employing a perfusion device at an anastomosis site in a vessel, comprising the steps of: inserting a first tapered end member of the perfusion device through an arteriotomy, advancing the first end member into the vessel beyond the apex of the arteriotomy wherein the first end member has at least one annular ridge with a preselected diameter to engage the interior of the vessel, inserting a second tapered end member beyond the opposite apex of the arteriotomy such that the distal perfusion device is positioned coaxially within the vessel maintaining blood flow distally through the vessel while the perfusion device is in place.
Claim 17
Independent Claim
106 words
A method of employing a perfusion device at an anastomosis site in a vessel, comprising the steps of: inserting a first tapered end member of the perfusion device through an arteriotomy, advancing the first end member into the vessel beyond the apex of the arteriotomy wherein the first end member has at least one annular ridge with a preselected diameter to engage the interior of the vessel, inserting a second tapered end member beyond the opposite apex of the arteriotomy such that the distal perfusion device is positioned coaxially within the vessel maintaining blood flow distally through the vessel while the perfusion device is in place.
Claim 18
Dependent Claim
29 words
The method of claim 15 further comprising the step of centering the perfusion device relative to the apexes of the arteriotomy such that the perfusion device spans the arteriotomy.
Claim 19
Dependent Claim
21 words
The method of claim 16 further comprising the step of: removing the device with a thread attached to the central member.
Claim 20
Dependent Claim
35 words
The method of claim 15 wherein the perfusion device is flexed at a point along the central member to facilitate placing the second tapered end member into the arteriotomy and into place in the vessel.
Claim 21
Dependent Claim
23 words
The method of claim 15 further comprising sealing blood flow from the anastomosis using a suture surrounding the perfusion device and the vessel.
Claim 22
Dependent Claim
123 words
Apparatus for maintaining blood flow in a blood vessel to prevent ischemia while further maintaining a dry anastomosis site to facilitate the suturing procedure during the construction of an anastomosis of said vessel with a second vessel, comprising: a selection of distinctly sized distal perfusion devices, each said device comprising a flexible central member having an outer diameter and having a centrally disposed lumen and a pair of pointed and tapered end members formed at the proximal and distal extremities of the central member, wherein said end members of each of said devices has integrally formed now-inflatable annular ridges with preselected outer diameters greater than the outer diameter of said central member and at least one perforation for the passage of fluid therethrough.
Claim 23
Dependent Claim
123 words
Apparatus for maintaining blood flow in a blood vessel to prevent ischemia while further maintaining a dry anastomosis site to facilitate the suturing procedure during the construction of an anastomosis of said vessel with a second vessel, comprising: a selection of distinctly sized distal perfusion devices, each said device comprising a flexible central member having an outer diameter and having a centrally disposed lumen and a pair of pointed and tapered end members formed at the proximal and distal extremities of the central member, wherein said end members of each of said devices has integrally formed now-inflatable annular ridges with preselected outer diameters greater than the outer diameter of said central member and at least one perforation for the passage of fluid therethrough.
Claim 24
Dependent Claim
25 words
The apparatus of claim 20 wherein said preselected diameters of said integrally formed annular ridges differ among said selection of distinctly sized distal perfusion devices.
Claim 25
Dependent Claim
15 words
The apparatus of claim 21 wherein the relative geometry of the end members is asymmetrical.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-06-22 | 2001-12-22 | 2002-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-06-22 | 2005-12-22 | 2006-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-06-22 | 2009-12-22 | 2010-06-23 | $7700.00 | Window Closed / Lapsed |