Anastomotic fitting

• US 4,366,819 A
• Filed: 11/17/1980
• Issued: 01/04/1983
• Est. Priority Date: 11/17/1980
• Status: Expired due to Term

• Current Assignee: AorTech, Inc. (IQUniverse, Inc.)
• Original Assignee: Robert L. Kaster
• Inventors: Kaster, Robert L.
• Primary Examiner(s): Thaler, Michael H.
• Application Number:
  US06/207,676
• Time in Patent Office: 778 Days
• Field of Search: 128/334 R, 128/334 C, 128/283, 128/348
• US Class Current: 606/153
• CPC Class Codes: A61B 17/11 for performing anastomosis; Buttons for anastomosis
• CPC Class Codes: A61B 2017/1135 End-to-side connections, e.g. T- or Y-connections Y-shaped blood vessel prostheses A61F2002/065
• CPC Class Codes: A61F 2/064 with special features to facilitate anastomotic coupling anastomosis of natural blood vessels A61B17/11

Abstract

Anastomotic fitting for coronary artery bypass graft surgery having an assembly of four components including a cylindrical tube having at least one ringflange locking indentation in an inflow end and a plurality of locking ring grooves in an outflow end, a ringflange having a central aperture and pluralities of long and short spikes, the long spikes engaging in the locking indentation, with a graft engaged therebetween, a fixation ring having a central aperture and a plurality of spikes positioned about the aperture, and a locking ring having an aperture with a plurality of locking ring ridges for engagement with the locking ring grooves. At surgical implantation an aortic wall having a hole therein engages between the ringflange and the fixation ring and is held in position by the spikes of the fixation ring, and the four components engage together forming an integral anastomotic fitting. A first alternative embodiment includes a three-component anastomotic fitting having a combination fixation ring-locking ring. A second alternative embodiment includes a four-component anastomotic fitting having a slightly flared end at an inflow end yielding a larger exposure of graft material at the anastomotic ostium.

Claims

1. Anastomotic fitting for connecting a vascular graft to a blood vessel comprising:

a. means for positioning in a hole between an inner and outer wall of a blood vessel including an inflow orifice, a section of cylindrical tube, and an outflow orifice serially, said means including a lumen for supporting a vascular graft through said positioning means and everting back about said inflow orifice, and at least one indentation groove and a plurality of external surface sawtooth locking rings outwardly extending grooves disposed on each of said inflow and outflow ends of said positioning means respectively;

b. means including a cylindrical ring of triangular cross section for engaging said overlapped vascular graft and locked into said indentation adjacent said inflow end and engaged against an inside wall about said hole of said blood vessel, said engaging means including means for flexing cross-sectional area of said engaging means, and a plurality of spaced circumferentially long and short spike means projecting inwardly for engaging into said graft;

c. means for affixing said positioning means including said affixing means having a plurality of spike means projecting inwardly from said affixing means for engaging an outside wall about said hole of said blood vessel; and

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d. means for locking said affixation means to said positioning means, said locking means including means for engaging sawtooth locking ring inwardly extending grooves with said outwardly extending grooves of said positioning means and means for flexing cross-sectional area of said locking means at said outflow orifice of said positioning means whereby said anastomotic fitting provides a surgical connection between said vascular graft to said blood vessel and said short spike means engages said graft and said long spike means engaging into said indentation groove through said graft thereby securing said graft.

2. Anastomotic fitting of claim 1 wherein said positioning means comprises:

tube including a short hollow right cylinder, a smoth internal surface, an inflow orifice at one end, a ringflange indentation disposed in an outer surface adjacent said inflow orifice, and at least one locking ring groove disposed in an outer surface adjacent an outflow orifice.

3. Anastomotic fitting of claim 2 wherein said number of locking ring grooves comprises five to ten.

4. Anastomotic fitting of claim 1 wherein said engaging means comprises:

ringflange including a concentric central aperture, pluralities of short and long spikes extending inwardly from an interior diameter, said short spikes engage said overlapped vascular graft and said long spikes engage through said vascular graft into said indentation at said outflow end.

5. Anastomotic fitting of claim 4 wherein said flexing means comprises a slit through cross-section of said member whereby said slit facilitates engagement about said tube.

6. Anastomotic fitting of claim 1 wherein said affixing means comprises:

member including a central aperture and pluralities of spikes extending outwardly from an angular face of said member whereby said central aperture engages with said positioning means and said pluralities of spikes engage against said blood vessel wall.

7. Anastomotic fitting of claim 1 wherein said locking means comprises:

member including a central aperture and at least one locking ridge extending inwardly from an interior diameter of said member whereby said locking ring ridge engages against said groove disposed on said outflow end of said positioning means.

8. Anastomotic fitting of claim 7 wherein said number of locking ring ridges comprise one to three.

9. Anastomotic fitting of claim 7 wherein said flexing means comprises a slit through said cross-section of said member whereby said slit facilitates engagement about said positioning means.

10. Anastomotic fitting of claim 1 wherein said affixation means and said locking means comprises:

a. integral member including member including a concentric central aperture, pluralities of spikes extending outwardly from an angular face of said member; and

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b. at least one locking ridge extending inwardly from an interior diameter of said circular member whereby said central aperture engages with said positioning means, said pluralities of spikes engage against said blood vessel and said locking ring ridge engages against said groove disposed on said outflow end of positioning means.

11. Anastomotic fitting of claim 10 wherein said flexing means comprises a slit through cross-section of said integral member whereby said slit facilitates engagement about said positioning means.

12. Anastomotic fitting of claim 1 wherein said positioning means and said engaging means comprise:

a. said positioning means further comprises a flared lip at said inflow orifice;

b. said engaging means comprises a member including circular geometrical configured interior diameter including inversely rounded short spikes for engagement over said flared end and rounded long spikes for engagement in said indentation adjacent said inflow end.

13. Anastomotic fitting of claim 12 wherein said flexing means comprises a slit through cross-section of said circular geometrically configured engaging means member whereby said slit facilitates engagement about said positioning means.

14. Anastomotic fitting for coronary artery bypass surgery for connecting a vascular graft or reconnecting a vessel of a first diameter to a vessel of a second diameter, said anastomotic fitting comprising:

a. cylindrical tube including a lumen extending therethrough, serially, a ringflange circumferential indentation adjacent an inflow end of said tube, a longitudinal section of said tube, and plurality of external surface sawtooth locking ring grooves spaced and adjacent an external surface of an outflow end of said tube from said inflow end to said outflow end;

b. ringflange including a cross-sectional slitted member and a concentric central aperture therethrough, plurality of inwardly extending short spikes on a first circumference and long spikes on a second circumference spaced from said first circumference, said short spikes engaging said vascular graft at a plurality of points and said long spikes engaging through said vascular graft into said ringflange indentation, said ringflange engaged against an inside vessel and over an end of said vascular graft;

c. fixation ring including a truncated conical member and a concentric central aperture therethrough, pluralities of inwardly extending spikes about an internal surface of said truncated conical member partially engaged into an outside vessel wall; and

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d. locking ring including a cylindrical ring member and a concentric central aperture therethrough, a plurality of inwardly extending sawtooth locking ring ridges for engaging with said outwardly extending grooves of said cylindrical tube, and a cross-sectional slit therethrough whereby said anastomotic fitting provides a surgical connection between said vascular graft to said blood vessel.

15. Anastomotic fitting for coronary artery bypass surgery for connecting a vascular graft or reconnecting a vessel of a first diameter to a vessel of a second diameter, said anastomotic fitting comprising:

a. cylindrical tube of longitudinal length including a lumen extending therethrough, serially, a ringflange circumferential indentation adjacent an inflow end of said tube and plurality of external surface sawtooth locking ring grooves spaced and adjacent an outflow end of said tube;

b. ringflange including a cross-sectional slitted member and a concentric central aperture therethrough, plurality of inwardly extending short spikes on a first circumference and long spikes on a second circumference spaced from said first circumference, said short spikes engaging said vascular graft at a plurality of points and said long spikes engaging through said vascular graft into said ringflange indentation, and said ringflange engaged against an inside vessel wall and over an end of said vascular graft; and

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c. fixation ring-locking ring including a truncated right conical member and a concentric central aperture therethrough, pluralities of outwardly extending spikes partially engaged into an outside vessel wall, a plurality of inwardly extending locking ring sawtooth ridges, and a cross-sectional slit therethrough whereby said inwardly extending grooves engage with said external grooves for locking said fixation ring-locking ring to said cylindrical tube with said vessel therebetween, thereby providing a surgical connection between said vessel and said vascular graft.