Subcutaneous vascular access ports and related systems, methods, and implantation features

1. A vascular access port comprising:

a bottom surface configured to face a vessel when the vascular access port is coupled to the vessel, wherein the bottom surface includes an opening therein;

a body that extends away from the bottom surface, wherein the body is configured to remain beneath an outer surface of skin after the vascular access port has been implanted; and

a guidance passageway that extends through at least a portion of the body, wherein a central axis defined by the guidance passageway extends through the opening in the bottom surface such that the guidance passageway is configured to constrain one or more needles inserted individually therethrough to pass through the opening and through a specific region of a vessel when the vascular access port is coupled to the vessel, and wherein the guidance passageway is devoid of a closure apparatus.

2. The vascular access port of claim 1 , wherein the opening is at a distal end of the guidance passageway.

3. The vascular access port of claim 1 , wherein the opening is at a distal end of an implantation passageway that is connected to the guidance passageway.

4. The vascular access port of claim 1 , wherein the guidance passageway is configured to constrain movement of an access device along a path that is non-orthogonal and nonparallel to a lumen of a vessel when the vascular access port is coupled to the vessel.

5. The vascular access port of claim 1 , wherein the guidance passageway comprises a channel that defines a substantially constant diameter along a length thereof, and wherein a central axis of the channel defines an acute angle relative to the bottom surface of the vascular access port.

6. The vascular access port of claim 5 , wherein the acute angle is no greater than about 60 degrees.

7. The vascular access port of claim 1 , wherein the guidance passageway comprises a funnel region that decreases in size in a direction toward the opening in the bottom surface of the vascular access port.

8. The vascular access port of claim 7 , wherein a base surface of the funnel region projects rearwardly relative to the opening and flares outwardly in the rearward direction relative to a central vertical plane of the vascular access port.

9. The vascular access port of claim 7 , wherein the guidance passageway further comprises a channel between the funnel region and the opening.

10. The vascular access port of claim 1 , further comprising a palpation projection that extends about at least a portion of the guidance passageway.

11. The vascular access port of claim 10 , wherein the palpation projection extends about at least a portion of a proximal end of the guidance passageway and substantially defines a plane.

12. The vascular access port of claim 10 , wherein the palpation projection extends upwardly over a portion of the guidance passageway.

13. The vascular access port of claim 1 , wherein the body rises upwardly along a central vertical longitudinal plane of the vascular access port.

14. The vascular access port of claim 1 , wherein the bottom surface of the vascular access port comprises an ingrowth-inducing covering.

15. The vascular access port of claim 1 , wherein an interior surface of the vascular access port comprises an ingrowth-inducing covering.

16. The vascular access port of claim 15 , wherein the ingrowth-inducing covering is within an implantation passageway that passes through the vascular access port and is recessed relative to a sidewall of the implantation passageway.

17. The vascular access port of claim 1 , wherein the vascular access port is formed as a single unitary piece.

18. The vascular access port of claim 1 , further comprising one or more channels into which one or more attachment devices can be inserted in order to connect the vascular access port to a vessel.

19. The vascular access port of claim 18 , wherein the one or more attachment devices comprise a clip that comprises a connection post, and wherein the connection post comprises multiple resilient prongs that are configured to be inserted into a single channel of the vascular access port.

20. The vascular access port of claim 1 , further comprising one or more attachment recesses at a perimeter of the opening that are configured to receive one or more tooth portions of an attachment clip therein.

21. The vascular access port of claim 1 , further comprising one or more wedge-shaped everting members at a perimeter of the opening.

22. The vascular access port of claim 1 , wherein the guidance passageway comprises a temporary plug therein that is configured to resorb, dissolve, or otherwise vacate the guidance passageway after implantation of the vascular access port.

23. The vascular access port of claim 1 , wherein the vascular access port is configured to permit movement of an access device therethrough without any portion of the vascular access port moving relative to other portions of the vascular access port.

24. The vascular access port of claim 1 , wherein the vascular access port is coupled to the vessel, and wherein the vessel comprises an artificial graft.

25. A vascular access port comprising:

a bottom surface configured to face a vessel when the vascular access port is coupled to the vessel;

a body that extends away from the bottom surface, wherein the body is configured to remain beneath an outer surface of skin after the vascular access port has been implanted;

a guidance passageway that extends through at least a portion of the body to an opening in the bottom surface, wherein the guidance passageway is devoid of a closure apparatus;

an implantation passageway that extends through at least a portion of the body and that defines the opening in the bottom surface of the vascular access port, wherein the implantation passageway is connected to the guidance passageway; and

a closure device at an upper end of the implantation passageway, wherein the closure device is configured to seal the upper end of the implantation passageway after at least a portion of a percutaneous implantation device has been removed therefrom.

26. The vascular access port of claim 25 , wherein the sealing device is configured to automatically seal the upper end of the implantation passageway upon removal of the at least a portion of a percutaneous implantation device.

27. The vascular access port of claim 25 , wherein the sealing device comprises one or more flaps, a tube, or a plug.

28. A method comprising:

forming an opening in a sidewall of a vessel using a percutaneous implantation device;

providing a vascular access port that comprises an implantation passageway and a guidance passageway that are connected to each other, wherein at least a portion of the percutaneous implantation device extends through the implantation passageway, wherein the guidance passageway is devoid of a closure apparatus;

positioning the vascular access port at the sidewall of the vessel such that an opening at a bottom end of the implantation passageway in a bottom surface of the vascular access port is in fluid communication with a lumen of the vessel via the opening in the sidewall of the vessel;

removing the at least a portion of the percutaneous implantation device from the implantation passageway;

sealing an upper end of the implantation passageway; and

closing an implantation tract such that the vascular access port is entirely beneath a skin surface.

29. The method of claim 28 , further comprising inserting a needle through the guidance passageway of the vascular access port to access a lumen of the vessel.

30. The vascular access port of claim 1 , wherein the guidance passageway comprises an entry mouth at a proximal end thereof that is open to permit the one or more needles to pass freely through the entry mouth into the guidance passageway.

31. The vascular access port of claim 30 , wherein the entry mouth is configured to be surrounded by tissue and to permit tissue to extend through the entry mouth into the guidance passageway after the vascular access port has been implanted.

32. The vascular access port of claim 30 , wherein the entry mouth is configured to permit tissue that surrounds the vascular access port to be pressed against the entry mouth to assist in achieving hemostasis after the vascular access port has been implanted and after a needle has been removed from the vessel and from the vascular access port.

33. The vascular access port of claim 32 , wherein the entry mouth comprises a substantially U-shaped palpation projection.

34. The vascular access port of claim 32 , wherein the entry mouth substantially defines a plane.