Vascular coupling device
Implementations of the present disclosure relate to apparatuses, systems, and methods for anastomosing vascular systems in medical procedures. A pair of similar or identical coupling devices may be disposed at the ends of two vessels, either natural or synthetic. The coupling devices may be capable of hermaphroditically connecting to one another to provide a simple and secure connection which promotes growth of the vessels between the bio-absorbable coupling devices.
1. A coupling device for providing a coupling site on a body lumen, the device comprising:
a back ring configured to fit around the body lumen, the back ring having a rear proximal portion and a forward distal portion; and
an engaging coupler including
a body that defines an inner lumen, the inner lumen being sized to at least partially receive the forward distal portion of the back ring,
a plurality of engaging arms extending distally from the body, and
a plurality of cuts with radial depth disposed in an outer surface of the engaging coupler,
wherein the engaging coupler is configured to enable attachment of the coupling device to an identical coupling device, the plurality of cuts of the engaging coupler being configured to accommodate engaging arms of the identical coupling device when the coupling devices are attached, and
wherein the plurality of cuts are angled so as to urge the engaging arms of the identical coupling device radially outward from the outer surface of the engaging coupler when the coupling devices are attached.
2. The device of claim 1 , wherein each of the plurality of cuts is positioned between adjacent engaging arms.
3. The device of claim 1 , wherein the plurality of engaging arms are disposed around a circumference of the engaging coupler at substantially equal angular displacements.
4. The device of claim 1 , wherein the coupling device has two engaging arms and wherein the engaging arms are circumferentially disposed about 180 degrees from each other.
5. The device of claim 1 , wherein the engaging arms each comprise a hook.
6. The device of claim 5 , wherein the hook includes an undercut groove.
7. The device of claim 5 , wherein the back ring includes a groove on a rear face of the back ring, and wherein the hook is configured to engage with the groove on the rear face of the back ring.
8. The device of claim 1 , wherein the engaging coupler further comprises a plurality of proximal engaging arms extending proximally from the body of the engaging coupler.
9. The device of claim 8 , wherein the proximal engaging arms extend proximally beyond the back ring to engage with a rear face of the back ring to limit proximal movement of the back ring relative to the engaging coupler.
10. The device of claim 1 , wherein the coupling device comprises a bio-absorbable material.
11. The device of claim 1 , wherein the engaging coupler has an elliptically-shaped outer surface.
12. The device of claim 11 , wherein the elliptically-shaped outer surface includes a major axis and a minor axis, the engaging arms being disposed at the major axis and the cuts being disposed at the minor axis.
13. A vascular coupling system for coupling a first vessel end to a second vessel end, the system comprising:
a first coupling device configured for attachment to the first vessel end; and
a second coupling device configured for attachment to the second vessel end, the first and second coupling devices being configured to couple to each other to thereby connect the first vessel end and the second vessel end, the first and second coupling devices each including
a back ring configured to fit around a respective vessel near the respective vessel end, the back ring having a distal portion, proximal portion, and a rear face located at a proximal end, and
an engaging coupler with a body that defines a lumen sized to at least partially receive the distal portion of the back ring, the engaging coupler including a plurality of engaging arms extending distally from the body and including a plurality of cuts in an outer surface of the engaging coupler,
wherein the first and second coupling devices are configured such that when coupled together, the engaging arms of the first coupling device extend through the cuts of the engaging coupler of the second coupling device, and the engaging arms of the second coupling device extend through the cuts of the engaging coupler of the first coupling device, and
wherein the first and second coupling devices are configured such that when coupled together, the engaging arms of the first coupling device extend beyond the back ring of the second coupling device to engage with the rear face of the back ring of the second coupling device, and the engaging arms of the second coupling device extend beyond the back ring of the first coupling device to engage with the rear face of the back ring of the first coupling device.
14. The system of claim 13 , wherein the engaging arms of the first and second coupling devices are equally spaced around outer surfaces of their respective engaging couplers.
15. The system of claim 13 , wherein the first and second coupling devices are identical.
16. A method for coupling a first vessel end to a second vessel end, the method comprising:
providing the vascular coupling system of claim 14 ;
positioning the back ring of the first coupling device circumferentially around the first vessel end;
everting the first vessel end over an outer diameter of the back ring of the first coupling device;
assembling the first coupling device by positioning the engaging coupler of the first coupling device over the first vessel end and over an outer surface of the back ring of the first coupling device, creating a friction fit of the engaging coupler of the first coupling device and the back ring of the first coupling device with the first vessel end disposed therebetween;
assembling the second coupling device on the second vessel end; and
engaging the first coupling device with the second coupling device.
17. A coupling device for providing a coupling site on a body lumen, the device comprising:
a back ring configured to fit around the body lumen, the back ring having a rear proximal portion and a forward distal portion; and
an engaging coupler including
a body that defines an inner lumen, the inner lumen being sized to at least partially receive the forward distal portion of the back ring,
a plurality of engaging arms extending distally from the body, and
a plurality of cuts with radial depth disposed in an outer surface of the engaging coupler,
wherein the engaging coupler is configured to enable attachment of the coupling device to an identical coupling device, the plurality of cuts of the engaging coupler being configured to accommodate engaging arms of the identical coupling device when the coupling devices are attached,
wherein the engaging coupler further comprises a plurality of proximal engaging arms extending proximally from the body of the engaging coupler, and
wherein the proximal engaging arms extend proximally beyond the back ring to engage with a rear face of the back ring to limit proximal movement of the back ring relative to the engaging coupler.
18. A method for coupling a first vessel end to a second vessel end, the method comprising:
(i) providing a vascular coupling system for coupling the first vessel end to the second vessel end, the system comprising:
a first coupling device configured for attachment to the first vessel end; and
a second coupling device configured for attachment to the second vessel end, the first and second coupling devices being configured to couple to each other to thereby connect the first vessel end and the second vessel end, the first and second coupling devices each including
a back ring configured to fit around a respective vessel near the respective vessel end, the back ring having a distal portion, proximal portion, and a rear face located at a proximal end, and
an engaging coupler with a body that defines a lumen sized to at least partially receive the distal portion of the back ring, the engaging coupler including a plurality of engaging arms extending distally from the body and including a plurality of cuts in an outer surface of the engaging coupler,
wherein the first and second coupling devices are configured such that when coupled together, the engaging arms of the first coupling device extend through the cuts of the engaging coupler of the second coupling device, and the engaging arms of the second coupling device extend through the cuts of the engaging coupler of the first coupling device;
(ii) positioning the back ring of the first coupling device circumferentially around the first vessel end;
(iii) creating cuts in a portion of the first vessel end and extending the first vessel end beyond a front edge of the back ring of the first coupling device;
(iv) everting the first vessel end over an outer diameter of the back ring of the first coupling device;
(v) assembling the first coupling device by positioning the engaging coupler of the first coupling device over the first vessel end and over an outer surface of the back ring of the first coupling device, creating a friction fit of the engaging coupler of the first coupling device and the back ring of the first coupling device with the first vessel end disposed therebetween;
(vi) assembling the second coupling device on the second vessel end; and
(vii) engaging the first coupling device with the second coupling device.