Tools and methods for vaginal access

1. An access port for sealing an opening of a natural orifice and supplying access to a body cavity through the natural orifice comprising:

a sealing unit;

an unobstructed single lumen cannula extending to said body cavity;

a connector connecting said cannula to said sealing unit; said connector comprising a connector lumen which defines an access opening through the sealing unit to said single lumen; wherein said connector lumen comprises proximal and distal openings, said proximal opening disposed proximal to a proximal face of said sealing unit, said distal opening disposed distal of a distal face of said sealing unit; and

a cap including a plurality of cap openings configured to seal between medical instruments inserted into said cap openings and said access opening.

2. The access port of claim 1 , wherein one or both of proximal and distal openings of said connector has a flange.

3. The access port of claim 1 , comprising an opening through said sealing unit to the natural orifice.

4. The access port of claim 1 , wherein said natural orifice is a vagina.

5. The access port of claim 1 , wherein said cannula is open to an intraperitoneal cavity through said natural orifice.

6. The access port of claim 1 , comprising a sheath extending from a proximal face of said sealing unit, through said sealing unit and through to said cannula lumen and extending within at least a portion of a length of said cannula lumen.

7. The access port of claim 6 , comprising a cannula seal configured to seal one or both of a proximal opening of said cannula and a proximal opening of said sheath.

8. The access port of claim 1 , comprising a port element describing a channel through said sealing unit and opening to said cavity.

9. The access port of claim 1 , comprising a port element describing a channel through said sealing unit and opening into said lumen of said cannula.

10. The access port of claim 9 , wherein said port element includes a sheath extending from a proximal face of said sealing unit, through said cannula and extending within a least a portion of said cannula.

11. The access port of claim 1 , wherein a transverse cross section of said single lumen has a long dimension and a short dimension; and

wherein each of said cap openings has a width smaller than said short dimension and the sum of widths of said plurality of cap openings is greater than said short dimension and less than said long dimension.

12. The access port of claim 11 , wherein said cross section of said single lumen has, in at least one dimension, a width of at least 21 mm.

13. The access port of claim 1 , wherein a transverse cross section of said single lumen has a long dimension and a short dimension, and at least one of said openings has a width at least 90% the short dimension.

14. A kit for providing access to a cannula leading to a body cavity through a seal on a natural orifice comprising:

a connector comprising:

a channel with a distal opening and a proximal opening, said channel configured to pass through said seal and attach to a cannula passing through the orifice to the body cavity, said connector having a distal opening on an inner side of said seal and a proximal opening on an outer side of said seal;

a cap comprising a plurality of openings and sized and shaped to seal a lumen of said cannula;

a sheath sized and shaped to pass through said connector and extend within at least a portion of said cannula lumen; and

a sealing element sized and shaped to fit to one or both of said sheath and said cannula and including elastically bendable flexible portions which, when elastically relaxed, close a lumen of said sealing element to seal one or both of said sheath and said cannula.

15. The kit of claim 14 , wherein said cap is sized and shaped to attach to one or more of a proximal opening of said cannula, a proximal opening of said sheath, and a proximal opening of said connector.

16. The kit of claim 14 , wherein said distal opening of said connector has a cross section with a long dimension and a short dimension and wherein said long dimension is at least twice said short dimension.

17. The kit of claim 14 , further comprising an introducer for insertion of said connector into or through said seal, said introducer including a handle at a proximal portion of said introducer and a distal portion shaped and sized to fit into said channel of said connector; wherein said handle comprises a portion which is larger than an entrance to said channel of said connector.

18. The kit of claim 17 , wherein said distal portion of said introducer comprises a tapered portion.

19. The kit of claim 14 , wherein said cap comprises a duckbill gasket defining a protrusion in the direction of said cannula.