Surgical access apparatus and method
View Patent ↗A surgical access device includes a single valve that forms a seal with the body wall and provides an access channel into a body cavity. The valve has properties for creating a zero seal in the absence of an instrument as well as an instrument seal with instruments having a full range of instrument diameter. The valve can include a gel and preferably an ultragel comprised of an elastomer and an oil providing elongation greater than 1000 percent and durometer less than 5 Shore A. The single valve can be used as a hand port where the instrument comprises the arm of a surgeon, thereby providing hand access into the cavity.
1. A surgical access device adapted to provide access to a cavity in a patient while maintaining a seal between the cavity and an area outside the patient, comprising:
a gel pad comprises a self-sealing valve made of gel material and is configured to conform around an object extending through the self-sealing valve and seal in the absence of an object extending through the self-sealing valve;
an external ring molded into the gel pad and defining a circumference smaller than a circumference of the gel pad, the gel material covering and extending to limits beyond the circumference of the external ring; and
a membrane coupled to the external ring and arranged to extend inside the patient;
wherein the external ring and a portion of the membrane affixed to the external ring are embedded completely inside and affixed to the gel material of the gel pad.
2. The access device of claim 1 further comprising an internal ring being compressible, coupled to the membrane and arranged to be placed inside the patient.
3. The access device of claim 1 wherein the self-sealing valve has an opening therethrough that remains sealed by the gel material in the absence of an object extending through the opening.
4. The access device of claim 3 wherein the opening is a linear slit.
5. The access device of claim 4 wherein the slit, membrane and an internal ring coupled to the membrane are arranged to form a working channel from outside the patient to inside the cavity of the patient.
6. The access device of claim 3 wherein the opening is a trapezoidal slit extending there through.
7. The access device of claim 1 wherein the membrane has a fixed length.
8. The access device of claim 1 wherein the membrane has a cylindrical configuration.
9. The access device of claim 1 further comprising an adhesive ring coupled to the gel pad.
10. The access device of claim 1 wherein a portion of the membrane coupled to the external ring is disposed between the external ring and the gel pad.
11. The access device of claim 1 wherein the membrane coupled to an outer surface of the external ring.
12. The access device of claim 1 wherein the gel pad, external ring and membrane are adapted to accommodate a range of instrument sizes from about two French to about four inches.
13. The access device of claim 1 wherein the gel pad, external ring and membrane are adapted to accommodate a range of instrument sizes from about 3 mm to about 12 mm.
14. The access device of claim 1 wherein the gel pad, external ring and membrane are adapted to accommodate a range of instrument sizes from about 9 mm to about 12 mm.
15. The access device of claim 1 wherein the gel pad, external ring and membrane are adapted to accommodate a range of instrument sizes from about 5 mm to about 9 mm.
16. The access device of claim 1 wherein the gel pad, external ring and membrane are adapted to accommodate a range of instrument sizes from about 3 mm to about 5 mm.
17. The access device of claim 1 wherein the gel pad, external ring and membrane are adapted to accommodate a range of instrument sizes less than about 12 mm.
18. The access device of claim 1 wherein the gel pad is made of an ultragel.
19. The access device of claim 1 wherein the gel pad, external ring and membrane are adapted to accommodate a range of instrument sizes from about the size of a guidewire to about the size of a surgeon's arm.